feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/sdl-3.0.0/src/SDL.c

@@ -0,0 +1,667 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+#include "SDL3/SDL_revision.h"
+
+#if defined(__WIN32__) || defined(__GDK__)
+#include "core/windows/SDL_windows.h"
+#elif !defined(__WINRT__)
+#include <unistd.h> /* _exit(), etc. */
+#endif
+
+/* this checks for HAVE_DBUS_DBUS_H internally. */
+#include "core/linux/SDL_dbus.h"
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
+
+/* Initialization code for SDL */
+
+#include "SDL_assert_c.h"
+#include "SDL_log_c.h"
+#include "SDL_properties_c.h"
+#include "audio/SDL_sysaudio.h"
+#include "video/SDL_video_c.h"
+#include "events/SDL_events_c.h"
+#include "haptic/SDL_haptic_c.h"
+#include "joystick/SDL_gamepad_c.h"
+#include "joystick/SDL_joystick_c.h"
+#include "sensor/SDL_sensor_c.h"
+
+/* Initialization/Cleanup routines */
+#ifndef SDL_TIMERS_DISABLED
+#include "timer/SDL_timer_c.h"
+#endif
+#ifdef SDL_VIDEO_DRIVER_WINDOWS
+extern int SDL_HelperWindowCreate(void);
+extern int SDL_HelperWindowDestroy(void);
+#endif
+
+#ifdef SDL_BUILD_MAJOR_VERSION
+SDL_COMPILE_TIME_ASSERT(SDL_BUILD_MAJOR_VERSION,
+                        SDL_MAJOR_VERSION == SDL_BUILD_MAJOR_VERSION);
+SDL_COMPILE_TIME_ASSERT(SDL_BUILD_MINOR_VERSION,
+                        SDL_MINOR_VERSION == SDL_BUILD_MINOR_VERSION);
+SDL_COMPILE_TIME_ASSERT(SDL_BUILD_MICRO_VERSION,
+                        SDL_PATCHLEVEL == SDL_BUILD_MICRO_VERSION);
+#endif
+
+SDL_COMPILE_TIME_ASSERT(SDL_MAJOR_VERSION_min, SDL_MAJOR_VERSION >= 0);
+/* Limited only by the need to fit in SDL_version */
+SDL_COMPILE_TIME_ASSERT(SDL_MAJOR_VERSION_max, SDL_MAJOR_VERSION <= 255);
+
+SDL_COMPILE_TIME_ASSERT(SDL_MINOR_VERSION_min, SDL_MINOR_VERSION >= 0);
+/* Limited only by the need to fit in SDL_version */
+SDL_COMPILE_TIME_ASSERT(SDL_MINOR_VERSION_max, SDL_MINOR_VERSION <= 255);
+
+SDL_COMPILE_TIME_ASSERT(SDL_PATCHLEVEL_min, SDL_PATCHLEVEL >= 0);
+/* Limited by its encoding in SDL_VERSIONNUM and in the ABI versions */
+SDL_COMPILE_TIME_ASSERT(SDL_PATCHLEVEL_max, SDL_PATCHLEVEL <= 99);
+
+/* This is not declared in any header, although it is shared between some
+    parts of SDL, because we don't want anything calling it without an
+    extremely good reason. */
+extern SDL_NORETURN void SDL_ExitProcess(int exitcode);
+SDL_NORETURN void SDL_ExitProcess(int exitcode)
+{
+#if defined(__WIN32__) || defined(__GDK__)
+    /* "if you do not know the state of all threads in your process, it is
+       better to call TerminateProcess than ExitProcess"
+       https://msdn.microsoft.com/en-us/library/windows/desktop/ms682658(v=vs.85).aspx */
+    TerminateProcess(GetCurrentProcess(), exitcode);
+    /* MingW doesn't have TerminateProcess marked as noreturn, so add an
+       ExitProcess here that will never be reached but make MingW happy. */
+    ExitProcess(exitcode);
+#elif defined(__EMSCRIPTEN__)
+    emscripten_cancel_main_loop();   /* this should "kill" the app. */
+    emscripten_force_exit(exitcode); /* this should "kill" the app. */
+    exit(exitcode);
+#elif defined(__HAIKU__)  /* Haiku has _Exit, but it's not marked noreturn. */
+    _exit(exitcode);
+#elif defined(HAVE__EXIT) /* Upper case _Exit() */
+    _Exit(exitcode);
+#else
+    _exit(exitcode);
+#endif
+}
+
+/* The initialized subsystems */
+#ifdef SDL_MAIN_NEEDED
+static SDL_bool SDL_MainIsReady = SDL_FALSE;
+#else
+static SDL_bool SDL_MainIsReady = SDL_TRUE;
+#endif
+static SDL_bool SDL_bInMainQuit = SDL_FALSE;
+static Uint8 SDL_SubsystemRefCount[32];
+
+/* Private helper to increment a subsystem's ref counter. */
+static void SDL_IncrementSubsystemRefCount(Uint32 subsystem)
+{
+    const int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
+    SDL_assert((subsystem_index < 0) || (SDL_SubsystemRefCount[subsystem_index] < 255));
+    if (subsystem_index >= 0) {
+        ++SDL_SubsystemRefCount[subsystem_index];
+    }
+}
+
+/* Private helper to decrement a subsystem's ref counter. */
+static void SDL_DecrementSubsystemRefCount(Uint32 subsystem)
+{
+    const int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
+    if ((subsystem_index >= 0) && (SDL_SubsystemRefCount[subsystem_index] > 0)) {
+        --SDL_SubsystemRefCount[subsystem_index];
+    }
+}
+
+/* Private helper to check if a system needs init. */
+static SDL_bool SDL_ShouldInitSubsystem(Uint32 subsystem)
+{
+    const int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
+    SDL_assert((subsystem_index < 0) || (SDL_SubsystemRefCount[subsystem_index] < 255));
+    return ((subsystem_index >= 0) && (SDL_SubsystemRefCount[subsystem_index] == 0)) ? SDL_TRUE : SDL_FALSE;
+}
+
+/* Private helper to check if a system needs to be quit. */
+static SDL_bool SDL_ShouldQuitSubsystem(Uint32 subsystem)
+{
+    const int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
+    if ((subsystem_index >= 0) && (SDL_SubsystemRefCount[subsystem_index] == 0)) {
+        return SDL_FALSE;
+    }
+
+    /* If we're in SDL_Quit, we shut down every subsystem, even if refcount
+     * isn't zero.
+     */
+    return (((subsystem_index >= 0) && (SDL_SubsystemRefCount[subsystem_index] == 1)) || SDL_bInMainQuit) ? SDL_TRUE : SDL_FALSE;
+}
+
+void SDL_SetMainReady(void)
+{
+    SDL_MainIsReady = SDL_TRUE;
+}
+
+int SDL_InitSubSystem(Uint32 flags)
+{
+    Uint32 flags_initialized = 0;
+
+    if (!SDL_MainIsReady) {
+        return SDL_SetError("Application didn't initialize properly, did you include SDL_main.h in the file containing your main() function?");
+    }
+
+    SDL_InitLog();
+    SDL_InitProperties();
+
+    /* Clear the error message */
+    SDL_ClearError();
+
+#ifdef SDL_USE_LIBDBUS
+    SDL_DBus_Init();
+#endif
+
+    if (flags & SDL_INIT_GAMEPAD) {
+        /* game controller implies joystick */
+        flags |= SDL_INIT_JOYSTICK;
+    }
+
+    if (flags & (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO)) {
+        /* video or joystick or audio implies events */
+        flags |= SDL_INIT_EVENTS;
+    }
+
+#ifdef SDL_VIDEO_DRIVER_WINDOWS
+    if (flags & (SDL_INIT_HAPTIC | SDL_INIT_JOYSTICK)) {
+        if (SDL_HelperWindowCreate() < 0) {
+            goto quit_and_error;
+        }
+    }
+#endif
+
+#ifndef SDL_TIMERS_DISABLED
+    SDL_InitTicks();
+#endif
+
+    /* Initialize the event subsystem */
+    if (flags & SDL_INIT_EVENTS) {
+#ifndef SDL_EVENTS_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_EVENTS)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_EVENTS);
+            if (SDL_InitEvents() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_EVENTS);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_EVENTS);
+        }
+        flags_initialized |= SDL_INIT_EVENTS;
+#else
+        SDL_SetError("SDL not built with events support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the timer subsystem */
+    if (flags & SDL_INIT_TIMER) {
+#if !defined(SDL_TIMERS_DISABLED) && !defined(SDL_TIMER_DUMMY)
+        if (SDL_ShouldInitSubsystem(SDL_INIT_TIMER)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_TIMER);
+            if (SDL_InitTimers() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_TIMER);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_TIMER);
+        }
+        flags_initialized |= SDL_INIT_TIMER;
+#else
+        SDL_SetError("SDL not built with timer support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the video subsystem */
+    if (flags & SDL_INIT_VIDEO) {
+#ifndef SDL_VIDEO_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_VIDEO)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_VIDEO);
+            if (SDL_VideoInit(NULL) < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_VIDEO);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_VIDEO);
+        }
+        flags_initialized |= SDL_INIT_VIDEO;
+#else
+        SDL_SetError("SDL not built with video support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the audio subsystem */
+    if (flags & SDL_INIT_AUDIO) {
+#ifndef SDL_AUDIO_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_AUDIO)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_AUDIO);
+            if (SDL_InitAudio(NULL) < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_AUDIO);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_AUDIO);
+        }
+        flags_initialized |= SDL_INIT_AUDIO;
+#else
+        SDL_SetError("SDL not built with audio support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the joystick subsystem */
+    if (flags & SDL_INIT_JOYSTICK) {
+#ifndef SDL_JOYSTICK_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_JOYSTICK)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_JOYSTICK);
+            if (SDL_InitJoysticks() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_JOYSTICK);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_JOYSTICK);
+        }
+        flags_initialized |= SDL_INIT_JOYSTICK;
+#else
+        SDL_SetError("SDL not built with joystick support");
+        goto quit_and_error;
+#endif
+    }
+
+    if (flags & SDL_INIT_GAMEPAD) {
+#ifndef SDL_JOYSTICK_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_GAMEPAD)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_GAMEPAD);
+            if (SDL_InitGamepads() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_GAMEPAD);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_GAMEPAD);
+        }
+        flags_initialized |= SDL_INIT_GAMEPAD;
+#else
+        SDL_SetError("SDL not built with joystick support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the haptic subsystem */
+    if (flags & SDL_INIT_HAPTIC) {
+#ifndef SDL_HAPTIC_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_HAPTIC)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_HAPTIC);
+            if (SDL_InitHaptics() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_HAPTIC);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_HAPTIC);
+        }
+        flags_initialized |= SDL_INIT_HAPTIC;
+#else
+        SDL_SetError("SDL not built with haptic (force feedback) support");
+        goto quit_and_error;
+#endif
+    }
+
+    /* Initialize the sensor subsystem */
+    if (flags & SDL_INIT_SENSOR) {
+#ifndef SDL_SENSOR_DISABLED
+        if (SDL_ShouldInitSubsystem(SDL_INIT_SENSOR)) {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_SENSOR);
+            if (SDL_InitSensors() < 0) {
+                SDL_DecrementSubsystemRefCount(SDL_INIT_SENSOR);
+                goto quit_and_error;
+            }
+        } else {
+            SDL_IncrementSubsystemRefCount(SDL_INIT_SENSOR);
+        }
+        flags_initialized |= SDL_INIT_SENSOR;
+#else
+        SDL_SetError("SDL not built with sensor support");
+        goto quit_and_error;
+#endif
+    }
+
+    (void)flags_initialized; /* make static analysis happy, since this only gets used in error cases. */
+
+    return 0;
+
+quit_and_error:
+    SDL_QuitSubSystem(flags_initialized);
+    return -1;
+}
+
+int SDL_Init(Uint32 flags)
+{
+    return SDL_InitSubSystem(flags);
+}
+
+void SDL_QuitSubSystem(Uint32 flags)
+{
+    /* Shut down requested initialized subsystems */
+#ifndef SDL_SENSOR_DISABLED
+    if (flags & SDL_INIT_SENSOR) {
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_SENSOR)) {
+            SDL_QuitSensors();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_SENSOR);
+    }
+#endif
+
+#ifndef SDL_JOYSTICK_DISABLED
+    if (flags & SDL_INIT_GAMEPAD) {
+        /* game controller implies joystick */
+        flags |= SDL_INIT_JOYSTICK;
+
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_GAMEPAD)) {
+            SDL_QuitGamepads();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_GAMEPAD);
+    }
+
+    if (flags & SDL_INIT_JOYSTICK) {
+        /* joystick implies events */
+        flags |= SDL_INIT_EVENTS;
+
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_JOYSTICK)) {
+            SDL_QuitJoysticks();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_JOYSTICK);
+    }
+#endif
+
+#ifndef SDL_HAPTIC_DISABLED
+    if (flags & SDL_INIT_HAPTIC) {
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_HAPTIC)) {
+            SDL_QuitHaptics();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_HAPTIC);
+    }
+#endif
+
+#ifndef SDL_AUDIO_DISABLED
+    if (flags & SDL_INIT_AUDIO) {
+        /* audio implies events */
+        flags |= SDL_INIT_EVENTS;
+
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_AUDIO)) {
+            SDL_QuitAudio();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_AUDIO);
+    }
+#endif
+
+#ifndef SDL_VIDEO_DISABLED
+    if (flags & SDL_INIT_VIDEO) {
+        /* video implies events */
+        flags |= SDL_INIT_EVENTS;
+
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_VIDEO)) {
+            SDL_VideoQuit();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_VIDEO);
+    }
+#endif
+
+#if !defined(SDL_TIMERS_DISABLED) && !defined(SDL_TIMER_DUMMY)
+    if (flags & SDL_INIT_TIMER) {
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_TIMER)) {
+            SDL_QuitTimers();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_TIMER);
+    }
+#endif
+
+#ifndef SDL_EVENTS_DISABLED
+    if (flags & SDL_INIT_EVENTS) {
+        if (SDL_ShouldQuitSubsystem(SDL_INIT_EVENTS)) {
+            SDL_QuitEvents();
+        }
+        SDL_DecrementSubsystemRefCount(SDL_INIT_EVENTS);
+    }
+#endif
+}
+
+Uint32 SDL_WasInit(Uint32 flags)
+{
+    int i;
+    int num_subsystems = SDL_arraysize(SDL_SubsystemRefCount);
+    Uint32 initialized = 0;
+
+    /* Fast path for checking one flag */
+    if (SDL_HasExactlyOneBitSet32(flags)) {
+        int subsystem_index = SDL_MostSignificantBitIndex32(flags);
+        return SDL_SubsystemRefCount[subsystem_index] ? flags : 0;
+    }
+
+    if (!flags) {
+        flags = SDL_INIT_EVERYTHING;
+    }
+
+    num_subsystems = SDL_min(num_subsystems, SDL_MostSignificantBitIndex32(flags) + 1);
+
+    /* Iterate over each bit in flags, and check the matching subsystem. */
+    for (i = 0; i < num_subsystems; ++i) {
+        if ((flags & 1) && SDL_SubsystemRefCount[i] > 0) {
+            initialized |= (1 << i);
+        }
+
+        flags >>= 1;
+    }
+
+    return initialized;
+}
+
+void SDL_Quit(void)
+{
+    SDL_bInMainQuit = SDL_TRUE;
+
+    /* Quit all subsystems */
+#ifdef SDL_VIDEO_DRIVER_WINDOWS
+    SDL_HelperWindowDestroy();
+#endif
+    SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
+
+#ifndef SDL_TIMERS_DISABLED
+    SDL_QuitTicks();
+#endif
+
+    SDL_ClearHints();
+    SDL_AssertionsQuit();
+
+#ifdef SDL_USE_LIBDBUS
+    SDL_DBus_Quit();
+#endif
+
+    SDL_QuitProperties();
+    SDL_QuitLog();
+
+    /* Now that every subsystem has been quit, we reset the subsystem refcount
+     * and the list of initialized subsystems.
+     */
+    SDL_memset(SDL_SubsystemRefCount, 0x0, sizeof(SDL_SubsystemRefCount));
+
+    SDL_CleanupTLS();
+
+    SDL_bInMainQuit = SDL_FALSE;
+}
+
+/* Assume we can wrap SDL_AtomicInt values and cast to Uint32 */
+SDL_COMPILE_TIME_ASSERT(sizeof_object_id, sizeof(int) == sizeof(Uint32));
+
+Uint32 SDL_GetNextObjectID(void)
+{
+    static SDL_AtomicInt last_id;
+
+    Uint32 id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
+    if (id == 0) {
+        id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
+    }
+    return id;
+}
+
+/* Get the library version number */
+int SDL_GetVersion(SDL_version *ver)
+{
+    static SDL_bool check_hint = SDL_TRUE;
+    static SDL_bool legacy_version = SDL_FALSE;
+
+    if (ver == NULL) {
+        return SDL_InvalidParamError("ver");
+    }
+
+    SDL_VERSION(ver);
+
+    if (check_hint) {
+        check_hint = SDL_FALSE;
+        legacy_version = SDL_GetHintBoolean("SDL_LEGACY_VERSION", SDL_FALSE);
+    }
+
+    if (legacy_version) {
+        /* Prior to SDL 2.24.0, the patch version was incremented with every release */
+        ver->patch = ver->minor;
+        ver->minor = 0;
+    }
+    return 0;
+}
+
+/* Get the library source revision */
+const char *SDL_GetRevision(void)
+{
+    return SDL_REVISION;
+}
+
+/* Get the name of the platform */
+const char *SDL_GetPlatform(void)
+{
+#ifdef __AIX__
+    return "AIX";
+#elif defined(__ANDROID__)
+    return "Android";
+#elif defined(__BSDI__)
+    return "BSDI";
+#elif defined(__DREAMCAST__)
+    return "Dreamcast";
+#elif defined(__EMSCRIPTEN__)
+    return "Emscripten";
+#elif defined(__FREEBSD__)
+    return "FreeBSD";
+#elif defined(__HAIKU__)
+    return "Haiku";
+#elif defined(__HPUX__)
+    return "HP-UX";
+#elif defined(__IRIX__)
+    return "Irix";
+#elif defined(__LINUX__)
+    return "Linux";
+#elif defined(__MINT__)
+    return "Atari MiNT";
+#elif defined(__MACOS__)
+    return "macOS";
+#elif defined(__NACL__)
+    return "NaCl";
+#elif defined(__NETBSD__)
+    return "NetBSD";
+#elif defined(__OPENBSD__)
+    return "OpenBSD";
+#elif defined(__OS2__)
+    return "OS/2";
+#elif defined(__OSF__)
+    return "OSF/1";
+#elif defined(__QNXNTO__)
+    return "QNX Neutrino";
+#elif defined(__RISCOS__)
+    return "RISC OS";
+#elif defined(__SOLARIS__)
+    return "Solaris";
+#elif defined(__WIN32__)
+    return "Windows";
+#elif defined(__WINRT__)
+    return "WinRT";
+#elif defined(__WINGDK__)
+    return "WinGDK";
+#elif defined(__XBOXONE__)
+    return "Xbox One";
+#elif defined(__XBOXSERIES__)
+    return "Xbox Series X|S";
+#elif defined(__IOS__)
+    return "iOS";
+#elif defined(__TVOS__)
+    return "tvOS";
+#elif defined(__PS2__)
+    return "PlayStation 2";
+#elif defined(__PSP__)
+    return "PlayStation Portable";
+#elif defined(__VITA__)
+    return "PlayStation Vita";
+#elif defined(__NGAGE__)
+    return "Nokia N-Gage";
+#elif defined(__3DS__)
+    return "Nintendo 3DS";
+#elif defined(__managarm__)
+    return "Managarm";
+#else
+    return "Unknown (see SDL_platform.h)";
+#endif
+}
+
+SDL_bool SDL_IsTablet(void)
+{
+#ifdef __ANDROID__
+    extern SDL_bool SDL_IsAndroidTablet(void);
+    return SDL_IsAndroidTablet();
+#elif defined(__IOS__)
+    extern SDL_bool SDL_IsIPad(void);
+    return SDL_IsIPad();
+#else
+    return SDL_FALSE;
+#endif
+}
+
+#ifdef __WIN32__
+
+#if (!defined(HAVE_LIBC) || defined(__WATCOMC__)) && !defined(SDL_STATIC_LIB)
+/* FIXME: Still need to include DllMain() on Watcom C ? */
+
+BOOL APIENTRY MINGW32_FORCEALIGN _DllMainCRTStartup(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
+{
+    switch (ul_reason_for_call) {
+    case DLL_PROCESS_ATTACH:
+    case DLL_THREAD_ATTACH:
+    case DLL_THREAD_DETACH:
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}
+#endif /* Building DLL */
+
+#endif /* defined(__WIN32__) || defined(__GDK__) */

vendor/sdl-3.0.0/src/SDL_assert.c

@@ -0,0 +1,453 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#if defined(__WIN32__) || defined(__GDK__)
+#include "core/windows/SDL_windows.h"
+#endif
+
+#include "SDL_assert_c.h"
+#include "video/SDL_sysvideo.h"
+
+#if defined(__WIN32__) || defined(__GDK__)
+#ifndef WS_OVERLAPPEDWINDOW
+#define WS_OVERLAPPEDWINDOW 0
+#endif
+#endif
+
+#ifdef __EMSCRIPTEN__
+    #include <emscripten.h>
+    /* older Emscriptens don't have this, but we need to for wasm64 compatibility. */
+    #ifndef MAIN_THREAD_EM_ASM_PTR
+        #ifdef __wasm64__
+            #error You need to upgrade your Emscripten compiler to support wasm64
+        #else
+            #define MAIN_THREAD_EM_ASM_PTR MAIN_THREAD_EM_ASM_INT
+        #endif
+    #endif
+#endif
+
+/* The size of the stack buffer to use for rendering assert messages. */
+#define SDL_MAX_ASSERT_MESSAGE_STACK 256
+
+static SDL_AssertState SDLCALL SDL_PromptAssertion(const SDL_AssertData *data, void *userdata);
+
+/*
+ * We keep all triggered assertions in a singly-linked list so we can
+ *  generate a report later.
+ */
+static SDL_AssertData *triggered_assertions = NULL;
+
+#ifndef SDL_THREADS_DISABLED
+static SDL_Mutex *assertion_mutex = NULL;
+#endif
+
+static SDL_AssertionHandler assertion_handler = SDL_PromptAssertion;
+static void *assertion_userdata = NULL;
+
+#ifdef __GNUC__
+static void debug_print(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
+#endif
+
+static void debug_print(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    SDL_LogMessageV(SDL_LOG_CATEGORY_ASSERT, SDL_LOG_PRIORITY_WARN, fmt, ap);
+    va_end(ap);
+}
+
+static void SDL_AddAssertionToReport(SDL_AssertData *data)
+{
+    /* (data) is always a static struct defined with the assert macros, so
+       we don't have to worry about copying or allocating them. */
+    data->trigger_count++;
+    if (data->trigger_count == 1) { /* not yet added? */
+        data->next = triggered_assertions;
+        triggered_assertions = data;
+    }
+}
+
+#if defined(__WIN32__) || defined(__GDK__)
+#define ENDLINE "\r\n"
+#else
+#define ENDLINE "\n"
+#endif
+
+static int SDL_RenderAssertMessage(char *buf, size_t buf_len, const SDL_AssertData *data)
+{
+    return SDL_snprintf(buf, buf_len,
+                        "Assertion failure at %s (%s:%d), triggered %u %s:" ENDLINE "  '%s'",
+                        data->function, data->filename, data->linenum,
+                        data->trigger_count, (data->trigger_count == 1) ? "time" : "times",
+                        data->condition);
+}
+
+static void SDL_GenerateAssertionReport(void)
+{
+    const SDL_AssertData *item = triggered_assertions;
+
+    /* only do this if the app hasn't assigned an assertion handler. */
+    if ((item != NULL) && (assertion_handler != SDL_PromptAssertion)) {
+        debug_print("\n\nSDL assertion report.\n");
+        debug_print("All SDL assertions between last init/quit:\n\n");
+
+        while (item != NULL) {
+            debug_print(
+                "'%s'\n"
+                "    * %s (%s:%d)\n"
+                "    * triggered %u time%s.\n"
+                "    * always ignore: %s.\n",
+                item->condition, item->function, item->filename,
+                item->linenum, item->trigger_count,
+                (item->trigger_count == 1) ? "" : "s",
+                item->always_ignore ? "yes" : "no");
+            item = item->next;
+        }
+        debug_print("\n");
+
+        SDL_ResetAssertionReport();
+    }
+}
+
+/* This is not declared in any header, although it is shared between some
+    parts of SDL, because we don't want anything calling it without an
+    extremely good reason. */
+#ifdef __WATCOMC__
+extern void SDL_ExitProcess(int exitcode);
+#pragma aux SDL_ExitProcess aborts;
+#endif
+extern SDL_NORETURN void SDL_ExitProcess(int exitcode);
+
+#ifdef __WATCOMC__
+static void SDL_AbortAssertion(void);
+#pragma aux SDL_AbortAssertion aborts;
+#endif
+static SDL_NORETURN void SDL_AbortAssertion(void)
+{
+    SDL_Quit();
+    SDL_ExitProcess(42);
+}
+
+static SDL_AssertState SDLCALL SDL_PromptAssertion(const SDL_AssertData *data, void *userdata)
+{
+    const char *envr;
+    SDL_AssertState state = SDL_ASSERTION_ABORT;
+    SDL_Window *window;
+    SDL_MessageBoxData messagebox;
+    SDL_MessageBoxButtonData buttons[] = {
+        { 0, SDL_ASSERTION_RETRY, "Retry" },
+        { 0, SDL_ASSERTION_BREAK, "Break" },
+        { 0, SDL_ASSERTION_ABORT, "Abort" },
+        { SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT,
+          SDL_ASSERTION_IGNORE, "Ignore" },
+        { SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT,
+          SDL_ASSERTION_ALWAYS_IGNORE, "Always Ignore" }
+    };
+    int selected;
+
+    char stack_buf[SDL_MAX_ASSERT_MESSAGE_STACK];
+    char *message = stack_buf;
+    size_t buf_len = sizeof(stack_buf);
+    int len;
+
+    (void)userdata; /* unused in default handler. */
+
+    /* Assume the output will fit... */
+    len = SDL_RenderAssertMessage(message, buf_len, data);
+
+    /* .. and if it didn't, try to allocate as much room as we actually need. */
+    if (len >= (int)buf_len) {
+        if (SDL_size_add_overflow(len, 1, &buf_len) == 0) {
+            message = (char *)SDL_malloc(buf_len);
+            if (message) {
+                len = SDL_RenderAssertMessage(message, buf_len, data);
+            } else {
+                message = stack_buf;
+            }
+        }
+    }
+
+    /* Something went very wrong */
+    if (len < 0) {
+        if (message != stack_buf) {
+            SDL_free(message);
+        }
+        return SDL_ASSERTION_ABORT;
+    }
+
+    debug_print("\n\n%s\n\n", message);
+
+    /* let env. variable override, so unit tests won't block in a GUI. */
+    envr = SDL_getenv("SDL_ASSERT");
+    if (envr != NULL) {
+        if (message != stack_buf) {
+            SDL_free(message);
+        }
+
+        if (SDL_strcmp(envr, "abort") == 0) {
+            return SDL_ASSERTION_ABORT;
+        } else if (SDL_strcmp(envr, "break") == 0) {
+            return SDL_ASSERTION_BREAK;
+        } else if (SDL_strcmp(envr, "retry") == 0) {
+            return SDL_ASSERTION_RETRY;
+        } else if (SDL_strcmp(envr, "ignore") == 0) {
+            return SDL_ASSERTION_IGNORE;
+        } else if (SDL_strcmp(envr, "always_ignore") == 0) {
+            return SDL_ASSERTION_ALWAYS_IGNORE;
+        } else {
+            return SDL_ASSERTION_ABORT; /* oh well. */
+        }
+    }
+
+    /* Leave fullscreen mode, if possible (scary!) */
+    window = SDL_GetToplevelForKeyboardFocus();
+    if (window) {
+        if (window->fullscreen_exclusive) {
+            SDL_MinimizeWindow(window);
+        } else {
+            /* !!! FIXME: ungrab the input if we're not fullscreen? */
+            /* No need to mess with the window */
+            window = NULL;
+        }
+    }
+
+    /* Show a messagebox if we can, otherwise fall back to stdio */
+    SDL_zero(messagebox);
+    messagebox.flags = SDL_MESSAGEBOX_WARNING;
+    messagebox.window = window;
+    messagebox.title = "Assertion Failed";
+    messagebox.message = message;
+    messagebox.numbuttons = SDL_arraysize(buttons);
+    messagebox.buttons = buttons;
+
+    if (SDL_ShowMessageBox(&messagebox, &selected) == 0) {
+        if (selected == -1) {
+            state = SDL_ASSERTION_IGNORE;
+        } else {
+            state = (SDL_AssertState)selected;
+        }
+    } else {
+#ifdef __EMSCRIPTEN__
+        /* This is nasty, but we can't block on a custom UI. */
+        for (;;) {
+            SDL_bool okay = SDL_TRUE;
+            /* *INDENT-OFF* */ /* clang-format off */
+            char *buf = (char *) MAIN_THREAD_EM_ASM_PTR({
+                var str =
+                    UTF8ToString($0) + '\n\n' +
+                    'Abort/Retry/Ignore/AlwaysIgnore? [ariA] :';
+                var reply = window.prompt(str, "i");
+                if (reply === null) {
+                    reply = "i";
+                }
+                return allocate(intArrayFromString(reply), 'i8', ALLOC_NORMAL);
+            }, message);
+            /* *INDENT-ON* */ /* clang-format on */
+
+            if (SDL_strcmp(buf, "a") == 0) {
+                state = SDL_ASSERTION_ABORT;
+#if 0 /* (currently) no break functionality on Emscripten */
+            } else if (SDL_strcmp(buf, "b") == 0) {
+                state = SDL_ASSERTION_BREAK;
+#endif
+            } else if (SDL_strcmp(buf, "r") == 0) {
+                state = SDL_ASSERTION_RETRY;
+            } else if (SDL_strcmp(buf, "i") == 0) {
+                state = SDL_ASSERTION_IGNORE;
+            } else if (SDL_strcmp(buf, "A") == 0) {
+                state = SDL_ASSERTION_ALWAYS_IGNORE;
+            } else {
+                okay = SDL_FALSE;
+            }
+            free(buf);  /* This should NOT be SDL_free() */
+
+            if (okay) {
+                break;
+            }
+        }
+#elif defined(HAVE_STDIO_H)
+        /* this is a little hacky. */
+        for (;;) {
+            char buf[32];
+            (void)fprintf(stderr, "Abort/Break/Retry/Ignore/AlwaysIgnore? [abriA] : ");
+            (void)fflush(stderr);
+            if (fgets(buf, sizeof(buf), stdin) == NULL) {
+                break;
+            }
+
+            if (SDL_strncmp(buf, "a", 1) == 0) {
+                state = SDL_ASSERTION_ABORT;
+                break;
+            } else if (SDL_strncmp(buf, "b", 1) == 0) {
+                state = SDL_ASSERTION_BREAK;
+                break;
+            } else if (SDL_strncmp(buf, "r", 1) == 0) {
+                state = SDL_ASSERTION_RETRY;
+                break;
+            } else if (SDL_strncmp(buf, "i", 1) == 0) {
+                state = SDL_ASSERTION_IGNORE;
+                break;
+            } else if (SDL_strncmp(buf, "A", 1) == 0) {
+                state = SDL_ASSERTION_ALWAYS_IGNORE;
+                break;
+            }
+        }
+#endif /* HAVE_STDIO_H */
+    }
+
+    /* Re-enter fullscreen mode */
+    if (window) {
+        SDL_RestoreWindow(window);
+    }
+
+    if (message != stack_buf) {
+        SDL_free(message);
+    }
+
+    return state;
+}
+
+SDL_AssertState SDL_ReportAssertion(SDL_AssertData *data, const char *func, const char *file, int line)
+{
+    SDL_AssertState state = SDL_ASSERTION_IGNORE;
+    static int assertion_running = 0;
+
+#ifndef SDL_THREADS_DISABLED
+    static SDL_SpinLock spinlock = 0;
+    SDL_AtomicLock(&spinlock);
+    if (assertion_mutex == NULL) { /* never called SDL_Init()? */
+        assertion_mutex = SDL_CreateMutex();
+        if (assertion_mutex == NULL) {
+            SDL_AtomicUnlock(&spinlock);
+            return SDL_ASSERTION_IGNORE; /* oh well, I guess. */
+        }
+    }
+    SDL_AtomicUnlock(&spinlock);
+
+    SDL_LockMutex(assertion_mutex);
+#endif /* !SDL_THREADS_DISABLED */
+
+    /* doing this because Visual C is upset over assigning in the macro. */
+    if (data->trigger_count == 0) {
+        data->function = func;
+        data->filename = file;
+        data->linenum = line;
+    }
+
+    SDL_AddAssertionToReport(data);
+
+    assertion_running++;
+    if (assertion_running > 1) { /* assert during assert! Abort. */
+        if (assertion_running == 2) {
+            SDL_AbortAssertion();
+        } else if (assertion_running == 3) { /* Abort asserted! */
+            SDL_ExitProcess(42);
+        } else {
+            while (1) { /* do nothing but spin; what else can you do?! */
+            }
+        }
+    }
+
+    if (!data->always_ignore) {
+        state = assertion_handler(data, assertion_userdata);
+    }
+
+    switch (state) {
+    case SDL_ASSERTION_ALWAYS_IGNORE:
+        state = SDL_ASSERTION_IGNORE;
+        data->always_ignore = 1;
+        break;
+
+    case SDL_ASSERTION_IGNORE:
+    case SDL_ASSERTION_RETRY:
+    case SDL_ASSERTION_BREAK:
+        break; /* macro handles these. */
+
+    case SDL_ASSERTION_ABORT:
+        SDL_AbortAssertion();
+        /*break;  ...shouldn't return, but oh well. */
+    }
+
+    assertion_running--;
+
+#ifndef SDL_THREADS_DISABLED
+    SDL_UnlockMutex(assertion_mutex);
+#endif
+
+    return state;
+}
+
+void SDL_AssertionsQuit(void)
+{
+#if SDL_ASSERT_LEVEL > 0
+    SDL_GenerateAssertionReport();
+#ifndef SDL_THREADS_DISABLED
+    if (assertion_mutex != NULL) {
+        SDL_DestroyMutex(assertion_mutex);
+        assertion_mutex = NULL;
+    }
+#endif
+#endif /* SDL_ASSERT_LEVEL > 0 */
+}
+
+void SDL_SetAssertionHandler(SDL_AssertionHandler handler, void *userdata)
+{
+    if (handler != NULL) {
+        assertion_handler = handler;
+        assertion_userdata = userdata;
+    } else {
+        assertion_handler = SDL_PromptAssertion;
+        assertion_userdata = NULL;
+    }
+}
+
+const SDL_AssertData *SDL_GetAssertionReport(void)
+{
+    return triggered_assertions;
+}
+
+void SDL_ResetAssertionReport(void)
+{
+    SDL_AssertData *next = NULL;
+    SDL_AssertData *item;
+    for (item = triggered_assertions; item != NULL; item = next) {
+        next = (SDL_AssertData *)item->next;
+        item->always_ignore = SDL_FALSE;
+        item->trigger_count = 0;
+        item->next = NULL;
+    }
+
+    triggered_assertions = NULL;
+}
+
+SDL_AssertionHandler SDL_GetDefaultAssertionHandler(void)
+{
+    return SDL_PromptAssertion;
+}
+
+SDL_AssertionHandler SDL_GetAssertionHandler(void **userdata)
+{
+    if (userdata != NULL) {
+        *userdata = assertion_userdata;
+    }
+    return assertion_handler;
+}

vendor/sdl-3.0.0/src/SDL_assert_c.h

@@ -0,0 +1,28 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_assert_c_h_
+#define SDL_assert_c_h_
+
+extern void SDL_AssertionsQuit(void);
+
+#endif /* SDL_assert_c_h_ */

vendor/sdl-3.0.0/src/SDL_error.c

@@ -0,0 +1,104 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* Simple error handling in SDL */
+
+#include "SDL_error_c.h"
+
+int SDL_SetError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    /* Ignore call if invalid format pointer was passed */
+    if (fmt != NULL) {
+        va_list ap;
+        int result;
+        SDL_error *error = SDL_GetErrBuf();
+
+        error->error = 1; /* mark error as valid */
+
+        va_start(ap, fmt);
+        result = SDL_vsnprintf(error->str, error->len, fmt, ap);
+        va_end(ap);
+
+        if (result >= 0 && (size_t)result >= error->len && error->realloc_func) {
+            size_t len = (size_t)result + 1;
+            char *str = (char *)error->realloc_func(error->str, len);
+            if (str) {
+                error->str = str;
+                error->len = len;
+                va_start(ap, fmt);
+                (void)SDL_vsnprintf(error->str, error->len, fmt, ap);
+                va_end(ap);
+            }
+        }
+
+        if (SDL_LogGetPriority(SDL_LOG_CATEGORY_ERROR) <= SDL_LOG_PRIORITY_DEBUG) {
+            /* If we are in debug mode, print out the error message */
+            SDL_LogDebug(SDL_LOG_CATEGORY_ERROR, "%s", error->str);
+        }
+    }
+
+    return -1;
+}
+
+/* Available for backwards compatibility */
+const char *SDL_GetError(void)
+{
+    const SDL_error *error = SDL_GetErrBuf();
+    return error->error ? error->str : "";
+}
+
+void SDL_ClearError(void)
+{
+    SDL_GetErrBuf()->error = 0;
+}
+
+/* Very common errors go here */
+int SDL_Error(SDL_errorcode code)
+{
+    switch (code) {
+    case SDL_ENOMEM:
+        return SDL_SetError("Out of memory");
+    case SDL_EFREAD:
+        return SDL_SetError("Error reading from datastream");
+    case SDL_EFWRITE:
+        return SDL_SetError("Error writing to datastream");
+    case SDL_EFSEEK:
+        return SDL_SetError("Error seeking in datastream");
+    case SDL_UNSUPPORTED:
+        return SDL_SetError("That operation is not supported");
+    default:
+        return SDL_SetError("Unknown SDL error");
+    }
+}
+
+char *SDL_GetErrorMsg(char *errstr, int maxlen)
+{
+    const SDL_error *error = SDL_GetErrBuf();
+
+    if (error->error) {
+        SDL_strlcpy(errstr, error->str, maxlen);
+    } else {
+        *errstr = '\0';
+    }
+
+    return errstr;
+}

vendor/sdl-3.0.0/src/SDL_error_c.h

@@ -0,0 +1,42 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* This file defines a structure that carries language-independent
+   error messages
+*/
+
+#ifndef SDL_error_c_h_
+#define SDL_error_c_h_
+
+typedef struct SDL_error
+{
+    int error; /* This is a numeric value corresponding to the current error */
+    char *str;
+    size_t len;
+    SDL_realloc_func realloc_func;
+    SDL_free_func free_func;
+} SDL_error;
+
+/* Defined in SDL_thread.c */
+extern SDL_error *SDL_GetErrBuf(void);
+
+#endif /* SDL_error_c_h_ */

vendor/sdl-3.0.0/src/SDL_guid.c

@@ -0,0 +1,92 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* convert the guid to a printable string */
+int SDL_GUIDToString(SDL_GUID guid, char *pszGUID, int cbGUID)
+{
+    static const char k_rgchHexToASCII[] = "0123456789abcdef";
+    int i;
+
+    if (pszGUID == NULL) {
+        return SDL_InvalidParamError("pszGUID");
+    }
+    if (cbGUID <= 0) {
+        return SDL_InvalidParamError("cbGUID");
+    }
+
+    for (i = 0; i < sizeof(guid.data) && i < (cbGUID - 1) / 2; i++) {
+        /* each input byte writes 2 ascii chars, and might write a null byte. */
+        /* If we don't have room for next input byte, stop */
+        unsigned char c = guid.data[i];
+
+        *pszGUID++ = k_rgchHexToASCII[c >> 4];
+        *pszGUID++ = k_rgchHexToASCII[c & 0x0F];
+    }
+    *pszGUID = '\0';
+    return 0;
+}
+
+/*-----------------------------------------------------------------------------
+ * Purpose: Returns the 4 bit nibble for a hex character
+ * Input  : c -
+ * Output : unsigned char
+ *-----------------------------------------------------------------------------*/
+static unsigned char nibble(unsigned char c)
+{
+    if ((c >= '0') && (c <= '9')) {
+        return c - '0';
+    }
+
+    if ((c >= 'A') && (c <= 'F')) {
+        return c - 'A' + 0x0a;
+    }
+
+    if ((c >= 'a') && (c <= 'f')) {
+        return c - 'a' + 0x0a;
+    }
+
+    /* received an invalid character, and no real way to return an error */
+    /* AssertMsg1(false, "Q_nibble invalid hex character '%c' ", c); */
+    return 0;
+}
+
+/* convert the string version of a guid to the struct */
+SDL_GUID SDL_GUIDFromString(const char *pchGUID)
+{
+    SDL_GUID guid;
+    int maxoutputbytes = sizeof(guid);
+    size_t len = SDL_strlen(pchGUID);
+    Uint8 *p;
+    size_t i;
+
+    /* Make sure it's even */
+    len = (len) & ~0x1;
+
+    SDL_memset(&guid, 0x00, sizeof(guid));
+
+    p = (Uint8 *)&guid;
+    for (i = 0; (i < len) && ((p - (Uint8 *)&guid) < maxoutputbytes); i += 2, p++) {
+        *p = (nibble((unsigned char)pchGUID[i]) << 4) | nibble((unsigned char)pchGUID[i + 1]);
+    }
+
+    return guid;
+}

vendor/sdl-3.0.0/src/SDL_hashtable.c

@@ -0,0 +1,276 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+#include "SDL_hashtable.h"
+
+typedef struct SDL_HashItem
+{
+    const void *key;
+    const void *value;
+    struct SDL_HashItem *next;
+} SDL_HashItem;
+
+struct SDL_HashTable
+{
+    SDL_HashItem **table;
+    Uint32 table_len;
+    SDL_bool stackable;
+    void *data;
+    SDL_HashTable_HashFn hash;
+    SDL_HashTable_KeyMatchFn keymatch;
+    SDL_HashTable_NukeFn nuke;
+};
+
+SDL_HashTable *SDL_CreateHashTable(void *data, const Uint32 num_buckets, const SDL_HashTable_HashFn hashfn,
+                                   const SDL_HashTable_KeyMatchFn keymatchfn,
+                                   const SDL_HashTable_NukeFn nukefn,
+                                   const SDL_bool stackable)
+{
+    SDL_HashTable *table;
+
+    // num_buckets must be a power of two so we get a solid block of bits to mask hash values against.
+    if ((num_buckets == 0) || ((num_buckets & (num_buckets - 1)) != 0)) {
+        SDL_SetError("num_buckets must be a power of two");
+        return NULL;
+    }
+
+    table = (SDL_HashTable *) SDL_calloc(1, sizeof (SDL_HashTable));
+    if (table == NULL) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    table->table = (SDL_HashItem **) SDL_calloc(num_buckets, sizeof (SDL_HashItem *));
+    if (table->table == NULL) {
+        SDL_free(table);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    table->table_len = num_buckets;
+    table->stackable = stackable;
+    table->data = data;
+    table->hash = hashfn;
+    table->keymatch = keymatchfn;
+    table->nuke = nukefn;
+    return table;
+}
+
+static SDL_INLINE Uint32 calc_hash(const SDL_HashTable *table, const void *key)
+{
+    return table->hash(key, table->data) & (table->table_len - 1);
+}
+
+
+SDL_bool SDL_InsertIntoHashTable(SDL_HashTable *table, const void *key, const void *value)
+{
+    SDL_HashItem *item;
+    const Uint32 hash = calc_hash(table, key);
+
+    if ( (!table->stackable) && (SDL_FindInHashTable(table, key, NULL)) ) {
+        return SDL_FALSE;
+    }
+
+    // !!! FIXME: grow and rehash table if it gets too saturated.
+    item = (SDL_HashItem *) SDL_malloc(sizeof (SDL_HashItem));
+    if (item == NULL) {
+        SDL_OutOfMemory();
+        return SDL_FALSE;
+    }
+
+    item->key = key;
+    item->value = value;
+    item->next = table->table[hash];
+    table->table[hash] = item;
+
+    return SDL_TRUE;
+}
+
+SDL_bool SDL_FindInHashTable(const SDL_HashTable *table, const void *key, const void **_value)
+{
+    const Uint32 hash = calc_hash(table, key);
+    void *data = table->data;
+    SDL_HashItem *i;
+
+    for (i = table->table[hash]; i != NULL; i = i->next) {
+        if (table->keymatch(key, i->key, data)) {
+            if (_value != NULL) {
+                *_value = i->value;
+            }
+            return SDL_TRUE;
+        }
+    }
+
+    return SDL_FALSE;
+}
+
+SDL_bool SDL_RemoveFromHashTable(SDL_HashTable *table, const void *key)
+{
+    const Uint32 hash = calc_hash(table, key);
+    SDL_HashItem *item = NULL;
+    SDL_HashItem *prev = NULL;
+    void *data = table->data;
+
+    for (item = table->table[hash]; item != NULL; item = item->next) {
+        if (table->keymatch(key, item->key, data)) {
+            if (prev != NULL) {
+                prev->next = item->next;
+            } else {
+                table->table[hash] = item->next;
+            }
+
+            table->nuke(item->key, item->value, data);
+            SDL_free(item);
+            return SDL_TRUE;
+        }
+
+        prev = item;
+    }
+
+    return SDL_FALSE;
+}
+
+SDL_bool SDL_IterateHashTableKey(const SDL_HashTable *table, const void *key, const void **_value, void **iter)
+{
+    SDL_HashItem *item = *iter ? ((SDL_HashItem *) *iter)->next : table->table[calc_hash(table, key)];
+
+    while (item != NULL) {
+        if (table->keymatch(key, item->key, table->data)) {
+            *_value = item->value;
+            *iter = item;
+            return SDL_TRUE;
+        }
+        item = item->next;
+    }
+
+    // no more matches.
+    *_value = NULL;
+    *iter = NULL;
+    return SDL_FALSE;
+}
+
+SDL_bool SDL_IterateHashTable(const SDL_HashTable *table, const void **_key, const void **_value, void **iter)
+{
+    SDL_HashItem *item = (SDL_HashItem *) *iter;
+    Uint32 idx = 0;
+
+    if (item != NULL) {
+        const SDL_HashItem *orig = item;
+        item = item->next;
+        if (item == NULL) {
+            idx = calc_hash(table, orig->key) + 1;  // !!! FIXME: we probably shouldn't rehash each time.
+        }
+    }
+
+    while (!item && (idx < table->table_len)) {
+        item = table->table[idx++];  // skip empty buckets...
+    }
+
+    if (item == NULL) {  // no more matches?
+        *_key = NULL;
+        *iter = NULL;
+        return SDL_FALSE;
+    }
+
+    *_key = item->key;
+    *_value = item->value;
+    *iter = item;
+
+    return SDL_TRUE;
+}
+
+SDL_bool SDL_HashTableEmpty(SDL_HashTable *table)
+{
+    if (table != NULL) {
+        Uint32 i;
+
+        for (i = 0; i < table->table_len; i++) {
+            SDL_HashItem *item = table->table[i];
+            if (item != NULL) {
+                return SDL_FALSE;
+            }
+        }
+    }
+    return SDL_TRUE;
+}
+
+void SDL_DestroyHashTable(SDL_HashTable *table)
+{
+    if (table != NULL) {
+        void *data = table->data;
+        Uint32 i;
+
+        for (i = 0; i < table->table_len; i++) {
+            SDL_HashItem *item = table->table[i];
+            while (item != NULL) {
+                SDL_HashItem *next = item->next;
+                table->nuke(item->key, item->value, data);
+                SDL_free(item);
+                item = next;
+            }
+        }
+
+        SDL_free(table->table);
+        SDL_free(table);
+    }
+}
+
+// this is djb's xor hashing function.
+static SDL_INLINE Uint32 hash_string_djbxor(const char *str, size_t len)
+{
+    Uint32 hash = 5381;
+    while (len--) {
+        hash = ((hash << 5) + hash) ^ *(str++);
+    }
+    return hash;
+}
+
+Uint32 SDL_HashString(const void *key, void *data)
+{
+    const char *str = (const char *)key;
+    return hash_string_djbxor(str, SDL_strlen(str));
+}
+
+SDL_bool SDL_KeyMatchString(const void *a, const void *b, void *data)
+{
+    if (a == b) {
+        return SDL_TRUE;  // same pointer, must match.
+    } else if (!a || !b) {
+        return SDL_FALSE;  // one pointer is NULL (and first test shows they aren't the same pointer), must not match.
+    }
+    return (SDL_strcmp((const char *)a, (const char *)b) == 0) ? SDL_TRUE : SDL_FALSE;  // Check against actual string contents.
+}
+
+// We assume we can fit the ID in the key directly
+SDL_COMPILE_TIME_ASSERT(SDL_HashID_KeySize, sizeof(Uint32) <= sizeof(const void *));
+
+Uint32 SDL_HashID(const void *key, void *unused)
+{
+    return (Uint32)(uintptr_t)key;
+}
+
+SDL_bool SDL_KeyMatchID(const void *a, const void *b, void *unused)
+{
+    if (a == b) {
+        return SDL_TRUE;
+    }
+    return SDL_FALSE;
+}

vendor/sdl-3.0.0/src/SDL_hashtable.h

@@ -0,0 +1,57 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_hashtable_h_
+#define SDL_hashtable_h_
+
+/* this is not (currently) a public API. But maybe it should be! */
+
+struct SDL_HashTable;
+typedef struct SDL_HashTable SDL_HashTable;
+typedef Uint32 (*SDL_HashTable_HashFn)(const void *key, void *data);
+typedef SDL_bool (*SDL_HashTable_KeyMatchFn)(const void *a, const void *b, void *data);
+typedef void (*SDL_HashTable_NukeFn)(const void *key, const void *value, void *data);
+
+SDL_HashTable *SDL_CreateHashTable(void *data,
+                                   const Uint32 num_buckets,
+                                   const SDL_HashTable_HashFn hashfn,
+                                   const SDL_HashTable_KeyMatchFn keymatchfn,
+                                   const SDL_HashTable_NukeFn nukefn,
+                                   const SDL_bool stackable);
+
+void SDL_DestroyHashTable(SDL_HashTable *table);
+SDL_bool SDL_InsertIntoHashTable(SDL_HashTable *table, const void *key, const void *value);
+SDL_bool SDL_RemoveFromHashTable(SDL_HashTable *table, const void *key);
+SDL_bool SDL_FindInHashTable(const SDL_HashTable *table, const void *key, const void **_value);
+SDL_bool SDL_HashTableEmpty(SDL_HashTable *table);
+
+// iterate all values for a specific key. This only makes sense if the hash is stackable. If not-stackable, just use SDL_FindInHashTable().
+SDL_bool SDL_IterateHashTableKey(const SDL_HashTable *table, const void *key, const void **_value, void **iter);
+
+// iterate all key/value pairs in a hash (stackable hashes can have duplicate keys with multiple values).
+SDL_bool SDL_IterateHashTable(const SDL_HashTable *table, const void **_key, const void **_value, void **iter);
+
+Uint32 SDL_HashString(const void *key, void *unused);
+SDL_bool SDL_KeyMatchString(const void *a, const void *b, void *unused);
+
+Uint32 SDL_HashID(const void *key, void *unused);
+SDL_bool SDL_KeyMatchID(const void *a, const void *b, void *unused);
+
+#endif /* SDL_hashtable_h_ */

vendor/sdl-3.0.0/src/SDL_hints.c

@@ -0,0 +1,312 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "SDL_hints_c.h"
+
+/* Assuming there aren't many hints set and they aren't being queried in
+   critical performance paths, we'll just use linked lists here.
+ */
+typedef struct SDL_HintWatch
+{
+    SDL_HintCallback callback;
+    void *userdata;
+    struct SDL_HintWatch *next;
+} SDL_HintWatch;
+
+typedef struct SDL_Hint
+{
+    char *name;
+    char *value;
+    SDL_HintPriority priority;
+    SDL_HintWatch *callbacks;
+    struct SDL_Hint *next;
+} SDL_Hint;
+
+static SDL_Hint *SDL_hints;
+
+SDL_bool SDL_SetHintWithPriority(const char *name, const char *value, SDL_HintPriority priority)
+{
+    const char *env;
+    SDL_Hint *hint;
+    SDL_HintWatch *entry;
+
+    if (name == NULL) {
+        return SDL_FALSE;
+    }
+
+    env = SDL_getenv(name);
+    if (env && priority < SDL_HINT_OVERRIDE) {
+        return SDL_FALSE;
+    }
+
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            if (priority < hint->priority) {
+                return SDL_FALSE;
+            }
+            if (hint->value != value &&
+                (value == NULL || !hint->value || SDL_strcmp(hint->value, value) != 0)) {
+                char *old_value = hint->value;
+
+                hint->value = value ? SDL_strdup(value) : NULL;
+                for (entry = hint->callbacks; entry;) {
+                    /* Save the next entry in case this one is deleted */
+                    SDL_HintWatch *next = entry->next;
+                    entry->callback(entry->userdata, name, old_value, value);
+                    entry = next;
+                }
+                if (old_value) {
+                    SDL_free(old_value);
+                }
+            }
+            hint->priority = priority;
+            return SDL_TRUE;
+        }
+    }
+
+    /* Couldn't find the hint, add a new one */
+    hint = (SDL_Hint *)SDL_malloc(sizeof(*hint));
+    if (hint == NULL) {
+        return SDL_FALSE;
+    }
+    hint->name = SDL_strdup(name);
+    hint->value = value ? SDL_strdup(value) : NULL;
+    hint->priority = priority;
+    hint->callbacks = NULL;
+    hint->next = SDL_hints;
+    SDL_hints = hint;
+    return SDL_TRUE;
+}
+
+SDL_bool SDL_ResetHint(const char *name)
+{
+    const char *env;
+    SDL_Hint *hint;
+    SDL_HintWatch *entry;
+
+    if (name == NULL) {
+        return SDL_FALSE;
+    }
+
+    env = SDL_getenv(name);
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            if ((env == NULL && hint->value != NULL) ||
+                (env != NULL && hint->value == NULL) ||
+                (env != NULL && SDL_strcmp(env, hint->value) != 0)) {
+                for (entry = hint->callbacks; entry;) {
+                    /* Save the next entry in case this one is deleted */
+                    SDL_HintWatch *next = entry->next;
+                    entry->callback(entry->userdata, name, hint->value, env);
+                    entry = next;
+                }
+            }
+            SDL_free(hint->value);
+            hint->value = NULL;
+            hint->priority = SDL_HINT_DEFAULT;
+            return SDL_TRUE;
+        }
+    }
+    return SDL_FALSE;
+}
+
+void SDL_ResetHints(void)
+{
+    const char *env;
+    SDL_Hint *hint;
+    SDL_HintWatch *entry;
+
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        env = SDL_getenv(hint->name);
+        if ((env == NULL && hint->value != NULL) ||
+            (env != NULL && hint->value == NULL) ||
+            (env != NULL && SDL_strcmp(env, hint->value) != 0)) {
+            for (entry = hint->callbacks; entry;) {
+                /* Save the next entry in case this one is deleted */
+                SDL_HintWatch *next = entry->next;
+                entry->callback(entry->userdata, hint->name, hint->value, env);
+                entry = next;
+            }
+        }
+        SDL_free(hint->value);
+        hint->value = NULL;
+        hint->priority = SDL_HINT_DEFAULT;
+    }
+}
+
+SDL_bool SDL_SetHint(const char *name, const char *value)
+{
+    return SDL_SetHintWithPriority(name, value, SDL_HINT_NORMAL);
+}
+
+const char *SDL_GetHint(const char *name)
+{
+    const char *env;
+    SDL_Hint *hint;
+
+    env = SDL_getenv(name);
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            if (env == NULL || hint->priority == SDL_HINT_OVERRIDE) {
+                return hint->value;
+            }
+            break;
+        }
+    }
+    return env;
+}
+
+int SDL_GetStringInteger(const char *value, int default_value)
+{
+    if (value == NULL || !*value) {
+        return default_value;
+    }
+    if (*value == '0' || SDL_strcasecmp(value, "false") == 0) {
+        return 0;
+    }
+    if (*value == '1' || SDL_strcasecmp(value, "true") == 0) {
+        return 1;
+    }
+    if (*value == '-' || SDL_isdigit(*value)) {
+        return SDL_atoi(value);
+    }
+    return default_value;
+}
+
+SDL_bool SDL_GetStringBoolean(const char *value, SDL_bool default_value)
+{
+    if (value == NULL || !*value) {
+        return default_value;
+    }
+    if (*value == '0' || SDL_strcasecmp(value, "false") == 0) {
+        return SDL_FALSE;
+    }
+    return SDL_TRUE;
+}
+
+SDL_bool SDL_GetHintBoolean(const char *name, SDL_bool default_value)
+{
+    const char *hint = SDL_GetHint(name);
+    return SDL_GetStringBoolean(hint, default_value);
+}
+
+int SDL_AddHintCallback(const char *name, SDL_HintCallback callback, void *userdata)
+{
+    SDL_Hint *hint;
+    SDL_HintWatch *entry;
+    const char *value;
+
+    if (name == NULL || !*name) {
+        return SDL_InvalidParamError("name");
+    }
+    if (!callback) {
+        return SDL_InvalidParamError("callback");
+    }
+
+    SDL_DelHintCallback(name, callback, userdata);
+
+    entry = (SDL_HintWatch *)SDL_malloc(sizeof(*entry));
+    if (entry == NULL) {
+        return SDL_OutOfMemory();
+    }
+    entry->callback = callback;
+    entry->userdata = userdata;
+
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            break;
+        }
+    }
+    if (hint == NULL) {
+        /* Need to add a hint entry for this watcher */
+        hint = (SDL_Hint *)SDL_malloc(sizeof(*hint));
+        if (hint == NULL) {
+            SDL_free(entry);
+            return SDL_OutOfMemory();
+        }
+        hint->name = SDL_strdup(name);
+        if (!hint->name) {
+            SDL_free(entry);
+            SDL_free(hint);
+            return SDL_OutOfMemory();
+        }
+        hint->value = NULL;
+        hint->priority = SDL_HINT_DEFAULT;
+        hint->callbacks = NULL;
+        hint->next = SDL_hints;
+        SDL_hints = hint;
+    }
+
+    /* Add it to the callbacks for this hint */
+    entry->next = hint->callbacks;
+    hint->callbacks = entry;
+
+    /* Now call it with the current value */
+    value = SDL_GetHint(name);
+    callback(userdata, name, value, value);
+    return 0;
+}
+
+void SDL_DelHintCallback(const char *name, SDL_HintCallback callback, void *userdata)
+{
+    SDL_Hint *hint;
+    SDL_HintWatch *entry, *prev;
+
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            prev = NULL;
+            for (entry = hint->callbacks; entry; entry = entry->next) {
+                if (callback == entry->callback && userdata == entry->userdata) {
+                    if (prev) {
+                        prev->next = entry->next;
+                    } else {
+                        hint->callbacks = entry->next;
+                    }
+                    SDL_free(entry);
+                    break;
+                }
+                prev = entry;
+            }
+            return;
+        }
+    }
+}
+
+void SDL_ClearHints(void)
+{
+    SDL_Hint *hint;
+    SDL_HintWatch *entry;
+
+    while (SDL_hints) {
+        hint = SDL_hints;
+        SDL_hints = hint->next;
+
+        SDL_free(hint->name);
+        SDL_free(hint->value);
+        for (entry = hint->callbacks; entry;) {
+            SDL_HintWatch *freeable = entry;
+            entry = entry->next;
+            SDL_free(freeable);
+        }
+        SDL_free(hint);
+    }
+}

vendor/sdl-3.0.0/src/SDL_hints_c.h

@@ -0,0 +1,31 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* This file defines useful function for working with SDL hints */
+
+#ifndef SDL_hints_c_h_
+#define SDL_hints_c_h_
+
+extern SDL_bool SDL_GetStringBoolean(const char *value, SDL_bool default_value);
+extern int SDL_GetStringInteger(const char *value, int default_value);
+
+#endif /* SDL_hints_c_h_ */

vendor/sdl-3.0.0/src/SDL_internal.h

@@ -0,0 +1,210 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_internal_h_
+#define SDL_internal_h_
+
+/* Many of SDL's features require _GNU_SOURCE on various platforms */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+/* Need this so Linux systems define fseek64o, ftell64o and off64_t */
+#ifndef _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE 1
+#endif
+
+/* This is for a variable-length array at the end of a struct:
+    struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
+   Use this because GCC 2 needs different magic than other compilers. */
+#if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM) || defined(__cplusplus)
+#define SDL_VARIABLE_LENGTH_ARRAY 1
+#else
+#define SDL_VARIABLE_LENGTH_ARRAY
+#endif
+
+#define SDL_MAX_SMALL_ALLOC_STACKSIZE          128
+#define SDL_small_alloc(type, count, pisstack) ((*(pisstack) = ((sizeof(type) * (count)) < SDL_MAX_SMALL_ALLOC_STACKSIZE)), (*(pisstack) ? SDL_stack_alloc(type, count) : (type *)SDL_malloc(sizeof(type) * (count))))
+#define SDL_small_free(ptr, isstack) \
+    if ((isstack)) {                 \
+        SDL_stack_free(ptr);         \
+    } else {                         \
+        SDL_free(ptr);               \
+    }
+
+#include "build_config/SDL_build_config.h"
+
+#include "dynapi/SDL_dynapi.h"
+
+#if SDL_DYNAMIC_API
+#include "dynapi/SDL_dynapi_overrides.h"
+/* force DECLSPEC off...it's all internal symbols now.
+   These will have actual #defines during SDL_dynapi.c only */
+#ifdef DECLSPEC
+#undef DECLSPEC
+#endif
+#define DECLSPEC
+#endif
+
+#ifdef __APPLE__
+#ifndef _DARWIN_C_SOURCE
+#define _DARWIN_C_SOURCE 1 /* for memset_pattern4() */
+#endif
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#elif defined(HAVE_MALLOC_H)
+#include <malloc.h>
+#endif
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+#ifdef HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+#ifdef HAVE_STRING_H
+#ifdef HAVE_MEMORY_H
+#include <memory.h>
+#endif
+#include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#ifdef HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#elif defined(HAVE_STDINT_H)
+#include <stdint.h>
+#endif
+#ifdef HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+#ifdef HAVE_MATH_H
+#include <math.h>
+#endif
+#ifdef HAVE_FLOAT_H
+#include <float.h>
+#endif
+
+/* If you run into a warning that O_CLOEXEC is redefined, update the SDL configuration header for your platform to add HAVE_O_CLOEXEC */
+#ifndef HAVE_O_CLOEXEC
+#define O_CLOEXEC 0
+#endif
+
+/* A few #defines to reduce SDL footprint.
+   Only effective when library is statically linked.
+   You have to manually edit this file. */
+#ifndef SDL_LEAN_AND_MEAN
+#define SDL_LEAN_AND_MEAN 0
+#endif
+
+/* Optimized functions from 'SDL_blit_0.c'
+   - blit with source BitsPerPixel < 8, palette */
+#ifndef SDL_HAVE_BLIT_0
+#define SDL_HAVE_BLIT_0 !SDL_LEAN_AND_MEAN
+#endif
+
+/* Optimized functions from 'SDL_blit_1.c'
+   - blit with source BytesPerPixel == 1, palette */
+#ifndef SDL_HAVE_BLIT_1
+#define SDL_HAVE_BLIT_1 !SDL_LEAN_AND_MEAN
+#endif
+
+/* Optimized functions from 'SDL_blit_A.c'
+   - blit with 'SDL_BLENDMODE_BLEND' blending mode */
+#ifndef SDL_HAVE_BLIT_A
+#define SDL_HAVE_BLIT_A !SDL_LEAN_AND_MEAN
+#endif
+
+/* Optimized functions from 'SDL_blit_N.c'
+   - blit with COLORKEY mode, or nothing */
+#ifndef SDL_HAVE_BLIT_N
+#define SDL_HAVE_BLIT_N !SDL_LEAN_AND_MEAN
+#endif
+
+/* Optimized functions from 'SDL_blit_N.c'
+   - RGB565 conversion with Lookup tables */
+#ifndef SDL_HAVE_BLIT_N_RGB565
+#define SDL_HAVE_BLIT_N_RGB565 !SDL_LEAN_AND_MEAN
+#endif
+
+/* Optimized functions from 'SDL_blit_AUTO.c'
+   - blit with modulate color, modulate alpha, any blending mode
+   - scaling or not */
+#ifndef SDL_HAVE_BLIT_AUTO
+#define SDL_HAVE_BLIT_AUTO !SDL_LEAN_AND_MEAN
+#endif
+
+/* Run-Length-Encoding
+   - SDL_SetSurfaceColorKey() called with SDL_RLEACCEL flag */
+#ifndef SDL_HAVE_RLE
+#define SDL_HAVE_RLE !SDL_LEAN_AND_MEAN
+#endif
+
+/* Software SDL_Renderer
+   - creation of software renderer
+   - *not* general blitting functions
+   - {blend,draw}{fillrect,line,point} internal functions */
+#ifndef SDL_VIDEO_RENDER_SW
+#define SDL_VIDEO_RENDER_SW !SDL_LEAN_AND_MEAN
+#endif
+
+/* YUV formats
+   - handling of YUV surfaces
+   - blitting and conversion functions */
+#ifndef SDL_HAVE_YUV
+#define SDL_HAVE_YUV !SDL_LEAN_AND_MEAN
+#endif
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_intrin.h>
+
+#define SDL_MAIN_NOIMPL /* don't drag in header-only implementation of SDL_main */
+#include <SDL3/SDL_main.h>
+
+/* The internal implementations of these functions have up to nanosecond precision.
+   We can expose these functions as part of the API if we want to later.
+*/
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern DECLSPEC Uint32 SDLCALL SDL_GetNextObjectID(void);
+extern DECLSPEC int SDLCALL SDL_WaitSemaphoreTimeoutNS(SDL_Semaphore *sem, Sint64 timeoutNS);
+extern DECLSPEC int SDLCALL SDL_WaitConditionTimeoutNS(SDL_Condition *cond, SDL_Mutex *mutex, Sint64 timeoutNS);
+extern DECLSPEC int SDLCALL SDL_WaitEventTimeoutNS(SDL_Event *event, Sint64 timeoutNS);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SDL_internal_h_ */

vendor/sdl-3.0.0/src/SDL_list.c

@@ -0,0 +1,86 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "./SDL_list.h"
+
+/* Push */
+int SDL_ListAdd(SDL_ListNode **head, void *ent)
+{
+    SDL_ListNode *node = SDL_malloc(sizeof(*node));
+
+    if (node == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    node->entry = ent;
+    node->next = *head;
+    *head = node;
+    return 0;
+}
+
+/* Pop from end as a FIFO (if add with SDL_ListAdd) */
+void SDL_ListPop(SDL_ListNode **head, void **ent)
+{
+    SDL_ListNode **ptr = head;
+
+    /* Invalid or empty */
+    if (head == NULL || *head == NULL) {
+        return;
+    }
+
+    while ((*ptr)->next) {
+        ptr = &(*ptr)->next;
+    }
+
+    if (ent) {
+        *ent = (*ptr)->entry;
+    }
+
+    SDL_free(*ptr);
+    *ptr = NULL;
+}
+
+void SDL_ListRemove(SDL_ListNode **head, void *ent)
+{
+    SDL_ListNode **ptr = head;
+
+    while (*ptr) {
+        if ((*ptr)->entry == ent) {
+            SDL_ListNode *tmp = *ptr;
+            *ptr = (*ptr)->next;
+            SDL_free(tmp);
+            return;
+        }
+        ptr = &(*ptr)->next;
+    }
+}
+
+void SDL_ListClear(SDL_ListNode **head)
+{
+    SDL_ListNode *l = *head;
+    *head = NULL;
+    while (l) {
+        SDL_ListNode *tmp = l;
+        l = l->next;
+        SDL_free(tmp);
+    }
+}

vendor/sdl-3.0.0/src/SDL_list.h

@@ -0,0 +1,36 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_list_h_
+#define SDL_list_h_
+
+typedef struct SDL_ListNode
+{
+    void *entry;
+    struct SDL_ListNode *next;
+} SDL_ListNode;
+
+int SDL_ListAdd(SDL_ListNode **head, void *ent);
+void SDL_ListPop(SDL_ListNode **head, void **ent);
+void SDL_ListRemove(SDL_ListNode **head, void *ent);
+void SDL_ListClear(SDL_ListNode **head);
+
+#endif /* SDL_list_h_ */

vendor/sdl-3.0.0/src/SDL_log.c

@@ -0,0 +1,506 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#if defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__)
+#include "core/windows/SDL_windows.h"
+#endif
+
+/* Simple log messages in SDL */
+
+#include "SDL_log_c.h"
+
+#ifdef HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#ifdef __ANDROID__
+#include <android/log.h>
+#endif
+
+#include "stdlib/SDL_vacopy.h"
+
+/* The size of the stack buffer to use for rendering log messages. */
+#define SDL_MAX_LOG_MESSAGE_STACK 256
+
+#define DEFAULT_PRIORITY             SDL_LOG_PRIORITY_ERROR
+#define DEFAULT_ASSERT_PRIORITY      SDL_LOG_PRIORITY_WARN
+#define DEFAULT_APPLICATION_PRIORITY SDL_LOG_PRIORITY_INFO
+#define DEFAULT_TEST_PRIORITY        SDL_LOG_PRIORITY_VERBOSE
+
+typedef struct SDL_LogLevel
+{
+    int category;
+    SDL_LogPriority priority;
+    struct SDL_LogLevel *next;
+} SDL_LogLevel;
+
+/* The default log output function */
+static void SDLCALL SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority, const char *message);
+
+static SDL_LogLevel *SDL_loglevels;
+static SDL_LogPriority SDL_default_priority = DEFAULT_PRIORITY;
+static SDL_LogPriority SDL_assert_priority = DEFAULT_ASSERT_PRIORITY;
+static SDL_LogPriority SDL_application_priority = DEFAULT_APPLICATION_PRIORITY;
+static SDL_LogPriority SDL_test_priority = DEFAULT_TEST_PRIORITY;
+static SDL_LogOutputFunction SDL_log_function = SDL_LogOutput;
+static void *SDL_log_userdata = NULL;
+static SDL_Mutex *log_function_mutex = NULL;
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#endif
+
+static const char *SDL_priority_prefixes[SDL_NUM_LOG_PRIORITIES] = {
+    NULL,
+    "VERBOSE",
+    "DEBUG",
+    "INFO",
+    "WARN",
+    "ERROR",
+    "CRITICAL"
+};
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+#ifdef __ANDROID__
+static const char *SDL_category_prefixes[] = {
+    "APP",
+    "ERROR",
+    "ASSERT",
+    "SYSTEM",
+    "AUDIO",
+    "VIDEO",
+    "RENDER",
+    "INPUT",
+    "TEST"
+};
+
+SDL_COMPILE_TIME_ASSERT(category_prefixes_enum, SDL_TABLESIZE(SDL_category_prefixes) == SDL_LOG_CATEGORY_RESERVED1);
+
+static int SDL_android_priority[SDL_NUM_LOG_PRIORITIES] = {
+    ANDROID_LOG_UNKNOWN,
+    ANDROID_LOG_VERBOSE,
+    ANDROID_LOG_DEBUG,
+    ANDROID_LOG_INFO,
+    ANDROID_LOG_WARN,
+    ANDROID_LOG_ERROR,
+    ANDROID_LOG_FATAL
+};
+#endif /* __ANDROID__ */
+
+void SDL_InitLog(void)
+{
+    if (log_function_mutex == NULL) {
+        /* if this fails we'll try to continue without it. */
+        log_function_mutex = SDL_CreateMutex();
+    }
+}
+
+void SDL_QuitLog(void)
+{
+    SDL_LogResetPriorities();
+    if (log_function_mutex) {
+        SDL_DestroyMutex(log_function_mutex);
+        log_function_mutex = NULL;
+    }
+}
+
+void SDL_LogSetAllPriority(SDL_LogPriority priority)
+{
+    SDL_LogLevel *entry;
+
+    for (entry = SDL_loglevels; entry; entry = entry->next) {
+        entry->priority = priority;
+    }
+    SDL_default_priority = priority;
+    SDL_assert_priority = priority;
+    SDL_application_priority = priority;
+}
+
+void SDL_LogSetPriority(int category, SDL_LogPriority priority)
+{
+    SDL_LogLevel *entry;
+
+    for (entry = SDL_loglevels; entry; entry = entry->next) {
+        if (entry->category == category) {
+            entry->priority = priority;
+            return;
+        }
+    }
+
+    /* Create a new entry */
+    entry = (SDL_LogLevel *)SDL_malloc(sizeof(*entry));
+    if (entry) {
+        entry->category = category;
+        entry->priority = priority;
+        entry->next = SDL_loglevels;
+        SDL_loglevels = entry;
+    }
+}
+
+SDL_LogPriority SDL_LogGetPriority(int category)
+{
+    SDL_LogLevel *entry;
+
+    for (entry = SDL_loglevels; entry; entry = entry->next) {
+        if (entry->category == category) {
+            return entry->priority;
+        }
+    }
+
+    if (category == SDL_LOG_CATEGORY_TEST) {
+        return SDL_test_priority;
+    } else if (category == SDL_LOG_CATEGORY_APPLICATION) {
+        return SDL_application_priority;
+    } else if (category == SDL_LOG_CATEGORY_ASSERT) {
+        return SDL_assert_priority;
+    } else {
+        return SDL_default_priority;
+    }
+}
+
+void SDL_LogResetPriorities(void)
+{
+    SDL_LogLevel *entry;
+
+    while (SDL_loglevels) {
+        entry = SDL_loglevels;
+        SDL_loglevels = entry->next;
+        SDL_free(entry);
+    }
+
+    SDL_default_priority = DEFAULT_PRIORITY;
+    SDL_assert_priority = DEFAULT_ASSERT_PRIORITY;
+    SDL_application_priority = DEFAULT_APPLICATION_PRIORITY;
+    SDL_test_priority = DEFAULT_TEST_PRIORITY;
+}
+
+void SDL_Log(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogVerbose(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_VERBOSE, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogDebug(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_DEBUG, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogInfo(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_INFO, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogWarn(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_WARN, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogError(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_ERROR, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogCritical(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, SDL_LOG_PRIORITY_CRITICAL, fmt, ap);
+    va_end(ap);
+}
+
+void SDL_LogMessage(int category, SDL_LogPriority priority, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    SDL_LogMessageV(category, priority, fmt, ap);
+    va_end(ap);
+}
+
+#ifdef __ANDROID__
+static const char *GetCategoryPrefix(int category)
+{
+    if (category < SDL_LOG_CATEGORY_RESERVED1) {
+        return SDL_category_prefixes[category];
+    }
+    if (category < SDL_LOG_CATEGORY_CUSTOM) {
+        return "RESERVED";
+    }
+    return "CUSTOM";
+}
+#endif /* __ANDROID__ */
+
+void SDL_LogMessageV(int category, SDL_LogPriority priority, const char *fmt, va_list ap)
+{
+    char *message = NULL;
+    char stack_buf[SDL_MAX_LOG_MESSAGE_STACK];
+    size_t len_plus_term;
+    int len;
+    va_list aq;
+
+    /* Nothing to do if we don't have an output function */
+    if (!SDL_log_function) {
+        return;
+    }
+
+    /* Make sure we don't exceed array bounds */
+    if ((int)priority < 0 || priority >= SDL_NUM_LOG_PRIORITIES) {
+        return;
+    }
+
+    /* See if we want to do anything with this message */
+    if (priority < SDL_LogGetPriority(category)) {
+        return;
+    }
+
+    if (log_function_mutex == NULL) {
+        /* this mutex creation can race if you log from two threads at startup. You should have called SDL_Init first! */
+        log_function_mutex = SDL_CreateMutex();
+    }
+
+    /* Render into stack buffer */
+    va_copy(aq, ap);
+    len = SDL_vsnprintf(stack_buf, sizeof(stack_buf), fmt, aq);
+    va_end(aq);
+
+    if (len < 0) {
+        return;
+    }
+
+    /* If message truncated, allocate and re-render */
+    if (len >= sizeof(stack_buf) && SDL_size_add_overflow(len, 1, &len_plus_term) == 0) {
+        /* Allocate exactly what we need, including the zero-terminator */
+        message = (char *)SDL_malloc(len_plus_term);
+        if (message == NULL) {
+            return;
+        }
+        va_copy(aq, ap);
+        len = SDL_vsnprintf(message, len_plus_term, fmt, aq);
+        va_end(aq);
+    } else {
+        message = stack_buf;
+    }
+
+    /* Chop off final endline. */
+    if ((len > 0) && (message[len - 1] == '\n')) {
+        message[--len] = '\0';
+        if ((len > 0) && (message[len - 1] == '\r')) { /* catch "\r\n", too. */
+            message[--len] = '\0';
+        }
+    }
+
+    SDL_LockMutex(log_function_mutex);
+    SDL_log_function(SDL_log_userdata, category, priority, message);
+    SDL_UnlockMutex(log_function_mutex);
+
+    /* Free only if dynamically allocated */
+    if (message != stack_buf) {
+        SDL_free(message);
+    }
+}
+
+#if defined(__WIN32__) && !defined(HAVE_STDIO_H) && !defined(__WINRT__) && !defined(__GDK__)
+/* Flag tracking the attachment of the console: 0=unattached, 1=attached to a console, 2=attached to a file, -1=error */
+static int consoleAttached = 0;
+
+/* Handle to stderr output of console. */
+static HANDLE stderrHandle = NULL;
+#endif
+
+static void SDLCALL SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
+                                  const char *message)
+{
+#if defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__)
+    /* Way too many allocations here, urgh */
+    /* Note: One can't call SDL_SetError here, since that function itself logs. */
+    {
+        char *output;
+        size_t length;
+        LPTSTR tstr;
+        SDL_bool isstack;
+
+#if !defined(HAVE_STDIO_H) && !defined(__WINRT__) && !defined(__GDK__)
+        BOOL attachResult;
+        DWORD attachError;
+        DWORD charsWritten;
+        DWORD consoleMode;
+
+        /* Maybe attach console and get stderr handle */
+        if (consoleAttached == 0) {
+            attachResult = AttachConsole(ATTACH_PARENT_PROCESS);
+            if (!attachResult) {
+                attachError = GetLastError();
+                if (attachError == ERROR_INVALID_HANDLE) {
+                    /* This is expected when running from Visual Studio */
+                    /*OutputDebugString(TEXT("Parent process has no console\r\n"));*/
+                    consoleAttached = -1;
+                } else if (attachError == ERROR_GEN_FAILURE) {
+                    OutputDebugString(TEXT("Could not attach to console of parent process\r\n"));
+                    consoleAttached = -1;
+                } else if (attachError == ERROR_ACCESS_DENIED) {
+                    /* Already attached */
+                    consoleAttached = 1;
+                } else {
+                    OutputDebugString(TEXT("Error attaching console\r\n"));
+                    consoleAttached = -1;
+                }
+            } else {
+                /* Newly attached */
+                consoleAttached = 1;
+            }
+
+            if (consoleAttached == 1) {
+                stderrHandle = GetStdHandle(STD_ERROR_HANDLE);
+
+                if (GetConsoleMode(stderrHandle, &consoleMode) == 0) {
+                    /* WriteConsole fails if the output is redirected to a file. Must use WriteFile instead. */
+                    consoleAttached = 2;
+                }
+            }
+        }
+#endif /* !defined(HAVE_STDIO_H) && !defined(__WINRT__) && !defined(__GDK__) */
+
+        length = SDL_strlen(SDL_priority_prefixes[priority]) + 2 + SDL_strlen(message) + 1 + 1 + 1;
+        output = SDL_small_alloc(char, length, &isstack);
+        (void)SDL_snprintf(output, length, "%s: %s\r\n", SDL_priority_prefixes[priority], message);
+        tstr = WIN_UTF8ToString(output);
+
+        /* Output to debugger */
+        OutputDebugString(tstr);
+
+#if !defined(HAVE_STDIO_H) && !defined(__WINRT__) && !defined(__GDK__)
+        /* Screen output to stderr, if console was attached. */
+        if (consoleAttached == 1) {
+            if (!WriteConsole(stderrHandle, tstr, (DWORD)SDL_tcslen(tstr), &charsWritten, NULL)) {
+                OutputDebugString(TEXT("Error calling WriteConsole\r\n"));
+                if (GetLastError() == ERROR_NOT_ENOUGH_MEMORY) {
+                    OutputDebugString(TEXT("Insufficient heap memory to write message\r\n"));
+                }
+            }
+
+        } else if (consoleAttached == 2) {
+            if (!WriteFile(stderrHandle, output, (DWORD)SDL_strlen(output), &charsWritten, NULL)) {
+                OutputDebugString(TEXT("Error calling WriteFile\r\n"));
+            }
+        }
+#endif /* !defined(HAVE_STDIO_H) && !defined(__WINRT__) && !defined(__GDK__) */
+
+        SDL_free(tstr);
+        SDL_small_free(output, isstack);
+    }
+#elif defined(__ANDROID__)
+    {
+        char tag[32];
+
+        SDL_snprintf(tag, SDL_arraysize(tag), "SDL/%s", GetCategoryPrefix(category));
+        __android_log_write(SDL_android_priority[priority], tag, message);
+    }
+#elif defined(__APPLE__) && (defined(SDL_VIDEO_DRIVER_COCOA) || defined(SDL_VIDEO_DRIVER_UIKIT))
+    /* Technically we don't need Cocoa/UIKit, but that's where this function is defined for now.
+     */
+    extern void SDL_NSLog(const char *prefix, const char *text);
+    {
+        SDL_NSLog(SDL_priority_prefixes[priority], message);
+        return;
+    }
+#elif defined(__PSP__) || defined(__PS2__)
+    {
+        FILE *pFile;
+        pFile = fopen("SDL_Log.txt", "a");
+        if (pFile != NULL) {
+            (void)fprintf(pFile, "%s: %s\n", SDL_priority_prefixes[priority], message);
+            (void)fclose(pFile);
+        }
+    }
+#elif defined(__VITA__)
+    {
+        FILE *pFile;
+        pFile = fopen("ux0:/data/SDL_Log.txt", "a");
+        if (pFile != NULL) {
+            (void)fprintf(pFile, "%s: %s\n", SDL_priority_prefixes[priority], message);
+            (void)fclose(pFile);
+        }
+    }
+#elif defined(__3DS__)
+    {
+        FILE *pFile;
+        pFile = fopen("sdmc:/3ds/SDL_Log.txt", "a");
+        if (pFile != NULL) {
+            (void)fprintf(pFile, "%s: %s\n", SDL_priority_prefixes[priority], message);
+            (void)fclose(pFile);
+        }
+    }
+#endif
+#if defined(HAVE_STDIO_H) && \
+    !(defined(__APPLE__) && (defined(SDL_VIDEO_DRIVER_COCOA) || defined(SDL_VIDEO_DRIVER_UIKIT)))
+    (void)fprintf(stderr, "%s: %s\n", SDL_priority_prefixes[priority], message);
+#endif
+}
+
+void SDL_LogGetOutputFunction(SDL_LogOutputFunction *callback, void **userdata)
+{
+    if (callback) {
+        *callback = SDL_log_function;
+    }
+    if (userdata) {
+        *userdata = SDL_log_userdata;
+    }
+}
+
+void SDL_LogSetOutputFunction(SDL_LogOutputFunction callback, void *userdata)
+{
+    SDL_log_function = callback;
+    SDL_log_userdata = userdata;
+}

