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refactor(fmod): move all original files into fmod directory

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phaneron 2025-08-20 04:38:38 -04:00
parent 50fb3c6b1c
commit 35569faecc
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208
fmod/lib/ogg_vorbis/ogg/include/ogg/ogg.h Executable file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: toplevel libogg include
last mod: $Id: ogg.h 16051 2009-05-27 05:00:06Z xiphmont $
********************************************************************/
#ifndef _OGG_H
#define _OGG_H
#ifdef __cplusplus
extern "C" {
#endif
#include <ogg/os_types.h>
#include <stddef.h>
typedef struct {
void *iov_base;
size_t iov_len;
} ogg_iovec_t;
typedef struct {
ogg_int32_t endbyte;
int endbit;
unsigned char *buffer;
unsigned char *ptr;
ogg_int32_t storage;
} oggpack_buffer;
/* ogg_page is used to encapsulate the data in one Ogg bitstream page *****/
typedef struct {
unsigned char *header;
ogg_int32_t header_len;
unsigned char *body;
ogg_int32_t body_len;
} ogg_page;
/* ogg_stream_state contains the current encode/decode state of a logical
Ogg bitstream **********************************************************/
typedef struct {
unsigned char *body_data; /* bytes from packet bodies */
ogg_int32_t body_storage; /* storage elements allocated */
ogg_int32_t body_fill; /* elements stored; fill mark */
ogg_int32_t body_returned; /* elements of fill returned */
int *lacing_vals; /* The values that will go to the segment table */
ogg_int64_t *granule_vals; /* granulepos values for headers. Not compact
this way, but it is simple coupled to the
lacing fifo */
ogg_int32_t lacing_storage;
ogg_int32_t lacing_fill;
ogg_int32_t lacing_packet;
ogg_int32_t lacing_returned;
unsigned char header[282]; /* working space for header encode */
int header_fill;
int e_o_s; /* set when we have buffered the last packet in the
logical bitstream */
int b_o_s; /* set after we've written the initial page
of a logical bitstream */
ogg_int32_t serialno;
ogg_int32_t pageno;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
ogg_int64_t granulepos;
} ogg_stream_state;
/* ogg_packet is used to encapsulate the data and metadata beogg_int32_ting
to a single raw Ogg/Vorbis packet *************************************/
typedef struct {
unsigned char *packet;
ogg_int32_t bytes;
ogg_int32_t b_o_s;
ogg_int32_t e_o_s;
ogg_int64_t granulepos;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
} ogg_packet;
typedef struct {
unsigned char *data;
int storage;
int fill;
int returned;
int unsynced;
int headerbytes;
int bodybytes;
} ogg_sync_state;
/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
//extern void FMOD_oggpack_writeinit(void *context, oggpack_buffer *b);
//extern int FMOD_oggpack_writecheck(oggpack_buffer *b);
//extern void FMOD_oggpack_writetrunc(oggpack_buffer *b,ogg_int32_t bits);
//extern void FMOD_oggpack_writealign(oggpack_buffer *b);
//extern void FMOD_oggpack_writecopy(oggpack_buffer *b,void *source,ogg_int32_t bits);
extern void FMOD_oggpack_reset(oggpack_buffer *b);
//extern void FMOD_oggpack_writeclear(oggpack_buffer *b);
extern void FMOD_oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
//extern void FMOD_oggpack_write(oggpack_buffer *b, ogg_uint32_t value,int bits);
extern ogg_int32_t FMOD_oggpack_look(oggpack_buffer *b,int bits);
extern ogg_int32_t FMOD_oggpack_look1(oggpack_buffer *b);
extern void FMOD_oggpack_adv(oggpack_buffer *b,int bits);
extern void FMOD_oggpack_adv1(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpack_read(oggpack_buffer *b,int bits);
extern ogg_int32_t FMOD_oggpack_read1(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpack_bytes(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpack_bits(oggpack_buffer *b);
extern unsigned char *FMOD_oggpack_get_buffer(oggpack_buffer *b);
//extern void FMOD_oggpackB_writeinit(oggpack_buffer *b);
//extern int FMOD_oggpackB_writecheck(oggpack_buffer *b);
//extern void FMOD_oggpackB_writetrunc(oggpack_buffer *b,ogg_int32_t bits);
//extern void FMOD_oggpackB_writealign(oggpack_buffer *b);
//extern void FMOD_oggpackB_writecopy(oggpack_buffer *b,void *source,ogg_int32_t bits);
extern void FMOD_oggpackB_reset(oggpack_buffer *b);
//extern void FMOD_oggpackB_writeclear(oggpack_buffer *b);
extern void FMOD_oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
//extern void FMOD_oggpackB_write(oggpack_buffer *b, ogg_uint32_t value,int bits);
extern ogg_int32_t FMOD_oggpackB_look(oggpack_buffer *b,int bits);
extern ogg_int32_t FMOD_oggpackB_look1(oggpack_buffer *b);
extern void FMOD_oggpackB_adv(oggpack_buffer *b,int bits);
extern void FMOD_oggpackB_adv1(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpackB_read(oggpack_buffer *b,int bits);
extern ogg_int32_t FMOD_oggpackB_read1(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpackB_bytes(oggpack_buffer *b);
extern ogg_int32_t FMOD_oggpackB_bits(oggpack_buffer *b);