vendor/sdl-3.0.0/src/SDL_log_c.h

@@ -0,0 +1,31 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* This file defines useful function for working with SDL logging */
+
+#ifndef SDL_log_c_h_
+#define SDL_log_c_h_
+
+extern void SDL_InitLog(void);
+extern void SDL_QuitLog(void);
+
+#endif /* SDL_log_c_h_ */

vendor/sdl-3.0.0/src/SDL_properties.c

@@ -0,0 +1,289 @@
+/*
+  Simple DiretMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+#include "SDL_hashtable.h"
+#include "SDL_properties_c.h"
+
+
+typedef struct
+{
+    void *value;
+    void (SDLCALL *cleanup)(void *userdata, void *value);
+    void *userdata;
+} SDL_Property;
+
+typedef struct
+{
+    SDL_HashTable *props;
+    SDL_Mutex *lock;
+} SDL_Properties;
+
+static SDL_HashTable *SDL_properties;
+static SDL_RWLock *SDL_properties_lock;
+static SDL_PropertiesID SDL_last_properties_id;
+
+
+static void SDL_FreeProperty(const void *key, const void *value, void *data)
+{
+    SDL_Property *property = (SDL_Property *)value;
+    if (property->cleanup) {
+        property->cleanup(property->userdata, property->value);
+    }
+    SDL_free((void *)key);
+    SDL_free((void *)value);
+}
+
+static void SDL_FreeProperties(const void *key, const void *value, void *data)
+{
+    SDL_Properties *properties = (SDL_Properties *)value;
+    if (properties) {
+        if (properties->props) {
+            SDL_DestroyHashTable(properties->props);
+            properties->props = NULL;
+        }
+        if (properties->lock) {
+            SDL_DestroyMutex(properties->lock);
+            properties->lock = NULL;
+        }
+        SDL_free(properties);
+    }
+}
+
+int SDL_InitProperties(void)
+{
+    if (!SDL_properties_lock) {
+        SDL_properties_lock = SDL_CreateRWLock();
+        if (!SDL_properties_lock) {
+            return -1;
+        }
+    }
+    if (!SDL_properties) {
+        SDL_properties = SDL_CreateHashTable(NULL, 16, SDL_HashID, SDL_KeyMatchID, SDL_FreeProperties, SDL_FALSE);
+        if (!SDL_properties) {
+            return -1;
+        }
+    }
+    return 0;
+}
+
+void SDL_QuitProperties(void)
+{
+    if (SDL_properties) {
+        SDL_DestroyHashTable(SDL_properties);
+        SDL_properties = NULL;
+    }
+    if (SDL_properties_lock) {
+        SDL_DestroyRWLock(SDL_properties_lock);
+        SDL_properties_lock = NULL;
+    }
+}
+
+SDL_PropertiesID SDL_CreateProperties(void)
+{
+    SDL_PropertiesID props = 0;
+    SDL_Properties *properties = NULL;
+    SDL_bool inserted = SDL_FALSE;
+
+    if (!SDL_properties && SDL_InitProperties() < 0) {
+        return 0;
+    }
+
+    properties = SDL_malloc(sizeof(*properties));
+    if (!properties) {
+        goto error;
+    }
+    properties->props = SDL_CreateHashTable(NULL, 4, SDL_HashString, SDL_KeyMatchString, SDL_FreeProperty, SDL_FALSE);
+    if (!properties->props) {
+        goto error;
+    }
+    properties->lock = SDL_CreateMutex();
+    if (!properties->lock) {
+        goto error;
+    }
+
+    if (SDL_InitProperties() < 0) {
+        goto error;
+    }
+
+    SDL_LockRWLockForWriting(SDL_properties_lock);
+    ++SDL_last_properties_id;
+    if (SDL_last_properties_id == 0) {
+        ++SDL_last_properties_id;
+    }
+    props = SDL_last_properties_id;
+    if (SDL_InsertIntoHashTable(SDL_properties, (const void *)(uintptr_t)props, properties)) {
+        inserted = SDL_TRUE;
+    }
+    SDL_UnlockRWLock(SDL_properties_lock);
+
+    if (inserted) {
+        /* All done! */
+        return props;
+    }
+
+error:
+    SDL_FreeProperties(NULL, properties, NULL);
+    return 0;
+}
+
+int SDL_LockProperties(SDL_PropertiesID props)
+{
+    SDL_Properties *properties = NULL;
+
+    if (!props) {
+        return SDL_InvalidParamError("props");
+    }
+
+    SDL_LockRWLockForReading(SDL_properties_lock);
+    SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)props, (const void **)&properties);
+    SDL_UnlockRWLock(SDL_properties_lock);
+
+    if (!properties) {
+        return SDL_InvalidParamError("props");
+    }
+
+    SDL_LockMutex(properties->lock);
+    return 0;
+}
+
+void SDL_UnlockProperties(SDL_PropertiesID props)
+{
+    SDL_Properties *properties = NULL;
+
+    if (!props) {
+        return;
+    }
+
+    SDL_LockRWLockForReading(SDL_properties_lock);
+    SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)props, (const void **)&properties);
+    SDL_UnlockRWLock(SDL_properties_lock);
+
+    if (!properties) {
+        return;
+    }
+
+    SDL_UnlockMutex(properties->lock);
+}
+
+int SDL_SetProperty(SDL_PropertiesID props, const char *name, void *value, void (SDLCALL *cleanup)(void *userdata, void *value), void *userdata)
+{
+    SDL_Properties *properties = NULL;
+    SDL_Property *property = NULL;
+    int result = 0;
+
+    if (!props) {
+        return SDL_InvalidParamError("props");
+    }
+    if (!name || !*name) {
+        return SDL_InvalidParamError("name");
+    }
+
+    SDL_LockRWLockForReading(SDL_properties_lock);
+    SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)props, (const void **)&properties);
+    SDL_UnlockRWLock(SDL_properties_lock);
+
+    if (!properties) {
+        return SDL_InvalidParamError("props");
+    }
+
+    if (value) {
+        property = (SDL_Property *)SDL_malloc(sizeof(*property));
+        if (!property) {
+            return SDL_OutOfMemory();
+        }
+
+        property->value = value;
+        property->cleanup = cleanup;
+        property->userdata = userdata;
+    }
+
+    SDL_LockMutex(properties->lock);
+    {
+        SDL_RemoveFromHashTable(properties->props, name);
+        if (property) {
+            char *key = SDL_strdup(name);
+            if (!SDL_InsertIntoHashTable(properties->props, key, property)) {
+                SDL_FreeProperty(key, property, NULL);
+                result = -1;
+            }
+        }
+    }
+    SDL_UnlockMutex(properties->lock);
+
+    return result;
+}
+
+void *SDL_GetProperty(SDL_PropertiesID props, const char *name)
+{
+    SDL_Properties *properties = NULL;
+    void *value = NULL;
+
+    if (!props) {
+        SDL_InvalidParamError("props");
+        return NULL;
+    }
+    if (!name || !*name) {
+        SDL_InvalidParamError("name");
+        return NULL;
+    }
+
+    SDL_LockRWLockForReading(SDL_properties_lock);
+    SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)props, (const void **)&properties);
+    SDL_UnlockRWLock(SDL_properties_lock);
+
+    if (!properties) {
+        SDL_InvalidParamError("props");
+        return NULL;
+    }
+
+    /* Note that taking the lock here only guarantees that we won't read the
+     * hashtable while it's being modified. The value itself can easily be
+     * freed from another thread after it is returned here.
+     */
+    SDL_LockMutex(properties->lock);
+    {
+        SDL_Property *property = NULL;
+        if (SDL_FindInHashTable(properties->props, name, (const void **)&property)) {
+            value = property->value;
+        } else {
+            SDL_SetError("Couldn't find property named %s", name);
+        }
+    }
+    SDL_UnlockMutex(properties->lock);
+
+    return value;
+}
+
+int SDL_ClearProperty(SDL_PropertiesID props, const char *name)
+{
+    return SDL_SetProperty(props, name, NULL, NULL, NULL);
+}
+
+void SDL_DestroyProperties(SDL_PropertiesID props)
+{
+    if (!props) {
+        return;
+    }
+
+    SDL_LockRWLockForWriting(SDL_properties_lock);
+    SDL_RemoveFromHashTable(SDL_properties, (const void *)(uintptr_t)props);
+    SDL_UnlockRWLock(SDL_properties_lock);
+}

vendor/sdl-3.0.0/src/SDL_properties_c.h

@@ -0,0 +1,23 @@
+/*
+  Simple DiretMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+extern int SDL_InitProperties(void);
+extern void SDL_QuitProperties(void);

vendor/sdl-3.0.0/src/SDL_utils.c

@@ -0,0 +1,63 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "SDL_utils_c.h"
+
+/* Common utility functions that aren't in the public API */
+
+int SDL_powerof2(int x)
+{
+    int value;
+
+    if (x <= 0) {
+        /* Return some sane value - we shouldn't hit this in our use cases */
+        return 1;
+    }
+
+    /* This trick works for 32-bit values */
+    {
+        SDL_COMPILE_TIME_ASSERT(SDL_powerof2, sizeof(x) == sizeof(Uint32));
+    }
+    value = x;
+    value -= 1;
+    value |= value >> 1;
+    value |= value >> 2;
+    value |= value >> 4;
+    value |= value >> 8;
+    value |= value >> 16;
+    value += 1;
+
+    return value;
+}
+
+SDL_bool SDL_endswith(const char *string, const char *suffix)
+{
+    size_t string_length = string ? SDL_strlen(string) : 0;
+    size_t suffix_length = suffix ? SDL_strlen(suffix) : 0;
+
+    if (suffix_length > 0 && suffix_length <= string_length) {
+        if (SDL_memcmp(string + string_length - suffix_length, suffix, suffix_length) == 0) {
+            return SDL_TRUE;
+        }
+    }
+    return SDL_FALSE;
+}

vendor/sdl-3.0.0/src/SDL_utils_c.h

@@ -0,0 +1,33 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_utils_h_
+#define SDL_utils_h_
+
+/* Common utility functions that aren't in the public API */
+
+/* Return the smallest power of 2 greater than or equal to 'x' */
+extern int SDL_powerof2(int x);
+
+SDL_bool SDL_endswith(const char *string, const char *suffix);
+
+#endif /* SDL_utils_h_ */

vendor/sdl-3.0.0/src/atomic/SDL_atomic.c

@@ -0,0 +1,301 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1900)
+#include <intrin.h>
+#define HAVE_MSC_ATOMICS 1
+#endif
+
+#ifdef __MACOS__ /* !!! FIXME: should we favor gcc atomics? */
+#include <libkern/OSAtomic.h>
+#endif
+
+#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
+#include <atomic.h>
+#endif
+
+/* The __atomic_load_n() intrinsic showed up in different times for different compilers. */
+#ifdef __clang__
+#if __has_builtin(__atomic_load_n) || defined(HAVE_GCC_ATOMICS)
+/* !!! FIXME: this advertises as available in the NDK but uses an external symbol we don't have.
+   It might be in a later NDK or we might need an extra library? --ryan. */
+#ifndef __ANDROID__
+#define HAVE_ATOMIC_LOAD_N 1
+#endif
+#endif
+#elif defined(__GNUC__)
+#if (__GNUC__ >= 5)
+#define HAVE_ATOMIC_LOAD_N 1
+#endif
+#endif
+
+/* *INDENT-OFF* */ /* clang-format off */
+#if defined(__WATCOMC__) && defined(__386__)
+SDL_COMPILE_TIME_ASSERT(intsize, 4==sizeof(int));
+#define HAVE_WATCOM_ATOMICS
+extern __inline int _SDL_xchg_watcom(volatile int *a, int v);
+#pragma aux _SDL_xchg_watcom = \
+  "lock xchg [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+
+extern __inline unsigned char _SDL_cmpxchg_watcom(volatile int *a, int newval, int oldval);
+#pragma aux _SDL_cmpxchg_watcom = \
+  "lock cmpxchg [edx], ecx" \
+  "setz al" \
+  parm [edx] [ecx] [eax] \
+  value [al] \
+  modify exact [eax];
+
+extern __inline int _SDL_xadd_watcom(volatile int *a, int v);
+#pragma aux _SDL_xadd_watcom = \
+  "lock xadd [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+
+#endif /* __WATCOMC__ && __386__ */
+/* *INDENT-ON* */ /* clang-format on */
+
+/*
+  If any of the operations are not provided then we must emulate some
+  of them. That means we need a nice implementation of spin locks
+  that avoids the "one big lock" problem. We use a vector of spin
+  locks and pick which one to use based on the address of the operand
+  of the function.
+
+  To generate the index of the lock we first shift by 3 bits to get
+  rid on the zero bits that result from 32 and 64 bit alignment of
+  data. We then mask off all but 5 bits and use those 5 bits as an
+  index into the table.
+
+  Picking the lock this way insures that accesses to the same data at
+  the same time will go to the same lock. OTOH, accesses to different
+  data have only a 1/32 chance of hitting the same lock. That should
+  pretty much eliminate the chances of several atomic operations on
+  different data from waiting on the same "big lock". If it isn't
+  then the table of locks can be expanded to a new size so long as
+  the new size is a power of two.
+
+  Contributed by Bob Pendleton, bob@pendleton.com
+*/
+
+#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOS__) && !defined(__SOLARIS__) && !defined(HAVE_WATCOM_ATOMICS)
+#define EMULATE_CAS 1
+#endif
+
+#ifdef EMULATE_CAS
+static SDL_SpinLock locks[32];
+
+static SDL_INLINE void enterLock(void *a)
+{
+    uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
+
+    SDL_AtomicLock(&locks[index]);
+}
+
+static SDL_INLINE void leaveLock(void *a)
+{
+    uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
+
+    SDL_AtomicUnlock(&locks[index]);
+}
+#endif
+
+SDL_bool SDL_AtomicCAS(SDL_AtomicInt *a, int oldval, int newval)
+{
+#ifdef HAVE_MSC_ATOMICS
+    SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(long) == sizeof(a->value));
+    return _InterlockedCompareExchange((long *)&a->value, (long)newval, (long)oldval) == (long)oldval;
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (SDL_bool)_SDL_cmpxchg_watcom(&a->value, newval, oldval);
+#elif defined(HAVE_GCC_ATOMICS)
+    return (SDL_bool)__sync_bool_compare_and_swap(&a->value, oldval, newval);
+#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool)OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
+#elif defined(__SOLARIS__)
+    return (SDL_bool)((int)atomic_cas_uint((volatile uint_t *)&a->value, (uint_t)oldval, (uint_t)newval) == oldval);
+#elif defined(EMULATE_CAS)
+    SDL_bool retval = SDL_FALSE;
+
+    enterLock(a);
+    if (a->value == oldval) {
+        a->value = newval;
+        retval = SDL_TRUE;
+    }
+    leaveLock(a);
+
+    return retval;
+#else
+#error Please define your platform.
+#endif
+}
+
+SDL_bool SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
+{
+#ifdef HAVE_MSC_ATOMICS
+    return _InterlockedCompareExchangePointer(a, newval, oldval) == oldval;
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (SDL_bool)_SDL_cmpxchg_watcom((int *)a, (long)newval, (long)oldval);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_bool_compare_and_swap(a, oldval, newval);
+#elif defined(__MACOS__) && defined(__LP64__)  /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool)OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t *)a);
+#elif defined(__MACOS__) && !defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool)OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t *)a);
+#elif defined(__SOLARIS__)
+    return (SDL_bool)(atomic_cas_ptr(a, oldval, newval) == oldval);
+#elif defined(EMULATE_CAS)
+    SDL_bool retval = SDL_FALSE;
+
+    enterLock(a);
+    if (*a == oldval) {
+        *a = newval;
+        retval = SDL_TRUE;
+    }
+    leaveLock(a);
+
+    return retval;
+#else
+#error Please define your platform.
+#endif
+}
+
+int SDL_AtomicSet(SDL_AtomicInt *a, int v)
+{
+#ifdef HAVE_MSC_ATOMICS
+    SDL_COMPILE_TIME_ASSERT(atomic_set, sizeof(long) == sizeof(a->value));
+    return _InterlockedExchange((long *)&a->value, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return _SDL_xchg_watcom(&a->value, v);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_lock_test_and_set(&a->value, v);
+#elif defined(__SOLARIS__)
+    return (int)atomic_swap_uint((volatile uint_t *)&a->value, v);
+#else
+    int value;
+    do {
+        value = a->value;
+    } while (!SDL_AtomicCAS(a, value, v));
+    return value;
+#endif
+}
+
+void *SDL_AtomicSetPtr(void **a, void *v)
+{
+#ifdef HAVE_MSC_ATOMICS
+    return _InterlockedExchangePointer(a, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (void *)_SDL_xchg_watcom((int *)a, (long)v);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_lock_test_and_set(a, v);
+#elif defined(__SOLARIS__)
+    return atomic_swap_ptr(a, v);
+#else
+    void *value;
+    do {
+        value = *a;
+    } while (!SDL_AtomicCASPtr(a, value, v));
+    return value;
+#endif
+}
+
+int SDL_AtomicAdd(SDL_AtomicInt *a, int v)
+{
+#ifdef HAVE_MSC_ATOMICS
+    SDL_COMPILE_TIME_ASSERT(atomic_add, sizeof(long) == sizeof(a->value));
+    return _InterlockedExchangeAdd((long *)&a->value, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return _SDL_xadd_watcom(&a->value, v);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_fetch_and_add(&a->value, v);
+#elif defined(__SOLARIS__)
+    int pv = a->value;
+    membar_consumer();
+    atomic_add_int((volatile uint_t *)&a->value, v);
+    return pv;
+#else
+    int value;
+    do {
+        value = a->value;
+    } while (!SDL_AtomicCAS(a, value, (value + v)));
+    return value;
+#endif
+}
+
+int SDL_AtomicGet(SDL_AtomicInt *a)
+{
+#ifdef HAVE_ATOMIC_LOAD_N
+    return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
+#elif defined(HAVE_MSC_ATOMICS)
+    SDL_COMPILE_TIME_ASSERT(atomic_get, sizeof(long) == sizeof(a->value));
+    return _InterlockedOr((long *)&a->value, 0);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return _SDL_xadd_watcom(&a->value, 0);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_or_and_fetch(&a->value, 0);
+#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return sizeof(a->value) == sizeof(uint32_t) ? OSAtomicOr32Barrier(0, (volatile uint32_t *)&a->value) : OSAtomicAdd64Barrier(0, (volatile int64_t *)&a->value);
+#elif defined(__SOLARIS__)
+    return atomic_or_uint((volatile uint_t *)&a->value, 0);
+#else
+    int value;
+    do {
+        value = a->value;
+    } while (!SDL_AtomicCAS(a, value, value));
+    return value;
+#endif
+}
+
+void *SDL_AtomicGetPtr(void **a)
+{
+#ifdef HAVE_ATOMIC_LOAD_N
+    return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+#elif defined(HAVE_MSC_ATOMICS)
+    return _InterlockedCompareExchangePointer(a, NULL, NULL);
+#elif defined(HAVE_GCC_ATOMICS)
+    return __sync_val_compare_and_swap(a, (void *)0, (void *)0);
+#elif defined(__SOLARIS__)
+    return atomic_cas_ptr(a, (void *)0, (void *)0);
+#else
+    void *value;
+    do {
+        value = *a;
+    } while (!SDL_AtomicCASPtr(a, value, value));
+    return value;
+#endif
+}
+
+#ifdef SDL_MEMORY_BARRIER_USES_FUNCTION
+#error This file should be built in arm mode so the mcr instruction is available for memory barriers
+#endif
+
+void SDL_MemoryBarrierReleaseFunction(void)
+{
+    SDL_MemoryBarrierRelease();
+}
+
+void SDL_MemoryBarrierAcquireFunction(void)
+{
+    SDL_MemoryBarrierAcquire();
+}

vendor/sdl-3.0.0/src/atomic/SDL_spinlock.c

@@ -0,0 +1,207 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#if defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__)
+#include "../core/windows/SDL_windows.h"
+#endif
+
+#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
+#include <atomic.h>
+#endif
+
+#if !defined(HAVE_GCC_ATOMICS) && defined(__RISCOS__)
+#include <unixlib/local.h>
+#endif
+
+#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
+#include <xmmintrin.h>
+#endif
+
+#ifdef PS2
+#include <kernel.h>
+#endif
+
+#if !defined(HAVE_GCC_ATOMICS) && defined(__MACOS__)
+#include <libkern/OSAtomic.h>
+#endif
+
+/* *INDENT-OFF* */ /* clang-format off */
+#if defined(__WATCOMC__) && defined(__386__)
+SDL_COMPILE_TIME_ASSERT(locksize, 4==sizeof(SDL_SpinLock));
+extern __inline int _SDL_xchg_watcom(volatile int *a, int v);
+#pragma aux _SDL_xchg_watcom = \
+  "lock xchg [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+#endif /* __WATCOMC__ && __386__ */
+/* *INDENT-ON* */ /* clang-format on */
+
+/* This function is where all the magic happens... */
+SDL_bool SDL_AtomicTryLock(SDL_SpinLock *lock)
+{
+#ifdef SDL_ATOMIC_DISABLED
+    /* Terrible terrible damage */
+    static SDL_Mutex *_spinlock_mutex;
+
+    if (_spinlock_mutex == NULL) {
+        /* Race condition on first lock... */
+        _spinlock_mutex = SDL_CreateMutex();
+    }
+    SDL_LockMutex(_spinlock_mutex);
+    if (*lock == 0) {
+        *lock = 1;
+        SDL_UnlockMutex(_spinlock_mutex);
+        return SDL_TRUE;
+    } else {
+        SDL_UnlockMutex(_spinlock_mutex);
+        return SDL_FALSE;
+    }
+
+#elif defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
+    return __sync_lock_test_and_set(lock, 1) == 0;
+
+#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
+    return _InterlockedExchange_acq(lock, 1) == 0;
+
+#elif defined(_MSC_VER)
+    SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
+    return InterlockedExchange((long *)lock, 1) == 0;
+
+#elif defined(__WATCOMC__) && defined(__386__)
+    return _SDL_xchg_watcom(lock, 1) == 0;
+
+#elif defined(__GNUC__) && defined(__arm__) &&               \
+    (defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__) ||  \
+     defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) ||  \
+     defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5TE__) || \
+     defined(__ARM_ARCH_5TEJ__))
+    int result;
+
+#ifdef __RISCOS__
+    if (__cpucap_have_rex()) {
+        __asm__ __volatile__(
+            "ldrex %0, [%2]\nteq   %0, #0\nstrexeq %0, %1, [%2]"
+            : "=&r"(result)
+            : "r"(1), "r"(lock)
+            : "cc", "memory");
+        return result == 0;
+    }
+#endif
+
+    __asm__ __volatile__(
+        "swp %0, %1, [%2]\n"
+        : "=&r,&r"(result)
+        : "r,0"(1), "r,r"(lock)
+        : "memory");
+    return result == 0;
+
+#elif defined(__GNUC__) && defined(__arm__)
+    int result;
+    __asm__ __volatile__(
+        "ldrex %0, [%2]\nteq   %0, #0\nstrexeq %0, %1, [%2]"
+        : "=&r"(result)
+        : "r"(1), "r"(lock)
+        : "cc", "memory");
+    return result == 0;
+
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+    int result;
+    __asm__ __volatile__(
+        "lock ; xchgl %0, (%1)\n"
+        : "=r"(result)
+        : "r"(lock), "0"(1)
+        : "cc", "memory");
+    return result == 0;
+
+#elif defined(__MACOS__) || defined(__IOS__) || defined(__TVOS__)
+    /* Maybe used for PowerPC, but the Intel asm or gcc atomics are favored. */
+    return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
+
+#elif defined(__SOLARIS__) && defined(_LP64)
+    /* Used for Solaris with non-gcc compilers. */
+    return (SDL_bool)((int)atomic_cas_64((volatile uint64_t *)lock, 0, 1) == 0);
+
+#elif defined(__SOLARIS__) && !defined(_LP64)
+    /* Used for Solaris with non-gcc compilers. */
+    return (SDL_bool)((int)atomic_cas_32((volatile uint32_t *)lock, 0, 1) == 0);
+#elif defined(PS2)
+    uint32_t oldintr;
+    SDL_bool res = SDL_FALSE;
+    // disable interuption
+    oldintr = DIntr();
+
+    if (*lock == 0) {
+        *lock = 1;
+        res = SDL_TRUE;
+    }
+    // enable interuption
+    if (oldintr) {
+        EIntr();
+    }
+    return res;
+#else
+#error Please implement for your platform.
+    return SDL_FALSE;
+#endif
+}
+
+void SDL_AtomicLock(SDL_SpinLock *lock)
+{
+    int iterations = 0;
+    /* FIXME: Should we have an eventual timeout? */
+    while (!SDL_AtomicTryLock(lock)) {
+        if (iterations < 32) {
+            iterations++;
+            SDL_CPUPauseInstruction();
+        } else {
+            /* !!! FIXME: this doesn't definitely give up the current timeslice, it does different things on various platforms. */
+            SDL_Delay(0);
+        }
+    }
+}
+
+void SDL_AtomicUnlock(SDL_SpinLock *lock)
+{
+#if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
+    __sync_lock_release(lock);
+
+#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
+    _InterlockedExchange_rel(lock, 0);
+
+#elif defined(_MSC_VER)
+    _ReadWriteBarrier();
+    *lock = 0;
+
+#elif defined(__WATCOMC__) && defined(__386__)
+    SDL_CompilerBarrier();
+    *lock = 0;
+
+#elif defined(__SOLARIS__)
+    /* Used for Solaris when not using gcc. */
+    *lock = 0;
+    membar_producer();
+
+#else
+    *lock = 0;
+#endif
+}

vendor/sdl-3.0.0/src/audio/SDL_audio_c.h

@@ -0,0 +1,27 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_audio_c_h_
+#define SDL_audio_c_h_
+
+extern void SDL_UpdateAudio(void);
+
+#endif /* SDL_audio_c_h_ */

vendor/sdl-3.0.0/src/audio/SDL_audio_resampler_filter.h

@@ -0,0 +1,544 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+// DO NOT EDIT, THIS FILE WAS GENERATED BY build-scripts/gen_audio_resampler_filter.c
+
+#define RESAMPLER_ZERO_CROSSINGS 5
+#define RESAMPLER_BITS_PER_SAMPLE 16
+#define RESAMPLER_BITS_PER_ZERO_CROSSING ((RESAMPLER_BITS_PER_SAMPLE / 2) + 1)
+#define RESAMPLER_SAMPLES_PER_ZERO_CROSSING (1 << RESAMPLER_BITS_PER_ZERO_CROSSING)
+#define RESAMPLER_FILTER_SIZE (RESAMPLER_SAMPLES_PER_ZERO_CROSSING * RESAMPLER_ZERO_CROSSINGS)
+
+static const float ResamplerFilter[RESAMPLER_FILTER_SIZE] = {
+     1.000000000f, 0.000000000f,-0.000000000f, 0.000000000f,-0.000000000f,
+     0.999993165f,-0.001679888f, 0.000529080f,-0.000151513f, 0.000027455f,
+     0.999972661f,-0.003351212f, 0.001055794f,-0.000302183f, 0.000054683f,
+     0.999938488f,-0.005013955f, 0.001580128f,-0.000452009f, 0.000081685f,
+     0.999890647f,-0.006668099f, 0.002102071f,-0.000600987f, 0.000108459f,
+     0.999829139f,-0.008313629f, 0.002621611f,-0.000749115f, 0.000135007f,
+     0.999753966f,-0.009950528f, 0.003138734f,-0.000896389f, 0.000161328f,
+     0.999665131f,-0.011578779f, 0.003653429f,-0.001042807f, 0.000187423f,
+     0.999562634f,-0.013198368f, 0.004165684f,-0.001188367f, 0.000213291f,
+     0.999446480f,-0.014809279f, 0.004675488f,-0.001333066f, 0.000238933f,
+     0.999316672f,-0.016411497f, 0.005182828f,-0.001476901f, 0.000264348f,
+     0.999173212f,-0.018005007f, 0.005687694f,-0.001619871f, 0.000289537f,
+     0.999016105f,-0.019589795f, 0.006190074f,-0.001761971f, 0.000314501f,
+     0.998845356f,-0.021165846f, 0.006689957f,-0.001903201f, 0.000339239f,
+     0.998660968f,-0.022733147f, 0.007187332f,-0.002043558f, 0.000363751f,
+     0.998462946f,-0.024291684f, 0.007682189f,-0.002183039f, 0.000388037f,
+     0.998251297f,-0.025841443f, 0.008174516f,-0.002321643f, 0.000412099f,
+     0.998026026f,-0.027382413f, 0.008664303f,-0.002459367f, 0.000435935f,
+     0.997787138f,-0.028914579f, 0.009151540f,-0.002596209f, 0.000459547f,
+     0.997534641f,-0.030437930f, 0.009636217f,-0.002732167f, 0.000482934f,
+     0.997268542f,-0.031952453f, 0.010118324f,-0.002867240f, 0.000506097f,
+     0.996988847f,-0.033458137f, 0.010597850f,-0.003001425f, 0.000529036f,
+     0.996695563f,-0.034954970f, 0.011074786f,-0.003134721f, 0.000551752f,
+     0.996388700f,-0.036442941f, 0.011549123f,-0.003267125f, 0.000574244f,
+     0.996068266f,-0.037922039f, 0.012020851f,-0.003398637f, 0.000596512f,
+     0.995734268f,-0.039392253f, 0.012489961f,-0.003529253f, 0.000618558f,
+     0.995386717f,-0.040853574f, 0.012956443f,-0.003658973f, 0.000640382f,
+     0.995025621f,-0.042305990f, 0.013420290f,-0.003787796f, 0.000661984f,
+     0.994650990f,-0.043749493f, 0.013881491f,-0.003915718f, 0.000683363f,
+     0.994262835f,-0.045184072f, 0.014340039f,-0.004042740f, 0.000704522f,
+     0.993861166f,-0.046609719f, 0.014795924f,-0.004168860f, 0.000725459f,
+     0.993445994f,-0.048026424f, 0.015249139f,-0.004294075f, 0.000746176f,
+     0.993017331f,-0.049434180f, 0.015699676f,-0.004418386f, 0.000766672f,
+     0.992575187f,-0.050832978f, 0.016147525f,-0.004541790f, 0.000786949f,
+     0.992119574f,-0.052222809f, 0.016592680f,-0.004664287f, 0.000807006f,
+     0.991650506f,-0.053603666f, 0.017035133f,-0.004785875f, 0.000826844f,
+     0.991167995f,-0.054975543f, 0.017474875f,-0.004906553f, 0.000846464f,
+     0.990672054f,-0.056338431f, 0.017911900f,-0.005026320f, 0.000865865f,
+     0.990162696f,-0.057692323f, 0.018346201f,-0.005145175f, 0.000885049f,
+     0.989639935f,-0.059037214f, 0.018777770f,-0.005263117f, 0.000904016f,
+     0.989103786f,-0.060373097f, 0.019206599f,-0.005380146f, 0.000922766f,
+     0.988554262f,-0.061699966f, 0.019632684f,-0.005496260f, 0.000941300f,
+     0.987991380f,-0.063017815f, 0.020056015f,-0.005611458f, 0.000959619f,
+     0.987415153f,-0.064326639f, 0.020476588f,-0.005725741f, 0.000977722f,
+     0.986825598f,-0.065626433f, 0.020894396f,-0.005839106f, 0.000995611f,
+     0.986222730f,-0.066917192f, 0.021309432f,-0.005951554f, 0.001013285f,
+     0.985606567f,-0.068198912f, 0.021721690f,-0.006063084f, 0.001030746f,
+     0.984977124f,-0.069471588f, 0.022131165f,-0.006173695f, 0.001047994f,
+     0.984334418f,-0.070735217f, 0.022537850f,-0.006283387f, 0.001065030f,
+     0.983678468f,-0.071989794f, 0.022941741f,-0.006392159f, 0.001081853f,
+     0.983009290f,-0.073235317f, 0.023342830f,-0.006500011f, 0.001098466f,
+     0.982326903f,-0.074471782f, 0.023741114f,-0.006606943f, 0.001114868f,
+     0.981631326f,-0.075699186f, 0.024136587f,-0.006712954f, 0.001131059f,
+     0.980922577f,-0.076917527f, 0.024529243f,-0.006818044f, 0.001147042f,
+     0.980200675f,-0.078126804f, 0.024919078f,-0.006922213f, 0.001162815f,
+     0.979465640f,-0.079327013f, 0.025306087f,-0.007025460f, 0.001178380f,
+     0.978717491f,-0.080518153f, 0.025690266f,-0.007127786f, 0.001193738f,
+     0.977956250f,-0.081700223f, 0.026071609f,-0.007229191f, 0.001208889f,
+     0.977181936f,-0.082873221f, 0.026450113f,-0.007329674f, 0.001223833f,
+     0.976394570f,-0.084037148f, 0.026825773f,-0.007429235f, 0.001238572f,
+     0.975594175f,-0.085192002f, 0.027198586f,-0.007527875f, 0.001253106f,
+     0.974780770f,-0.086337783f, 0.027568547f,-0.007625593f, 0.001267436f,
+     0.973954379f,-0.087474491f, 0.027935652f,-0.007722391f, 0.001281562f,
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+     0.133099362f,-0.040686254f, 0.012062150f,-0.002386425f, 0.000140824f,
+     0.130893398f,-0.040034383f, 0.011863409f,-0.002344301f, 0.000137620f,
+     0.128694148f,-0.039383657f, 0.011665175f,-0.002302370f, 0.000134453f,
+     0.126501649f,-0.038734100f, 0.011467454f,-0.002260631f, 0.000131323f,
+     0.124315937f,-0.038085735f, 0.011270254f,-0.002219088f, 0.000128229f,
+     0.122137048f,-0.037438584f, 0.011073581f,-0.002177740f, 0.000125171f,
+     0.119965018f,-0.036792671f, 0.010877441f,-0.002136588f, 0.000122150f,
+     0.117799883f,-0.036148017f, 0.010681842f,-0.002095634f, 0.000119165f,
+     0.115641679f,-0.035504644f, 0.010486791f,-0.002054878f, 0.000116216f,
+     0.113490439f,-0.034862575f, 0.010292293f,-0.002014322f, 0.000113304f,
+     0.111346199f,-0.034221832f, 0.010098355f,-0.001973967f, 0.000110427f,
+     0.109208994f,-0.033582436f, 0.009904984f,-0.001933813f, 0.000107585f,
+     0.107078857f,-0.032944409f, 0.009712186f,-0.001893861f, 0.000104780f,
+     0.104955823f,-0.032307773f, 0.009519967f,-0.001854112f, 0.000102010f,
+     0.102839925f,-0.031672548f, 0.009328334f,-0.001814568f, 0.000099275f,
+     0.100731196f,-0.031038757f, 0.009137293f,-0.001775228f, 0.000096576f,
+     0.098629671f,-0.030406420f, 0.008946849f,-0.001736095f, 0.000093911f,
+     0.096535380f,-0.029775558f, 0.008757010f,-0.001697168f, 0.000091282f,
+     0.094448358f,-0.029146192f, 0.008567781f,-0.001658448f, 0.000088688f,
+     0.092368636f,-0.028518343f, 0.008379168f,-0.001619937f, 0.000086128f,
+     0.090296247f,-0.027892030f, 0.008191177f,-0.001581635f, 0.000083603f,
+     0.088231221f,-0.027267275f, 0.008003813f,-0.001543542f, 0.000081113f,
+     0.086173591f,-0.026644097f, 0.007817084f,-0.001505661f, 0.000078656f,
+     0.084123388f,-0.026022517f, 0.007630993f,-0.001467990f, 0.000076234f,
+     0.082080642f,-0.025402554f, 0.007445548f,-0.001430532f, 0.000073846f,
+     0.080045384f,-0.024784228f, 0.007260753f,-0.001393286f, 0.000071492f,
+     0.078017645f,-0.024167559f, 0.007076615f,-0.001356254f, 0.000069172f,
+     0.075997454f,-0.023552566f, 0.006893138f,-0.001319435f, 0.000066885f,
+     0.073984841f,-0.022939269f, 0.006710328f,-0.001282832f, 0.000064632f,
+     0.071979836f,-0.022327686f, 0.006528191f,-0.001246443f, 0.000062412f,
+     0.069982467f,-0.021717836f, 0.006346731f,-0.001210271f, 0.000060225f,
+     0.067992764f,-0.021109739f, 0.006165955f,-0.001174315f, 0.000058072f,
+     0.066010755f,-0.020503413f, 0.005985866f,-0.001138576f, 0.000055951f,
+     0.064036468f,-0.019898876f, 0.005806472f,-0.001103055f, 0.000053862f,
+     0.062069932f,-0.019296147f, 0.005627775f,-0.001067751f, 0.000051807f,
+     0.060111174f,-0.018695244f, 0.005449782f,-0.001032667f, 0.000049783f,
+     0.058160222f,-0.018096185f, 0.005272497f,-0.000997801f, 0.000047792f,
+     0.056217102f,-0.017498988f, 0.005095926f,-0.000963156f, 0.000045833f,
+     0.054281842f,-0.016903671f, 0.004920073f,-0.000928730f, 0.000043905f,
+     0.052354468f,-0.016310251f, 0.004744943f,-0.000894525f, 0.000042010f,
+     0.050435006f,-0.015718746f, 0.004570540f,-0.000860541f, 0.000040146f,
+     0.048523483f,-0.015129173f, 0.004396870f,-0.000826779f, 0.000038313f,
+     0.046619924f,-0.014541549f, 0.004223937f,-0.000793238f, 0.000036511f,
+     0.044724355f,-0.013955892f, 0.004051745f,-0.000759920f, 0.000034740f,
+     0.042836800f,-0.013372217f, 0.003880299f,-0.000726824f, 0.000033000f,
+     0.040957285f,-0.012790543f, 0.003709604f,-0.000693951f, 0.000031291f,
+     0.039085833f,-0.012210884f, 0.003539663f,-0.000661301f, 0.000029612f,
+     0.037222470f,-0.011633259f, 0.003370481f,-0.000628876f, 0.000027964f,
+     0.035367219f,-0.011057682f, 0.003202062f,-0.000596674f, 0.000026345f,
+     0.033520103f,-0.010484170f, 0.003034411f,-0.000564696f, 0.000024756f,
+     0.031681147f,-0.009912739f, 0.002867532f,-0.000532943f, 0.000023197f,
+     0.029850373f,-0.009343404f, 0.002701428f,-0.000501414f, 0.000021668f,
+     0.028027804f,-0.008776182f, 0.002536104f,-0.000470111f, 0.000020168f,
+     0.026213462f,-0.008211087f, 0.002371564f,-0.000439032f, 0.000018697f,
+     0.024407370f,-0.007648135f, 0.002207811f,-0.000408180f, 0.000017255f,
+     0.022609549f,-0.007087341f, 0.002044849f,-0.000377553f, 0.000015842f,
+     0.020820021f,-0.006528720f, 0.001882682f,-0.000347151f, 0.000014457f,
+     0.019038808f,-0.005972286f, 0.001721315f,-0.000316976f, 0.000013101f,
+     0.017265930f,-0.005418056f, 0.001560750f,-0.000287027f, 0.000011773f,
+     0.015501408f,-0.004866042f, 0.001400991f,-0.000257305f, 0.000010473f,
+     0.013745262f,-0.004316260f, 0.001242041f,-0.000227808f, 0.000009201f,
+     0.011997513f,-0.003768723f, 0.001083905f,-0.000198539f, 0.000007956f,
+     0.010258180f,-0.003223445f, 0.000926585f,-0.000169495f, 0.000006739f,
+     0.008527283f,-0.002680442f, 0.000770086f,-0.000140679f, 0.000005549f,
+     0.006804842f,-0.002139725f, 0.000614409f,-0.000112090f, 0.000004386f,
+     0.005090874f,-0.001601309f, 0.000459559f,-0.000083727f, 0.000003250f,
+     0.003385399f,-0.001065208f, 0.000305539f,-0.000055591f, 0.000002140f,
+     0.001688435f,-0.000531434f, 0.000152351f,-0.000027682f, 0.000001057f,
+};
+

vendor/sdl-3.0.0/src/audio/SDL_audiodev.c

@@ -0,0 +1,125 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+// Get the name of the audio device we use for output
+
+#if defined(SDL_AUDIO_DRIVER_NETBSD) || defined(SDL_AUDIO_DRIVER_OSS)
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h> // For close()
+
+#include "SDL_audiodev_c.h"
+
+#ifndef SDL_PATH_DEV_DSP
+#if defined(__NETBSD__) || defined(__OPENBSD__)
+#define SDL_PATH_DEV_DSP "/dev/audio"
+#else
+#define SDL_PATH_DEV_DSP "/dev/dsp"
+#endif
+#endif
+#ifndef SDL_PATH_DEV_DSP24
+#define SDL_PATH_DEV_DSP24 "/dev/sound/dsp"
+#endif
+#ifndef SDL_PATH_DEV_AUDIO
+#define SDL_PATH_DEV_AUDIO "/dev/audio"
+#endif
+
+static void test_device(const SDL_bool iscapture, const char *fname, int flags, SDL_bool (*test)(int fd))
+{
+    struct stat sb;
+    if ((stat(fname, &sb) == 0) && (S_ISCHR(sb.st_mode))) {
+        const int audio_fd = open(fname, flags | O_CLOEXEC, 0);
+        if (audio_fd >= 0) {
+            const SDL_bool okay = test(audio_fd);
+            close(audio_fd);
+            if (okay) {
+                static size_t dummyhandle = 0;
+                dummyhandle++;
+                SDL_assert(dummyhandle != 0);
+
+                /* Note that spec is NULL; while we are opening the device
+                 * endpoint here, the endpoint does not provide any mix format
+                 * information,  making this information inaccessible at
+                 * enumeration time
+                 */
+                SDL_AddAudioDevice(iscapture, fname, NULL, (void *)(uintptr_t)dummyhandle);
+            }
+        }
+    }
+}
+
+static SDL_bool test_stub(int fd)
+{
+    return SDL_TRUE;
+}
+
+static void SDL_EnumUnixAudioDevices_Internal(const SDL_bool iscapture, const SDL_bool classic, SDL_bool (*test)(int))
+{
+    const int flags = iscapture ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT;
+    const char *audiodev;
+    char audiopath[1024];
+
+    if (test == NULL) {
+        test = test_stub;
+    }
+
+    // Figure out what our audio device is
+    audiodev = SDL_getenv("SDL_PATH_DSP");
+    if (audiodev == NULL) {
+        audiodev = SDL_getenv("AUDIODEV");
+    }
+    if (audiodev == NULL) {
+        if (classic) {
+            audiodev = SDL_PATH_DEV_AUDIO;
+        } else {
+            struct stat sb;
+
+            // Added support for /dev/sound/\* in Linux 2.4
+            if (((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode)) && ((stat(SDL_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(sb.st_mode))) {
+                audiodev = SDL_PATH_DEV_DSP24;
+            } else {
+                audiodev = SDL_PATH_DEV_DSP;
+            }
+        }
+    }
+    test_device(iscapture, audiodev, flags, test);
+
+    if (SDL_strlen(audiodev) < (sizeof(audiopath) - 3)) {
+        int instance = 0;
+        while (instance <= 64) {
+            (void)SDL_snprintf(audiopath, SDL_arraysize(audiopath),
+                               "%s%d", audiodev, instance);
+            instance++;
+            test_device(iscapture, audiopath, flags, test);
+        }
+    }
+}
+
+void SDL_EnumUnixAudioDevices(const SDL_bool classic, SDL_bool (*test)(int))
+{
+    SDL_EnumUnixAudioDevices_Internal(SDL_TRUE, classic, test);
+    SDL_EnumUnixAudioDevices_Internal(SDL_FALSE, classic, test);
+}
+
+#endif // Audio device selection

vendor/sdl-3.0.0/src/audio/SDL_audiodev_c.h

@@ -0,0 +1,41 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_audiodev_c_h_
+#define SDL_audiodev_c_h_
+
+#include "SDL_internal.h"
+#include "SDL_sysaudio.h"
+
+// Open the audio device for playback, and don't block if busy
+//#define USE_BLOCKING_WRITES
+
+#ifdef USE_BLOCKING_WRITES
+#define OPEN_FLAGS_OUTPUT O_WRONLY
+#define OPEN_FLAGS_INPUT  O_RDONLY
+#else
+#define OPEN_FLAGS_OUTPUT (O_WRONLY | O_NONBLOCK)
+#define OPEN_FLAGS_INPUT  (O_RDONLY | O_NONBLOCK)
+#endif
+
+extern void SDL_EnumUnixAudioDevices(const SDL_bool classic, SDL_bool (*test)(int));
+
+#endif // SDL_audiodev_c_h_

vendor/sdl-3.0.0/src/audio/SDL_audioqueue.c

@@ -0,0 +1,516 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "SDL_audioqueue.h"
+
+#define AUDIO_SPECS_EQUAL(x, y) (((x).format == (y).format) && ((x).channels == (y).channels) && ((x).freq == (y).freq))
+
+struct SDL_AudioTrack
+{
+    SDL_AudioSpec spec;
+    SDL_bool flushed;
+    SDL_AudioTrack *next;
+
+    size_t (*avail)(void *ctx);
+    int (*write)(void *ctx, const Uint8 *buf, size_t len);
+    size_t (*read)(void *ctx, Uint8 *buf, size_t len, SDL_bool advance);
+    void (*destroy)(void *ctx);
+};
+
+struct SDL_AudioQueue
+{
+    SDL_AudioTrack *head;
+    SDL_AudioTrack *tail;
+    size_t chunk_size;
+};
+
+typedef struct SDL_AudioChunk SDL_AudioChunk;
+
+struct SDL_AudioChunk
+{
+    SDL_AudioChunk *next;
+    size_t head;
+    size_t tail;
+    Uint8 data[SDL_VARIABLE_LENGTH_ARRAY];
+};
+
+typedef struct SDL_ChunkedAudioTrack
+{
+    SDL_AudioTrack track;
+
+    size_t chunk_size;
+
+    SDL_AudioChunk *head;
+    SDL_AudioChunk *tail;
+    size_t queued_bytes;
+
+    SDL_AudioChunk *free_chunks;
+    size_t num_free_chunks;
+} SDL_ChunkedAudioTrack;
+
+static void DestroyAudioChunk(SDL_AudioChunk *chunk)
+{
+    SDL_free(chunk);
+}
+
+static void DestroyAudioChunks(SDL_AudioChunk *chunk)
+{
+    while (chunk) {
+        SDL_AudioChunk *next = chunk->next;
+        DestroyAudioChunk(chunk);
+        chunk = next;
+    }
+}
+
+static void ResetAudioChunk(SDL_AudioChunk *chunk)
+{
+    chunk->next = NULL;
+    chunk->head = 0;
+    chunk->tail = 0;
+}
+
+static SDL_AudioChunk *CreateAudioChunk(size_t chunk_size)
+{
+    SDL_AudioChunk *chunk = (SDL_AudioChunk *)SDL_malloc(sizeof(*chunk) + chunk_size);
+
+    if (chunk == NULL) {
+        return NULL;
+    }
+
+    ResetAudioChunk(chunk);
+
+    return chunk;
+}
+
+static void DestroyAudioTrackChunk(SDL_ChunkedAudioTrack *track, SDL_AudioChunk *chunk)
+{
+    // Keeping a list of free chunks reduces memory allocations,
+    // But also increases the amount of work to perform when freeing the track.
+    const size_t max_free_bytes = 64 * 1024;
+
+    if (track->chunk_size * track->num_free_chunks < max_free_bytes) {
+        chunk->next = track->free_chunks;
+        track->free_chunks = chunk;
+        ++track->num_free_chunks;
+    } else {
+        DestroyAudioChunk(chunk);
+    }
+}
+
+static SDL_AudioChunk *CreateAudioTrackChunk(SDL_ChunkedAudioTrack *track)
+{
+    if (track->num_free_chunks > 0) {
+        SDL_AudioChunk *chunk = track->free_chunks;
+
+        track->free_chunks = chunk->next;
+        --track->num_free_chunks;
+
+        ResetAudioChunk(chunk);
+
+        return chunk;
+    }
+
+    return CreateAudioChunk(track->chunk_size);
+}
+
+static size_t AvailChunkedAudioTrack(void *ctx)
+{
+    SDL_ChunkedAudioTrack *track = ctx;
+
+    return track->queued_bytes;
+}
+
+static int WriteToChunkedAudioTrack(void *ctx, const Uint8 *data, size_t len)
+{
+    SDL_ChunkedAudioTrack *track = ctx;
+
+    SDL_AudioChunk *chunk = track->tail;
+
+    // Handle the first chunk
+    if (chunk == NULL) {
+        chunk = CreateAudioTrackChunk(track);
+
+        if (chunk == NULL) {
+            return SDL_OutOfMemory();
+        }
+
+        SDL_assert((track->head == NULL) && (track->tail == NULL) && (track->queued_bytes == 0));
+        track->head = chunk;
+        track->tail = chunk;
+    }
+
+    size_t total = 0;
+    size_t old_tail = chunk->tail;
+    size_t chunk_size = track->chunk_size;
+
+    while (chunk) {
+        size_t to_write = chunk_size - chunk->tail;
+        to_write = SDL_min(to_write, len - total);
+        SDL_memcpy(&chunk->data[chunk->tail], &data[total], to_write);
+        total += to_write;
+
+        chunk->tail += to_write;
+
+        if (total == len) {
+            break;
+        }
+
+        SDL_AudioChunk *next = CreateAudioTrackChunk(track);
+        chunk->next = next;
+        chunk = next;
+    }
+
+    // Roll back the changes if we couldn't write all the data
+    if (chunk == NULL) {
+        chunk = track->tail;
+
+        SDL_AudioChunk *next = chunk->next;
+        chunk->next = NULL;
+        chunk->tail = old_tail;
+
+        DestroyAudioChunks(next);
+
+        return SDL_OutOfMemory();
+    }
+
+    track->tail = chunk;
+    track->queued_bytes += total;
+
+    return 0;
+}
+
+static size_t ReadFromChunkedAudioTrack(void *ctx, Uint8 *data, size_t len, SDL_bool advance)
+{
+    SDL_ChunkedAudioTrack *track = ctx;
+    SDL_AudioChunk *chunk = track->head;
+
+    size_t total = 0;
+    size_t head = 0;
+
+    while (chunk) {
+        head = chunk->head;
+
+        size_t to_read = chunk->tail - head;
+        to_read = SDL_min(to_read, len - total);
+        SDL_memcpy(&data[total], &chunk->data[head], to_read);
+        total += to_read;
+
+        SDL_AudioChunk *next = chunk->next;
+
+        if (total == len) {
+            head += to_read;
+            break;
+        }
+
+        if (advance) {
+            DestroyAudioTrackChunk(track, chunk);
+        }
+
+        chunk = next;
+    }
+
+    if (advance) {
+        if (chunk) {
+            chunk->head = head;
+            track->head = chunk;
+        } else {
+            track->head = NULL;
+            track->tail = NULL;
+        }
+
+        track->queued_bytes -= total;
+    }
+
+    return total;
+}
+
+static void DestroyChunkedAudioTrack(void *ctx)
+{
+    SDL_ChunkedAudioTrack *track = ctx;
+    DestroyAudioChunks(track->head);
+    DestroyAudioChunks(track->free_chunks);
+    SDL_free(track);
+}
+
+static SDL_AudioTrack *CreateChunkedAudioTrack(const SDL_AudioSpec *spec, size_t chunk_size)
+{
+    SDL_ChunkedAudioTrack *track = (SDL_ChunkedAudioTrack *)SDL_calloc(1, sizeof(*track));
+
+    if (track == NULL) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    SDL_copyp(&track->track.spec, spec);
+    track->track.avail = AvailChunkedAudioTrack;
+    track->track.write = WriteToChunkedAudioTrack;
+    track->track.read = ReadFromChunkedAudioTrack;
+    track->track.destroy = DestroyChunkedAudioTrack;
+
+    track->chunk_size = chunk_size;
+
+    return &track->track;
+}
+
+SDL_AudioQueue *SDL_CreateAudioQueue(size_t chunk_size)
+{
+    SDL_AudioQueue *queue = (SDL_AudioQueue *)SDL_calloc(1, sizeof(*queue));
+
+    if (queue == NULL) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    queue->chunk_size = chunk_size;
+
+    return queue;
+}
+
+void SDL_DestroyAudioQueue(SDL_AudioQueue *queue)
+{
+    SDL_ClearAudioQueue(queue);
+
+    SDL_free(queue);
+}
+
+void SDL_ClearAudioQueue(SDL_AudioQueue *queue)
+{
+    SDL_AudioTrack *track = queue->head;
+    queue->head = NULL;
+    queue->tail = NULL;
+
+    while (track) {
+        SDL_AudioTrack *next = track->next;
+        track->destroy(track);
+        track = next;
+    }
+}
+
+static void SDL_FlushAudioTrack(SDL_AudioTrack *track)
+{
+    track->flushed = SDL_TRUE;
+    track->write = NULL;
+}
+
+void SDL_FlushAudioQueue(SDL_AudioQueue *queue)
+{
+    SDL_AudioTrack *track = queue->tail;
+
+    if (track) {
+        SDL_FlushAudioTrack(track);
+    }
+}
+
+void SDL_PopAudioQueueHead(SDL_AudioQueue *queue)
+{
+    SDL_AudioTrack *track = queue->head;
+
+    for (;;) {
+        SDL_bool flushed = track->flushed;
+
+        SDL_AudioTrack *next = track->next;
+        track->destroy(track);
+        track = next;
+
+        if (flushed) {
+            break;
+        }
+    }
+
+    queue->head = track;
+
+    if (track == NULL) {
+        queue->tail = NULL;
+    }
+}
+
+size_t SDL_GetAudioQueueChunkSize(SDL_AudioQueue *queue)
+{
+    return queue->chunk_size;
+}
+
+SDL_AudioTrack *SDL_CreateChunkedAudioTrack(const SDL_AudioSpec *spec, const Uint8 *data, size_t len, size_t chunk_size)
+{
+    SDL_AudioTrack *track = CreateChunkedAudioTrack(spec, chunk_size);
+
+    if (track == NULL) {
+        return NULL;
+    }
+
+    if (track->write(track, data, len) != 0) {
+        track->destroy(track);
+        return NULL;
+    }
+
+    return track;
+}
+
+void SDL_AddTrackToAudioQueue(SDL_AudioQueue *queue, SDL_AudioTrack *track)
+{
+    SDL_AudioTrack *tail = queue->tail;
+
+    if (tail) {
+        // If the spec has changed, make sure to flush the previous track
+        if (!AUDIO_SPECS_EQUAL(tail->spec, track->spec)) {
+            SDL_FlushAudioTrack(tail);
+        }
+
+        tail->next = track;
+    } else {
+        queue->head = track;
+    }
+
+    queue->tail = track;
+}
+
+int SDL_WriteToAudioQueue(SDL_AudioQueue *queue, const SDL_AudioSpec *spec, const Uint8 *data, size_t len)
+{
+    if (len == 0) {
+        return 0;
+    }
+
+    SDL_AudioTrack *track = queue->tail;
+
+    if ((track != NULL) && !AUDIO_SPECS_EQUAL(track->spec, *spec)) {
+        SDL_FlushAudioTrack(track);
+    }
+
+    if ((track == NULL) || (track->write == NULL)) {
+        SDL_AudioTrack *new_track = CreateChunkedAudioTrack(spec, queue->chunk_size);
+
+        if (new_track == NULL) {
+            return SDL_OutOfMemory();
+        }
+
+        if (track) {
+            track->next = new_track;
+        } else {
+            queue->head = new_track;
+        }
+
+        queue->tail = new_track;
+
+        track = new_track;
+    }
+
+    return track->write(track, data, len);
+}
+
+void *SDL_BeginAudioQueueIter(SDL_AudioQueue *queue)
+{
+    return queue->head;
+}
+
+size_t SDL_NextAudioQueueIter(SDL_AudioQueue *queue, void **inout_iter, SDL_AudioSpec *out_spec, SDL_bool *out_flushed)
+{
+    SDL_AudioTrack *iter = *inout_iter;
+    SDL_assert(iter != NULL);
+
+    SDL_copyp(out_spec, &iter->spec);
+
+    SDL_bool flushed = SDL_FALSE;
+    size_t queued_bytes = 0;
+
+    while (iter) {
+        SDL_AudioTrack *track = iter;
+        iter = iter->next;
+
+        size_t avail = track->avail(track);
+
+        if (avail >= SDL_SIZE_MAX - queued_bytes) {
+            queued_bytes = SDL_SIZE_MAX;
+            flushed = SDL_FALSE;
+            break;
+        }
+
+        queued_bytes += avail;
+        flushed = track->flushed;
+
+        if (flushed) {
+            break;
+        }
+    }
+
+    *inout_iter = iter;
+    *out_flushed = flushed;
+
+    return queued_bytes;
+}
+
+int SDL_ReadFromAudioQueue(SDL_AudioQueue *queue, Uint8 *data, size_t len)
+{
+    size_t total = 0;
+    SDL_AudioTrack *track = queue->head;
+
+    for (;;) {
+        if (track == NULL) {
+            return SDL_SetError("Reading past end of queue");
+        }
+
+        total += track->read(track, &data[total], len - total, SDL_TRUE);
+
+        if (total == len) {
+            return 0;
+        }
+
+        if (track->flushed) {
+            return SDL_SetError("Reading past end of flushed track");
+        }
+
+        SDL_AudioTrack *next = track->next;
+
+        if (next == NULL) {
+            return SDL_SetError("Reading past end of incomplete track");
+        }
+
+        queue->head = next;
+
+        track->destroy(track);
+        track = next;
+    }
+}
+
+int SDL_PeekIntoAudioQueue(SDL_AudioQueue *queue, Uint8 *data, size_t len)
+{
+    size_t total = 0;
+    SDL_AudioTrack *track = queue->head;
+
+    for (;;) {
+        if (track == NULL) {
+            return SDL_SetError("Peeking past end of queue");
+        }
+
+        total += track->read(track, &data[total], len - total, SDL_FALSE);
+
+        if (total == len) {
+            return 0;
+        }
+
+        if (track->flushed) {
+            // If we have run out of data, fill the rest with silence.
+            SDL_memset(&data[total], SDL_GetSilenceValueForFormat(track->spec.format), len - total);
+            return 0;
+        }
+
+        track = track->next;
+    }
+}

vendor/sdl-3.0.0/src/audio/SDL_audioqueue.h

@@ -0,0 +1,77 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_audioqueue_h_
+#define SDL_audioqueue_h_
+
+// Internal functions used by SDL_AudioStream for queueing audio.
+
+typedef struct SDL_AudioQueue SDL_AudioQueue;
+typedef struct SDL_AudioTrack SDL_AudioTrack;
+
+// Create a new audio queue
+SDL_AudioQueue *SDL_CreateAudioQueue(size_t chunk_size);
+
+// Destroy an audio queue
+void SDL_DestroyAudioQueue(SDL_AudioQueue *queue);
+
+// Completely clear the queue
+void SDL_ClearAudioQueue(SDL_AudioQueue *queue);
+
+// Mark the last track as flushed
+void SDL_FlushAudioQueue(SDL_AudioQueue *queue);
+
+// Pop the current head track
+// REQUIRES: The head track must exist, and must have been flushed
+void SDL_PopAudioQueueHead(SDL_AudioQueue *queue);
+
+// Get the chunk size, mostly for use with SDL_CreateChunkedAudioTrack
+// This can be called from any thread
+size_t SDL_GetAudioQueueChunkSize(SDL_AudioQueue *queue);
+
+// Write data to the end of queue
+// REQUIRES: If the spec has changed, the last track must have been flushed
+int SDL_WriteToAudioQueue(SDL_AudioQueue *queue, const SDL_AudioSpec *spec, const Uint8 *data, size_t len);
+
+// Create a track without needing to hold any locks
+SDL_AudioTrack *SDL_CreateChunkedAudioTrack(const SDL_AudioSpec *spec, const Uint8 *data, size_t len, size_t chunk_size);
+
+// Add a track to the end of the queue
+// REQUIRES: `track != NULL`
+void SDL_AddTrackToAudioQueue(SDL_AudioQueue *queue, SDL_AudioTrack *track);
+
+// Iterate over the tracks in the queue
+void *SDL_BeginAudioQueueIter(SDL_AudioQueue *queue);
+
+// Query and update the track iterator
+// REQUIRES: `*inout_iter != NULL` (a valid iterator)
+size_t SDL_NextAudioQueueIter(SDL_AudioQueue *queue, void **inout_iter, SDL_AudioSpec *out_spec, SDL_bool *out_flushed);
+
+// Read data from the start of the queue
+// REQUIRES: There must be enough data in the queue
+int SDL_ReadFromAudioQueue(SDL_AudioQueue *queue, Uint8 *data, size_t len);
+
+// Peek into the start of the queue
+// REQUIRES: There must be enough data in the queue, unless it has been flushed, in which case missing data is filled with silence.
+int SDL_PeekIntoAudioQueue(SDL_AudioQueue *queue, Uint8 *data, size_t len);
+
+#endif // SDL_audioqueue_h_

vendor/sdl-3.0.0/src/audio/SDL_audioresample.c

@@ -0,0 +1,335 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "SDL_sysaudio.h"
+#include "SDL_audioresample.h"
+
+// SDL's resampler uses a "bandlimited interpolation" algorithm:
+//     https://ccrma.stanford.edu/~jos/resample/
+
+#include "SDL_audio_resampler_filter.h"
+
+// For a given srcpos, `srcpos + frame` are sampled, where `-RESAMPLER_ZERO_CROSSINGS < frame <= RESAMPLER_ZERO_CROSSINGS`.
+// Note, when upsampling, it is also possible to start sampling from `srcpos = -1`.
+#define RESAMPLER_MAX_PADDING_FRAMES (RESAMPLER_ZERO_CROSSINGS + 1)
+
+#define RESAMPLER_FILTER_INTERP_BITS  (32 - RESAMPLER_BITS_PER_ZERO_CROSSING)
+#define RESAMPLER_FILTER_INTERP_RANGE (1 << RESAMPLER_FILTER_INTERP_BITS)
+
+#define RESAMPLER_SAMPLES_PER_FRAME (RESAMPLER_ZERO_CROSSINGS * 2)
+
+#define RESAMPLER_FULL_FILTER_SIZE (RESAMPLER_SAMPLES_PER_FRAME * (RESAMPLER_SAMPLES_PER_ZERO_CROSSING + 1))
+
+static void ResampleFrame_Scalar(const float *src, float *dst, const float *raw_filter, float interp, int chans)
+{
+    int i, chan;
+
+    float filter[RESAMPLER_SAMPLES_PER_FRAME];
+
+    // Interpolate between the nearest two filters
+    for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+        filter[i] = (raw_filter[i] * (1.0f - interp)) + (raw_filter[i + RESAMPLER_SAMPLES_PER_FRAME] * interp);
+    }
+
+    if (chans == 2) {
+        float out[2];
+        out[0] = 0.0f;
+        out[1] = 0.0f;
+
+        for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+            const float scale = filter[i];
+            out[0] += src[i * 2 + 0] * scale;
+            out[1] += src[i * 2 + 1] * scale;
+        }
+
+        dst[0] = out[0];
+        dst[1] = out[1];
+        return;
+    }
+
+    if (chans == 1) {
+        float out = 0.0f;
+
+        for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+            out += src[i] * filter[i];
+        }
+
+        dst[0] = out;
+        return;
+    }
+
+    for (chan = 0; chan < chans; chan++) {
+        float f = 0.0f;
+
+        for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+            f += src[i * chans + chan] * filter[i];
+        }
+
+        dst[chan] = f;
+    }
+}
+
+#ifdef SDL_SSE_INTRINSICS
+static void SDL_TARGETING("sse") ResampleFrame_SSE(const float *src, float *dst, const float *raw_filter, float interp, int chans)
+{
+#if RESAMPLER_SAMPLES_PER_FRAME != 10
+#error Invalid samples per frame
+#endif
+
+    // Load the filter
+    __m128 f0 = _mm_loadu_ps(raw_filter + 0);
+    __m128 f1 = _mm_loadu_ps(raw_filter + 4);
+    __m128 f2 = _mm_loadl_pi(_mm_setzero_ps(), (const __m64 *)(raw_filter + 8));
+
+    __m128 g0 = _mm_loadu_ps(raw_filter + 10);
+    __m128 g1 = _mm_loadu_ps(raw_filter + 14);
+    __m128 g2 = _mm_loadl_pi(_mm_setzero_ps(), (const __m64 *)(raw_filter + 18));
+
+    __m128 interp1 = _mm_set1_ps(interp);
+    __m128 interp2 = _mm_sub_ps(_mm_set1_ps(1.0f), _mm_set1_ps(interp));
+
+    // Linear interpolate the filter
+    f0 = _mm_add_ps(_mm_mul_ps(f0, interp2), _mm_mul_ps(g0, interp1));
+    f1 = _mm_add_ps(_mm_mul_ps(f1, interp2), _mm_mul_ps(g1, interp1));
+    f2 = _mm_add_ps(_mm_mul_ps(f2, interp2), _mm_mul_ps(g2, interp1));
+
+    if (chans == 2) {
+        // Duplicate each of the filter elements
+        g0 = _mm_unpackhi_ps(f0, f0);
+        f0 = _mm_unpacklo_ps(f0, f0);
+        g1 = _mm_unpackhi_ps(f1, f1);
+        f1 = _mm_unpacklo_ps(f1, f1);
+        f2 = _mm_unpacklo_ps(f2, f2);
+
+        // Multiply the filter by the input
+        f0 = _mm_mul_ps(f0, _mm_loadu_ps(src + 0));
+        g0 = _mm_mul_ps(g0, _mm_loadu_ps(src + 4));
+        f1 = _mm_mul_ps(f1, _mm_loadu_ps(src + 8));
+        g1 = _mm_mul_ps(g1, _mm_loadu_ps(src + 12));
+        f2 = _mm_mul_ps(f2, _mm_loadu_ps(src + 16));
+
+        // Calculate the sum
+        f0 = _mm_add_ps(_mm_add_ps(_mm_add_ps(f0, g0), _mm_add_ps(f1, g1)), f2);
+        f0 = _mm_add_ps(f0, _mm_movehl_ps(f0, f0));
+
+        // Store the result
+        _mm_storel_pi((__m64 *)dst, f0);
+        return;
+    }
+
+    if (chans == 1) {
+        // Multiply the filter by the input
+        f0 = _mm_mul_ps(f0, _mm_loadu_ps(src + 0));
+        f1 = _mm_mul_ps(f1, _mm_loadu_ps(src + 4));
+        f2 = _mm_mul_ps(f2, _mm_loadl_pi(_mm_setzero_ps(), (const __m64 *)(src + 8)));
+
+        // Calculate the sum
+        f0 = _mm_add_ps(f0, f1);
+        f0 = _mm_add_ps(_mm_add_ps(f0, f2), _mm_movehl_ps(f0, f0));
+        f0 = _mm_add_ss(f0, _mm_shuffle_ps(f0, f0, _MM_SHUFFLE(1, 1, 1, 1)));
+
+        // Store the result
+        _mm_store_ss(dst, f0);
+        return;
+    }
+
+    float filter[RESAMPLER_SAMPLES_PER_FRAME];
+    _mm_storeu_ps(filter + 0, f0);
+    _mm_storeu_ps(filter + 4, f1);
+    _mm_storel_pi((__m64 *)(filter + 8), f2);
+
+    int i, chan = 0;
+
+    for (; chan + 4 <= chans; chan += 4) {
+        f0 = _mm_setzero_ps();
+
+        for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+            f0 = _mm_add_ps(f0, _mm_mul_ps(_mm_loadu_ps(&src[i * chans + chan]), _mm_load1_ps(&filter[i])));
+        }
+
+        _mm_storeu_ps(&dst[chan], f0);
+    }
+
+    for (; chan < chans; chan++) {
+        f0 = _mm_setzero_ps();
+
+        for (i = 0; i < RESAMPLER_SAMPLES_PER_FRAME; i++) {
+            f0 = _mm_add_ss(f0, _mm_mul_ss(_mm_load_ss(&src[i * chans + chan]), _mm_load_ss(&filter[i])));
+        }
+
+        _mm_store_ss(&dst[chan], f0);
+    }
+}
+#endif
+
+static void (*ResampleFrame)(const float *src, float *dst, const float *raw_filter, float interp, int chans);
+
+static float FullResamplerFilter[RESAMPLER_FULL_FILTER_SIZE];
+
+void SDL_SetupAudioResampler(void)
+{
+    static SDL_bool setup = SDL_FALSE;
+    if (setup) {
+        return;
+    }
+
+    // Build a table combining the left and right wings, for faster access
+    int i, j;
+
+    for (i = 0; i < RESAMPLER_SAMPLES_PER_ZERO_CROSSING; ++i) {
+        for (j = 0; j < RESAMPLER_ZERO_CROSSINGS; j++) {
+            int lwing = (i * RESAMPLER_SAMPLES_PER_FRAME) + (RESAMPLER_ZERO_CROSSINGS - 1) - j;
+            int rwing = (RESAMPLER_FULL_FILTER_SIZE - 1) - lwing;
+
+            float value = ResamplerFilter[(i * RESAMPLER_ZERO_CROSSINGS) + j];
+            FullResamplerFilter[lwing] = value;
+            FullResamplerFilter[rwing] = value;
+        }
+    }
+
+    for (i = 0; i < RESAMPLER_ZERO_CROSSINGS; ++i) {
+        int rwing = i + RESAMPLER_ZERO_CROSSINGS;
+        int lwing = (RESAMPLER_FULL_FILTER_SIZE - 1) - rwing;
+
+        FullResamplerFilter[lwing] = 0.0f;
+        FullResamplerFilter[rwing] = 0.0f;
+    }
+
+    ResampleFrame = ResampleFrame_Scalar;
+
+#ifdef SDL_SSE_INTRINSICS
+    if (SDL_HasSSE()) {
+        ResampleFrame = ResampleFrame_SSE;
+    }
+#endif
+
+    setup = SDL_TRUE;
+}
+
+Sint64 SDL_GetResampleRate(int src_rate, int dst_rate)
+{
+    SDL_assert(src_rate > 0);
+    SDL_assert(dst_rate > 0);
+
+    Sint64 sample_rate = ((Sint64)src_rate << 32) / (Sint64)dst_rate;
+    SDL_assert(sample_rate > 0);
+
+    return sample_rate;
+}
+
+int SDL_GetResamplerHistoryFrames(void)
+{
+    // Even if we aren't currently resampling, make sure to keep enough history in case we need to later.
+
+    return RESAMPLER_MAX_PADDING_FRAMES;
+}
+
+int SDL_GetResamplerPaddingFrames(Sint64 resample_rate)
+{
+    // This must always be <= SDL_GetResamplerHistoryFrames()
+
+    return resample_rate ? RESAMPLER_MAX_PADDING_FRAMES : 0;
+}
+
+// These are not general purpose. They do not check for all possible underflow/overflow
+SDL_FORCE_INLINE Sint64 ResamplerAdd(Sint64 a, Sint64 b, Sint64 *ret)
+{
+    if ((b > 0) && (a > SDL_MAX_SINT64 - b)) {
+        return -1;
+    }
+
+    *ret = a + b;
+    return 0;
+}
+
+SDL_FORCE_INLINE Sint64 ResamplerMul(Sint64 a, Sint64 b, Sint64 *ret)
+{
+    if ((b > 0) && (a > SDL_MAX_SINT64 / b)) {
+        return -1;
+    }
+
+    *ret = a * b;
+    return 0;
+}
+
+Sint64 SDL_GetResamplerInputFrames(Sint64 output_frames, Sint64 resample_rate, Sint64 resample_offset)
+{
+    // Calculate the index of the last input frame, then add 1.
+    // ((((output_frames - 1) * resample_rate) + resample_offset) >> 32) + 1
+
+    Sint64 output_offset;
+    if (ResamplerMul(output_frames, resample_rate, &output_offset) ||
+        ResamplerAdd(output_offset, -resample_rate + resample_offset + 0x100000000, &output_offset)) {
+        output_offset = SDL_MAX_SINT64;
+    }
+
+    Sint64 input_frames = (Sint64)(Sint32)(output_offset >> 32);
+    input_frames = SDL_max(input_frames, 0);
+
+    return input_frames;
+}
+
+Sint64 SDL_GetResamplerOutputFrames(Sint64 input_frames, Sint64 resample_rate, Sint64 *inout_resample_offset)
+{
+    Sint64 resample_offset = *inout_resample_offset;
+
+    // input_offset = (input_frames << 32) - resample_offset;
+    Sint64 input_offset;
+    if (ResamplerMul(input_frames, 0x100000000, &input_offset) ||
+        ResamplerAdd(input_offset, -resample_offset, &input_offset)) {
+        input_offset = SDL_MAX_SINT64;
+    }
+
+    // output_frames = div_ceil(input_offset, resample_rate)
+    Sint64 output_frames = (input_offset > 0) ? (((input_offset - 1) / resample_rate) + 1) : 0;
+
+    *inout_resample_offset = (output_frames * resample_rate) - input_offset;
+
+    return output_frames;
+}
+
+void SDL_ResampleAudio(int chans, const float *src, int inframes, float *dst, int outframes,
+                       Sint64 resample_rate, Sint64 *inout_resample_offset)
+{
+    int i;
+    Sint64 srcpos = *inout_resample_offset;
+
+    SDL_assert(resample_rate > 0);
+
+    for (i = 0; i < outframes; i++) {
+        int srcindex = (int)(Sint32)(srcpos >> 32);
+        Uint32 srcfraction = (Uint32)(srcpos & 0xFFFFFFFF);
+        srcpos += resample_rate;
+
+        SDL_assert(srcindex >= -1 && srcindex < inframes);
+
+        const float *filter = &FullResamplerFilter[(srcfraction >> RESAMPLER_FILTER_INTERP_BITS) * RESAMPLER_SAMPLES_PER_FRAME];
+        const float interp = (float)(srcfraction & (RESAMPLER_FILTER_INTERP_RANGE - 1)) * (1.0f / RESAMPLER_FILTER_INTERP_RANGE);
+
+        const float *frame = &src[(srcindex - (RESAMPLER_ZERO_CROSSINGS - 1)) * chans];
+        ResampleFrame(frame, dst, filter, interp, chans);
+
+        dst += chans;
+    }
+
+    *inout_resample_offset = srcpos - ((Sint64)inframes << 32);
+}

vendor/sdl-3.0.0/src/audio/SDL_audioresample.h

@@ -0,0 +1,43 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_audioresample_h_
+#define SDL_audioresample_h_
+
+// Internal functions used by SDL_AudioStream for resampling audio.
+// The resampler uses 32:32 fixed-point arithmetic to track its position.
+
+Sint64 SDL_GetResampleRate(int src_rate, int dst_rate);
+
+int SDL_GetResamplerHistoryFrames(void);
+int SDL_GetResamplerPaddingFrames(Sint64 resample_rate);
+
+Sint64 SDL_GetResamplerInputFrames(Sint64 output_frames, Sint64 resample_rate, Sint64 resample_offset);
+Sint64 SDL_GetResamplerOutputFrames(Sint64 input_frames, Sint64 resample_rate, Sint64 *inout_resample_offset);
+
+// Resample some audio.
+// REQUIRES: `inframes >= SDL_GetResamplerInputFrames(outframes)`
+// REQUIRES: At least `SDL_GetResamplerPaddingFrames(...)` extra frames to the left of src, and right of src+inframes
+void SDL_ResampleAudio(int chans, const float *src, int inframes, float *dst, int outframes,
+                       Sint64 resample_rate, Sint64 *inout_resample_offset);
+
+#endif // SDL_audioresample_h_

vendor/sdl-3.0.0/src/audio/SDL_mixer.c

@@ -0,0 +1,293 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+// This provides the default mixing callback for the SDL audio routines
+
+#include "SDL_sysaudio.h"
+
+/* This table is used to add two sound values together and pin
+ * the value to avoid overflow.  (used with permission from ARDI)
+ */
+static const Uint8 mix8[] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
+    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
+    0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
+    0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24,
+    0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
+    0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
+    0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
+    0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
+    0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
+    0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71,
+    0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C,
+    0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+    0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92,
+    0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D,
+    0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
+    0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3,
+    0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE,
+    0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
+    0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4,
+    0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
+    0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA,
+    0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5,
+    0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+};
+
+// The volume ranges from 0 - 128
+#define ADJUST_VOLUME(type, s, v) ((s) = (type)(((s) * (v)) / SDL_MIX_MAXVOLUME))
+#define ADJUST_VOLUME_U8(s, v)    ((s) = (Uint8)(((((s) - 128) * (v)) / SDL_MIX_MAXVOLUME) + 128))
+
+
+// !!! FIXME: this needs some SIMD magic.
+
+int SDL_MixAudioFormat(Uint8 *dst, const Uint8 *src, SDL_AudioFormat format,
+                        Uint32 len, int volume)
+{
+    if (volume == 0) {
+        return 0;
+    }
+
+    switch (format) {
+
+    case SDL_AUDIO_U8:
+    {
+        Uint8 src_sample;
+
+        while (len--) {
+            src_sample = *src;
+            ADJUST_VOLUME_U8(src_sample, volume);
+            *dst = mix8[*dst + src_sample];
+            ++dst;
+            ++src;
+        }
+    } break;
+
+    case SDL_AUDIO_S8:
+    {
+        Sint8 *dst8, *src8;
+        Sint8 src_sample;
+        int dst_sample;
+        const int max_audioval = SDL_MAX_SINT8;
+        const int min_audioval = SDL_MIN_SINT8;
+
+        src8 = (Sint8 *)src;
+        dst8 = (Sint8 *)dst;
+        while (len--) {
+            src_sample = *src8;
+            ADJUST_VOLUME(Sint8, src_sample, volume);
+            dst_sample = *dst8 + src_sample;
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *dst8 = (Sint8)dst_sample;
+            ++dst8;
+            ++src8;
+        }
+    } break;
+
+    case SDL_AUDIO_S16LE:
+    {
+        Sint16 src1, src2;
+        int dst_sample;
+        const int max_audioval = SDL_MAX_SINT16;
+        const int min_audioval = SDL_MIN_SINT16;
+
+        len /= 2;
+        while (len--) {
+            src1 = SDL_SwapLE16(*(Sint16 *)src);
+            ADJUST_VOLUME(Sint16, src1, volume);
+            src2 = SDL_SwapLE16(*(Sint16 *)dst);
+            src += 2;
+            dst_sample = src1 + src2;
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(Sint16 *)dst = SDL_SwapLE16((Sint16)dst_sample);
+            dst += 2;
+        }
+    } break;
+
+    case SDL_AUDIO_S16BE:
+    {
+        Sint16 src1, src2;
+        int dst_sample;
+        const int max_audioval = SDL_MAX_SINT16;
+        const int min_audioval = SDL_MIN_SINT16;
+
+        len /= 2;
+        while (len--) {
+            src1 = SDL_SwapBE16(*(Sint16 *)src);
+            ADJUST_VOLUME(Sint16, src1, volume);
+            src2 = SDL_SwapBE16(*(Sint16 *)dst);
+            src += 2;
+            dst_sample = src1 + src2;
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(Sint16 *)dst = SDL_SwapBE16((Sint16)dst_sample);
+            dst += 2;
+        }
+    } break;
+
+    case SDL_AUDIO_S32LE:
+    {
+        const Uint32 *src32 = (Uint32 *)src;
+        Uint32 *dst32 = (Uint32 *)dst;
+        Sint64 src1, src2;
+        Sint64 dst_sample;
+        const Sint64 max_audioval = SDL_MAX_SINT32;
+        const Sint64 min_audioval = SDL_MIN_SINT32;
+
+        len /= 4;
+        while (len--) {
+            src1 = (Sint64)((Sint32)SDL_SwapLE32(*src32));
+            src32++;
+            ADJUST_VOLUME(Sint64, src1, volume);
+            src2 = (Sint64)((Sint32)SDL_SwapLE32(*dst32));
+            dst_sample = src1 + src2;
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(dst32++) = SDL_SwapLE32((Uint32)((Sint32)dst_sample));
+        }
+    } break;
+
+    case SDL_AUDIO_S32BE:
+    {
+        const Uint32 *src32 = (Uint32 *)src;
+        Uint32 *dst32 = (Uint32 *)dst;
+        Sint64 src1, src2;
+        Sint64 dst_sample;
+        const Sint64 max_audioval = SDL_MAX_SINT32;
+        const Sint64 min_audioval = SDL_MIN_SINT32;
+
+        len /= 4;
+        while (len--) {
+            src1 = (Sint64)((Sint32)SDL_SwapBE32(*src32));
+            src32++;
+            ADJUST_VOLUME(Sint64, src1, volume);
+            src2 = (Sint64)((Sint32)SDL_SwapBE32(*dst32));
+            dst_sample = src1 + src2;
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(dst32++) = SDL_SwapBE32((Uint32)((Sint32)dst_sample));
+        }
+    } break;
+
+    case SDL_AUDIO_F32LE:
+    {
+        const float fmaxvolume = 1.0f / ((float)SDL_MIX_MAXVOLUME);
+        const float fvolume = (float)volume;
+        const float *src32 = (float *)src;
+        float *dst32 = (float *)dst;
+        float src1, src2;
+        double dst_sample;
+        // !!! FIXME: are these right?
+        const double max_audioval = 3.402823466e+38F;
+        const double min_audioval = -3.402823466e+38F;
+
+        len /= 4;
+        while (len--) {
+            src1 = ((SDL_SwapFloatLE(*src32) * fvolume) * fmaxvolume);
+            src2 = SDL_SwapFloatLE(*dst32);
+            src32++;
+
+            dst_sample = ((double)src1) + ((double)src2);
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(dst32++) = SDL_SwapFloatLE((float)dst_sample);
+        }
+    } break;
+
+    case SDL_AUDIO_F32BE:
+    {
+        const float fmaxvolume = 1.0f / ((float)SDL_MIX_MAXVOLUME);
+        const float fvolume = (float)volume;
+        const float *src32 = (float *)src;
+        float *dst32 = (float *)dst;
+        float src1, src2;
+        double dst_sample;
+        // !!! FIXME: are these right?
+        const double max_audioval = 3.402823466e+38F;
+        const double min_audioval = -3.402823466e+38F;
+
+        len /= 4;
+        while (len--) {
+            src1 = ((SDL_SwapFloatBE(*src32) * fvolume) * fmaxvolume);
+            src2 = SDL_SwapFloatBE(*dst32);
+            src32++;
+
+            dst_sample = ((double)src1) + ((double)src2);
+            if (dst_sample > max_audioval) {
+                dst_sample = max_audioval;
+            } else if (dst_sample < min_audioval) {
+                dst_sample = min_audioval;
+            }
+            *(dst32++) = SDL_SwapFloatBE((float)dst_sample);
+        }
+    } break;
+
+    default: // If this happens... FIXME!
+        return SDL_SetError("SDL_MixAudioFormat(): unknown audio format");
+    }
+
+    return 0;
+}

vendor/sdl-3.0.0/src/audio/SDL_sysaudio.h

@@ -0,0 +1,360 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifndef SDL_sysaudio_h_
+#define SDL_sysaudio_h_
+
+#include "../SDL_hashtable.h"
+
+#define DEBUG_AUDIOSTREAM 0
+#define DEBUG_AUDIO_CONVERT 0
+
+#if DEBUG_AUDIO_CONVERT
+#define LOG_DEBUG_AUDIO_CONVERT(from, to) SDL_Log("SDL_AUDIO_CONVERT: Converting %s to %s.\n", from, to);
+#else
+#define LOG_DEBUG_AUDIO_CONVERT(from, to)
+#endif
+
+// These pointers get set during SDL_ChooseAudioConverters() to various SIMD implementations.
+extern void (*SDL_Convert_S8_to_F32)(float *dst, const Sint8 *src, int num_samples);
+extern void (*SDL_Convert_U8_to_F32)(float *dst, const Uint8 *src, int num_samples);
+extern void (*SDL_Convert_S16_to_F32)(float *dst, const Sint16 *src, int num_samples);
+extern void (*SDL_Convert_S32_to_F32)(float *dst, const Sint32 *src, int num_samples);
+extern void (*SDL_Convert_F32_to_S8)(Sint8 *dst, const float *src, int num_samples);
+extern void (*SDL_Convert_F32_to_U8)(Uint8 *dst, const float *src, int num_samples);
+extern void (*SDL_Convert_F32_to_S16)(Sint16 *dst, const float *src, int num_samples);
+extern void (*SDL_Convert_F32_to_S32)(Sint32 *dst, const float *src, int num_samples);
+
+// !!! FIXME: These are wordy and unlocalized...
+#define DEFAULT_OUTPUT_DEVNAME "System audio output device"
+#define DEFAULT_INPUT_DEVNAME  "System audio capture device"
+
+// these are used when no better specifics are known. We default to CD audio quality.
+#define DEFAULT_AUDIO_OUTPUT_FORMAT SDL_AUDIO_S16
+#define DEFAULT_AUDIO_OUTPUT_CHANNELS 2
+#define DEFAULT_AUDIO_OUTPUT_FREQUENCY 44100
+
+#define DEFAULT_AUDIO_CAPTURE_FORMAT SDL_AUDIO_S16
+#define DEFAULT_AUDIO_CAPTURE_CHANNELS 1
+#define DEFAULT_AUDIO_CAPTURE_FREQUENCY 44100
+
+#define AUDIO_SPECS_EQUAL(x, y) (((x).format == (y).format) && ((x).channels == (y).channels) && ((x).freq == (y).freq))
+
+typedef struct SDL_AudioDevice SDL_AudioDevice;
+typedef struct SDL_LogicalAudioDevice SDL_LogicalAudioDevice;
+
+// Used by src/SDL.c to initialize a particular audio driver.
+extern int SDL_InitAudio(const char *driver_name);
+
+// Used by src/SDL.c to shut down previously-initialized audio.
+extern void SDL_QuitAudio(void);
+
+// Function to get a list of audio formats, ordered most similar to `format` to least, 0-terminated. Don't free results.
+const SDL_AudioFormat *SDL_ClosestAudioFormats(SDL_AudioFormat format);
+
+// Must be called at least once before using converters.
+extern void SDL_ChooseAudioConverters(void);
+extern void SDL_SetupAudioResampler(void);
+
+/* Backends should call this as devices are added to the system (such as
+   a USB headset being plugged in), and should also be called for
+   for every device found during DetectDevices(). */
+extern SDL_AudioDevice *SDL_AddAudioDevice(const SDL_bool iscapture, const char *name, const SDL_AudioSpec *spec, void *handle);
+
+/* Backends should call this if an opened audio device is lost.
+   This can happen due to i/o errors, or a device being unplugged, etc. */
+extern void SDL_AudioDeviceDisconnected(SDL_AudioDevice *device);
+
+// Backends should call this if the system default device changes.
+extern void SDL_DefaultAudioDeviceChanged(SDL_AudioDevice *new_default_device);
+
+// Backends should call this if a device's format is changing (opened or not); SDL will update state and carry on with the new format.
+extern int SDL_AudioDeviceFormatChanged(SDL_AudioDevice *device, const SDL_AudioSpec *newspec, int new_sample_frames);
+
+// Same as above, but assume the device is already locked.
+extern int SDL_AudioDeviceFormatChangedAlreadyLocked(SDL_AudioDevice *device, const SDL_AudioSpec *newspec, int new_sample_frames);
+
+// Find the SDL_AudioDevice associated with the handle supplied to SDL_AddAudioDevice. NULL if not found. DOES NOT LOCK THE DEVICE.
+extern SDL_AudioDevice *SDL_FindPhysicalAudioDeviceByHandle(void *handle);
+
+// Find an SDL_AudioDevice, selected by a callback. NULL if not found. DOES NOT LOCK THE DEVICE.
+extern SDL_AudioDevice *SDL_FindPhysicalAudioDeviceByCallback(SDL_bool (*callback)(SDL_AudioDevice *device, void *userdata), void *userdata);
+
+// Backends should call this if they change the device format, channels, freq, or sample_frames to keep other state correct.
+extern void SDL_UpdatedAudioDeviceFormat(SDL_AudioDevice *device);
+
+// Backends can call this to get a standardized name for a thread to power a specific audio device.
+extern char *SDL_GetAudioThreadName(SDL_AudioDevice *device, char *buf, size_t buflen);
+
+// Backends can call these to change a device's refcount.
+extern void RefPhysicalAudioDevice(SDL_AudioDevice *device);
+extern void UnrefPhysicalAudioDevice(SDL_AudioDevice *device);
+
+// These functions are the heart of the audio threads. Backends can call them directly if they aren't using the SDL-provided thread.
+extern void SDL_OutputAudioThreadSetup(SDL_AudioDevice *device);
+extern SDL_bool SDL_OutputAudioThreadIterate(SDL_AudioDevice *device);
+extern void SDL_OutputAudioThreadShutdown(SDL_AudioDevice *device);
+extern void SDL_CaptureAudioThreadSetup(SDL_AudioDevice *device);
+extern SDL_bool SDL_CaptureAudioThreadIterate(SDL_AudioDevice *device);
+extern void SDL_CaptureAudioThreadShutdown(SDL_AudioDevice *device);
+extern void SDL_AudioThreadFinalize(SDL_AudioDevice *device);
+
+// this gets used from the audio device threads. It has rules, don't use this if you don't know how to use it!
+extern void ConvertAudio(int num_frames, const void *src, SDL_AudioFormat src_format, int src_channels,
+                         void *dst, SDL_AudioFormat dst_format, int dst_channels, void* scratch);
+
+// Special case to let something in SDL_audiocvt.c access something in SDL_audio.c. Don't use this.
+extern void OnAudioStreamCreated(SDL_AudioStream *stream);
+extern void OnAudioStreamDestroy(SDL_AudioStream *stream);
+
+typedef struct SDL_AudioDriverImpl
+{
+    void (*DetectDevices)(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture);
+    int (*OpenDevice)(SDL_AudioDevice *device);
+    void (*ThreadInit)(SDL_AudioDevice *device);   // Called by audio thread at start
+    void (*ThreadDeinit)(SDL_AudioDevice *device); // Called by audio thread at end
+    int (*WaitDevice)(SDL_AudioDevice *device);
+    int (*PlayDevice)(SDL_AudioDevice *device, const Uint8 *buffer, int buflen);  // buffer and buflen are always from GetDeviceBuf, passed here for convenience.
+    Uint8 *(*GetDeviceBuf)(SDL_AudioDevice *device, int *buffer_size);
+    int (*WaitCaptureDevice)(SDL_AudioDevice *device);
+    int (*CaptureFromDevice)(SDL_AudioDevice *device, void *buffer, int buflen);
+    void (*FlushCapture)(SDL_AudioDevice *device);
+    void (*CloseDevice)(SDL_AudioDevice *device);
+    void (*FreeDeviceHandle)(SDL_AudioDevice *device); // SDL is done with this device; free the handle from SDL_AddAudioDevice()
+    void (*DeinitializeStart)(void); // SDL calls this, then starts destroying objects, then calls Deinitialize. This is a good place to stop hotplug detection.
+    void (*Deinitialize)(void);
+
+    // Some flags to push duplicate code into the core and reduce #ifdefs.
+    SDL_bool ProvidesOwnCallbackThread;  // !!! FIXME: rename this, it's not a callback thread anymore.
+    SDL_bool HasCaptureSupport;
+    SDL_bool OnlyHasDefaultOutputDevice;
+    SDL_bool OnlyHasDefaultCaptureDevice;   // !!! FIXME: is there ever a time where you'd have a default output and not a default capture (or vice versa)?
+} SDL_AudioDriverImpl;
+
+
+typedef struct SDL_PendingAudioDeviceEvent
+{
+    Uint32 type;
+    SDL_AudioDeviceID devid;
+    struct SDL_PendingAudioDeviceEvent *next;
+} SDL_PendingAudioDeviceEvent;
+
+typedef struct SDL_AudioDriver
+{
+    const char *name;  // The name of this audio driver
+    const char *desc;  // The description of this audio driver
+    SDL_AudioDriverImpl impl; // the backend's interface
+    SDL_RWLock *device_hash_lock;  // A rwlock that protects `device_hash`
+    SDL_HashTable *device_hash;  // the collection of currently-available audio devices (capture, playback, logical and physical!)
+    SDL_AudioStream *existing_streams;  // a list of all existing SDL_AudioStreams.
+    SDL_AudioDeviceID default_output_device_id;
+    SDL_AudioDeviceID default_capture_device_id;
+    SDL_PendingAudioDeviceEvent pending_events;
+    SDL_PendingAudioDeviceEvent *pending_events_tail;
+
+    // !!! FIXME: most (all?) of these don't have to be atomic.
+    SDL_AtomicInt output_device_count;
+    SDL_AtomicInt capture_device_count;
+    SDL_AtomicInt last_device_instance_id;  // increments on each device add to provide unique instance IDs
+    SDL_AtomicInt shutting_down;  // non-zero during SDL_Quit, so we known not to accept any last-minute device hotplugs.
+} SDL_AudioDriver;
+
+struct SDL_AudioQueue; // forward decl.
+
+struct SDL_AudioStream
+{
+    SDL_Mutex* lock;
+
+    SDL_PropertiesID props;
+
+    SDL_AudioStreamCallback get_callback;
+    void *get_callback_userdata;
+    SDL_AudioStreamCallback put_callback;
+    void *put_callback_userdata;
+
+    SDL_AudioSpec src_spec;
+    SDL_AudioSpec dst_spec;
+    float freq_ratio;
+
+    struct SDL_AudioQueue* queue;
+    Uint64 total_bytes_queued;
+
+    SDL_AudioSpec input_spec; // The spec of input data currently being processed
+    Sint64 resample_offset;
+
+    Uint8 *work_buffer;    // used for scratch space during data conversion/resampling.
+    size_t work_buffer_allocation;
+
+    Uint8 *history_buffer;  // history for left padding and future sample rate changes.
+    size_t history_buffer_allocation;
+
+    SDL_bool simplified;  // SDL_TRUE if created via SDL_OpenAudioDeviceStream
+
+    SDL_LogicalAudioDevice *bound_device;
+    SDL_AudioStream *next_binding;
+    SDL_AudioStream *prev_binding;
+
+    SDL_AudioStream *prev;  // linked list of all existing streams (so we can free them on shutdown).
+    SDL_AudioStream *next;  // linked list of all existing streams (so we can free them on shutdown).
+};
+
+/* Logical devices are an abstraction in SDL3; you can open the same physical
+   device multiple times, and each will result in an object with its own set
+   of bound audio streams, etc, even though internally these are all processed
+   as a group when mixing the final output for the physical device. */
+struct SDL_LogicalAudioDevice
+{
+    // the unique instance ID of this device.
+    SDL_AudioDeviceID instance_id;
+
+    // The physical device associated with this opened device.
+    SDL_AudioDevice *physical_device;
+
+    // If whole logical device is paused (process no streams bound to this device).
+    SDL_AtomicInt paused;
+
+    // double-linked list of all audio streams currently bound to this opened device.
+    SDL_AudioStream *bound_streams;
+
+    // SDL_TRUE if this was opened as a default device.
+    SDL_bool opened_as_default;
+
+    // SDL_TRUE if device was opened with SDL_OpenAudioDeviceStream (so it forbids binding changes, etc).
+    SDL_bool simplified;
+
+    // If non-NULL, callback into the app that lets them access the final postmix buffer.
+    SDL_AudioPostmixCallback postmix;
+
+    // App-supplied pointer for postmix callback.
+    void *postmix_userdata;
+
+    // double-linked list of opened devices on the same physical device.
+    SDL_LogicalAudioDevice *next;
+    SDL_LogicalAudioDevice *prev;
+};
+
+struct SDL_AudioDevice
+{
+    // A mutex for locking access to this struct
+    SDL_Mutex *lock;
+
+    // Reference count of the device; logical devices, device threads, etc, add to this.
+    SDL_AtomicInt refcount;
+
+    // These are, initially, set from current_audio, but we might swap them out with Zombie versions on disconnect/failure.
+    int (*WaitDevice)(SDL_AudioDevice *device);
+    int (*PlayDevice)(SDL_AudioDevice *device, const Uint8 *buffer, int buflen);
+    Uint8 *(*GetDeviceBuf)(SDL_AudioDevice *device, int *buffer_size);
+    int (*WaitCaptureDevice)(SDL_AudioDevice *device);
+    int (*CaptureFromDevice)(SDL_AudioDevice *device, void *buffer, int buflen);
+    void (*FlushCapture)(SDL_AudioDevice *device);
+
+    // human-readable name of the device. ("SoundBlaster Pro 16")
+    char *name;
+
+    // the unique instance ID of this device.
+    SDL_AudioDeviceID instance_id;
+
+    // a way for the backend to identify this device _when not opened_
+    void *handle;
+
+    // The device's current audio specification
+    SDL_AudioSpec spec;
+    int buffer_size;
+
+    // The device's default audio specification
+    SDL_AudioSpec default_spec;
+
+    // Number of sample frames the devices wants per-buffer.
+    int sample_frames;
+
+    // Value to use for SDL_memset to silence a buffer in this device's format
+    int silence_value;
+
+    // non-zero if we are signaling the audio thread to end.
+    SDL_AtomicInt shutdown;
+
+    // non-zero if this was a disconnected device and we're waiting for it to be decommissioned.
+    SDL_AtomicInt zombie;
+
+    // SDL_TRUE if this is a capture device instead of an output device
+    SDL_bool iscapture;
+
+    // SDL_TRUE if audio thread can skip silence/mix/convert stages and just do a basic memcpy.
+    SDL_bool simple_copy;
+
+    // Scratch buffers used for mixing.
+    Uint8 *work_buffer;
+    Uint8 *mix_buffer;
+    float *postmix_buffer;
+
+    // Size of work_buffer (and mix_buffer) in bytes.
+    int work_buffer_size;
+
+    // A thread to feed the audio device
+    SDL_Thread *thread;
+
+    // SDL_TRUE if this physical device is currently opened by the backend.
+    SDL_bool currently_opened;
+
+    // Data private to this driver
+    struct SDL_PrivateAudioData *hidden;
+
+    // All logical devices associated with this physical device.
+    SDL_LogicalAudioDevice *logical_devices;
+};
+
+typedef struct AudioBootStrap
+{
+    const char *name;
+    const char *desc;
+    SDL_bool (*init)(SDL_AudioDriverImpl *impl);
+    SDL_bool demand_only; // if SDL_TRUE: request explicitly, or it won't be available.
+} AudioBootStrap;
+
+// Not all of these are available in a given build. Use #ifdefs, etc.
+extern AudioBootStrap PIPEWIRE_bootstrap;
+extern AudioBootStrap PULSEAUDIO_bootstrap;
+extern AudioBootStrap ALSA_bootstrap;
+extern AudioBootStrap JACK_bootstrap;
+extern AudioBootStrap SNDIO_bootstrap;
+extern AudioBootStrap NETBSDAUDIO_bootstrap;
+extern AudioBootStrap DSP_bootstrap;
+extern AudioBootStrap WASAPI_bootstrap;
+extern AudioBootStrap DSOUND_bootstrap;
+extern AudioBootStrap WINMM_bootstrap;
+extern AudioBootStrap HAIKUAUDIO_bootstrap;
+extern AudioBootStrap COREAUDIO_bootstrap;
+extern AudioBootStrap DISKAUDIO_bootstrap;
+extern AudioBootStrap DUMMYAUDIO_bootstrap;
+extern AudioBootStrap AAUDIO_bootstrap;
+extern AudioBootStrap OPENSLES_bootstrap;
+extern AudioBootStrap ANDROIDAUDIO_bootstrap;
+extern AudioBootStrap PS2AUDIO_bootstrap;
+extern AudioBootStrap PSPAUDIO_bootstrap;
+extern AudioBootStrap VITAAUD_bootstrap;
+extern AudioBootStrap N3DSAUDIO_bootstrap;
+extern AudioBootStrap EMSCRIPTENAUDIO_bootstrap;
+extern AudioBootStrap QSAAUDIO_bootstrap;
+
+#endif // SDL_sysaudio_h_

vendor/sdl-3.0.0/src/audio/SDL_wave.h

@@ -0,0 +1,151 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* RIFF WAVE files are little-endian */
+
+/*******************************************/
+/* Define values for Microsoft WAVE format */
+/*******************************************/
+/* FOURCC */
+#define RIFF 0x46464952 /* "RIFF" */
+#define WAVE 0x45564157 /* "WAVE" */
+#define FACT 0x74636166 /* "fact" */
+#define LIST 0x5453494c /* "LIST" */
+#define BEXT 0x74786562 /* "bext" */
+#define JUNK 0x4B4E554A /* "JUNK" */
+#define FMT  0x20746D66 /* "fmt " */
+#define DATA 0x61746164 /* "data" */
+/* Format tags */
+#define UNKNOWN_CODE    0x0000
+#define PCM_CODE        0x0001
+#define MS_ADPCM_CODE   0x0002
+#define IEEE_FLOAT_CODE 0x0003
+#define ALAW_CODE       0x0006
+#define MULAW_CODE      0x0007
+#define IMA_ADPCM_CODE  0x0011
+#define MPEG_CODE       0x0050
+#define MPEGLAYER3_CODE 0x0055
+#define EXTENSIBLE_CODE 0xFFFE
+
+/* Stores the WAVE format information. */
+typedef struct WaveFormat
+{
+    Uint16 formattag;     /* Raw value of the first field in the fmt chunk data. */
+    Uint16 encoding;      /* Actual encoding, possibly from the extensible header. */
+    Uint16 channels;      /* Number of channels. */
+    Uint32 frequency;     /* Sampling rate in Hz. */
+    Uint32 byterate;      /* Average bytes per second. */
+    Uint16 blockalign;    /* Bytes per block. */
+    Uint16 bitspersample; /* Currently supported are 8, 16, 24, 32, and 4 for ADPCM. */
+
+    /* Extra information size. Number of extra bytes starting at byte 18 in the
+     * fmt chunk data. This is at least 22 for the extensible header.
+     */
+    Uint16 extsize;
+
+    /* Extensible WAVE header fields */
+    Uint16 validsamplebits;
+    Uint32 samplesperblock; /* For compressed formats. Can be zero. Actually 16 bits in the header. */
+    Uint32 channelmask;
+    Uint8 subformat[16]; /* A format GUID. */
+} WaveFormat;
+
+/* Stores information on the fact chunk. */
+typedef struct WaveFact
+{
+    /* Represents the state of the fact chunk in the WAVE file.
+     * Set to -1 if the fact chunk is invalid.
+     * Set to 0 if the fact chunk is not present
+     * Set to 1 if the fact chunk is present and valid.
+     * Set to 2 if samplelength is going to be used as the number of sample frames.
+     */
+    Sint32 status;
+
+    /* Version 1 of the RIFF specification calls the field in the fact chunk
+     * dwFileSize. The Standards Update then calls it dwSampleLength and specifies
+     * that it is 'the length of the data in samples'. WAVE files from Windows
+     * with this chunk have it set to the samples per channel (sample frames).
+     * This is useful to truncate compressed audio to a specific sample count
+     * because a compressed block is usually decoded to a fixed number of
+     * sample frames.
+     */
+    Uint32 samplelength; /* Raw sample length value from the fact chunk. */
+} WaveFact;
+
+/* Generic struct for the chunks in the WAVE file. */
+typedef struct WaveChunk
+{
+    Uint32 fourcc;   /* FOURCC of the chunk. */
+    Uint32 length;   /* Size of the chunk data. */
+    Sint64 position; /* Position of the data in the stream. */
+    Uint8 *data;     /* When allocated, this points to the chunk data. length is used for the memory allocation size. */
+    size_t size;     /* Number of bytes in data that could be read from the stream. Can be smaller than length. */
+} WaveChunk;
+
+/* Controls how the size of the RIFF chunk affects the loading of a WAVE file. */
+typedef enum WaveRiffSizeHint
+{
+    RiffSizeNoHint,
+    RiffSizeForce,
+    RiffSizeIgnoreZero,
+    RiffSizeIgnore,
+    RiffSizeMaximum
+} WaveRiffSizeHint;
+
+/* Controls how a truncated WAVE file is handled. */
+typedef enum WaveTruncationHint
+{
+    TruncNoHint,
+    TruncVeryStrict,
+    TruncStrict,
+    TruncDropFrame,
+    TruncDropBlock
+} WaveTruncationHint;
+
+/* Controls how the fact chunk affects the loading of a WAVE file. */
+typedef enum WaveFactChunkHint
+{
+    FactNoHint,
+    FactTruncate,
+    FactStrict,
+    FactIgnoreZero,
+    FactIgnore
+} WaveFactChunkHint;
+
+typedef struct WaveFile
+{
+    WaveChunk chunk;
+    WaveFormat format;
+    WaveFact fact;
+
+    /* Number of sample frames that will be decoded. Calculated either with the
+     * size of the data chunk or, if the appropriate hint is enabled, with the
+     * sample length value from the fact chunk.
+     */
+    Sint64 sampleframes;
+
+    void *decoderdata; /* Some decoders require extra data for a state. */
+
+    WaveRiffSizeHint riffhint;
+    WaveTruncationHint trunchint;
+    WaveFactChunkHint facthint;
+} WaveFile;

vendor/sdl-3.0.0/src/audio/aaudio/SDL_aaudio.c

@@ -0,0 +1,536 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_AAUDIO
+
+#include "../SDL_sysaudio.h"
+#include "SDL_aaudio.h"
+
+#include "../../core/android/SDL_android.h"
+#include <stdbool.h>
+#include <aaudio/AAudio.h>
+
+#if __ANDROID_API__ < 31
+#define AAUDIO_FORMAT_PCM_I32 4
+#endif
+
+struct SDL_PrivateAudioData
+{
+    AAudioStream *stream;
+    int num_buffers;
+    Uint8 *mixbuf;          // Raw mixing buffer
+    size_t mixbuf_bytes;    // num_buffers * device->buffer_size
+    size_t callback_bytes;
+    size_t processed_bytes;
+    SDL_Semaphore *semaphore;
+    SDL_AtomicInt error_callback_triggered;
+    SDL_bool resume;  // Resume device if it was paused automatically
+};
+
+// Debug
+#if 0
+#define LOGI(...) SDL_Log(__VA_ARGS__);
+#else
+#define LOGI(...)
+#endif
+
+#define LIB_AAUDIO_SO "libaaudio.so"
+
+typedef struct AAUDIO_Data
+{
+    void *handle;
+#define SDL_PROC(ret, func, params) ret (*func) params;
+#include "SDL_aaudiofuncs.h"
+} AAUDIO_Data;
+static AAUDIO_Data ctx;
+
+static int AAUDIO_LoadFunctions(AAUDIO_Data *data)
+{
+#define SDL_PROC(ret, func, params)                                                             \
+    do {                                                                                        \
+        data->func = (ret (*) params)SDL_LoadFunction(data->handle, #func);                                     \
+        if (!data->func) {                                                                      \
+            return SDL_SetError("Couldn't load AAUDIO function %s: %s", #func, SDL_GetError()); \
+        }                                                                                       \
+    } while (0);
+#include "SDL_aaudiofuncs.h"
+    return 0;
+}
+
+
+static void AAUDIO_errorCallback(AAudioStream *stream, void *userData, aaudio_result_t error)
+{
+    LOGI("SDL AAUDIO_errorCallback: %d - %s", error, ctx.AAudio_convertResultToText(error));
+
+    // You MUST NOT close the audio stream from this callback, so we cannot call SDL_AudioDeviceDisconnected here.
+    // Just flag the device so we can kill it in PlayDevice instead.
+    SDL_AudioDevice *device = (SDL_AudioDevice *) userData;
+    SDL_AtomicSet(&device->hidden->error_callback_triggered, (int) error);  // AAUDIO_OK is zero, so !triggered means no error.
+    SDL_PostSemaphore(device->hidden->semaphore);  // in case we're blocking in WaitDevice.
+}
+
+static aaudio_data_callback_result_t AAUDIO_dataCallback(AAudioStream *stream, void *userData, void *audioData, int32_t numFrames)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *) userData;
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+    size_t framesize = SDL_AUDIO_FRAMESIZE(device->spec);
+    size_t callback_bytes = numFrames * framesize;
+    size_t old_buffer_index = hidden->callback_bytes / device->buffer_size;
+
+    if (device->iscapture) {
+        const Uint8 *input = (const Uint8 *)audioData;
+        size_t available_bytes = hidden->mixbuf_bytes - (hidden->callback_bytes - hidden->processed_bytes);
+        size_t size = SDL_min(available_bytes, callback_bytes);
+        size_t offset = hidden->callback_bytes % hidden->mixbuf_bytes;
+        size_t end = (offset + size) % hidden->mixbuf_bytes;
+        SDL_assert(size <= hidden->mixbuf_bytes);
+
+//LOGI("Recorded %zu frames, %zu available, %zu max (%zu written, %zu read)\n", callback_bytes / framesize, available_bytes / framesize, hidden->mixbuf_bytes / framesize, hidden->callback_bytes / framesize, hidden->processed_bytes / framesize);
+
+        if (offset <= end) {
+            SDL_memcpy(&hidden->mixbuf[offset], input, size);
+        } else {
+            size_t partial = (hidden->mixbuf_bytes - offset);
+            SDL_memcpy(&hidden->mixbuf[offset], &input[0], partial);
+            SDL_memcpy(&hidden->mixbuf[0], &input[partial], end);
+        }
+
+        SDL_MemoryBarrierRelease();
+        hidden->callback_bytes += size;
+
+        if (size < callback_bytes) {
+            LOGI("Audio recording overflow, dropped %zu frames\n", (callback_bytes - size) / framesize);
+        }
+    } else {
+        Uint8 *output = (Uint8 *)audioData;
+        size_t available_bytes = (hidden->processed_bytes - hidden->callback_bytes);
+        size_t size = SDL_min(available_bytes, callback_bytes);
+        size_t offset = hidden->callback_bytes % hidden->mixbuf_bytes;
+        size_t end = (offset + size) % hidden->mixbuf_bytes;
+        SDL_assert(size <= hidden->mixbuf_bytes);
+
+//LOGI("Playing %zu frames, %zu available, %zu max (%zu written, %zu read)\n", callback_bytes / framesize, available_bytes / framesize, hidden->mixbuf_bytes / framesize, hidden->processed_bytes / framesize, hidden->callback_bytes / framesize);
+
+        SDL_MemoryBarrierAcquire();
+        if (offset <= end) {
+            SDL_memcpy(output, &hidden->mixbuf[offset], size);
+        } else {
+            size_t partial = (hidden->mixbuf_bytes - offset);
+            SDL_memcpy(&output[0], &hidden->mixbuf[offset], partial);
+            SDL_memcpy(&output[partial], &hidden->mixbuf[0], end);
+        }
+        hidden->callback_bytes += size;
+
+        if (size < callback_bytes) {
+            LOGI("Audio playback underflow, missed %zu frames\n", (callback_bytes - size) / framesize);
+            SDL_memset(&output[size], device->silence_value, (callback_bytes - size));
+        }
+    }
+
+    size_t new_buffer_index = hidden->callback_bytes / device->buffer_size;
+    while (old_buffer_index < new_buffer_index) {
+        // Trigger audio processing
+        SDL_PostSemaphore(hidden->semaphore);
+        ++old_buffer_index;
+    }
+
+    return AAUDIO_CALLBACK_RESULT_CONTINUE;
+}
+
+static Uint8 *AAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *bufsize)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+    size_t offset = (hidden->processed_bytes % hidden->mixbuf_bytes);
+    return &hidden->mixbuf[offset];
+}
+
+static int AAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    SDL_WaitSemaphore(device->hidden->semaphore);
+    return 0;
+}
+
+static int BuildAAudioStream(SDL_AudioDevice *device);
+
+static int RecoverAAudioDevice(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+
+    // attempt to build a new stream, in case there's a new default device.
+    ctx.AAudioStream_requestStop(hidden->stream);
+    ctx.AAudioStream_close(hidden->stream);
+    hidden->stream = NULL;
+
+    SDL_aligned_free(hidden->mixbuf);
+    hidden->mixbuf = NULL;
+
+    SDL_DestroySemaphore(hidden->semaphore);
+    hidden->semaphore = NULL;
+
+    const int prev_sample_frames = device->sample_frames;
+    SDL_AudioSpec prevspec;
+    SDL_copyp(&prevspec, &device->spec);
+
+    if (BuildAAudioStream(device) < 0) {
+        return -1;  // oh well, we tried.
+    }
+
+    // we don't know the new device spec until we open the new device, so we saved off the old one and force it back
+    // so SDL_AudioDeviceFormatChanged can set up all the important state if necessary and then set it back to the new spec.
+    const int new_sample_frames = device->sample_frames;
+    SDL_AudioSpec newspec;
+    SDL_copyp(&newspec, &device->spec);
+
+    device->sample_frames = prev_sample_frames;
+    SDL_copyp(&device->spec, &prevspec);
+    if (SDL_AudioDeviceFormatChangedAlreadyLocked(device, &newspec, new_sample_frames) < 0) {
+        return -1;  // ugh
+    }
+    return 0;
+}
+
+
+static int AAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+
+    // AAUDIO_dataCallback picks up our work and unblocks AAUDIO_WaitDevice. But make sure we didn't fail here.
+    const aaudio_result_t err = (aaudio_result_t) SDL_AtomicGet(&hidden->error_callback_triggered);
+    if (err) {
+        SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "aaudio: Audio device triggered error %d (%s)", (int) err, ctx.AAudio_convertResultToText(err));
+
+        if (RecoverAAudioDevice(device) < 0) {
+            return -1;  // oh well, we went down hard.
+        }
+    } else {
+        SDL_MemoryBarrierRelease();
+        hidden->processed_bytes += buflen;
+    }
+    return 0;
+}
+
+static int AAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+
+    // AAUDIO_dataCallback picks up our work and unblocks AAUDIO_WaitDevice. But make sure we didn't fail here.
+    if (SDL_AtomicGet(&hidden->error_callback_triggered)) {
+        SDL_AtomicSet(&hidden->error_callback_triggered, 0);
+        return -1;
+    }
+
+    SDL_assert(buflen == device->buffer_size);  // If this isn't true, we need to change semaphore trigger logic and account for wrapping copies here
+    size_t offset = (hidden->processed_bytes % hidden->mixbuf_bytes);
+    SDL_MemoryBarrierAcquire();
+    SDL_memcpy(buffer, &hidden->mixbuf[offset], buflen);
+    hidden->processed_bytes += buflen;
+    return buflen;
+}
+
+static void AAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+    LOGI(__func__);
+
+    if (hidden) {
+        if (hidden->stream) {
+            ctx.AAudioStream_requestStop(hidden->stream);
+            // !!! FIXME: do we have to wait for the state to change to make sure all buffered audio has played, or will close do this (or will the system do this after the close)?
+            // !!! FIXME: also, will this definitely wait for a running data callback to finish, and then stop the callback from firing again?
+            ctx.AAudioStream_close(hidden->stream);
+        }
+
+        if (hidden->semaphore) {
+            SDL_DestroySemaphore(hidden->semaphore);
+        }
+
+        SDL_aligned_free(hidden->mixbuf);
+        SDL_free(hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int BuildAAudioStream(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+    const SDL_bool iscapture = device->iscapture;
+    aaudio_result_t res;
+
+    SDL_AtomicSet(&hidden->error_callback_triggered, 0);
+
+    AAudioStreamBuilder *builder = NULL;
+    res = ctx.AAudio_createStreamBuilder(&builder);
+    if (res != AAUDIO_OK) {
+        LOGI("SDL Failed AAudio_createStreamBuilder %d", res);
+        return SDL_SetError("SDL Failed AAudio_createStreamBuilder %d", res);
+    } else if (builder == NULL) {
+        LOGI("SDL Failed AAudio_createStreamBuilder - builder NULL");
+        return SDL_SetError("SDL Failed AAudio_createStreamBuilder - builder NULL");
+    }
+
+#if ALLOW_MULTIPLE_ANDROID_AUDIO_DEVICES
+    const int aaudio_device_id = (int) ((size_t) device->handle);
+    LOGI("Opening device id %d", aaudio_device_id);
+    ctx.AAudioStreamBuilder_setDeviceId(builder, aaudio_device_id);
+#endif
+
+    aaudio_format_t format;
+#ifdef SET_AUDIO_FORMAT
+    if ((device->spec.format == SDL_AUDIO_S32) && (SDL_GetAndroidSDKVersion() >= 31)) {
+        format = AAUDIO_FORMAT_PCM_I32;
+    } else if (device->spec.format == SDL_AUDIO_F32) {
+        format = AAUDIO_FORMAT_PCM_FLOAT;
+    } else {
+        format = AAUDIO_FORMAT_PCM_I16;  // sint16 is a safe bet for everything else.
+    }
+    ctx.AAudioStreamBuilder_setFormat(builder, format);
+    ctx.AAudioStreamBuilder_setSampleRate(builder, device->spec.freq);
+    ctx.AAudioStreamBuilder_setChannelCount(builder, device->spec.channels);
+#endif
+
+    const aaudio_direction_t direction = (iscapture ? AAUDIO_DIRECTION_INPUT : AAUDIO_DIRECTION_OUTPUT);
+    ctx.AAudioStreamBuilder_setDirection(builder, direction);
+    ctx.AAudioStreamBuilder_setErrorCallback(builder, AAUDIO_errorCallback, device);
+    ctx.AAudioStreamBuilder_setDataCallback(builder, AAUDIO_dataCallback, device);
+    // Some devices have flat sounding audio when low latency mode is enabled, but this is a better experience for most people
+    if (SDL_GetHintBoolean("SDL_ANDROID_LOW_LATENCY_AUDIO", SDL_TRUE)) {
+        ctx.AAudioStreamBuilder_setPerformanceMode(builder, AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
+    }
+
+    LOGI("AAudio Try to open %u hz %u bit chan %u %s samples %u",
+         device->spec.freq, SDL_AUDIO_BITSIZE(device->spec.format),
+         device->spec.channels, SDL_AUDIO_ISBIGENDIAN(device->spec.format) ? "BE" : "LE", device->sample_frames);
+
+    res = ctx.AAudioStreamBuilder_openStream(builder, &hidden->stream);
+    if (res != AAUDIO_OK) {
+        LOGI("SDL Failed AAudioStreamBuilder_openStream %d", res);
+        ctx.AAudioStreamBuilder_delete(builder);
+        return SDL_SetError("%s : %s", __func__, ctx.AAudio_convertResultToText(res));
+    }
+    ctx.AAudioStreamBuilder_delete(builder);
+
+    device->sample_frames = (int)ctx.AAudioStream_getFramesPerDataCallback(hidden->stream);
+    if (device->sample_frames == AAUDIO_UNSPECIFIED) {
+        // We'll get variable frames in the callback, make sure we have at least half a buffer available
+        device->sample_frames = (int)ctx.AAudioStream_getBufferCapacityInFrames(hidden->stream) / 2;
+    }
+
+    device->spec.freq = ctx.AAudioStream_getSampleRate(hidden->stream);
+    device->spec.channels = ctx.AAudioStream_getChannelCount(hidden->stream);
+
+    format = ctx.AAudioStream_getFormat(hidden->stream);
+    if (format == AAUDIO_FORMAT_PCM_I16) {
+        device->spec.format = SDL_AUDIO_S16;
+    } else if (format == AAUDIO_FORMAT_PCM_I32) {
+        device->spec.format = SDL_AUDIO_S32;
+    } else if (format == AAUDIO_FORMAT_PCM_FLOAT) {
+        device->spec.format = SDL_AUDIO_F32;
+    } else {
+        return SDL_SetError("Got unexpected audio format %d from AAudioStream_getFormat", (int) format);
+    }
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    // Allocate a double buffered mixing buffer
+    hidden->num_buffers = 2;
+    hidden->mixbuf_bytes = (hidden->num_buffers * device->buffer_size);
+    hidden->mixbuf = (Uint8 *)SDL_aligned_alloc(SDL_SIMDGetAlignment(), hidden->mixbuf_bytes);
+    if (hidden->mixbuf == NULL) {
+        return SDL_OutOfMemory();
+    }
+    hidden->processed_bytes = 0;
+    hidden->callback_bytes = 0;
+
+    hidden->semaphore = SDL_CreateSemaphore(iscapture ? 0 : hidden->num_buffers);
+    if (!hidden->semaphore) {
+        LOGI("SDL Failed SDL_CreateSemaphore %s iscapture:%d", SDL_GetError(), iscapture);
+        return -1;
+    }
+
+    LOGI("AAudio Actually opened %u hz %u bit chan %u %s samples %u, buffers %d",
+         device->spec.freq, SDL_AUDIO_BITSIZE(device->spec.format),
+         device->spec.channels, SDL_AUDIO_ISBIGENDIAN(device->spec.format) ? "BE" : "LE", device->sample_frames, hidden->num_buffers);
+
+    res = ctx.AAudioStream_requestStart(hidden->stream);
+    if (res != AAUDIO_OK) {
+        LOGI("SDL Failed AAudioStream_requestStart %d iscapture:%d", res, iscapture);
+        return SDL_SetError("%s : %s", __func__, ctx.AAudio_convertResultToText(res));
+    }
+
+    LOGI("SDL AAudioStream_requestStart OK");
+
+    return 0;
+}
+
+static int AAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+#if ALLOW_MULTIPLE_ANDROID_AUDIO_DEVICES
+    SDL_assert(device->handle != NULL);  // AAUDIO_UNSPECIFIED is zero, so legit devices should all be non-zero.
+#endif
+
+    LOGI(__func__);
+
+    if (device->iscapture) {
+        if (!Android_JNI_RequestPermission("android.permission.RECORD_AUDIO")) {
+            LOGI("This app doesn't have RECORD_AUDIO permission");
+            return SDL_SetError("This app doesn't have RECORD_AUDIO permission");
+        }
+    }
+
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    return BuildAAudioStream(device);
+}
+
+static SDL_bool PauseOneDevice(SDL_AudioDevice *device, void *userdata)
+{
+    struct SDL_PrivateAudioData *hidden = (struct SDL_PrivateAudioData *)device->hidden;
+    if (hidden != NULL) {
+        if (hidden->stream) {
+            aaudio_result_t res;
+
+            if (device->iscapture) {
+                // Pause() isn't implemented for 'capture', use Stop()
+                res = ctx.AAudioStream_requestStop(hidden->stream);
+            } else {
+                res = ctx.AAudioStream_requestPause(hidden->stream);
+            }
+
+            if (res != AAUDIO_OK) {
+                LOGI("SDL Failed AAudioStream_requestPause %d", res);
+                SDL_SetError("%s : %s", __func__, ctx.AAudio_convertResultToText(res));
+            }
+
+            SDL_LockMutex(device->lock);
+            hidden->resume = SDL_TRUE;
+        }
+    }
+    return SDL_FALSE;  // keep enumerating.
+}
+
+// Pause (block) all non already paused audio devices by taking their mixer lock
+void AAUDIO_PauseDevices(void)
+{
+    if (ctx.handle != NULL) {  // AAUDIO driver is used?
+        (void) SDL_FindPhysicalAudioDeviceByCallback(PauseOneDevice, NULL);
+    }
+}
+
+// Resume (unblock) all non already paused audio devices by releasing their mixer lock
+static SDL_bool ResumeOneDevice(SDL_AudioDevice *device, void *userdata)
+{
+    struct SDL_PrivateAudioData *hidden = device->hidden;
+    if (hidden != NULL) {
+        if (hidden->resume) {
+            hidden->resume = SDL_FALSE;
+            SDL_UnlockMutex(device->lock);
+        }
+
+        if (hidden->stream) {
+            aaudio_result_t res = ctx.AAudioStream_requestStart(hidden->stream);
+            if (res != AAUDIO_OK) {
+                LOGI("SDL Failed AAudioStream_requestStart %d", res);
+                SDL_SetError("%s : %s", __func__, ctx.AAudio_convertResultToText(res));
+            }
+        }
+    }
+    return SDL_FALSE;  // keep enumerating.
+}
+
+void AAUDIO_ResumeDevices(void)
+{
+    if (ctx.handle != NULL) {  // AAUDIO driver is used?
+        (void) SDL_FindPhysicalAudioDeviceByCallback(ResumeOneDevice, NULL);
+    }
+}
+
+static void AAUDIO_Deinitialize(void)
+{
+    Android_StopAudioHotplug();
+
+    LOGI(__func__);
+    if (ctx.handle) {
+        SDL_UnloadObject(ctx.handle);
+    }
+    SDL_zero(ctx);
+    LOGI("End AAUDIO %s", SDL_GetError());
+}
+
+
+static SDL_bool AAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    LOGI(__func__);
+
+    /* AAudio was introduced in Android 8.0, but has reference counting crash issues in that release,
+     * so don't use it until 8.1.
+     *
+     * See https://github.com/google/oboe/issues/40 for more information.
+     */
+    if (SDL_GetAndroidSDKVersion() < 27) {
+        return SDL_FALSE;
+    }
+
+    SDL_zero(ctx);
+
+    ctx.handle = SDL_LoadObject(LIB_AAUDIO_SO);
+    if (ctx.handle == NULL) {
+        LOGI("SDL couldn't find " LIB_AAUDIO_SO);
+        return SDL_FALSE;
+    }
+
+    if (AAUDIO_LoadFunctions(&ctx) < 0) {
+        SDL_UnloadObject(ctx.handle);
+        SDL_zero(ctx);
+        return SDL_FALSE;
+    }
+
+    impl->ThreadInit = Android_AudioThreadInit;
+    impl->Deinitialize = AAUDIO_Deinitialize;
+    impl->OpenDevice = AAUDIO_OpenDevice;
+    impl->CloseDevice = AAUDIO_CloseDevice;
+    impl->WaitDevice = AAUDIO_WaitDevice;
+    impl->PlayDevice = AAUDIO_PlayDevice;
+    impl->GetDeviceBuf = AAUDIO_GetDeviceBuf;
+    impl->WaitCaptureDevice = AAUDIO_WaitDevice;
+    impl->CaptureFromDevice = AAUDIO_CaptureFromDevice;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+#if ALLOW_MULTIPLE_ANDROID_AUDIO_DEVICES
+    impl->DetectDevices = Android_StartAudioHotplug;
+#else
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+#endif
+
+    LOGI("SDL AAUDIO_Init OK");
+    return SDL_TRUE;
+}
+
+AudioBootStrap AAUDIO_bootstrap = {
+    "AAudio", "AAudio audio driver", AAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_AAUDIO

vendor/sdl-3.0.0/src/audio/aaudio/SDL_aaudio.h

@@ -0,0 +1,38 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_aaudio_h_
+#define SDL_aaudio_h_
+
+#ifdef SDL_AUDIO_DRIVER_AAUDIO
+
+void AAUDIO_ResumeDevices(void);
+void AAUDIO_PauseDevices(void);
+
+#else
+
+#define AAUDIO_ResumeDevices()
+#define AAUDIO_PauseDevices()
+
+#endif
+
+#endif // SDL_aaudio_h_

vendor/sdl-3.0.0/src/audio/aaudio/SDL_aaudiofuncs.h

@@ -0,0 +1,82 @@
+/*
+  Simple DirectMedia Layer
+  Copyright , (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#define SDL_PROC_UNUSED(ret, func, params)
+
+SDL_PROC(const char *, AAudio_convertResultToText, (aaudio_result_t returnCode))
+SDL_PROC(const char *, AAudio_convertStreamStateToText, (aaudio_stream_state_t state))
+SDL_PROC(aaudio_result_t, AAudio_createStreamBuilder, (AAudioStreamBuilder * *builder))
+SDL_PROC(void, AAudioStreamBuilder_setDeviceId, (AAudioStreamBuilder * builder, int32_t deviceId))
+SDL_PROC(void, AAudioStreamBuilder_setSampleRate, (AAudioStreamBuilder * builder, int32_t sampleRate))
+SDL_PROC(void, AAudioStreamBuilder_setChannelCount, (AAudioStreamBuilder * builder, int32_t channelCount))
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setSamplesPerFrame, (AAudioStreamBuilder * builder, int32_t samplesPerFrame))
+SDL_PROC(void, AAudioStreamBuilder_setFormat, (AAudioStreamBuilder * builder, aaudio_format_t format))
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setSharingMode, (AAudioStreamBuilder * builder, aaudio_sharing_mode_t sharingMode))
+SDL_PROC(void, AAudioStreamBuilder_setDirection, (AAudioStreamBuilder * builder, aaudio_direction_t direction))
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setBufferCapacityInFrames, (AAudioStreamBuilder * builder, int32_t numFrames))
+SDL_PROC(void, AAudioStreamBuilder_setPerformanceMode, (AAudioStreamBuilder * builder, aaudio_performance_mode_t mode))
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setUsage, (AAudioStreamBuilder * builder, aaudio_usage_t usage))                                         // API 28
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setContentType, (AAudioStreamBuilder * builder, aaudio_content_type_t contentType))                      // API 28
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setInputPreset, (AAudioStreamBuilder * builder, aaudio_input_preset_t inputPreset))                      // API 28
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setAllowedCapturePolicy, (AAudioStreamBuilder * builder, aaudio_allowed_capture_policy_t capturePolicy)) // API 29
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setSessionId, (AAudioStreamBuilder * builder, aaudio_session_id_t sessionId))                            // API 28
+SDL_PROC_UNUSED(void, AAudioStreamBuilder_setPrivacySensitive, (AAudioStreamBuilder * builder, bool privacySensitive))                             // API 30
+SDL_PROC(void, AAudioStreamBuilder_setDataCallback, (AAudioStreamBuilder * builder, AAudioStream_dataCallback callback, void *userData))
+SDL_PROC(void, AAudioStreamBuilder_setFramesPerDataCallback, (AAudioStreamBuilder * builder, int32_t numFrames))
+SDL_PROC(void, AAudioStreamBuilder_setErrorCallback, (AAudioStreamBuilder * builder, AAudioStream_errorCallback callback, void *userData))
+SDL_PROC(aaudio_result_t, AAudioStreamBuilder_openStream, (AAudioStreamBuilder * builder, AAudioStream **stream))
+SDL_PROC(aaudio_result_t, AAudioStreamBuilder_delete, (AAudioStreamBuilder * builder))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_release, (AAudioStream * stream)) // API 30
+SDL_PROC(aaudio_result_t, AAudioStream_close, (AAudioStream * stream))
+SDL_PROC(aaudio_result_t, AAudioStream_requestStart, (AAudioStream * stream))
+SDL_PROC(aaudio_result_t, AAudioStream_requestPause, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_requestFlush, (AAudioStream * stream))
+SDL_PROC(aaudio_result_t, AAudioStream_requestStop, (AAudioStream * stream))
+SDL_PROC(aaudio_stream_state_t, AAudioStream_getState, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_waitForStateChange, (AAudioStream * stream, aaudio_stream_state_t inputState, aaudio_stream_state_t *nextState, int64_t timeoutNanoseconds))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_read, (AAudioStream * stream, void *buffer, int32_t numFrames, int64_t timeoutNanoseconds))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_write, (AAudioStream * stream, const void *buffer, int32_t numFrames, int64_t timeoutNanoseconds))
+SDL_PROC_UNUSED(aaudio_result_t, AAudioStream_setBufferSizeInFrames, (AAudioStream * stream, int32_t numFrames))
+SDL_PROC_UNUSED(int32_t, AAudioStream_getBufferSizeInFrames, (AAudioStream * stream))
+SDL_PROC_UNUSED(int32_t, AAudioStream_getFramesPerBurst, (AAudioStream * stream))
+SDL_PROC(int32_t, AAudioStream_getBufferCapacityInFrames, (AAudioStream * stream))
+SDL_PROC(int32_t, AAudioStream_getFramesPerDataCallback, (AAudioStream * stream))
+SDL_PROC_UNUSED(int32_t, AAudioStream_getXRunCount, (AAudioStream * stream))
+SDL_PROC(int32_t, AAudioStream_getSampleRate, (AAudioStream * stream))
+SDL_PROC(int32_t, AAudioStream_getChannelCount, (AAudioStream * stream))
+SDL_PROC_UNUSED(int32_t, AAudioStream_getSamplesPerFrame, (AAudioStream * stream))
+SDL_PROC_UNUSED(int32_t, AAudioStream_getDeviceId, (AAudioStream * stream))
+SDL_PROC(aaudio_format_t, AAudioStream_getFormat, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_sharing_mode_t, AAudioStream_getSharingMode, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_performance_mode_t, AAudioStream_getPerformanceMode, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_direction_t, AAudioStream_getDirection, (AAudioStream * stream))
+SDL_PROC_UNUSED(int64_t, AAudioStream_getFramesWritten, (AAudioStream * stream))
+SDL_PROC_UNUSED(int64_t, AAudioStream_getFramesRead, (AAudioStream * stream))
+SDL_PROC_UNUSED(aaudio_session_id_t, AAudioStream_getSessionId, (AAudioStream * stream)) // API 28
+SDL_PROC(aaudio_result_t, AAudioStream_getTimestamp, (AAudioStream * stream, clockid_t clockid, int64_t *framePosition, int64_t *timeNanoseconds))
+SDL_PROC_UNUSED(aaudio_usage_t, AAudioStream_getUsage, (AAudioStream * stream))                                 // API 28
+SDL_PROC_UNUSED(aaudio_content_type_t, AAudioStream_getContentType, (AAudioStream * stream))                    // API 28
+SDL_PROC_UNUSED(aaudio_input_preset_t, AAudioStream_getInputPreset, (AAudioStream * stream))                    // API 28
+SDL_PROC_UNUSED(aaudio_allowed_capture_policy_t, AAudioStream_getAllowedCapturePolicy, (AAudioStream * stream)) // API 29
+SDL_PROC_UNUSED(bool, AAudioStream_isPrivacySensitive, (AAudioStream * stream))                                 // API 30
+
+#undef SDL_PROC
+#undef SDL_PROC_UNUSED

vendor/sdl-3.0.0/src/audio/alsa/SDL_alsa_audio.c

@@ -0,0 +1,994 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_ALSA
+
+#ifndef SDL_ALSA_NON_BLOCKING
+#define SDL_ALSA_NON_BLOCKING 0
+#endif
+
+// without the thread, you will detect devices on startup, but will not get further hotplug events. But that might be okay.
+#ifndef SDL_ALSA_HOTPLUG_THREAD
+#define SDL_ALSA_HOTPLUG_THREAD 1
+#endif
+
+// Allow access to a raw mixing buffer
+
+#include <sys/types.h>
+#include <signal.h> // For kill()
+#include <string.h>
+
+#include "../SDL_sysaudio.h"
+#include "SDL_alsa_audio.h"
+
+#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
+#endif
+
+static int (*ALSA_snd_pcm_open)(snd_pcm_t **, const char *, snd_pcm_stream_t, int);
+static int (*ALSA_snd_pcm_close)(snd_pcm_t *pcm);
+static int (*ALSA_snd_pcm_start)(snd_pcm_t *pcm);
+static snd_pcm_sframes_t (*ALSA_snd_pcm_writei)(snd_pcm_t *, const void *, snd_pcm_uframes_t);
+static snd_pcm_sframes_t (*ALSA_snd_pcm_readi)(snd_pcm_t *, void *, snd_pcm_uframes_t);
+static int (*ALSA_snd_pcm_recover)(snd_pcm_t *, int, int);
+static int (*ALSA_snd_pcm_prepare)(snd_pcm_t *);
+static int (*ALSA_snd_pcm_drain)(snd_pcm_t *);
+static const char *(*ALSA_snd_strerror)(int);
+static size_t (*ALSA_snd_pcm_hw_params_sizeof)(void);
+static size_t (*ALSA_snd_pcm_sw_params_sizeof)(void);
+static void (*ALSA_snd_pcm_hw_params_copy)(snd_pcm_hw_params_t *, const snd_pcm_hw_params_t *);
+static int (*ALSA_snd_pcm_hw_params_any)(snd_pcm_t *, snd_pcm_hw_params_t *);
+static int (*ALSA_snd_pcm_hw_params_set_access)(snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_access_t);
+static int (*ALSA_snd_pcm_hw_params_set_format)(snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_format_t);
+static int (*ALSA_snd_pcm_hw_params_set_channels)(snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int);
+static int (*ALSA_snd_pcm_hw_params_get_channels)(const snd_pcm_hw_params_t *, unsigned int *);
+static int (*ALSA_snd_pcm_hw_params_set_rate_near)(snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
+static int (*ALSA_snd_pcm_hw_params_set_period_size_near)(snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
+static int (*ALSA_snd_pcm_hw_params_get_period_size)(const snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
+static int (*ALSA_snd_pcm_hw_params_set_periods_min)(snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
+static int (*ALSA_snd_pcm_hw_params_set_periods_first)(snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
+static int (*ALSA_snd_pcm_hw_params_get_periods)(const snd_pcm_hw_params_t *, unsigned int *, int *);
+static int (*ALSA_snd_pcm_hw_params_set_buffer_size_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
+static int (*ALSA_snd_pcm_hw_params_get_buffer_size)(const snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
+static int (*ALSA_snd_pcm_hw_params)(snd_pcm_t *, snd_pcm_hw_params_t *);
+static int (*ALSA_snd_pcm_sw_params_current)(snd_pcm_t *,
+                                             snd_pcm_sw_params_t *);
+static int (*ALSA_snd_pcm_sw_params_set_start_threshold)(snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
+static int (*ALSA_snd_pcm_sw_params)(snd_pcm_t *, snd_pcm_sw_params_t *);
+static int (*ALSA_snd_pcm_nonblock)(snd_pcm_t *, int);
+static int (*ALSA_snd_pcm_wait)(snd_pcm_t *, int);
+static int (*ALSA_snd_pcm_sw_params_set_avail_min)(snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
+static int (*ALSA_snd_pcm_reset)(snd_pcm_t *);
+static int (*ALSA_snd_device_name_hint)(int, const char *, void ***);
+static char *(*ALSA_snd_device_name_get_hint)(const void *, const char *);
+static int (*ALSA_snd_device_name_free_hint)(void **);
+static snd_pcm_sframes_t (*ALSA_snd_pcm_avail)(snd_pcm_t *);
+#ifdef SND_CHMAP_API_VERSION
+static snd_pcm_chmap_t *(*ALSA_snd_pcm_get_chmap)(snd_pcm_t *);
+static int (*ALSA_snd_pcm_chmap_print)(const snd_pcm_chmap_t *map, size_t maxlen, char *buf);
+#endif
+
+#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
+#define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
+#define snd_pcm_sw_params_sizeof ALSA_snd_pcm_sw_params_sizeof
+
+static const char *alsa_library = SDL_AUDIO_DRIVER_ALSA_DYNAMIC;
+static void *alsa_handle = NULL;
+
+static int load_alsa_sym(const char *fn, void **addr)
+{
+    *addr = SDL_LoadFunction(alsa_handle, fn);
+    if (*addr == NULL) {
+        // Don't call SDL_SetError(): SDL_LoadFunction already did.
+        return 0;
+    }
+
+    return 1;
+}
+
+// cast funcs to char* first, to please GCC's strict aliasing rules.
+#define SDL_ALSA_SYM(x)                                 \
+    if (!load_alsa_sym(#x, (void **)(char *)&ALSA_##x)) \
+    return -1
+#else
+#define SDL_ALSA_SYM(x) ALSA_##x = x
+#endif
+
+static int load_alsa_syms(void)
+{
+    SDL_ALSA_SYM(snd_pcm_open);
+    SDL_ALSA_SYM(snd_pcm_close);
+    SDL_ALSA_SYM(snd_pcm_start);
+    SDL_ALSA_SYM(snd_pcm_writei);
+    SDL_ALSA_SYM(snd_pcm_readi);
+    SDL_ALSA_SYM(snd_pcm_recover);
+    SDL_ALSA_SYM(snd_pcm_prepare);
+    SDL_ALSA_SYM(snd_pcm_drain);
+    SDL_ALSA_SYM(snd_strerror);
+    SDL_ALSA_SYM(snd_pcm_hw_params_sizeof);
+    SDL_ALSA_SYM(snd_pcm_sw_params_sizeof);
+    SDL_ALSA_SYM(snd_pcm_hw_params_copy);
+    SDL_ALSA_SYM(snd_pcm_hw_params_any);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_access);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_format);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_channels);
+    SDL_ALSA_SYM(snd_pcm_hw_params_get_channels);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_rate_near);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_period_size_near);
+    SDL_ALSA_SYM(snd_pcm_hw_params_get_period_size);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_min);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_first);
+    SDL_ALSA_SYM(snd_pcm_hw_params_get_periods);
+    SDL_ALSA_SYM(snd_pcm_hw_params_set_buffer_size_near);
+    SDL_ALSA_SYM(snd_pcm_hw_params_get_buffer_size);
+    SDL_ALSA_SYM(snd_pcm_hw_params);
+    SDL_ALSA_SYM(snd_pcm_sw_params_current);
+    SDL_ALSA_SYM(snd_pcm_sw_params_set_start_threshold);
+    SDL_ALSA_SYM(snd_pcm_sw_params);
+    SDL_ALSA_SYM(snd_pcm_nonblock);
+    SDL_ALSA_SYM(snd_pcm_wait);
+    SDL_ALSA_SYM(snd_pcm_sw_params_set_avail_min);
+    SDL_ALSA_SYM(snd_pcm_reset);
+    SDL_ALSA_SYM(snd_device_name_hint);
+    SDL_ALSA_SYM(snd_device_name_get_hint);
+    SDL_ALSA_SYM(snd_device_name_free_hint);
+    SDL_ALSA_SYM(snd_pcm_avail);
+#ifdef SND_CHMAP_API_VERSION
+    SDL_ALSA_SYM(snd_pcm_get_chmap);
+    SDL_ALSA_SYM(snd_pcm_chmap_print);
+#endif
+
+    return 0;
+}
+
+#undef SDL_ALSA_SYM
+
+#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
+
+static void UnloadALSALibrary(void)
+{
+    if (alsa_handle != NULL) {
+        SDL_UnloadObject(alsa_handle);
+        alsa_handle = NULL;
+    }
+}
+
+static int LoadALSALibrary(void)
+{
+    int retval = 0;
+    if (alsa_handle == NULL) {
+        alsa_handle = SDL_LoadObject(alsa_library);
+        if (alsa_handle == NULL) {
+            retval = -1;
+            // Don't call SDL_SetError(): SDL_LoadObject already did.
+        } else {
+            retval = load_alsa_syms();
+            if (retval < 0) {
+                UnloadALSALibrary();
+            }
+        }
+    }
+    return retval;
+}
+
+#else
+
+static void UnloadALSALibrary(void)
+{
+}
+
+static int LoadALSALibrary(void)
+{
+    load_alsa_syms();
+    return 0;
+}
+
+#endif // SDL_AUDIO_DRIVER_ALSA_DYNAMIC
+
+typedef struct ALSA_Device
+{
+    char *name;
+    SDL_bool iscapture;
+    struct ALSA_Device *next;
+} ALSA_Device;
+
+static const ALSA_Device default_output_handle = {
+    "default",
+    SDL_FALSE,
+    NULL
+};
+
+static const ALSA_Device default_capture_handle = {
+    "default",
+    SDL_TRUE,
+    NULL
+};
+
+static const char *get_audio_device(void *handle, const int channels)
+{
+    SDL_assert(handle != NULL);  // SDL2 used NULL to mean "default" but that's not true in SDL3.
+
+    ALSA_Device *dev = (ALSA_Device *)handle;
+    if (SDL_strcmp(dev->name, "default") == 0) {
+        const char *device = SDL_getenv("AUDIODEV"); // Is there a standard variable name?
+        if (device != NULL) {
+            return device;
+        } else if (channels == 6) {
+            return "plug:surround51";
+        } else if (channels == 4) {
+            return "plug:surround40";
+        }
+        return "default";
+    }
+
+    return dev->name;
+}
+
+// !!! FIXME: is there a channel swizzler in alsalib instead?
+
+// https://bugzilla.libsdl.org/show_bug.cgi?id=110
+//  "For Linux ALSA, this is FL-FR-RL-RR-C-LFE
+//  and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-RL-RR"
+#define SWIZ6(T)                                                                  \
+    static void swizzle_alsa_channels_6_##T(void *buffer, const Uint32 bufferlen) \
+    {                                                                             \
+        T *ptr = (T *)buffer;                                                     \
+        Uint32 i;                                                                 \
+        for (i = 0; i < bufferlen; i++, ptr += 6) {                               \
+            T tmp;                                                                \
+            tmp = ptr[2];                                                         \
+            ptr[2] = ptr[4];                                                      \
+            ptr[4] = tmp;                                                         \
+            tmp = ptr[3];                                                         \
+            ptr[3] = ptr[5];                                                      \
+            ptr[5] = tmp;                                                         \
+        }                                                                         \
+    }
+
+
+// !!! FIXME: is there a channel swizzler in alsalib instead?
+// !!! FIXME: this screams for a SIMD shuffle operation.
+
+// https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/mapping-stream-formats-to-speaker-configurations
+//  For Linux ALSA, this appears to be FL-FR-RL-RR-C-LFE-SL-SR
+//  and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-SL-SR-RL-RR"
+#define SWIZ8(T)                                                                  \
+    static void swizzle_alsa_channels_8_##T(void *buffer, const Uint32 bufferlen) \
+    {                                                                             \
+        T *ptr = (T *)buffer;                                                     \
+        Uint32 i;                                                                 \
+        for (i = 0; i < bufferlen; i++, ptr += 6) {                               \
+            const T center = ptr[2];                                              \
+            const T subwoofer = ptr[3];                                           \
+            const T side_left = ptr[4];                                           \
+            const T side_right = ptr[5];                                          \
+            const T rear_left = ptr[6];                                           \
+            const T rear_right = ptr[7];                                          \
+            ptr[2] = rear_left;                                                   \
+            ptr[3] = rear_right;                                                  \
+            ptr[4] = center;                                                      \
+            ptr[5] = subwoofer;                                                   \
+            ptr[6] = side_left;                                                   \
+            ptr[7] = side_right;                                                  \
+        }                                                                         \
+    }
+
+#define CHANNEL_SWIZZLE(x) \
+    x(Uint64)              \
+        x(Uint32)          \
+            x(Uint16)      \
+                x(Uint8)
+
+CHANNEL_SWIZZLE(SWIZ6)
+CHANNEL_SWIZZLE(SWIZ8)
+
+#undef CHANNEL_SWIZZLE
+#undef SWIZ6
+#undef SWIZ8
+
+// Called right before feeding device->hidden->mixbuf to the hardware. Swizzle
+//  channels from Windows/Mac order to the format alsalib will want.
+static void swizzle_alsa_channels(SDL_AudioDevice *device, void *buffer, Uint32 bufferlen)
+{
+    switch (device->spec.channels) {
+#define CHANSWIZ(chans)                                                \
+    case chans:                                                        \
+        switch ((device->spec.format & (0xFF))) {                        \
+        case 8:                                                        \
+            swizzle_alsa_channels_##chans##_Uint8(buffer, bufferlen);  \
+            break;                                                     \
+        case 16:                                                       \
+            swizzle_alsa_channels_##chans##_Uint16(buffer, bufferlen); \
+            break;                                                     \
+        case 32:                                                       \
+            swizzle_alsa_channels_##chans##_Uint32(buffer, bufferlen); \
+            break;                                                     \
+        case 64:                                                       \
+            swizzle_alsa_channels_##chans##_Uint64(buffer, bufferlen); \
+            break;                                                     \
+        default:                                                       \
+            SDL_assert(!"unhandled bitsize");                          \
+            break;                                                     \
+        }                                                              \
+        return;
+
+        CHANSWIZ(6);
+        CHANSWIZ(8);
+#undef CHANSWIZ
+    default:
+        break;
+    }
+}
+
+#ifdef SND_CHMAP_API_VERSION
+// Some devices have the right channel map, no swizzling necessary
+static void no_swizzle(SDL_AudioDevice *device, void *buffer, Uint32 bufferlen)
+{
+}
+#endif // SND_CHMAP_API_VERSION
+
+// This function waits until it is possible to write a full sound buffer
+static int ALSA_WaitDevice(SDL_AudioDevice *device)
+{
+    const int fulldelay = (int) ((((Uint64) device->sample_frames) * 1000) / device->spec.freq);
+    const int delay = SDL_max(fulldelay, 10);
+
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        const int rc = ALSA_snd_pcm_wait(device->hidden->pcm_handle, delay);
+        if (rc < 0 && (rc != -EAGAIN)) {
+            const int status = ALSA_snd_pcm_recover(device->hidden->pcm_handle, rc, 0);
+            if (status < 0) {
+                // Hmm, not much we can do - abort
+                SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "ALSA: snd_pcm_wait failed (unrecoverable): %s", ALSA_snd_strerror(rc));
+                return -1;
+            }
+            continue;
+        }
+
+        if (rc > 0) {
+            break;  // ready to go!
+        }
+
+        // Timed out! Make sure we aren't shutting down and then wait again.
+    }
+
+    return 0;
+}
+
+static int ALSA_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    SDL_assert(buffer == device->hidden->mixbuf);
+    Uint8 *sample_buf = (Uint8 *) buffer;  // !!! FIXME: deal with this without casting away constness
+    const int frame_size = SDL_AUDIO_FRAMESIZE(device->spec);
+    snd_pcm_uframes_t frames_left = (snd_pcm_uframes_t) (buflen / frame_size);
+
+    device->hidden->swizzle_func(device, sample_buf, frames_left);
+
+    while ((frames_left > 0) && !SDL_AtomicGet(&device->shutdown)) {
+        const int rc = ALSA_snd_pcm_writei(device->hidden->pcm_handle, sample_buf, frames_left);
+        //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA PLAYDEVICE: WROTE %d of %d bytes", (rc >= 0) ? ((int) (rc * frame_size)) : rc, (int) (frames_left * frame_size));
+        SDL_assert(rc != 0);  // assuming this can't happen if we used snd_pcm_wait and queried for available space.
+        if (rc < 0) {
+            SDL_assert(rc != -EAGAIN);  // assuming this can't happen if we used snd_pcm_wait and queried for available space. snd_pcm_recover won't handle it!
+            const int status = ALSA_snd_pcm_recover(device->hidden->pcm_handle, rc, 0);
+            if (status < 0) {
+                // Hmm, not much we can do - abort
+                SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "ALSA write failed (unrecoverable): %s", ALSA_snd_strerror(rc));
+                return -1;
+            }
+            continue;
+        }
+
+        sample_buf += rc * frame_size;
+        frames_left -= rc;
+    }
+
+    return 0;
+}
+
+static Uint8 *ALSA_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    snd_pcm_sframes_t rc = ALSA_snd_pcm_avail(device->hidden->pcm_handle);
+    if (rc <= 0) {
+        // Wait a bit and try again, maybe the hardware isn't quite ready yet?
+        SDL_Delay(1);
+
+        rc = ALSA_snd_pcm_avail(device->hidden->pcm_handle);
+        if (rc <= 0) {
+            // We'll catch it next time
+            *buffer_size = 0;
+            return NULL;
+        }
+    }
+
+    const int requested_frames = SDL_min(device->sample_frames, rc);
+    const int requested_bytes = requested_frames * SDL_AUDIO_FRAMESIZE(device->spec);
+    SDL_assert(requested_bytes <= *buffer_size);
+    //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA GETDEVICEBUF: NEED %d BYTES", requested_bytes);
+    *buffer_size = requested_bytes;
+    return device->hidden->mixbuf;
+}
+
+static int ALSA_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    const int frame_size = SDL_AUDIO_FRAMESIZE(device->spec);
+    SDL_assert((buflen % frame_size) == 0);
+
+    const snd_pcm_sframes_t total_available = ALSA_snd_pcm_avail(device->hidden->pcm_handle);
+    const int total_frames = SDL_min(buflen / frame_size, total_available);
+
+    const int rc = ALSA_snd_pcm_readi(device->hidden->pcm_handle, buffer, total_frames);
+
+    SDL_assert(rc != -EAGAIN);  // assuming this can't happen if we used snd_pcm_wait and queried for available space. snd_pcm_recover won't handle it!
+
+    if (rc < 0) {
+        const int status = ALSA_snd_pcm_recover(device->hidden->pcm_handle, rc, 0);
+        if (status < 0) {
+            // Hmm, not much we can do - abort
+            SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "ALSA read failed (unrecoverable): %s", ALSA_snd_strerror(rc));
+            return -1;
+        }
+        return 0;  // go back to WaitDevice and try again.
+    } else if (rc > 0) {
+        device->hidden->swizzle_func(device, buffer, total_frames - rc);
+    }
+
+    //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA: captured %d bytes", rc * frame_size);
+
+    return rc * frame_size;
+}
+
+static void ALSA_FlushCapture(SDL_AudioDevice *device)
+{
+    ALSA_snd_pcm_reset(device->hidden->pcm_handle);
+}
+
+static void ALSA_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->pcm_handle) {
+            // Wait for the submitted audio to drain. ALSA_snd_pcm_drop() can hang, so don't use that.
+            SDL_Delay(((device->sample_frames * 1000) / device->spec.freq) * 2);
+            ALSA_snd_pcm_close(device->hidden->pcm_handle);
+        }
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+    }
+}
+
+static int ALSA_set_buffer_size(SDL_AudioDevice *device, snd_pcm_hw_params_t *params)
+{
+    int status;
+    snd_pcm_hw_params_t *hwparams;
+    snd_pcm_uframes_t persize;
+    unsigned int periods;
+
+    // Copy the hardware parameters for this setup
+    snd_pcm_hw_params_alloca(&hwparams);
+    ALSA_snd_pcm_hw_params_copy(hwparams, params);
+
+    // Attempt to match the period size to the requested buffer size
+    persize = device->sample_frames;
+    status = ALSA_snd_pcm_hw_params_set_period_size_near(
+        device->hidden->pcm_handle, hwparams, &persize, NULL);
+    if (status < 0) {
+        return -1;
+    }
+
+    // Need to at least double buffer
+    periods = 2;
+    status = ALSA_snd_pcm_hw_params_set_periods_min(
+        device->hidden->pcm_handle, hwparams, &periods, NULL);
+    if (status < 0) {
+        return -1;
+    }
+
+    status = ALSA_snd_pcm_hw_params_set_periods_first(
+        device->hidden->pcm_handle, hwparams, &periods, NULL);
+    if (status < 0) {
+        return -1;
+    }
+
+    // "set" the hardware with the desired parameters
+    status = ALSA_snd_pcm_hw_params(device->hidden->pcm_handle, hwparams);
+    if (status < 0) {
+        return -1;
+    }
+
+    device->sample_frames = persize;
+
+    // This is useful for debugging
+    if (SDL_getenv("SDL_AUDIO_ALSA_DEBUG")) {
+        snd_pcm_uframes_t bufsize;
+
+        ALSA_snd_pcm_hw_params_get_buffer_size(hwparams, &bufsize);
+
+        SDL_LogError(SDL_LOG_CATEGORY_AUDIO,
+                     "ALSA: period size = %ld, periods = %u, buffer size = %lu",
+                     persize, periods, bufsize);
+    }
+
+    return 0;
+}
+
+static int ALSA_OpenDevice(SDL_AudioDevice *device)
+{
+    const SDL_bool iscapture = device->iscapture;
+    int status = 0;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Open the audio device
+    // Name of device should depend on # channels in spec
+    snd_pcm_t *pcm_handle = NULL;
+    status = ALSA_snd_pcm_open(&pcm_handle,
+                               get_audio_device(device->handle, device->spec.channels),
+                               iscapture ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK,
+                               SND_PCM_NONBLOCK);
+
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't open audio device: %s", ALSA_snd_strerror(status));
+    }
+
+    device->hidden->pcm_handle = pcm_handle;
+
+    // Figure out what the hardware is capable of
+    snd_pcm_hw_params_t *hwparams = NULL;
+    snd_pcm_hw_params_alloca(&hwparams);
+    status = ALSA_snd_pcm_hw_params_any(pcm_handle, hwparams);
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't get hardware config: %s", ALSA_snd_strerror(status));
+    }
+
+    // SDL only uses interleaved sample output
+    status = ALSA_snd_pcm_hw_params_set_access(pcm_handle, hwparams,
+                                               SND_PCM_ACCESS_RW_INTERLEAVED);
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't set interleaved access: %s", ALSA_snd_strerror(status));
+    }
+
+    // Try for a closest match on audio format
+    snd_pcm_format_t format = 0;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    SDL_AudioFormat test_format;
+    while ((test_format = *(closefmts++)) != 0) {
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+            format = SND_PCM_FORMAT_U8;
+            break;
+        case SDL_AUDIO_S8:
+            format = SND_PCM_FORMAT_S8;
+            break;
+        case SDL_AUDIO_S16LE:
+            format = SND_PCM_FORMAT_S16_LE;
+            break;
+        case SDL_AUDIO_S16BE:
+            format = SND_PCM_FORMAT_S16_BE;
+            break;
+        case SDL_AUDIO_S32LE:
+            format = SND_PCM_FORMAT_S32_LE;
+            break;
+        case SDL_AUDIO_S32BE:
+            format = SND_PCM_FORMAT_S32_BE;
+            break;
+        case SDL_AUDIO_F32LE:
+            format = SND_PCM_FORMAT_FLOAT_LE;
+            break;
+        case SDL_AUDIO_F32BE:
+            format = SND_PCM_FORMAT_FLOAT_BE;
+            break;
+        default:
+            continue;
+        }
+        if (ALSA_snd_pcm_hw_params_set_format(pcm_handle, hwparams, format) >= 0) {
+            break;
+        }
+    }
+    if (!test_format) {
+        return SDL_SetError("ALSA: Unsupported audio format");
+    }
+    device->spec.format = test_format;
+
+    // Validate number of channels and determine if swizzling is necessary.
+    //  Assume original swizzling, until proven otherwise.
+    device->hidden->swizzle_func = swizzle_alsa_channels;
+#ifdef SND_CHMAP_API_VERSION
+    snd_pcm_chmap_t *chmap = ALSA_snd_pcm_get_chmap(pcm_handle);
+    if (chmap) {
+        char chmap_str[64];
+        if (ALSA_snd_pcm_chmap_print(chmap, sizeof(chmap_str), chmap_str) > 0) {
+            if (SDL_strcmp("FL FR FC LFE RL RR", chmap_str) == 0 ||
+                SDL_strcmp("FL FR FC LFE SL SR", chmap_str) == 0) {
+                device->hidden->swizzle_func = no_swizzle;
+            }
+        }
+        free(chmap); // This should NOT be SDL_free()
+    }
+#endif // SND_CHMAP_API_VERSION
+
+    // Set the number of channels
+    status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
+                                                 device->spec.channels);
+    unsigned int channels = device->spec.channels;
+    if (status < 0) {
+        status = ALSA_snd_pcm_hw_params_get_channels(hwparams, &channels);
+        if (status < 0) {
+            return SDL_SetError("ALSA: Couldn't set audio channels");
+        }
+        device->spec.channels = channels;
+    }
+
+    // Set the audio rate
+    unsigned int rate = device->spec.freq;
+    status = ALSA_snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams,
+                                                  &rate, NULL);
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't set audio frequency: %s", ALSA_snd_strerror(status));
+    }
+    device->spec.freq = rate;
+
+    // Set the buffer size, in samples
+    status = ALSA_set_buffer_size(device, hwparams);
+    if (status < 0) {
+        return SDL_SetError("Couldn't set hardware audio parameters: %s", ALSA_snd_strerror(status));
+    }
+
+    // Set the software parameters
+    snd_pcm_sw_params_t *swparams = NULL;
+    snd_pcm_sw_params_alloca(&swparams);
+    status = ALSA_snd_pcm_sw_params_current(pcm_handle, swparams);
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't get software config: %s", ALSA_snd_strerror(status));
+    }
+    status = ALSA_snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, device->sample_frames);
+    if (status < 0) {
+        return SDL_SetError("Couldn't set minimum available samples: %s", ALSA_snd_strerror(status));
+    }
+    status =
+        ALSA_snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, 1);
+    if (status < 0) {
+        return SDL_SetError("ALSA: Couldn't set start threshold: %s", ALSA_snd_strerror(status));
+    }
+    status = ALSA_snd_pcm_sw_params(pcm_handle, swparams);
+    if (status < 0) {
+        return SDL_SetError("Couldn't set software audio parameters: %s", ALSA_snd_strerror(status));
+    }
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    // Allocate mixing buffer
+    if (!iscapture) {
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+        if (device->hidden->mixbuf == NULL) {
+            return SDL_OutOfMemory();
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+#if !SDL_ALSA_NON_BLOCKING
+    if (!iscapture) {
+        ALSA_snd_pcm_nonblock(pcm_handle, 0);
+    }
+#endif
+
+    ALSA_snd_pcm_start(pcm_handle);
+
+    return 0;  // We're ready to rock and roll. :-)
+}
+
+static void add_device(const SDL_bool iscapture, const char *name, void *hint, ALSA_Device **pSeen)
+{
+    ALSA_Device *dev = SDL_malloc(sizeof(ALSA_Device));
+    char *desc;
+    char *ptr;
+
+    if (dev == NULL) {
+        return;
+    }
+
+    // Not all alsa devices are enumerable via snd_device_name_get_hint
+    //  (i.e. bluetooth devices).  Therefore if hint is passed in to this
+    //  function as NULL, assume name contains desc.
+    //  Make sure not to free the storage associated with desc in this case
+    if (hint) {
+        desc = ALSA_snd_device_name_get_hint(hint, "DESC");
+        if (desc == NULL) {
+            SDL_free(dev);
+            return;
+        }
+    } else {
+        desc = (char *)name;
+    }
+
+    SDL_assert(name != NULL);
+
+    // some strings have newlines, like "HDA NVidia, HDMI 0\nHDMI Audio Output".
+    //  just chop the extra lines off, this seems to get a reasonable device
+    //  name without extra details.
+    ptr = SDL_strchr(desc, '\n');
+    if (ptr != NULL) {
+        *ptr = '\0';
+    }
+
+    //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA: adding %s device '%s' (%s)", iscapture ? "capture" : "output", name, desc);
+
+    dev->name = SDL_strdup(name);
+    if (!dev->name) {
+        if (hint) {
+            free(desc); // This should NOT be SDL_free()
+        }
+        SDL_free(dev->name);
+        SDL_free(dev);
+        return;
+    }
+
+    // Note that spec is NULL, because we are required to open the device before
+    //  acquiring the mix format, making this information inaccessible at
+    //  enumeration time
+    SDL_AddAudioDevice(iscapture, desc, NULL, dev);
+    if (hint) {
+        free(desc); // This should NOT be SDL_free()
+    }
+
+    dev->iscapture = iscapture;
+    dev->next = *pSeen;
+    *pSeen = dev;
+}
+
+static ALSA_Device *hotplug_devices = NULL;
+
+static void ALSA_HotplugIteration(SDL_bool *has_default_output, SDL_bool *has_default_capture)
+{
+    void **hints = NULL;
+    ALSA_Device *unseen = NULL;
+    ALSA_Device *seen = NULL;
+
+    if (ALSA_snd_device_name_hint(-1, "pcm", &hints) == 0) {
+        const char *match = NULL;
+        int bestmatch = 0xFFFF;
+        int has_default = -1;
+        size_t match_len = 0;
+        static const char *const prefixes[] = {
+            "hw:", "sysdefault:", "default:", NULL
+        };
+
+        unseen = hotplug_devices;
+        seen = NULL;
+
+        // Apparently there are several different ways that ALSA lists
+        //  actual hardware. It could be prefixed with "hw:" or "default:"
+        //  or "sysdefault:" and maybe others. Go through the list and see
+        //  if we can find a preferred prefix for the system.
+        for (int i = 0; hints[i]; i++) {
+            char *name = ALSA_snd_device_name_get_hint(hints[i], "NAME");
+            if (name == NULL) {
+                continue;
+            }
+
+            if (SDL_strcmp(name, "default") == 0) {
+                if (has_default < 0) {
+                    has_default = i;
+                }
+            } else {
+                for (int j = 0; prefixes[j]; j++) {
+                    const char *prefix = prefixes[j];
+                    const size_t prefixlen = SDL_strlen(prefix);
+                    if (SDL_strncmp(name, prefix, prefixlen) == 0) {
+                        if (j < bestmatch) {
+                            bestmatch = j;
+                            match = prefix;
+                            match_len = prefixlen;
+                        }
+                    }
+                }
+
+                free(name); // This should NOT be SDL_free()
+            }
+        }
+
+        // look through the list of device names to find matches
+        if (match || (has_default >= 0)) {  // did we find a device name prefix we like at all...?
+            for (int i = 0; hints[i]; i++) {
+                char *name = ALSA_snd_device_name_get_hint(hints[i], "NAME");
+                if (name == NULL) {
+                    continue;
+                }
+
+                // only want physical hardware interfaces
+                const SDL_bool is_default = (has_default == i) ? SDL_TRUE : SDL_FALSE;
+                if (is_default || (match != NULL && SDL_strncmp(name, match, match_len) == 0)) {
+                    char *ioid = ALSA_snd_device_name_get_hint(hints[i], "IOID");
+                    const SDL_bool isoutput = (ioid == NULL) || (SDL_strcmp(ioid, "Output") == 0);
+                    const SDL_bool isinput = (ioid == NULL) || (SDL_strcmp(ioid, "Input") == 0);
+                    SDL_bool have_output = SDL_FALSE;
+                    SDL_bool have_input = SDL_FALSE;
+
+                    free(ioid); // This should NOT be SDL_free()
+
+                    if (!isoutput && !isinput) {
+                        free(name); // This should NOT be SDL_free()
+                        continue;
+                    }
+
+                    if (is_default) {
+                        if (has_default_output && isoutput) {
+                            *has_default_output = SDL_TRUE;
+                        } else if (has_default_capture && isinput) {
+                            *has_default_capture = SDL_TRUE;
+                        }
+                        free(name); // This should NOT be SDL_free()
+                        continue;
+                    }
+
+                    ALSA_Device *prev = NULL;
+                    ALSA_Device *next;
+                    for (ALSA_Device *dev = unseen; dev; dev = next) {
+                        next = dev->next;
+                        if ((SDL_strcmp(dev->name, name) == 0) && (((isinput) && dev->iscapture) || ((isoutput) && !dev->iscapture))) {
+                            if (prev) {
+                                prev->next = next;
+                            } else {
+                                unseen = next;
+                            }
+                            dev->next = seen;
+                            seen = dev;
+                            if (isinput) {
+                                have_input = SDL_TRUE;
+                            }
+                            if (isoutput) {
+                                have_output = SDL_TRUE;
+                            }
+                        } else {
+                            prev = dev;
+                        }
+                    }
+
+                    if (isinput && !have_input) {
+                        add_device(SDL_TRUE, name, hints[i], &seen);
+                    }
+                    if (isoutput && !have_output) {
+                        add_device(SDL_FALSE, name, hints[i], &seen);
+                    }
+                }
+
+                free(name); // This should NOT be SDL_free()
+            }
+        }
+
+        ALSA_snd_device_name_free_hint(hints);
+
+        hotplug_devices = seen; // now we have a known-good list of attached devices.
+
+        // report anything still in unseen as removed.
+        ALSA_Device *next = NULL;
+        for (ALSA_Device *dev = unseen; dev; dev = next) {
+            //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA: removing %s device '%s'", dev->iscapture ? "capture" : "output", dev->name);
+            next = dev->next;
+            SDL_AudioDeviceDisconnected(SDL_FindPhysicalAudioDeviceByHandle(dev));
+            SDL_free(dev->name);
+            SDL_free(dev);
+        }
+    }
+}
+
+#if SDL_ALSA_HOTPLUG_THREAD
+static SDL_AtomicInt ALSA_hotplug_shutdown;
+static SDL_Thread *ALSA_hotplug_thread;
+
+static int SDLCALL ALSA_HotplugThread(void *arg)
+{
+    SDL_SetThreadPriority(SDL_THREAD_PRIORITY_LOW);
+
+    while (!SDL_AtomicGet(&ALSA_hotplug_shutdown)) {
+        // Block awhile before checking again, unless we're told to stop.
+        const Uint64 ticks = SDL_GetTicks() + 5000;
+        while (!SDL_AtomicGet(&ALSA_hotplug_shutdown) && SDL_GetTicks() < ticks) {
+            SDL_Delay(100);
+        }
+
+        ALSA_HotplugIteration(NULL, NULL); // run the check.
+    }
+
+    return 0;
+}
+#endif
+
+static void ALSA_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    // ALSA doesn't have a concept of a changeable default device, afaik, so we expose a generic default
+    // device here. It's the best we can do at this level.
+    SDL_bool has_default_output = SDL_FALSE, has_default_capture = SDL_FALSE;
+    ALSA_HotplugIteration(&has_default_output, &has_default_capture); // run once now before a thread continues to check.
+    if (has_default_output) {
+        *default_output = SDL_AddAudioDevice(/*iscapture=*/SDL_FALSE, "ALSA default output device", NULL, (void*)&default_output_handle);
+    }
+    if (has_default_capture) {
+        *default_capture = SDL_AddAudioDevice(/*iscapture=*/SDL_TRUE, "ALSA default capture device", NULL, (void*)&default_capture_handle);
+    }
+
+#if SDL_ALSA_HOTPLUG_THREAD
+    SDL_AtomicSet(&ALSA_hotplug_shutdown, 0);
+    ALSA_hotplug_thread = SDL_CreateThread(ALSA_HotplugThread, "SDLHotplugALSA", NULL);
+    // if the thread doesn't spin, oh well, you just don't get further hotplug events.
+#endif
+}
+
+static void ALSA_DeinitializeStart(void)
+{
+    ALSA_Device *dev;
+    ALSA_Device *next;
+
+#if SDL_ALSA_HOTPLUG_THREAD
+    if (ALSA_hotplug_thread != NULL) {
+        SDL_AtomicSet(&ALSA_hotplug_shutdown, 1);
+        SDL_WaitThread(ALSA_hotplug_thread, NULL);
+        ALSA_hotplug_thread = NULL;
+    }
+#endif
+
+    // Shutting down! Clean up any data we've gathered.
+    for (dev = hotplug_devices; dev; dev = next) {
+        //SDL_LogInfo(SDL_LOG_CATEGORY_AUDIO, "ALSA: at shutdown, removing %s device '%s'", dev->iscapture ? "capture" : "output", dev->name);
+        next = dev->next;
+        SDL_free(dev->name);
+        SDL_free(dev);
+    }
+    hotplug_devices = NULL;
+}
+
+static void ALSA_Deinitialize(void)
+{
+    UnloadALSALibrary();
+}
+
+static SDL_bool ALSA_Init(SDL_AudioDriverImpl *impl)
+{
+    if (LoadALSALibrary() < 0) {
+        return SDL_FALSE;
+    }
+
+    impl->DetectDevices = ALSA_DetectDevices;
+    impl->OpenDevice = ALSA_OpenDevice;
+    impl->WaitDevice = ALSA_WaitDevice;
+    impl->GetDeviceBuf = ALSA_GetDeviceBuf;
+    impl->PlayDevice = ALSA_PlayDevice;
+    impl->CloseDevice = ALSA_CloseDevice;
+    impl->DeinitializeStart = ALSA_DeinitializeStart;
+    impl->Deinitialize = ALSA_Deinitialize;
+    impl->WaitCaptureDevice = ALSA_WaitDevice;
+    impl->CaptureFromDevice = ALSA_CaptureFromDevice;
+    impl->FlushCapture = ALSA_FlushCapture;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap ALSA_bootstrap = {
+    "alsa", "ALSA PCM audio", ALSA_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_ALSA

vendor/sdl-3.0.0/src/audio/alsa/SDL_alsa_audio.h

@@ -0,0 +1,42 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_ALSA_audio_h_
+#define SDL_ALSA_audio_h_
+
+#include <alsa/asoundlib.h>
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // The audio device handle
+    snd_pcm_t *pcm_handle;
+
+    // Raw mixing buffer
+    Uint8 *mixbuf;
+
+    // swizzle function
+    void (*swizzle_func)(SDL_AudioDevice *_this, void *buffer, Uint32 bufferlen);
+};
+
+#endif // SDL_ALSA_audio_h_

vendor/sdl-3.0.0/src/audio/android/SDL_androidaudio.c

@@ -0,0 +1,191 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_ANDROID
+
+// Output audio to Android (legacy interface)
+
+#include "../SDL_sysaudio.h"
+#include "SDL_androidaudio.h"
+
+#include "../../core/android/SDL_android.h"
+#include <android/log.h>
+
+
+struct SDL_PrivateAudioData
+{
+    int resume;  // Resume device if it was paused automatically
+};
+
+static SDL_AudioDevice *audioDevice = NULL;
+static SDL_AudioDevice *captureDevice = NULL;
+
+static int ANDROIDAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    const SDL_bool iscapture = device->iscapture;
+
+    if (iscapture) {
+        if (captureDevice) {
+            return SDL_SetError("An audio capture device is already opened");
+        }
+        captureDevice = device;
+    } else {
+        if (audioDevice) {
+            return SDL_SetError("An audio playback device is already opened");
+        }
+        audioDevice = device;
+    }
+
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if ((test_format == SDL_AUDIO_U8) ||
+            (test_format == SDL_AUDIO_S16) ||
+            (test_format == SDL_AUDIO_F32)) {
+            device->spec.format = test_format;
+            break;
+        }
+    }
+
+    if (!test_format) {
+        return SDL_SetError("android: Unsupported audio format");
+    }
+
+    if (Android_JNI_OpenAudioDevice(device) < 0) {
+        return -1;
+    }
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    return 0;
+}
+
+// !!! FIXME: this needs a WaitDevice implementation.
+
+static int ANDROIDAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    Android_JNI_WriteAudioBuffer();
+    return 0;
+}
+
+static Uint8 *ANDROIDAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return Android_JNI_GetAudioBuffer();
+}
+
+static int ANDROIDAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    return Android_JNI_CaptureAudioBuffer(buffer, buflen);
+}
+
+static void ANDROIDAUDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    Android_JNI_FlushCapturedAudio();
+}
+
+static void ANDROIDAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    /* At this point SDL_CloseAudioDevice via close_audio_device took care of terminating the audio thread
+       so it's safe to terminate the Java side buffer and AudioTrack
+     */
+    if (device->hidden) {
+        Android_JNI_CloseAudioDevice(device->iscapture);
+        if (device->iscapture) {
+            SDL_assert(captureDevice == device);
+            captureDevice = NULL;
+        } else {
+            SDL_assert(audioDevice == device);
+            audioDevice = NULL;
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+// Pause (block) all non already paused audio devices by taking their mixer lock
+void ANDROIDAUDIO_PauseDevices(void)
+{
+    // TODO: Handle multiple devices?
+    struct SDL_PrivateAudioData *hidden;
+    if (audioDevice != NULL && audioDevice->hidden != NULL) {
+        hidden = (struct SDL_PrivateAudioData *)audioDevice->hidden;
+        SDL_LockMutex(audioDevice->lock);
+        hidden->resume = SDL_TRUE;
+    }
+
+    if (captureDevice != NULL && captureDevice->hidden != NULL) {
+        hidden = (struct SDL_PrivateAudioData *)captureDevice->hidden;
+        SDL_LockMutex(captureDevice->lock);
+        hidden->resume = SDL_TRUE;
+    }
+}
+
+// Resume (unblock) all non already paused audio devices by releasing their mixer lock
+void ANDROIDAUDIO_ResumeDevices(void)
+{
+    // TODO: Handle multiple devices?
+    struct SDL_PrivateAudioData *hidden;
+    if (audioDevice != NULL && audioDevice->hidden != NULL) {
+        hidden = (struct SDL_PrivateAudioData *)audioDevice->hidden;
+        if (hidden->resume) {
+            hidden->resume = SDL_FALSE;
+            SDL_UnlockMutex(audioDevice->lock);
+        }
+    }
+
+    if (captureDevice != NULL && captureDevice->hidden != NULL) {
+        hidden = (struct SDL_PrivateAudioData *)captureDevice->hidden;
+        if (hidden->resume) {
+            hidden->resume = SDL_FALSE;
+            SDL_UnlockMutex(captureDevice->lock);
+        }
+    }
+}
+
+static SDL_bool ANDROIDAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    // !!! FIXME: if on Android API < 24, DetectDevices and Deinitialize should be NULL and OnlyHasDefaultOutputDevice and OnlyHasDefaultCaptureDevice should be SDL_TRUE, since audio device enum and hotplug appears to require Android 7.0+.
+    impl->ThreadInit = Android_AudioThreadInit;
+    impl->DetectDevices = Android_StartAudioHotplug;
+    impl->DeinitializeStart = Android_StopAudioHotplug;
+    impl->OpenDevice = ANDROIDAUDIO_OpenDevice;
+    impl->PlayDevice = ANDROIDAUDIO_PlayDevice;
+    impl->GetDeviceBuf = ANDROIDAUDIO_GetDeviceBuf;
+    impl->CloseDevice = ANDROIDAUDIO_CloseDevice;
+    impl->CaptureFromDevice = ANDROIDAUDIO_CaptureFromDevice;
+    impl->FlushCapture = ANDROIDAUDIO_FlushCapture;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap ANDROIDAUDIO_bootstrap = {
+    "android", "SDL Android audio driver", ANDROIDAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_ANDROID

vendor/sdl-3.0.0/src/audio/android/SDL_androidaudio.h

@@ -0,0 +1,38 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_androidaudio_h_
+#define SDL_androidaudio_h_
+
+#ifdef SDL_AUDIO_DRIVER_ANDROID
+
+void ANDROIDAUDIO_ResumeDevices(void);
+void ANDROIDAUDIO_PauseDevices(void);
+
+#else
+
+static void ANDROIDAUDIO_ResumeDevices(void) {}
+static void ANDROIDAUDIO_PauseDevices(void) {}
+
+#endif
+
+#endif // SDL_androidaudio_h_

vendor/sdl-3.0.0/src/audio/coreaudio/SDL_coreaudio.h

@@ -0,0 +1,68 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_coreaudio_h_
+#define SDL_coreaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+#ifndef __IOS__
+#define MACOSX_COREAUDIO
+#endif
+
+#ifdef MACOSX_COREAUDIO
+#include <CoreAudio/CoreAudio.h>
+#else
+#import <AVFoundation/AVFoundation.h>
+#import <UIKit/UIApplication.h>
+#endif
+
+#include <AudioToolbox/AudioToolbox.h>
+#include <AudioUnit/AudioUnit.h>
+
+// Things named "Master" were renamed to "Main" in macOS 12.0's SDK.
+#ifdef MACOSX_COREAUDIO
+#include <AvailabilityMacros.h>
+#ifndef MAC_OS_VERSION_12_0
+#define kAudioObjectPropertyElementMain kAudioObjectPropertyElementMaster
+#endif
+#endif
+
+struct SDL_PrivateAudioData
+{
+    SDL_Thread *thread;
+    AudioQueueRef audioQueue;
+    int numAudioBuffers;
+    AudioQueueBufferRef *audioBuffer;
+    AudioQueueBufferRef current_buffer;
+    AudioStreamBasicDescription strdesc;
+    SDL_Semaphore *ready_semaphore;
+    char *thread_error;
+#ifdef MACOSX_COREAUDIO
+    AudioDeviceID deviceID;
+#else
+    SDL_bool interrupted;
+    CFTypeRef interruption_listener;
+#endif
+};
+
+#endif // SDL_coreaudio_h_

vendor/sdl-3.0.0/src/audio/coreaudio/SDL_coreaudio.m

@@ -0,0 +1,979 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_COREAUDIO
+
+#include "../SDL_sysaudio.h"
+#include "SDL_coreaudio.h"
+#include "../../thread/SDL_systhread.h"
+
+#define DEBUG_COREAUDIO 0
+
+#if DEBUG_COREAUDIO
+    #define CHECK_RESULT(msg) \
+        if (result != noErr) { \
+            SDL_Log("COREAUDIO: Got error %d from '%s'!\n", (int)result, msg); \
+            return SDL_SetError("CoreAudio error (%s): %d", msg, (int)result); \
+        }
+#else
+    #define CHECK_RESULT(msg) \
+        if (result != noErr) { \
+            return SDL_SetError("CoreAudio error (%s): %d", msg, (int)result); \
+        }
+#endif
+
+#ifdef MACOSX_COREAUDIO
+static const AudioObjectPropertyAddress devlist_address = {
+    kAudioHardwarePropertyDevices,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMain
+};
+
+static const AudioObjectPropertyAddress default_output_device_address = {
+    kAudioHardwarePropertyDefaultOutputDevice,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMain
+};
+
+static const AudioObjectPropertyAddress default_input_device_address = {
+    kAudioHardwarePropertyDefaultInputDevice,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMain
+};
+
+static const AudioObjectPropertyAddress alive_address = {
+    kAudioDevicePropertyDeviceIsAlive,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMain
+};
+
+
+static OSStatus DeviceAliveNotification(AudioObjectID devid, UInt32 num_addr, const AudioObjectPropertyAddress *addrs, void *data)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)data;
+    SDL_assert(((AudioObjectID)(size_t)device->handle) == devid);
+
+    UInt32 alive = 1;
+    UInt32 size = sizeof(alive);
+    const OSStatus error = AudioObjectGetPropertyData(devid, addrs, 0, NULL, &size, &alive);
+
+    SDL_bool dead = SDL_FALSE;
+    if (error == kAudioHardwareBadDeviceError) {
+        dead = SDL_TRUE; // device was unplugged.
+    } else if ((error == kAudioHardwareNoError) && (!alive)) {
+        dead = SDL_TRUE; // device died in some other way.
+    }
+
+    if (dead) {
+        #if DEBUG_COREAUDIO
+        SDL_Log("COREAUDIO: device '%s' is lost!", device->name);
+        #endif
+        SDL_AudioDeviceDisconnected(device);
+    }
+
+    return noErr;
+}
+
+static void COREAUDIO_FreeDeviceHandle(SDL_AudioDevice *device)
+{
+    const AudioDeviceID devid = (AudioDeviceID)(size_t)device->handle;
+    AudioObjectRemovePropertyListener(devid, &alive_address, DeviceAliveNotification, device);
+}
+
+// This only _adds_ new devices. Removal is handled by devices triggering kAudioDevicePropertyDeviceIsAlive property changes.
+static void RefreshPhysicalDevices(void)
+{
+    UInt32 size = 0;
+    AudioDeviceID *devs = NULL;
+    SDL_bool isstack;
+
+    if (AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &devlist_address, 0, NULL, &size) != kAudioHardwareNoError) {
+        return;
+    } else if ((devs = (AudioDeviceID *) SDL_small_alloc(Uint8, size, &isstack)) == NULL) {
+        return;
+    } else if (AudioObjectGetPropertyData(kAudioObjectSystemObject, &devlist_address, 0, NULL, &size, devs) != kAudioHardwareNoError) {
+        SDL_small_free(devs, isstack);
+        return;
+    }
+
+    const UInt32 total_devices = (UInt32) (size / sizeof(AudioDeviceID));
+    for (UInt32 i = 0; i < total_devices; i++) {
+        SDL_AudioDevice *device = SDL_FindPhysicalAudioDeviceByHandle((void *)((size_t)devs[i]));
+        if (device) {
+            devs[i] = 0;  // The system and SDL both agree it's already here, don't check it again.
+        }
+    }
+
+    // any non-zero items remaining in `devs` are new devices to be added.
+    for (int iscapture = 0; iscapture < 2; iscapture++) {
+        const AudioObjectPropertyAddress addr = {
+            kAudioDevicePropertyStreamConfiguration,
+            iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
+            kAudioObjectPropertyElementMain
+        };
+        const AudioObjectPropertyAddress nameaddr = {
+            kAudioObjectPropertyName,
+            iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
+            kAudioObjectPropertyElementMain
+        };
+        const AudioObjectPropertyAddress freqaddr = {
+            kAudioDevicePropertyNominalSampleRate,
+            iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
+            kAudioObjectPropertyElementMain
+        };
+
+        for (UInt32 i = 0; i < total_devices; i++) {
+            const AudioDeviceID dev = devs[i];
+            if (!dev) {
+                continue;  // already added.
+            }
+
+            AudioBufferList *buflist = NULL;
+            double sampleRate = 0;
+
+            if (AudioObjectGetPropertyDataSize(dev, &addr, 0, NULL, &size) != noErr) {
+                continue;
+            } else if ((buflist = (AudioBufferList *)SDL_malloc(size)) == NULL) {
+                continue;
+            }
+
+            OSStatus result = AudioObjectGetPropertyData(dev, &addr, 0, NULL, &size, buflist);
+
+            SDL_AudioSpec spec;
+            SDL_zero(spec);
+            if (result == noErr) {
+                for (Uint32 j = 0; j < buflist->mNumberBuffers; j++) {
+                    spec.channels += buflist->mBuffers[j].mNumberChannels;
+                }
+            }
+
+            SDL_free(buflist);
+
+            if (spec.channels == 0) {
+                continue;
+            }
+
+            size = sizeof(sampleRate);
+            if (AudioObjectGetPropertyData(dev, &freqaddr, 0, NULL, &size, &sampleRate) == noErr) {
+                spec.freq = (int)sampleRate;
+            }
+
+            CFStringRef cfstr = NULL;
+            size = sizeof(CFStringRef);
+            if (AudioObjectGetPropertyData(dev, &nameaddr, 0, NULL, &size, &cfstr) != kAudioHardwareNoError) {
+                continue;
+            }
+
+            CFIndex len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr), kCFStringEncodingUTF8);
+            char *name = (char *)SDL_malloc(len + 1);
+            SDL_bool usable = ((name != NULL) && (CFStringGetCString(cfstr, name, len + 1, kCFStringEncodingUTF8))) ? SDL_TRUE : SDL_FALSE;
+
+            CFRelease(cfstr);
+
+            if (usable) {
+                // Some devices have whitespace at the end...trim it.
+                len = (CFIndex) SDL_strlen(name);
+                while ((len > 0) && (name[len - 1] == ' ')) {
+                    len--;
+                }
+                usable = (len > 0);
+            }
+
+            if (usable) {
+                name[len] = '\0';
+
+                #if DEBUG_COREAUDIO
+                SDL_Log("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
+                       ((iscapture) ? "capture" : "output"),
+                       (int)i, name, (int)dev);
+                #endif
+
+                devs[i] = 0;  // don't bother checking this one on the next iscapture iteration of the loop
+
+                SDL_AudioDevice *device = SDL_AddAudioDevice(iscapture ? SDL_TRUE : SDL_FALSE, name, &spec, (void *)((size_t)dev));
+                if (device) {
+                    AudioObjectAddPropertyListener(dev, &alive_address, DeviceAliveNotification, device);
+                }
+            }
+            SDL_free(name); // SDL_AddAudioDevice() would have copied the string.
+        }
+    }
+
+    SDL_small_free(devs, isstack);
+}
+
+// this is called when the system's list of available audio devices changes.
+static OSStatus DeviceListChangedNotification(AudioObjectID systemObj, UInt32 num_addr, const AudioObjectPropertyAddress *addrs, void *data)
+{
+    RefreshPhysicalDevices();
+    return noErr;
+}
+
+static OSStatus DefaultAudioDeviceChangedNotification(AudioObjectID inObjectID, const AudioObjectPropertyAddress *addr)
+{
+    AudioDeviceID devid;
+    Uint32 size = sizeof(devid);
+    if (AudioObjectGetPropertyData(inObjectID, addr, 0, NULL, &size, &devid) == noErr) {
+        SDL_DefaultAudioDeviceChanged(SDL_FindPhysicalAudioDeviceByHandle((void *)((size_t)devid)));
+    }
+    return noErr;
+}
+
+static OSStatus DefaultOutputDeviceChangedNotification(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *inUserData)
+{
+    #if DEBUG_COREAUDIO
+    SDL_Log("COREAUDIO: default output device changed!");
+    #endif
+    SDL_assert(inNumberAddresses == 1);
+    return DefaultAudioDeviceChangedNotification(inObjectID, inAddresses);
+}
+
+static OSStatus DefaultInputDeviceChangedNotification(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *inUserData)
+{
+    #if DEBUG_COREAUDIO
+    SDL_Log("COREAUDIO: default input device changed!");
+    #endif
+    SDL_assert(inNumberAddresses == 1);
+    return DefaultAudioDeviceChangedNotification(inObjectID, inAddresses);
+}
+
+static void COREAUDIO_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    RefreshPhysicalDevices();
+
+    AudioObjectAddPropertyListener(kAudioObjectSystemObject, &devlist_address, DeviceListChangedNotification, NULL);
+
+    // Get the Device ID
+    UInt32 size;
+    AudioDeviceID devid;
+
+    size = sizeof(AudioDeviceID);
+    if (AudioObjectGetPropertyData(kAudioObjectSystemObject, &default_output_device_address, 0, NULL, &size, &devid) == noErr) {
+        SDL_AudioDevice *device = SDL_FindPhysicalAudioDeviceByHandle((void *)((size_t)devid));
+        if (device) {
+            *default_output = device;
+        }
+    }
+    AudioObjectAddPropertyListener(kAudioObjectSystemObject, &default_output_device_address, DefaultOutputDeviceChangedNotification, NULL);
+
+    size = sizeof(AudioDeviceID);
+    if (AudioObjectGetPropertyData(kAudioObjectSystemObject, &default_input_device_address, 0, NULL, &size, &devid) == noErr) {
+        SDL_AudioDevice *device = SDL_FindPhysicalAudioDeviceByHandle((void *)((size_t)devid));
+        if (device) {
+            *default_capture = device;
+        }
+    }
+    AudioObjectAddPropertyListener(kAudioObjectSystemObject, &default_input_device_address, DefaultInputDeviceChangedNotification, NULL);
+}
+
+#else  // iOS-specific section follows.
+
+static SDL_bool session_active = SDL_FALSE;
+
+static SDL_bool PauseOneAudioDevice(SDL_AudioDevice *device, void *userdata)
+{
+    if (device->hidden && device->hidden->audioQueue && !device->hidden->interrupted) {
+        AudioQueuePause(device->hidden->audioQueue);
+    }
+    return SDL_FALSE;  // keep enumerating devices until we've paused them all.
+}
+
+static void PauseAudioDevices(void)
+{
+    (void) SDL_FindPhysicalAudioDeviceByCallback(PauseOneAudioDevice, NULL);
+}
+
+static SDL_bool ResumeOneAudioDevice(SDL_AudioDevice *device, void *userdata)
+{
+    if (device->hidden && device->hidden->audioQueue && !device->hidden->interrupted) {
+        AudioQueueStart(device->hidden->audioQueue, NULL);
+    }
+    return SDL_FALSE;  // keep enumerating devices until we've resumed them all.
+}
+
+static void ResumeAudioDevices(void)
+{
+    (void) SDL_FindPhysicalAudioDeviceByCallback(ResumeOneAudioDevice, NULL);
+}
+
+static void InterruptionBegin(SDL_AudioDevice *device)
+{
+    if (device != NULL && device->hidden->audioQueue != NULL) {
+        device->hidden->interrupted = SDL_TRUE;
+        AudioQueuePause(device->hidden->audioQueue);
+    }
+}
+
+static void InterruptionEnd(SDL_AudioDevice *device)
+{
+    if (device != NULL && device->hidden != NULL && device->hidden->audioQueue != NULL && device->hidden->interrupted && AudioQueueStart(device->hidden->audioQueue, NULL) == AVAudioSessionErrorCodeNone) {
+        device->hidden->interrupted = SDL_FALSE;
+    }
+}
+
+@interface SDLInterruptionListener : NSObject
+
+@property(nonatomic, assign) SDL_AudioDevice *device;
+
+@end
+
+@implementation SDLInterruptionListener
+
+- (void)audioSessionInterruption:(NSNotification *)note
+{
+    @synchronized(self) {
+        NSNumber *type = note.userInfo[AVAudioSessionInterruptionTypeKey];
+        if (type.unsignedIntegerValue == AVAudioSessionInterruptionTypeBegan) {
+            InterruptionBegin(self.device);
+        } else {
+            InterruptionEnd(self.device);
+        }
+    }
+}
+
+- (void)applicationBecameActive:(NSNotification *)note
+{
+    @synchronized(self) {
+        InterruptionEnd(self.device);
+    }
+}
+
+@end
+
+typedef struct
+{
+    int output;
+    int capture;
+} CountOpenAudioDevicesData;
+
+static SDL_bool CountOpenAudioDevices(SDL_AudioDevice *device, void *userdata)
+{
+    CountOpenAudioDevicesData *data = (CountOpenAudioDevicesData *) userdata;
+    if (device->hidden != NULL) {  // assume it's open if hidden != NULL
+        if (device->iscapture) {
+            data->capture++;
+        } else {
+            data->output++;
+        }
+    }
+    return SDL_FALSE;  // keep enumerating until all devices have been checked.
+}
+
+static SDL_bool UpdateAudioSession(SDL_AudioDevice *device, SDL_bool open, SDL_bool allow_playandrecord)
+{
+    @autoreleasepool {
+        AVAudioSession *session = [AVAudioSession sharedInstance];
+        NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
+
+        NSString *category = AVAudioSessionCategoryPlayback;
+        NSString *mode = AVAudioSessionModeDefault;
+        NSUInteger options = AVAudioSessionCategoryOptionMixWithOthers;
+        NSError *err = nil;
+        const char *hint;
+
+        CountOpenAudioDevicesData data;
+        SDL_zero(data);
+        (void) SDL_FindPhysicalAudioDeviceByCallback(CountOpenAudioDevices, &data);
+
+        hint = SDL_GetHint(SDL_HINT_AUDIO_CATEGORY);
+        if (hint) {
+            if (SDL_strcasecmp(hint, "AVAudioSessionCategoryAmbient") == 0) {
+                category = AVAudioSessionCategoryAmbient;
+            } else if (SDL_strcasecmp(hint, "AVAudioSessionCategorySoloAmbient") == 0) {
+                category = AVAudioSessionCategorySoloAmbient;
+                options &= ~AVAudioSessionCategoryOptionMixWithOthers;
+            } else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayback") == 0 ||
+                       SDL_strcasecmp(hint, "playback") == 0) {
+                category = AVAudioSessionCategoryPlayback;
+                options &= ~AVAudioSessionCategoryOptionMixWithOthers;
+            } else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayAndRecord") == 0 ||
+                       SDL_strcasecmp(hint, "playandrecord") == 0) {
+                if (allow_playandrecord) {
+                    category = AVAudioSessionCategoryPlayAndRecord;
+                }
+            }
+        } else if (data.output && data.capture) {
+            category = AVAudioSessionCategoryPlayAndRecord;
+        } else if (data.capture) {
+            category = AVAudioSessionCategoryRecord;
+        }
+
+        #if !TARGET_OS_TV
+        if (category == AVAudioSessionCategoryPlayAndRecord) {
+            options |= AVAudioSessionCategoryOptionDefaultToSpeaker;
+        }
+        #endif
+        if (category == AVAudioSessionCategoryRecord ||
+            category == AVAudioSessionCategoryPlayAndRecord) {
+            /* AVAudioSessionCategoryOptionAllowBluetooth isn't available in the SDK for
+               Apple TV but is still needed in order to output to Bluetooth devices.
+             */
+            options |= 0x4; // AVAudioSessionCategoryOptionAllowBluetooth;
+        }
+        if (category == AVAudioSessionCategoryPlayAndRecord) {
+            options |= AVAudioSessionCategoryOptionAllowBluetoothA2DP |
+                       AVAudioSessionCategoryOptionAllowAirPlay;
+        }
+        if (category == AVAudioSessionCategoryPlayback ||
+            category == AVAudioSessionCategoryPlayAndRecord) {
+            options |= AVAudioSessionCategoryOptionDuckOthers;
+        }
+
+        if ([session respondsToSelector:@selector(setCategory:mode:options:error:)]) {
+            if (![session.category isEqualToString:category] || session.categoryOptions != options) {
+                // Stop the current session so we don't interrupt other application audio
+                PauseAudioDevices();
+                [session setActive:NO error:nil];
+                session_active = SDL_FALSE;
+
+                if (![session setCategory:category mode:mode options:options error:&err]) {
+                    NSString *desc = err.description;
+                    SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
+                    return SDL_FALSE;
+                }
+            }
+        } else {
+            if (![session.category isEqualToString:category]) {
+                // Stop the current session so we don't interrupt other application audio
+                PauseAudioDevices();
+                [session setActive:NO error:nil];
+                session_active = SDL_FALSE;
+
+                if (![session setCategory:category error:&err]) {
+                    NSString *desc = err.description;
+                    SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
+                    return SDL_FALSE;
+                }
+            }
+        }
+
+        if ((data.output || data.capture) && !session_active) {
+            if (![session setActive:YES error:&err]) {
+                if ([err code] == AVAudioSessionErrorCodeResourceNotAvailable &&
+                    category == AVAudioSessionCategoryPlayAndRecord) {
+                    return UpdateAudioSession(device, open, SDL_FALSE);
+                }
+
+                NSString *desc = err.description;
+                SDL_SetError("Could not activate Audio Session: %s", desc.UTF8String);
+                return SDL_FALSE;
+            }
+            session_active = SDL_TRUE;
+            ResumeAudioDevices();
+        } else if (!data.output && !data.capture && session_active) {
+            PauseAudioDevices();
+            [session setActive:NO error:nil];
+            session_active = SDL_FALSE;
+        }
+
+        if (open) {
+            SDLInterruptionListener *listener = [SDLInterruptionListener new];
+            listener.device = device;
+
+            [center addObserver:listener
+                       selector:@selector(audioSessionInterruption:)
+                           name:AVAudioSessionInterruptionNotification
+                         object:session];
+
+            /* An interruption end notification is not guaranteed to be sent if
+             we were previously interrupted... resuming if needed when the app
+             becomes active seems to be the way to go. */
+            // Note: object: below needs to be nil, as otherwise it filters by the object, and session doesn't send foreground / active notifications.
+            [center addObserver:listener
+                       selector:@selector(applicationBecameActive:)
+                           name:UIApplicationDidBecomeActiveNotification
+                         object:nil];
+
+            [center addObserver:listener
+                       selector:@selector(applicationBecameActive:)
+                           name:UIApplicationWillEnterForegroundNotification
+                         object:nil];
+
+            device->hidden->interruption_listener = CFBridgingRetain(listener);
+        } else {
+            SDLInterruptionListener *listener = nil;
+            listener = (SDLInterruptionListener *)CFBridgingRelease(device->hidden->interruption_listener);
+            [center removeObserver:listener];
+            @synchronized(listener) {
+                listener.device = NULL;
+            }
+        }
+    }
+
+    return SDL_TRUE;
+}
+#endif
+
+
+static int COREAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    AudioQueueBufferRef current_buffer = device->hidden->current_buffer;
+    SDL_assert(current_buffer != NULL);  // should have been called from OutputBufferReadyCallback
+    SDL_assert(buffer == (Uint8 *) current_buffer->mAudioData);
+    current_buffer->mAudioDataByteSize = current_buffer->mAudioDataBytesCapacity;
+    device->hidden->current_buffer = NULL;
+    AudioQueueEnqueueBuffer(device->hidden->audioQueue, current_buffer, 0, NULL);
+    return 0;
+}
+
+static Uint8 *COREAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    AudioQueueBufferRef current_buffer = device->hidden->current_buffer;
+    SDL_assert(current_buffer != NULL);  // should have been called from OutputBufferReadyCallback
+    SDL_assert(current_buffer->mAudioData != NULL);
+    *buffer_size = (int) current_buffer->mAudioDataBytesCapacity;
+    return (Uint8 *) current_buffer->mAudioData;
+}
+
+static void OutputBufferReadyCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)inUserData;
+    SDL_assert(inBuffer != NULL);  // ...right?
+    SDL_assert(device->hidden->current_buffer == NULL);  // shouldn't have anything pending
+    device->hidden->current_buffer = inBuffer;
+    const SDL_bool okay = SDL_OutputAudioThreadIterate(device);
+    SDL_assert((device->hidden->current_buffer == NULL) || !okay);  // PlayDevice should have enqueued and cleaned it out, unless we failed or shutdown.
+
+    // buffer is unexpectedly here? We're probably dying, but try to requeue this buffer with silence.
+    if (device->hidden->current_buffer) {
+        AudioQueueBufferRef current_buffer = device->hidden->current_buffer;
+        device->hidden->current_buffer = NULL;
+        SDL_memset(current_buffer->mAudioData, device->silence_value, (size_t) current_buffer->mAudioDataBytesCapacity);
+        AudioQueueEnqueueBuffer(device->hidden->audioQueue, current_buffer, 0, NULL);
+    }
+}
+
+static int COREAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    AudioQueueBufferRef current_buffer = device->hidden->current_buffer;
+    SDL_assert(current_buffer != NULL);  // should have been called from InputBufferReadyCallback
+    SDL_assert(current_buffer->mAudioData != NULL);
+    SDL_assert(buflen >= (int) current_buffer->mAudioDataByteSize);  // `cpy` makes sure this won't overflow a buffer, but we _will_ drop samples if this assertion fails!
+    const int cpy = SDL_min(buflen, (int) current_buffer->mAudioDataByteSize);
+    SDL_memcpy(buffer, current_buffer->mAudioData, cpy);
+    device->hidden->current_buffer = NULL;
+    AudioQueueEnqueueBuffer(device->hidden->audioQueue, current_buffer, 0, NULL);  // requeue for capturing more data later.
+    return cpy;
+}
+
+static void COREAUDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    AudioQueueBufferRef current_buffer = device->hidden->current_buffer;
+    if (current_buffer != NULL) {  // also gets called at shutdown, when no buffer is available.
+        // just requeue the current buffer without reading from it, so it can be refilled with new data later.
+        device->hidden->current_buffer = NULL;
+        AudioQueueEnqueueBuffer(device->hidden->audioQueue, current_buffer, 0, NULL);
+    }
+}
+
+static void InputBufferReadyCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer,
+                          const AudioTimeStamp *inStartTime, UInt32 inNumberPacketDescriptions,
+                          const AudioStreamPacketDescription *inPacketDescs)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)inUserData;
+    SDL_assert(inAQ == device->hidden->audioQueue);
+    SDL_assert(inBuffer != NULL);  // ...right?
+    SDL_assert(device->hidden->current_buffer == NULL);  // shouldn't have anything pending
+    device->hidden->current_buffer = inBuffer;
+    SDL_CaptureAudioThreadIterate(device);
+    SDL_assert(device->hidden->current_buffer == NULL);  // CaptureFromDevice/FlushCapture should have enqueued and cleaned it out.
+}
+
+static void COREAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (!device->hidden) {
+        return;
+    }
+
+    // dispose of the audio queue before waiting on the thread, or it might stall for a long time!
+    if (device->hidden->audioQueue) {
+        AudioQueueFlush(device->hidden->audioQueue);
+        AudioQueueStop(device->hidden->audioQueue, 0);
+        AudioQueueDispose(device->hidden->audioQueue, 0);
+    }
+
+    if (device->hidden->thread) {
+        SDL_assert(SDL_AtomicGet(&device->shutdown) != 0); // should have been set by SDL_audio.c
+        SDL_WaitThread(device->hidden->thread, NULL);
+    }
+
+    #ifndef MACOSX_COREAUDIO
+    UpdateAudioSession(device, SDL_FALSE, SDL_TRUE);
+    #endif
+
+    if (device->hidden->ready_semaphore) {
+        SDL_DestroySemaphore(device->hidden->ready_semaphore);
+    }
+
+    // AudioQueueDispose() frees the actual buffer objects.
+    SDL_free(device->hidden->audioBuffer);
+    SDL_free(device->hidden->thread_error);
+    SDL_free(device->hidden);
+}
+
+#ifdef MACOSX_COREAUDIO
+static int PrepareDevice(SDL_AudioDevice *device)
+{
+    void *handle = device->handle;
+    SDL_assert(handle != NULL);  // this meant "system default" in SDL2, but doesn't anymore
+
+    const AudioDeviceID devid = (AudioDeviceID)((size_t)handle);
+    OSStatus result = noErr;
+    UInt32 size = 0;
+
+    AudioObjectPropertyAddress addr = {
+        0,
+        kAudioObjectPropertyScopeGlobal,
+        kAudioObjectPropertyElementMain
+    };
+
+    UInt32 alive = 0;
+    size = sizeof(alive);
+    addr.mSelector = kAudioDevicePropertyDeviceIsAlive;
+    addr.mScope = device->iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput;
+    result = AudioObjectGetPropertyData(devid, &addr, 0, NULL, &size, &alive);
+    CHECK_RESULT("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
+    if (!alive) {
+        return SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
+    }
+
+    // some devices don't support this property, so errors are fine here.
+    pid_t pid = 0;
+    size = sizeof(pid);
+    addr.mSelector = kAudioDevicePropertyHogMode;
+    result = AudioObjectGetPropertyData(devid, &addr, 0, NULL, &size, &pid);
+    if ((result == noErr) && (pid != -1)) {
+        return SDL_SetError("CoreAudio: requested device is being hogged.");
+    }
+
+    device->hidden->deviceID = devid;
+
+    return 0;
+}
+
+static int AssignDeviceToAudioQueue(SDL_AudioDevice *device)
+{
+    const AudioObjectPropertyAddress prop = {
+        kAudioDevicePropertyDeviceUID,
+        device->iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
+        kAudioObjectPropertyElementMain
+    };
+
+    OSStatus result;
+    CFStringRef devuid;
+    UInt32 devuidsize = sizeof(devuid);
+    result = AudioObjectGetPropertyData(device->hidden->deviceID, &prop, 0, NULL, &devuidsize, &devuid);
+    CHECK_RESULT("AudioObjectGetPropertyData (kAudioDevicePropertyDeviceUID)");
+    result = AudioQueueSetProperty(device->hidden->audioQueue, kAudioQueueProperty_CurrentDevice, &devuid, devuidsize);
+    CHECK_RESULT("AudioQueueSetProperty (kAudioQueueProperty_CurrentDevice)");
+
+    // !!! FIXME: do we need to CFRelease(devuid)?
+
+    return 0;
+}
+#endif
+
+static int PrepareAudioQueue(SDL_AudioDevice *device)
+{
+    const AudioStreamBasicDescription *strdesc = &device->hidden->strdesc;
+    const SDL_bool iscapture = device->iscapture;
+    OSStatus result;
+
+    SDL_assert(CFRunLoopGetCurrent() != NULL);
+
+    if (iscapture) {
+        result = AudioQueueNewInput(strdesc, InputBufferReadyCallback, device, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode, 0, &device->hidden->audioQueue);
+        CHECK_RESULT("AudioQueueNewInput");
+    } else {
+        result = AudioQueueNewOutput(strdesc, OutputBufferReadyCallback, device, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode, 0, &device->hidden->audioQueue);
+        CHECK_RESULT("AudioQueueNewOutput");
+    }
+
+    #ifdef MACOSX_COREAUDIO
+    if (AssignDeviceToAudioQueue(device) < 0) {
+        return -1;
+    }
+    #endif
+
+    SDL_UpdatedAudioDeviceFormat(device);  // make sure this is correct.
+
+    // Set the channel layout for the audio queue
+    AudioChannelLayout layout;
+    SDL_zero(layout);
+    switch (device->spec.channels) {
+    case 1:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
+        break;
+    case 2:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
+        break;
+    case 3:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4;
+        break;
+    case 4:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_Quadraphonic;
+        break;
+    case 5:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_5_0_A;
+        break;
+    case 6:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_5_1_A;
+        break;
+    case 7:
+        // FIXME: Need to move channel[4] (BC) to channel[6]
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A;
+        break;
+    case 8:
+        layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A;
+        break;
+    }
+    if (layout.mChannelLayoutTag != 0) {
+        result = AudioQueueSetProperty(device->hidden->audioQueue, kAudioQueueProperty_ChannelLayout, &layout, sizeof(layout));
+        CHECK_RESULT("AudioQueueSetProperty(kAudioQueueProperty_ChannelLayout)");
+    }
+
+    // Make sure we can feed the device a minimum amount of time
+    double MINIMUM_AUDIO_BUFFER_TIME_MS = 15.0;
+    #ifdef __IOS__
+    if (SDL_floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
+        // Older iOS hardware, use 40 ms as a minimum time
+        MINIMUM_AUDIO_BUFFER_TIME_MS = 40.0;
+    }
+    #endif
+
+    int numAudioBuffers = 2;
+    const double msecs = (device->sample_frames / ((double)device->spec.freq)) * 1000.0;
+    if (msecs < MINIMUM_AUDIO_BUFFER_TIME_MS) { // use more buffers if we have a VERY small sample set.
+        numAudioBuffers = ((int)SDL_ceil(MINIMUM_AUDIO_BUFFER_TIME_MS / msecs) * 2);
+    }
+
+    device->hidden->numAudioBuffers = numAudioBuffers;
+    device->hidden->audioBuffer = SDL_calloc(numAudioBuffers, sizeof(AudioQueueBufferRef));
+    if (device->hidden->audioBuffer == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    #if DEBUG_COREAUDIO
+    SDL_Log("COREAUDIO: numAudioBuffers == %d\n", numAudioBuffers);
+    #endif
+
+    for (int i = 0; i < numAudioBuffers; i++) {
+        result = AudioQueueAllocateBuffer(device->hidden->audioQueue, device->buffer_size, &device->hidden->audioBuffer[i]);
+        CHECK_RESULT("AudioQueueAllocateBuffer");
+        SDL_memset(device->hidden->audioBuffer[i]->mAudioData, device->silence_value, device->hidden->audioBuffer[i]->mAudioDataBytesCapacity);
+        device->hidden->audioBuffer[i]->mAudioDataByteSize = device->hidden->audioBuffer[i]->mAudioDataBytesCapacity;
+        // !!! FIXME: should we use AudioQueueEnqueueBufferWithParameters and specify all frames be "trimmed" so these are immediately ready to refill with SDL callback data?
+        result = AudioQueueEnqueueBuffer(device->hidden->audioQueue, device->hidden->audioBuffer[i], 0, NULL);
+        CHECK_RESULT("AudioQueueEnqueueBuffer");
+    }
+
+    result = AudioQueueStart(device->hidden->audioQueue, NULL);
+    CHECK_RESULT("AudioQueueStart");
+
+    return 0;  // We're running!
+}
+
+static int AudioQueueThreadEntry(void *arg)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)arg;
+
+    if (device->iscapture) {
+        SDL_CaptureAudioThreadSetup(device);
+    } else {
+        SDL_OutputAudioThreadSetup(device);
+    }
+
+    if (PrepareAudioQueue(device) < 0) {
+        device->hidden->thread_error = SDL_strdup(SDL_GetError());
+        SDL_PostSemaphore(device->hidden->ready_semaphore);
+        return 0;
+    }
+
+    // init was successful, alert parent thread and start running...
+    SDL_PostSemaphore(device->hidden->ready_semaphore);
+
+    // This would be WaitDevice/WaitCaptureDevice in the normal SDL audio thread, but we get *BufferReadyCallback calls here to know when to iterate.
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.10, 1);
+    }
+
+    if (device->iscapture) {
+        SDL_CaptureAudioThreadShutdown(device);
+    } else {
+        // Drain off any pending playback.
+        const CFTimeInterval secs = (((CFTimeInterval)device->sample_frames) / ((CFTimeInterval)device->spec.freq)) * 2.0;
+        CFRunLoopRunInMode(kCFRunLoopDefaultMode, secs, 0);
+        SDL_OutputAudioThreadShutdown(device);
+    }
+
+    return 0;
+}
+
+static int COREAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    #ifndef MACOSX_COREAUDIO
+    if (!UpdateAudioSession(device, SDL_TRUE, SDL_TRUE)) {
+        return -1;
+    }
+
+    // Stop CoreAudio from doing expensive audio rate conversion
+    @autoreleasepool {
+        AVAudioSession *session = [AVAudioSession sharedInstance];
+        [session setPreferredSampleRate:device->spec.freq error:nil];
+        device->spec.freq = (int)session.sampleRate;
+        #if TARGET_OS_TV
+        if (device->iscapture) {
+            [session setPreferredInputNumberOfChannels:device->spec.channels error:nil];
+            device->spec.channels = session.preferredInputNumberOfChannels;
+        } else {
+            [session setPreferredOutputNumberOfChannels:device->spec.channels error:nil];
+            device->spec.channels = session.preferredOutputNumberOfChannels;
+        }
+        #else
+        // Calling setPreferredOutputNumberOfChannels seems to break audio output on iOS
+        #endif // TARGET_OS_TV
+    }
+    #endif
+
+    // Setup a AudioStreamBasicDescription with the requested format
+    AudioStreamBasicDescription *strdesc = &device->hidden->strdesc;
+    strdesc->mFormatID = kAudioFormatLinearPCM;
+    strdesc->mFormatFlags = kLinearPCMFormatFlagIsPacked;
+    strdesc->mChannelsPerFrame = device->spec.channels;
+    strdesc->mSampleRate = device->spec.freq;
+    strdesc->mFramesPerPacket = 1;
+
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    SDL_AudioFormat test_format;
+    while ((test_format = *(closefmts++)) != 0) {
+        // CoreAudio handles most of SDL's formats natively.
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+        case SDL_AUDIO_S8:
+        case SDL_AUDIO_S16LE:
+        case SDL_AUDIO_S16BE:
+        case SDL_AUDIO_S32LE:
+        case SDL_AUDIO_S32BE:
+        case SDL_AUDIO_F32LE:
+        case SDL_AUDIO_F32BE:
+            break;
+
+        default:
+            continue;
+        }
+        break;
+    }
+
+    if (!test_format) { // shouldn't happen, but just in case...
+        return SDL_SetError("%s: Unsupported audio format", "coreaudio");
+    }
+    device->spec.format = test_format;
+    strdesc->mBitsPerChannel = SDL_AUDIO_BITSIZE(test_format);
+    if (SDL_AUDIO_ISBIGENDIAN(test_format)) {
+        strdesc->mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
+    }
+
+    if (SDL_AUDIO_ISFLOAT(test_format)) {
+        strdesc->mFormatFlags |= kLinearPCMFormatFlagIsFloat;
+    } else if (SDL_AUDIO_ISSIGNED(test_format)) {
+        strdesc->mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
+    }
+
+    strdesc->mBytesPerFrame = strdesc->mChannelsPerFrame * strdesc->mBitsPerChannel / 8;
+    strdesc->mBytesPerPacket = strdesc->mBytesPerFrame * strdesc->mFramesPerPacket;
+
+#ifdef MACOSX_COREAUDIO
+    if (PrepareDevice(device) < 0) {
+        return -1;
+    }
+#endif
+
+    // This has to init in a new thread so it can get its own CFRunLoop. :/
+    device->hidden->ready_semaphore = SDL_CreateSemaphore(0);
+    if (!device->hidden->ready_semaphore) {
+        return -1; // oh well.
+    }
+
+    char threadname[64];
+    SDL_GetAudioThreadName(device, threadname, sizeof(threadname));
+    device->hidden->thread = SDL_CreateThreadInternal(AudioQueueThreadEntry, threadname, 0, device);
+    if (!device->hidden->thread) {
+        return -1;
+    }
+
+    SDL_WaitSemaphore(device->hidden->ready_semaphore);
+    SDL_DestroySemaphore(device->hidden->ready_semaphore);
+    device->hidden->ready_semaphore = NULL;
+
+    if ((device->hidden->thread != NULL) && (device->hidden->thread_error != NULL)) {
+        SDL_WaitThread(device->hidden->thread, NULL);
+        device->hidden->thread = NULL;
+        return SDL_SetError("%s", device->hidden->thread_error);
+    }
+
+    return (device->hidden->thread != NULL) ? 0 : -1;
+}
+
+static void COREAUDIO_DeinitializeStart(void)
+{
+#ifdef MACOSX_COREAUDIO
+    AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &devlist_address, DeviceListChangedNotification, NULL);
+    AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &default_output_device_address, DefaultOutputDeviceChangedNotification, NULL);
+    AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &default_input_device_address, DefaultInputDeviceChangedNotification, NULL);
+#endif
+}
+
+static SDL_bool COREAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = COREAUDIO_OpenDevice;
+    impl->PlayDevice = COREAUDIO_PlayDevice;
+    impl->GetDeviceBuf = COREAUDIO_GetDeviceBuf;
+    impl->CaptureFromDevice = COREAUDIO_CaptureFromDevice;
+    impl->FlushCapture = COREAUDIO_FlushCapture;
+    impl->CloseDevice = COREAUDIO_CloseDevice;
+    impl->DeinitializeStart = COREAUDIO_DeinitializeStart;
+
+#ifdef MACOSX_COREAUDIO
+    impl->DetectDevices = COREAUDIO_DetectDevices;
+    impl->FreeDeviceHandle = COREAUDIO_FreeDeviceHandle;
+#else
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+#endif
+
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap COREAUDIO_bootstrap = {
+    "coreaudio", "CoreAudio", COREAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_COREAUDIO

vendor/sdl-3.0.0/src/audio/directsound/SDL_directsound.c

@@ -0,0 +1,675 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_DSOUND
+
+#include "../SDL_sysaudio.h"
+#include "SDL_directsound.h"
+#include <mmreg.h>
+#ifdef HAVE_MMDEVICEAPI_H
+#include "../../core/windows/SDL_immdevice.h"
+#endif
+
+#ifndef WAVE_FORMAT_IEEE_FLOAT
+#define WAVE_FORMAT_IEEE_FLOAT 0x0003
+#endif
+
+// For Vista+, we can enumerate DSound devices with IMMDevice
+#ifdef HAVE_MMDEVICEAPI_H
+static SDL_bool SupportsIMMDevice = SDL_FALSE;
+#endif
+
+// DirectX function pointers for audio
+static void *DSoundDLL = NULL;
+typedef HRESULT(WINAPI *fnDirectSoundCreate8)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
+typedef HRESULT(WINAPI *fnDirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
+typedef HRESULT(WINAPI *fnDirectSoundCaptureCreate8)(LPCGUID, LPDIRECTSOUNDCAPTURE8 *, LPUNKNOWN);
+typedef HRESULT(WINAPI *fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
+typedef HRESULT(WINAPI *fnGetDeviceID)(LPCGUID, LPGUID);
+static fnDirectSoundCreate8 pDirectSoundCreate8 = NULL;
+static fnDirectSoundEnumerateW pDirectSoundEnumerateW = NULL;
+static fnDirectSoundCaptureCreate8 pDirectSoundCaptureCreate8 = NULL;
+static fnDirectSoundCaptureEnumerateW pDirectSoundCaptureEnumerateW = NULL;
+static fnGetDeviceID pGetDeviceID = NULL;
+
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+
+static void DSOUND_Unload(void)
+{
+    pDirectSoundCreate8 = NULL;
+    pDirectSoundEnumerateW = NULL;
+    pDirectSoundCaptureCreate8 = NULL;
+    pDirectSoundCaptureEnumerateW = NULL;
+    pGetDeviceID = NULL;
+
+    if (DSoundDLL != NULL) {
+        SDL_UnloadObject(DSoundDLL);
+        DSoundDLL = NULL;
+    }
+}
+
+static int DSOUND_Load(void)
+{
+    int loaded = 0;
+
+    DSOUND_Unload();
+
+    DSoundDLL = SDL_LoadObject("DSOUND.DLL");
+    if (DSoundDLL == NULL) {
+        SDL_SetError("DirectSound: failed to load DSOUND.DLL");
+    } else {
+// Now make sure we have DirectX 8 or better...
+#define DSOUNDLOAD(f)                                  \
+    {                                                  \
+        p##f = (fn##f)SDL_LoadFunction(DSoundDLL, #f); \
+        if (!p##f)                                     \
+            loaded = 0;                                \
+    }
+        loaded = 1; // will reset if necessary.
+        DSOUNDLOAD(DirectSoundCreate8);
+        DSOUNDLOAD(DirectSoundEnumerateW);
+        DSOUNDLOAD(DirectSoundCaptureCreate8);
+        DSOUNDLOAD(DirectSoundCaptureEnumerateW);
+        DSOUNDLOAD(GetDeviceID);
+#undef DSOUNDLOAD
+
+        if (!loaded) {
+            SDL_SetError("DirectSound: System doesn't appear to have DX8.");
+        }
+    }
+
+    if (!loaded) {
+        DSOUND_Unload();
+    }
+
+    return loaded;
+}
+
+static int SetDSerror(const char *function, int code)
+{
+    const char *error;
+
+    switch (code) {
+    case E_NOINTERFACE:
+        error = "Unsupported interface -- Is DirectX 8.0 or later installed?";
+        break;
+    case DSERR_ALLOCATED:
+        error = "Audio device in use";
+        break;
+    case DSERR_BADFORMAT:
+        error = "Unsupported audio format";
+        break;
+    case DSERR_BUFFERLOST:
+        error = "Mixing buffer was lost";
+        break;
+    case DSERR_CONTROLUNAVAIL:
+        error = "Control requested is not available";
+        break;
+    case DSERR_INVALIDCALL:
+        error = "Invalid call for the current state";
+        break;
+    case DSERR_INVALIDPARAM:
+        error = "Invalid parameter";
+        break;
+    case DSERR_NODRIVER:
+        error = "No audio device found";
+        break;
+    case DSERR_OUTOFMEMORY:
+        error = "Out of memory";
+        break;
+    case DSERR_PRIOLEVELNEEDED:
+        error = "Caller doesn't have priority";
+        break;
+    case DSERR_UNSUPPORTED:
+        error = "Function not supported";
+        break;
+    default:
+        error = "Unknown DirectSound error";
+        break;
+    }
+
+    return SDL_SetError("%s: %s (0x%x)", function, error, code);
+}
+
+static void DSOUND_FreeDeviceHandle(SDL_AudioDevice *device)
+{
+#ifdef HAVE_MMDEVICEAPI_H
+    if (SupportsIMMDevice) {
+        SDL_IMMDevice_FreeDeviceHandle(device);
+    } else
+#endif
+    {
+        SDL_free(device->handle);
+    }
+}
+
+// FindAllDevs is presumably only used on WinXP; Vista and later can use IMMDevice for better results.
+typedef struct FindAllDevsData
+{
+    SDL_bool iscapture;
+    SDL_AudioDevice **default_device;
+    LPCGUID default_device_guid;
+} FindAllDevsData;
+
+static BOOL CALLBACK FindAllDevs(LPGUID guid, LPCWSTR desc, LPCWSTR module, LPVOID userdata)
+{
+    FindAllDevsData *data = (FindAllDevsData *) userdata;
+    if (guid != NULL) { // skip default device
+        char *str = WIN_LookupAudioDeviceName(desc, guid);
+        if (str != NULL) {
+            LPGUID cpyguid = (LPGUID)SDL_malloc(sizeof(GUID));
+            if (cpyguid) {
+                SDL_copyp(cpyguid, guid);
+
+                /* Note that spec is NULL, because we are required to connect to the
+                 * device before getting the channel mask and output format, making
+                 * this information inaccessible at enumeration time
+                 */
+                SDL_AudioDevice *device = SDL_AddAudioDevice(data->iscapture, str, NULL, cpyguid);
+                if (device && data->default_device && data->default_device_guid) {
+                    if (SDL_memcmp(cpyguid, data->default_device_guid, sizeof (GUID)) == 0) {
+                        *data->default_device = device;
+                    }
+                }
+            }
+            SDL_free(str); // SDL_AddAudioDevice() makes a copy of this string.
+        }
+    }
+    return TRUE; // keep enumerating.
+}
+
+static void DSOUND_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+#ifdef HAVE_MMDEVICEAPI_H
+    if (SupportsIMMDevice) {
+        SDL_IMMDevice_EnumerateEndpoints(default_output, default_capture);
+    } else
+#endif
+    {
+        // Without IMMDevice, you can enumerate devices and figure out the default devices,
+        //  but you won't get device hotplug or default device change notifications. But this is
+        //  only for WinXP; Windows Vista and later should be using IMMDevice.
+        FindAllDevsData data;
+        GUID guid;
+
+        data.iscapture = SDL_TRUE;
+        data.default_device = default_capture;
+        data.default_device_guid = (pGetDeviceID(&DSDEVID_DefaultCapture, &guid) == DS_OK) ? &guid : NULL;
+        pDirectSoundCaptureEnumerateW(FindAllDevs, &data);
+
+        data.iscapture = SDL_FALSE;
+        data.default_device = default_output;
+        data.default_device_guid = (pGetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) ? &guid : NULL;
+        pDirectSoundEnumerateW(FindAllDevs, &data);
+    }
+
+}
+
+static int DSOUND_WaitDevice(SDL_AudioDevice *device)
+{
+    /* Semi-busy wait, since we have no way of getting play notification
+       on a primary mixing buffer located in hardware (DirectX 5.0)
+     */
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        DWORD status = 0;
+        DWORD cursor = 0;
+        DWORD junk = 0;
+        HRESULT result = DS_OK;
+
+        // Try to restore a lost sound buffer
+        IDirectSoundBuffer_GetStatus(device->hidden->mixbuf, &status);
+        if (status & DSBSTATUS_BUFFERLOST) {
+            IDirectSoundBuffer_Restore(device->hidden->mixbuf);
+        } else if (!(status & DSBSTATUS_PLAYING)) {
+            result = IDirectSoundBuffer_Play(device->hidden->mixbuf, 0, 0, DSBPLAY_LOOPING);
+        } else {
+            // Find out where we are playing
+            result = IDirectSoundBuffer_GetCurrentPosition(device->hidden->mixbuf, &junk, &cursor);
+            if ((result == DS_OK) && ((cursor / device->buffer_size) != device->hidden->lastchunk)) {
+                break;  // ready for next chunk!
+            }
+        }
+
+        if ((result != DS_OK) && (result != DSERR_BUFFERLOST)) {
+            return -1;
+        }
+
+        SDL_Delay(1);  // not ready yet; sleep a bit.
+    }
+
+    return 0;
+}
+
+static int DSOUND_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    // Unlock the buffer, allowing it to play
+    SDL_assert(buflen == device->buffer_size);
+    if (IDirectSoundBuffer_Unlock(device->hidden->mixbuf, (LPVOID) buffer, buflen, NULL, 0) != DS_OK) {
+        return -1;
+    }
+    return 0;
+}
+
+static Uint8 *DSOUND_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    DWORD cursor = 0;
+    DWORD junk = 0;
+    HRESULT result = DS_OK;
+
+    SDL_assert(*buffer_size == device->buffer_size);
+
+    // Figure out which blocks to fill next
+    device->hidden->locked_buf = NULL;
+    result = IDirectSoundBuffer_GetCurrentPosition(device->hidden->mixbuf,
+                                                   &junk, &cursor);
+    if (result == DSERR_BUFFERLOST) {
+        IDirectSoundBuffer_Restore(device->hidden->mixbuf);
+        result = IDirectSoundBuffer_GetCurrentPosition(device->hidden->mixbuf,
+                                                       &junk, &cursor);
+    }
+    if (result != DS_OK) {
+        SetDSerror("DirectSound GetCurrentPosition", result);
+        return NULL;
+    }
+    cursor /= device->buffer_size;
+#ifdef DEBUG_SOUND
+    // Detect audio dropouts
+    {
+        DWORD spot = cursor;
+        if (spot < device->hidden->lastchunk) {
+            spot += device->hidden->num_buffers;
+        }
+        if (spot > device->hidden->lastchunk + 1) {
+            fprintf(stderr, "Audio dropout, missed %d fragments\n",
+                    (spot - (device->hidden->lastchunk + 1)));
+        }
+    }
+#endif
+    device->hidden->lastchunk = cursor;
+    cursor = (cursor + 1) % device->hidden->num_buffers;
+    cursor *= device->buffer_size;
+
+    // Lock the audio buffer
+    DWORD rawlen = 0;
+    result = IDirectSoundBuffer_Lock(device->hidden->mixbuf, cursor,
+                                     device->buffer_size,
+                                     (LPVOID *)&device->hidden->locked_buf,
+                                     &rawlen, NULL, &junk, 0);
+    if (result == DSERR_BUFFERLOST) {
+        IDirectSoundBuffer_Restore(device->hidden->mixbuf);
+        result = IDirectSoundBuffer_Lock(device->hidden->mixbuf, cursor,
+                                         device->buffer_size,
+                                         (LPVOID *)&device->hidden->locked_buf, &rawlen, NULL,
+                                         &junk, 0);
+    }
+    if (result != DS_OK) {
+        SetDSerror("DirectSound Lock", result);
+        return NULL;
+    }
+    return device->hidden->locked_buf;
+}
+
+static int DSOUND_WaitCaptureDevice(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        DWORD junk, cursor;
+        if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) != DS_OK) {
+            return -1;
+        } else if ((cursor / device->buffer_size) != h->lastchunk) {
+            break;
+        }
+        SDL_Delay(1);
+    }
+
+    return 0;
+}
+
+static int DSOUND_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    DWORD ptr1len, ptr2len;
+    VOID *ptr1, *ptr2;
+
+    SDL_assert(buflen == device->buffer_size);
+
+    if (IDirectSoundCaptureBuffer_Lock(h->capturebuf, h->lastchunk * buflen, buflen, &ptr1, &ptr1len, &ptr2, &ptr2len, 0) != DS_OK) {
+        return -1;
+    }
+
+    SDL_assert(ptr1len == (DWORD)buflen);
+    SDL_assert(ptr2 == NULL);
+    SDL_assert(ptr2len == 0);
+
+    SDL_memcpy(buffer, ptr1, ptr1len);
+
+    if (IDirectSoundCaptureBuffer_Unlock(h->capturebuf, ptr1, ptr1len, ptr2, ptr2len) != DS_OK) {
+        return -1;
+    }
+
+    h->lastchunk = (h->lastchunk + 1) % h->num_buffers;
+
+    return (int) ptr1len;
+}
+
+static void DSOUND_FlushCapture(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    DWORD junk, cursor;
+    if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) == DS_OK) {
+        h->lastchunk = cursor / device->buffer_size;
+    }
+}
+
+static void DSOUND_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->mixbuf != NULL) {
+            IDirectSoundBuffer_Stop(device->hidden->mixbuf);
+            IDirectSoundBuffer_Release(device->hidden->mixbuf);
+        }
+        if (device->hidden->sound != NULL) {
+            IDirectSound_Release(device->hidden->sound);
+        }
+        if (device->hidden->capturebuf != NULL) {
+            IDirectSoundCaptureBuffer_Stop(device->hidden->capturebuf);
+            IDirectSoundCaptureBuffer_Release(device->hidden->capturebuf);
+        }
+        if (device->hidden->capture != NULL) {
+            IDirectSoundCapture_Release(device->hidden->capture);
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+/* This function tries to create a secondary audio buffer, and returns the
+   number of audio chunks available in the created buffer. This is for
+   playback devices, not capture.
+*/
+static int CreateSecondary(SDL_AudioDevice *device, const DWORD bufsize, WAVEFORMATEX *wfmt)
+{
+    LPDIRECTSOUND sndObj = device->hidden->sound;
+    LPDIRECTSOUNDBUFFER *sndbuf = &device->hidden->mixbuf;
+    HRESULT result = DS_OK;
+    DSBUFFERDESC format;
+    LPVOID pvAudioPtr1, pvAudioPtr2;
+    DWORD dwAudioBytes1, dwAudioBytes2;
+
+    // Try to create the secondary buffer
+    SDL_zero(format);
+    format.dwSize = sizeof(format);
+    format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
+    format.dwFlags |= DSBCAPS_GLOBALFOCUS;
+    format.dwBufferBytes = bufsize;
+    format.lpwfxFormat = wfmt;
+    result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
+    if (result != DS_OK) {
+        return SetDSerror("DirectSound CreateSoundBuffer", result);
+    }
+    IDirectSoundBuffer_SetFormat(*sndbuf, wfmt);
+
+    // Silence the initial audio buffer
+    result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
+                                     (LPVOID *)&pvAudioPtr1, &dwAudioBytes1,
+                                     (LPVOID *)&pvAudioPtr2, &dwAudioBytes2,
+                                     DSBLOCK_ENTIREBUFFER);
+    if (result == DS_OK) {
+        SDL_memset(pvAudioPtr1, device->silence_value, dwAudioBytes1);
+        IDirectSoundBuffer_Unlock(*sndbuf,
+                                  (LPVOID)pvAudioPtr1, dwAudioBytes1,
+                                  (LPVOID)pvAudioPtr2, dwAudioBytes2);
+    }
+
+    return 0;  // We're ready to go
+}
+
+/* This function tries to create a capture buffer, and returns the
+   number of audio chunks available in the created buffer. This is for
+   capture devices, not playback.
+*/
+static int CreateCaptureBuffer(SDL_AudioDevice *device, const DWORD bufsize, WAVEFORMATEX *wfmt)
+{
+    LPDIRECTSOUNDCAPTURE capture = device->hidden->capture;
+    LPDIRECTSOUNDCAPTUREBUFFER *capturebuf = &device->hidden->capturebuf;
+    DSCBUFFERDESC format;
+    HRESULT result;
+
+    SDL_zero(format);
+    format.dwSize = sizeof(format);
+    format.dwFlags = DSCBCAPS_WAVEMAPPED;
+    format.dwBufferBytes = bufsize;
+    format.lpwfxFormat = wfmt;
+
+    result = IDirectSoundCapture_CreateCaptureBuffer(capture, &format, capturebuf, NULL);
+    if (result != DS_OK) {
+        return SetDSerror("DirectSound CreateCaptureBuffer", result);
+    }
+
+    result = IDirectSoundCaptureBuffer_Start(*capturebuf, DSCBSTART_LOOPING);
+    if (result != DS_OK) {
+        IDirectSoundCaptureBuffer_Release(*capturebuf);
+        return SetDSerror("DirectSound Start", result);
+    }
+
+#if 0
+    // presumably this starts at zero, but just in case...
+    result = IDirectSoundCaptureBuffer_GetCurrentPosition(*capturebuf, &junk, &cursor);
+    if (result != DS_OK) {
+        IDirectSoundCaptureBuffer_Stop(*capturebuf);
+        IDirectSoundCaptureBuffer_Release(*capturebuf);
+        return SetDSerror("DirectSound GetCurrentPosition", result);
+    }
+
+    device->hidden->lastchunk = cursor / device->buffer_size;
+#endif
+
+    return 0;
+}
+
+static int DSOUND_OpenDevice(SDL_AudioDevice *device)
+{
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Open the audio device
+    LPGUID guid;
+#ifdef HAVE_MMDEVICEAPI_H
+    if (SupportsIMMDevice) {
+        guid = SDL_IMMDevice_GetDirectSoundGUID(device);
+    } else
+#endif
+    {
+        guid = (LPGUID) device->handle;
+    }
+
+    SDL_assert(guid != NULL);
+
+    HRESULT result;
+    if (device->iscapture) {
+        result = pDirectSoundCaptureCreate8(guid, &device->hidden->capture, NULL);
+        if (result != DS_OK) {
+            return SetDSerror("DirectSoundCaptureCreate8", result);
+        }
+    } else {
+        result = pDirectSoundCreate8(guid, &device->hidden->sound, NULL);
+        if (result != DS_OK) {
+            return SetDSerror("DirectSoundCreate8", result);
+        }
+        result = IDirectSound_SetCooperativeLevel(device->hidden->sound,
+                                                  GetDesktopWindow(),
+                                                  DSSCL_NORMAL);
+        if (result != DS_OK) {
+            return SetDSerror("DirectSound SetCooperativeLevel", result);
+        }
+    }
+
+    const DWORD numchunks = 8;
+    SDL_bool tried_format = SDL_FALSE;
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+        case SDL_AUDIO_S16:
+        case SDL_AUDIO_S32:
+        case SDL_AUDIO_F32:
+            tried_format = SDL_TRUE;
+
+            device->spec.format = test_format;
+
+            // Update the fragment size as size in bytes
+            SDL_UpdatedAudioDeviceFormat(device);
+
+            const DWORD bufsize = numchunks * device->buffer_size;
+            if ((bufsize < DSBSIZE_MIN) || (bufsize > DSBSIZE_MAX)) {
+                SDL_SetError("Sound buffer size must be between %d and %d",
+                             (int)((DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks),
+                             (int)(DSBSIZE_MAX / numchunks));
+            } else {
+                WAVEFORMATEXTENSIBLE wfmt;
+                SDL_zero(wfmt);
+                if (device->spec.channels > 2) {
+                    wfmt.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
+                    wfmt.Format.cbSize = sizeof(wfmt) - sizeof(WAVEFORMATEX);
+
+                    if (SDL_AUDIO_ISFLOAT(device->spec.format)) {
+                        SDL_memcpy(&wfmt.SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof(GUID));
+                    } else {
+                        SDL_memcpy(&wfmt.SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID));
+                    }
+                    wfmt.Samples.wValidBitsPerSample = SDL_AUDIO_BITSIZE(device->spec.format);
+
+                    switch (device->spec.channels) {
+                    case 3: // 3.0 (or 2.1)
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER;
+                        break;
+                    case 4: // 4.0
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
+                        break;
+                    case 5: // 5.0 (or 4.1)
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
+                        break;
+                    case 6: // 5.1
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
+                        break;
+                    case 7: // 6.1
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_BACK_CENTER;
+                        break;
+                    case 8: // 7.1
+                        wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT;
+                        break;
+                    default:
+                        SDL_assert(0 && "Unsupported channel count!");
+                        break;
+                    }
+                } else if (SDL_AUDIO_ISFLOAT(device->spec.format)) {
+                    wfmt.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
+                } else {
+                    wfmt.Format.wFormatTag = WAVE_FORMAT_PCM;
+                }
+
+                wfmt.Format.wBitsPerSample = SDL_AUDIO_BITSIZE(device->spec.format);
+                wfmt.Format.nChannels = (WORD)device->spec.channels;
+                wfmt.Format.nSamplesPerSec = device->spec.freq;
+                wfmt.Format.nBlockAlign = wfmt.Format.nChannels * (wfmt.Format.wBitsPerSample / 8);
+                wfmt.Format.nAvgBytesPerSec = wfmt.Format.nSamplesPerSec * wfmt.Format.nBlockAlign;
+
+                const int rc = device->iscapture ? CreateCaptureBuffer(device, bufsize, (WAVEFORMATEX *)&wfmt) : CreateSecondary(device, bufsize, (WAVEFORMATEX *)&wfmt);
+                if (rc == 0) {
+                    device->hidden->num_buffers = numchunks;
+                    break;
+                }
+            }
+            continue;
+        default:
+            continue;
+        }
+        break;
+    }
+
+    if (!test_format) {
+        if (tried_format) {
+            return -1; // CreateSecondary() should have called SDL_SetError().
+        }
+        return SDL_SetError("%s: Unsupported audio format", "directsound");
+    }
+
+    // Playback buffers will auto-start playing in DSOUND_WaitDevice()
+
+    return 0; // good to go.
+}
+
+static void DSOUND_DeinitializeStart(void)
+{
+#ifdef HAVE_MMDEVICEAPI_H
+    if (SupportsIMMDevice) {
+        SDL_IMMDevice_Quit();
+    }
+#endif
+}
+
+static void DSOUND_Deinitialize(void)
+{
+    DSOUND_Unload();
+#ifdef HAVE_MMDEVICEAPI_H
+    SupportsIMMDevice = SDL_FALSE;
+#endif
+}
+
+static SDL_bool DSOUND_Init(SDL_AudioDriverImpl *impl)
+{
+    if (!DSOUND_Load()) {
+        return SDL_FALSE;
+    }
+
+#ifdef HAVE_MMDEVICEAPI_H
+    SupportsIMMDevice = !(SDL_IMMDevice_Init(NULL) < 0);
+#endif
+
+    impl->DetectDevices = DSOUND_DetectDevices;
+    impl->OpenDevice = DSOUND_OpenDevice;
+    impl->PlayDevice = DSOUND_PlayDevice;
+    impl->WaitDevice = DSOUND_WaitDevice;
+    impl->GetDeviceBuf = DSOUND_GetDeviceBuf;
+    impl->WaitCaptureDevice = DSOUND_WaitCaptureDevice;
+    impl->CaptureFromDevice = DSOUND_CaptureFromDevice;
+    impl->FlushCapture = DSOUND_FlushCapture;
+    impl->CloseDevice = DSOUND_CloseDevice;
+    impl->FreeDeviceHandle = DSOUND_FreeDeviceHandle;
+    impl->DeinitializeStart = DSOUND_DeinitializeStart;
+    impl->Deinitialize = DSOUND_Deinitialize;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap DSOUND_bootstrap = {
+    "directsound", "DirectSound", DSOUND_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_DSOUND

vendor/sdl-3.0.0/src/audio/directsound/SDL_directsound.h

@@ -0,0 +1,43 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_directsound_h_
+#define SDL_directsound_h_
+
+#include "../../core/windows/SDL_directx.h"
+
+#include "../SDL_sysaudio.h"
+
+// The DirectSound objects
+struct SDL_PrivateAudioData
+{
+    // !!! FIXME: make this a union with capture/playback sections?
+    LPDIRECTSOUND sound;
+    LPDIRECTSOUNDBUFFER mixbuf;
+    LPDIRECTSOUNDCAPTURE capture;
+    LPDIRECTSOUNDCAPTUREBUFFER capturebuf;
+    int num_buffers;
+    DWORD lastchunk;
+    Uint8 *locked_buf;
+};
+
+#endif // SDL_directsound_h_

vendor/sdl-3.0.0/src/audio/disk/SDL_diskaudio.c

@@ -0,0 +1,173 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_DISK
+
+// Output raw audio data to a file.
+
+#include "../SDL_sysaudio.h"
+#include "SDL_diskaudio.h"
+
+// !!! FIXME: these should be SDL hints, not environment variables.
+// environment variables and defaults.
+#define DISKENVR_OUTFILE    "SDL_DISKAUDIOFILE"
+#define DISKDEFAULT_OUTFILE "sdlaudio.raw"
+#define DISKENVR_INFILE     "SDL_DISKAUDIOFILEIN"
+#define DISKDEFAULT_INFILE  "sdlaudio-in.raw"
+#define DISKENVR_IODELAY    "SDL_DISKAUDIODELAY"
+
+static int DISKAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    SDL_Delay(device->hidden->io_delay);
+    return 0;
+}
+
+static int DISKAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    const int written = (int)SDL_RWwrite(device->hidden->io, buffer, (size_t)buffer_size);
+    if (written != buffer_size) { // If we couldn't write, assume fatal error for now
+        return -1;
+    }
+#ifdef DEBUG_AUDIO
+    SDL_Log("DISKAUDIO: Wrote %d bytes of audio data", (int) written);
+#endif
+    return 0;
+}
+
+static Uint8 *DISKAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int DISKAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    const int origbuflen = buflen;
+
+    if (h->io) {
+        const int br = (int)SDL_RWread(h->io, buffer, (size_t)buflen);
+        buflen -= br;
+        buffer = ((Uint8 *)buffer) + br;
+        if (buflen > 0) { // EOF (or error, but whatever).
+            SDL_RWclose(h->io);
+            h->io = NULL;
+        }
+    }
+
+    // if we ran out of file, just write silence.
+    SDL_memset(buffer, device->silence_value, buflen);
+
+    return origbuflen;
+}
+
+static void DISKAUDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    // no op...we don't advance the file pointer or anything.
+}
+
+static void DISKAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->io != NULL) {
+            SDL_RWclose(device->hidden->io);
+        }
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static const char *get_filename(const SDL_bool iscapture)
+{
+    const char *devname = SDL_getenv(iscapture ? DISKENVR_INFILE : DISKENVR_OUTFILE);
+    if (devname == NULL) {
+        devname = iscapture ? DISKDEFAULT_INFILE : DISKDEFAULT_OUTFILE;
+    }
+    return devname;
+}
+
+static int DISKAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    SDL_bool iscapture = device->iscapture;
+    const char *fname = get_filename(iscapture);
+    const char *envr = SDL_getenv(DISKENVR_IODELAY);
+
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    if (envr != NULL) {
+        device->hidden->io_delay = SDL_atoi(envr);
+    } else {
+        device->hidden->io_delay = ((device->sample_frames * 1000) / device->spec.freq);
+    }
+
+    // Open the "audio device"
+    device->hidden->io = SDL_RWFromFile(fname, iscapture ? "rb" : "wb");
+    if (device->hidden->io == NULL) {
+        return -1;
+    }
+
+    // Allocate mixing buffer
+    if (!iscapture) {
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+        if (device->hidden->mixbuf == NULL) {
+            return SDL_OutOfMemory();
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+    SDL_LogCritical(SDL_LOG_CATEGORY_AUDIO, "You are using the SDL disk i/o audio driver!");
+    SDL_LogCritical(SDL_LOG_CATEGORY_AUDIO, " %s file [%s].\n", iscapture ? "Reading from" : "Writing to", fname);
+
+    return 0;  // We're ready to rock and roll. :-)
+}
+
+static void DISKAUDIO_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    *default_output = SDL_AddAudioDevice(SDL_FALSE, DEFAULT_OUTPUT_DEVNAME, NULL, (void *)0x1);
+    *default_capture = SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *)0x2);
+}
+
+static SDL_bool DISKAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = DISKAUDIO_OpenDevice;
+    impl->WaitDevice = DISKAUDIO_WaitDevice;
+    impl->WaitCaptureDevice = DISKAUDIO_WaitDevice;
+    impl->PlayDevice = DISKAUDIO_PlayDevice;
+    impl->GetDeviceBuf = DISKAUDIO_GetDeviceBuf;
+    impl->CaptureFromDevice = DISKAUDIO_CaptureFromDevice;
+    impl->FlushCapture = DISKAUDIO_FlushCapture;
+    impl->CloseDevice = DISKAUDIO_CloseDevice;
+    impl->DetectDevices = DISKAUDIO_DetectDevices;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap DISKAUDIO_bootstrap = {
+    "disk", "direct-to-disk audio", DISKAUDIO_Init, SDL_TRUE
+};
+
+#endif // SDL_AUDIO_DRIVER_DISK

vendor/sdl-3.0.0/src/audio/disk/SDL_diskaudio.h

@@ -0,0 +1,36 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_diskaudio_h_
+#define SDL_diskaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // The file descriptor for the audio device
+    SDL_RWops *io;
+    Uint32 io_delay;
+    Uint8 *mixbuf;
+};
+
+#endif // SDL_diskaudio_h_

vendor/sdl-3.0.0/src/audio/dsp/SDL_dspaudio.c

@@ -0,0 +1,304 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+// !!! FIXME: clean out perror and fprintf calls in here.
+
+#ifdef SDL_AUDIO_DRIVER_OSS
+
+#include <stdio.h>  // For perror()
+#include <string.h> // For strerror()
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include <sys/soundcard.h>
+
+#include "../SDL_audiodev_c.h"
+#include "../../SDL_utils_c.h"
+#include "SDL_dspaudio.h"
+
+static void DSP_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    SDL_EnumUnixAudioDevices(SDL_FALSE, NULL);
+}
+
+static void DSP_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_fd >= 0) {
+            close(device->hidden->audio_fd);
+        }
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+    }
+}
+
+static int DSP_OpenDevice(SDL_AudioDevice *device)
+{
+    // Make sure fragment size stays a power of 2, or OSS fails.
+    // (I don't know which of these are actually legal values, though...)
+    if (device->spec.channels > 8) {
+        device->spec.channels = 8;
+    } else if (device->spec.channels > 4) {
+        device->spec.channels = 4;
+    } else if (device->spec.channels > 2) {
+        device->spec.channels = 2;
+    }
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Open the audio device; we hardcode the device path in `device->name` for lack of better info, so use that.
+    const int flags = ((device->iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
+    device->hidden->audio_fd = open(device->name, flags | O_CLOEXEC, 0);
+    if (device->hidden->audio_fd < 0) {
+        return SDL_SetError("Couldn't open %s: %s", device->name, strerror(errno));
+    }
+
+    // Make the file descriptor use blocking i/o with fcntl()
+    {
+        const long ctlflags = fcntl(device->hidden->audio_fd, F_GETFL) & ~O_NONBLOCK;
+        if (fcntl(device->hidden->audio_fd, F_SETFL, ctlflags) < 0) {
+            return SDL_SetError("Couldn't set audio blocking mode");
+        }
+    }
+
+    // Get a list of supported hardware formats
+    int value;
+    if (ioctl(device->hidden->audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0) {
+        perror("SNDCTL_DSP_GETFMTS");
+        return SDL_SetError("Couldn't get audio format list");
+    }
+
+    // Try for a closest match on audio format
+    int format = 0;
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+#ifdef DEBUG_AUDIO
+        fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
+#endif
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+            if (value & AFMT_U8) {
+                format = AFMT_U8;
+            }
+            break;
+        case SDL_AUDIO_S16LE:
+            if (value & AFMT_S16_LE) {
+                format = AFMT_S16_LE;
+            }
+            break;
+        case SDL_AUDIO_S16BE:
+            if (value & AFMT_S16_BE) {
+                format = AFMT_S16_BE;
+            }
+            break;
+
+        default:
+            continue;
+        }
+        break;
+    }
+    if (format == 0) {
+        return SDL_SetError("Couldn't find any hardware audio formats");
+    }
+    device->spec.format = test_format;
+
+    // Set the audio format
+    value = format;
+    if ((ioctl(device->hidden->audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) ||
+        (value != format)) {
+        perror("SNDCTL_DSP_SETFMT");
+        return SDL_SetError("Couldn't set audio format");
+    }
+
+    // Set the number of channels of output
+    value = device->spec.channels;
+    if (ioctl(device->hidden->audio_fd, SNDCTL_DSP_CHANNELS, &value) < 0) {
+        perror("SNDCTL_DSP_CHANNELS");
+        return SDL_SetError("Cannot set the number of channels");
+    }
+    device->spec.channels = value;
+
+    // Set the DSP frequency
+    value = device->spec.freq;
+    if (ioctl(device->hidden->audio_fd, SNDCTL_DSP_SPEED, &value) < 0) {
+        perror("SNDCTL_DSP_SPEED");
+        return SDL_SetError("Couldn't set audio frequency");
+    }
+    device->spec.freq = value;
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    /* Determine the power of two of the fragment size
+       Since apps don't control this in SDL3, and this driver only accepts 8, 16
+       bit formats and 1, 2, 4, 8 channels, this should always be a power of 2 already. */
+    SDL_assert(SDL_powerof2(device->buffer_size) == device->buffer_size);
+
+    int frag_spec = 0;
+    while ((0x01U << frag_spec) < device->buffer_size) {
+        frag_spec++;
+    }
+    frag_spec |= 0x00020000; // two fragments, for low latency
+
+    // Set the audio buffering parameters
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Requesting %d fragments of size %d\n",
+            (frag_spec >> 16), 1 << (frag_spec & 0xFFFF));
+#endif
+    if (ioctl(device->hidden->audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0) {
+        perror("SNDCTL_DSP_SETFRAGMENT");
+    }
+#ifdef DEBUG_AUDIO
+    {
+        audio_buf_info info;
+        ioctl(device->hidden->audio_fd, SNDCTL_DSP_GETOSPACE, &info);
+        fprintf(stderr, "fragments = %d\n", info.fragments);
+        fprintf(stderr, "fragstotal = %d\n", info.fragstotal);
+        fprintf(stderr, "fragsize = %d\n", info.fragsize);
+        fprintf(stderr, "bytes = %d\n", info.bytes);
+    }
+#endif
+
+    // Allocate mixing buffer
+    if (!device->iscapture) {
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+        if (device->hidden->mixbuf == NULL) {
+            return SDL_OutOfMemory();
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+    return 0;  // We're ready to rock and roll. :-)
+}
+
+static int DSP_WaitDevice(SDL_AudioDevice *device)
+{
+    const unsigned long ioctlreq = device->iscapture ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE;
+    struct SDL_PrivateAudioData *h = device->hidden;
+
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        audio_buf_info info;
+        const int rc = ioctl(h->audio_fd, ioctlreq, &info);
+        if (rc < 0) {
+            if (errno == EAGAIN) {
+                continue;
+            }
+            // Hmm, not much we can do - abort
+            fprintf(stderr, "dsp WaitDevice ioctl failed (unrecoverable): %s\n", strerror(errno));
+            return -1;
+        } else if (info.bytes < device->buffer_size) {
+            SDL_Delay(10);
+        } else {
+            break; // ready to go!
+        }
+    }
+
+    return 0;
+}
+
+static int DSP_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    if (write(h->audio_fd, buffer, buflen) == -1) {
+        perror("Audio write");
+        return -1;
+    }
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Wrote %d bytes of audio data\n", h->mixlen);
+#endif
+    return 0;
+}
+
+static Uint8 *DSP_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int DSP_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    return (int)read(device->hidden->audio_fd, buffer, buflen);
+}
+
+static void DSP_FlushCapture(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    audio_buf_info info;
+    if (ioctl(h->audio_fd, SNDCTL_DSP_GETISPACE, &info) == 0) {
+        while (info.bytes > 0) {
+            char buf[512];
+            const size_t len = SDL_min(sizeof(buf), info.bytes);
+            const ssize_t br = read(h->audio_fd, buf, len);
+            if (br <= 0) {
+                break;
+            }
+            info.bytes -= br;
+        }
+    }
+}
+
+static SDL_bool InitTimeDevicesExist = SDL_FALSE;
+static SDL_bool look_for_devices_test(int fd)
+{
+    InitTimeDevicesExist = SDL_TRUE; // note that _something_ exists.
+    // Don't add to the device list, we're just seeing if any devices exist.
+    return SDL_FALSE;
+}
+
+static SDL_bool DSP_Init(SDL_AudioDriverImpl *impl)
+{
+    InitTimeDevicesExist = SDL_FALSE;
+    SDL_EnumUnixAudioDevices(SDL_FALSE, look_for_devices_test);
+    if (!InitTimeDevicesExist) {
+        SDL_SetError("dsp: No such audio device");
+        return SDL_FALSE; // maybe try a different backend.
+    }
+
+    impl->DetectDevices = DSP_DetectDevices;
+    impl->OpenDevice = DSP_OpenDevice;
+    impl->WaitDevice = DSP_WaitDevice;
+    impl->PlayDevice = DSP_PlayDevice;
+    impl->GetDeviceBuf = DSP_GetDeviceBuf;
+    impl->CloseDevice = DSP_CloseDevice;
+    impl->WaitCaptureDevice = DSP_WaitDevice;
+    impl->CaptureFromDevice = DSP_CaptureFromDevice;
+    impl->FlushCapture = DSP_FlushCapture;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap DSP_bootstrap = {
+    "dsp", "Open Sound System (/dev/dsp)", DSP_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_OSS

vendor/sdl-3.0.0/src/audio/dsp/SDL_dspaudio.h

@@ -0,0 +1,37 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_dspaudio_h_
+#define SDL_dspaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // The file descriptor for the audio device
+    int audio_fd;
+
+    // Raw mixing buffer
+    Uint8 *mixbuf;
+};
+
+#endif // SDL_dspaudio_h_

vendor/sdl-3.0.0/src/audio/dummy/SDL_dummyaudio.c

@@ -0,0 +1,97 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+// Output audio to nowhere...
+
+#include "../SDL_sysaudio.h"
+#include "SDL_dummyaudio.h"
+
+// !!! FIXME: this should be an SDL hint, not an environment variable.
+#define DUMMYENVR_IODELAY "SDL_DUMMYAUDIODELAY"
+
+static int DUMMYAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    SDL_Delay(device->hidden->io_delay);
+    return 0;
+}
+
+static int DUMMYAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    const char *envr = SDL_getenv(DUMMYENVR_IODELAY);
+
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (!device->hidden) {
+        return SDL_OutOfMemory();
+    }
+
+    if (!device->iscapture) {
+        device->hidden->mixbuf = (Uint8 *) SDL_malloc(device->buffer_size);
+        if (!device->hidden->mixbuf) {
+            return SDL_OutOfMemory();
+        }
+    }
+
+    device->hidden->io_delay = (Uint32) (envr ? SDL_atoi(envr) : ((device->sample_frames * 1000) / device->spec.freq));
+
+    return 0; // we're good; don't change reported device format.
+}
+
+static void DUMMYAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static Uint8 *DUMMYAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int DUMMYAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    // always return a full buffer of silence.
+    SDL_memset(buffer, device->silence_value, buflen);
+    return buflen;
+}
+
+static SDL_bool DUMMYAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = DUMMYAUDIO_OpenDevice;
+    impl->CloseDevice = DUMMYAUDIO_CloseDevice;
+    impl->WaitDevice = DUMMYAUDIO_WaitDevice;
+    impl->GetDeviceBuf = DUMMYAUDIO_GetDeviceBuf;
+    impl->WaitCaptureDevice = DUMMYAUDIO_WaitDevice;
+    impl->CaptureFromDevice = DUMMYAUDIO_CaptureFromDevice;
+
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap DUMMYAUDIO_bootstrap = {
+    "dummy", "SDL dummy audio driver", DUMMYAUDIO_Init, SDL_TRUE
+};

vendor/sdl-3.0.0/src/audio/dummy/SDL_dummyaudio.h

@@ -0,0 +1,34 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_dummyaudio_h_
+#define SDL_dummyaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    Uint8 *mixbuf;   // The file descriptor for the audio device
+    Uint32 io_delay; // miliseconds to sleep in WaitDevice.
+};
+
+#endif // SDL_dummyaudio_h_

vendor/sdl-3.0.0/src/audio/emscripten/SDL_emscriptenaudio.c

@@ -0,0 +1,351 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_EMSCRIPTEN
+
+#include "../SDL_sysaudio.h"
+#include "SDL_emscriptenaudio.h"
+
+#include <emscripten/emscripten.h>
+
+// just turn off clang-format for this whole file, this INDENT_OFF stuff on
+//  each EM_ASM section is ugly.
+/* *INDENT-OFF* */ /* clang-format off */
+
+static Uint8 *EMSCRIPTENAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int EMSCRIPTENAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    const int framelen = SDL_AUDIO_FRAMESIZE(device->spec);
+    MAIN_THREAD_EM_ASM({
+        var SDL3 = Module['SDL3'];
+        var numChannels = SDL3.audio.currentOutputBuffer['numberOfChannels'];
+        for (var c = 0; c < numChannels; ++c) {
+            var channelData = SDL3.audio.currentOutputBuffer['getChannelData'](c);
+            if (channelData.length != $1) {
+                throw 'Web Audio output buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
+            }
+
+            for (var j = 0; j < $1; ++j) {
+                channelData[j] = HEAPF32[$0 + ((j*numChannels + c) << 2) >> 2];  // !!! FIXME: why are these shifts here?
+            }
+        }
+    }, buffer, buffer_size / framelen);
+    return 0;
+}
+
+
+static void EMSCRIPTENAUDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    // Do nothing, the new data will just be dropped.
+}
+
+static int EMSCRIPTENAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    MAIN_THREAD_EM_ASM({
+        var SDL3 = Module['SDL3'];
+        var numChannels = SDL3.capture.currentCaptureBuffer.numberOfChannels;
+        for (var c = 0; c < numChannels; ++c) {
+            var channelData = SDL3.capture.currentCaptureBuffer.getChannelData(c);
+            if (channelData.length != $1) {
+                throw 'Web Audio capture buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
+            }
+
+            if (numChannels == 1) {  // fastpath this a little for the common (mono) case.
+                for (var j = 0; j < $1; ++j) {
+                    setValue($0 + (j * 4), channelData[j], 'float');
+                }
+            } else {
+                for (var j = 0; j < $1; ++j) {
+                    setValue($0 + (((j * numChannels) + c) * 4), channelData[j], 'float');
+                }
+            }
+        }
+    }, buffer, (buflen / sizeof(float)) / device->spec.channels);
+
+    return buflen;
+}
+
+static void EMSCRIPTENAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (!device->hidden) {
+        return;
+    }
+
+    MAIN_THREAD_EM_ASM({
+        var SDL3 = Module['SDL3'];
+        if ($0) {
+            if (SDL3.capture.silenceTimer !== undefined) {
+                clearInterval(SDL3.capture.silenceTimer);
+            }
+            if (SDL3.capture.stream !== undefined) {
+                var tracks = SDL3.capture.stream.getAudioTracks();
+                for (var i = 0; i < tracks.length; i++) {
+                    SDL3.capture.stream.removeTrack(tracks[i]);
+                }
+            }
+            if (SDL3.capture.scriptProcessorNode !== undefined) {
+                SDL3.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) {};
+                SDL3.capture.scriptProcessorNode.disconnect();
+            }
+            if (SDL3.capture.mediaStreamNode !== undefined) {
+                SDL3.capture.mediaStreamNode.disconnect();
+            }
+            SDL3.capture = undefined;
+        } else {
+            if (SDL3.audio.scriptProcessorNode != undefined) {
+                SDL3.audio.scriptProcessorNode.disconnect();
+            }
+            if (SDL3.audio.silenceTimer !== undefined) {
+                clearInterval(SDL3.audio.silenceTimer);
+            }
+            SDL3.audio = undefined;
+        }
+        if ((SDL3.audioContext !== undefined) && (SDL3.audio === undefined) && (SDL3.capture === undefined)) {
+            SDL3.audioContext.close();
+            SDL3.audioContext = undefined;
+        }
+    }, device->iscapture);
+
+    SDL_free(device->hidden->mixbuf);
+    SDL_free(device->hidden);
+    device->hidden = NULL;
+
+    SDL_AudioThreadFinalize(device);
+}
+
+EM_JS_DEPS(sdlaudio, "$autoResumeAudioContext,$dynCall");
+
+static int EMSCRIPTENAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    // based on parts of library_sdl.js
+
+    // create context
+    const int result = MAIN_THREAD_EM_ASM_INT({
+        if (typeof(Module['SDL3']) === 'undefined') {
+            Module['SDL3'] = {};
+        }
+        var SDL3 = Module['SDL3'];
+        if (!$0) {
+            SDL3.audio = {};
+        } else {
+            SDL3.capture = {};
+        }
+
+        if (!SDL3.audioContext) {
+            if (typeof(AudioContext) !== 'undefined') {
+                SDL3.audioContext = new AudioContext();
+            } else if (typeof(webkitAudioContext) !== 'undefined') {
+                SDL3.audioContext = new webkitAudioContext();
+            }
+            if (SDL3.audioContext) {
+                if ((typeof navigator.userActivation) === 'undefined') {  // Firefox doesn't have this (as of August 2023), use autoResumeAudioContext instead.
+                    autoResumeAudioContext(SDL3.audioContext);
+                }
+            }
+        }
+        return SDL3.audioContext === undefined ? -1 : 0;
+    }, device->iscapture);
+
+    if (result < 0) {
+        return SDL_SetError("Web Audio API is not available!");
+    }
+
+    device->spec.format = SDL_AUDIO_F32;  // web audio only supports floats
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // limit to native freq
+    device->spec.freq = EM_ASM_INT({ return Module['SDL3'].audioContext.sampleRate; });
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    if (!device->iscapture) {
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+        if (device->hidden->mixbuf == NULL) {
+            return SDL_OutOfMemory();
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+    if (device->iscapture) {
+        /* The idea is to take the capture media stream, hook it up to an
+           audio graph where we can pass it through a ScriptProcessorNode
+           to access the raw PCM samples and push them to the SDL app's
+           callback. From there, we "process" the audio data into silence
+           and forget about it.
+
+           This should, strictly speaking, use MediaRecorder for capture, but
+           this API is cleaner to use and better supported, and fires a
+           callback whenever there's enough data to fire down into the app.
+           The downside is that we are spending CPU time silencing a buffer
+           that the audiocontext uselessly mixes into any output. On the
+           upside, both of those things are not only run in native code in
+           the browser, they're probably SIMD code, too. MediaRecorder
+           feels like it's a pretty inefficient tapdance in similar ways,
+           to be honest. */
+
+        MAIN_THREAD_EM_ASM({
+            var SDL3 = Module['SDL3'];
+            var have_microphone = function(stream) {
+                //console.log('SDL audio capture: we have a microphone! Replacing silence callback.');
+                if (SDL3.capture.silenceTimer !== undefined) {
+                    clearInterval(SDL3.capture.silenceTimer);
+                    SDL3.capture.silenceTimer = undefined;
+                    SDL3.capture.silenceBuffer = undefined
+                }
+                SDL3.capture.mediaStreamNode = SDL3.audioContext.createMediaStreamSource(stream);
+                SDL3.capture.scriptProcessorNode = SDL3.audioContext.createScriptProcessor($1, $0, 1);
+                SDL3.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) {
+                    if ((SDL3 === undefined) || (SDL3.capture === undefined)) { return; }
+                    audioProcessingEvent.outputBuffer.getChannelData(0).fill(0.0);
+                    SDL3.capture.currentCaptureBuffer = audioProcessingEvent.inputBuffer;
+                    dynCall('vi', $2, [$3]);
+                };
+                SDL3.capture.mediaStreamNode.connect(SDL3.capture.scriptProcessorNode);
+                SDL3.capture.scriptProcessorNode.connect(SDL3.audioContext.destination);
+                SDL3.capture.stream = stream;
+            };
+
+            var no_microphone = function(error) {
+                //console.log('SDL audio capture: we DO NOT have a microphone! (' + error.name + ')...leaving silence callback running.');
+            };
+
+            // we write silence to the audio callback until the microphone is available (user approves use, etc).
+            SDL3.capture.silenceBuffer = SDL3.audioContext.createBuffer($0, $1, SDL3.audioContext.sampleRate);
+            SDL3.capture.silenceBuffer.getChannelData(0).fill(0.0);
+            var silence_callback = function() {
+                SDL3.capture.currentCaptureBuffer = SDL3.capture.silenceBuffer;
+                dynCall('vi', $2, [$3]);
+            };
+
+            SDL3.capture.silenceTimer = setInterval(silence_callback, ($1 / SDL3.audioContext.sampleRate) * 1000);
+
+            if ((navigator.mediaDevices !== undefined) && (navigator.mediaDevices.getUserMedia !== undefined)) {
+                navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then(have_microphone).catch(no_microphone);
+            } else if (navigator.webkitGetUserMedia !== undefined) {
+                navigator.webkitGetUserMedia({ audio: true, video: false }, have_microphone, no_microphone);
+            }
+        }, device->spec.channels, device->sample_frames, SDL_CaptureAudioThreadIterate, device);
+    } else {
+        // setup a ScriptProcessorNode
+        MAIN_THREAD_EM_ASM({
+            var SDL3 = Module['SDL3'];
+            SDL3.audio.scriptProcessorNode = SDL3.audioContext['createScriptProcessor']($1, 0, $0);
+            SDL3.audio.scriptProcessorNode['onaudioprocess'] = function (e) {
+                if ((SDL3 === undefined) || (SDL3.audio === undefined)) { return; }
+                // if we're actually running the node, we don't need the fake callback anymore, so kill it.
+                if (SDL3.audio.silenceTimer !== undefined) {
+                    clearInterval(SDL3.audio.silenceTimer);
+                    SDL3.audio.silenceTimer = undefined;
+                    SDL3.audio.silenceBuffer = undefined;
+                }
+                SDL3.audio.currentOutputBuffer = e['outputBuffer'];
+                dynCall('vi', $2, [$3]);
+            };
+
+            SDL3.audio.scriptProcessorNode['connect'](SDL3.audioContext['destination']);
+
+            if (SDL3.audioContext.state === 'suspended') {  // uhoh, autoplay is blocked.
+                SDL3.audio.silenceBuffer = SDL3.audioContext.createBuffer($0, $1, SDL3.audioContext.sampleRate);
+                SDL3.audio.silenceBuffer.getChannelData(0).fill(0.0);
+                var silence_callback = function() {
+                    if ((typeof navigator.userActivation) !== 'undefined') {  // Almost everything modern except Firefox (as of August 2023)
+                        if (navigator.userActivation.hasBeenActive) {
+                            SDL3.audioContext.resume();
+                        }
+                    }
+
+                    // the buffer that gets filled here just gets ignored, so the app can make progress
+                    //  and/or avoid flooding audio queues until we can actually play audio.
+                    SDL3.audio.currentOutputBuffer = SDL3.audio.silenceBuffer;
+                    dynCall('vi', $2, [$3]);
+                    SDL3.audio.currentOutputBuffer = undefined;
+                };
+
+                SDL3.audio.silenceTimer = setInterval(silence_callback, ($1 / SDL3.audioContext.sampleRate) * 1000);
+            }
+        }, device->spec.channels, device->sample_frames, SDL_OutputAudioThreadIterate, device);
+    }
+
+    return 0;
+}
+
+static SDL_bool EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    SDL_bool available, capture_available;
+
+    impl->OpenDevice = EMSCRIPTENAUDIO_OpenDevice;
+    impl->CloseDevice = EMSCRIPTENAUDIO_CloseDevice;
+    impl->GetDeviceBuf = EMSCRIPTENAUDIO_GetDeviceBuf;
+    impl->PlayDevice = EMSCRIPTENAUDIO_PlayDevice;
+    impl->FlushCapture = EMSCRIPTENAUDIO_FlushCapture;
+    impl->CaptureFromDevice = EMSCRIPTENAUDIO_CaptureFromDevice;
+
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+
+    // technically, this is just runs in idle time in the main thread, but it's close enough to a "thread" for our purposes.
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
+
+    // check availability
+    available = MAIN_THREAD_EM_ASM_INT({
+        if (typeof(AudioContext) !== 'undefined') {
+            return true;
+        } else if (typeof(webkitAudioContext) !== 'undefined') {
+            return true;
+        }
+        return false;
+    }) ? SDL_TRUE : SDL_FALSE;
+
+    if (!available) {
+        SDL_SetError("No audio context available");
+    }
+
+    capture_available = available && MAIN_THREAD_EM_ASM_INT({
+        if ((typeof(navigator.mediaDevices) !== 'undefined') && (typeof(navigator.mediaDevices.getUserMedia) !== 'undefined')) {
+            return true;
+        } else if (typeof(navigator.webkitGetUserMedia) !== 'undefined') {
+            return true;
+        }
+        return false;
+    }) ? SDL_TRUE : SDL_FALSE;
+
+    impl->HasCaptureSupport = capture_available ? SDL_TRUE : SDL_FALSE;
+    impl->OnlyHasDefaultCaptureDevice = capture_available ? SDL_TRUE : SDL_FALSE;
+
+    return available;
+}
+
+AudioBootStrap EMSCRIPTENAUDIO_bootstrap = {
+    "emscripten", "SDL emscripten audio driver", EMSCRIPTENAUDIO_Init, SDL_FALSE
+};
+
+/* *INDENT-ON* */ /* clang-format on */
+
+#endif // SDL_AUDIO_DRIVER_EMSCRIPTEN

vendor/sdl-3.0.0/src/audio/emscripten/SDL_emscriptenaudio.h

@@ -0,0 +1,33 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_emscriptenaudio_h_
+#define SDL_emscriptenaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    Uint8 *mixbuf;
+};
+
+#endif // SDL_emscriptenaudio_h_

vendor/sdl-3.0.0/src/audio/haiku/SDL_haikuaudio.cc

@@ -0,0 +1,222 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_HAIKU
+
+// Allow access to the audio stream on Haiku
+
+#include <SoundPlayer.h>
+#include <signal.h>
+
+#include "../../core/haiku/SDL_BeApp.h"
+
+extern "C"
+{
+
+#include "../SDL_sysaudio.h"
+#include "SDL_haikuaudio.h"
+
+}
+
+static Uint8 *HAIKUAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    SDL_assert(device->hidden->current_buffer != NULL);
+    SDL_assert(device->hidden->current_buffer_len > 0);
+    *buffer_size = device->hidden->current_buffer_len;
+    return device->hidden->current_buffer;
+}
+
+static int HAIKUAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    // We already wrote our output right into the BSoundPlayer's callback's stream. Just clean up our stuff.
+    SDL_assert(device->hidden->current_buffer != NULL);
+    SDL_assert(device->hidden->current_buffer_len > 0);
+    device->hidden->current_buffer = NULL;
+    device->hidden->current_buffer_len = 0;
+    return 0;
+}
+
+// The Haiku callback for handling the audio buffer
+static void FillSound(void *data, void *stream, size_t len, const media_raw_audio_format & format)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)data;
+    SDL_assert(device->hidden->current_buffer == NULL);
+    SDL_assert(device->hidden->current_buffer_len == 0);
+    device->hidden->current_buffer = (Uint8 *) stream;
+    device->hidden->current_buffer_len = (int) len;
+    SDL_OutputAudioThreadIterate(device);
+}
+
+static void HAIKUAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_obj) {
+            device->hidden->audio_obj->Stop();
+            delete device->hidden->audio_obj;
+        }
+        delete device->hidden;
+        device->hidden = NULL;
+        SDL_AudioThreadFinalize(device);
+    }
+}
+
+
+static const int sig_list[] = {
+    SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGWINCH, 0
+};
+
+static inline void MaskSignals(sigset_t * omask)
+{
+    sigset_t mask;
+    int i;
+
+    sigemptyset(&mask);
+    for (i = 0; sig_list[i]; ++i) {
+        sigaddset(&mask, sig_list[i]);
+    }
+    sigprocmask(SIG_BLOCK, &mask, omask);
+}
+
+static inline void UnmaskSignals(sigset_t * omask)
+{
+    sigprocmask(SIG_SETMASK, omask, NULL);
+}
+
+
+static int HAIKUAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    // Initialize all variables that we clean on shutdown
+    device->hidden = new SDL_PrivateAudioData;
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_zerop(device->hidden);
+
+    // Parse the audio format and fill the Be raw audio format
+    media_raw_audio_format format;
+    SDL_zero(format);
+    format.byte_order = B_MEDIA_LITTLE_ENDIAN;
+    format.frame_rate = (float) device->spec.freq;
+    format.channel_count = device->spec.channels;        // !!! FIXME: support > 2?
+
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        switch (test_format) {
+        case SDL_AUDIO_S8:
+            format.format = media_raw_audio_format::B_AUDIO_CHAR;
+            break;
+
+        case SDL_AUDIO_U8:
+            format.format = media_raw_audio_format::B_AUDIO_UCHAR;
+            break;
+
+        case SDL_AUDIO_S16LE:
+            format.format = media_raw_audio_format::B_AUDIO_SHORT;
+            break;
+
+        case SDL_AUDIO_S16BE:
+            format.format = media_raw_audio_format::B_AUDIO_SHORT;
+            format.byte_order = B_MEDIA_BIG_ENDIAN;
+            break;
+
+        case SDL_AUDIO_S32LE:
+            format.format = media_raw_audio_format::B_AUDIO_INT;
+            break;
+
+        case SDL_AUDIO_S32BE:
+            format.format = media_raw_audio_format::B_AUDIO_INT;
+            format.byte_order = B_MEDIA_BIG_ENDIAN;
+            break;
+
+        case SDL_AUDIO_F32LE:
+            format.format = media_raw_audio_format::B_AUDIO_FLOAT;
+            break;
+
+        case SDL_AUDIO_F32BE:
+            format.format = media_raw_audio_format::B_AUDIO_FLOAT;
+            format.byte_order = B_MEDIA_BIG_ENDIAN;
+            break;
+
+        default:
+            continue;
+        }
+        break;
+    }
+
+    if (!test_format) {      // shouldn't happen, but just in case...
+        return SDL_SetError("HAIKU: Unsupported audio format");
+    }
+    device->spec.format = test_format;
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    format.buffer_size = device->buffer_size;
+
+    // Subscribe to the audio stream (creates a new thread)
+    sigset_t omask;
+    MaskSignals(&omask);
+    device->hidden->audio_obj = new BSoundPlayer(&format, "SDL Audio",
+                                                FillSound, NULL, device);
+    UnmaskSignals(&omask);
+
+    if (device->hidden->audio_obj->Start() == B_NO_ERROR) {
+        device->hidden->audio_obj->SetHasData(true);
+    } else {
+        return SDL_SetError("Unable to start Haiku audio");
+    }
+
+    return 0;  // We're running!
+}
+
+static void HAIKUAUDIO_Deinitialize(void)
+{
+    SDL_QuitBeApp();
+}
+
+static SDL_bool HAIKUAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    if (SDL_InitBeApp() < 0) {
+        return SDL_FALSE;
+    }
+
+    // Set the function pointers
+    impl->OpenDevice = HAIKUAUDIO_OpenDevice;
+    impl->GetDeviceBuf = HAIKUAUDIO_GetDeviceBuf;
+    impl->PlayDevice = HAIKUAUDIO_PlayDevice;
+    impl->CloseDevice = HAIKUAUDIO_CloseDevice;
+    impl->Deinitialize = HAIKUAUDIO_Deinitialize;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+
+extern "C" { extern AudioBootStrap HAIKUAUDIO_bootstrap; }
+
+AudioBootStrap HAIKUAUDIO_bootstrap = {
+    "haiku", "Haiku BSoundPlayer", HAIKUAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_HAIKU

vendor/sdl-3.0.0/src/audio/haiku/SDL_haikuaudio.h

@@ -0,0 +1,35 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_haikuaudio_h_
+#define SDL_haikuaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    BSoundPlayer *audio_obj;
+    Uint8 *current_buffer;
+    int current_buffer_len;
+};
+
+#endif // SDL_haikuaudio_h_

vendor/sdl-3.0.0/src/audio/jack/SDL_jackaudio.c

@@ -0,0 +1,443 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_JACK
+
+#include "../SDL_sysaudio.h"
+#include "SDL_jackaudio.h"
+#include "../../thread/SDL_systhread.h"
+
+static jack_client_t *(*JACK_jack_client_open)(const char *, jack_options_t, jack_status_t *, ...);
+static int (*JACK_jack_client_close)(jack_client_t *);
+static void (*JACK_jack_on_shutdown)(jack_client_t *, JackShutdownCallback, void *);
+static int (*JACK_jack_activate)(jack_client_t *);
+static int (*JACK_jack_deactivate)(jack_client_t *);
+static void *(*JACK_jack_port_get_buffer)(jack_port_t *, jack_nframes_t);
+static int (*JACK_jack_port_unregister)(jack_client_t *, jack_port_t *);
+static void (*JACK_jack_free)(void *);
+static const char **(*JACK_jack_get_ports)(jack_client_t *, const char *, const char *, unsigned long);
+static jack_nframes_t (*JACK_jack_get_sample_rate)(jack_client_t *);
+static jack_nframes_t (*JACK_jack_get_buffer_size)(jack_client_t *);
+static jack_port_t *(*JACK_jack_port_register)(jack_client_t *, const char *, const char *, unsigned long, unsigned long);
+static jack_port_t *(*JACK_jack_port_by_name)(jack_client_t *, const char *);
+static const char *(*JACK_jack_port_name)(const jack_port_t *);
+static const char *(*JACK_jack_port_type)(const jack_port_t *);
+static int (*JACK_jack_connect)(jack_client_t *, const char *, const char *);
+static int (*JACK_jack_set_process_callback)(jack_client_t *, JackProcessCallback, void *);
+static int (*JACK_jack_set_sample_rate_callback)(jack_client_t *, JackSampleRateCallback, void *);
+static int (*JACK_jack_set_buffer_size_callback)(jack_client_t *, JackBufferSizeCallback, void *);
+
+static int load_jack_syms(void);
+
+#ifdef SDL_AUDIO_DRIVER_JACK_DYNAMIC
+
+static const char *jack_library = SDL_AUDIO_DRIVER_JACK_DYNAMIC;
+static void *jack_handle = NULL;
+
+// !!! FIXME: this is copy/pasted in several places now
+static int load_jack_sym(const char *fn, void **addr)
+{
+    *addr = SDL_LoadFunction(jack_handle, fn);
+    if (*addr == NULL) {
+        // Don't call SDL_SetError(): SDL_LoadFunction already did.
+        return 0;
+    }
+
+    return 1;
+}
+
+// cast funcs to char* first, to please GCC's strict aliasing rules.
+#define SDL_JACK_SYM(x)                                 \
+    if (!load_jack_sym(#x, (void **)(char *)&JACK_##x)) \
+    return -1
+
+static void UnloadJackLibrary(void)
+{
+    if (jack_handle != NULL) {
+        SDL_UnloadObject(jack_handle);
+        jack_handle = NULL;
+    }
+}
+
+static int LoadJackLibrary(void)
+{
+    int retval = 0;
+    if (jack_handle == NULL) {
+        jack_handle = SDL_LoadObject(jack_library);
+        if (jack_handle == NULL) {
+            retval = -1;
+            // Don't call SDL_SetError(): SDL_LoadObject already did.
+        } else {
+            retval = load_jack_syms();
+            if (retval < 0) {
+                UnloadJackLibrary();
+            }
+        }
+    }
+    return retval;
+}
+
+#else
+
+#define SDL_JACK_SYM(x) JACK_##x = x
+
+static void UnloadJackLibrary(void)
+{
+}
+
+static int LoadJackLibrary(void)
+{
+    load_jack_syms();
+    return 0;
+}
+
+#endif // SDL_AUDIO_DRIVER_JACK_DYNAMIC
+
+static int load_jack_syms(void)
+{
+    SDL_JACK_SYM(jack_client_open);
+    SDL_JACK_SYM(jack_client_close);
+    SDL_JACK_SYM(jack_on_shutdown);
+    SDL_JACK_SYM(jack_activate);
+    SDL_JACK_SYM(jack_deactivate);
+    SDL_JACK_SYM(jack_port_get_buffer);
+    SDL_JACK_SYM(jack_port_unregister);
+    SDL_JACK_SYM(jack_free);
+    SDL_JACK_SYM(jack_get_ports);
+    SDL_JACK_SYM(jack_get_sample_rate);
+    SDL_JACK_SYM(jack_get_buffer_size);
+    SDL_JACK_SYM(jack_port_register);
+    SDL_JACK_SYM(jack_port_by_name);
+    SDL_JACK_SYM(jack_port_name);
+    SDL_JACK_SYM(jack_port_type);
+    SDL_JACK_SYM(jack_connect);
+    SDL_JACK_SYM(jack_set_process_callback);
+    SDL_JACK_SYM(jack_set_sample_rate_callback);
+    SDL_JACK_SYM(jack_set_buffer_size_callback);
+
+    return 0;
+}
+
+static void jackShutdownCallback(void *arg) // JACK went away; device is lost.
+{
+    SDL_AudioDeviceDisconnected((SDL_AudioDevice *)arg);
+}
+
+static int jackSampleRateCallback(jack_nframes_t nframes, void *arg)
+{
+    //SDL_Log("JACK Sample Rate Callback! %d", (int) nframes);
+    SDL_AudioDevice *device = (SDL_AudioDevice *) arg;
+    SDL_AudioSpec newspec;
+    SDL_copyp(&newspec, &device->spec);
+    newspec.freq = (int) nframes;
+    if (SDL_AudioDeviceFormatChanged(device, &newspec, device->sample_frames) < 0) {
+        SDL_AudioDeviceDisconnected(device);
+    }
+    return 0;
+}
+
+static int jackBufferSizeCallback(jack_nframes_t nframes, void *arg)
+{
+    //SDL_Log("JACK Buffer Size Callback! %d", (int) nframes);
+    SDL_AudioDevice *device = (SDL_AudioDevice *) arg;
+    SDL_AudioSpec newspec;
+    SDL_copyp(&newspec, &device->spec);
+    if (SDL_AudioDeviceFormatChanged(device, &newspec, (int) nframes) < 0) {
+        SDL_AudioDeviceDisconnected(device);
+    }
+    return 0;
+}
+
+static int jackProcessPlaybackCallback(jack_nframes_t nframes, void *arg)
+{
+    SDL_assert(nframes == ((SDL_AudioDevice *)arg)->sample_frames);
+    SDL_OutputAudioThreadIterate((SDL_AudioDevice *)arg);
+    return 0;
+}
+
+static int JACK_PlayDevice(SDL_AudioDevice *device, const Uint8 *ui8buffer, int buflen)
+{
+    const float *buffer = (float *) ui8buffer;
+    jack_port_t **ports = device->hidden->sdlports;
+    const int total_channels = device->spec.channels;
+    const int total_frames = device->sample_frames;
+    const jack_nframes_t nframes = (jack_nframes_t) device->sample_frames;
+
+    for (int channelsi = 0; channelsi < total_channels; channelsi++) {
+        float *dst = (float *)JACK_jack_port_get_buffer(ports[channelsi], nframes);
+        if (dst) {
+            const float *src = buffer + channelsi;
+            for (int framesi = 0; framesi < total_frames; framesi++) {
+                *(dst++) = *src;
+                src += total_channels;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static Uint8 *JACK_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return (Uint8 *)device->hidden->iobuffer;
+}
+
+static int jackProcessCaptureCallback(jack_nframes_t nframes, void *arg)
+{
+    SDL_assert(nframes == ((SDL_AudioDevice *)arg)->sample_frames);
+    SDL_CaptureAudioThreadIterate((SDL_AudioDevice *)arg);
+    return 0;
+}
+
+static int JACK_CaptureFromDevice(SDL_AudioDevice *device, void *vbuffer, int buflen)
+{
+    float *buffer = (float *) vbuffer;
+    jack_port_t **ports = device->hidden->sdlports;
+    const int total_channels = device->spec.channels;
+    const int total_frames = device->sample_frames;
+    const jack_nframes_t nframes = (jack_nframes_t) device->sample_frames;
+
+    for (int channelsi = 0; channelsi < total_channels; channelsi++) {
+        const float *src = (const float *)JACK_jack_port_get_buffer(ports[channelsi], nframes);
+        if (src) {
+            float *dst = buffer + channelsi;
+            for (int framesi = 0; framesi < total_frames; framesi++) {
+                *dst = *(src++);
+                dst += total_channels;
+            }
+        }
+    }
+
+    return buflen;
+}
+
+static void JACK_FlushCapture(SDL_AudioDevice *device)
+{
+    // do nothing, the data will just be replaced next callback.
+}
+
+static void JACK_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->client) {
+            JACK_jack_deactivate(device->hidden->client);
+
+            if (device->hidden->sdlports) {
+                const int channels = device->spec.channels;
+                int i;
+                for (i = 0; i < channels; i++) {
+                    JACK_jack_port_unregister(device->hidden->client, device->hidden->sdlports[i]);
+                }
+                SDL_free(device->hidden->sdlports);
+            }
+
+            JACK_jack_client_close(device->hidden->client);
+        }
+
+        SDL_free(device->hidden->iobuffer);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+
+        SDL_AudioThreadFinalize(device);
+    }
+}
+
+// !!! FIXME: unify this (PulseAudio has a getAppName, Pipewire has a thing, etc
+static const char *GetJackAppName(void)
+{
+    const char *retval = SDL_GetHint(SDL_HINT_AUDIO_DEVICE_APP_NAME);
+    if (retval && *retval) {
+        return retval;
+    }
+    retval = SDL_GetHint(SDL_HINT_APP_NAME);
+    if (retval && *retval) {
+        return retval;
+    }
+    return "SDL Application";
+}
+
+static int JACK_OpenDevice(SDL_AudioDevice *device)
+{
+    /* Note that JACK uses "output" for capture devices (they output audio
+        data to us) and "input" for playback (we input audio data to them).
+        Likewise, SDL's playback port will be "output" (we write data out)
+        and capture will be "input" (we read data in). */
+    SDL_bool iscapture = device->iscapture;
+    const unsigned long sysportflags = iscapture ? JackPortIsOutput : JackPortIsInput;
+    const unsigned long sdlportflags = iscapture ? JackPortIsInput : JackPortIsOutput;
+    const JackProcessCallback callback = iscapture ? jackProcessCaptureCallback : jackProcessPlaybackCallback;
+    const char *sdlportstr = iscapture ? "input" : "output";
+    const char **devports = NULL;
+    int *audio_ports;
+    jack_client_t *client = NULL;
+    jack_status_t status;
+    int channels = 0;
+    int ports = 0;
+    int i;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    client = JACK_jack_client_open(GetJackAppName(), JackNoStartServer, &status, NULL);
+    device->hidden->client = client;
+    if (client == NULL) {
+        return SDL_SetError("Can't open JACK client");
+    }
+
+    devports = JACK_jack_get_ports(client, NULL, NULL, JackPortIsPhysical | sysportflags);
+    if (devports == NULL || !devports[0]) {
+        return SDL_SetError("No physical JACK ports available");
+    }
+
+    while (devports[++ports]) {
+        // spin to count devports
+    }
+
+    // Filter out non-audio ports
+    audio_ports = SDL_calloc(ports, sizeof(*audio_ports));
+    for (i = 0; i < ports; i++) {
+        const jack_port_t *dport = JACK_jack_port_by_name(client, devports[i]);
+        const char *type = JACK_jack_port_type(dport);
+        const int len = SDL_strlen(type);
+        // See if type ends with "audio"
+        if (len >= 5 && !SDL_memcmp(type + len - 5, "audio", 5)) {
+            audio_ports[channels++] = i;
+        }
+    }
+    if (channels == 0) {
+        SDL_free(audio_ports);
+        return SDL_SetError("No physical JACK ports available");
+    }
+
+    // Jack pretty much demands what it wants.
+    device->spec.format = SDL_AUDIO_F32;
+    device->spec.freq = JACK_jack_get_sample_rate(client);
+    device->spec.channels = channels;
+    device->sample_frames = JACK_jack_get_buffer_size(client);
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    if (!device->iscapture) {
+        device->hidden->iobuffer = (float *)SDL_calloc(1, device->buffer_size);
+        if (!device->hidden->iobuffer) {
+            SDL_free(audio_ports);
+            return SDL_OutOfMemory();
+        }
+    }
+
+    // Build SDL's ports, which we will connect to the device ports.
+    device->hidden->sdlports = (jack_port_t **)SDL_calloc(channels, sizeof(jack_port_t *));
+    if (device->hidden->sdlports == NULL) {
+        SDL_free(audio_ports);
+        return SDL_OutOfMemory();
+    }
+
+    for (i = 0; i < channels; i++) {
+        char portname[32];
+        (void)SDL_snprintf(portname, sizeof(portname), "sdl_jack_%s_%d", sdlportstr, i);
+        device->hidden->sdlports[i] = JACK_jack_port_register(client, portname, JACK_DEFAULT_AUDIO_TYPE, sdlportflags, 0);
+        if (device->hidden->sdlports[i] == NULL) {
+            SDL_free(audio_ports);
+            return SDL_SetError("jack_port_register failed");
+        }
+    }
+
+    if (JACK_jack_set_buffer_size_callback(client, jackBufferSizeCallback, device) != 0) {
+        SDL_free(audio_ports);
+        return SDL_SetError("JACK: Couldn't set buffer size callback");
+    } else if (JACK_jack_set_sample_rate_callback(client, jackSampleRateCallback, device) != 0) {
+        SDL_free(audio_ports);
+        return SDL_SetError("JACK: Couldn't set sample rate callback");
+    } else if (JACK_jack_set_process_callback(client, callback, device) != 0) {
+        SDL_free(audio_ports);
+        return SDL_SetError("JACK: Couldn't set process callback");
+    }
+
+    JACK_jack_on_shutdown(client, jackShutdownCallback, device);
+
+    if (JACK_jack_activate(client) != 0) {
+        SDL_free(audio_ports);
+        return SDL_SetError("Failed to activate JACK client");
+    }
+
+    // once activated, we can connect all the ports.
+    for (i = 0; i < channels; i++) {
+        const char *sdlport = JACK_jack_port_name(device->hidden->sdlports[i]);
+        const char *srcport = iscapture ? devports[audio_ports[i]] : sdlport;
+        const char *dstport = iscapture ? sdlport : devports[audio_ports[i]];
+        if (JACK_jack_connect(client, srcport, dstport) != 0) {
+            SDL_free(audio_ports);
+            return SDL_SetError("Couldn't connect JACK ports: %s => %s", srcport, dstport);
+        }
+    }
+
+    // don't need these anymore.
+    JACK_jack_free(devports);
+    SDL_free(audio_ports);
+
+    // We're ready to rock and roll. :-)
+    return 0;
+}
+
+static void JACK_Deinitialize(void)
+{
+    UnloadJackLibrary();
+}
+
+static SDL_bool JACK_Init(SDL_AudioDriverImpl *impl)
+{
+    if (LoadJackLibrary() < 0) {
+        return SDL_FALSE;
+    } else {
+        // Make sure a JACK server is running and available.
+        jack_status_t status;
+        jack_client_t *client = JACK_jack_client_open("SDL", JackNoStartServer, &status, NULL);
+        if (client == NULL) {
+            UnloadJackLibrary();
+            return SDL_FALSE;
+        }
+        JACK_jack_client_close(client);
+    }
+
+    impl->OpenDevice = JACK_OpenDevice;
+    impl->GetDeviceBuf = JACK_GetDeviceBuf;
+    impl->PlayDevice = JACK_PlayDevice;
+    impl->CloseDevice = JACK_CloseDevice;
+    impl->Deinitialize = JACK_Deinitialize;
+    impl->CaptureFromDevice = JACK_CaptureFromDevice;
+    impl->FlushCapture = JACK_FlushCapture;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+    impl->HasCaptureSupport = SDL_TRUE;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap JACK_bootstrap = {
+    "jack", "JACK Audio Connection Kit", JACK_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_JACK

vendor/sdl-3.0.0/src/audio/jack/SDL_jackaudio.h

@@ -0,0 +1,35 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_jackaudio_h_
+#define SDL_jackaudio_h_
+
+#include <jack/jack.h>
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    jack_client_t *client;
+    jack_port_t **sdlports;
+    float *iobuffer;
+};
+
+#endif // SDL_jackaudio_h_

vendor/sdl-3.0.0/src/audio/n3ds/SDL_n3dsaudio.c

@@ -0,0 +1,287 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_N3DS
+
+// N3DS Audio driver
+
+#include "../SDL_sysaudio.h"
+#include "SDL_n3dsaudio.h"
+
+#define N3DSAUDIO_DRIVER_NAME "n3ds"
+
+static dspHookCookie dsp_hook;
+static SDL_AudioDevice *audio_device;
+
+// fully local functions related to the wavebufs / DSP, not the same as the `device->lock` SDL_Mutex!
+static SDL_INLINE void contextLock(SDL_AudioDevice *device)
+{
+    LightLock_Lock(&device->hidden->lock);
+}
+
+static SDL_INLINE void contextUnlock(SDL_AudioDevice *device)
+{
+    LightLock_Unlock(&device->hidden->lock);
+}
+
+static void N3DSAUD_DspHook(DSP_HookType hook)
+{
+    if (hook == DSPHOOK_ONCANCEL) {
+        contextLock(audio_device);
+        audio_device->hidden->isCancelled = SDL_TRUE;
+        SDL_AudioDeviceDisconnected(audio_device);
+        CondVar_Broadcast(&audio_device->hidden->cv);
+        contextUnlock(audio_device);
+    }
+}
+
+static void AudioFrameFinished(void *vdevice)
+{
+    bool shouldBroadcast = false;
+    unsigned i;
+    SDL_AudioDevice *device = (SDL_AudioDevice *)vdevice;
+
+    contextLock(device);
+
+    for (i = 0; i < NUM_BUFFERS; i++) {
+        if (device->hidden->waveBuf[i].status == NDSP_WBUF_DONE) {
+            device->hidden->waveBuf[i].status = NDSP_WBUF_FREE;
+            shouldBroadcast = SDL_TRUE;
+        }
+    }
+
+    if (shouldBroadcast) {
+        CondVar_Broadcast(&device->hidden->cv);
+    }
+
+    contextUnlock(device);
+}
+
+static int N3DSAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    Result ndsp_init_res;
+    Uint8 *data_vaddr;
+    float mix[12];
+
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Initialise the DSP service
+    ndsp_init_res = ndspInit();
+    if (R_FAILED(ndsp_init_res)) {
+        if ((R_SUMMARY(ndsp_init_res) == RS_NOTFOUND) && (R_MODULE(ndsp_init_res) == RM_DSP)) {
+            SDL_SetError("DSP init failed: dspfirm.cdc missing!");
+        } else {
+            SDL_SetError("DSP init failed. Error code: 0x%lX", ndsp_init_res);
+        }
+        return -1;
+    }
+
+    // Initialise internal state
+    LightLock_Init(&device->hidden->lock);
+    CondVar_Init(&device->hidden->cv);
+
+    if (device->spec.channels > 2) {
+        device->spec.channels = 2;
+    }
+
+    Uint32 format = 0;
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if (test_format == SDL_AUDIO_S8) {  // Signed 8-bit audio supported
+            format = (device->spec.channels == 2) ? NDSP_FORMAT_STEREO_PCM8 : NDSP_FORMAT_MONO_PCM8;
+            break;
+        } else if (test_format == SDL_AUDIO_S16) {  // Signed 16-bit audio supported
+            format = (device->spec.channels == 2) ? NDSP_FORMAT_STEREO_PCM16 : NDSP_FORMAT_MONO_PCM16;
+            break;
+        }
+    }
+
+    if (!test_format) {      // shouldn't happen, but just in case...
+        return SDL_SetError("No supported audio format found.");
+    }
+
+    device->spec.format = test_format;
+
+    // Update the fragment size as size in bytes
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    // Allocate mixing buffer
+    if (device->buffer_size >= SDL_MAX_UINT32 / 2) {
+        return SDL_SetError("Mixing buffer is too large.");
+    }
+
+    device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+    if (device->hidden->mixbuf == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+
+    data_vaddr = (Uint8 *)linearAlloc(device->buffer_size * NUM_BUFFERS);
+    if (data_vaddr == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    SDL_memset(data_vaddr, 0, device->buffer_size * NUM_BUFFERS);
+    DSP_FlushDataCache(data_vaddr, device->buffer_size * NUM_BUFFERS);
+
+    device->hidden->nextbuf = 0;
+
+    ndspChnReset(0);
+
+    ndspChnSetInterp(0, NDSP_INTERP_LINEAR);
+    ndspChnSetRate(0, device->spec.freq);
+    ndspChnSetFormat(0, format);
+
+    SDL_zeroa(mix);
+    mix[0] = mix[1] = 1.0f;
+    ndspChnSetMix(0, mix);
+
+    SDL_memset(device->hidden->waveBuf, 0, sizeof(ndspWaveBuf) * NUM_BUFFERS);
+
+    const int sample_frame_size = SDL_AUDIO_FRAMESIZE(device->spec);
+    for (unsigned i = 0; i < NUM_BUFFERS; i++) {
+        device->hidden->waveBuf[i].data_vaddr = data_vaddr;
+        device->hidden->waveBuf[i].nsamples = device->buffer_size / sample_frame_size;
+        data_vaddr += device->buffer_size;
+    }
+
+    // Setup callback
+    audio_device = device;
+    ndspSetCallback(AudioFrameFinished, device);
+    dspHook(&dsp_hook, N3DSAUD_DspHook);
+
+    return 0;
+}
+
+static int N3DSAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    contextLock(device);
+
+    const size_t nextbuf = device->hidden->nextbuf;
+
+    if (device->hidden->isCancelled ||
+        device->hidden->waveBuf[nextbuf].status != NDSP_WBUF_FREE) {
+        contextUnlock(device);
+        return 0;  // !!! FIXME: is this a fatal error? If so, this should return -1.
+    }
+
+    device->hidden->nextbuf = (nextbuf + 1) % NUM_BUFFERS;
+
+    contextUnlock(device);
+
+    SDL_memcpy((void *)device->hidden->waveBuf[nextbuf].data_vaddr, buffer, buflen);
+    DSP_FlushDataCache(device->hidden->waveBuf[nextbuf].data_vaddr, buflen);
+
+    ndspChnWaveBufAdd(0, &device->hidden->waveBuf[nextbuf]);
+
+    return 0;
+}
+
+static int N3DSAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    contextLock(device);
+    while (!device->hidden->isCancelled && !SDL_AtomicGet(&device->shutdown) &&
+           device->hidden->waveBuf[device->hidden->nextbuf].status != NDSP_WBUF_FREE) {
+        CondVar_Wait(&device->hidden->cv, &device->hidden->lock);
+    }
+    contextUnlock(device);
+    return 0;
+}
+
+static Uint8 *N3DSAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static void N3DSAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (!device->hidden) {
+        return;
+    }
+
+    contextLock(device);
+
+    dspUnhook(&dsp_hook);
+    ndspSetCallback(NULL, NULL);
+
+    if (!device->hidden->isCancelled) {
+        ndspChnReset(0);
+        SDL_memset(device->hidden->waveBuf, 0, sizeof(ndspWaveBuf) * NUM_BUFFERS);
+        CondVar_Broadcast(&device->hidden->cv);
+    }
+
+    contextUnlock(device);
+
+    ndspExit();
+
+    if (device->hidden->waveBuf[0].data_vaddr) {
+        linearFree((void *)device->hidden->waveBuf[0].data_vaddr);
+    }
+
+    if (device->hidden->mixbuf) {
+        SDL_free(device->hidden->mixbuf);
+        device->hidden->mixbuf = NULL;
+    }
+
+    SDL_free(device->hidden);
+    device->hidden = NULL;
+}
+
+static void N3DSAUDIO_ThreadInit(SDL_AudioDevice *device)
+{
+    s32 current_priority = 0x30;
+    svcGetThreadPriority(&current_priority, CUR_THREAD_HANDLE);
+    current_priority--;
+    // 0x18 is reserved for video, 0x30 is the default for main thread
+    current_priority = SDL_clamp(current_priority, 0x19, 0x2F);
+    svcSetThreadPriority(CUR_THREAD_HANDLE, current_priority);
+}
+
+static SDL_bool N3DSAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = N3DSAUDIO_OpenDevice;
+    impl->PlayDevice = N3DSAUDIO_PlayDevice;
+    impl->WaitDevice = N3DSAUDIO_WaitDevice;
+    impl->GetDeviceBuf = N3DSAUDIO_GetDeviceBuf;
+    impl->CloseDevice = N3DSAUDIO_CloseDevice;
+    impl->ThreadInit = N3DSAUDIO_ThreadInit;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+
+    // Should be possible, but micInit would fail
+    impl->HasCaptureSupport = SDL_FALSE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap N3DSAUDIO_bootstrap = {
+    N3DSAUDIO_DRIVER_NAME,
+    "SDL N3DS audio driver",
+    N3DSAUDIO_Init,
+    0
+};
+
+#endif // SDL_AUDIO_DRIVER_N3DS

vendor/sdl-3.0.0/src/audio/n3ds/SDL_n3dsaudio.h

@@ -0,0 +1,40 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_n3dsaudio_h
+#define SDL_n3dsaudio_h
+
+#include <3ds.h>
+
+#define NUM_BUFFERS 3 // -- Minimum 2!
+
+struct SDL_PrivateAudioData
+{
+    // Speaker data
+    Uint8 *mixbuf;
+    Uint32 nextbuf;
+    ndspWaveBuf waveBuf[NUM_BUFFERS];
+    LightLock lock;
+    CondVar cv;
+    SDL_bool isCancelled;
+};
+
+#endif // SDL_n3dsaudio_h

vendor/sdl-3.0.0/src/audio/netbsd/SDL_netbsdaudio.c

@@ -0,0 +1,328 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_NETBSD
+
+// Driver for native NetBSD audio(4).
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/audioio.h>
+
+#include "../../core/unix/SDL_poll.h"
+#include "../SDL_audiodev_c.h"
+#include "SDL_netbsdaudio.h"
+
+//#define DEBUG_AUDIO
+
+static void NETBSDAUDIO_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    SDL_EnumUnixAudioDevices(SDL_FALSE, NULL);
+}
+
+static void NETBSDAUDIO_Status(SDL_AudioDevice *device)
+{
+#ifdef DEBUG_AUDIO
+    /* *INDENT-OFF* */ /* clang-format off */
+    audio_info_t info;
+    const struct audio_prinfo *prinfo;
+
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
+        fprintf(stderr, "AUDIO_GETINFO failed.\n");
+        return;
+    }
+
+    prinfo = device->iscapture ? &info.record : &info.play;
+
+    fprintf(stderr, "\n"
+            "[%s info]\n"
+            "buffer size	:   %d bytes\n"
+            "sample rate	:   %i Hz\n"
+            "channels	:   %i\n"
+            "precision	:   %i-bit\n"
+            "encoding	:   0x%x\n"
+            "seek		:   %i\n"
+            "sample count	:   %i\n"
+            "EOF count	:   %i\n"
+            "paused		:   %s\n"
+            "error occurred	:   %s\n"
+            "waiting		:   %s\n"
+            "active		:   %s\n"
+            "",
+            device->iscapture ? "record" : "play",
+            prinfo->buffer_size,
+            prinfo->sample_rate,
+            prinfo->channels,
+            prinfo->precision,
+            prinfo->encoding,
+            prinfo->seek,
+            prinfo->samples,
+            prinfo->eof,
+            prinfo->pause ? "yes" : "no",
+            prinfo->error ? "yes" : "no",
+            prinfo->waiting ? "yes" : "no",
+            prinfo->active ? "yes" : "no");
+
+    fprintf(stderr, "\n"
+            "[audio info]\n"
+            "monitor_gain	:   %i\n"
+            "hw block size	:   %d bytes\n"
+            "hi watermark	:   %i\n"
+            "lo watermark	:   %i\n"
+            "audio mode	:   %s\n"
+            "",
+            info.monitor_gain,
+            info.blocksize,
+            info.hiwat, info.lowat,
+            (info.mode == AUMODE_PLAY) ? "PLAY"
+            : (info.mode == AUMODE_RECORD) ? "RECORD"
+            : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
+
+    fprintf(stderr, "\n"
+            "[audio spec]\n"
+            "format		:   0x%x\n"
+            "size		:   %u\n"
+            "",
+            device->spec.format,
+            device->buffer_size);
+    /* *INDENT-ON* */ /* clang-format on */
+
+#endif // DEBUG_AUDIO
+}
+
+static int NETBSDAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    const SDL_bool iscapture = device->iscapture;
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        audio_info_t info;
+        const int rc = ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info);
+        if (rc < 0) {
+            if (errno == EAGAIN) {
+                continue;
+            }
+            // Hmm, not much we can do - abort
+            fprintf(stderr, "netbsdaudio WaitDevice ioctl failed (unrecoverable): %s\n", strerror(errno));
+            return -1;
+        }
+        const size_t remain = (size_t)((iscapture ? info.record.seek : info.play.seek) * SDL_AUDIO_BYTESIZE(device->spec.format));
+        if (!iscapture && (remain >= device->buffer_size)) {
+            SDL_Delay(10);
+        } else if (iscapture && (remain < device->buffer_size)) {
+            SDL_Delay(10);
+        } else {
+            break; // ready to go!
+        }
+    }
+
+    return 0;
+}
+
+static int NETBSDAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    const int written = write(h->audio_fd, buffer, buflen);
+    if (written != buflen) {  // Treat even partial writes as fatal errors.
+        return -1;
+    }
+
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+    return 0;
+}
+
+static Uint8 *NETBSDAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int NETBSDAUDIO_CaptureFromDevice(SDL_AudioDevice *device, void *vbuffer, int buflen)
+{
+    Uint8 *buffer = (Uint8 *)vbuffer;
+    const int br = read(device->hidden->audio_fd, buffer, buflen);
+    if (br == -1) {
+        // Non recoverable error has occurred. It should be reported!!!
+        perror("audio");
+        return -1;
+    }
+
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Captured %d bytes of audio data\n", br);
+#endif
+    return br;
+}
+
+static void NETBSDAUDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    audio_info_t info;
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) == 0) {
+        size_t remain = (size_t)(info.record.seek * SDL_AUDIO_BYTESIZE(device->spec.format));
+        while (remain > 0) {
+            char buf[512];
+            const size_t len = SDL_min(sizeof(buf), remain);
+            const ssize_t br = read(h->audio_fd, buf, len);
+            if (br <= 0) {
+                break;
+            }
+            remain -= br;
+        }
+    }
+}
+
+static void NETBSDAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_fd >= 0) {
+            close(device->hidden->audio_fd);
+        }
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int NETBSDAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    const SDL_bool iscapture = device->iscapture;
+    int encoding = AUDIO_ENCODING_NONE;
+    audio_info_t info, hwinfo;
+    struct audio_prinfo *prinfo = iscapture ? &info.record : &info.play;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Open the audio device; we hardcode the device path in `device->name` for lack of better info, so use that.
+    const int flags = ((device->iscapture) ? O_RDONLY : O_WRONLY);
+    device->hidden->audio_fd = open(device->name, flags | O_CLOEXEC);
+    if (device->hidden->audio_fd < 0) {
+        return SDL_SetError("Couldn't open %s: %s", device->name, strerror(errno));
+    }
+
+    AUDIO_INITINFO(&info);
+
+#ifdef AUDIO_GETFORMAT // Introduced in NetBSD 9.0
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETFORMAT, &hwinfo) != -1) {
+        // Use the device's native sample rate so the kernel doesn't have to resample.
+        device->spec.freq = iscapture ? hwinfo.record.sample_rate : hwinfo.play.sample_rate;
+    }
+#endif
+
+    prinfo->sample_rate = device->spec.freq;
+    prinfo->channels = device->spec.channels;
+
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+            encoding = AUDIO_ENCODING_ULINEAR;
+            break;
+        case SDL_AUDIO_S8:
+            encoding = AUDIO_ENCODING_SLINEAR;
+            break;
+        case SDL_AUDIO_S16LE:
+            encoding = AUDIO_ENCODING_SLINEAR_LE;
+            break;
+        case SDL_AUDIO_S16BE:
+            encoding = AUDIO_ENCODING_SLINEAR_BE;
+            break;
+        case SDL_AUDIO_S32LE:
+            encoding = AUDIO_ENCODING_SLINEAR_LE;
+            break;
+        case SDL_AUDIO_S32BE:
+            encoding = AUDIO_ENCODING_SLINEAR_BE;
+            break;
+        default:
+            continue;
+        }
+        break;
+    }
+
+    if (!test_format) {
+        return SDL_SetError("%s: Unsupported audio format", "netbsd");
+    }
+    prinfo->encoding = encoding;
+    prinfo->precision = SDL_AUDIO_BITSIZE(test_format);
+
+    info.hiwat = 5;
+    info.lowat = 3;
+    if (ioctl(device->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
+        return SDL_SetError("AUDIO_SETINFO failed for %s: %s", device->name, strerror(errno));
+    }
+
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
+        return SDL_SetError("AUDIO_GETINFO failed for %s: %s", device->name, strerror(errno));
+    }
+
+    // Final spec used for the device.
+    device->spec.format = test_format;
+    device->spec.freq = prinfo->sample_rate;
+    device->spec.channels = prinfo->channels;
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    if (!iscapture) {
+        // Allocate mixing buffer
+        device->hidden->mixlen = device->buffer_size;
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->hidden->mixlen);
+        if (device->hidden->mixbuf == NULL) {
+            return SDL_OutOfMemory();
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+    NETBSDAUDIO_Status(device);
+
+    return 0;  // We're ready to rock and roll. :-)
+}
+
+static SDL_bool NETBSDAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->DetectDevices = NETBSDAUDIO_DetectDevices;
+    impl->OpenDevice = NETBSDAUDIO_OpenDevice;
+    impl->WaitDevice = NETBSDAUDIO_WaitDevice;
+    impl->PlayDevice = NETBSDAUDIO_PlayDevice;
+    impl->GetDeviceBuf = NETBSDAUDIO_GetDeviceBuf;
+    impl->CloseDevice = NETBSDAUDIO_CloseDevice;
+    impl->WaitCaptureDevice = NETBSDAUDIO_WaitDevice;
+    impl->CaptureFromDevice = NETBSDAUDIO_CaptureFromDevice;
+    impl->FlushCapture = NETBSDAUDIO_FlushCapture;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap NETBSDAUDIO_bootstrap = {
+    "netbsd", "NetBSD audio", NETBSDAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_NETBSD

vendor/sdl-3.0.0/src/audio/netbsd/SDL_netbsdaudio.h

@@ -0,0 +1,44 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_netbsdaudio_h_
+#define SDL_netbsdaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // The file descriptor for the audio device
+    int audio_fd;
+
+    // Raw mixing buffer
+    Uint8 *mixbuf;
+    int mixlen;
+
+    // Support for audio timing using a timer, in addition to SDL_IOReady()
+    float frame_ticks;
+    float next_frame;
+};
+
+#define FUDGE_TICKS 10 // The scheduler overhead ticks per frame
+
+#endif // SDL_netbsdaudio_h_

vendor/sdl-3.0.0/src/audio/openslES/SDL_openslES.c

@@ -0,0 +1,782 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_OPENSLES
+
+// For more discussion of low latency audio on Android, see this:
+//   https://googlesamples.github.io/android-audio-high-performance/guides/opensl_es.html
+
+#include "../SDL_sysaudio.h"
+#include "SDL_openslES.h"
+
+#include "../../core/android/SDL_android.h"
+#include <SLES/OpenSLES.h>
+#include <SLES/OpenSLES_Android.h>
+#include <android/log.h>
+
+
+#define NUM_BUFFERS 2 // -- Don't lower this!
+
+struct SDL_PrivateAudioData
+{
+    Uint8 *mixbuff;
+    int next_buffer;
+    Uint8 *pmixbuff[NUM_BUFFERS];
+    SDL_Semaphore *playsem;
+};
+
+#if 0
+#define LOG_TAG   "SDL_openslES"
+#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
+#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
+//#define LOGV(...)  __android_log_print(ANDROID_LOG_VERBOSE,LOG_TAG,__VA_ARGS__)
+#define LOGV(...)
+#else
+#define LOGE(...)
+#define LOGI(...)
+#define LOGV(...)
+#endif
+
+/*
+#define SL_SPEAKER_FRONT_LEFT            ((SLuint32) 0x00000001)
+#define SL_SPEAKER_FRONT_RIGHT           ((SLuint32) 0x00000002)
+#define SL_SPEAKER_FRONT_CENTER          ((SLuint32) 0x00000004)
+#define SL_SPEAKER_LOW_FREQUENCY         ((SLuint32) 0x00000008)
+#define SL_SPEAKER_BACK_LEFT             ((SLuint32) 0x00000010)
+#define SL_SPEAKER_BACK_RIGHT            ((SLuint32) 0x00000020)
+#define SL_SPEAKER_FRONT_LEFT_OF_CENTER  ((SLuint32) 0x00000040)
+#define SL_SPEAKER_FRONT_RIGHT_OF_CENTER ((SLuint32) 0x00000080)
+#define SL_SPEAKER_BACK_CENTER           ((SLuint32) 0x00000100)
+#define SL_SPEAKER_SIDE_LEFT             ((SLuint32) 0x00000200)
+#define SL_SPEAKER_SIDE_RIGHT            ((SLuint32) 0x00000400)
+#define SL_SPEAKER_TOP_CENTER            ((SLuint32) 0x00000800)
+#define SL_SPEAKER_TOP_FRONT_LEFT        ((SLuint32) 0x00001000)
+#define SL_SPEAKER_TOP_FRONT_CENTER      ((SLuint32) 0x00002000)
+#define SL_SPEAKER_TOP_FRONT_RIGHT       ((SLuint32) 0x00004000)
+#define SL_SPEAKER_TOP_BACK_LEFT         ((SLuint32) 0x00008000)
+#define SL_SPEAKER_TOP_BACK_CENTER       ((SLuint32) 0x00010000)
+#define SL_SPEAKER_TOP_BACK_RIGHT        ((SLuint32) 0x00020000)
+*/
+#define SL_ANDROID_SPEAKER_STEREO (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT)
+#define SL_ANDROID_SPEAKER_QUAD   (SL_ANDROID_SPEAKER_STEREO | SL_SPEAKER_BACK_LEFT | SL_SPEAKER_BACK_RIGHT)
+#define SL_ANDROID_SPEAKER_5DOT1  (SL_ANDROID_SPEAKER_QUAD | SL_SPEAKER_FRONT_CENTER | SL_SPEAKER_LOW_FREQUENCY)
+#define SL_ANDROID_SPEAKER_7DOT1  (SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_SIDE_LEFT | SL_SPEAKER_SIDE_RIGHT)
+
+// engine interfaces
+static SLObjectItf engineObject = NULL;
+static SLEngineItf engineEngine = NULL;
+
+// output mix interfaces
+static SLObjectItf outputMixObject = NULL;
+
+// buffer queue player interfaces
+static SLObjectItf bqPlayerObject = NULL;
+static SLPlayItf bqPlayerPlay = NULL;
+static SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue = NULL;
+#if 0
+static SLVolumeItf bqPlayerVolume;
+#endif
+
+// recorder interfaces
+static SLObjectItf recorderObject = NULL;
+static SLRecordItf recorderRecord = NULL;
+static SLAndroidSimpleBufferQueueItf recorderBufferQueue = NULL;
+
+#if 0
+static const char *sldevaudiorecorderstr = "SLES Audio Recorder";
+static const char *sldevaudioplayerstr   = "SLES Audio Player";
+
+#define SLES_DEV_AUDIO_RECORDER sldevaudiorecorderstr
+#define SLES_DEV_AUDIO_PLAYER   sldevaudioplayerstr
+static void OPENSLES_DetectDevices( int iscapture )
+{
+    LOGI( "openSLES_DetectDevices()" );
+    if ( iscapture )
+            addfn( SLES_DEV_AUDIO_RECORDER );
+    else
+            addfn( SLES_DEV_AUDIO_PLAYER );
+}
+#endif
+
+static void OPENSLES_DestroyEngine(void)
+{
+    LOGI("OPENSLES_DestroyEngine()");
+
+    // destroy output mix object, and invalidate all associated interfaces
+    if (outputMixObject != NULL) {
+        (*outputMixObject)->Destroy(outputMixObject);
+        outputMixObject = NULL;
+    }
+
+    // destroy engine object, and invalidate all associated interfaces
+    if (engineObject != NULL) {
+        (*engineObject)->Destroy(engineObject);
+        engineObject = NULL;
+        engineEngine = NULL;
+    }
+}
+
+static int OPENSLES_CreateEngine(void)
+{
+    const SLInterfaceID ids[1] = { SL_IID_VOLUME };
+    const SLboolean req[1] = { SL_BOOLEAN_FALSE };
+    SLresult result;
+
+    LOGI("openSLES_CreateEngine()");
+
+    // create engine
+    result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("slCreateEngine failed: %d", result);
+        goto error;
+    }
+    LOGI("slCreateEngine OK");
+
+    // realize the engine
+    result = (*engineObject)->Realize(engineObject, SL_BOOLEAN_FALSE);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RealizeEngine failed: %d", result);
+        goto error;
+    }
+    LOGI("RealizeEngine OK");
+
+    // get the engine interface, which is needed in order to create other objects
+    result = (*engineObject)->GetInterface(engineObject, SL_IID_ENGINE, &engineEngine);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("EngineGetInterface failed: %d", result);
+        goto error;
+    }
+    LOGI("EngineGetInterface OK");
+
+    // create output mix
+    result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 1, ids, req);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("CreateOutputMix failed: %d", result);
+        goto error;
+    }
+    LOGI("CreateOutputMix OK");
+
+    // realize the output mix
+    result = (*outputMixObject)->Realize(outputMixObject, SL_BOOLEAN_FALSE);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RealizeOutputMix failed: %d", result);
+        goto error;
+    }
+    return 1;
+
+error:
+    OPENSLES_DestroyEngine();
+    return 0;
+}
+
+// this callback handler is called every time a buffer finishes recording
+static void bqRecorderCallback(SLAndroidSimpleBufferQueueItf bq, void *context)
+{
+    struct SDL_PrivateAudioData *audiodata = (struct SDL_PrivateAudioData *)context;
+
+    LOGV("SLES: Recording Callback");
+    SDL_PostSemaphore(audiodata->playsem);
+}
+
+static void OPENSLES_DestroyPCMRecorder(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+    SLresult result;
+
+    // stop recording
+    if (recorderRecord != NULL) {
+        result = (*recorderRecord)->SetRecordState(recorderRecord, SL_RECORDSTATE_STOPPED);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("SetRecordState stopped: %d", result);
+        }
+    }
+
+    // destroy audio recorder object, and invalidate all associated interfaces
+    if (recorderObject != NULL) {
+        (*recorderObject)->Destroy(recorderObject);
+        recorderObject = NULL;
+        recorderRecord = NULL;
+        recorderBufferQueue = NULL;
+    }
+
+    if (audiodata->playsem) {
+        SDL_DestroySemaphore(audiodata->playsem);
+        audiodata->playsem = NULL;
+    }
+
+    if (audiodata->mixbuff) {
+        SDL_free(audiodata->mixbuff);
+    }
+}
+
+static int OPENSLES_CreatePCMRecorder(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+    SLDataFormat_PCM format_pcm;
+    SLDataLocator_AndroidSimpleBufferQueue loc_bufq;
+    SLDataSink audioSnk;
+    SLDataLocator_IODevice loc_dev;
+    SLDataSource audioSrc;
+    const SLInterfaceID ids[1] = { SL_IID_ANDROIDSIMPLEBUFFERQUEUE };
+    const SLboolean req[1] = { SL_BOOLEAN_TRUE };
+    SLresult result;
+    int i;
+
+    if (!Android_JNI_RequestPermission("android.permission.RECORD_AUDIO")) {
+        LOGE("This app doesn't have RECORD_AUDIO permission");
+        return SDL_SetError("This app doesn't have RECORD_AUDIO permission");
+    }
+
+    // Just go with signed 16-bit audio as it's the most compatible
+    device->spec.format = SDL_AUDIO_S16;
+    device->spec.channels = 1;
+    //device->spec.freq = SL_SAMPLINGRATE_16 / 1000;*/
+
+    // Update the fragment size as size in bytes
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    LOGI("Try to open %u hz %u bit chan %u %s samples %u",
+         device->spec.freq, SDL_AUDIO_BITSIZE(device->spec.format),
+         device->spec.channels, (device->spec.format & 0x1000) ? "BE" : "LE", device->sample_frames);
+
+    // configure audio source
+    loc_dev.locatorType = SL_DATALOCATOR_IODEVICE;
+    loc_dev.deviceType = SL_IODEVICE_AUDIOINPUT;
+    loc_dev.deviceID = SL_DEFAULTDEVICEID_AUDIOINPUT;
+    loc_dev.device = NULL;
+    audioSrc.pLocator = &loc_dev;
+    audioSrc.pFormat = NULL;
+
+    // configure audio sink
+    loc_bufq.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
+    loc_bufq.numBuffers = NUM_BUFFERS;
+
+    format_pcm.formatType = SL_DATAFORMAT_PCM;
+    format_pcm.numChannels = device->spec.channels;
+    format_pcm.samplesPerSec = device->spec.freq * 1000; // / kilo Hz to milli Hz
+    format_pcm.bitsPerSample = SDL_AUDIO_BITSIZE(device->spec.format);
+    format_pcm.containerSize = SDL_AUDIO_BITSIZE(device->spec.format);
+    format_pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
+    format_pcm.channelMask = SL_SPEAKER_FRONT_CENTER;
+
+    audioSnk.pLocator = &loc_bufq;
+    audioSnk.pFormat = &format_pcm;
+
+    // create audio recorder
+    // (requires the RECORD_AUDIO permission)
+    result = (*engineEngine)->CreateAudioRecorder(engineEngine, &recorderObject, &audioSrc, &audioSnk, 1, ids, req);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("CreateAudioRecorder failed: %d", result);
+        goto failed;
+    }
+
+    // realize the recorder
+    result = (*recorderObject)->Realize(recorderObject, SL_BOOLEAN_FALSE);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RealizeAudioPlayer failed: %d", result);
+        goto failed;
+    }
+
+    // get the record interface
+    result = (*recorderObject)->GetInterface(recorderObject, SL_IID_RECORD, &recorderRecord);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("SL_IID_RECORD interface get failed: %d", result);
+        goto failed;
+    }
+
+    // get the buffer queue interface
+    result = (*recorderObject)->GetInterface(recorderObject, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, &recorderBufferQueue);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("SL_IID_BUFFERQUEUE interface get failed: %d", result);
+        goto failed;
+    }
+
+    // register callback on the buffer queue
+    // context is '(SDL_PrivateAudioData *)device->hidden'
+    result = (*recorderBufferQueue)->RegisterCallback(recorderBufferQueue, bqRecorderCallback, device->hidden);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RegisterCallback failed: %d", result);
+        goto failed;
+    }
+
+    // Create the audio buffer semaphore
+    audiodata->playsem = SDL_CreateSemaphore(0);
+    if (!audiodata->playsem) {
+        LOGE("cannot create Semaphore!");
+        goto failed;
+    }
+
+    // Create the sound buffers
+    audiodata->mixbuff = (Uint8 *)SDL_malloc(NUM_BUFFERS * device->buffer_size);
+    if (audiodata->mixbuff == NULL) {
+        LOGE("mixbuffer allocate - out of memory");
+        goto failed;
+    }
+
+    for (i = 0; i < NUM_BUFFERS; i++) {
+        audiodata->pmixbuff[i] = audiodata->mixbuff + i * device->buffer_size;
+    }
+
+    // in case already recording, stop recording and clear buffer queue
+    result = (*recorderRecord)->SetRecordState(recorderRecord, SL_RECORDSTATE_STOPPED);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("Record set state failed: %d", result);
+        goto failed;
+    }
+
+    // enqueue empty buffers to be filled by the recorder
+    for (i = 0; i < NUM_BUFFERS; i++) {
+        result = (*recorderBufferQueue)->Enqueue(recorderBufferQueue, audiodata->pmixbuff[i], device->buffer_size);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("Record enqueue buffers failed: %d", result);
+            goto failed;
+        }
+    }
+
+    // start recording
+    result = (*recorderRecord)->SetRecordState(recorderRecord, SL_RECORDSTATE_RECORDING);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("Record set state failed: %d", result);
+        goto failed;
+    }
+
+    return 0;
+
+failed:
+    return SDL_SetError("Open device failed!");
+}
+
+// this callback handler is called every time a buffer finishes playing
+static void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context)
+{
+    struct SDL_PrivateAudioData *audiodata = (struct SDL_PrivateAudioData *)context;
+
+    LOGV("SLES: Playback Callback");
+    SDL_PostSemaphore(audiodata->playsem);
+}
+
+static void OPENSLES_DestroyPCMPlayer(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    // set the player's state to 'stopped'
+    if (bqPlayerPlay != NULL) {
+        const SLresult result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_STOPPED);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("SetPlayState stopped failed: %d", result);
+        }
+    }
+
+    // destroy buffer queue audio player object, and invalidate all associated interfaces
+    if (bqPlayerObject != NULL) {
+        (*bqPlayerObject)->Destroy(bqPlayerObject);
+
+        bqPlayerObject = NULL;
+        bqPlayerPlay = NULL;
+        bqPlayerBufferQueue = NULL;
+    }
+
+    if (audiodata->playsem) {
+        SDL_DestroySemaphore(audiodata->playsem);
+        audiodata->playsem = NULL;
+    }
+
+    if (audiodata->mixbuff) {
+        SDL_free(audiodata->mixbuff);
+    }
+}
+
+static int OPENSLES_CreatePCMPlayer(SDL_AudioDevice *device)
+{
+    /* If we want to add floating point audio support (requires API level 21)
+       it can be done as described here:
+        https://developer.android.com/ndk/guides/audio/opensl/android-extensions.html#floating-point
+    */
+    if (SDL_GetAndroidSDKVersion() >= 21) {
+        const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+        SDL_AudioFormat test_format;
+        while ((test_format = *(closefmts++)) != 0) {
+            if (SDL_AUDIO_ISSIGNED(test_format)) {
+                break;
+            }
+        }
+
+        if (!test_format) {
+            // Didn't find a compatible format :
+            LOGI("No compatible audio format, using signed 16-bit audio");
+            test_format = SDL_AUDIO_S16;
+        }
+        device->spec.format = test_format;
+    } else {
+        // Just go with signed 16-bit audio as it's the most compatible
+        device->spec.format = SDL_AUDIO_S16;
+    }
+
+    // Update the fragment size as size in bytes
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    LOGI("Try to open %u hz %s %u bit chan %u %s samples %u",
+         device->spec.freq, SDL_AUDIO_ISFLOAT(device->spec.format) ? "float" : "pcm", SDL_AUDIO_BITSIZE(device->spec.format),
+         device->spec.channels, (device->spec.format & 0x1000) ? "BE" : "LE", device->sample_frames);
+
+    // configure audio source
+    SLDataLocator_AndroidSimpleBufferQueue loc_bufq;
+    loc_bufq.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
+    loc_bufq.numBuffers = NUM_BUFFERS;
+
+    SLDataFormat_PCM format_pcm;
+    format_pcm.formatType = SL_DATAFORMAT_PCM;
+    format_pcm.numChannels = device->spec.channels;
+    format_pcm.samplesPerSec = device->spec.freq * 1000; // / kilo Hz to milli Hz
+    format_pcm.bitsPerSample = SDL_AUDIO_BITSIZE(device->spec.format);
+    format_pcm.containerSize = SDL_AUDIO_BITSIZE(device->spec.format);
+
+    if (SDL_AUDIO_ISBIGENDIAN(device->spec.format)) {
+        format_pcm.endianness = SL_BYTEORDER_BIGENDIAN;
+    } else {
+        format_pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
+    }
+
+    switch (device->spec.channels) {
+    case 1:
+        format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT;
+        break;
+    case 2:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_STEREO;
+        break;
+    case 3:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_STEREO | SL_SPEAKER_FRONT_CENTER;
+        break;
+    case 4:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_QUAD;
+        break;
+    case 5:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_QUAD | SL_SPEAKER_FRONT_CENTER;
+        break;
+    case 6:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_5DOT1;
+        break;
+    case 7:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_BACK_CENTER;
+        break;
+    case 8:
+        format_pcm.channelMask = SL_ANDROID_SPEAKER_7DOT1;
+        break;
+    default:
+        // Unknown number of channels, fall back to stereo
+        device->spec.channels = 2;
+        format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
+        break;
+    }
+
+    SLDataSink audioSnk;
+    SLDataSource audioSrc;
+    audioSrc.pFormat = (void *)&format_pcm;
+
+    SLAndroidDataFormat_PCM_EX format_pcm_ex;
+    if (SDL_AUDIO_ISFLOAT(device->spec.format)) {
+        // Copy all setup into PCM EX structure
+        format_pcm_ex.formatType = SL_ANDROID_DATAFORMAT_PCM_EX;
+        format_pcm_ex.endianness = format_pcm.endianness;
+        format_pcm_ex.channelMask = format_pcm.channelMask;
+        format_pcm_ex.numChannels = format_pcm.numChannels;
+        format_pcm_ex.sampleRate = format_pcm.samplesPerSec;
+        format_pcm_ex.bitsPerSample = format_pcm.bitsPerSample;
+        format_pcm_ex.containerSize = format_pcm.containerSize;
+        format_pcm_ex.representation = SL_ANDROID_PCM_REPRESENTATION_FLOAT;
+        audioSrc.pFormat = (void *)&format_pcm_ex;
+    }
+
+    audioSrc.pLocator = &loc_bufq;
+
+    // configure audio sink
+    SLDataLocator_OutputMix loc_outmix;
+    loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
+    loc_outmix.outputMix = outputMixObject;
+    audioSnk.pLocator = &loc_outmix;
+    audioSnk.pFormat = NULL;
+
+    // create audio player
+    const SLInterfaceID ids[2] = { SL_IID_ANDROIDSIMPLEBUFFERQUEUE, SL_IID_VOLUME };
+    const SLboolean req[2] = { SL_BOOLEAN_TRUE, SL_BOOLEAN_FALSE };
+    SLresult result;
+    result = (*engineEngine)->CreateAudioPlayer(engineEngine, &bqPlayerObject, &audioSrc, &audioSnk, 2, ids, req);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("CreateAudioPlayer failed: %d", result);
+        goto failed;
+    }
+
+    // realize the player
+    result = (*bqPlayerObject)->Realize(bqPlayerObject, SL_BOOLEAN_FALSE);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RealizeAudioPlayer failed: %d", result);
+        goto failed;
+    }
+
+    // get the play interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_PLAY, &bqPlayerPlay);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("SL_IID_PLAY interface get failed: %d", result);
+        goto failed;
+    }
+
+    // get the buffer queue interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, &bqPlayerBufferQueue);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("SL_IID_BUFFERQUEUE interface get failed: %d", result);
+        goto failed;
+    }
+
+    // register callback on the buffer queue
+    // context is '(SDL_PrivateAudioData *)device->hidden'
+    result = (*bqPlayerBufferQueue)->RegisterCallback(bqPlayerBufferQueue, bqPlayerCallback, device->hidden);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("RegisterCallback failed: %d", result);
+        goto failed;
+    }
+
+#if 0
+    // get the volume interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_VOLUME, &bqPlayerVolume);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("SL_IID_VOLUME interface get failed: %d", result);
+        // goto failed;
+    }
+#endif
+
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    // Create the audio buffer semaphore
+    audiodata->playsem = SDL_CreateSemaphore(NUM_BUFFERS - 1);
+    if (!audiodata->playsem) {
+        LOGE("cannot create Semaphore!");
+        goto failed;
+    }
+
+    // Create the sound buffers
+    audiodata->mixbuff = (Uint8 *)SDL_malloc(NUM_BUFFERS * device->buffer_size);
+    if (audiodata->mixbuff == NULL) {
+        LOGE("mixbuffer allocate - out of memory");
+        goto failed;
+    }
+
+    for (int i = 0; i < NUM_BUFFERS; i++) {
+        audiodata->pmixbuff[i] = audiodata->mixbuff + i * device->buffer_size;
+    }
+
+    // set the player's state to playing
+    result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PLAYING);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("Play set state failed: %d", result);
+        goto failed;
+    }
+
+    return 0;
+
+failed:
+    return -1;
+}
+
+static int OPENSLES_OpenDevice(SDL_AudioDevice *device)
+{
+    device->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    if (device->iscapture) {
+        LOGI("OPENSLES_OpenDevice() for capture");
+        return OPENSLES_CreatePCMRecorder(device);
+    } else {
+        int ret;
+        LOGI("OPENSLES_OpenDevice() for playing");
+        ret = OPENSLES_CreatePCMPlayer(device);
+        if (ret < 0) {
+            // Another attempt to open the device with a lower frequency
+            if (device->spec.freq > 48000) {
+                OPENSLES_DestroyPCMPlayer(device);
+                device->spec.freq = 48000;
+                ret = OPENSLES_CreatePCMPlayer(device);
+            }
+        }
+
+        if (ret != 0) {
+            return SDL_SetError("Open device failed!");
+        }
+    }
+
+    return 0;
+}
+
+static int OPENSLES_WaitDevice(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    LOGV("OPENSLES_WaitDevice()");
+
+    // Wait for an audio chunk to finish
+    return SDL_WaitSemaphore(audiodata->playsem);
+}
+
+static int OPENSLES_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    LOGV("======OPENSLES_PlayDevice()======");
+
+    // Queue it up
+    const SLresult result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, buffer, buflen);
+
+    audiodata->next_buffer++;
+    if (audiodata->next_buffer >= NUM_BUFFERS) {
+        audiodata->next_buffer = 0;
+    }
+
+    // If Enqueue fails, callback won't be called.
+    // Post the semaphore, not to run out of buffer
+    if (SL_RESULT_SUCCESS != result) {
+        SDL_PostSemaphore(audiodata->playsem);
+    }
+
+    return 0;
+}
+
+///           n   playn sem
+// getbuf     0   -     1
+// fill buff  0   -     1
+// play       0 - 0     1
+// wait       1   0     0
+// getbuf     1   0     0
+// fill buff  1   0     0
+// play       0   0     0
+// wait
+//
+// okay..
+
+static Uint8 *OPENSLES_GetDeviceBuf(SDL_AudioDevice *device, int *bufsize)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    LOGV("OPENSLES_GetDeviceBuf()");
+    return audiodata->pmixbuff[audiodata->next_buffer];
+}
+
+static int OPENSLES_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *audiodata = device->hidden;
+
+    // Copy it to the output buffer
+    SDL_assert(buflen == device->buffer_size);
+    SDL_memcpy(buffer, audiodata->pmixbuff[audiodata->next_buffer], device->buffer_size);
+
+    // Re-enqueue the buffer
+    const SLresult result = (*recorderBufferQueue)->Enqueue(recorderBufferQueue, audiodata->pmixbuff[audiodata->next_buffer], device->buffer_size);
+    if (SL_RESULT_SUCCESS != result) {
+        LOGE("Record enqueue buffers failed: %d", result);
+        return -1;
+    }
+
+    audiodata->next_buffer++;
+    if (audiodata->next_buffer >= NUM_BUFFERS) {
+        audiodata->next_buffer = 0;
+    }
+
+    return device->buffer_size;
+}
+
+static void OPENSLES_CloseDevice(SDL_AudioDevice *device)
+{
+    // struct SDL_PrivateAudioData *audiodata = device->hidden;
+    if (device->hidden) {
+        if (device->iscapture) {
+            LOGI("OPENSLES_CloseDevice() for capture");
+            OPENSLES_DestroyPCMRecorder(device);
+        } else {
+            LOGI("OPENSLES_CloseDevice() for playing");
+            OPENSLES_DestroyPCMPlayer(device);
+        }
+
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static SDL_bool OPENSLES_Init(SDL_AudioDriverImpl *impl)
+{
+    LOGI("OPENSLES_Init() called");
+
+    if (!OPENSLES_CreateEngine()) {
+        return SDL_FALSE;
+    }
+
+    LOGI("OPENSLES_Init() - set pointers");
+
+    // Set the function pointers
+    // impl->DetectDevices = OPENSLES_DetectDevices;
+    impl->ThreadInit = Android_AudioThreadInit;
+    impl->OpenDevice = OPENSLES_OpenDevice;
+    impl->WaitDevice = OPENSLES_WaitDevice;
+    impl->PlayDevice = OPENSLES_PlayDevice;
+    impl->GetDeviceBuf = OPENSLES_GetDeviceBuf;
+    impl->WaitCaptureDevice = OPENSLES_WaitDevice;
+    impl->CaptureFromDevice = OPENSLES_CaptureFromDevice;
+    impl->CloseDevice = OPENSLES_CloseDevice;
+    impl->Deinitialize = OPENSLES_DestroyEngine;
+
+    // and the capabilities
+    impl->HasCaptureSupport = SDL_TRUE;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+
+    LOGI("OPENSLES_Init() - success");
+
+    // this audio target is available.
+    return SDL_TRUE;
+}
+
+AudioBootStrap OPENSLES_bootstrap = {
+    "openslES", "OpenSL ES audio driver", OPENSLES_Init, SDL_FALSE
+};
+
+void OPENSLES_ResumeDevices(void)
+{
+    if (bqPlayerPlay != NULL) {
+        // set the player's state to 'playing'
+        SLresult result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PLAYING);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("OPENSLES_ResumeDevices failed: %d", result);
+        }
+    }
+}
+
+void OPENSLES_PauseDevices(void)
+{
+    if (bqPlayerPlay != NULL) {
+        // set the player's state to 'paused'
+        SLresult result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PAUSED);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("OPENSLES_PauseDevices failed: %d", result);
+        }
+    }
+}
+
+#endif // SDL_AUDIO_DRIVER_OPENSLES

vendor/sdl-3.0.0/src/audio/openslES/SDL_openslES.h

@@ -0,0 +1,38 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_openslesaudio_h_
+#define SDL_openslesaudio_h_
+
+#ifdef SDL_AUDIO_DRIVER_OPENSLES
+
+void OPENSLES_ResumeDevices(void);
+void OPENSLES_PauseDevices(void);
+
+#else
+
+static void OPENSLES_ResumeDevices(void) {}
+static void OPENSLES_PauseDevices(void) {}
+
+#endif
+
+#endif // SDL_openslesaudio_h_

vendor/sdl-3.0.0/src/audio/pipewire/SDL_pipewire.h

@@ -0,0 +1,43 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifndef SDL_pipewire_h_
+#define SDL_pipewire_h_
+
+#include "../SDL_sysaudio.h"
+#include <pipewire/pipewire.h>
+
+struct SDL_PrivateAudioData
+{
+    struct pw_thread_loop *loop;
+    struct pw_stream *stream;
+    struct pw_context *context;
+
+    Sint32 stride; // Bytes-per-frame
+    int stream_init_status;
+
+    // Set in GetDeviceBuf, filled in AudioThreadIterate, queued in PlayDevice
+    struct pw_buffer *pw_buf;
+};
+
+#endif // SDL_pipewire_h_

vendor/sdl-3.0.0/src/audio/ps2/SDL_ps2audio.c

@@ -0,0 +1,159 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "../SDL_sysaudio.h"
+#include "SDL_ps2audio.h"
+
+#include <kernel.h>
+#include <audsrv.h>
+#include <ps2_audio_driver.h>
+
+static int PS2AUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // These are the native supported audio PS2 configs
+    switch (device->spec.freq) {
+    case 11025:
+    case 12000:
+    case 22050:
+    case 24000:
+    case 32000:
+    case 44100:
+    case 48000:
+        break;  // acceptable value, keep it
+    default:
+        device->spec.freq = 48000;
+        break;
+    }
+
+    device->sample_frames = 512;
+    device->spec.channels = device->spec.channels == 1 ? 1 : 2;
+    device->spec.format = device->spec.format == SDL_AUDIO_S8 ? SDL_AUDIO_S8 : SDL_AUDIO_S16;
+
+    struct audsrv_fmt_t format;
+    format.bits = device->spec.format == SDL_AUDIO_S8 ? 8 : 16;
+    format.freq = device->spec.freq;
+    format.channels = device->spec.channels;
+
+    device->hidden->channel = audsrv_set_format(&format);
+    audsrv_set_volume(MAX_VOLUME);
+
+    if (device->hidden->channel < 0) {
+        return SDL_SetError("Couldn't reserve hardware channel");
+    }
+
+    // Update the fragment size as size in bytes.
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    /* Allocate the mixing buffer.  Its size and starting address must
+       be a multiple of 64 bytes.  Our sample count is already a multiple of
+       64, so spec->size should be a multiple of 64 as well. */
+    const int mixlen = device->buffer_size * NUM_BUFFERS;
+    device->hidden->rawbuf = (Uint8 *)SDL_aligned_alloc(64, mixlen);
+    if (device->hidden->rawbuf == NULL) {
+        return SDL_SetError("Couldn't allocate mixing buffer");
+    }
+
+    SDL_memset(device->hidden->rawbuf, device->silence_value, mixlen);
+    for (int i = 0; i < NUM_BUFFERS; i++) {
+        device->hidden->mixbufs[i] = &device->hidden->rawbuf[i * device->buffer_size];
+    }
+
+    return 0;
+}
+
+static int PS2AUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    // this returns number of bytes accepted or a negative error. We assume anything other than buflen is a fatal error.
+    return (audsrv_play_audio((char *)buffer, buflen) != buflen) ? -1 : 0;
+}
+
+static int PS2AUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    audsrv_wait_audio(device->buffer_size);
+    return 0;
+}
+
+static Uint8 *PS2AUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    Uint8 *buffer = device->hidden->mixbufs[device->hidden->next_buffer];
+    device->hidden->next_buffer = (device->hidden->next_buffer + 1) % NUM_BUFFERS;
+    return buffer;
+}
+
+static void PS2AUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->channel >= 0) {
+            audsrv_stop_audio();
+            device->hidden->channel = -1;
+        }
+
+        if (device->hidden->rawbuf != NULL) {
+            SDL_aligned_free(device->hidden->rawbuf);
+            device->hidden->rawbuf = NULL;
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static void PS2AUDIO_ThreadInit(SDL_AudioDevice *device)
+{
+    /* Increase the priority of this audio thread by 1 to put it
+       ahead of other SDL threads. */
+    const int32_t thid = GetThreadId();
+    ee_thread_status_t status;
+    if (ReferThreadStatus(thid, &status) == 0) {
+        ChangeThreadPriority(thid, status.current_priority - 1);
+    }
+}
+
+static void PS2AUDIO_Deinitialize(void)
+{
+    deinit_audio_driver();
+}
+
+static SDL_bool PS2AUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    if (init_audio_driver() < 0) {
+        return SDL_FALSE;
+    }
+
+    impl->OpenDevice = PS2AUDIO_OpenDevice;
+    impl->PlayDevice = PS2AUDIO_PlayDevice;
+    impl->WaitDevice = PS2AUDIO_WaitDevice;
+    impl->GetDeviceBuf = PS2AUDIO_GetDeviceBuf;
+    impl->CloseDevice = PS2AUDIO_CloseDevice;
+    impl->ThreadInit = PS2AUDIO_ThreadInit;
+    impl->Deinitialize = PS2AUDIO_Deinitialize;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    return SDL_TRUE; // this audio target is available.
+}
+
+AudioBootStrap PS2AUDIO_bootstrap = {
+    "ps2", "PS2 audio driver", PS2AUDIO_Init, SDL_FALSE
+};

vendor/sdl-3.0.0/src/audio/ps2/SDL_ps2audio.h

@@ -0,0 +1,42 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_ps2audio_h_
+#define SDL_ps2audio_h_
+
+#include "../SDL_sysaudio.h"
+
+#define NUM_BUFFERS 2
+
+struct SDL_PrivateAudioData
+{
+    // The hardware output channel.
+    int channel;
+    // The raw allocated mixing buffer.
+    Uint8 *rawbuf;
+    // Individual mixing buffers.
+    Uint8 *mixbufs[NUM_BUFFERS];
+    // Index of the next available mixing buffer.
+    int next_buffer;
+};
+
+#endif // SDL_ps2audio_h_

vendor/sdl-3.0.0/src/audio/psp/SDL_pspaudio.c

@@ -0,0 +1,183 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_PSP
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "../SDL_audiodev_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_pspaudio.h"
+
+#include <pspaudio.h>
+#include <pspthreadman.h>
+
+static inline SDL_bool isBasicAudioConfig(const SDL_AudioSpec *spec)
+{
+    return spec->freq == 44100;
+}
+
+static int PSPAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // device only natively supports S16LSB
+    device->spec.format = SDL_AUDIO_S16LE;
+
+    /*  PSP has some limitations with the Audio. It fully supports 44.1KHz (Mono & Stereo),
+        however with frequencies different than 44.1KHz, it just supports Stereo,
+        so a resampler must be done for these scenarios */
+    if (isBasicAudioConfig(&device->spec)) {
+        // The sample count must be a multiple of 64.
+        device->sample_frames = PSP_AUDIO_SAMPLE_ALIGN(device->sample_frames);
+        // The number of channels (1 or 2).
+        device->spec.channels = device->spec.channels == 1 ? 1 : 2;
+        const int format = (device->spec.channels == 1) ? PSP_AUDIO_FORMAT_MONO : PSP_AUDIO_FORMAT_STEREO;
+        device->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, device->sample_frames, format);
+    } else {
+        // 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11050, 8000
+        switch (device->spec.freq) {
+        case 8000:
+        case 11025:
+        case 12000:
+        case 16000:
+        case 22050:
+        case 24000:
+        case 32000:
+        case 44100:
+        case 48000:
+            break;  // acceptable, keep it
+        default:
+            device->spec.freq = 48000;
+            break;
+        }
+        // The number of samples to output in one output call (min 17, max 4111).
+        device->sample_frames = device->sample_frames < 17 ? 17 : (device->sample_frames > 4111 ? 4111 : device->sample_frames);
+        device->spec.channels = 2; // we're forcing the hardware to stereo.
+        device->hidden->channel = sceAudioSRCChReserve(device->sample_frames, device->spec.freq, 2);
+    }
+
+    if (device->hidden->channel < 0) {
+        return SDL_SetError("Couldn't reserve hardware channel");
+    }
+
+    // Update the fragment size as size in bytes.
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    /* Allocate the mixing buffer.  Its size and starting address must
+       be a multiple of 64 bytes.  Our sample count is already a multiple of
+       64, so spec->size should be a multiple of 64 as well. */
+    const int mixlen = device->buffer_size * NUM_BUFFERS;
+    device->hidden->rawbuf = (Uint8 *)SDL_aligned_alloc(64, mixlen);
+    if (device->hidden->rawbuf == NULL) {
+        return SDL_SetError("Couldn't allocate mixing buffer");
+    }
+
+    SDL_memset(device->hidden->rawbuf, device->silence_value, mixlen);
+    for (int i = 0; i < NUM_BUFFERS; i++) {
+        device->hidden->mixbufs[i] = &device->hidden->rawbuf[i * device->buffer_size];
+    }
+
+    return 0;
+}
+
+static int PSPAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    int rc;
+    if (!isBasicAudioConfig(&device->spec)) {
+        SDL_assert(device->spec.channels == 2);
+        rc = sceAudioSRCOutputBlocking(PSP_AUDIO_VOLUME_MAX, (void *) buffer);
+    } else {
+        rc = sceAudioOutputPannedBlocking(device->hidden->channel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, (void *) buffer);
+    }
+    return (rc == 0) ? 0 : -1;
+}
+
+static int PSPAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    return 0;  // Because we block when sending audio, there's no need for this function to do anything.
+}
+
+static Uint8 *PSPAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    Uint8 *buffer = device->hidden->mixbufs[device->hidden->next_buffer];
+    device->hidden->next_buffer = (device->hidden->next_buffer + 1) % NUM_BUFFERS;
+    return buffer;
+}
+
+static void PSPAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->channel >= 0) {
+            if (!isBasicAudioConfig(&device->spec)) {
+                sceAudioSRCChRelease();
+            } else {
+                sceAudioChRelease(device->hidden->channel);
+            }
+            device->hidden->channel = -1;
+        }
+
+        if (device->hidden->rawbuf != NULL) {
+            SDL_aligned_free(device->hidden->rawbuf);
+            device->hidden->rawbuf = NULL;
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static void PSPAUDIO_ThreadInit(SDL_AudioDevice *device)
+{
+    /* Increase the priority of this audio thread by 1 to put it
+       ahead of other SDL threads. */
+    const SceUID thid = sceKernelGetThreadId();
+    SceKernelThreadInfo status;
+    status.size = sizeof(SceKernelThreadInfo);
+    if (sceKernelReferThreadStatus(thid, &status) == 0) {
+        sceKernelChangeThreadPriority(thid, status.currentPriority - 1);
+    }
+}
+
+static SDL_bool PSPAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = PSPAUDIO_OpenDevice;
+    impl->PlayDevice = PSPAUDIO_PlayDevice;
+    impl->WaitDevice = PSPAUDIO_WaitDevice;
+    impl->GetDeviceBuf = PSPAUDIO_GetDeviceBuf;
+    impl->CloseDevice = PSPAUDIO_CloseDevice;
+    impl->ThreadInit = PSPAUDIO_ThreadInit;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    //impl->HasCaptureSupport = SDL_TRUE;
+    //impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+    return SDL_TRUE;
+}
+
+AudioBootStrap PSPAUDIO_bootstrap = {
+    "psp", "PSP audio driver", PSPAUDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_PSP

vendor/sdl-3.0.0/src/audio/psp/SDL_pspaudio.h

@@ -0,0 +1,41 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_pspaudio_h_
+#define SDL_pspaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+#define NUM_BUFFERS 2
+
+struct SDL_PrivateAudioData
+{
+    // The hardware output channel.
+    int channel;
+    // The raw allocated mixing buffer.
+    Uint8 *rawbuf;
+    // Individual mixing buffers.
+    Uint8 *mixbufs[NUM_BUFFERS];
+    // Index of the next available mixing buffer.
+    int next_buffer;
+};
+
+#endif // SDL_pspaudio_h_

vendor/sdl-3.0.0/src/audio/pulseaudio/SDL_pulseaudio.h

@@ -0,0 +1,44 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_pulseaudio_h_
+#define SDL_pulseaudio_h_
+
+#include <pulse/pulseaudio.h>
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // pulseaudio structures
+    pa_stream *stream;
+
+    // Raw mixing buffer
+    Uint8 *mixbuf;
+
+    int bytes_requested; // bytes of data the hardware wants _now_.
+
+    const Uint8 *capturebuf;
+    int capturelen;
+};
+
+#endif // SDL_pulseaudio_h_

vendor/sdl-3.0.0/src/audio/qnx/SDL_qsa_audio.c

@@ -0,0 +1,450 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+// !!! FIXME: can this target support hotplugging?
+
+#include "../../SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_QNX
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sched.h>
+#include <sys/select.h>
+#include <sys/neutrino.h>
+#include <sys/asoundlib.h>
+
+#include "SDL3/SDL_timer.h"
+#include "SDL3/SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_qsa_audio.h"
+
+// default channel communication parameters
+#define DEFAULT_CPARAMS_RATE   44100
+#define DEFAULT_CPARAMS_VOICES 1
+
+#define DEFAULT_CPARAMS_FRAG_SIZE 4096
+#define DEFAULT_CPARAMS_FRAGS_MIN 1
+#define DEFAULT_CPARAMS_FRAGS_MAX 1
+
+#define QSA_MAX_NAME_LENGTH   81+16     // Hardcoded in QSA, can't be changed
+
+static int QSA_SetError(const char *fn, int status)
+{
+    return SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status));
+}
+
+// !!! FIXME: does this need to be here? Does the SDL version not work?
+static void QSA_ThreadInit(SDL_AudioDevice *device)
+{
+    // Increase default 10 priority to 25 to avoid jerky sound
+    struct sched_param param;
+    if (SchedGet(0, 0, &param) != -1) {
+        param.sched_priority = param.sched_curpriority + 15;
+        SchedSet(0, 0, SCHED_NOCHANGE, &param);
+    }
+}
+
+// PCM channel parameters initialize function
+static void QSA_InitAudioParams(snd_pcm_channel_params_t * cpars)
+{
+    SDL_zerop(cpars);
+    cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
+    cpars->mode = SND_PCM_MODE_BLOCK;
+    cpars->start_mode = SND_PCM_START_DATA;
+    cpars->stop_mode = SND_PCM_STOP_STOP;
+    cpars->format.format = SND_PCM_SFMT_S16_LE;
+    cpars->format.interleave = 1;
+    cpars->format.rate = DEFAULT_CPARAMS_RATE;
+    cpars->format.voices = DEFAULT_CPARAMS_VOICES;
+    cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
+    cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
+    cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
+}
+
+// This function waits until it is possible to write a full sound buffer
+static int QSA_WaitDevice(SDL_AudioDevice *device)
+{
+    // Setup timeout for playing one fragment equal to 2 seconds
+    // If timeout occurred than something wrong with hardware or driver
+    // For example, Vortex 8820 audio driver stucks on second DAC because
+    // it doesn't exist !
+    const int result = SDL_IOReady(device->hidden->audio_fd,
+                                   device->iscapture ? SDL_IOR_READ : SDL_IOR_WRITE,
+                                   2 * 1000);
+    switch (result) {
+    case -1:
+        SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "QSA: SDL_IOReady() failed: %s", strerror(errno));
+        return -1;
+    case 0:
+        device->hidden->timeout_on_wait = SDL_TRUE;  // !!! FIXME: Should we just disconnect the device in this case?
+        break;
+    default:
+        device->hidden->timeout_on_wait = SDL_FALSE;
+        break;
+    }
+
+    return 0;
+}
+
+static int QSA_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    if (SDL_AtomicGet(&device->shutdown) || !device->hidden) {
+        return 0;
+    }
+
+    int towrite = buflen;
+
+    // Write the audio data, checking for EAGAIN (buffer full) and underrun
+    while ((towrite > 0) && !SDL_AtomicGet(&device->shutdown));
+        const int bw = snd_pcm_plugin_write(device->hidden->audio_handle, buffer, towrite);
+        if (bw != towrite) {
+            // Check if samples playback got stuck somewhere in hardware or in the audio device driver
+            if ((errno == EAGAIN) && (bw == 0)) {
+                if (device->hidden->timeout_on_wait) {
+                    return 0;  // oh well, try again next time.  !!! FIXME: Should we just disconnect the device in this case?
+                }
+            }
+
+            // Check for errors or conditions
+            if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
+                SDL_Delay(1);  // Let a little CPU time go by and try to write again
+
+                // if we wrote some data
+                towrite -= bw;
+                buffer += bw * device->spec.channels;
+                continue;
+            } else if ((errno == EINVAL) || (errno == EIO)) {
+                snd_pcm_channel_status_t cstatus;
+                SDL_zero(cstatus);
+                cstatus.channel = device->iscapture ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+
+                int status = snd_pcm_plugin_status(device->hidden->audio_handle, &cstatus);
+                if (status < 0) {
+                    QSA_SetError("snd_pcm_plugin_status", status);
+                    return -1;
+                } else if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY)) {
+                    status = snd_pcm_plugin_prepare(device->hidden->audio_handle, device->iscapture ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK);
+                    if (status < 0) {
+                        QSA_SetError("snd_pcm_plugin_prepare", status);
+                        return -1;
+                    }
+                }
+                continue;
+            } else {
+                return -1;
+            }
+        } else {
+            // we wrote all remaining data
+            towrite -= bw;
+            buffer += bw * device->spec.channels;
+        }
+    }
+
+    // If we couldn't write, assume fatal error for now
+    return (towrite != 0) ? -1 : 0;
+}
+
+static Uint8 *QSA_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->pcm_buf;
+}
+
+static void QSA_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_handle != NULL) {
+            #if _NTO_VERSION < 710
+            // Finish playing available samples or cancel unread samples during capture
+            snd_pcm_plugin_flush(device->hidden->audio_handle, device->iscapture ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK);
+            #endif
+            snd_pcm_close(device->hidden->audio_handle);
+        }
+
+        SDL_free(device->hidden->pcm_buf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int QSA_OpenDevice(SDL_AudioDevice *device)
+{
+    if (device->iscapture) {
+        return SDL_SetError("SDL capture support isn't available on QNX atm"); // !!! FIXME: most of this code has support for capture devices, but there's no CaptureFromDevice, etc functions. Fill them in!
+    }
+
+    SDL_assert(device->handle != NULL);  // NULL used to mean "system default device" in SDL2; it does not mean that in SDL3.
+    const Uint32 sdlhandle = (Uint32) ((size_t) device->handle);
+    const uint32_t cardno = (uint32_t) (sdlhandle & 0xFFFF);
+    const uint32_t deviceno = (uint32_t) ((sdlhandle >> 16) & 0xFFFF);
+    const SDL_bool iscapture = device->iscapture;
+    int status = 0;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof (struct SDL_PrivateAudioData)));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // Initialize channel transfer parameters to default
+    snd_pcm_channel_params_t cparams;
+    QSA_InitAudioParams(&cparams);
+
+    // Open requested audio device
+    status = snd_pcm_open(&device->hidden->audio_handle, cardno, deviceno, iscapture ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
+    if (status < 0) {
+        device->hidden->audio_handle = NULL;
+        return QSA_SetError("snd_pcm_open", status);
+    }
+
+    // Try for a closest match on audio format
+    SDL_AudioFormat test_format = 0;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        // if match found set format to equivalent QSA format
+        switch (test_format) {
+        #define CHECKFMT(sdlfmt, qsafmt) case SDL_AUDIO_##sdlfmt: cparams.format.format = SND_PCM_SFMT_##qsafmt; break
+        CHECKFMT(U8, U8);
+        CHECKFMT(S8, S8);
+        CHECKFMT(S16LSB, S16_LE);
+        CHECKFMT(S16MSB, S16_BE);
+        CHECKFMT(S32LSB, S32_LE);
+        CHECKFMT(S32MSB, S32_BE);
+        CHECKFMT(F32LSB, FLOAT_LE);
+        CHECKFMT(F32MSB, FLOAT_BE);
+        #undef CHECKFMT
+        default: continue;
+        }
+        break;
+    }
+
+    // assumes test_format not 0 on success
+    if (test_format == 0) {
+        return SDL_SetError("QSA: Couldn't find any hardware audio formats");
+    }
+
+    device->spec.format = test_format;
+
+    // Set mono/stereo/4ch/6ch/8ch audio
+    cparams.format.voices = device->spec.channels;
+
+    // Set rate
+    cparams.format.rate = device->spec.freq;
+
+    // Setup the transfer parameters according to cparams
+    status = snd_pcm_plugin_params(device->hidden->audio_handle, &cparams);
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_params", status);
+    }
+
+    // Make sure channel is setup right one last time
+    snd_pcm_channel_setup_t csetup;
+    SDL_zero(csetup);
+    csetup.channel = iscapture ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+    if (snd_pcm_plugin_setup(device->hidden->audio_handle, &csetup) < 0) {
+        return SDL_SetError("QSA: Unable to setup channel");
+    }
+
+    device->sample_frames = csetup.buf.block.frag_size;
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    device->hidden->pcm_buf = (Uint8 *) SDL_malloc(device->buffer_size);
+    if (device->hidden->pcm_buf == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(device->hidden->pcm_buf, device->silence_value, device->buffer_size);
+
+    // get the file descriptor
+    device->hidden->audio_fd = snd_pcm_file_descriptor(device->hidden->audio_handle, csetup.channel);
+    if (device->hidden->audio_fd < 0) {
+        return QSA_SetError("snd_pcm_file_descriptor", device->hidden->audio_fd);
+    }
+
+    // Prepare an audio channel
+    status = snd_pcm_plugin_prepare(device->hidden->audio_handle, csetup.channel)
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_prepare", status);
+    }
+
+    return 0;  // We're really ready to rock and roll. :-)
+}
+
+static SDL_AudioFormat QnxFormatToSDLFormat(const int32_t qnxfmt)
+{
+    switch (qnxfmt) {
+        #define CHECKFMT(sdlfmt, qsafmt) case SND_PCM_SFMT_##qsafmt: return SDL_AUDIO_##sdlfmt
+        CHECKFMT(U8, U8);
+        CHECKFMT(S8, S8);
+        CHECKFMT(S16LSB, S16_LE);
+        CHECKFMT(S16MSB, S16_BE);
+        CHECKFMT(S32LSB, S32_LE);
+        CHECKFMT(S32MSB, S32_BE);
+        CHECKFMT(F32LSB, FLOAT_LE);
+        CHECKFMT(F32MSB, FLOAT_BE);
+        #undef CHECKFMT
+        default: break;
+    }
+    return SDL_AUDIO_S16;  // oh well.
+}
+
+static void QSA_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    // Detect amount of available devices
+    // this value can be changed in the runtime
+    int num_cards = 0;
+    (void) snd_cards_list(NULL, 0, &alloc_num_cards);
+    SDL_bool isstack = SDL_FALSE;
+    int *cards = SDL_small_alloc(int, num_cards, &isstack);
+    if (!cards) {
+        return;  // we're in trouble.
+    }
+    int overflow_cards = 0;
+    const int total_num_cards = snd_cards_list(cards, num_cards, &overflow_cards);
+    // if overflow_cards > 0 or total_num_cards > num_cards, it changed at the last moment; oh well, we lost some.
+    num_cards = SDL_min(num_cards, total_num_cards);  // ...but make sure it didn't _shrink_.
+
+    // If io-audio manager is not running we will get 0 as number of available audio devices
+    if (num_cards == 0) {   // not any available audio devices?
+        SDL_small_free(cards, isstack);
+        return;
+    }
+
+    // Find requested devices by type
+    for (int it = 0; it < num_cards; it++) {
+        const int card = cards[it];
+        for (uint32_t deviceno = 0; ; deviceno++) {
+            int32_t status;
+            char name[QSA_MAX_NAME_LENGTH];
+
+            status = snd_card_get_longname(card, name, sizeof (name));
+            if (status == EOK) {
+                snd_pcm_t *handle;
+
+                // Add device number to device name
+                char fullname[QSA_MAX_NAME_LENGTH + 32];
+                SDL_snprintf(fullname, sizeof (fullname), "%s d%d", name, (int) deviceno);
+
+                // Check if this device id could play anything
+                SDL_bool iscapture = SDL_FALSE;
+                status = snd_pcm_open(&handle, card, deviceno, SND_PCM_OPEN_PLAYBACK);
+                if (status != EOK) {  // no? See if it's a capture device instead.
+                    #if 0  // !!! FIXME: most of this code has support for capture devices, but there's no CaptureFromDevice, etc functions. Fill them in!
+                    status = snd_pcm_open(&handle, card, deviceno, SND_PCM_OPEN_CAPTURE);
+                    if (status == EOK) {
+                        iscapture = SDL_TRUE;
+                    }
+                    #endif
+                }
+
+                if (status == EOK) {
+                    SDL_AudioSpec spec;
+                    SDL_AudioSpec *pspec = &spec;
+                    snd_pcm_channel_setup_t csetup;
+                    SDL_zero(csetup);
+                    csetup.channel = iscapture ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+
+                    if (snd_pcm_plugin_setup(device->hidden->audio_handle, &csetup) < 0) {
+                        pspec = NULL;  // go on without spec info.
+                    } else {
+                        spec.format = QnxFormatToSDLFormat(csetup.format.format);
+                        spec.channels = csetup.format.channels;
+                        spec.freq = csetup.format.rate;
+                    }
+
+                    status = snd_pcm_close(handle);
+                    if (status == EOK) {
+                        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+                        SDL_assert(card <= 0xFFFF);
+                        SDL_assert(deviceno <= 0xFFFF);
+                        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+                        SDL_AddAudioDevice(iscapture, fullname, pspec, (void *) ((size_t) sdlhandle));
+                    }
+                } else {
+                    // Check if we got end of devices list
+                    if (status == -ENOENT) {
+                        break;
+                    }
+                }
+            } else {
+                break;
+            }
+        }
+    }
+
+    SDL_small_free(cards, isstack);
+
+    // Try to open the "preferred" devices, which will tell us the card/device pairs for the default devices.
+    snd_pcm_t handle;
+    int cardno, deviceno;
+    if (snd_pcm_open_preferred(&handle, &cardno, &deviceno, SND_PCM_OPEN_PLAYBACK) == 0) {
+        snd_pcm_close(handle);
+        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+        SDL_assert(cardno <= 0xFFFF);
+        SDL_assert(deviceno <= 0xFFFF);
+        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+        *default_output = SDL_FindPhysicalAudioDeviceByHandle((void *) ((size_t) sdlhandle));
+    }
+
+    if (snd_pcm_open_preferred(&handle, &cardno, &deviceno, SND_PCM_OPEN_CAPTURE) == 0) {
+        snd_pcm_close(handle);
+        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+        SDL_assert(cardno <= 0xFFFF);
+        SDL_assert(deviceno <= 0xFFFF);
+        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+        *default_capture = SDL_FindPhysicalAudioDeviceByHandle((void *) ((size_t) sdlhandle));
+    }
+}
+
+static void QSA_Deinitialize(void)
+{
+    // nothing to do here atm.
+}
+
+static SDL_bool QSA_Init(SDL_AudioDriverImpl * impl)
+{
+    impl->DetectDevices = QSA_DetectDevices;
+    impl->OpenDevice = QSA_OpenDevice;
+    impl->ThreadInit = QSA_ThreadInit;
+    impl->WaitDevice = QSA_WaitDevice;
+    impl->PlayDevice = QSA_PlayDevice;
+    impl->GetDeviceBuf = QSA_GetDeviceBuf;
+    impl->CloseDevice = QSA_CloseDevice;
+    impl->Deinitialize = QSA_Deinitialize;
+
+    // !!! FIXME: most of this code has support for capture devices, but there's no CaptureFromDevice, etc functions. Fill them in!
+    //impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap QSAAUDIO_bootstrap = {
+    "qsa", "QNX QSA Audio", QSA_Init, 0
+};
+
+#endif // SDL_AUDIO_DRIVER_QNX
+

vendor/sdl-3.0.0/src/audio/qnx/SDL_qsa_audio.h

@@ -0,0 +1,40 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#ifndef __SDL_QSA_AUDIO_H__
+#define __SDL_QSA_AUDIO_H__
+
+#include <sys/asoundlib.h>
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    snd_pcm_t *audio_handle;  // The audio device handle
+    int audio_fd;  // The audio file descriptor, for selecting on
+    SDL_bool timeout_on_wait; // Select timeout status
+    Uint8 *pcm_buf;  // Raw mixing buffer
+};
+
+#endif // __SDL_QSA_AUDIO_H__
+

vendor/sdl-3.0.0/src/audio/sndio/SDL_sndioaudio.c

@@ -0,0 +1,359 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO
+
+// OpenBSD sndio target
+
+#ifdef HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
+#include <poll.h>
+#include <unistd.h>
+
+#include "../SDL_sysaudio.h"
+#include "SDL_sndioaudio.h"
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+#endif
+
+#ifndef INFTIM
+#define INFTIM -1
+#endif
+
+#ifndef SIO_DEVANY
+#define SIO_DEVANY "default"
+#endif
+
+static struct sio_hdl *(*SNDIO_sio_open)(const char *, unsigned int, int);
+static void (*SNDIO_sio_close)(struct sio_hdl *);
+static int (*SNDIO_sio_setpar)(struct sio_hdl *, struct sio_par *);
+static int (*SNDIO_sio_getpar)(struct sio_hdl *, struct sio_par *);
+static int (*SNDIO_sio_start)(struct sio_hdl *);
+static int (*SNDIO_sio_stop)(struct sio_hdl *);
+static size_t (*SNDIO_sio_read)(struct sio_hdl *, void *, size_t);
+static size_t (*SNDIO_sio_write)(struct sio_hdl *, const void *, size_t);
+static int (*SNDIO_sio_nfds)(struct sio_hdl *);
+static int (*SNDIO_sio_pollfd)(struct sio_hdl *, struct pollfd *, int);
+static int (*SNDIO_sio_revents)(struct sio_hdl *, struct pollfd *);
+static int (*SNDIO_sio_eof)(struct sio_hdl *);
+static void (*SNDIO_sio_initpar)(struct sio_par *);
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+static const char *sndio_library = SDL_AUDIO_DRIVER_SNDIO_DYNAMIC;
+static void *sndio_handle = NULL;
+
+static int load_sndio_sym(const char *fn, void **addr)
+{
+    *addr = SDL_LoadFunction(sndio_handle, fn);
+    if (*addr == NULL) {
+        return 0;  // Don't call SDL_SetError(): SDL_LoadFunction already did.
+    }
+
+    return 1;
+}
+
+// cast funcs to char* first, to please GCC's strict aliasing rules.
+#define SDL_SNDIO_SYM(x)                                  \
+    if (!load_sndio_sym(#x, (void **)(char *)&SNDIO_##x)) \
+    return -1
+#else
+#define SDL_SNDIO_SYM(x) SNDIO_##x = x
+#endif
+
+static int load_sndio_syms(void)
+{
+    SDL_SNDIO_SYM(sio_open);
+    SDL_SNDIO_SYM(sio_close);
+    SDL_SNDIO_SYM(sio_setpar);
+    SDL_SNDIO_SYM(sio_getpar);
+    SDL_SNDIO_SYM(sio_start);
+    SDL_SNDIO_SYM(sio_stop);
+    SDL_SNDIO_SYM(sio_read);
+    SDL_SNDIO_SYM(sio_write);
+    SDL_SNDIO_SYM(sio_nfds);
+    SDL_SNDIO_SYM(sio_pollfd);
+    SDL_SNDIO_SYM(sio_revents);
+    SDL_SNDIO_SYM(sio_eof);
+    SDL_SNDIO_SYM(sio_initpar);
+    return 0;
+}
+
+#undef SDL_SNDIO_SYM
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+
+static void UnloadSNDIOLibrary(void)
+{
+    if (sndio_handle != NULL) {
+        SDL_UnloadObject(sndio_handle);
+        sndio_handle = NULL;
+    }
+}
+
+static int LoadSNDIOLibrary(void)
+{
+    int retval = 0;
+    if (sndio_handle == NULL) {
+        sndio_handle = SDL_LoadObject(sndio_library);
+        if (sndio_handle == NULL) {
+            retval = -1;  // Don't call SDL_SetError(): SDL_LoadObject already did.
+        } else {
+            retval = load_sndio_syms();
+            if (retval < 0) {
+                UnloadSNDIOLibrary();
+            }
+        }
+    }
+    return retval;
+}
+
+#else
+
+static void UnloadSNDIOLibrary(void)
+{
+}
+
+static int LoadSNDIOLibrary(void)
+{
+    load_sndio_syms();
+    return 0;
+}
+
+#endif // SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+
+static int SNDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    const SDL_bool iscapture = device->iscapture;
+
+    while (!SDL_AtomicGet(&device->shutdown)) {
+        if (SNDIO_sio_eof(device->hidden->dev)) {
+            return -1;
+        }
+
+        const int nfds = SNDIO_sio_pollfd(device->hidden->dev, device->hidden->pfd, iscapture ? POLLIN : POLLOUT);
+        if (nfds <= 0 || poll(device->hidden->pfd, nfds, 10) < 0) {
+            return -1;
+        }
+
+        const int revents = SNDIO_sio_revents(device->hidden->dev, device->hidden->pfd);
+        if (iscapture && (revents & POLLIN)) {
+            break;
+        } else if (!iscapture && (revents & POLLOUT)) {
+            break;
+        } else if (revents & POLLHUP) {
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+static int SNDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    // !!! FIXME: this should be non-blocking so we can check device->shutdown.
+    // this is set to blocking, because we _have_ to send the entire buffer down, but hopefully WaitDevice took most of the delay time.
+    if (SNDIO_sio_write(device->hidden->dev, buffer, buflen) != buflen) {
+        return -1;  // If we couldn't write, assume fatal error for now
+    }
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+    return 0;
+}
+
+static int SNDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    // We set capture devices non-blocking; this can safely return 0 in SDL3, but we'll check for EOF to cause a device disconnect.
+    const size_t br = SNDIO_sio_read(device->hidden->dev, buffer, buflen);
+    if ((br == 0) && SNDIO_sio_eof(device->hidden->dev)) {
+        return -1;
+    }
+    return (int) br;
+}
+
+static void SNDIO_FlushCapture(SDL_AudioDevice *device)
+{
+    char buf[512];
+    while (!SDL_AtomicGet(&device->shutdown) && (SNDIO_sio_read(device->hidden->dev, buf, sizeof(buf)) > 0)) {
+        // do nothing
+    }
+}
+
+static Uint8 *SNDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static void SNDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->dev != NULL) {
+            SNDIO_sio_stop(device->hidden->dev);
+            SNDIO_sio_close(device->hidden->dev);
+        }
+        SDL_free(device->hidden->pfd);
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int SNDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    // !!! FIXME: we really should standardize this on a specific SDL hint.
+    const char *audiodev = SDL_getenv("AUDIODEV");
+
+    // Capture devices must be non-blocking for SNDIO_FlushCapture
+    device->hidden->dev = SNDIO_sio_open(audiodev != NULL ? audiodev : SIO_DEVANY,
+                                         device->iscapture ? SIO_REC : SIO_PLAY, device->iscapture);
+    if (device->hidden->dev == NULL) {
+        return SDL_SetError("sio_open() failed");
+    }
+
+    device->hidden->pfd = SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(device->hidden->dev));
+    if (device->hidden->pfd == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    struct sio_par par;
+    SNDIO_sio_initpar(&par);
+
+    par.rate = device->spec.freq;
+    par.pchan = device->spec.channels;
+    par.round = device->sample_frames;
+    par.appbufsz = par.round * 2;
+
+    // Try for a closest match on audio format
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if (!SDL_AUDIO_ISFLOAT(test_format)) {
+            par.le = SDL_AUDIO_ISLITTLEENDIAN(test_format) ? 1 : 0;
+            par.sig = SDL_AUDIO_ISSIGNED(test_format) ? 1 : 0;
+            par.bits = SDL_AUDIO_BITSIZE(test_format);
+
+            if (SNDIO_sio_setpar(device->hidden->dev, &par) == 0) {
+                continue;
+            }
+            if (SNDIO_sio_getpar(device->hidden->dev, &par) == 0) {
+                return SDL_SetError("sio_getpar() failed");
+            }
+            if (par.bps != SIO_BPS(par.bits)) {
+                continue;
+            }
+            if ((par.bits == 8 * par.bps) || (par.msb)) {
+                break;
+            }
+        }
+    }
+
+    if (!test_format) {
+        return SDL_SetError("sndio: Unsupported audio format");
+    }
+
+    if ((par.bps == 4) && (par.sig) && (par.le)) {
+        device->spec.format = SDL_AUDIO_S32LE;
+    } else if ((par.bps == 4) && (par.sig) && (!par.le)) {
+        device->spec.format = SDL_AUDIO_S32BE;
+    } else if ((par.bps == 2) && (par.sig) && (par.le)) {
+        device->spec.format = SDL_AUDIO_S16LE;
+    } else if ((par.bps == 2) && (par.sig) && (!par.le)) {
+        device->spec.format = SDL_AUDIO_S16BE;
+    } else if ((par.bps == 1) && (par.sig)) {
+        device->spec.format = SDL_AUDIO_S8;
+    } else if ((par.bps == 1) && (!par.sig)) {
+        device->spec.format = SDL_AUDIO_U8;
+    } else {
+        return SDL_SetError("sndio: Got unsupported hardware audio format.");
+    }
+
+    device->spec.freq = par.rate;
+    device->spec.channels = par.pchan;
+    device->sample_frames = par.round;
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    // Allocate mixing buffer
+    device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
+    if (device->hidden->mixbuf == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+
+    if (!SNDIO_sio_start(device->hidden->dev)) {
+        return SDL_SetError("sio_start() failed");
+    }
+
+    return 0;  // We're ready to rock and roll. :-)
+}
+
+static void SNDIO_Deinitialize(void)
+{
+    UnloadSNDIOLibrary();
+}
+
+static void SNDIO_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    *default_output = SDL_AddAudioDevice(SDL_FALSE, DEFAULT_OUTPUT_DEVNAME, NULL, (void *)0x1);
+    *default_capture = SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *)0x2);
+}
+
+static SDL_bool SNDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    if (LoadSNDIOLibrary() < 0) {
+        return SDL_FALSE;
+    }
+
+    impl->OpenDevice = SNDIO_OpenDevice;
+    impl->WaitDevice = SNDIO_WaitDevice;
+    impl->PlayDevice = SNDIO_PlayDevice;
+    impl->GetDeviceBuf = SNDIO_GetDeviceBuf;
+    impl->CloseDevice = SNDIO_CloseDevice;
+    impl->WaitCaptureDevice = SNDIO_WaitDevice;
+    impl->CaptureFromDevice = SNDIO_CaptureFromDevice;
+    impl->FlushCapture = SNDIO_FlushCapture;
+    impl->Deinitialize = SNDIO_Deinitialize;
+    impl->DetectDevices = SNDIO_DetectDevices;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap SNDIO_bootstrap = {
+    "sndio", "OpenBSD sndio", SNDIO_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_SNDIO

vendor/sdl-3.0.0/src/audio/sndio/SDL_sndioaudio.h

@@ -0,0 +1,38 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_sndioaudio_h_
+#define SDL_sndioaudio_h_
+
+#include <poll.h>
+#include <sndio.h>
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    struct sio_hdl *dev;  // The audio device handle
+    Uint8 *mixbuf; // Raw mixing buffer
+    struct pollfd *pfd;  // Polling structures for non-blocking sndio devices
+};
+
+#endif // SDL_sndioaudio_h_

vendor/sdl-3.0.0/src/audio/vita/SDL_vitaaudio.c

@@ -0,0 +1,238 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_VITA
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "../SDL_audiodev_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_vitaaudio.h"
+
+#include <psp2/kernel/threadmgr.h>
+#include <psp2/audioout.h>
+#include <psp2/audioin.h>
+
+#define SCE_AUDIO_SAMPLE_ALIGN(s) (((s) + 63) & ~63)
+#define SCE_AUDIO_MAX_VOLUME      0x8000
+
+static int VITAAUD_OpenCaptureDevice(SDL_AudioDevice *device)
+{
+    device->spec.freq = 16000;
+    device->spec.channels = 1;
+    device->sample_frames = 512;
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    device->hidden->port = sceAudioInOpenPort(SCE_AUDIO_IN_PORT_TYPE_VOICE, 512, 16000, SCE_AUDIO_IN_PARAM_FORMAT_S16_MONO);
+
+    if (device->hidden->port < 0) {
+        return SDL_SetError("Couldn't open audio in port: %x", device->hidden->port);
+    }
+
+    return 0;
+}
+
+static int VITAAUD_OpenDevice(SDL_AudioDevice *device)
+{
+    int format, mixlen, i, port = SCE_AUDIO_OUT_PORT_TYPE_MAIN;
+    int vols[2] = { SCE_AUDIO_MAX_VOLUME, SCE_AUDIO_MAX_VOLUME };
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts;
+
+    device->hidden = (struct SDL_PrivateAudioData *)
+        SDL_malloc(sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(device->hidden, 0, sizeof(*device->hidden));
+
+    closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if (test_format == SDL_AUDIO_S16LE) {
+            device->spec.format = test_format;
+            break;
+        }
+    }
+
+    if (!test_format) {
+        return SDL_SetError("Unsupported audio format");
+    }
+
+    if (device->iscapture) {
+        return VITAAUD_OpenCaptureDevice(device);
+    }
+
+    // The sample count must be a multiple of 64.
+    device->sample_frames = SCE_AUDIO_SAMPLE_ALIGN(device->sample_frames);
+
+    // Update the fragment size as size in bytes.
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    /* Allocate the mixing buffer.  Its size and starting address must
+       be a multiple of 64 bytes.  Our sample count is already a multiple of
+       64, so spec->size should be a multiple of 64 as well. */
+    mixlen = device->buffer_size * NUM_BUFFERS;
+    device->hidden->rawbuf = (Uint8 *)SDL_aligned_alloc(64, mixlen);
+    if (device->hidden->rawbuf == NULL) {
+        return SDL_SetError("Couldn't allocate mixing buffer");
+    }
+
+    // Setup the hardware channel.
+    if (device->spec.channels == 1) {
+        format = SCE_AUDIO_OUT_MODE_MONO;
+    } else {
+        format = SCE_AUDIO_OUT_MODE_STEREO;
+    }
+
+    // the main port requires 48000Hz audio, so this drops to the background music port if necessary
+    if (device->spec.freq < 48000) {
+        port = SCE_AUDIO_OUT_PORT_TYPE_BGM;
+    }
+
+    device->hidden->port = sceAudioOutOpenPort(port, device->sample_frames, device->spec.freq, format);
+    if (device->hidden->port < 0) {
+        SDL_aligned_free(device->hidden->rawbuf);
+        device->hidden->rawbuf = NULL;
+        return SDL_SetError("Couldn't open audio out port: %x", device->hidden->port);
+    }
+
+    sceAudioOutSetVolume(device->hidden->port, SCE_AUDIO_VOLUME_FLAG_L_CH | SCE_AUDIO_VOLUME_FLAG_R_CH, vols);
+
+    SDL_memset(device->hidden->rawbuf, 0, mixlen);
+    for (i = 0; i < NUM_BUFFERS; i++) {
+        device->hidden->mixbufs[i] = &device->hidden->rawbuf[i * device->buffer_size];
+    }
+
+    device->hidden->next_buffer = 0;
+    return 0;
+}
+
+static int VITAAUD_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    return (sceAudioOutOutput(device->hidden->port, buffer) == 0) ? 0 : -1;
+}
+
+// This function waits until it is possible to write a full sound buffer
+static int VITAAUD_WaitDevice(SDL_AudioDevice *device)
+{
+    // !!! FIXME: we might just need to sleep roughly as long as playback buffers take to process, based on sample rate, etc.
+    while (!SDL_AtomicGet(&device->shutdown) && (sceAudioOutGetRestSample(device->hidden->port) >= device->buffer_size)) {
+        SDL_Delay(1);
+    }
+    return 0;
+}
+
+static Uint8 *VITAAUD_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    Uint8 *retval = device->hidden->mixbufs[device->hidden->next_buffer];
+    device->hidden->next_buffer = (device->hidden->next_buffer + 1) % NUM_BUFFERS;
+    return retval;
+}
+
+static void VITAAUD_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->port >= 0) {
+            if (device->iscapture) {
+                sceAudioInReleasePort(device->hidden->port);
+            } else {
+                sceAudioOutReleasePort(device->hidden->port);
+            }
+            device->hidden->port = -1;
+        }
+
+        if (!device->iscapture && device->hidden->rawbuf != NULL) {
+            SDL_aligned_free(device->hidden->rawbuf); // this uses SDL_aligned_alloc(), not SDL_malloc()
+            device->hidden->rawbuf = NULL;
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int VITAAUD_WaitCaptureDevice(SDL_AudioDevice *device)
+{
+    // there's only a blocking call to obtain more data, so we'll just sleep as
+    //  long as a buffer would run.
+    const Uint64 endticks = SDL_GetTicks() + ((device->sample_frames * 1000) / device->spec.freq);
+    while (!SDL_AtomicGet(&device->shutdown) && (SDL_GetTicks() < endticks)) {
+        SDL_Delay(1);
+    }
+    return 0;
+}
+
+static int VITAAUD_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    int ret;
+    SDL_assert(buflen == device->buffer_size);
+    ret = sceAudioInInput(device->hidden->port, buffer);
+    if (ret < 0) {
+        return SDL_SetError("Failed to capture from device: %x", ret);
+    }
+    return device->buffer_size;
+}
+
+static void VITAAUD_FlushCapture(SDL_AudioDevice *device)
+{
+    // just grab the latest and dump it.
+    sceAudioInInput(device->hidden->port, device->work_buffer);
+}
+
+static void VITAAUD_ThreadInit(SDL_AudioDevice *device)
+{
+    // Increase the priority of this audio thread by 1 to put it ahead of other SDL threads.
+    SceUID thid;
+    SceKernelThreadInfo info;
+    thid = sceKernelGetThreadId();
+    info.size = sizeof(SceKernelThreadInfo);
+    if (sceKernelGetThreadInfo(thid, &info) == 0) {
+        sceKernelChangeThreadPriority(thid, info.currentPriority - 1);
+    }
+}
+
+static SDL_bool VITAAUD_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = VITAAUD_OpenDevice;
+    impl->PlayDevice = VITAAUD_PlayDevice;
+    impl->WaitDevice = VITAAUD_WaitDevice;
+    impl->GetDeviceBuf = VITAAUD_GetDeviceBuf;
+    impl->CloseDevice = VITAAUD_CloseDevice;
+    impl->ThreadInit = VITAAUD_ThreadInit;
+    impl->WaitCaptureDevice = VITAAUD_WaitCaptureDevice;
+    impl->FlushCapture = VITAAUD_FlushCapture;
+    impl->CaptureFromDevice = VITAAUD_CaptureFromDevice;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap VITAAUD_bootstrap = {
+    "vita", "VITA audio driver", VITAAUD_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_VITA

vendor/sdl-3.0.0/src/audio/vita/SDL_vitaaudio.h

@@ -0,0 +1,41 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_vitaaudio_h
+#define SDL_vitaaudio_h
+
+#include "../SDL_sysaudio.h"
+
+#define NUM_BUFFERS 2
+
+struct SDL_PrivateAudioData
+{
+    // The hardware input/output port.
+    int port;
+    // The raw allocated mixing buffer.
+    Uint8 *rawbuf;
+    // Individual mixing buffers.
+    Uint8 *mixbufs[NUM_BUFFERS];
+    // Index of the next available mixing buffer.
+    int next_buffer;
+};
+
+#endif // SDL_vitaaudio_h

vendor/sdl-3.0.0/src/audio/wasapi/SDL_wasapi.c

@@ -0,0 +1,765 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_WASAPI
+
+#include "../../core/windows/SDL_windows.h"
+#include "../../core/windows/SDL_immdevice.h"
+#include "../../thread/SDL_systhread.h"
+#include "../SDL_sysaudio.h"
+
+#define COBJMACROS
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+// These constants aren't available in older SDKs
+#ifndef AUDCLNT_STREAMFLAGS_RATEADJUST
+#define AUDCLNT_STREAMFLAGS_RATEADJUST 0x00100000
+#endif
+#ifndef AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY
+#define AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY 0x08000000
+#endif
+#ifndef AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
+#define AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM 0x80000000
+#endif
+
+// Some GUIDs we need to know without linking to libraries that aren't available before Vista.
+static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483, { 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
+static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0, { 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
+
+
+// WASAPI is _really_ particular about various things happening on the same thread, for COM and such,
+//  so we proxy various stuff to a single background thread to manage.
+
+typedef struct ManagementThreadPendingTask
+{
+    ManagementThreadTask fn;
+    void *userdata;
+    int result;
+    SDL_Semaphore *task_complete_sem;
+    char *errorstr;
+    struct ManagementThreadPendingTask *next;
+} ManagementThreadPendingTask;
+
+static SDL_Thread *ManagementThread = NULL;
+static ManagementThreadPendingTask *ManagementThreadPendingTasks = NULL;
+static SDL_Mutex *ManagementThreadLock = NULL;
+static SDL_Condition *ManagementThreadCondition = NULL;
+static SDL_AtomicInt ManagementThreadShutdown;
+
+static void ManagementThreadMainloop(void)
+{
+    SDL_LockMutex(ManagementThreadLock);
+    ManagementThreadPendingTask *task;
+    while (((task = SDL_AtomicGetPtr((void **) &ManagementThreadPendingTasks)) != NULL) || !SDL_AtomicGet(&ManagementThreadShutdown)) {
+        if (!task) {
+            SDL_WaitCondition(ManagementThreadCondition, ManagementThreadLock); // block until there's something to do.
+        } else {
+            SDL_AtomicSetPtr((void **) &ManagementThreadPendingTasks, task->next); // take task off the pending list.
+            SDL_UnlockMutex(ManagementThreadLock);                       // let other things add to the list while we chew on this task.
+            task->result = task->fn(task->userdata);                     // run this task.
+            if (task->task_complete_sem) {                               // something waiting on result?
+                task->errorstr = SDL_strdup(SDL_GetError());
+                SDL_PostSemaphore(task->task_complete_sem);
+            } else { // nothing waiting, we're done, free it.
+                SDL_free(task);
+            }
+            SDL_LockMutex(ManagementThreadLock); // regrab the lock so we can get the next task; if nothing to do, we'll release the lock in SDL_WaitCondition.
+        }
+    }
+    SDL_UnlockMutex(ManagementThreadLock); // told to shut down and out of tasks, let go of the lock and return.
+}
+
+int WASAPI_ProxyToManagementThread(ManagementThreadTask task, void *userdata, int *wait_on_result)
+{
+    // We want to block for a result, but we are already running from the management thread! Just run the task now so we don't deadlock.
+    if ((wait_on_result != NULL) && (SDL_ThreadID() == SDL_GetThreadID(ManagementThread))) {
+        *wait_on_result = task(userdata);
+        return 0;  // completed!
+    }
+
+    if (SDL_AtomicGet(&ManagementThreadShutdown)) {
+        return SDL_SetError("Can't add task, we're shutting down");
+    }
+
+    ManagementThreadPendingTask *pending = SDL_calloc(1, sizeof(ManagementThreadPendingTask));
+    if (!pending) {
+        return SDL_OutOfMemory();
+    }
+
+    pending->fn = task;
+    pending->userdata = userdata;
+
+    if (wait_on_result) {
+        pending->task_complete_sem = SDL_CreateSemaphore(0);
+        if (!pending->task_complete_sem) {
+            SDL_free(pending);
+            return -1;
+        }
+    }
+
+    pending->next = NULL;
+
+    SDL_LockMutex(ManagementThreadLock);
+
+    // add to end of task list.
+    ManagementThreadPendingTask *prev = NULL;
+    for (ManagementThreadPendingTask *i = SDL_AtomicGetPtr((void **) &ManagementThreadPendingTasks); i != NULL; i = i->next) {
+        prev = i;
+    }
+
+    if (prev != NULL) {
+        prev->next = pending;
+    } else {
+        SDL_AtomicSetPtr((void **) &ManagementThreadPendingTasks, pending);
+    }
+
+    // task is added to the end of the pending list, let management thread rip!
+    SDL_SignalCondition(ManagementThreadCondition);
+    SDL_UnlockMutex(ManagementThreadLock);
+
+    if (wait_on_result) {
+        SDL_WaitSemaphore(pending->task_complete_sem);
+        SDL_DestroySemaphore(pending->task_complete_sem);
+        *wait_on_result = pending->result;
+        if (pending->errorstr) {
+            SDL_SetError("%s", pending->errorstr);
+            SDL_free(pending->errorstr);
+        }
+        SDL_free(pending);
+    }
+
+    return 0; // successfully added (and possibly executed)!
+}
+
+static int ManagementThreadPrepare(void)
+{
+    if (WASAPI_PlatformInit() == -1) {
+        return -1;
+    }
+
+    ManagementThreadLock = SDL_CreateMutex();
+    if (!ManagementThreadLock) {
+        WASAPI_PlatformDeinit();
+        return -1;
+    }
+
+    ManagementThreadCondition = SDL_CreateCondition();
+    if (!ManagementThreadCondition) {
+        SDL_DestroyMutex(ManagementThreadLock);
+        ManagementThreadLock = NULL;
+        WASAPI_PlatformDeinit();
+        return -1;
+    }
+
+    return 0;
+}
+
+typedef struct
+{
+    char *errorstr;
+    SDL_Semaphore *ready_sem;
+} ManagementThreadEntryData;
+
+static int ManagementThreadEntry(void *userdata)
+{
+    ManagementThreadEntryData *data = (ManagementThreadEntryData *)userdata;
+
+    if (ManagementThreadPrepare() < 0) {
+        data->errorstr = SDL_strdup(SDL_GetError());
+        SDL_PostSemaphore(data->ready_sem); // unblock calling thread.
+        return 0;
+    }
+
+    SDL_PostSemaphore(data->ready_sem); // unblock calling thread.
+    ManagementThreadMainloop();
+
+    WASAPI_PlatformDeinit();
+    return 0;
+}
+
+static int InitManagementThread(void)
+{
+    ManagementThreadEntryData mgmtdata;
+    SDL_zero(mgmtdata);
+    mgmtdata.ready_sem = SDL_CreateSemaphore(0);
+    if (!mgmtdata.ready_sem) {
+        return -1;
+    }
+
+    SDL_AtomicSetPtr((void **) &ManagementThreadPendingTasks, NULL);
+    SDL_AtomicSet(&ManagementThreadShutdown, 0);
+    ManagementThread = SDL_CreateThreadInternal(ManagementThreadEntry, "SDLWASAPIMgmt", 256 * 1024, &mgmtdata); // !!! FIXME: maybe even smaller stack size?
+    if (!ManagementThread) {
+        return -1;
+    }
+
+    SDL_WaitSemaphore(mgmtdata.ready_sem);
+    SDL_DestroySemaphore(mgmtdata.ready_sem);
+
+    if (mgmtdata.errorstr) {
+        SDL_WaitThread(ManagementThread, NULL);
+        ManagementThread = NULL;
+        SDL_SetError("%s", mgmtdata.errorstr);
+        SDL_free(mgmtdata.errorstr);
+        return -1;
+    }
+
+    return 0;
+}
+
+static void DeinitManagementThread(void)
+{
+    if (ManagementThread) {
+        SDL_AtomicSet(&ManagementThreadShutdown, 1);
+        SDL_LockMutex(ManagementThreadLock);
+        SDL_SignalCondition(ManagementThreadCondition);
+        SDL_UnlockMutex(ManagementThreadLock);
+        SDL_WaitThread(ManagementThread, NULL);
+        ManagementThread = NULL;
+    }
+
+    SDL_assert(SDL_AtomicGetPtr((void **) &ManagementThreadPendingTasks) == NULL);
+
+    SDL_DestroyCondition(ManagementThreadCondition);
+    SDL_DestroyMutex(ManagementThreadLock);
+    ManagementThreadCondition = NULL;
+    ManagementThreadLock = NULL;
+    SDL_AtomicSet(&ManagementThreadShutdown, 0);
+}
+
+typedef struct
+{
+    SDL_AudioDevice **default_output;
+    SDL_AudioDevice **default_capture;
+} mgmtthrtask_DetectDevicesData;
+
+static int mgmtthrtask_DetectDevices(void *userdata)
+{
+    mgmtthrtask_DetectDevicesData *data = (mgmtthrtask_DetectDevicesData *)userdata;
+    WASAPI_EnumerateEndpoints(data->default_output, data->default_capture);
+    return 0;
+}
+
+static void WASAPI_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    int rc;
+    // this blocks because it needs to finish before the audio subsystem inits
+    mgmtthrtask_DetectDevicesData data = { default_output, default_capture };
+    WASAPI_ProxyToManagementThread(mgmtthrtask_DetectDevices, &data, &rc);
+}
+
+static int mgmtthrtask_DisconnectDevice(void *userdata)
+{
+    SDL_AudioDeviceDisconnected((SDL_AudioDevice *)userdata);
+    return 0;
+}
+
+void WASAPI_DisconnectDevice(SDL_AudioDevice *device)
+{
+    int rc;  // block on this; don't disconnect while holding the device lock!
+    WASAPI_ProxyToManagementThread(mgmtthrtask_DisconnectDevice, device, &rc);
+}
+
+static SDL_bool WasapiFailed(SDL_AudioDevice *device, const HRESULT err)
+{
+    if (err == S_OK) {
+        return SDL_FALSE;
+    } else if (err == AUDCLNT_E_DEVICE_INVALIDATED) {
+        device->hidden->device_lost = SDL_TRUE;
+    } else {
+        device->hidden->device_dead = SDL_TRUE;
+    }
+
+    return SDL_TRUE;
+}
+
+static int mgmtthrtask_ReleaseCaptureClient(void *userdata)
+{
+    IAudioCaptureClient_Release((IAudioCaptureClient *)userdata);
+    return 0;
+}
+
+static int mgmtthrtask_ReleaseRenderClient(void *userdata)
+{
+    IAudioRenderClient_Release((IAudioRenderClient *)userdata);
+    return 0;
+}
+
+static int mgmtthrtask_ResetWasapiDevice(void *userdata)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)userdata;
+
+    if (!device || !device->hidden) {
+        return 0;
+    }
+
+    if (device->hidden->client) {
+        IAudioClient_Stop(device->hidden->client);
+        IAudioClient_Release(device->hidden->client);
+        device->hidden->client = NULL;
+    }
+
+    if (device->hidden->render) {
+        // this is silly, but this will block indefinitely if you call it from SDLMMNotificationClient_OnDefaultDeviceChanged, so
+        //  proxy this to the management thread to be released later.
+        WASAPI_ProxyToManagementThread(mgmtthrtask_ReleaseRenderClient, device->hidden->render, NULL);
+        device->hidden->render = NULL;
+    }
+
+    if (device->hidden->capture) {
+        // this is silly, but this will block indefinitely if you call it from SDLMMNotificationClient_OnDefaultDeviceChanged, so
+        //  proxy this to the management thread to be released later.
+        WASAPI_ProxyToManagementThread(mgmtthrtask_ReleaseCaptureClient, device->hidden->capture, NULL);
+        device->hidden->capture = NULL;
+    }
+
+    if (device->hidden->waveformat) {
+        CoTaskMemFree(device->hidden->waveformat);
+        device->hidden->waveformat = NULL;
+    }
+
+    if (device->hidden->activation_handler) {
+        WASAPI_PlatformDeleteActivationHandler(device->hidden->activation_handler);
+        device->hidden->activation_handler = NULL;
+    }
+
+    if (device->hidden->event) {
+        CloseHandle(device->hidden->event);
+        device->hidden->event = NULL;
+    }
+
+    return 0;
+}
+
+static void ResetWasapiDevice(SDL_AudioDevice *device)
+{
+    int rc;
+    WASAPI_ProxyToManagementThread(mgmtthrtask_ResetWasapiDevice, device, &rc);
+}
+
+static int mgmtthrtask_ActivateDevice(void *userdata)
+{
+    return WASAPI_ActivateDevice((SDL_AudioDevice *)userdata);
+}
+
+static int ActivateWasapiDevice(SDL_AudioDevice *device)
+{
+    // this blocks because we're either being notified from a background thread or we're running during device open,
+    //  both of which won't deadlock vs the device thread.
+    int rc = -1;
+    return ((WASAPI_ProxyToManagementThread(mgmtthrtask_ActivateDevice, device, &rc) < 0) || (rc < 0)) ? -1 : 0;
+}
+
+// do not call when holding the device lock!
+static SDL_bool RecoverWasapiDevice(SDL_AudioDevice *device)
+{
+    ResetWasapiDevice(device); // dump the lost device's handles.
+
+    // This handles a non-default device that simply had its format changed in the Windows Control Panel.
+    if (ActivateWasapiDevice(device) == -1) {
+        WASAPI_DisconnectDevice(device);
+        return SDL_FALSE;
+    }
+
+    device->hidden->device_lost = SDL_FALSE;
+
+    return SDL_TRUE; // okay, carry on with new device details!
+}
+
+// do not call when holding the device lock!
+static SDL_bool RecoverWasapiIfLost(SDL_AudioDevice *device)
+{
+    if (SDL_AtomicGet(&device->shutdown)) {
+        return SDL_FALSE; // already failed.
+    } else if (device->hidden->device_dead) {  // had a fatal error elsewhere, clean up and quit
+        IAudioClient_Stop(device->hidden->client);
+        WASAPI_DisconnectDevice(device);
+        SDL_assert(SDL_AtomicGet(&device->shutdown));  // so we don't come back through here.
+        return SDL_FALSE; // already failed.
+    } else if (SDL_AtomicGet(&device->zombie)) {
+        return SDL_FALSE;  // we're already dead, so just leave and let the Zombie implementations take over.
+    } else if (!device->hidden->client) {
+        return SDL_TRUE; // still waiting for activation.
+    }
+
+    return device->hidden->device_lost ? RecoverWasapiDevice(device) : SDL_TRUE;
+}
+
+static Uint8 *WASAPI_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    // get an endpoint buffer from WASAPI.
+    BYTE *buffer = NULL;
+
+    if (device->hidden->render) {
+        if (WasapiFailed(device, IAudioRenderClient_GetBuffer(device->hidden->render, device->sample_frames, &buffer))) {
+            SDL_assert(buffer == NULL);
+            if (device->hidden->device_lost) {  // just use an available buffer, we won't be playing it anyhow.
+                *buffer_size = 0;  // we'll recover during WaitDevice and try again.
+            }
+        }
+    }
+
+    return (Uint8 *)buffer;
+}
+
+static int WASAPI_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    if (device->hidden->render != NULL) { // definitely activated?
+        // WasapiFailed() will mark the device for reacquisition or removal elsewhere.
+        WasapiFailed(device, IAudioRenderClient_ReleaseBuffer(device->hidden->render, device->sample_frames, 0));
+    }
+    return 0;
+}
+
+static int WASAPI_WaitDevice(SDL_AudioDevice *device)
+{
+    // WaitDevice does not hold the device lock, so check for recovery/disconnect details here.
+    while (RecoverWasapiIfLost(device) && device->hidden->client && device->hidden->event) {
+        DWORD waitResult = WaitForSingleObjectEx(device->hidden->event, 200, FALSE);
+        if (waitResult == WAIT_OBJECT_0) {
+            const UINT32 maxpadding = device->sample_frames;
+            UINT32 padding = 0;
+            if (!WasapiFailed(device, IAudioClient_GetCurrentPadding(device->hidden->client, &padding))) {
+                //SDL_Log("WASAPI EVENT! padding=%u maxpadding=%u", (unsigned int)padding, (unsigned int)maxpadding);*/
+                if (device->iscapture && (padding > 0)) {
+                    break;
+                } else if (!device->iscapture && (padding <= maxpadding)) {
+                    break;
+                }
+            }
+        } else if (waitResult != WAIT_TIMEOUT) {
+            //SDL_Log("WASAPI FAILED EVENT!");*/
+            IAudioClient_Stop(device->hidden->client);
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+static int WASAPI_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    BYTE *ptr = NULL;
+    UINT32 frames = 0;
+    DWORD flags = 0;
+
+    while (device->hidden->capture) {
+        const HRESULT ret = IAudioCaptureClient_GetBuffer(device->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
+        if (ret == AUDCLNT_S_BUFFER_EMPTY) {
+            return 0;  // in theory we should have waited until there was data, but oh well, we'll go back to waiting. Returning 0 is safe in SDL3.
+        }
+
+        WasapiFailed(device, ret); // mark device lost/failed if necessary.
+
+        if (ret == S_OK) {
+            const int total = ((int)frames) * device->hidden->framesize;
+            const int cpy = SDL_min(buflen, total);
+            const int leftover = total - cpy;
+            const SDL_bool silent = (flags & AUDCLNT_BUFFERFLAGS_SILENT) ? SDL_TRUE : SDL_FALSE;
+
+            SDL_assert(leftover == 0);  // according to MSDN, this isn't everything available, just one "packet" of data per-GetBuffer call.
+
+            if (silent) {
+                SDL_memset(buffer, device->silence_value, cpy);
+            } else {
+                SDL_memcpy(buffer, ptr, cpy);
+            }
+
+            WasapiFailed(device, IAudioCaptureClient_ReleaseBuffer(device->hidden->capture, frames));
+
+            return cpy;
+        }
+    }
+
+    return -1; // unrecoverable error.
+}
+
+static void WASAPI_FlushCapture(SDL_AudioDevice *device)
+{
+    BYTE *ptr = NULL;
+    UINT32 frames = 0;
+    DWORD flags = 0;
+
+    // just read until we stop getting packets, throwing them away.
+    while (!SDL_AtomicGet(&device->shutdown) && device->hidden->capture) {
+        const HRESULT ret = IAudioCaptureClient_GetBuffer(device->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
+        if (ret == AUDCLNT_S_BUFFER_EMPTY) {
+            break; // no more buffered data; we're done.
+        } else if (WasapiFailed(device, ret)) {
+            break; // failed for some other reason, abort.
+        } else if (WasapiFailed(device, IAudioCaptureClient_ReleaseBuffer(device->hidden->capture, frames))) {
+            break; // something broke.
+        }
+    }
+}
+
+static void WASAPI_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        ResetWasapiDevice(device);
+        SDL_free(device->hidden->devid);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static int mgmtthrtask_PrepDevice(void *userdata)
+{
+    SDL_AudioDevice *device = (SDL_AudioDevice *)userdata;
+
+    /* !!! FIXME: we could request an exclusive mode stream, which is lower latency;
+       !!!  it will write into the kernel's audio buffer directly instead of
+       !!!  shared memory that a user-mode mixer then writes to the kernel with
+       !!!  everything else. Doing this means any other sound using this device will
+       !!!  stop playing, including the user's MP3 player and system notification
+       !!!  sounds. You'd probably need to release the device when the app isn't in
+       !!!  the foreground, to be a good citizen of the system. It's doable, but it's
+       !!!  more work and causes some annoyances, and I don't know what the latency
+       !!!  wins actually look like. Maybe add a hint to force exclusive mode at
+       !!!  some point. To be sure, defaulting to shared mode is the right thing to
+       !!!  do in any case. */
+    const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
+
+    IAudioClient *client = device->hidden->client;
+    SDL_assert(client != NULL);
+
+#if defined(__WINRT__) || defined(__GDK__) // CreateEventEx() arrived in Vista, so we need an #ifdef for XP.
+    device->hidden->event = CreateEventEx(NULL, NULL, 0, EVENT_ALL_ACCESS);
+#else
+    device->hidden->event = CreateEventW(NULL, 0, 0, NULL);
+#endif
+
+    if (device->hidden->event == NULL) {
+        return WIN_SetError("WASAPI can't create an event handle");
+    }
+
+    HRESULT ret;
+
+    WAVEFORMATEX *waveformat = NULL;
+    ret = IAudioClient_GetMixFormat(client, &waveformat);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine mix format", ret);
+    }
+    SDL_assert(waveformat != NULL);
+    device->hidden->waveformat = waveformat;
+
+    SDL_AudioSpec newspec;
+    newspec.channels = (Uint8)waveformat->nChannels;
+
+    // Make sure we have a valid format that we can convert to whatever WASAPI wants.
+    const SDL_AudioFormat wasapi_format = SDL_WaveFormatExToSDLFormat(waveformat);
+
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if (test_format == wasapi_format) {
+            newspec.format = test_format;
+            break;
+        }
+    }
+
+    if (!test_format) {
+        return SDL_SetError("%s: Unsupported audio format", "wasapi");
+    }
+
+    REFERENCE_TIME default_period = 0;
+    ret = IAudioClient_GetDevicePeriod(client, &default_period, NULL);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret);
+    }
+
+    DWORD streamflags = 0;
+
+    /* we've gotten reports that WASAPI's resampler introduces distortions, but in the short term
+       it fixes some other WASAPI-specific quirks we haven't quite tracked down.
+       Refer to bug #6326 for the immediate concern. */
+#if 1
+    // favor WASAPI's resampler over our own
+    if ((DWORD)device->spec.freq != waveformat->nSamplesPerSec) {
+        streamflags |= (AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM | AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY);
+        waveformat->nSamplesPerSec = device->spec.freq;
+        waveformat->nAvgBytesPerSec = waveformat->nSamplesPerSec * waveformat->nChannels * (waveformat->wBitsPerSample / 8);
+    }
+#endif
+
+    newspec.freq = waveformat->nSamplesPerSec;
+
+    streamflags |= AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
+    ret = IAudioClient_Initialize(client, sharemode, streamflags, 0, 0, waveformat, NULL);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret);
+    }
+
+    ret = IAudioClient_SetEventHandle(client, device->hidden->event);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't set event handle", ret);
+    }
+
+    UINT32 bufsize = 0; // this is in sample frames, not samples, not bytes.
+    ret = IAudioClient_GetBufferSize(client, &bufsize);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine buffer size", ret);
+    }
+
+    /* Match the callback size to the period size to cut down on the number of
+       interrupts waited for in each call to WaitDevice */
+    const float period_millis = default_period / 10000.0f;
+    const float period_frames = period_millis * newspec.freq / 1000.0f;
+    const int new_sample_frames = (int) SDL_ceilf(period_frames);
+
+    // Update the fragment size as size in bytes
+    if (SDL_AudioDeviceFormatChangedAlreadyLocked(device, &newspec, new_sample_frames) < 0) {
+        return -1;
+    }
+
+    device->hidden->framesize = SDL_AUDIO_FRAMESIZE(device->spec);
+
+    if (device->iscapture) {
+        IAudioCaptureClient *capture = NULL;
+        ret = IAudioClient_GetService(client, &SDL_IID_IAudioCaptureClient, (void **)&capture);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't get capture client service", ret);
+        }
+
+        SDL_assert(capture != NULL);
+        device->hidden->capture = capture;
+        ret = IAudioClient_Start(client);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't start capture", ret);
+        }
+
+        WASAPI_FlushCapture(device); // MSDN says you should flush capture endpoint right after startup.
+    } else {
+        IAudioRenderClient *render = NULL;
+        ret = IAudioClient_GetService(client, &SDL_IID_IAudioRenderClient, (void **)&render);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't get render client service", ret);
+        }
+
+        SDL_assert(render != NULL);
+        device->hidden->render = render;
+        ret = IAudioClient_Start(client);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't start playback", ret);
+        }
+    }
+
+    return 0; // good to go.
+}
+
+// This is called once a device is activated, possibly asynchronously.
+int WASAPI_PrepDevice(SDL_AudioDevice *device)
+{
+    int rc = 0;
+    return (WASAPI_ProxyToManagementThread(mgmtthrtask_PrepDevice, device, &rc) < 0) ? -1 : rc;
+}
+
+static int WASAPI_OpenDevice(SDL_AudioDevice *device)
+{
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (device->hidden == NULL) {
+        return SDL_OutOfMemory();
+    } else if (ActivateWasapiDevice(device) < 0) {
+        return -1; // already set error.
+    }
+
+    /* Ready, but possibly waiting for async device activation.
+       Until activation is successful, we will report silence from capture
+       devices and ignore data on playback devices. Upon activation, we'll make
+       sure any bound audio streams are adjusted for the final device format. */
+
+    return 0;
+}
+
+static void WASAPI_ThreadInit(SDL_AudioDevice *device)
+{
+    WASAPI_PlatformThreadInit(device);
+}
+
+static void WASAPI_ThreadDeinit(SDL_AudioDevice *device)
+{
+    WASAPI_PlatformThreadDeinit(device);
+}
+
+static int mgmtthrtask_FreeDeviceHandle(void *userdata)
+{
+    WASAPI_PlatformFreeDeviceHandle((SDL_AudioDevice *)userdata);
+    return 0;
+}
+
+static void WASAPI_FreeDeviceHandle(SDL_AudioDevice *device)
+{
+    int rc;
+    WASAPI_ProxyToManagementThread(mgmtthrtask_FreeDeviceHandle, device, &rc);
+}
+
+static int mgmtthrtask_DeinitializeStart(void *userdata)
+{
+    WASAPI_PlatformDeinitializeStart();
+    return 0;
+}
+
+static void WASAPI_DeinitializeStart(void)
+{
+    int rc;
+    WASAPI_ProxyToManagementThread(mgmtthrtask_DeinitializeStart, NULL, &rc);
+}
+
+static void WASAPI_Deinitialize(void)
+{
+    DeinitManagementThread();
+}
+
+static SDL_bool WASAPI_Init(SDL_AudioDriverImpl *impl)
+{
+    if (InitManagementThread() < 0) {
+        return SDL_FALSE;
+    }
+
+    impl->DetectDevices = WASAPI_DetectDevices;
+    impl->ThreadInit = WASAPI_ThreadInit;
+    impl->ThreadDeinit = WASAPI_ThreadDeinit;
+    impl->OpenDevice = WASAPI_OpenDevice;
+    impl->PlayDevice = WASAPI_PlayDevice;
+    impl->WaitDevice = WASAPI_WaitDevice;
+    impl->GetDeviceBuf = WASAPI_GetDeviceBuf;
+    impl->WaitCaptureDevice = WASAPI_WaitDevice;
+    impl->CaptureFromDevice = WASAPI_CaptureFromDevice;
+    impl->FlushCapture = WASAPI_FlushCapture;
+    impl->CloseDevice = WASAPI_CloseDevice;
+    impl->DeinitializeStart = WASAPI_DeinitializeStart;
+    impl->Deinitialize = WASAPI_Deinitialize;
+    impl->FreeDeviceHandle = WASAPI_FreeDeviceHandle;
+
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return SDL_TRUE;
+}
+
+AudioBootStrap WASAPI_bootstrap = {
+    "wasapi", "WASAPI", WASAPI_Init, SDL_FALSE
+};
+
+#endif // SDL_AUDIO_DRIVER_WASAPI

vendor/sdl-3.0.0/src/audio/wasapi/SDL_wasapi.h

@@ -0,0 +1,73 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_wasapi_h_
+#define SDL_wasapi_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    WCHAR *devid;
+    WAVEFORMATEX *waveformat;
+    IAudioClient *client;
+    IAudioRenderClient *render;
+    IAudioCaptureClient *capture;
+    HANDLE event;
+    HANDLE task;
+    SDL_bool coinitialized;
+    int framesize;
+    SDL_bool device_lost;
+    SDL_bool device_dead;
+    void *activation_handler;
+};
+
+// win32 and winrt implementations call into these.
+int WASAPI_PrepDevice(SDL_AudioDevice *device);
+void WASAPI_DisconnectDevice(SDL_AudioDevice *device);  // don't hold the device lock when calling this!
+
+
+// BE CAREFUL: if you are holding the device lock and proxy to the management thread with wait_until_complete, and grab the lock again, you will deadlock.
+typedef int (*ManagementThreadTask)(void *userdata);
+int WASAPI_ProxyToManagementThread(ManagementThreadTask task, void *userdata, int *wait_until_complete);
+
+// These are functions that are implemented differently for Windows vs WinRT.
+// UNLESS OTHERWISE NOTED THESE ALL HAPPEN ON THE MANAGEMENT THREAD.
+int WASAPI_PlatformInit(void);
+void WASAPI_PlatformDeinit(void);
+void WASAPI_PlatformDeinitializeStart(void);
+void WASAPI_EnumerateEndpoints(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture);
+int WASAPI_ActivateDevice(SDL_AudioDevice *device);
+void WASAPI_PlatformThreadInit(SDL_AudioDevice *device);  // this happens on the audio device thread, not the management thread.
+void WASAPI_PlatformThreadDeinit(SDL_AudioDevice *device);  // this happens on the audio device thread, not the management thread.
+void WASAPI_PlatformDeleteActivationHandler(void *handler);
+void WASAPI_PlatformFreeDeviceHandle(SDL_AudioDevice *device);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // SDL_wasapi_h_

vendor/sdl-3.0.0/src/audio/wasapi/SDL_wasapi_win32.c

@@ -0,0 +1,195 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* This is code that Windows uses to talk to WASAPI-related system APIs.
+   This is for non-WinRT desktop apps. The C++/CX implementation of these
+   functions, exclusive to WinRT, are in SDL_wasapi_winrt.cpp.
+   The code in SDL_wasapi.c is used by both standard Windows and WinRT builds
+   to deal with audio and calls into these functions. */
+
+#if defined(SDL_AUDIO_DRIVER_WASAPI) && !defined(__WINRT__)
+
+#include "../../core/windows/SDL_windows.h"
+#include "../../core/windows/SDL_immdevice.h"
+#include "../SDL_sysaudio.h"
+
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+// handle to Avrt.dll--Vista and later!--for flagging the callback thread as "Pro Audio" (low latency).
+static HMODULE libavrt = NULL;
+typedef HANDLE(WINAPI *pfnAvSetMmThreadCharacteristicsW)(LPCWSTR, LPDWORD);
+typedef BOOL(WINAPI *pfnAvRevertMmThreadCharacteristics)(HANDLE);
+static pfnAvSetMmThreadCharacteristicsW pAvSetMmThreadCharacteristicsW = NULL;
+static pfnAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
+
+static SDL_bool immdevice_initialized = SDL_FALSE;
+
+// Some GUIDs we need to know without linking to libraries that aren't available before Vista.
+static const IID SDL_IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32, { 0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2 } };
+
+static int mgmtthrtask_AudioDeviceDisconnected(void *userdata)
+{
+    SDL_AudioDeviceDisconnected((SDL_AudioDevice *)userdata);
+    return 0;
+}
+
+static void WASAPI_AudioDeviceDisconnected(SDL_AudioDevice *device)
+{
+    // don't wait on this, IMMDevice's own thread needs to return or everything will deadlock.
+    WASAPI_ProxyToManagementThread(mgmtthrtask_AudioDeviceDisconnected, device, NULL);
+}
+
+static int mgmtthrtask_DefaultAudioDeviceChanged(void *userdata)
+{
+    SDL_DefaultAudioDeviceChanged((SDL_AudioDevice *) userdata);
+    return 0;
+}
+
+static void WASAPI_DefaultAudioDeviceChanged(SDL_AudioDevice *new_default_device)
+{
+    // don't wait on this, IMMDevice's own thread needs to return or everything will deadlock.
+    WASAPI_ProxyToManagementThread(mgmtthrtask_DefaultAudioDeviceChanged, new_default_device, NULL);
+}
+
+int WASAPI_PlatformInit(void)
+{
+    const SDL_IMMDevice_callbacks callbacks = { WASAPI_AudioDeviceDisconnected, WASAPI_DefaultAudioDeviceChanged };
+    if (FAILED(WIN_CoInitialize())) {
+        return SDL_SetError("CoInitialize() failed");
+    } else if (SDL_IMMDevice_Init(&callbacks) < 0) {
+        return -1; // Error string is set by SDL_IMMDevice_Init
+    }
+
+    immdevice_initialized = SDL_TRUE;
+
+    libavrt = LoadLibrary(TEXT("avrt.dll")); // this library is available in Vista and later. No WinXP, so have to LoadLibrary to use it for now!
+    if (libavrt) {
+        pAvSetMmThreadCharacteristicsW = (pfnAvSetMmThreadCharacteristicsW)GetProcAddress(libavrt, "AvSetMmThreadCharacteristicsW");
+        pAvRevertMmThreadCharacteristics = (pfnAvRevertMmThreadCharacteristics)GetProcAddress(libavrt, "AvRevertMmThreadCharacteristics");
+    }
+
+    return 0;
+}
+
+static void StopWasapiHotplug(void)
+{
+    if (immdevice_initialized) {
+        SDL_IMMDevice_Quit();
+        immdevice_initialized = SDL_FALSE;
+    }
+}
+
+void WASAPI_PlatformDeinit(void)
+{
+    if (libavrt) {
+        FreeLibrary(libavrt);
+        libavrt = NULL;
+    }
+
+    pAvSetMmThreadCharacteristicsW = NULL;
+    pAvRevertMmThreadCharacteristics = NULL;
+
+    StopWasapiHotplug();
+
+    WIN_CoUninitialize();
+}
+
+void WASAPI_PlatformDeinitializeStart(void)
+{
+    StopWasapiHotplug();
+}
+
+void WASAPI_PlatformThreadInit(SDL_AudioDevice *device)
+{
+    // this thread uses COM.
+    if (SUCCEEDED(WIN_CoInitialize())) { // can't report errors, hope it worked!
+        device->hidden->coinitialized = SDL_TRUE;
+    }
+
+    // Set this thread to very high "Pro Audio" priority.
+    if (pAvSetMmThreadCharacteristicsW) {
+        DWORD idx = 0;
+        device->hidden->task = pAvSetMmThreadCharacteristicsW(L"Pro Audio", &idx);
+    } else {
+        SDL_SetThreadPriority(device->iscapture ? SDL_THREAD_PRIORITY_HIGH : SDL_THREAD_PRIORITY_TIME_CRITICAL);
+    }
+
+}
+
+void WASAPI_PlatformThreadDeinit(SDL_AudioDevice *device)
+{
+    // Set this thread back to normal priority.
+    if (device->hidden->task && pAvRevertMmThreadCharacteristics) {
+        pAvRevertMmThreadCharacteristics(device->hidden->task);
+        device->hidden->task = NULL;
+    }
+
+    if (device->hidden->coinitialized) {
+        WIN_CoUninitialize();
+        device->hidden->coinitialized = SDL_FALSE;
+    }
+}
+
+int WASAPI_ActivateDevice(SDL_AudioDevice *device)
+{
+    IMMDevice *immdevice = NULL;
+    if (SDL_IMMDevice_Get(device, &immdevice, device->iscapture) < 0) {
+        device->hidden->client = NULL;
+        return -1; // This is already set by SDL_IMMDevice_Get
+    }
+
+    // this is _not_ async in standard win32, yay!
+    HRESULT ret = IMMDevice_Activate(immdevice, &SDL_IID_IAudioClient, CLSCTX_ALL, NULL, (void **)&device->hidden->client);
+    IMMDevice_Release(immdevice);
+
+    if (FAILED(ret)) {
+        SDL_assert(device->hidden->client == NULL);
+        return WIN_SetErrorFromHRESULT("WASAPI can't activate audio endpoint", ret);
+    }
+
+    SDL_assert(device->hidden->client != NULL);
+    if (WASAPI_PrepDevice(device) == -1) { // not async, fire it right away.
+        return -1;
+    }
+
+    return 0; // good to go.
+}
+
+void WASAPI_EnumerateEndpoints(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    SDL_IMMDevice_EnumerateEndpoints(default_output, default_capture);
+}
+
+void WASAPI_PlatformDeleteActivationHandler(void *handler)
+{
+    // not asynchronous.
+    SDL_assert(!"This function should have only been called on WinRT.");
+}
+
+void WASAPI_PlatformFreeDeviceHandle(SDL_AudioDevice *device)
+{
+    SDL_IMMDevice_FreeDeviceHandle(device);
+}
+
+#endif // SDL_AUDIO_DRIVER_WASAPI && !defined(__WINRT__)

vendor/sdl-3.0.0/src/audio/wasapi/SDL_wasapi_winrt.cpp

@@ -0,0 +1,360 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+// This is C++/CX code that the WinRT port uses to talk to WASAPI-related
+//  system APIs. The C implementation of these functions, for non-WinRT apps,
+//  is in SDL_wasapi_win32.c. The code in SDL_wasapi.c is used by both standard
+//  Windows and WinRT builds to deal with audio and calls into these functions.
+
+#if defined(SDL_AUDIO_DRIVER_WASAPI) && defined(__WINRT__)
+
+#include <Windows.h>
+#include <windows.ui.core.h>
+#include <windows.devices.enumeration.h>
+#include <windows.media.devices.h>
+#include <wrl/implements.h>
+#include <collection.h>
+
+extern "C" {
+#include "../../core/windows/SDL_windows.h"
+#include "../SDL_sysaudio.h"
+}
+
+#define COBJMACROS
+#include <mmdeviceapi.h>
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+using namespace Windows::Devices::Enumeration;
+using namespace Windows::Media::Devices;
+using namespace Windows::Foundation;
+using namespace Microsoft::WRL;
+
+static Platform::String ^ SDL_PKEY_AudioEngine_DeviceFormat = L"{f19f064d-082c-4e27-bc73-6882a1bb8e4c} 0";
+
+
+static SDL_bool FindWinRTAudioDeviceCallback(SDL_AudioDevice *device, void *userdata)
+{
+    return (SDL_wcscmp((LPCWSTR) device->handle, (LPCWSTR) userdata) == 0) ? SDL_TRUE : SDL_FALSE;
+}
+
+static SDL_AudioDevice *FindWinRTAudioDevice(LPCWSTR devid)
+{
+    return SDL_FindPhysicalAudioDeviceByCallback(FindWinRTAudioDeviceCallback, (void *) devid);
+}
+
+class SDL_WasapiDeviceEventHandler
+{
+  public:
+    SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture);
+    ~SDL_WasapiDeviceEventHandler();
+    void OnDeviceAdded(DeviceWatcher ^ sender, DeviceInformation ^ args);
+    void OnDeviceRemoved(DeviceWatcher ^ sender, DeviceInformationUpdate ^ args);
+    void OnDeviceUpdated(DeviceWatcher ^ sender, DeviceInformationUpdate ^ args);
+    void OnEnumerationCompleted(DeviceWatcher ^ sender, Platform::Object ^ args);
+    void OnDefaultRenderDeviceChanged(Platform::Object ^ sender, DefaultAudioRenderDeviceChangedEventArgs ^ args);
+    void OnDefaultCaptureDeviceChanged(Platform::Object ^ sender, DefaultAudioCaptureDeviceChangedEventArgs ^ args);
+    void WaitForCompletion();
+
+  private:
+    SDL_Semaphore *completed_semaphore;
+    const SDL_bool iscapture;
+    DeviceWatcher ^ watcher;
+    Windows::Foundation::EventRegistrationToken added_handler;
+    Windows::Foundation::EventRegistrationToken removed_handler;
+    Windows::Foundation::EventRegistrationToken updated_handler;
+    Windows::Foundation::EventRegistrationToken completed_handler;
+    Windows::Foundation::EventRegistrationToken default_changed_handler;
+};
+
+SDL_WasapiDeviceEventHandler::SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture)
+    : iscapture(_iscapture), completed_semaphore(SDL_CreateSemaphore(0))
+{
+    if (!completed_semaphore) {
+        return; // uhoh.
+    }
+
+    Platform::String ^ selector = _iscapture ? MediaDevice::GetAudioCaptureSelector() : MediaDevice::GetAudioRenderSelector();
+    Platform::Collections::Vector<Platform::String ^> properties;
+    properties.Append(SDL_PKEY_AudioEngine_DeviceFormat);
+    watcher = DeviceInformation::CreateWatcher(selector, properties.GetView());
+    if (!watcher)
+        return; // uhoh.
+
+    // !!! FIXME: this doesn't need a lambda here, I think, if I make SDL_WasapiDeviceEventHandler a proper C++/CX class. --ryan.
+    added_handler = watcher->Added += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformation ^>([this](DeviceWatcher ^ sender, DeviceInformation ^ args) { OnDeviceAdded(sender, args); });
+    removed_handler = watcher->Removed += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformationUpdate ^>([this](DeviceWatcher ^ sender, DeviceInformationUpdate ^ args) { OnDeviceRemoved(sender, args); });
+    updated_handler = watcher->Updated += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformationUpdate ^>([this](DeviceWatcher ^ sender, DeviceInformationUpdate ^ args) { OnDeviceUpdated(sender, args); });
+    completed_handler = watcher->EnumerationCompleted += ref new TypedEventHandler<DeviceWatcher ^, Platform::Object ^>([this](DeviceWatcher ^ sender, Platform::Object ^ args) { OnEnumerationCompleted(sender, args); });
+    if (iscapture) {
+        default_changed_handler = MediaDevice::DefaultAudioCaptureDeviceChanged += ref new TypedEventHandler<Platform::Object ^, DefaultAudioCaptureDeviceChangedEventArgs ^>([this](Platform::Object ^ sender, DefaultAudioCaptureDeviceChangedEventArgs ^ args) { OnDefaultCaptureDeviceChanged(sender, args); });
+    } else {
+        default_changed_handler = MediaDevice::DefaultAudioRenderDeviceChanged += ref new TypedEventHandler<Platform::Object ^, DefaultAudioRenderDeviceChangedEventArgs ^>([this](Platform::Object ^ sender, DefaultAudioRenderDeviceChangedEventArgs ^ args) { OnDefaultRenderDeviceChanged(sender, args); });
+    }
+    watcher->Start();
+}
+
+SDL_WasapiDeviceEventHandler::~SDL_WasapiDeviceEventHandler()
+{
+    if (watcher) {
+        watcher->Added -= added_handler;
+        watcher->Removed -= removed_handler;
+        watcher->Updated -= updated_handler;
+        watcher->EnumerationCompleted -= completed_handler;
+        watcher->Stop();
+        watcher = nullptr;
+    }
+
+    if (completed_semaphore) {
+        SDL_DestroySemaphore(completed_semaphore);
+        completed_semaphore = nullptr;
+    }
+
+    if (iscapture) {
+        MediaDevice::DefaultAudioCaptureDeviceChanged -= default_changed_handler;
+    } else {
+        MediaDevice::DefaultAudioRenderDeviceChanged -= default_changed_handler;
+    }
+}
+
+void SDL_WasapiDeviceEventHandler::OnDeviceAdded(DeviceWatcher ^ sender, DeviceInformation ^ info)
+{
+    /* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
+       In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
+       phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
+       available and switch automatically. (!!! FIXME...?) */
+
+    SDL_assert(sender == this->watcher);
+    char *utf8dev = WIN_StringToUTF8(info->Name->Data());
+    if (utf8dev) {
+        SDL_AudioSpec spec;
+        SDL_zero(spec);
+
+        Platform::Object ^ obj = info->Properties->Lookup(SDL_PKEY_AudioEngine_DeviceFormat);
+        if (obj) {
+            IPropertyValue ^ property = (IPropertyValue ^) obj;
+            Platform::Array<unsigned char> ^ data;
+            property->GetUInt8Array(&data);
+            WAVEFORMATEXTENSIBLE fmt;
+            SDL_zero(fmt);
+            SDL_memcpy(&fmt, data->Data, SDL_min(data->Length, sizeof(WAVEFORMATEXTENSIBLE)));
+            spec.channels = (Uint8)fmt.Format.nChannels;
+            spec.freq = fmt.Format.nSamplesPerSec;
+            spec.format = SDL_WaveFormatExToSDLFormat((WAVEFORMATEX *)&fmt);
+        }
+
+        LPWSTR devid = SDL_wcsdup(info->Id->Data());
+        if (devid) {
+            SDL_AddAudioDevice(this->iscapture, utf8dev, spec.channels ? &spec : NULL, devid);
+        }
+        SDL_free(utf8dev);
+    }
+}
+
+void SDL_WasapiDeviceEventHandler::OnDeviceRemoved(DeviceWatcher ^ sender, DeviceInformationUpdate ^ info)
+{
+    SDL_assert(sender == this->watcher);
+    WASAPI_DisconnectDevice(FindWinRTAudioDevice(info->Id->Data()));
+}
+
+void SDL_WasapiDeviceEventHandler::OnDeviceUpdated(DeviceWatcher ^ sender, DeviceInformationUpdate ^ args)
+{
+    SDL_assert(sender == this->watcher);
+}
+
+void SDL_WasapiDeviceEventHandler::OnEnumerationCompleted(DeviceWatcher ^ sender, Platform::Object ^ args)
+{
+    SDL_assert(sender == this->watcher);
+    if (this->completed_semaphore) {
+        SDL_PostSemaphore(this->completed_semaphore);
+    }
+}
+
+void SDL_WasapiDeviceEventHandler::OnDefaultRenderDeviceChanged(Platform::Object ^ sender, DefaultAudioRenderDeviceChangedEventArgs ^ args)
+{
+    SDL_assert(!this->iscapture);
+    SDL_DefaultAudioDeviceChanged(FindWinRTAudioDevice(args->Id->Data()));
+}
+
+void SDL_WasapiDeviceEventHandler::OnDefaultCaptureDeviceChanged(Platform::Object ^ sender, DefaultAudioCaptureDeviceChangedEventArgs ^ args)
+{
+    SDL_assert(this->iscapture);
+    SDL_DefaultAudioDeviceChanged(FindWinRTAudioDevice(args->Id->Data()));
+}
+
+void SDL_WasapiDeviceEventHandler::WaitForCompletion()
+{
+    if (this->completed_semaphore) {
+        SDL_WaitSemaphore(this->completed_semaphore);
+        SDL_DestroySemaphore(this->completed_semaphore);
+        this->completed_semaphore = nullptr;
+    }
+}
+
+static SDL_WasapiDeviceEventHandler *playback_device_event_handler;
+static SDL_WasapiDeviceEventHandler *capture_device_event_handler;
+
+int WASAPI_PlatformInit(void)
+{
+    return 0;
+}
+
+static void StopWasapiHotplug(void)
+{
+    delete playback_device_event_handler;
+    playback_device_event_handler = nullptr;
+    delete capture_device_event_handler;
+    capture_device_event_handler = nullptr;
+}
+
+void WASAPI_PlatformDeinit(void)
+{
+    StopWasapiHotplug();
+}
+
+void WASAPI_PlatformDeinitializeStart(void)
+{
+    StopWasapiHotplug();
+}
+
+
+void WASAPI_EnumerateEndpoints(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
+{
+    Platform::String ^ defdevid;
+
+    // DeviceWatchers will fire an Added event for each existing device at
+    //  startup, so we don't need to enumerate them separately before
+    //  listening for updates.
+    playback_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_FALSE);
+    playback_device_event_handler->WaitForCompletion();
+    defdevid = MediaDevice::GetDefaultAudioRenderId(AudioDeviceRole::Default);
+    if (defdevid) {
+        *default_output = FindWinRTAudioDevice(defdevid->Data());
+    }
+
+    capture_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_TRUE);
+    capture_device_event_handler->WaitForCompletion();
+    defdevid = MediaDevice::GetDefaultAudioCaptureId(AudioDeviceRole::Default);
+    if (defdevid) {
+        *default_capture = FindWinRTAudioDevice(defdevid->Data());
+    }
+}
+
+class SDL_WasapiActivationHandler : public RuntimeClass<RuntimeClassFlags<ClassicCom>, FtmBase, IActivateAudioInterfaceCompletionHandler>
+{
+public:
+    SDL_WasapiActivationHandler() : completion_semaphore(SDL_CreateSemaphore(0)) { SDL_assert(completion_semaphore != NULL); }
+    STDMETHOD(ActivateCompleted)(IActivateAudioInterfaceAsyncOperation *operation);
+    void WaitForCompletion();
+private:
+    SDL_Semaphore *completion_semaphore;
+};
+
+void SDL_WasapiActivationHandler::WaitForCompletion()
+{
+    if (completion_semaphore) {
+        SDL_WaitSemaphore(completion_semaphore);
+        SDL_DestroySemaphore(completion_semaphore);
+        completion_semaphore = NULL;
+    }
+}
+
+HRESULT
+SDL_WasapiActivationHandler::ActivateCompleted(IActivateAudioInterfaceAsyncOperation *async)
+{
+    // Just set a flag, since we're probably in a different thread. We'll pick it up and init everything on our own thread to prevent races.
+    SDL_PostSemaphore(completion_semaphore);
+    return S_OK;
+}
+
+void WASAPI_PlatformDeleteActivationHandler(void *handler)
+{
+    ((SDL_WasapiActivationHandler *)handler)->Release();
+}
+
+int WASAPI_ActivateDevice(SDL_AudioDevice *device)
+{
+    LPCWSTR devid = (LPCWSTR) device->handle;
+    SDL_assert(devid != NULL);
+
+    ComPtr<SDL_WasapiActivationHandler> handler = Make<SDL_WasapiActivationHandler>();
+    if (handler == nullptr) {
+        return SDL_SetError("Failed to allocate WASAPI activation handler");
+    }
+
+    handler.Get()->AddRef(); // we hold a reference after ComPtr destructs on return, causing a Release, and Release ourselves in WASAPI_PlatformDeleteActivationHandler(), etc.
+    device->hidden->activation_handler = handler.Get();
+
+    IActivateAudioInterfaceAsyncOperation *async = nullptr;
+    const HRESULT ret = ActivateAudioInterfaceAsync(devid, __uuidof(IAudioClient), nullptr, handler.Get(), &async);
+
+    if (FAILED(ret) || async == nullptr) {
+        if (async != nullptr) {
+            async->Release();
+        }
+        handler.Get()->Release();
+        return WIN_SetErrorFromHRESULT("WASAPI can't activate requested audio endpoint", ret);
+    }
+
+    // !!! FIXME: the problems in SDL2 that needed this to be synchronous are _probably_ solved by SDL3, and this can block indefinitely if a user prompt is shown to get permission to use a microphone.
+    handler.Get()->WaitForCompletion();  // block here until we have an answer, so this is synchronous to us after all.
+
+    HRESULT activateRes = S_OK;
+    IUnknown *iunknown = nullptr;
+    const HRESULT getActivateRes = async->GetActivateResult(&activateRes, &iunknown);
+    async->Release();
+    if (FAILED(getActivateRes)) {
+        return WIN_SetErrorFromHRESULT("Failed to get WASAPI activate result", getActivateRes);
+    } else if (FAILED(activateRes)) {
+        return WIN_SetErrorFromHRESULT("Failed to activate WASAPI device", activateRes);
+    }
+
+    iunknown->QueryInterface(IID_PPV_ARGS(&device->hidden->client));
+    if (!device->hidden->client) {
+        return SDL_SetError("Failed to query WASAPI client interface");
+    }
+
+    if (WASAPI_PrepDevice(device) == -1) {
+        return -1;
+    }
+
+    return 0;
+}
+
+void WASAPI_PlatformThreadInit(SDL_AudioDevice *device)
+{
+    // !!! FIXME: set this thread to "Pro Audio" priority.
+    SDL_SetThreadPriority(device->iscapture ? SDL_THREAD_PRIORITY_HIGH : SDL_THREAD_PRIORITY_TIME_CRITICAL);
+}
+
+void WASAPI_PlatformThreadDeinit(SDL_AudioDevice *device)
+{
+    // !!! FIXME: set this thread to "Pro Audio" priority.
+}
+
+void WASAPI_PlatformFreeDeviceHandle(SDL_AudioDevice *device)
+{
+    SDL_free(device->handle);
+}
+
+#endif // SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__)

vendor/sdl-3.0.0/src/core/SDL_core_unsupported.c

@@ -0,0 +1,218 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef __LINUX__
+
+DECLSPEC int SDLCALL SDL_LinuxSetThreadPriority(Sint64 threadID, int priority);
+int SDL_LinuxSetThreadPriority(Sint64 threadID, int priority)
+{
+    (void)threadID;
+    (void)priority;
+    return SDL_Unsupported();
+}
+
+DECLSPEC int SDLCALL SDL_LinuxSetThreadPriorityAndPolicy(Sint64 threadID, int sdlPriority, int schedPolicy);
+int SDL_LinuxSetThreadPriorityAndPolicy(Sint64 threadID, int sdlPriority, int schedPolicy)
+{
+    (void)threadID;
+    (void)sdlPriority;
+    (void)schedPolicy;
+    return SDL_Unsupported();
+}
+
+#endif
+
+#ifndef __GDK__
+
+DECLSPEC void SDLCALL SDL_GDKSuspendComplete(void);
+void SDL_GDKSuspendComplete(void)
+{
+    SDL_Unsupported();
+}
+
+DECLSPEC int SDLCALL SDL_GDKGetDefaultUser(void *outUserHandle); /* XUserHandle *outUserHandle */
+int SDL_GDKGetDefaultUser(void *outUserHandle)
+{
+    return SDL_Unsupported();
+}
+
+#endif
+
+#if !(defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__))
+
+DECLSPEC int SDLCALL SDL_RegisterApp(const char *name, Uint32 style, void *hInst);
+int SDL_RegisterApp(const char *name, Uint32 style, void *hInst)
+{
+    (void)name;
+    (void)style;
+    (void)hInst;
+    return SDL_Unsupported();
+}
+
+DECLSPEC void SDLCALL SDL_SetWindowsMessageHook(void *callback, void *userdata); /* SDL_WindowsMessageHook callback */
+void SDL_SetWindowsMessageHook(void *callback, void *userdata)
+{
+    (void)callback;
+    (void)userdata;
+    SDL_Unsupported();
+}
+
+DECLSPEC void SDLCALL SDL_UnregisterApp(void);
+void SDL_UnregisterApp(void)
+{
+    SDL_Unsupported();
+}
+
+#endif
+
+#ifndef __WINRT__
+
+/* Returns SDL_WinRT_DeviceFamily enum */
+DECLSPEC int SDLCALL SDL_WinRTGetDeviceFamily(void);
+int SDL_WinRTGetDeviceFamily()
+{
+    SDL_Unsupported();
+    return 0; /* SDL_WINRT_DEVICEFAMILY_UNKNOWN */
+}
+
+DECLSPEC const wchar_t *SDLCALL SDL_WinRTGetFSPathUNICODE(int pathType); /* SDL_WinRT_Path pathType */
+const wchar_t *SDL_WinRTGetFSPathUNICODE(int pathType)
+{
+    (void)pathType;
+    SDL_Unsupported();
+    return NULL;
+}
+
+DECLSPEC const char *SDLCALL SDL_WinRTGetFSPathUTF8(int pathType); /* SDL_WinRT_Path pathType */
+const char *SDL_WinRTGetFSPathUTF8(int pathType)
+{
+    (void)pathType;
+    SDL_Unsupported();
+    return NULL;
+}
+#endif
+
+#ifndef __ANDROID__
+
+DECLSPEC void SDLCALL SDL_AndroidBackButton(void);
+void SDL_AndroidBackButton()
+{
+    SDL_Unsupported();
+}
+
+DECLSPEC void *SDLCALL SDL_AndroidGetActivity(void);
+void *SDL_AndroidGetActivity()
+{
+    SDL_Unsupported();
+    return NULL;
+}
+
+DECLSPEC const char *SDLCALL SDL_AndroidGetExternalStoragePath(void);
+const char* SDL_AndroidGetExternalStoragePath()
+{
+    SDL_Unsupported();
+    return NULL;
+}
+
+DECLSPEC int SDLCALL SDL_AndroidGetExternalStorageState(Uint32 *state);
+int SDL_AndroidGetExternalStorageState(Uint32 *state)
+{
+    (void)state;
+    return SDL_Unsupported();
+}
+DECLSPEC const char *SDLCALL SDL_AndroidGetInternalStoragePath(void);
+const char *SDL_AndroidGetInternalStoragePath()
+{
+    SDL_Unsupported();
+    return NULL;
+}
+
+DECLSPEC void *SDLCALL SDL_AndroidGetJNIEnv(void);
+void *SDL_AndroidGetJNIEnv()
+{
+    SDL_Unsupported();
+    return NULL;
+}
+
+DECLSPEC SDL_bool SDLCALL SDL_AndroidRequestPermission(const char *permission);
+SDL_bool SDL_AndroidRequestPermission(const char *permission)
+{
+    (void)permission;
+    SDL_Unsupported();
+    return SDL_FALSE;
+}
+
+DECLSPEC int SDLCALL SDL_AndroidSendMessage(Uint32 command, int param);
+int SDL_AndroidSendMessage(Uint32 command, int param)
+{
+    (void)command;
+    (void)param;
+    return SDL_Unsupported();
+}
+
+DECLSPEC int SDLCALL SDL_AndroidShowToast(const char* message, int duration, int gravity, int xoffset, int yoffset);
+int SDL_AndroidShowToast(const char* message, int duration, int gravity, int xoffset, int yoffset)
+{
+    (void)message;
+    (void)duration;
+    (void)gravity;
+    (void)xoffset;
+    (void)yoffset;
+    return SDL_Unsupported();
+}
+
+DECLSPEC int SDLCALL SDL_GetAndroidSDKVersion(void);
+int SDL_GetAndroidSDKVersion()
+{
+    return SDL_Unsupported();
+}
+
+DECLSPEC SDL_bool SDLCALL SDL_IsAndroidTV(void);
+SDL_bool SDL_IsAndroidTV()
+{
+    SDL_Unsupported();
+    return SDL_FALSE;
+}
+
+DECLSPEC SDL_bool SDLCALL SDL_IsChromebook(void);
+SDL_bool SDL_IsChromebook()
+{
+    SDL_Unsupported();
+    return SDL_FALSE;
+}
+
+DECLSPEC SDL_bool SDLCALL SDL_IsDeXMode(void);
+SDL_bool SDL_IsDeXMode(void)
+{
+    SDL_Unsupported();
+    return SDL_FALSE;
+}
+
+DECLSPEC Sint32 SDLCALL JNI_OnLoad(void *vm, void *reserved);
+Sint32 JNI_OnLoad(void *vm, void *reserved)
+{
+    (void)vm;
+    (void)reserved;
+    SDL_Unsupported();
+    return -1; /* JNI_ERR */
+}
+#endif

vendor/sdl-3.0.0/src/core/SDL_runapp.c

@@ -0,0 +1,45 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* Most platforms that use/need SDL_main have their own SDL_RunApp() implementation.
+ * If not, you can special case it here by appending || defined(__YOUR_PLATFORM__) */
+#if ( !defined(SDL_MAIN_NEEDED) && !defined(SDL_MAIN_AVAILABLE) ) || defined(__ANDROID__)
+
+DECLSPEC int
+SDL_RunApp(int argc, char* argv[], SDL_main_func mainFunction, void * reserved)
+{
+    char empty[1] = {0};
+    char* argvdummy[2] = { empty, NULL };
+
+    (void)reserved;
+
+    if(argv == NULL)
+    {
+        argc = 0;
+        /* make sure argv isn't NULL, in case some user code doesn't like that */
+        argv = argvdummy;
+    }
+
+    return mainFunction(argc, argv);
+}
+
+#endif

vendor/sdl-3.0.0/src/core/android/SDL_android.h

@@ -0,0 +1,152 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
+#include <EGL/eglplatform.h>
+#include <android/native_window_jni.h>
+
+#include "../../audio/SDL_sysaudio.h"
+
+// this appears to be broken right now (on Android, not SDL, I think...?).
+#define ALLOW_MULTIPLE_ANDROID_AUDIO_DEVICES 0
+
+/* Interface from the SDL library into the Android Java activity */
+extern void Android_JNI_SetActivityTitle(const char *title);
+extern void Android_JNI_SetWindowStyle(SDL_bool fullscreen);
+extern void Android_JNI_SetOrientation(int w, int h, int resizable, const char *hint);
+extern void Android_JNI_MinizeWindow(void);
+extern SDL_bool Android_JNI_ShouldMinimizeOnFocusLoss(void);
+
+extern SDL_bool Android_JNI_GetAccelerometerValues(float values[3]);
+extern void Android_JNI_ShowTextInput(SDL_Rect *inputRect);
+extern void Android_JNI_HideTextInput(void);
+extern SDL_bool Android_JNI_IsScreenKeyboardShown(void);
+extern ANativeWindow *Android_JNI_GetNativeWindow(void);
+
+extern SDL_DisplayOrientation Android_JNI_GetDisplayNaturalOrientation(void);
+extern SDL_DisplayOrientation Android_JNI_GetDisplayCurrentOrientation(void);
+
+/* Audio support */
+void Android_StartAudioHotplug(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture);
+void Android_StopAudioHotplug(void);
+extern void Android_AudioThreadInit(SDL_AudioDevice *device);
+extern int Android_JNI_OpenAudioDevice(SDL_AudioDevice *device);
+extern void *Android_JNI_GetAudioBuffer(void);
+extern void Android_JNI_WriteAudioBuffer(void);
+extern int Android_JNI_CaptureAudioBuffer(void *buffer, int buflen);
+extern void Android_JNI_FlushCapturedAudio(void);
+extern void Android_JNI_CloseAudioDevice(const int iscapture);
+
+/* Detecting device type */
+extern SDL_bool Android_IsDeXMode(void);
+extern SDL_bool Android_IsChromebook(void);
+
+int Android_JNI_FileOpen(SDL_RWops *ctx, const char *fileName, const char *mode);
+Sint64 Android_JNI_FileSize(SDL_RWops *ctx);
+Sint64 Android_JNI_FileSeek(SDL_RWops *ctx, Sint64 offset, int whence);
+size_t Android_JNI_FileRead(SDL_RWops *ctx, void *buffer, size_t size);
+size_t Android_JNI_FileWrite(SDL_RWops *ctx, const void *buffer, size_t size);
+int Android_JNI_FileClose(SDL_RWops *ctx);
+
+/* Environment support */
+void Android_JNI_GetManifestEnvironmentVariables(void);
+
+/* Clipboard support */
+int Android_JNI_SetClipboardText(const char *text);
+char *Android_JNI_GetClipboardText(void);
+SDL_bool Android_JNI_HasClipboardText(void);
+
+/* Power support */
+int Android_JNI_GetPowerInfo(int *plugged, int *charged, int *battery, int *seconds, int *percent);
+
+/* Joystick support */
+void Android_JNI_PollInputDevices(void);
+
+/* Haptic support */
+void Android_JNI_PollHapticDevices(void);
+void Android_JNI_HapticRun(int device_id, float intensity, int length);
+void Android_JNI_HapticStop(int device_id);
+
+/* Video */
+int Android_JNI_SuspendScreenSaver(SDL_bool suspend);
+
+/* Touch support */
+void Android_JNI_InitTouch(void);
+
+/* Threads */
+#include <jni.h>
+JNIEnv *Android_JNI_GetEnv(void);
+int Android_JNI_SetupThread(void);
+
+/* Locale */
+int Android_JNI_GetLocale(char *buf, size_t buflen);
+
+/* Generic messages */
+int Android_JNI_SendMessage(int command, int param);
+
+/* Init */
+JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv *mEnv, jclass cls);
+
+/* MessageBox */
+int Android_JNI_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);
+
+/* Cursor support */
+int Android_JNI_CreateCustomCursor(SDL_Surface *surface, int hot_x, int hot_y);
+void Android_JNI_DestroyCustomCursor(int cursorID);
+SDL_bool Android_JNI_SetCustomCursor(int cursorID);
+SDL_bool Android_JNI_SetSystemCursor(int cursorID);
+
+/* Relative mouse support */
+SDL_bool Android_JNI_SupportsRelativeMouse(void);
+SDL_bool Android_JNI_SetRelativeMouseEnabled(SDL_bool enabled);
+
+/* Request permission */
+SDL_bool Android_JNI_RequestPermission(const char *permission);
+
+/* Show toast notification */
+int Android_JNI_ShowToast(const char *message, int duration, int gravity, int xOffset, int yOffset);
+
+int Android_JNI_OpenURL(const char *url);
+
+int SDL_GetAndroidSDKVersion(void);
+
+SDL_bool SDL_IsAndroidTablet(void);
+SDL_bool SDL_IsAndroidTV(void);
+SDL_bool SDL_IsChromebook(void);
+SDL_bool SDL_IsDeXMode(void);
+
+void Android_ActivityMutex_Lock(void);
+void Android_ActivityMutex_Unlock(void);
+void Android_ActivityMutex_Lock_Running(void);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif

vendor/sdl-3.0.0/src/core/freebsd/SDL_evdev_kbd_default_keyaccmap.h

@@ -0,0 +1,167 @@
+#include <sys/kbio.h>
+
+/* *INDENT-OFF* */ /* clang-format off */
+/*
+ * Automatically generated from /usr/share/vt/keymaps/us.acc.kbd.
+ * DO NOT EDIT!
+ */
+static keymap_t keymap_default_us_acc = { 0x6d, {
+/*                                                         alt
+ * scan                       cntrl          alt    alt   cntrl
+ * code  base   shift  cntrl  shift   alt   shift  cntrl  shift    spcl flgs
+ * ---------------------------------------------------------------------------
+ */
+/*00*/{{  NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP, }, 0xFF,0x00 },
+/*01*/{{ 0x1B,  0x1B,  0x1B,  0x1B,  0x1B,  0x1B,   DBG,   DBG, }, 0x03,0x00 },
+/*02*/{{  '1',   '!',   NOP,   NOP,   '1',   '!',   NOP,   NOP, }, 0x33,0x00 },
+/*03*/{{  '2',   '@',  0x00,  0x00,   '2',   '@',  0x00,  0x00, }, 0x00,0x00 },
+/*04*/{{  '3',   '#',   NOP,   NOP,   '3',   '#',   NOP,   NOP, }, 0x33,0x00 },
+/*05*/{{  '4',   '$',   NOP,   NOP,   '4',   '$',   NOP,   NOP, }, 0x33,0x00 },
+/*06*/{{  '5',   '%',   NOP,   NOP,   '5',   '%',   NOP,   NOP, }, 0x33,0x00 },
+/*07*/{{  '6',   '^',  0x1E,  0x1E,   '6',  DCIR,  0x1E,  0x1E, }, 0x04,0x00 },
+/*08*/{{  '7',   '&',   NOP,   NOP,   '7',   '&',   NOP,   NOP, }, 0x33,0x00 },
+/*09*/{{  '8',   '*',   NOP,   NOP,   '8',  DRIN,   NOP,   NOP, }, 0x37,0x00 },
+/*0a*/{{  '9',   '(',   NOP,   NOP,   '9',   '(',   NOP,   NOP, }, 0x33,0x00 },
+/*0b*/{{  '0',   ')',   NOP,   NOP,   '0',   ')',   NOP,   NOP, }, 0x33,0x00 },
+/*0c*/{{  '-',   '_',  0x1F,  0x1F,   '-',   '_',  0x1F,  0x1F, }, 0x00,0x00 },
+/*0d*/{{  '=',   '+',   NOP,   NOP,   '=',   '+',   NOP,   NOP, }, 0x33,0x00 },
+/*0e*/{{ 0x08,  0x08,  0x7F,  0x7F,  0x08,  0x08,  0x7F,  0x7F, }, 0x00,0x00 },
+/*0f*/{{ 0x09,  BTAB,  NEXT,  NEXT,  0x09,  BTAB,   NOP,   NOP, }, 0x77,0x00 },
+/*10*/{{  'q',   'Q',  0x11,  0x11,   'q',   'Q',  0x11,  0x11, }, 0x00,0x01 },
+/*11*/{{  'w',   'W',  0x17,  0x17,   'w',   'W',  0x17,  0x17, }, 0x00,0x01 },
+/*12*/{{  'e',   'E',  0x05,  0x05,   'e',   'E',  0x05,  0x05, }, 0x00,0x01 },
+/*13*/{{  'r',   'R',  0x12,  0x12,   'r',   'R',  0x12,  0x12, }, 0x00,0x01 },
+/*14*/{{  't',   'T',  0x14,  0x14,   't',   'T',  0x14,  0x14, }, 0x00,0x01 },
+/*15*/{{  'y',   'Y',  0x19,  0x19,   'y',   'Y',  0x19,  0x19, }, 0x00,0x01 },
+/*16*/{{  'u',   'U',  0x15,  0x15,   'u',   'U',  0x15,  0x15, }, 0x00,0x01 },
+/*17*/{{  'i',   'I',  0x09,  0x09,   'i',   'I',  0x09,  0x09, }, 0x00,0x01 },
+/*18*/{{  'o',   'O',  0x0F,  0x0F,   'o',   'O',  0x0F,  0x0F, }, 0x00,0x01 },
+/*19*/{{  'p',   'P',  0x10,  0x10,   'p',   'P',  0x10,  0x10, }, 0x00,0x01 },
+/*1a*/{{  '[',   '{',  0x1B,  0x1B,   '[',   '{',  0x1B,  0x1B, }, 0x00,0x00 },
+/*1b*/{{  ']',   '}',  0x1D,  0x1D,   ']',   '}',  0x1D,  0x1D, }, 0x00,0x00 },
+/*1c*/{{ 0x0D,  0x0D,  0x0A,  0x0A,  0x0D,  0x0D,  0x0A,  0x0A, }, 0x00,0x00 },
+/*1d*/{{ LCTR,  LCTR,  LCTR,  LCTR,  LCTR,  LCTR,  LCTR,  LCTR, }, 0xFF,0x00 },
+/*1e*/{{  'a',   'A',  0x01,  0x01,   'a',   'A',  0x01,  0x01, }, 0x00,0x01 },
+/*1f*/{{  's',   'S',  0x13,  0x13,   's',   'S',  0x13,  0x13, }, 0x00,0x01 },
+/*20*/{{  'd',   'D',  0x04,  0x04,   'd',   'D',  0x04,  0x04, }, 0x00,0x01 },
+/*21*/{{  'f',   'F',  0x06,  0x06,   'f',   'F',  0x06,  0x06, }, 0x00,0x01 },
+/*22*/{{  'g',   'G',  0x07,  0x07,   'g',   'G',  0x07,  0x07, }, 0x00,0x01 },
+/*23*/{{  'h',   'H',  0x08,  0x08,   'h',   'H',  0x08,  0x08, }, 0x00,0x01 },
+/*24*/{{  'j',   'J',  0x0A,  0x0A,   'j',   'J',  0x0A,  0x0A, }, 0x00,0x01 },
+/*25*/{{  'k',   'K',  0x0B,  0x0B,   'k',   'K',  0x0B,  0x0B, }, 0x00,0x01 },
+/*26*/{{  'l',   'L',  0x0C,  0x0C,   'l',   'L',  0x0C,  0x0C, }, 0x00,0x01 },
+/*27*/{{  ';',   ':',   NOP,   NOP,   ';',   ':',   NOP,   NOP, }, 0x33,0x00 },
+/*28*/{{ '\'',   '"',   NOP,   NOP,  DACU,  DUML,   NOP,   NOP, }, 0x3F,0x00 },
+/*29*/{{  '`',   '~',   NOP,   NOP,  DGRA,  DTIL,   NOP,   NOP, }, 0x3F,0x00 },
+/*2a*/{{  LSH,   LSH,   LSH,   LSH,   LSH,   LSH,   LSH,   LSH, }, 0xFF,0x00 },
+/*2b*/{{ '\\',   '|',  0x1C,  0x1C,  '\\',   '|',  0x1C,  0x1C, }, 0x00,0x00 },
+/*2c*/{{  'z',   'Z',  0x1A,  0x1A,   'z',   'Z',  0x1A,  0x1A, }, 0x00,0x01 },
+/*2d*/{{  'x',   'X',  0x18,  0x18,   'x',   'X',  0x18,  0x18, }, 0x00,0x01 },
+/*2e*/{{  'c',   'C',  0x03,  0x03,   'c',   'C',  0x03,  0x03, }, 0x00,0x01 },
+/*2f*/{{  'v',   'V',  0x16,  0x16,   'v',   'V',  0x16,  0x16, }, 0x00,0x01 },
+/*30*/{{  'b',   'B',  0x02,  0x02,   'b',   'B',  0x02,  0x02, }, 0x00,0x01 },
+/*31*/{{  'n',   'N',  0x0E,  0x0E,   'n',   'N',  0x0E,  0x0E, }, 0x00,0x01 },
+/*32*/{{  'm',   'M',  0x0D,  0x0D,   'm',   'M',  0x0D,  0x0D, }, 0x00,0x01 },
+/*33*/{{  ',',   '<',   NOP,   NOP,  DCED,   '<',   NOP,   NOP, }, 0x3B,0x00 },
+/*34*/{{  '.',   '>',   NOP,   NOP,   '.',   '>',   NOP,   NOP, }, 0x33,0x00 },
+/*35*/{{  '/',   '?',   NOP,   NOP,   '/',   '?',   NOP,   NOP, }, 0x33,0x00 },
+/*36*/{{  RSH,   RSH,   RSH,   RSH,   RSH,   RSH,   RSH,   RSH, }, 0xFF,0x00 },
+/*37*/{{  '*',   '*',   '*',   '*',   '*',   '*',   '*',   '*', }, 0x00,0x00 },
+/*38*/{{ LALT,  LALT,  LALT,  LALT,  LALT,  LALT,  LALT,  LALT, }, 0xFF,0x00 },
+/*39*/{{  ' ',   ' ',  0x00,  0x00,   ' ',   ' ',  SUSP,  SUSP, }, 0x03,0x00 },
+/*3a*/{{  CLK,   CLK,   CLK,   CLK,   CLK,   CLK,   CLK,   CLK, }, 0xFF,0x00 },
+/*3b*/{{ F( 1), F(13), F(25), F(37), S( 1), S(11), S( 1), S(11),}, 0xFF,0x00 },
+/*3c*/{{ F( 2), F(14), F(26), F(38), S( 2), S(12), S( 2), S(12),}, 0xFF,0x00 },
+/*3d*/{{ F( 3), F(15), F(27), F(39), S( 3), S(13), S( 3), S(13),}, 0xFF,0x00 },
+/*3e*/{{ F( 4), F(16), F(28), F(40), S( 4), S(14), S( 4), S(14),}, 0xFF,0x00 },
+/*3f*/{{ F( 5), F(17), F(29), F(41), S( 5), S(15), S( 5), S(15),}, 0xFF,0x00 },
+/*40*/{{ F( 6), F(18), F(30), F(42), S( 6), S(16), S( 6), S(16),}, 0xFF,0x00 },
+/*41*/{{ F( 7), F(19), F(31), F(43), S( 7), S( 7), S( 7), S( 7),}, 0xFF,0x00 },
+/*42*/{{ F( 8), F(20), F(32), F(44), S( 8), S( 8), S( 8), S( 8),}, 0xFF,0x00 },
+/*43*/{{ F( 9), F(21), F(33), F(45), S( 9), S( 9), S( 9), S( 9),}, 0xFF,0x00 },
+/*44*/{{ F(10), F(22), F(34), F(46), S(10), S(10), S(10), S(10),}, 0xFF,0x00 },
+/*45*/{{  NLK,   NLK,   NLK,   NLK,   NLK,   NLK,   NLK,   NLK, }, 0xFF,0x00 },
+/*46*/{{  SLK,   SLK,   SLK,   SLK,   SLK,   SLK,   SLK,   SLK, }, 0xFF,0x00 },
+/*47*/{{ F(49),  '7',   '7',   '7',   '7',   '7',   '7',   '7', }, 0x80,0x02 },
+/*48*/{{ F(50),  '8',   '8',   '8',   '8',   '8',   '8',   '8', }, 0x80,0x02 },
+/*49*/{{ F(51),  '9',   '9',   '9',   '9',   '9',   '9',   '9', }, 0x80,0x02 },
+/*4a*/{{ F(52),  '-',   '-',   '-',   '-',   '-',   '-',   '-', }, 0x80,0x02 },
+/*4b*/{{ F(53),  '4',   '4',   '4',   '4',   '4',   '4',   '4', }, 0x80,0x02 },
+/*4c*/{{ F(54),  '5',   '5',   '5',   '5',   '5',   '5',   '5', }, 0x80,0x02 },
+/*4d*/{{ F(55),  '6',   '6',   '6',   '6',   '6',   '6',   '6', }, 0x80,0x02 },
+/*4e*/{{ F(56),  '+',   '+',   '+',   '+',   '+',   '+',   '+', }, 0x80,0x02 },
+/*4f*/{{ F(57),  '1',   '1',   '1',   '1',   '1',   '1',   '1', }, 0x80,0x02 },
+/*50*/{{ F(58),  '2',   '2',   '2',   '2',   '2',   '2',   '2', }, 0x80,0x02 },
+/*51*/{{ F(59),  '3',   '3',   '3',   '3',   '3',   '3',   '3', }, 0x80,0x02 },
+/*52*/{{ F(60),  '0',   '0',   '0',   '0',   '0',   '0',   '0', }, 0x80,0x02 },
+/*53*/{{ 0x7F,   '.',   '.',   '.',   '.',   '.',   RBT,   RBT, }, 0x03,0x02 },
+/*54*/{{  NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP, }, 0xFF,0x00 },
+/*55*/{{  NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP, }, 0xFF,0x00 },
+/*56*/{{  NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP, }, 0xFF,0x00 },
+/*57*/{{ F(11), F(23), F(35), F(47), S(11), S(11), S(11), S(11),}, 0xFF,0x00 },
+/*58*/{{ F(12), F(24), F(36), F(48), S(12), S(12), S(12), S(12),}, 0xFF,0x00 },
+/*59*/{{ 0x0D,  0x0D,  0x0A,  0x0A,  0x0D,  0x0D,  0x0A,  0x0A, }, 0x00,0x00 },
+/*5a*/{{ RCTR,  RCTR,  RCTR,  RCTR,  RCTR,  RCTR,  RCTR,  RCTR, }, 0xFF,0x00 },
+/*5b*/{{  '/',   '/',   '/',   '/',   '/',   '/',   '/',   '/', }, 0x00,0x02 },
+/*5c*/{{ NEXT,  NEXT,   NOP,   NOP,   DBG,   DBG,   DBG,   DBG, }, 0xFF,0x00 },
+/*5d*/{{ RALT,  RALT,  RALT,  RALT,  RALT,  RALT,  RALT,  RALT, }, 0xFF,0x00 },
+/*5e*/{{ F(49), F(49), F(49), F(49), F(49), F(49), F(49), F(49),}, 0xFF,0x00 },
+/*5f*/{{ F(50), F(50), F(50), F(50), F(50), F(50), F(50), F(50),}, 0xFF,0x00 },
+/*60*/{{ F(51), F(51), F(51), F(51), F(51), F(51), F(51), F(51),}, 0xFF,0x00 },
+/*61*/{{ F(53), F(53), F(53), F(53), F(53), F(53), F(53), F(53),}, 0xFF,0x00 },
+/*62*/{{ F(55), F(55), F(55), F(55), F(55), F(55), F(55), F(55),}, 0xFF,0x00 },
+/*63*/{{ F(57), F(57), F(57), F(57), F(57), F(57), F(57), F(57),}, 0xFF,0x00 },
+/*64*/{{ F(58), F(58), F(58), F(58), F(58), F(58), F(58), F(58),}, 0xFF,0x00 },
+/*65*/{{ F(59), F(59), F(59), F(59), F(59), F(59), F(59), F(59),}, 0xFF,0x00 },
+/*66*/{{ F(60), F(60), F(60), F(60), F(60), F(60), F(60), F(60),}, 0xFF,0x00 },
+/*67*/{{ F(61), F(61), F(61), F(61), F(61), F(61),  RBT,  F(61),}, 0xFF,0x00 },
+/*68*/{{ SPSC,  SPSC,  SUSP,  SUSP,   NOP,   NOP,  SUSP,  SUSP, }, 0xFF,0x00 },
+/*69*/{{ F(62), F(62), F(62), F(62), F(62), F(62), F(62), F(62),}, 0xFF,0x00 },
+/*6a*/{{ F(63), F(63), F(63), F(63), F(63), F(63), F(63), F(63),}, 0xFF,0x00 },
+/*6b*/{{ F(64), F(64), F(64), F(64), F(64), F(64), F(64), F(64),}, 0xFF,0x00 },
+/*6c*/{{  NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP,   NOP, }, 0xFF,0x00 },
+} };
+
+static accentmap_t accentmap_default_us_acc = { 11, {
+    /* dgra=0 */
+    {  '`', { {  'a',0xe0 }, {  'A',0xc0 }, {  'e',0xe8 }, {  'E',0xc8 },
+	      {  'i',0xec }, {  'I',0xcc }, {  'o',0xf2 }, {  'O',0xd2 },
+	      {  'u',0xf9 }, {  'U',0xd9 }, }, },
+    /* dacu=1 */
+    { 0xb4, { {  'a',0xe1 }, {  'A',0xc1 }, {  'e',0xe9 }, {  'E',0xc9 },
+	      {  'i',0xed }, {  'I',0xcd }, {  'o',0xf3 }, {  'O',0xd3 },
+	      {  'u',0xfa }, {  'U',0xda }, {  'y',0xfd }, {  'Y',0xdd }, }, },
+    /* dcir=2 */
+    {  '^', { {  'a',0xe2 }, {  'A',0xc2 }, {  'e',0xea }, {  'E',0xca },
+	      {  'i',0xee }, {  'I',0xce }, {  'o',0xf4 }, {  'O',0xd4 },
+	      {  'u',0xfb }, {  'U',0xdb }, }, },
+    /* dtil=3 */
+    {  '~', { {  'a',0xe3 }, {  'A',0xc3 }, {  'n',0xf1 }, {  'N',0xd1 },
+	      {  'o',0xf5 }, {  'O',0xd5 }, }, },
+    /* dmac=4 */
+    { 0x00 }, 
+    /* dbre=5 */
+    { 0x00 }, 
+    /* ddot=6 */
+    { 0x00 }, 
+    /* duml=7 */
+    { 0xa8, { {  'a',0xe4 }, {  'A',0xc4 }, {  'e',0xeb }, {  'E',0xcb },
+	      {  'i',0xef }, {  'I',0xcf }, {  'o',0xf6 }, {  'O',0xd6 },
+	      {  'u',0xfc }, {  'U',0xdc }, {  'y',0xff }, }, },
+    /* dsla=8 */
+    { 0x00 }, 
+    /* drin=9 */
+    { 0xb0, { {  'a',0xe5 }, {  'A',0xc5 }, }, },
+    /* dced=10 */
+    { 0xb8, { {  'c',0xe7 }, {  'C',0xc7 }, }, },
+    /* dapo=11 */
+    { 0x00 }, 
+    /* ddac=12 */
+    { 0x00 }, 
+    /* dogo=13 */
+    { 0x00 }, 
+    /* dcar=14 */
+    { 0x00 }, 
+} };
+
+/* *INDENT-ON* */ /* clang-format on */

vendor/sdl-3.0.0/src/core/freebsd/SDL_evdev_kbd_freebsd.c

@@ -0,0 +1,598 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#include "../linux/SDL_evdev_kbd.h"
+
+#ifdef SDL_INPUT_FBSDKBIO
+
+/* This logic is adapted from drivers/tty/vt/keyboard.c in the Linux kernel source, slightly modified to work with FreeBSD */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/kbio.h>
+#include <sys/consio.h>
+
+#include <signal.h>
+
+#include "../../events/SDL_events_c.h"
+#include "SDL_evdev_kbd_default_keyaccmap.h"
+
+typedef void(fn_handler_fn)(SDL_EVDEV_keyboard_state *kbd);
+
+/*
+ * Keyboard State
+ */
+
+struct SDL_EVDEV_keyboard_state
+{
+    int console_fd;
+    int keyboard_fd;
+    unsigned long old_kbd_mode;
+    unsigned short **key_maps;
+    keymap_t *key_map;
+    keyboard_info_t *kbInfo;
+    unsigned char shift_down[4]; /* shift state counters.. */
+    SDL_bool dead_key_next;
+    int npadch; /* -1 or number assembled on pad */
+    accentmap_t *accents;
+    unsigned int diacr;
+    SDL_bool rep; /* flag telling character repeat */
+    unsigned char lockstate;
+    unsigned char ledflagstate;
+    char shift_state;
+    char text[128];
+    unsigned int text_len;
+};
+
+static int SDL_EVDEV_kbd_load_keymaps(SDL_EVDEV_keyboard_state *kbd)
+{
+    return ioctl(kbd->keyboard_fd, GIO_KEYMAP, kbd->key_map) >= 0;
+}
+
+static SDL_EVDEV_keyboard_state *kbd_cleanup_state = NULL;
+static int kbd_cleanup_sigactions_installed = 0;
+static int kbd_cleanup_atexit_installed = 0;
+
+static struct sigaction old_sigaction[NSIG];
+
+static int fatal_signals[] = {
+    /* Handlers for SIGTERM and SIGINT are installed in SDL_InitQuit. */
+    SIGHUP, SIGQUIT, SIGILL, SIGABRT,
+    SIGFPE, SIGSEGV, SIGPIPE, SIGBUS,
+    SIGSYS
+};
+
+static void kbd_cleanup(void)
+{
+    struct mouse_info mData;
+    SDL_EVDEV_keyboard_state *kbd = kbd_cleanup_state;
+    if (kbd == NULL) {
+        return;
+    }
+    kbd_cleanup_state = NULL;
+    SDL_zero(mData);
+    mData.operation = MOUSE_SHOW;
+    ioctl(kbd->keyboard_fd, KDSKBMODE, kbd->old_kbd_mode);
+    if (kbd->keyboard_fd != kbd->console_fd) {
+        close(kbd->keyboard_fd);
+    }
+    ioctl(kbd->console_fd, CONS_SETKBD, (unsigned long)(kbd->kbInfo->kb_index));
+    ioctl(kbd->console_fd, CONS_MOUSECTL, &mData);
+}
+
+void SDL_EVDEV_kbd_reraise_signal(int sig)
+{
+    raise(sig);
+}
+
+siginfo_t *SDL_EVDEV_kdb_cleanup_siginfo = NULL;
+void *SDL_EVDEV_kdb_cleanup_ucontext = NULL;
+
+static void kbd_cleanup_signal_action(int signum, siginfo_t *info, void *ucontext)
+{
+    struct sigaction *old_action_p = &(old_sigaction[signum]);
+    sigset_t sigset;
+
+    /* Restore original signal handler before going any further. */
+    sigaction(signum, old_action_p, NULL);
+
+    /* Unmask current signal. */
+    sigemptyset(&sigset);
+    sigaddset(&sigset, signum);
+    sigprocmask(SIG_UNBLOCK, &sigset, NULL);
+
+    /* Save original signal info and context for archeologists. */
+    SDL_EVDEV_kdb_cleanup_siginfo = info;
+    SDL_EVDEV_kdb_cleanup_ucontext = ucontext;
+
+    /* Restore keyboard. */
+    kbd_cleanup();
+
+    /* Reraise signal. */
+    SDL_EVDEV_kbd_reraise_signal(signum);
+}
+
+static void kbd_unregister_emerg_cleanup()
+{
+    int tabidx;
+
+    kbd_cleanup_state = NULL;
+
+    if (!kbd_cleanup_sigactions_installed) {
+        return;
+    }
+    kbd_cleanup_sigactions_installed = 0;
+
+    for (tabidx = 0; tabidx < sizeof(fatal_signals) / sizeof(fatal_signals[0]); ++tabidx) {
+        struct sigaction *old_action_p;
+        struct sigaction cur_action;
+        int signum = fatal_signals[tabidx];
+        old_action_p = &(old_sigaction[signum]);
+
+        /* Examine current signal action */
+        if (sigaction(signum, NULL, &cur_action)) {
+            continue;
+        }
+
+        /* Check if action installed and not modified */
+        if (!(cur_action.sa_flags & SA_SIGINFO) || cur_action.sa_sigaction != &kbd_cleanup_signal_action) {
+            continue;
+        }
+
+        /* Restore original action */
+        sigaction(signum, old_action_p, NULL);
+    }
+}
+
+static void kbd_cleanup_atexit(void)
+{
+    /* Restore keyboard. */
+    kbd_cleanup();
+
+    /* Try to restore signal handlers in case shared library is being unloaded */
+    kbd_unregister_emerg_cleanup();
+}
+
+static void kbd_register_emerg_cleanup(SDL_EVDEV_keyboard_state *kbd)
+{
+    int tabidx;
+
+    if (kbd_cleanup_state != NULL) {
+        return;
+    }
+    kbd_cleanup_state = kbd;
+
+    if (!kbd_cleanup_atexit_installed) {
+        /* Since glibc 2.2.3, atexit() (and on_exit(3)) can be used within a shared library to establish
+         * functions that are called when the shared library is unloaded.
+         * -- man atexit(3)
+         */
+        atexit(kbd_cleanup_atexit);
+        kbd_cleanup_atexit_installed = 1;
+    }
+
+    if (kbd_cleanup_sigactions_installed) {
+        return;
+    }
+    kbd_cleanup_sigactions_installed = 1;
+
+    for (tabidx = 0; tabidx < sizeof(fatal_signals) / sizeof(fatal_signals[0]); ++tabidx) {
+        struct sigaction *old_action_p;
+        struct sigaction new_action;
+        int signum = fatal_signals[tabidx];
+        old_action_p = &(old_sigaction[signum]);
+        if (sigaction(signum, NULL, old_action_p)) {
+            continue;
+        }
+
+        /* Skip SIGHUP and SIGPIPE if handler is already installed
+         * - assume the handler will do the cleanup
+         */
+        if ((signum == SIGHUP || signum == SIGPIPE) && (old_action_p->sa_handler != SIG_DFL || (void (*)(int))old_action_p->sa_sigaction != SIG_DFL)) {
+            continue;
+        }
+
+        new_action = *old_action_p;
+        new_action.sa_flags |= SA_SIGINFO;
+        new_action.sa_sigaction = &kbd_cleanup_signal_action;
+        sigaction(signum, &new_action, NULL);
+    }
+}
+
+SDL_EVDEV_keyboard_state *SDL_EVDEV_kbd_init(void)
+{
+    SDL_EVDEV_keyboard_state *kbd;
+    struct mouse_info mData;
+    char flag_state;
+    char *devicePath;
+
+    SDL_zero(mData);
+    mData.operation = MOUSE_HIDE;
+    kbd = (SDL_EVDEV_keyboard_state *)SDL_calloc(1, sizeof(SDL_EVDEV_keyboard_state));
+    if (kbd == NULL) {
+        return NULL;
+    }
+
+    kbd->npadch = -1;
+
+    /* This might fail if we're not connected to a tty (e.g. on the Steam Link) */
+    kbd->keyboard_fd = kbd->console_fd = open("/dev/tty", O_RDONLY | O_CLOEXEC);
+
+    kbd->shift_state = 0;
+
+    kbd->accents = SDL_calloc(sizeof(accentmap_t), 1);
+    kbd->key_map = SDL_calloc(sizeof(keymap_t), 1);
+    kbd->kbInfo = SDL_calloc(sizeof(keyboard_info_t), 1);
+
+    ioctl(kbd->console_fd, KDGKBINFO, kbd->kbInfo);
+    ioctl(kbd->console_fd, CONS_MOUSECTL, &mData);
+
+    if (ioctl(kbd->console_fd, KDGKBSTATE, &flag_state) == 0) {
+        kbd->ledflagstate = flag_state;
+    }
+
+    if (ioctl(kbd->console_fd, GIO_DEADKEYMAP, kbd->accents) < 0) {
+        SDL_free(kbd->accents);
+        kbd->accents = &accentmap_default_us_acc;
+    }
+
+    if (ioctl(kbd->console_fd, KDGKBMODE, &kbd->old_kbd_mode) == 0) {
+        /* Set the keyboard in XLATE mode and load the keymaps */
+        ioctl(kbd->console_fd, KDSKBMODE, (unsigned long)(K_XLATE));
+        if (!SDL_EVDEV_kbd_load_keymaps(kbd)) {
+            SDL_free(kbd->key_map);
+            kbd->key_map = &keymap_default_us_acc;
+        }
+        /* Allow inhibiting keyboard mute with env. variable for debugging etc. */
+        if (SDL_getenv("SDL_INPUT_FREEBSD_KEEP_KBD") == NULL) {
+            /* Take keyboard from console and open the actual keyboard device.
+             * Ensures that the keystrokes do not leak through to the console.
+             */
+            ioctl(kbd->console_fd, CONS_RELKBD, 1ul);
+            SDL_asprintf(&devicePath, "/dev/kbd%d", kbd->kbInfo->kb_index);
+            kbd->keyboard_fd = open(devicePath, O_WRONLY | O_CLOEXEC);
+            if (kbd->keyboard_fd == -1) {
+                // Give keyboard back.
+                ioctl(kbd->console_fd, CONS_SETKBD, (unsigned long)(kbd->kbInfo->kb_index));
+                kbd->keyboard_fd = kbd->console_fd;
+            }
+
+            /* Make sure to restore keyboard if application fails to call
+             * SDL_Quit before exit or fatal signal is raised.
+             */
+            if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
+                kbd_register_emerg_cleanup(kbd);
+            }
+            SDL_free(devicePath);
+        } else
+            kbd->keyboard_fd = kbd->console_fd;
+    }
+
+    return kbd;
+}
+
+void SDL_EVDEV_kbd_quit(SDL_EVDEV_keyboard_state *kbd)
+{
+    struct mouse_info mData;
+
+    if (kbd == NULL) {
+        return;
+    }
+    SDL_zero(mData);
+    mData.operation = MOUSE_SHOW;
+    ioctl(kbd->console_fd, CONS_MOUSECTL, &mData);
+
+    kbd_unregister_emerg_cleanup();
+
+    if (kbd->keyboard_fd >= 0) {
+        /* Restore the original keyboard mode */
+        ioctl(kbd->keyboard_fd, KDSKBMODE, kbd->old_kbd_mode);
+
+        close(kbd->keyboard_fd);
+        if (kbd->console_fd != kbd->keyboard_fd && kbd->console_fd >= 0) {
+            // Give back keyboard.
+            ioctl(kbd->console_fd, CONS_SETKBD, (unsigned long)(kbd->kbInfo->kb_index));
+        }
+        kbd->console_fd = kbd->keyboard_fd = -1;
+    }
+
+    SDL_free(kbd);
+}
+
+/*
+ * Helper Functions.
+ */
+static void put_queue(SDL_EVDEV_keyboard_state *kbd, uint c)
+{
+    /* c is already part of a UTF-8 sequence and safe to add as a character */
+    if (kbd->text_len < (sizeof(kbd->text) - 1)) {
+        kbd->text[kbd->text_len++] = (char)c;
+    }
+}
+
+static void put_utf8(SDL_EVDEV_keyboard_state *kbd, uint c)
+{
+    if (c < 0x80)
+        /*  0******* */
+        put_queue(kbd, c);
+    else if (c < 0x800) {
+        /* 110***** 10****** */
+        put_queue(kbd, 0xc0 | (c >> 6));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    } else if (c < 0x10000) {
+        if (c >= 0xD800 && c < 0xE000) {
+            return;
+        }
+        if (c == 0xFFFF) {
+            return;
+        }
+        /* 1110**** 10****** 10****** */
+        put_queue(kbd, 0xe0 | (c >> 12));
+        put_queue(kbd, 0x80 | ((c >> 6) & 0x3f));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    } else if (c < 0x110000) {
+        /* 11110*** 10****** 10****** 10****** */
+        put_queue(kbd, 0xf0 | (c >> 18));
+        put_queue(kbd, 0x80 | ((c >> 12) & 0x3f));
+        put_queue(kbd, 0x80 | ((c >> 6) & 0x3f));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    }
+}
+
+/*
+ * We have a combining character DIACR here, followed by the character CH.
+ * If the combination occurs in the table, return the corresponding value.
+ * Otherwise, if CH is a space or equals DIACR, return DIACR.
+ * Otherwise, conclude that DIACR was not combining after all,
+ * queue it and return CH.
+ */
+static unsigned int handle_diacr(SDL_EVDEV_keyboard_state *kbd, unsigned int ch)
+{
+    unsigned int d = kbd->diacr;
+    unsigned int i, j;
+
+    kbd->diacr = 0;
+
+    for (i = 0; i < kbd->accents->n_accs; i++) {
+        if (kbd->accents->acc[i].accchar == d) {
+            for (j = 0; j < NUM_ACCENTCHARS; ++j) {
+                if (kbd->accents->acc[i].map[j][0] == 0) { /* end of table */
+                    break;
+                }
+                if (kbd->accents->acc[i].map[j][0] == ch) {
+                    return kbd->accents->acc[i].map[j][1];
+                }
+            }
+        }
+    }
+
+    if (ch == ' ' || ch == d) {
+        put_utf8(kbd, d);
+        return 0;
+    }
+    put_utf8(kbd, d);
+
+    return ch;
+}
+
+static int vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    return (kbd->ledflagstate & flag) != 0;
+}
+
+static void chg_vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->ledflagstate ^= flag;
+    ioctl(kbd->keyboard_fd, KDSKBSTATE, (unsigned long)(kbd->ledflagstate));
+}
+
+/*
+ * Special function handlers
+ */
+
+static void k_self(SDL_EVDEV_keyboard_state *kbd, unsigned int value, char up_flag)
+{
+    if (up_flag) {
+        return; /* no action, if this is a key release */
+    }
+
+    if (kbd->diacr) {
+        value = handle_diacr(kbd, value);
+    }
+
+    if (kbd->dead_key_next) {
+        kbd->dead_key_next = SDL_FALSE;
+        kbd->diacr = value;
+        return;
+    }
+    put_utf8(kbd, value);
+}
+
+static void k_deadunicode(SDL_EVDEV_keyboard_state *kbd, unsigned int value, char up_flag)
+{
+    if (up_flag)
+        return;
+
+    kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
+}
+
+static void k_shift(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    int old_state = kbd->shift_state;
+
+    if (kbd->rep)
+        return;
+
+    if (up_flag) {
+        /*
+         * handle the case that two shift or control
+         * keys are depressed simultaneously
+         */
+        if (kbd->shift_down[value]) {
+            kbd->shift_down[value]--;
+        }
+    } else
+        kbd->shift_down[value]++;
+
+    if (kbd->shift_down[value])
+        kbd->shift_state |= (1 << value);
+    else
+        kbd->shift_state &= ~(1 << value);
+
+    /* kludge */
+    if (up_flag && kbd->shift_state != old_state && kbd->npadch != -1) {
+        put_utf8(kbd, kbd->npadch);
+        kbd->npadch = -1;
+    }
+}
+
+void SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *kbd, unsigned int keycode, int down)
+{
+    keymap_t key_map;
+    struct keyent_t keysym;
+    unsigned int final_key_state;
+    unsigned int map_from_key_sym;
+
+    if (kbd == NULL) {
+        return;
+    }
+
+    key_map = *kbd->key_map;
+
+    kbd->rep = (down == 2);
+
+    if (keycode < NUM_KEYS) {
+        if (keycode >= 89 && keycode <= 95) {
+            /* These constitute unprintable language-related keys, so ignore them. */
+            return;
+        }
+        if (keycode > 95) {
+            keycode -= 7;
+        }
+        if (vc_kbd_led(kbd, ALKED) || (kbd->shift_state & 0x8)) {
+            keycode += ALTGR_OFFSET;
+        }
+        keysym = key_map.key[keycode];
+    } else {
+        return;
+    }
+
+    final_key_state = kbd->shift_state & 0x7;
+    if ((keysym.flgs & FLAG_LOCK_C) && vc_kbd_led(kbd, LED_CAP)) {
+        final_key_state ^= 0x1;
+    }
+    if ((keysym.flgs & FLAG_LOCK_N) && vc_kbd_led(kbd, LED_NUM)) {
+        final_key_state ^= 0x1;
+    }
+
+    map_from_key_sym = keysym.map[final_key_state];
+    if ((keysym.spcl & (0x80 >> final_key_state)) || (map_from_key_sym & SPCLKEY)) {
+        /* Special function.*/
+        if (map_from_key_sym == 0)
+            return; /* Nothing to do. */
+        if (map_from_key_sym & SPCLKEY) {
+            map_from_key_sym &= ~SPCLKEY;
+        }
+        if (map_from_key_sym >= F_ACC && map_from_key_sym <= L_ACC) {
+            /* Accent function.*/
+            unsigned int accent_index = map_from_key_sym - F_ACC;
+            if (kbd->accents->acc[accent_index].accchar != 0) {
+                k_deadunicode(kbd, kbd->accents->acc[accent_index].accchar, !down);
+            }
+        } else {
+            switch (map_from_key_sym) {
+            case ASH: /* alt/meta shift */
+                k_shift(kbd, 3, down == 0);
+                break;
+            case LSHA: /* left shift + alt lock */
+            case RSHA: /* right shift + alt lock */
+                if (down == 0) {
+                    chg_vc_kbd_led(kbd, ALKED);
+                }
+            case LSH: /* left shift */
+            case RSH: /* right shift */
+                k_shift(kbd, 0, down == 0);
+                break;
+            case LCTRA: /* left ctrl + alt lock */
+            case RCTRA: /* right ctrl + alt lock */
+                if (down == 0) {
+                    chg_vc_kbd_led(kbd, ALKED);
+                }
+            case LCTR: /* left ctrl */
+            case RCTR: /* right ctrl */
+                k_shift(kbd, 1, down == 0);
+                break;
+            case LALTA: /* left alt + alt lock */
+            case RALTA: /* right alt + alt lock */
+                if (down == 0) {
+                    chg_vc_kbd_led(kbd, ALKED);
+                }
+            case LALT: /* left alt */
+            case RALT: /* right alt */
+                k_shift(kbd, 2, down == 0);
+                break;
+            case ALK: /* alt lock */
+                if (down == 1) {
+                    chg_vc_kbd_led(kbd, ALKED);
+                }
+                break;
+            case CLK: /* caps lock*/
+                if (down == 1) {
+                    chg_vc_kbd_led(kbd, CLKED);
+                }
+                break;
+            case NLK: /* num lock */
+                if (down == 1) {
+                    chg_vc_kbd_led(kbd, NLKED);
+                }
+                break;
+            case SLK: /* scroll lock */
+                if (down == 1) {
+                    chg_vc_kbd_led(kbd, SLKED);
+                }
+                break;
+            default:
+                return;
+            }
+        }
+    } else {
+        if (map_from_key_sym == '\n' || map_from_key_sym == '\r') {
+            if (kbd->diacr) {
+                kbd->diacr = 0;
+                return;
+            }
+        }
+        if (map_from_key_sym >= ' ' && map_from_key_sym != 127) {
+            k_self(kbd, map_from_key_sym, !down);
+        }
+    }
+
+    if (kbd->text_len > 0) {
+        kbd->text[kbd->text_len] = '\0';
+        SDL_SendKeyboardText(kbd->text);
+        kbd->text_len = 0;
+    }
+}
+
+#endif /* SDL_INPUT_FBSDKBIO */

vendor/sdl-3.0.0/src/core/gdk/SDL_gdk.cpp

@@ -0,0 +1,236 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+extern "C" {
+#include "../windows/SDL_windows.h"
+#include "../../events/SDL_events_c.h"
+}
+#include <XGameRuntime.h>
+#include <xsapi-c/services_c.h>
+#include <shellapi.h> /* CommandLineToArgvW() */
+#include <appnotify.h>
+
+static XTaskQueueHandle GDK_GlobalTaskQueue;
+
+PAPPSTATE_REGISTRATION hPLM = {};
+HANDLE plmSuspendComplete = nullptr;
+
+extern "C" DECLSPEC int
+SDL_GDKGetTaskQueue(XTaskQueueHandle *outTaskQueue)
+{
+    /* If this is the first call, first create the global task queue. */
+    if (!GDK_GlobalTaskQueue) {
+        HRESULT hr;
+
+        hr = XTaskQueueCreate(XTaskQueueDispatchMode::ThreadPool,
+                              XTaskQueueDispatchMode::Manual,
+                              &GDK_GlobalTaskQueue);
+        if (FAILED(hr)) {
+            return SDL_SetError("[GDK] Could not create global task queue");
+        }
+
+        /* The initial call gets the non-duplicated handle so they can clean it up */
+        *outTaskQueue = GDK_GlobalTaskQueue;
+    } else {
+        /* Duplicate the global task queue handle into outTaskQueue */
+        if (FAILED(XTaskQueueDuplicateHandle(GDK_GlobalTaskQueue, outTaskQueue))) {
+            return SDL_SetError("[GDK] Unable to acquire global task queue");
+        }
+    }
+
+    return 0;
+}
+
+extern "C" void
+GDK_DispatchTaskQueue(void)
+{
+    /* If there is no global task queue, don't do anything.
+     * This gives the option to opt-out for those who want to handle everything themselves.
+     */
+    if (GDK_GlobalTaskQueue) {
+        /* Dispatch any callbacks which are ready. */
+        while (XTaskQueueDispatch(GDK_GlobalTaskQueue, XTaskQueuePort::Completion, 0))
+            ;
+    }
+}
+
+/* Pop up an out of memory message, returns to Windows */
+extern "C" static BOOL
+OutOfMemory(void)
+{
+    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal Error", "Out of memory - aborting", NULL);
+    return FALSE;
+}
+
+/* Gets the arguments with GetCommandLine, converts them to argc and argv
+   and calls SDL_main */
+extern "C" DECLSPEC int
+SDL_RunApp(int, char**, SDL_main_func mainFunction, void *reserved)
+{
+    LPWSTR *argvw;
+    char **argv;
+    int i, argc, result;
+    HRESULT hr;
+    XTaskQueueHandle taskQueue;
+
+    argvw = CommandLineToArgvW(GetCommandLineW(), &argc);
+    if (argvw == NULL) {
+        return OutOfMemory();
+    }
+
+    /* Note that we need to be careful about how we allocate/free memory here.
+     * If the application calls SDL_SetMemoryFunctions(), we can't rely on
+     * SDL_free() to use the same allocator after SDL_main() returns.
+     */
+
+    /* Parse it into argv and argc */
+    argv = (char **)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (argc + 1) * sizeof(*argv));
+    if (argv == NULL) {
+        return OutOfMemory();
+    }
+    for (i = 0; i < argc; ++i) {
+        DWORD len;
+        char *arg = WIN_StringToUTF8W(argvw[i]);
+        if (arg == NULL) {
+            return OutOfMemory();
+        }
+        len = (DWORD)SDL_strlen(arg);
+        argv[i] = (char *)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len + 1);
+        if (!argv[i]) {
+            return OutOfMemory();
+        }
+        SDL_memcpy(argv[i], arg, len);
+        SDL_free(arg);
+    }
+    argv[i] = NULL;
+    LocalFree(argvw);
+
+    hr = XGameRuntimeInitialize();
+
+    if (SUCCEEDED(hr) && SDL_GDKGetTaskQueue(&taskQueue) == 0) {
+        Uint32 titleid = 0;
+        char scidBuffer[64];
+        XblInitArgs xblArgs;
+
+        XTaskQueueSetCurrentProcessTaskQueue(taskQueue);
+
+        /* Try to get the title ID and initialize Xbox Live */
+        hr = XGameGetXboxTitleId(&titleid);
+        if (SUCCEEDED(hr)) {
+            SDL_zero(xblArgs);
+            xblArgs.queue = taskQueue;
+            SDL_snprintf(scidBuffer, 64, "00000000-0000-0000-0000-0000%08X", titleid);
+            xblArgs.scid = scidBuffer;
+            hr = XblInitialize(&xblArgs);
+        } else {
+            SDL_SetError("[GDK] Unable to get titleid. Will not call XblInitialize. Check MicrosoftGame.config!");
+        }
+
+        SDL_SetMainReady();
+
+        /* Register suspend/resume handling */
+        plmSuspendComplete = CreateEventEx(nullptr, nullptr, 0, EVENT_MODIFY_STATE | SYNCHRONIZE);
+        if (!plmSuspendComplete) {
+            SDL_SetError("[GDK] Unable to create plmSuspendComplete event");
+            return -1;
+        }
+        auto rascn = [](BOOLEAN quiesced, PVOID context) {
+            SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "[GDK] in RegisterAppStateChangeNotification handler");
+            if (quiesced) {
+                ResetEvent(plmSuspendComplete);
+                SDL_SendAppEvent(SDL_EVENT_DID_ENTER_BACKGROUND);
+
+                // To defer suspension, we must wait to exit this callback.
+                // IMPORTANT: The app must call SDL_GDKSuspendComplete() to release this lock.
+                (void)WaitForSingleObject(plmSuspendComplete, INFINITE);
+
+                SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "[GDK] in RegisterAppStateChangeNotification handler: plmSuspendComplete event signaled.");
+            } else {
+                SDL_SendAppEvent(SDL_EVENT_WILL_ENTER_FOREGROUND);
+            }
+        };
+        if (RegisterAppStateChangeNotification(rascn, NULL, &hPLM)) {
+            SDL_SetError("[GDK] Unable to call RegisterAppStateChangeNotification");
+            return -1;
+        }
+
+        /* Run the application main() code */
+        result = mainFunction(argc, argv);
+
+        /* Unregister suspend/resume handling */
+        UnregisterAppStateChangeNotification(hPLM);
+        CloseHandle(plmSuspendComplete);
+
+        /* !!! FIXME: This follows the docs exactly, but for some reason still leaks handles on exit? */
+        /* Terminate the task queue and dispatch any pending tasks */
+        XTaskQueueTerminate(taskQueue, false, nullptr, nullptr);
+        while (XTaskQueueDispatch(taskQueue, XTaskQueuePort::Completion, 0))
+            ;
+
+        XTaskQueueCloseHandle(taskQueue);
+
+        XGameRuntimeUninitialize();
+    } else {
+#ifdef __WINGDK__
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal Error", "[GDK] Could not initialize - aborting", NULL);
+#else
+        SDL_assert_always(0 && "[GDK] Could not initialize - aborting");
+#endif
+        result = -1;
+    }
+
+    /* Free argv, to avoid memory leak */
+    for (i = 0; i < argc; ++i) {
+        HeapFree(GetProcessHeap(), 0, argv[i]);
+    }
+    HeapFree(GetProcessHeap(), 0, argv);
+
+    return result;
+}
+
+extern "C" DECLSPEC void
+SDL_GDKSuspendComplete()
+{
+    if (plmSuspendComplete) {
+        SetEvent(plmSuspendComplete);
+    }
+}
+
+extern "C" DECLSPEC int
+SDL_GDKGetDefaultUser(XUserHandle *outUserHandle)
+{
+    XAsyncBlock block = { 0 };
+    HRESULT result;
+
+    if (FAILED(result = XUserAddAsync(XUserAddOptions::AddDefaultUserAllowingUI, &block))) {
+        return WIN_SetErrorFromHRESULT("XUserAddAsync", result);
+    }
+
+    do {
+        result = XUserAddResult(&block, outUserHandle);
+    } while (result == E_PENDING);
+    if (FAILED(result)) {
+        return WIN_SetErrorFromHRESULT("XUserAddResult", result);
+    }
+
+    return 0;
+}

vendor/sdl-3.0.0/src/core/gdk/SDL_gdk.h

@@ -0,0 +1,24 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+/* This is called from WIN_PumpEvents on GDK */
+extern void GDK_DispatchTaskQueue(void);

vendor/sdl-3.0.0/src/core/haiku/SDL_BApp.h

@@ -0,0 +1,425 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_BAPP_H
+#define SDL_BAPP_H
+
+#include <Path.h>
+#include <InterfaceKit.h>
+#include <LocaleRoster.h>
+#ifdef SDL_VIDEO_OPENGL
+#include <OpenGLKit.h>
+#endif
+
+#include "../../video/haiku/SDL_bkeyboard.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "SDL_internal.h"
+
+/* Local includes */
+#include "../../events/SDL_events_c.h"
+#include "../../video/haiku/SDL_bframebuffer.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#include <vector>
+
+/* Forward declarations */
+class SDL_BLooper;
+class SDL_BWin;
+
+/* Message constants */
+enum ToSDL
+{
+    /* Intercepted by BWindow on its way to BView */
+    BAPP_MOUSE_MOVED,
+    BAPP_MOUSE_BUTTON,
+    BAPP_MOUSE_WHEEL,
+    BAPP_KEY,
+    BAPP_REPAINT, /* from _UPDATE_ */
+    /* From BWindow */
+    BAPP_MAXIMIZE, /* from B_ZOOM */
+    BAPP_MINIMIZE,
+    BAPP_RESTORE, /* TODO: IMPLEMENT! */
+    BAPP_SHOW,
+    BAPP_HIDE,
+    BAPP_MOUSE_FOCUS,    /* caused by MOUSE_MOVE */
+    BAPP_KEYBOARD_FOCUS, /* from WINDOW_ACTIVATED */
+    BAPP_WINDOW_CLOSE_REQUESTED,
+    BAPP_WINDOW_MOVED,
+    BAPP_WINDOW_RESIZED,
+    BAPP_SCREEN_CHANGED
+};
+
+
+extern "C" SDL_BLooper *SDL_Looper;
+
+
+/* Create a descendant of BLooper */
+class SDL_BLooper : public BLooper
+{
+  public:
+    SDL_BLooper(const char* name) : BLooper(name)
+    {
+#ifdef SDL_VIDEO_OPENGL
+        _current_context = NULL;
+#endif
+    }
+
+    virtual ~SDL_BLooper()
+    {
+    }
+
+    /* Event-handling functions */
+    virtual void MessageReceived(BMessage *message)
+    {
+        /* Sort out SDL-related messages */
+        switch (message->what) {
+        case BAPP_MOUSE_MOVED:
+            _HandleMouseMove(message);
+            break;
+
+        case BAPP_MOUSE_BUTTON:
+            _HandleMouseButton(message);
+            break;
+
+        case BAPP_MOUSE_WHEEL:
+            _HandleMouseWheel(message);
+            break;
+
+        case BAPP_KEY:
+            _HandleKey(message);
+            break;
+
+        case BAPP_REPAINT:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_EXPOSED);
+            break;
+
+        case BAPP_MAXIMIZE:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_MAXIMIZED);
+            break;
+
+        case BAPP_MINIMIZE:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_MINIMIZED);
+            break;
+
+        case BAPP_SHOW:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_SHOWN);
+            break;
+
+        case BAPP_HIDE:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_HIDDEN);
+            break;
+
+        case BAPP_MOUSE_FOCUS:
+            _HandleMouseFocus(message);
+            break;
+
+        case BAPP_KEYBOARD_FOCUS:
+            _HandleKeyboardFocus(message);
+            break;
+
+        case BAPP_WINDOW_CLOSE_REQUESTED:
+            _HandleBasicWindowEvent(message, SDL_EVENT_WINDOW_CLOSE_REQUESTED);
+            break;
+
+        case BAPP_WINDOW_MOVED:
+            _HandleWindowMoved(message);
+            break;
+
+        case BAPP_WINDOW_RESIZED:
+            _HandleWindowResized(message);
+            break;
+
+        case B_LOCALE_CHANGED:
+            SDL_SendLocaleChangedEvent();
+            break;
+
+        case BAPP_SCREEN_CHANGED:
+            /* TODO: Handle screen resize or workspace change */
+            break;
+
+        default:
+            BLooper::MessageReceived(message);
+            break;
+        }
+    }
+
+    /* Window creation/destruction methods */
+    int32 GetID(SDL_Window *win)
+    {
+        int32 i;
+        for (i = 0; i < _GetNumWindowSlots(); ++i) {
+            if (GetSDLWindow(i) == NULL) {
+                _SetSDLWindow(win, i);
+                return i;
+            }
+        }
+
+        /* Expand the vector if all slots are full */
+        if (i == _GetNumWindowSlots()) {
+            _PushBackWindow(win);
+            return i;
+        }
+
+        /* TODO: error handling */
+        return 0;
+    }
+
+    /* FIXME: Bad coding practice, but I can't include SDL_BWin.h here.  Is
+       there another way to do this? */
+    void ClearID(SDL_BWin *bwin); /* Defined in SDL_BeApp.cc */
+
+    SDL_Window *GetSDLWindow(int32 winID)
+    {
+        return _window_map[winID];
+    }
+
+#ifdef SDL_VIDEO_OPENGL
+    BGLView *GetCurrentContext()
+    {
+        return _current_context;
+    }
+
+    void SetCurrentContext(BGLView *newContext)
+    {
+        if (_current_context)
+            _current_context->UnlockGL();
+        _current_context = newContext;
+        if (_current_context)
+            _current_context->LockGL();
+    }
+#endif
+
+  private:
+    /* Event management */
+    void _HandleBasicWindowEvent(BMessage *msg, SDL_EventType sdlEventType)
+    {
+        SDL_Window *win;
+        int32 winID;
+        if (
+            !_GetWinID(msg, &winID)) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        SDL_SendWindowEvent(win, sdlEventType, 0, 0);
+    }
+
+    void _HandleMouseMove(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        int32 x = 0, y = 0;
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindInt32("x", &x) != B_OK || /* x movement */
+            msg->FindInt32("y", &y) != B_OK    /* y movement */
+        ) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+
+        // Simple relative mode support for mouse.
+        if (SDL_GetMouse()->relative_mode) {
+            int winWidth, winHeight, winPosX, winPosY;
+            SDL_GetWindowSize(win, &winWidth, &winHeight);
+            SDL_GetWindowPosition(win, &winPosX, &winPosY);
+            int dx = x - (winWidth / 2);
+            int dy = y - (winHeight / 2);
+            SDL_SendMouseMotion(0, win, 0, SDL_GetMouse()->relative_mode, (float)dx, (float)dy);
+            set_mouse_position((winPosX + winWidth / 2), (winPosY + winHeight / 2));
+            if (!be_app->IsCursorHidden())
+                be_app->HideCursor();
+        } else {
+            SDL_SendMouseMotion(0, win, 0, 0, (float)x, (float)y);
+            if (SDL_CursorVisible() && be_app->IsCursorHidden())
+                be_app->ShowCursor();
+        }
+    }
+
+    void _HandleMouseButton(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        int32 button, state; /* left/middle/right, pressed/released */
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindInt32("button-id", &button) != B_OK ||
+            msg->FindInt32("button-state", &state) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        SDL_SendMouseButton(0, win, 0, state, button);
+    }
+
+    void _HandleMouseWheel(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        int32 xTicks, yTicks;
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindInt32("xticks", &xTicks) != B_OK ||
+            msg->FindInt32("yticks", &yTicks) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        SDL_SendMouseWheel(0, win, 0, xTicks, -yTicks, SDL_MOUSEWHEEL_NORMAL);
+    }
+
+    void _HandleKey(BMessage *msg)
+    {
+        int32 scancode, state; /* scancode, pressed/released */
+        if (
+            msg->FindInt32("key-state", &state) != B_OK ||
+            msg->FindInt32("key-scancode", &scancode) != B_OK) {
+            return;
+        }
+
+        /* Make sure this isn't a repeated event (key pressed and held) */
+        if (state == SDL_PRESSED && HAIKU_GetKeyState(scancode) == SDL_PRESSED) {
+            return;
+        }
+        HAIKU_SetKeyState(scancode, state);
+        SDL_SendKeyboardKey(0, state, HAIKU_GetScancodeFromBeKey(scancode));
+
+        if (state == SDL_PRESSED && SDL_EventEnabled(SDL_EVENT_TEXT_INPUT)) {
+            const int8 *keyUtf8;
+            ssize_t count;
+            if (msg->FindData("key-utf8", B_INT8_TYPE, (const void **)&keyUtf8, &count) == B_OK) {
+                char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];
+                SDL_zeroa(text);
+                SDL_memcpy(text, keyUtf8, count);
+                SDL_SendKeyboardText(text);
+            }
+        }
+    }
+
+    void _HandleMouseFocus(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        bool bSetFocus; /* If false, lose focus */
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindBool("focusGained", &bSetFocus) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        if (bSetFocus) {
+            SDL_SetMouseFocus(win);
+        } else if (SDL_GetMouseFocus() == win) {
+            /* Only lose all focus if this window was the current focus */
+            SDL_SetMouseFocus(NULL);
+        }
+    }
+
+    void _HandleKeyboardFocus(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        bool bSetFocus; /* If false, lose focus */
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindBool("focusGained", &bSetFocus) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        if (bSetFocus) {
+            SDL_SetKeyboardFocus(win);
+        } else if (SDL_GetKeyboardFocus() == win) {
+            /* Only lose all focus if this window was the current focus */
+            SDL_SetKeyboardFocus(NULL);
+        }
+    }
+
+    void _HandleWindowMoved(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        int32 xPos, yPos;
+        /* Get the window id and new x/y position of the window */
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindInt32("window-x", &xPos) != B_OK ||
+            msg->FindInt32("window-y", &yPos) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        SDL_SendWindowEvent(win, SDL_EVENT_WINDOW_MOVED, xPos, yPos);
+    }
+
+    void _HandleWindowResized(BMessage *msg)
+    {
+        SDL_Window *win;
+        int32 winID;
+        int32 w, h;
+        /* Get the window id ]and new x/y position of the window */
+        if (
+            !_GetWinID(msg, &winID) ||
+            msg->FindInt32("window-w", &w) != B_OK ||
+            msg->FindInt32("window-h", &h) != B_OK) {
+            return;
+        }
+        win = GetSDLWindow(winID);
+        SDL_SendWindowEvent(win, SDL_EVENT_WINDOW_RESIZED, w, h);
+    }
+
+    bool _GetWinID(BMessage *msg, int32 *winID)
+    {
+        return msg->FindInt32("window-id", winID) == B_OK;
+    }
+
+    /* Vector functions: Wraps vector stuff in case we need to change
+       implementation */
+    void _SetSDLWindow(SDL_Window *win, int32 winID)
+    {
+        _window_map[winID] = win;
+    }
+
+    int32 _GetNumWindowSlots()
+    {
+        return _window_map.size();
+    }
+
+    void _PopBackWindow()
+    {
+        _window_map.pop_back();
+    }
+
+    void _PushBackWindow(SDL_Window *win)
+    {
+        _window_map.push_back(win);
+    }
+
+    /* Members */
+    std::vector<SDL_Window *> _window_map; /* Keeps track of SDL_Windows by index-id */
+
+#ifdef SDL_VIDEO_OPENGL
+    BGLView *_current_context;
+#endif
+};
+
+#endif

vendor/sdl-3.0.0/src/core/haiku/SDL_BeApp.cc

@@ -0,0 +1,195 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef __HAIKU__
+
+/* Handle the BeApp specific portions of the application */
+
+#include <AppKit.h>
+#include <storage/AppFileInfo.h>
+#include <storage/Path.h>
+#include <storage/Entry.h>
+#include <storage/File.h>
+#include <unistd.h>
+#include <memory>
+
+#include "SDL_BApp.h"   /* SDL_BLooper class definition */
+#include "SDL_BeApp.h"
+
+#include "../../video/haiku/SDL_BWin.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "../../thread/SDL_systhread.h"
+
+/* Flag to tell whether or not the Be application and looper are active or not */
+static int SDL_BeAppActive = 0;
+static SDL_Thread *SDL_AppThread = NULL;
+SDL_BLooper *SDL_Looper = NULL;
+
+
+/* Default application signature */
+const char *SDL_signature = "application/x-SDL-executable";
+
+
+/* Create a descendant of BApplication */
+class SDL_BApp : public BApplication {
+public:
+    SDL_BApp(const char* signature) :
+        BApplication(signature) {
+    }
+
+
+    virtual ~SDL_BApp() {
+    }
+
+
+    virtual void RefsReceived(BMessage* message) {
+        entry_ref entryRef;
+        for (int32 i = 0; message->FindRef("refs", i, &entryRef) == B_OK; i++) {
+            BPath referencePath = BPath(&entryRef);
+            SDL_SendDropFile(NULL, referencePath.Path());
+        }
+        return;
+    }
+};
+
+
+static int StartBeApp(void *unused)
+{
+    std::unique_ptr<BApplication> App;
+
+    (void)unused;
+    // dig resources for correct signature
+    image_info info;
+    int32 cookie = 0;
+    if (get_next_image_info(B_CURRENT_TEAM, &cookie, &info) == B_OK) {
+        BFile f(info.name, O_RDONLY);
+        if (f.InitCheck() == B_OK) {
+            BAppFileInfo app_info(&f);
+            if (app_info.InitCheck() == B_OK) {
+                char sig[B_MIME_TYPE_LENGTH];
+                if (app_info.GetSignature(sig) == B_OK) {
+                    SDL_signature = strndup(sig, B_MIME_TYPE_LENGTH);
+                }
+            }
+        }
+    }
+
+    App = std::unique_ptr<BApplication>(new SDL_BApp(SDL_signature));
+
+    App->Run();
+    return 0;
+}
+
+
+static int StartBeLooper()
+{
+    if (!be_app) {
+        SDL_AppThread = SDL_CreateThreadInternal(StartBeApp, "SDLApplication", 0, NULL);
+        if (SDL_AppThread == NULL) {
+            return SDL_SetError("Couldn't create BApplication thread");
+        }
+
+        do {
+            SDL_Delay(10);
+        } while ((be_app == NULL) || be_app->IsLaunching());
+    }
+
+     /* Change working directory to that of executable */
+    app_info info;
+    if (B_OK == be_app->GetAppInfo(&info)) {
+        entry_ref ref = info.ref;
+        BEntry entry;
+        if (B_OK == entry.SetTo(&ref)) {
+            BPath path;
+            if (B_OK == path.SetTo(&entry)) {
+                if (B_OK == path.GetParent(&path)) {
+                    chdir(path.Path());
+                }
+            }
+        }
+    }
+
+    SDL_Looper = new SDL_BLooper("SDLLooper");
+    SDL_Looper->Run();
+    return (0);
+}
+
+
+/* Initialize the Be Application, if it's not already started */
+int SDL_InitBeApp(void)
+{
+    /* Create the BApplication that handles appserver interaction */
+    if (SDL_BeAppActive <= 0) {
+        StartBeLooper();
+
+        /* Mark the application active */
+        SDL_BeAppActive = 0;
+    }
+
+    /* Increment the application reference count */
+    ++SDL_BeAppActive;
+
+    /* The app is running, and we're ready to go */
+    return 0;
+}
+
+/* Quit the Be Application, if there's nothing left to do */
+void SDL_QuitBeApp(void)
+{
+    /* Decrement the application reference count */
+    --SDL_BeAppActive;
+
+    /* If the reference count reached zero, clean up the app */
+    if (SDL_BeAppActive == 0) {
+        SDL_Looper->Lock();
+        SDL_Looper->Quit();
+        SDL_Looper = NULL;
+        if (SDL_AppThread != NULL) {
+            if (be_app != NULL) {       /* Not tested */
+                be_app->PostMessage(B_QUIT_REQUESTED);
+            }
+            SDL_WaitThread(SDL_AppThread, NULL);
+            SDL_AppThread = NULL;
+        }
+        /* be_app should now be NULL since be_app has quit */
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+/* SDL_BApp functions */
+void SDL_BLooper::ClearID(SDL_BWin *bwin) {
+    _SetSDLWindow(NULL, bwin->GetID());
+    int32 i = _GetNumWindowSlots() - 1;
+    while (i >= 0 && GetSDLWindow(i) == NULL) {
+        _PopBackWindow();
+        --i;
+    }
+}
+
+#endif /* __HAIKU__ */

vendor/sdl-3.0.0/src/core/haiku/SDL_BeApp.h

@@ -0,0 +1,40 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* Handle the BeApp specific portions of the application */
+
+/* Initialize the Be Application, if it's not already started */
+extern int SDL_InitBeApp(void);
+
+/* Quit the Be Application, if there's nothing left to do */
+extern void SDL_QuitBeApp(void);
+
+/* Be Application Signature*/
+extern const char *SDL_signature;
+
+
+#ifdef __cplusplus
+}
+#endif

vendor/sdl-3.0.0/src/core/linux/SDL_dbus.c

@@ -0,0 +1,634 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+#include "SDL_dbus.h"
+#include "SDL_sandbox.h"
+#include "../../stdlib/SDL_vacopy.h"
+
+#ifdef SDL_USE_LIBDBUS
+/* we never link directly to libdbus. */
+static const char *dbus_library = "libdbus-1.so.3";
+static void *dbus_handle = NULL;
+static char *inhibit_handle = NULL;
+static unsigned int screensaver_cookie = 0;
+static SDL_DBusContext dbus;
+
+static int LoadDBUSSyms(void)
+{
+#define SDL_DBUS_SYM2_OPTIONAL(TYPE, x, y)                   \
+    dbus.x = (TYPE)SDL_LoadFunction(dbus_handle, #y)
+
+#define SDL_DBUS_SYM2(TYPE, x, y)                            \
+    if (!(dbus.x = (TYPE)SDL_LoadFunction(dbus_handle, #y))) \
+    return -1
+
+#define SDL_DBUS_SYM_OPTIONAL(TYPE, x) \
+    SDL_DBUS_SYM2_OPTIONAL(TYPE, x, dbus_##x)
+
+#define SDL_DBUS_SYM(TYPE, x) \
+    SDL_DBUS_SYM2(TYPE, x, dbus_##x)
+
+    SDL_DBUS_SYM(DBusConnection *(*)(DBusBusType, DBusError *), bus_get_private);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *, DBusError *), bus_register);
+    SDL_DBUS_SYM(void (*)(DBusConnection *, const char *, DBusError *), bus_add_match);
+    SDL_DBUS_SYM(DBusConnection *(*)(const char *, DBusError *), connection_open_private);
+    SDL_DBUS_SYM(void (*)(DBusConnection *, dbus_bool_t), connection_set_exit_on_disconnect);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *), connection_get_is_connected);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *, DBusHandleMessageFunction, void *, DBusFreeFunction), connection_add_filter);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *, const char *, const DBusObjectPathVTable *, void *, DBusError *), connection_try_register_object_path);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *, DBusMessage *, dbus_uint32_t *), connection_send);
+    SDL_DBUS_SYM(DBusMessage *(*)(DBusConnection *, DBusMessage *, int, DBusError *), connection_send_with_reply_and_block);
+    SDL_DBUS_SYM(void (*)(DBusConnection *), connection_close);
+    SDL_DBUS_SYM(void (*)(DBusConnection *), connection_ref);
+    SDL_DBUS_SYM(void (*)(DBusConnection *), connection_unref);
+    SDL_DBUS_SYM(void (*)(DBusConnection *), connection_flush);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusConnection *, int), connection_read_write);
+    SDL_DBUS_SYM(DBusDispatchStatus (*)(DBusConnection *), connection_dispatch);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, const char *, const char *), message_is_signal);
+    SDL_DBUS_SYM(DBusMessage *(*)(const char *, const char *, const char *, const char *), message_new_method_call);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, int, ...), message_append_args);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, int, va_list), message_append_args_valist);
+    SDL_DBUS_SYM(void (*)(DBusMessage *, DBusMessageIter *), message_iter_init_append);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessageIter *, int, const char *, DBusMessageIter *), message_iter_open_container);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessageIter *, int, const void *), message_iter_append_basic);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessageIter *, DBusMessageIter *), message_iter_close_container);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, DBusError *, int, ...), message_get_args);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, DBusError *, int, va_list), message_get_args_valist);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessage *, DBusMessageIter *), message_iter_init);
+    SDL_DBUS_SYM(dbus_bool_t (*)(DBusMessageIter *), message_iter_next);
+    SDL_DBUS_SYM(void (*)(DBusMessageIter *, void *), message_iter_get_basic);
+    SDL_DBUS_SYM(int (*)(DBusMessageIter *), message_iter_get_arg_type);
+    SDL_DBUS_SYM(void (*)(DBusMessageIter *, DBusMessageIter *), message_iter_recurse);
+    SDL_DBUS_SYM(void (*)(DBusMessage *), message_unref);
+    SDL_DBUS_SYM(dbus_bool_t (*)(void), threads_init_default);
+    SDL_DBUS_SYM(void (*)(DBusError *), error_init);
+    SDL_DBUS_SYM(dbus_bool_t (*)(const DBusError *), error_is_set);
+    SDL_DBUS_SYM(void (*)(DBusError *), error_free);
+    SDL_DBUS_SYM(char *(*)(void), get_local_machine_id);
+    SDL_DBUS_SYM_OPTIONAL(char *(*)(DBusError *), try_get_local_machine_id);
+    SDL_DBUS_SYM(void (*)(void *), free);
+    SDL_DBUS_SYM(void (*)(char **), free_string_array);
+    SDL_DBUS_SYM(void (*)(void), shutdown);
+
+#undef SDL_DBUS_SYM
+#undef SDL_DBUS_SYM2
+
+    return 0;
+}
+
+static void UnloadDBUSLibrary(void)
+{
+    if (dbus_handle != NULL) {
+        SDL_UnloadObject(dbus_handle);
+        dbus_handle = NULL;
+    }
+}
+
+static int LoadDBUSLibrary(void)
+{
+    int retval = 0;
+    if (dbus_handle == NULL) {
+        dbus_handle = SDL_LoadObject(dbus_library);
+        if (dbus_handle == NULL) {
+            retval = -1;
+            /* Don't call SDL_SetError(): SDL_LoadObject already did. */
+        } else {
+            retval = LoadDBUSSyms();
+            if (retval < 0) {
+                UnloadDBUSLibrary();
+            }
+        }
+    }
+
+    return retval;
+}
+
+static SDL_SpinLock spinlock_dbus_init = 0;
+
+/* you must hold spinlock_dbus_init before calling this! */
+static void SDL_DBus_Init_Spinlocked(void)
+{
+    static SDL_bool is_dbus_available = SDL_TRUE;
+    if (!is_dbus_available) {
+        return; /* don't keep trying if this fails. */
+    }
+
+    if (!dbus.session_conn) {
+        DBusError err;
+
+        if (LoadDBUSLibrary() == -1) {
+            is_dbus_available = SDL_FALSE; /* can't load at all? Don't keep trying. */
+            return;
+        }
+
+        if (!dbus.threads_init_default()) {
+            is_dbus_available = SDL_FALSE;
+            return;
+        }
+
+        dbus.error_init(&err);
+        /* session bus is required */
+
+        dbus.session_conn = dbus.bus_get_private(DBUS_BUS_SESSION, &err);
+        if (dbus.error_is_set(&err)) {
+            dbus.error_free(&err);
+            SDL_DBus_Quit();
+            is_dbus_available = SDL_FALSE;
+            return; /* oh well */
+        }
+        dbus.connection_set_exit_on_disconnect(dbus.session_conn, 0);
+
+        /* system bus is optional */
+        dbus.system_conn = dbus.bus_get_private(DBUS_BUS_SYSTEM, &err);
+        if (!dbus.error_is_set(&err)) {
+            dbus.connection_set_exit_on_disconnect(dbus.system_conn, 0);
+        }
+
+        dbus.error_free(&err);
+    }
+}
+
+void SDL_DBus_Init(void)
+{
+    SDL_AtomicLock(&spinlock_dbus_init); /* make sure two threads can't init at same time, since this can happen before SDL_Init. */
+    SDL_DBus_Init_Spinlocked();
+    SDL_AtomicUnlock(&spinlock_dbus_init);
+}
+
+void SDL_DBus_Quit(void)
+{
+    if (dbus.system_conn) {
+        dbus.connection_close(dbus.system_conn);
+        dbus.connection_unref(dbus.system_conn);
+    }
+    if (dbus.session_conn) {
+        dbus.connection_close(dbus.session_conn);
+        dbus.connection_unref(dbus.session_conn);
+    }
+/* Don't do this - bug 3950
+   dbus_shutdown() is a debug feature which closes all global resources in the dbus library. Calling this should be done by the app, not a library, because if there are multiple users of dbus in the process then SDL could shut it down even though another part is using it.
+*/
+#if 0
+    if (dbus.shutdown) {
+        dbus.shutdown();
+    }
+#endif
+    SDL_zero(dbus);
+    UnloadDBUSLibrary();
+    SDL_free(inhibit_handle);
+    inhibit_handle = NULL;
+}
+
+SDL_DBusContext *SDL_DBus_GetContext(void)
+{
+    if (dbus_handle == NULL || !dbus.session_conn) {
+        SDL_DBus_Init();
+    }
+
+    return (dbus_handle && dbus.session_conn) ? &dbus : NULL;
+}
+
+static SDL_bool SDL_DBus_CallMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
+        if (msg) {
+            int firstarg;
+            va_list ap_reply;
+            va_copy(ap_reply, ap); /* copy the arg list so we don't compete with D-Bus for it */
+            firstarg = va_arg(ap, int);
+            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
+                DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
+                if (reply) {
+                    /* skip any input args, get to output args. */
+                    while ((firstarg = va_arg(ap_reply, int)) != DBUS_TYPE_INVALID) {
+                        /* we assume D-Bus already validated all this. */
+                        {
+                            void *dumpptr = va_arg(ap_reply, void *);
+                            (void)dumpptr;
+                        }
+                        if (firstarg == DBUS_TYPE_ARRAY) {
+                            {
+                                const int dumpint = va_arg(ap_reply, int);
+                                (void)dumpint;
+                            }
+                        }
+                    }
+                    firstarg = va_arg(ap_reply, int);
+                    if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_get_args_valist(reply, NULL, firstarg, ap_reply)) {
+                        retval = SDL_TRUE;
+                    }
+                    dbus.message_unref(reply);
+                }
+            }
+            va_end(ap_reply);
+            dbus.message_unref(msg);
+        }
+    }
+
+    return retval;
+}
+
+SDL_bool SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallMethodInternal(conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallMethodInternal(dbus.session_conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+static SDL_bool SDL_DBus_CallVoidMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
+        if (msg) {
+            int firstarg = va_arg(ap, int);
+            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
+                if (dbus.connection_send(conn, msg, NULL)) {
+                    dbus.connection_flush(conn);
+                    retval = SDL_TRUE;
+                }
+            }
+
+            dbus.message_unref(msg);
+        }
+    }
+
+    return retval;
+}
+
+static SDL_bool SDL_DBus_CallWithBasicReply(DBusConnection *conn, DBusMessage *msg, const int expectedtype, void *result)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
+    if (reply) {
+        DBusMessageIter iter, actual_iter;
+        dbus.message_iter_init(reply, &iter);
+        if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
+            dbus.message_iter_recurse(&iter, &actual_iter);
+        } else {
+            actual_iter = iter;
+        }
+
+        if (dbus.message_iter_get_arg_type(&actual_iter) == expectedtype) {
+            dbus.message_iter_get_basic(&actual_iter, result);
+            retval = SDL_TRUE;
+        }
+
+        dbus.message_unref(reply);
+    }
+
+    return retval;
+}
+
+SDL_bool SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallVoidMethodInternal(conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallVoidMethodInternal(dbus.session_conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, "org.freedesktop.DBus.Properties", "Get");
+        if (msg) {
+            if (dbus.message_append_args(msg, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) {
+                retval = SDL_DBus_CallWithBasicReply(conn, msg, expectedtype, result);
+            }
+            dbus.message_unref(msg);
+        }
+    }
+
+    return retval;
+}
+
+SDL_bool SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
+{
+    return SDL_DBus_QueryPropertyOnConnection(dbus.session_conn, node, path, interface, property, expectedtype, result);
+}
+
+void SDL_DBus_ScreensaverTickle(void)
+{
+    if (screensaver_cookie == 0 && inhibit_handle == NULL) { /* no need to tickle if we're inhibiting. */
+        /* org.gnome.ScreenSaver is the legacy interface, but it'll either do nothing or just be a second harmless tickle on newer systems, so we leave it for now. */
+        SDL_DBus_CallVoidMethod("org.gnome.ScreenSaver", "/org/gnome/ScreenSaver", "org.gnome.ScreenSaver", "SimulateUserActivity", DBUS_TYPE_INVALID);
+        SDL_DBus_CallVoidMethod("org.freedesktop.ScreenSaver", "/org/freedesktop/ScreenSaver", "org.freedesktop.ScreenSaver", "SimulateUserActivity", DBUS_TYPE_INVALID);
+    }
+}
+
+static SDL_bool SDL_DBus_AppendDictWithKeysAndValues(DBusMessageIter *iterInit, const char **keys, const char **values, int count)
+{
+    DBusMessageIter iterDict;
+
+    if (!dbus.message_iter_open_container(iterInit, DBUS_TYPE_ARRAY, "{sv}", &iterDict)) {
+        goto failed;
+    }
+
+    for (int i = 0; i < count; i++) {
+        DBusMessageIter iterEntry, iterValue;
+        const char *key = keys[i];
+        const char *value = values[i];
+
+        if (!dbus.message_iter_open_container(&iterDict, DBUS_TYPE_DICT_ENTRY, NULL, &iterEntry)) {
+            goto failed;
+        }
+
+        if (!dbus.message_iter_append_basic(&iterEntry, DBUS_TYPE_STRING, &key)) {
+            goto failed;
+        }
+
+        if (!dbus.message_iter_open_container(&iterEntry, DBUS_TYPE_VARIANT, DBUS_TYPE_STRING_AS_STRING, &iterValue)) {
+            goto failed;
+        }
+
+        if (!dbus.message_iter_append_basic(&iterValue, DBUS_TYPE_STRING, &value)) {
+            goto failed;
+        }
+
+        if (!dbus.message_iter_close_container(&iterEntry, &iterValue) || !dbus.message_iter_close_container(&iterDict, &iterEntry)) {
+            goto failed;
+        }
+    }
+
+    if (!dbus.message_iter_close_container(iterInit, &iterDict)) {
+        goto failed;
+    }
+
+    return SDL_TRUE;
+
+failed:
+    /* message_iter_abandon_container_if_open() and message_iter_abandon_container() might be
+     * missing if libdbus is too old. Instead, we just return without cleaning up any eventual
+     * open container */
+    return SDL_FALSE;
+}
+
+static SDL_bool SDL_DBus_AppendDictWithKeyValue(DBusMessageIter *iterInit, const char *key, const char *value)
+{
+   const char *keys[1];
+   const char *values[1];
+
+   keys[0] = key;
+   values[0] = value;
+   return SDL_DBus_AppendDictWithKeysAndValues(iterInit, keys, values, 1);
+}
+
+SDL_bool SDL_DBus_ScreensaverInhibit(SDL_bool inhibit)
+{
+    const char *default_inhibit_reason = "Playing a game";
+
+    if ((inhibit && (screensaver_cookie != 0 || inhibit_handle != NULL)) || (!inhibit && (screensaver_cookie == 0 && inhibit_handle == NULL))) {
+        return SDL_TRUE;
+    }
+
+    if (!dbus.session_conn) {
+        /* We either lost connection to the session bus or were not able to
+         * load the D-Bus library at all. */
+        return SDL_FALSE;
+    }
+
+    if (SDL_DetectSandbox() != SDL_SANDBOX_NONE) {
+        const char *bus_name = "org.freedesktop.portal.Desktop";
+        const char *path = "/org/freedesktop/portal/desktop";
+        const char *interface = "org.freedesktop.portal.Inhibit";
+        const char *window = "";                    /* As a future improvement we could gather the X11 XID or Wayland surface identifier */
+        static const unsigned int INHIBIT_IDLE = 8; /* Taken from the portal API reference */
+        DBusMessageIter iterInit;
+
+        if (inhibit) {
+            DBusMessage *msg;
+            SDL_bool retval = SDL_FALSE;
+            const char *key = "reason";
+            const char *reply = NULL;
+            const char *reason = SDL_GetHint(SDL_HINT_SCREENSAVER_INHIBIT_ACTIVITY_NAME);
+            if (reason == NULL || !reason[0]) {
+                reason = default_inhibit_reason;
+            }
+
+            msg = dbus.message_new_method_call(bus_name, path, interface, "Inhibit");
+            if (msg == NULL) {
+                return SDL_FALSE;
+            }
+
+            if (!dbus.message_append_args(msg, DBUS_TYPE_STRING, &window, DBUS_TYPE_UINT32, &INHIBIT_IDLE, DBUS_TYPE_INVALID)) {
+                dbus.message_unref(msg);
+                return SDL_FALSE;
+            }
+
+            dbus.message_iter_init_append(msg, &iterInit);
+
+            /* a{sv} */
+            if (!SDL_DBus_AppendDictWithKeyValue(&iterInit, key, reason)) {
+                dbus.message_unref(msg);
+                return SDL_FALSE;
+            }
+
+            if (SDL_DBus_CallWithBasicReply(dbus.session_conn, msg, DBUS_TYPE_OBJECT_PATH, &reply)) {
+                inhibit_handle = SDL_strdup(reply);
+                retval = SDL_TRUE;
+            }
+
+            dbus.message_unref(msg);
+            return retval;
+        } else {
+            if (!SDL_DBus_CallVoidMethod(bus_name, inhibit_handle, "org.freedesktop.portal.Request", "Close", DBUS_TYPE_INVALID)) {
+                return SDL_FALSE;
+            }
+            SDL_free(inhibit_handle);
+            inhibit_handle = NULL;
+        }
+    } else {
+        const char *bus_name = "org.freedesktop.ScreenSaver";
+        const char *path = "/org/freedesktop/ScreenSaver";
+        const char *interface = "org.freedesktop.ScreenSaver";
+
+        if (inhibit) {
+            const char *app = SDL_GetHint(SDL_HINT_APP_NAME);
+            const char *reason = SDL_GetHint(SDL_HINT_SCREENSAVER_INHIBIT_ACTIVITY_NAME);
+            if (app == NULL || !app[0]) {
+                app = "My SDL application";
+            }
+            if (reason == NULL || !reason[0]) {
+                reason = default_inhibit_reason;
+            }
+
+            if (!SDL_DBus_CallMethod(bus_name, path, interface, "Inhibit",
+                                     DBUS_TYPE_STRING, &app, DBUS_TYPE_STRING, &reason, DBUS_TYPE_INVALID,
+                                     DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
+                return SDL_FALSE;
+            }
+            return (screensaver_cookie != 0) ? SDL_TRUE : SDL_FALSE;
+        } else {
+            if (!SDL_DBus_CallVoidMethod(bus_name, path, interface, "UnInhibit", DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
+                return SDL_FALSE;
+            }
+            screensaver_cookie = 0;
+        }
+    }
+
+    return SDL_TRUE;
+}
+
+void SDL_DBus_PumpEvents(void)
+{
+    if (dbus.session_conn) {
+        dbus.connection_read_write(dbus.session_conn, 0);
+
+        while (dbus.connection_dispatch(dbus.session_conn) == DBUS_DISPATCH_DATA_REMAINS) {
+            /* Do nothing, actual work happens in DBus_MessageFilter */
+            SDL_DelayNS(SDL_US_TO_NS(10));
+        }
+    }
+}
+
+/*
+ * Get the machine ID if possible. Result must be freed with dbus->free().
+ */
+char *SDL_DBus_GetLocalMachineId(void)
+{
+    DBusError err;
+    char *result;
+
+    dbus.error_init(&err);
+
+    if (dbus.try_get_local_machine_id) {
+        /* Available since dbus 1.12.0, has proper error-handling */
+        result = dbus.try_get_local_machine_id(&err);
+    } else {
+        /* Available since time immemorial, but has no error-handling:
+         * if the machine ID can't be read, many versions of libdbus will
+         * treat that as a fatal mis-installation and abort() */
+        result = dbus.get_local_machine_id();
+    }
+
+    if (result) {
+        return result;
+    }
+
+    if (dbus.error_is_set(&err)) {
+        SDL_SetError("%s: %s", err.name, err.message);
+        dbus.error_free(&err);
+    } else {
+        SDL_SetError("Error getting D-Bus machine ID");
+    }
+
+    return NULL;
+}
+
+/*
+ * Convert file drops with mime type "application/vnd.portal.filetransfer" to file paths
+ * Result must be freed with dbus->free_string_array().
+ * https://flatpak.github.io/xdg-desktop-portal/#gdbus-method-org-freedesktop-portal-FileTransfer.RetrieveFiles
+ */
+char **SDL_DBus_DocumentsPortalRetrieveFiles(const char *key, int *path_count)
+{
+    DBusError err;
+    DBusMessageIter iter, iterDict;
+    char **paths = NULL;
+    DBusMessage *reply = NULL;
+    DBusMessage *msg = dbus.message_new_method_call("org.freedesktop.portal.Documents",    /* Node */
+                                                    "/org/freedesktop/portal/documents",   /* Path */
+                                                    "org.freedesktop.portal.FileTransfer", /* Interface */
+                                                    "RetrieveFiles");                      /* Method */
+
+    /* Make sure we have a connection to the dbus session bus */
+    if (!SDL_DBus_GetContext() || !dbus.session_conn) {
+        /* We either cannot connect to the session bus or were unable to
+         * load the D-Bus library at all. */
+        return NULL;
+    }
+
+    dbus.error_init(&err);
+
+    /* First argument is a "application/vnd.portal.filetransfer" key from a DnD or clipboard event */
+    if (!dbus.message_append_args(msg, DBUS_TYPE_STRING, &key, DBUS_TYPE_INVALID)) {
+        SDL_OutOfMemory();
+        dbus.message_unref(msg);
+        goto failed;
+    }
+
+    /* Second argument is a variant dictionary for options.
+     * The spec doesn't define any entries yet so it's empty. */
+    dbus.message_iter_init_append(msg, &iter);
+    if (!dbus.message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &iterDict) ||
+        !dbus.message_iter_close_container(&iter,  &iterDict)) {
+        SDL_OutOfMemory();
+        dbus.message_unref(msg);
+        goto failed;
+    }
+
+    reply = dbus.connection_send_with_reply_and_block(dbus.session_conn, msg, DBUS_TIMEOUT_USE_DEFAULT, &err);
+    dbus.message_unref(msg);
+
+    if (reply) {
+        dbus.message_get_args(reply, &err, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING, &paths, path_count, DBUS_TYPE_INVALID);
+        dbus.message_unref(reply);
+    }
+
+    if (paths) {
+        return paths;
+    }
+
+failed:
+    if (dbus.error_is_set(&err)) {
+        SDL_SetError("%s: %s", err.name, err.message);
+        dbus.error_free(&err);
+    } else {
+        SDL_SetError("Error retrieving paths for documents portal \"%s\"", key);
+    }
+
+    return NULL;
+}
+
+#endif

vendor/sdl-3.0.0/src/core/linux/SDL_dbus.h

@@ -0,0 +1,109 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifndef SDL_dbus_h_
+#define SDL_dbus_h_
+
+#ifdef HAVE_DBUS_DBUS_H
+#define SDL_USE_LIBDBUS 1
+#include <dbus/dbus.h>
+
+#ifndef DBUS_TIMEOUT_USE_DEFAULT
+#define DBUS_TIMEOUT_USE_DEFAULT -1
+#endif
+
+typedef struct SDL_DBusContext
+{
+    DBusConnection *session_conn;
+    DBusConnection *system_conn;
+
+    DBusConnection *(*bus_get_private)(DBusBusType, DBusError *);
+    dbus_bool_t (*bus_register)(DBusConnection *, DBusError *);
+    void (*bus_add_match)(DBusConnection *, const char *, DBusError *);
+    DBusConnection *(*connection_open_private)(const char *, DBusError *);
+    void (*connection_set_exit_on_disconnect)(DBusConnection *, dbus_bool_t);
+    dbus_bool_t (*connection_get_is_connected)(DBusConnection *);
+    dbus_bool_t (*connection_add_filter)(DBusConnection *, DBusHandleMessageFunction, void *, DBusFreeFunction);
+    dbus_bool_t (*connection_try_register_object_path)(DBusConnection *, const char *,
+                                                       const DBusObjectPathVTable *, void *, DBusError *);
+    dbus_bool_t (*connection_send)(DBusConnection *, DBusMessage *, dbus_uint32_t *);
+    DBusMessage *(*connection_send_with_reply_and_block)(DBusConnection *, DBusMessage *, int, DBusError *);
+    void (*connection_close)(DBusConnection *);
+    void (*connection_ref)(DBusConnection *);
+    void (*connection_unref)(DBusConnection *);
+    void (*connection_flush)(DBusConnection *);
+    dbus_bool_t (*connection_read_write)(DBusConnection *, int);
+    DBusDispatchStatus (*connection_dispatch)(DBusConnection *);
+    dbus_bool_t (*message_is_signal)(DBusMessage *, const char *, const char *);
+    DBusMessage *(*message_new_method_call)(const char *, const char *, const char *, const char *);
+    dbus_bool_t (*message_append_args)(DBusMessage *, int, ...);
+    dbus_bool_t (*message_append_args_valist)(DBusMessage *, int, va_list);
+    void (*message_iter_init_append)(DBusMessage *, DBusMessageIter *);
+    dbus_bool_t (*message_iter_open_container)(DBusMessageIter *, int, const char *, DBusMessageIter *);
+    dbus_bool_t (*message_iter_append_basic)(DBusMessageIter *, int, const void *);
+    dbus_bool_t (*message_iter_close_container)(DBusMessageIter *, DBusMessageIter *);
+    dbus_bool_t (*message_get_args)(DBusMessage *, DBusError *, int, ...);
+    dbus_bool_t (*message_get_args_valist)(DBusMessage *, DBusError *, int, va_list);
+    dbus_bool_t (*message_iter_init)(DBusMessage *, DBusMessageIter *);
+    dbus_bool_t (*message_iter_next)(DBusMessageIter *);
+    void (*message_iter_get_basic)(DBusMessageIter *, void *);
+    int (*message_iter_get_arg_type)(DBusMessageIter *);
+    void (*message_iter_recurse)(DBusMessageIter *, DBusMessageIter *);
+    void (*message_unref)(DBusMessage *);
+    dbus_bool_t (*threads_init_default)(void);
+    void (*error_init)(DBusError *);
+    dbus_bool_t (*error_is_set)(const DBusError *);
+    void (*error_free)(DBusError *);
+    char *(*get_local_machine_id)(void);
+    char *(*try_get_local_machine_id)(DBusError *);
+    void (*free)(void *);
+    void (*free_string_array)(char **);
+    void (*shutdown)(void);
+
+} SDL_DBusContext;
+
+extern void SDL_DBus_Init(void);
+extern void SDL_DBus_Quit(void);
+extern SDL_DBusContext *SDL_DBus_GetContext(void);
+
+/* These use the built-in Session connection. */
+extern SDL_bool SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result);
+
+/* These use whatever connection you like. */
+extern SDL_bool SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result);
+
+extern void SDL_DBus_ScreensaverTickle(void);
+extern SDL_bool SDL_DBus_ScreensaverInhibit(SDL_bool inhibit);
+
+extern void SDL_DBus_PumpEvents(void);
+extern char *SDL_DBus_GetLocalMachineId(void);
+
+extern char **SDL_DBus_DocumentsPortalRetrieveFiles(const char *key, int *files_count);
+
+#endif /* HAVE_DBUS_DBUS_H */
+
+#endif /* SDL_dbus_h_ */

vendor/sdl-3.0.0/src/core/linux/SDL_evdev.c

@@ -0,0 +1,962 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_INPUT_LINUXEV
+
+/* This is based on the linux joystick driver */
+/* References: https://www.kernel.org/doc/Documentation/input/input.txt
+ *             https://www.kernel.org/doc/Documentation/input/event-codes.txt
+ *             /usr/include/linux/input.h
+ *             The evtest application is also useful to debug the protocol
+ */
+
+#include "SDL_evdev.h"
+#include "SDL_evdev_kbd.h"
+
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/input.h>
+
+#include "../../events/SDL_events_c.h"
+#include "../../events/SDL_scancode_tables_c.h"
+#include "../../core/linux/SDL_evdev_capabilities.h"
+#include "../../core/linux/SDL_udev.h"
+
+/* These are not defined in older Linux kernel headers */
+#ifndef SYN_DROPPED
+#define SYN_DROPPED 3
+#endif
+#ifndef ABS_MT_SLOT
+#define ABS_MT_SLOT        0x2f
+#define ABS_MT_POSITION_X  0x35
+#define ABS_MT_POSITION_Y  0x36
+#define ABS_MT_TRACKING_ID 0x39
+#define ABS_MT_PRESSURE    0x3a
+#endif
+#ifndef REL_WHEEL_HI_RES
+#define REL_WHEEL_HI_RES  0x0b
+#define REL_HWHEEL_HI_RES 0x0c
+#endif
+
+/* The field to look up in struct input_event for integer seconds */
+#ifndef input_event_sec
+#define input_event_sec time.tv_sec
+#endif
+
+/* The field to look up in struct input_event for fractional seconds */
+#ifndef input_event_usec
+#define input_event_usec time.tv_usec
+#endif
+
+typedef struct SDL_evdevlist_item
+{
+    char *path;
+    int fd;
+
+    /* TODO: use this for every device, not just touchscreen */
+    SDL_bool out_of_sync;
+
+    /* TODO: expand on this to have data for every possible class (mouse,
+       keyboard, touchpad, etc.). Also there's probably some things in here we
+       can pull out to the SDL_evdevlist_item i.e. name */
+    SDL_bool is_touchscreen;
+    struct
+    {
+        char *name;
+
+        int min_x, max_x, range_x;
+        int min_y, max_y, range_y;
+        int min_pressure, max_pressure, range_pressure;
+
+        int max_slots;
+        int current_slot;
+        struct
+        {
+            enum
+            {
+                EVDEV_TOUCH_SLOTDELTA_NONE = 0,
+                EVDEV_TOUCH_SLOTDELTA_DOWN,
+                EVDEV_TOUCH_SLOTDELTA_UP,
+                EVDEV_TOUCH_SLOTDELTA_MOVE
+            } delta;
+            int tracking_id;
+            int x, y, pressure;
+        } *slots;
+
+    } *touchscreen_data;
+
+    /* Mouse state */
+    SDL_bool high_res_wheel;
+    SDL_bool high_res_hwheel;
+    SDL_bool relative_mouse;
+    int mouse_x, mouse_y;
+    int mouse_wheel, mouse_hwheel;
+    int min_x, max_x, range_x;
+    int min_y, max_y, range_y;
+
+    struct SDL_evdevlist_item *next;
+} SDL_evdevlist_item;
+
+typedef struct SDL_EVDEV_PrivateData
+{
+    int ref_count;
+    int num_devices;
+    SDL_evdevlist_item *first;
+    SDL_evdevlist_item *last;
+    SDL_EVDEV_keyboard_state *kbd;
+} SDL_EVDEV_PrivateData;
+
+static SDL_EVDEV_PrivateData *_this = NULL;
+
+static SDL_Scancode SDL_EVDEV_translate_keycode(int keycode);
+static void SDL_EVDEV_sync_device(SDL_evdevlist_item *item);
+static int SDL_EVDEV_device_removed(const char *dev_path);
+
+static int SDL_EVDEV_device_added(const char *dev_path, int udev_class);
+#ifdef SDL_USE_LIBUDEV
+static void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_event, int udev_class, const char *dev_path);
+#endif /* SDL_USE_LIBUDEV */
+
+static Uint8 EVDEV_MouseButtons[] = {
+    SDL_BUTTON_LEFT,   /*  BTN_LEFT        0x110 */
+    SDL_BUTTON_RIGHT,  /*  BTN_RIGHT       0x111 */
+    SDL_BUTTON_MIDDLE, /*  BTN_MIDDLE      0x112 */
+    SDL_BUTTON_X1,     /*  BTN_SIDE        0x113 */
+    SDL_BUTTON_X2,     /*  BTN_EXTRA       0x114 */
+    SDL_BUTTON_X2 + 1, /*  BTN_FORWARD     0x115 */
+    SDL_BUTTON_X2 + 2, /*  BTN_BACK        0x116 */
+    SDL_BUTTON_X2 + 3  /*  BTN_TASK        0x117 */
+};
+
+static int SDL_EVDEV_SetRelativeMouseMode(SDL_bool enabled)
+{
+    /* Mice already send relative events through this interface */
+    return 0;
+}
+
+int SDL_EVDEV_Init(void)
+{
+    if (_this == NULL) {
+        _this = (SDL_EVDEV_PrivateData *)SDL_calloc(1, sizeof(*_this));
+        if (_this == NULL) {
+            return SDL_OutOfMemory();
+        }
+
+#ifdef SDL_USE_LIBUDEV
+        if (SDL_UDEV_Init() < 0) {
+            SDL_free(_this);
+            _this = NULL;
+            return -1;
+        }
+
+        /* Set up the udev callback */
+        if (SDL_UDEV_AddCallback(SDL_EVDEV_udev_callback) < 0) {
+            SDL_UDEV_Quit();
+            SDL_free(_this);
+            _this = NULL;
+            return -1;
+        }
+
+        /* Force a scan to build the initial device list */
+        SDL_UDEV_Scan();
+#else
+        {
+            /* Allow the user to specify a list of devices explicitly of
+               the form:
+                  deviceclass:path[,deviceclass:path[,...]]
+               where device class is an integer representing the
+               SDL_UDEV_deviceclass and path is the full path to
+               the event device. */
+            const char *devices = SDL_getenv("SDL_EVDEV_DEVICES");
+            if (devices) {
+                /* Assume this is the old use of the env var and it is not in
+                   ROM. */
+                char *rest = (char *)devices;
+                char *spec;
+                while ((spec = SDL_strtok_r(rest, ",", &rest))) {
+                    char *endofcls = 0;
+                    long cls = SDL_strtol(spec, &endofcls, 0);
+                    if (endofcls) {
+                        SDL_EVDEV_device_added(endofcls + 1, cls);
+                    }
+                }
+            } else {
+                /* TODO: Scan the devices manually, like a caveman */
+            }
+        }
+#endif /* SDL_USE_LIBUDEV */
+
+        _this->kbd = SDL_EVDEV_kbd_init();
+    }
+
+    SDL_GetMouse()->SetRelativeMouseMode = SDL_EVDEV_SetRelativeMouseMode;
+
+    _this->ref_count += 1;
+
+    return 0;
+}
+
+void SDL_EVDEV_Quit(void)
+{
+    if (_this == NULL) {
+        return;
+    }
+
+    _this->ref_count -= 1;
+
+    if (_this->ref_count < 1) {
+#ifdef SDL_USE_LIBUDEV
+        SDL_UDEV_DelCallback(SDL_EVDEV_udev_callback);
+        SDL_UDEV_Quit();
+#endif /* SDL_USE_LIBUDEV */
+
+        SDL_EVDEV_kbd_quit(_this->kbd);
+
+        /* Remove existing devices */
+        while (_this->first != NULL) {
+            SDL_EVDEV_device_removed(_this->first->path);
+        }
+
+        SDL_assert(_this->first == NULL);
+        SDL_assert(_this->last == NULL);
+        SDL_assert(_this->num_devices == 0);
+
+        SDL_free(_this);
+        _this = NULL;
+    }
+}
+
+#ifdef SDL_USE_LIBUDEV
+static void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_event, int udev_class,
+                                    const char *dev_path)
+{
+    if (dev_path == NULL) {
+        return;
+    }
+
+    switch (udev_event) {
+    case SDL_UDEV_DEVICEADDED:
+        if (!(udev_class & (SDL_UDEV_DEVICE_MOUSE | SDL_UDEV_DEVICE_HAS_KEYS | SDL_UDEV_DEVICE_TOUCHSCREEN | SDL_UDEV_DEVICE_TOUCHPAD))) {
+            return;
+        }
+
+        if (udev_class & SDL_UDEV_DEVICE_JOYSTICK) {
+            return;
+        }
+
+        SDL_EVDEV_device_added(dev_path, udev_class);
+        break;
+    case SDL_UDEV_DEVICEREMOVED:
+        SDL_EVDEV_device_removed(dev_path);
+        break;
+    default:
+        break;
+    }
+}
+#endif /* SDL_USE_LIBUDEV */
+
+void SDL_EVDEV_Poll(void)
+{
+    struct input_event events[32];
+    int i, j, len;
+    SDL_evdevlist_item *item;
+    SDL_Scancode scan_code;
+    int mouse_button;
+    SDL_Mouse *mouse;
+    float norm_x, norm_y, norm_pressure;
+
+    if (!_this) {
+        return;
+    }
+
+#ifdef SDL_USE_LIBUDEV
+    SDL_UDEV_Poll();
+#endif
+
+    mouse = SDL_GetMouse();
+
+    for (item = _this->first; item != NULL; item = item->next) {
+        while ((len = read(item->fd, events, sizeof(events))) > 0) {
+            len /= sizeof(events[0]);
+            for (i = 0; i < len; ++i) {
+                struct input_event *event = &events[i];
+
+                /* special handling for touchscreen, that should eventually be
+                   used for all devices */
+                if (item->out_of_sync && item->is_touchscreen &&
+                    event->type == EV_SYN && event->code != SYN_REPORT) {
+                    break;
+                }
+
+                switch (event->type) {
+                case EV_KEY:
+                    if (event->code >= BTN_MOUSE && event->code < BTN_MOUSE + SDL_arraysize(EVDEV_MouseButtons)) {
+                        mouse_button = event->code - BTN_MOUSE;
+                        if (event->value == 0) {
+                            SDL_SendMouseButton(SDL_EVDEV_GetEventTimestamp(event), mouse->focus, (SDL_MouseID)item->fd, SDL_RELEASED, EVDEV_MouseButtons[mouse_button]);
+                        } else if (event->value == 1) {
+                            SDL_SendMouseButton(SDL_EVDEV_GetEventTimestamp(event), mouse->focus, (SDL_MouseID)item->fd, SDL_PRESSED, EVDEV_MouseButtons[mouse_button]);
+                        }
+                        break;
+                    }
+
+                    /* BTN_TOUCH event value 1 indicates there is contact with
+                       a touchscreen or trackpad (earlist finger's current
+                       position is sent in EV_ABS ABS_X/ABS_Y, switching to
+                       next finger after earlist is released) */
+                    if (item->is_touchscreen && event->code == BTN_TOUCH) {
+                        if (item->touchscreen_data->max_slots == 1) {
+                            if (event->value) {
+                                item->touchscreen_data->slots[0].delta = EVDEV_TOUCH_SLOTDELTA_DOWN;
+                            } else {
+                                item->touchscreen_data->slots[0].delta = EVDEV_TOUCH_SLOTDELTA_UP;
+                            }
+                        }
+                        break;
+                    }
+
+                    /* Probably keyboard */
+                    scan_code = SDL_EVDEV_translate_keycode(event->code);
+                    if (scan_code != SDL_SCANCODE_UNKNOWN) {
+                        if (event->value == 0) {
+                            SDL_SendKeyboardKey(SDL_EVDEV_GetEventTimestamp(event), SDL_RELEASED, scan_code);
+                        } else if (event->value == 1 || event->value == 2 /* key repeated */) {
+                            SDL_SendKeyboardKey(SDL_EVDEV_GetEventTimestamp(event), SDL_PRESSED, scan_code);
+                        }
+                    }
+                    SDL_EVDEV_kbd_keycode(_this->kbd, event->code, event->value);
+                    break;
+                case EV_ABS:
+                    switch (event->code) {
+                    case ABS_MT_SLOT:
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+                        item->touchscreen_data->current_slot = event->value;
+                        break;
+                    case ABS_MT_TRACKING_ID:
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+                        if (event->value >= 0) {
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].tracking_id = event->value;
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta = EVDEV_TOUCH_SLOTDELTA_DOWN;
+                        } else {
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta = EVDEV_TOUCH_SLOTDELTA_UP;
+                        }
+                        break;
+                    case ABS_MT_POSITION_X:
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+                        item->touchscreen_data->slots[item->touchscreen_data->current_slot].x = event->value;
+                        if (item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta == EVDEV_TOUCH_SLOTDELTA_NONE) {
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta = EVDEV_TOUCH_SLOTDELTA_MOVE;
+                        }
+                        break;
+                    case ABS_MT_POSITION_Y:
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+                        item->touchscreen_data->slots[item->touchscreen_data->current_slot].y = event->value;
+                        if (item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta == EVDEV_TOUCH_SLOTDELTA_NONE) {
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta = EVDEV_TOUCH_SLOTDELTA_MOVE;
+                        }
+                        break;
+                    case ABS_MT_PRESSURE:
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+                        item->touchscreen_data->slots[item->touchscreen_data->current_slot].pressure = event->value;
+                        if (item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta == EVDEV_TOUCH_SLOTDELTA_NONE) {
+                            item->touchscreen_data->slots[item->touchscreen_data->current_slot].delta = EVDEV_TOUCH_SLOTDELTA_MOVE;
+                        }
+                        break;
+                    case ABS_X:
+                        if (item->is_touchscreen) {
+                            if (item->touchscreen_data->max_slots != 1) {
+                                break;
+                            }
+                            item->touchscreen_data->slots[0].x = event->value;
+                        } else if (!item->relative_mouse) {
+                            item->mouse_x = event->value;
+                        }
+                        break;
+                    case ABS_Y:
+                        if (item->is_touchscreen) {
+                            if (item->touchscreen_data->max_slots != 1) {
+                                break;
+                            }
+                            item->touchscreen_data->slots[0].y = event->value;
+                        } else if (!item->relative_mouse) {
+                            item->mouse_y = event->value;
+                        }
+                        break;
+                    default:
+                        break;
+                    }
+                    break;
+                case EV_REL:
+                    switch (event->code) {
+                    case REL_X:
+                        if (item->relative_mouse) {
+                            item->mouse_x += event->value;
+                        }
+                        break;
+                    case REL_Y:
+                        if (item->relative_mouse) {
+                            item->mouse_y += event->value;
+                        }
+                        break;
+                    case REL_WHEEL:
+                        if (!item->high_res_wheel) {
+                            item->mouse_wheel += event->value;
+                        }
+                        break;
+                    case REL_WHEEL_HI_RES:
+                        SDL_assert(item->high_res_wheel);
+                        item->mouse_wheel += event->value;
+                        break;
+                    case REL_HWHEEL:
+                        if (!item->high_res_hwheel) {
+                            item->mouse_hwheel += event->value;
+                        }
+                        break;
+                    case REL_HWHEEL_HI_RES:
+                        SDL_assert(item->high_res_hwheel);
+                        item->mouse_hwheel += event->value;
+                        break;
+                    default:
+                        break;
+                    }
+                    break;
+                case EV_SYN:
+                    switch (event->code) {
+                    case SYN_REPORT:
+                        /* Send mouse axis changes together to ensure consistency and reduce event processing overhead */
+                        if (item->relative_mouse) {
+                            if (item->mouse_x != 0 || item->mouse_y != 0) {
+                                SDL_SendMouseMotion(SDL_EVDEV_GetEventTimestamp(event), mouse->focus, (SDL_MouseID)item->fd, item->relative_mouse, (float)item->mouse_x, (float)item->mouse_y);
+                                item->mouse_x = item->mouse_y = 0;
+                            }
+                        } else if (item->range_x > 0 && item->range_y > 0) {
+                            int screen_w = 0, screen_h = 0;
+                            const SDL_DisplayMode *mode = NULL;
+
+                            if (mouse->focus) {
+                                mode = SDL_GetCurrentDisplayMode(SDL_GetDisplayForWindow(mouse->focus));
+                            }
+                            if (!mode) {
+                                mode = SDL_GetCurrentDisplayMode(SDL_GetPrimaryDisplay());
+                            }
+                            if (mode) {
+                                screen_w = mode->w;
+                                screen_h = mode->h;
+                            }
+                            SDL_SendMouseMotion(SDL_EVDEV_GetEventTimestamp(event), mouse->focus, (SDL_MouseID)item->fd, item->relative_mouse,
+                                (float)(item->mouse_x - item->min_x) * screen_w / item->range_x,
+                                (float)(item->mouse_y - item->min_y) * screen_h / item->range_y);
+                        }
+
+                        if (item->mouse_wheel != 0 || item->mouse_hwheel != 0) {
+                            SDL_SendMouseWheel(SDL_EVDEV_GetEventTimestamp(event),
+                                               mouse->focus, (SDL_MouseID)item->fd,
+                                               item->mouse_hwheel / (item->high_res_hwheel ? 120.0f : 1.0f),
+                                               item->mouse_wheel / (item->high_res_wheel ? 120.0f : 1.0f),
+                                               SDL_MOUSEWHEEL_NORMAL);
+                            item->mouse_wheel = item->mouse_hwheel = 0;
+                        }
+
+                        if (!item->is_touchscreen) { /* FIXME: temp hack */
+                            break;
+                        }
+
+                        for (j = 0; j < item->touchscreen_data->max_slots; j++) {
+                            norm_x = (float)(item->touchscreen_data->slots[j].x - item->touchscreen_data->min_x) /
+                                     (float)item->touchscreen_data->range_x;
+                            norm_y = (float)(item->touchscreen_data->slots[j].y - item->touchscreen_data->min_y) /
+                                     (float)item->touchscreen_data->range_y;
+
+                            if (item->touchscreen_data->range_pressure > 0) {
+                                norm_pressure = (float)(item->touchscreen_data->slots[j].pressure - item->touchscreen_data->min_pressure) /
+                                                (float)item->touchscreen_data->range_pressure;
+                            } else {
+                                /* This touchscreen does not support pressure */
+                                norm_pressure = 1.0f;
+                            }
+
+                            /* FIXME: the touch's window shouldn't be null, but
+                             * the coordinate space of touch positions needs to
+                             * be window-relative in that case. */
+                            switch (item->touchscreen_data->slots[j].delta) {
+                            case EVDEV_TOUCH_SLOTDELTA_DOWN:
+                                SDL_SendTouch(SDL_EVDEV_GetEventTimestamp(event), item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, SDL_TRUE, norm_x, norm_y, norm_pressure);
+                                item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
+                                break;
+                            case EVDEV_TOUCH_SLOTDELTA_UP:
+                                SDL_SendTouch(SDL_EVDEV_GetEventTimestamp(event), item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, SDL_FALSE, norm_x, norm_y, norm_pressure);
+                                item->touchscreen_data->slots[j].tracking_id = -1;
+                                item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
+                                break;
+                            case EVDEV_TOUCH_SLOTDELTA_MOVE:
+                                SDL_SendTouchMotion(SDL_EVDEV_GetEventTimestamp(event), item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, norm_x, norm_y, norm_pressure);
+                                item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
+                                break;
+                            default:
+                                break;
+                            }
+                        }
+
+                        if (item->out_of_sync) {
+                            item->out_of_sync = SDL_FALSE;
+                        }
+                        break;
+                    case SYN_DROPPED:
+                        if (item->is_touchscreen) {
+                            item->out_of_sync = SDL_TRUE;
+                        }
+                        SDL_EVDEV_sync_device(item);
+                        break;
+                    default:
+                        break;
+                    }
+                    break;
+                }
+            }
+        }
+    }
+}
+
+static SDL_Scancode SDL_EVDEV_translate_keycode(int keycode)
+{
+    SDL_Scancode scancode = SDL_GetScancodeFromTable(SDL_SCANCODE_TABLE_LINUX, keycode);
+
+#ifdef DEBUG_SCANCODES
+    if (scancode == SDL_SCANCODE_UNKNOWN) {
+        /* BTN_TOUCH is handled elsewhere, but we might still end up here if
+           you get an unexpected BTN_TOUCH from something SDL believes is not
+           a touch device. In this case, we'd rather not get a misleading
+           SDL_Log message about an unknown key. */
+        if (keycode != BTN_TOUCH) {
+            SDL_Log("The key you just pressed is not recognized by SDL. To help "
+                    "get this fixed, please report this to the SDL forums/mailing list "
+                    "<https://discourse.libsdl.org/> EVDEV KeyCode %d",
+                    keycode);
+        }
+    }
+#endif /* DEBUG_SCANCODES */
+
+    return scancode;
+}
+
+static int SDL_EVDEV_init_mouse(SDL_evdevlist_item *item, int udev_class)
+{
+    int ret;
+    struct input_absinfo abs_info;
+
+    ret = ioctl(item->fd, EVIOCGABS(ABS_X), &abs_info);
+    if (ret < 0) {
+        // no absolute mode info, continue
+        return 0;
+    }
+    item->min_x = abs_info.minimum;
+    item->max_x = abs_info.maximum;
+    item->range_x = abs_info.maximum - abs_info.minimum;
+
+    ret = ioctl(item->fd, EVIOCGABS(ABS_Y), &abs_info);
+    if (ret < 0) {
+        // no absolute mode info, continue
+        return 0;
+    }
+    item->min_y = abs_info.minimum;
+    item->max_y = abs_info.maximum;
+    item->range_y = abs_info.maximum - abs_info.minimum;
+
+    return 0;
+}
+
+static int SDL_EVDEV_init_touchscreen(SDL_evdevlist_item *item, int udev_class)
+{
+    int ret, i;
+    unsigned long xreq, yreq;
+    char name[64];
+    struct input_absinfo abs_info;
+
+    if (!item->is_touchscreen) {
+        return 0;
+    }
+
+    item->touchscreen_data = SDL_calloc(1, sizeof(*item->touchscreen_data));
+    if (item->touchscreen_data == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    ret = ioctl(item->fd, EVIOCGNAME(sizeof(name)), name);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data);
+        return SDL_SetError("Failed to get evdev touchscreen name");
+    }
+
+    item->touchscreen_data->name = SDL_strdup(name);
+    if (item->touchscreen_data->name == NULL) {
+        SDL_free(item->touchscreen_data);
+        return SDL_OutOfMemory();
+    }
+
+    ret = ioctl(item->fd, EVIOCGABS(ABS_MT_SLOT), &abs_info);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return SDL_SetError("Failed to get evdev touchscreen limits");
+    }
+
+    if (abs_info.maximum == 0) {
+        item->touchscreen_data->max_slots = 1;
+        xreq = EVIOCGABS(ABS_X);
+        yreq = EVIOCGABS(ABS_Y);
+    } else {
+        item->touchscreen_data->max_slots = abs_info.maximum + 1;
+        xreq = EVIOCGABS(ABS_MT_POSITION_X);
+        yreq = EVIOCGABS(ABS_MT_POSITION_Y);
+    }
+
+    ret = ioctl(item->fd, xreq, &abs_info);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return SDL_SetError("Failed to get evdev touchscreen limits");
+    }
+    item->touchscreen_data->min_x = abs_info.minimum;
+    item->touchscreen_data->max_x = abs_info.maximum;
+    item->touchscreen_data->range_x = abs_info.maximum - abs_info.minimum;
+
+    ret = ioctl(item->fd, yreq, &abs_info);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return SDL_SetError("Failed to get evdev touchscreen limits");
+    }
+    item->touchscreen_data->min_y = abs_info.minimum;
+    item->touchscreen_data->max_y = abs_info.maximum;
+    item->touchscreen_data->range_y = abs_info.maximum - abs_info.minimum;
+
+    ret = ioctl(item->fd, EVIOCGABS(ABS_MT_PRESSURE), &abs_info);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return SDL_SetError("Failed to get evdev touchscreen limits");
+    }
+    item->touchscreen_data->min_pressure = abs_info.minimum;
+    item->touchscreen_data->max_pressure = abs_info.maximum;
+    item->touchscreen_data->range_pressure = abs_info.maximum - abs_info.minimum;
+
+    item->touchscreen_data->slots = SDL_calloc(
+        item->touchscreen_data->max_slots,
+        sizeof(*item->touchscreen_data->slots));
+    if (item->touchscreen_data->slots == NULL) {
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return SDL_OutOfMemory();
+    }
+
+    for (i = 0; i < item->touchscreen_data->max_slots; i++) {
+        item->touchscreen_data->slots[i].tracking_id = -1;
+    }
+
+    ret = SDL_AddTouch(item->fd, /* I guess our fd is unique enough */
+                       (udev_class & SDL_UDEV_DEVICE_TOUCHPAD) ? SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE : SDL_TOUCH_DEVICE_DIRECT,
+                       item->touchscreen_data->name);
+    if (ret < 0) {
+        SDL_free(item->touchscreen_data->slots);
+        SDL_free(item->touchscreen_data->name);
+        SDL_free(item->touchscreen_data);
+        return ret;
+    }
+
+    return 0;
+}
+
+static void SDL_EVDEV_destroy_touchscreen(SDL_evdevlist_item *item)
+{
+    if (!item->is_touchscreen) {
+        return;
+    }
+
+    SDL_DelTouch(item->fd);
+    SDL_free(item->touchscreen_data->slots);
+    SDL_free(item->touchscreen_data->name);
+    SDL_free(item->touchscreen_data);
+}
+
+static void SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
+{
+#ifdef EVIOCGMTSLOTS
+    int i, ret;
+    struct input_absinfo abs_info;
+    /*
+     * struct input_mt_request_layout {
+     *     __u32 code;
+     *     __s32 values[num_slots];
+     * };
+     *
+     * this is the structure we're trying to emulate
+     */
+    Uint32 *mt_req_code;
+    Sint32 *mt_req_values;
+    size_t mt_req_size;
+
+    /* TODO: sync devices other than touchscreen */
+    if (!item->is_touchscreen) {
+        return;
+    }
+
+    mt_req_size = sizeof(*mt_req_code) +
+                  sizeof(*mt_req_values) * item->touchscreen_data->max_slots;
+
+    mt_req_code = SDL_calloc(1, mt_req_size);
+    if (mt_req_code == NULL) {
+        return;
+    }
+
+    mt_req_values = (Sint32 *)mt_req_code + 1;
+
+    *mt_req_code = ABS_MT_TRACKING_ID;
+    ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
+    if (ret < 0) {
+        SDL_free(mt_req_code);
+        return;
+    }
+    for (i = 0; i < item->touchscreen_data->max_slots; i++) {
+        /*
+         * This doesn't account for the very edge case of the user removing their
+         * finger and replacing it on the screen during the time we're out of sync,
+         * which'll mean that we're not going from down -> up or up -> down, we're
+         * going from down -> down but with a different tracking id, meaning we'd
+         * have to tell SDL of the two events, but since we wait till SYN_REPORT in
+         * SDL_EVDEV_Poll to tell SDL, the current structure of this code doesn't
+         * allow it. Lets just pray to God it doesn't happen.
+         */
+        if (item->touchscreen_data->slots[i].tracking_id < 0 &&
+            mt_req_values[i] >= 0) {
+            item->touchscreen_data->slots[i].tracking_id = mt_req_values[i];
+            item->touchscreen_data->slots[i].delta = EVDEV_TOUCH_SLOTDELTA_DOWN;
+        } else if (item->touchscreen_data->slots[i].tracking_id >= 0 &&
+                   mt_req_values[i] < 0) {
+            item->touchscreen_data->slots[i].tracking_id = -1;
+            item->touchscreen_data->slots[i].delta = EVDEV_TOUCH_SLOTDELTA_UP;
+        }
+    }
+
+    *mt_req_code = ABS_MT_POSITION_X;
+    ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
+    if (ret < 0) {
+        SDL_free(mt_req_code);
+        return;
+    }
+    for (i = 0; i < item->touchscreen_data->max_slots; i++) {
+        if (item->touchscreen_data->slots[i].tracking_id >= 0 &&
+            item->touchscreen_data->slots[i].x != mt_req_values[i]) {
+            item->touchscreen_data->slots[i].x = mt_req_values[i];
+            if (item->touchscreen_data->slots[i].delta ==
+                EVDEV_TOUCH_SLOTDELTA_NONE) {
+                item->touchscreen_data->slots[i].delta =
+                    EVDEV_TOUCH_SLOTDELTA_MOVE;
+            }
+        }
+    }
+
+    *mt_req_code = ABS_MT_POSITION_Y;
+    ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
+    if (ret < 0) {
+        SDL_free(mt_req_code);
+        return;
+    }
+    for (i = 0; i < item->touchscreen_data->max_slots; i++) {
+        if (item->touchscreen_data->slots[i].tracking_id >= 0 &&
+            item->touchscreen_data->slots[i].y != mt_req_values[i]) {
+            item->touchscreen_data->slots[i].y = mt_req_values[i];
+            if (item->touchscreen_data->slots[i].delta ==
+                EVDEV_TOUCH_SLOTDELTA_NONE) {
+                item->touchscreen_data->slots[i].delta =
+                    EVDEV_TOUCH_SLOTDELTA_MOVE;
+            }
+        }
+    }
+
+    *mt_req_code = ABS_MT_PRESSURE;
+    ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
+    if (ret < 0) {
+        SDL_free(mt_req_code);
+        return;
+    }
+    for (i = 0; i < item->touchscreen_data->max_slots; i++) {
+        if (item->touchscreen_data->slots[i].tracking_id >= 0 &&
+            item->touchscreen_data->slots[i].pressure != mt_req_values[i]) {
+            item->touchscreen_data->slots[i].pressure = mt_req_values[i];
+            if (item->touchscreen_data->slots[i].delta ==
+                EVDEV_TOUCH_SLOTDELTA_NONE) {
+                item->touchscreen_data->slots[i].delta =
+                    EVDEV_TOUCH_SLOTDELTA_MOVE;
+            }
+        }
+    }
+
+    ret = ioctl(item->fd, EVIOCGABS(ABS_MT_SLOT), &abs_info);
+    if (ret < 0) {
+        SDL_free(mt_req_code);
+        return;
+    }
+    item->touchscreen_data->current_slot = abs_info.value;
+
+    SDL_free(mt_req_code);
+
+#endif /* EVIOCGMTSLOTS */
+}
+
+static int SDL_EVDEV_device_added(const char *dev_path, int udev_class)
+{
+    SDL_evdevlist_item *item;
+    unsigned long relbit[NBITS(REL_MAX)] = { 0 };
+
+    /* Check to make sure it's not already in list. */
+    for (item = _this->first; item != NULL; item = item->next) {
+        if (SDL_strcmp(dev_path, item->path) == 0) {
+            return -1; /* already have this one */
+        }
+    }
+
+    item = (SDL_evdevlist_item *)SDL_calloc(1, sizeof(SDL_evdevlist_item));
+    if (item == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    item->fd = open(dev_path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
+    if (item->fd < 0) {
+        SDL_free(item);
+        return SDL_SetError("Unable to open %s", dev_path);
+    }
+
+    item->path = SDL_strdup(dev_path);
+    if (item->path == NULL) {
+        close(item->fd);
+        SDL_free(item);
+        return SDL_OutOfMemory();
+    }
+
+    if (ioctl(item->fd, EVIOCGBIT(EV_REL, sizeof(relbit)), relbit) >= 0) {
+        item->relative_mouse = test_bit(REL_X, relbit) && test_bit(REL_Y, relbit);
+        item->high_res_wheel = test_bit(REL_WHEEL_HI_RES, relbit);
+        item->high_res_hwheel = test_bit(REL_HWHEEL_HI_RES, relbit);
+    }
+
+    /* For now, we just treat a touchpad like a touchscreen */
+    if (udev_class & (SDL_UDEV_DEVICE_TOUCHSCREEN | SDL_UDEV_DEVICE_TOUCHPAD)) {
+        int ret;
+        item->is_touchscreen = SDL_TRUE;
+        ret = SDL_EVDEV_init_touchscreen(item, udev_class);
+        if (ret < 0) {
+            close(item->fd);
+            SDL_free(item->path);
+            SDL_free(item);
+            return ret;
+        }
+    } else if (udev_class & SDL_UDEV_DEVICE_MOUSE) {
+        int ret = SDL_EVDEV_init_mouse(item, udev_class);
+        if (ret < 0) {
+            close(item->fd);
+            SDL_free(item->path);
+            SDL_free(item);
+            return ret;
+        }
+    }
+
+    if (_this->last == NULL) {
+        _this->first = _this->last = item;
+    } else {
+        _this->last->next = item;
+        _this->last = item;
+    }
+
+    SDL_EVDEV_sync_device(item);
+
+    return _this->num_devices++;
+}
+
+static int SDL_EVDEV_device_removed(const char *dev_path)
+{
+    SDL_evdevlist_item *item;
+    SDL_evdevlist_item *prev = NULL;
+
+    for (item = _this->first; item != NULL; item = item->next) {
+        /* found it, remove it. */
+        if (SDL_strcmp(dev_path, item->path) == 0) {
+            if (prev != NULL) {
+                prev->next = item->next;
+            } else {
+                SDL_assert(_this->first == item);
+                _this->first = item->next;
+            }
+            if (item == _this->last) {
+                _this->last = prev;
+            }
+            if (item->is_touchscreen) {
+                SDL_EVDEV_destroy_touchscreen(item);
+            }
+            close(item->fd);
+            SDL_free(item->path);
+            SDL_free(item);
+            _this->num_devices--;
+            return 0;
+        }
+        prev = item;
+    }
+
+    return -1;
+}
+
+Uint64 SDL_EVDEV_GetEventTimestamp(struct input_event *event)
+{
+    static Uint64 timestamp_offset;
+    Uint64 timestamp;
+    Uint64 now = SDL_GetTicksNS();
+
+    /* The kernel internally has nanosecond timestamps, but converts it
+       to microseconds when delivering the events */
+    timestamp = event->input_event_sec;
+    timestamp *= SDL_NS_PER_SECOND;
+    timestamp += SDL_US_TO_NS(event->input_event_usec);
+
+    if (!timestamp_offset) {
+        timestamp_offset = (now - timestamp);
+    }
+    timestamp += timestamp_offset;
+
+    if (timestamp > now) {
+        timestamp_offset -= (timestamp - now);
+        timestamp = now;
+    }
+    return timestamp;
+}
+
+#endif /* SDL_INPUT_LINUXEV */

vendor/sdl-3.0.0/src/core/linux/SDL_evdev.h

@@ -0,0 +1,38 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifndef SDL_evdev_h_
+#define SDL_evdev_h_
+
+#ifdef SDL_INPUT_LINUXEV
+
+struct input_event;
+
+extern int SDL_EVDEV_Init(void);
+extern void SDL_EVDEV_Quit(void);
+extern void SDL_EVDEV_Poll(void);
+extern Uint64 SDL_EVDEV_GetEventTimestamp(struct input_event *event);
+
+#endif /* SDL_INPUT_LINUXEV */
+
+#endif /* SDL_evdev_h_ */

vendor/sdl-3.0.0/src/core/linux/SDL_evdev_capabilities.c

@@ -0,0 +1,167 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 2020 Collabora Ltd.
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#include "SDL_evdev_capabilities.h"
+
+#ifdef HAVE_LINUX_INPUT_H
+
+/* missing defines in older Linux kernel headers */
+#ifndef BTN_TRIGGER_HAPPY
+#define BTN_TRIGGER_HAPPY 0x2c0
+#endif
+#ifndef BTN_DPAD_UP
+#define BTN_DPAD_UP 0x220
+#endif
+#ifndef KEY_ALS_TOGGLE
+#define KEY_ALS_TOGGLE 0x230
+#endif
+
+extern int
+SDL_EVDEV_GuessDeviceClass(const unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)],
+                           const unsigned long bitmask_ev[NBITS(EV_MAX)],
+                           const unsigned long bitmask_abs[NBITS(ABS_MAX)],
+                           const unsigned long bitmask_key[NBITS(KEY_MAX)],
+                           const unsigned long bitmask_rel[NBITS(REL_MAX)])
+{
+    struct range
+    {
+        unsigned start;
+        unsigned end;
+    };
+
+    /* key code ranges above BTN_MISC (start is inclusive, stop is exclusive)*/
+    static const struct range high_key_blocks[] = {
+        { KEY_OK, BTN_DPAD_UP },
+        { KEY_ALS_TOGGLE, BTN_TRIGGER_HAPPY }
+    };
+
+    int devclass = 0;
+    unsigned long keyboard_mask;
+
+    /* If the kernel specifically says it's an accelerometer, believe it */
+    if (test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props)) {
+        return SDL_UDEV_DEVICE_ACCELEROMETER;
+    }
+
+    /* We treat pointing sticks as indistinguishable from mice */
+    if (test_bit(INPUT_PROP_POINTING_STICK, bitmask_props)) {
+        return SDL_UDEV_DEVICE_MOUSE;
+    }
+
+    /* We treat buttonpads as equivalent to touchpads */
+    if (test_bit(INPUT_PROP_TOPBUTTONPAD, bitmask_props) ||
+        test_bit(INPUT_PROP_BUTTONPAD, bitmask_props)) {
+        return SDL_UDEV_DEVICE_TOUCHPAD;
+    }
+
+    /* X, Y, Z axes but no buttons probably means an accelerometer */
+    if (test_bit(EV_ABS, bitmask_ev) &&
+        test_bit(ABS_X, bitmask_abs) &&
+        test_bit(ABS_Y, bitmask_abs) &&
+        test_bit(ABS_Z, bitmask_abs) &&
+        !test_bit(EV_KEY, bitmask_ev)) {
+        return SDL_UDEV_DEVICE_ACCELEROMETER;
+    }
+
+    /* RX, RY, RZ axes but no buttons probably means a gyro or
+     * accelerometer (we don't distinguish) */
+    if (test_bit(EV_ABS, bitmask_ev) &&
+        test_bit(ABS_RX, bitmask_abs) &&
+        test_bit(ABS_RY, bitmask_abs) &&
+        test_bit(ABS_RZ, bitmask_abs) &&
+        !test_bit(EV_KEY, bitmask_ev)) {
+        return SDL_UDEV_DEVICE_ACCELEROMETER;
+    }
+
+    if (test_bit(EV_ABS, bitmask_ev) &&
+        test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs)) {
+        if (test_bit(BTN_STYLUS, bitmask_key) || test_bit(BTN_TOOL_PEN, bitmask_key)) {
+            ; /* ID_INPUT_TABLET */
+        } else if (test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key)) {
+            devclass |= SDL_UDEV_DEVICE_TOUCHPAD; /* ID_INPUT_TOUCHPAD */
+        } else if (test_bit(BTN_MOUSE, bitmask_key)) {
+            devclass |= SDL_UDEV_DEVICE_MOUSE; /* ID_INPUT_MOUSE */
+        } else if (test_bit(BTN_TOUCH, bitmask_key)) {
+            /* TODO: better determining between touchscreen and multitouch touchpad,
+               see https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-input_id.c */
+            devclass |= SDL_UDEV_DEVICE_TOUCHSCREEN; /* ID_INPUT_TOUCHSCREEN */
+        }
+
+        if (test_bit(BTN_TRIGGER, bitmask_key) ||
+            test_bit(BTN_A, bitmask_key) ||
+            test_bit(BTN_1, bitmask_key) ||
+            test_bit(ABS_RX, bitmask_abs) ||
+            test_bit(ABS_RY, bitmask_abs) ||
+            test_bit(ABS_RZ, bitmask_abs) ||
+            test_bit(ABS_THROTTLE, bitmask_abs) ||
+            test_bit(ABS_RUDDER, bitmask_abs) ||
+            test_bit(ABS_WHEEL, bitmask_abs) ||
+            test_bit(ABS_GAS, bitmask_abs) ||
+            test_bit(ABS_BRAKE, bitmask_abs)) {
+            devclass |= SDL_UDEV_DEVICE_JOYSTICK; /* ID_INPUT_JOYSTICK */
+        }
+    }
+
+    if (test_bit(EV_REL, bitmask_ev) &&
+        test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel) &&
+        test_bit(BTN_MOUSE, bitmask_key)) {
+        devclass |= SDL_UDEV_DEVICE_MOUSE; /* ID_INPUT_MOUSE */
+    }
+
+    if (test_bit(EV_KEY, bitmask_ev)) {
+        unsigned i;
+        unsigned long found = 0;
+
+        for (i = 0; i < BTN_MISC / BITS_PER_LONG; ++i) {
+            found |= bitmask_key[i];
+        }
+        /* If there are no keys in the lower block, check the higher blocks */
+        if (!found) {
+            unsigned block;
+            for (block = 0; block < (sizeof(high_key_blocks) / sizeof(struct range)); ++block) {
+                for (i = high_key_blocks[block].start; i < high_key_blocks[block].end; ++i) {
+                    if (test_bit(i, bitmask_key)) {
+                        found = 1;
+                        break;
+                    }
+                }
+            }
+        }
+
+        if (found > 0) {
+            devclass |= SDL_UDEV_DEVICE_HAS_KEYS; /* ID_INPUT_KEY */
+        }
+    }
+
+    /* the first 32 bits are ESC, numbers, and Q to D, so if we have all of
+     * those, consider it to be a fully-featured keyboard;
+     * do not test KEY_RESERVED, though */
+    keyboard_mask = 0xFFFFFFFE;
+    if ((bitmask_key[0] & keyboard_mask) == keyboard_mask) {
+        devclass |= SDL_UDEV_DEVICE_KEYBOARD; /* ID_INPUT_KEYBOARD */
+    }
+
+    return devclass;
+}
+
+#endif /* HAVE_LINUX_INPUT_H */