extern unsigned char *FMOD_oggpackB_get_buffer(oggpack_buffer *b);
/* Ogg BITSTREAM PRIMITIVES: encoding **************************/
//extern int FMOD_ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op);
//extern int FMOD_ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov,
// int count, ogg_int32_t e_o_s, ogg_int64_t granulepos);
//extern int FMOD_ogg_stream_pageout(ogg_stream_state *os, ogg_page *og);
//extern int FMOD_ogg_stream_flush(ogg_stream_state *os, ogg_page *og);
/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
extern int FMOD_ogg_sync_init(ogg_sync_state *oy);
extern int FMOD_ogg_sync_clear(void *context, ogg_sync_state *oy);
extern int FMOD_ogg_sync_reset(ogg_sync_state *oy);
extern int FMOD_ogg_sync_destroy(void *context, ogg_sync_state *oy);
extern int FMOD_ogg_sync_check(ogg_sync_state *oy);
extern char *FMOD_ogg_sync_buffer(void *context, ogg_sync_state *oy, ogg_int32_t size);
extern int FMOD_ogg_sync_wrote(ogg_sync_state *oy, ogg_int32_t bytes);
extern ogg_int32_t FMOD_ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
extern int FMOD_ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
extern int FMOD_ogg_stream_pagein(void *context, ogg_stream_state *os, ogg_page *og);
extern int FMOD_ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
extern int FMOD_ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
/* Ogg BITSTREAM PRIMITIVES: general ***************************/
extern int FMOD_ogg_stream_init(void *context, ogg_stream_state *os,int serialno);
extern int FMOD_ogg_stream_clear(void *context, ogg_stream_state *os);
extern int FMOD_ogg_stream_reset(ogg_stream_state *os);
extern int FMOD_ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
extern int FMOD_ogg_stream_destroy(void *context, ogg_stream_state *os);
extern int FMOD_ogg_stream_check(ogg_stream_state *os);
extern int FMOD_ogg_stream_eos(ogg_stream_state *os);
extern void FMOD_ogg_page_checksum_set(ogg_page *og);
extern int FMOD_ogg_page_version(const ogg_page *og);
extern int FMOD_ogg_page_continued(const ogg_page *og);
extern int FMOD_ogg_page_bos(const ogg_page *og);
extern int FMOD_ogg_page_eos(const ogg_page *og);
extern ogg_int64_t FMOD_ogg_page_granulepos(const ogg_page *og);
extern int FMOD_ogg_page_serialno(const ogg_page *og);
extern ogg_int32_t FMOD_ogg_page_pageno(const ogg_page *og);
extern int FMOD_ogg_page_packets(const ogg_page *og);
extern void FMOD_ogg_packet_clear(void *context, ogg_packet *op);
#ifdef __cplusplus
}
#endif
#endif /* _OGG_H */

201
fmod/lib/ogg_vorbis/ogg/include/ogg/os_types.h Executable file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: #ifdef jail to whip a few platforms into the UNIX ideal.
last mod: $Id: os_types.h 14997 2008-06-04 03:27:18Z ivo $
********************************************************************/
#ifndef _OS_TYPES_H
#define _OS_TYPES_H
/* make it easy on the folks that want to compile the libs with a
different malloc than stdlib */
#if 1
extern void * FMOD_OggVorbis_Malloc(void *context, int size);
extern void * FMOD_OggVorbis_Calloc(void *context, int count, int size);
extern void * FMOD_OggVorbis_ReAlloc(void *context, void *ptr, int size);
extern void FMOD_OggVorbis_Free(void *context, void *ptr);
#define _ogg_malloc(_x) FMOD_OggVorbis_Malloc(context, _x)
#define _ogg_calloc(_x, _y) FMOD_OggVorbis_Calloc(context, _x, _y)
#define _ogg_realloc(_x, _y) FMOD_OggVorbis_ReAlloc(context, _x, _y)
#define _ogg_free(_x) FMOD_OggVorbis_Free(context, _x)
#include "../../../../../src/fmod_types.h" /* For FMOD_memset/memcpy */
#else
#define _ogg_malloc malloc
#define _ogg_calloc calloc
#define _ogg_realloc realloc
#define _ogg_free free
#endif
#if defined(WIN32) || defined(_XENON)
# if defined(__CYGWIN__)
# include <stdint.h>
typedef int16_t ogg_int16_t;
typedef uint16_t ogg_uint16_t;
typedef int32_t ogg_int32_t;
typedef uint32_t ogg_uint32_t;
typedef int64_t ogg_int64_t;
typedef uint64_t ogg_uint64_t;
# elif defined(__MINGW32__)
# include <sys/types.h>
typedef short ogg_int16_t;
typedef unsigned short ogg_uint16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
typedef unsigned long long ogg_uint64_t;
# elif defined(__MWERKS__)
typedef long long ogg_int64_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef short ogg_int16_t;
typedef unsigned short ogg_uint16_t;
# else
/* MSVC/Borland */
typedef __int64 ogg_int64_t;
typedef __int32 ogg_int32_t;
typedef unsigned __int32 ogg_uint32_t;
typedef __int16 ogg_int16_t;
typedef unsigned __int16 ogg_uint16_t;
# endif
#elif defined(__MACOS__)
# include <sys/types.h>
typedef SInt16 ogg_int16_t;
typedef UInt16 ogg_uint16_t;
typedef SInt32 ogg_int32_t;
typedef UInt32 ogg_uint32_t;
typedef SInt64 ogg_int64_t;
#elif (defined(__APPLE__) && defined(__MACH__)) /* MacOS X Framework build */
# include <sys/types.h>
typedef int16_t ogg_int16_t;
typedef u_int16_t ogg_uint16_t;
typedef int32_t ogg_int32_t;
typedef u_int32_t ogg_uint32_t;
typedef int64_t ogg_int64_t;
#elif defined(__HAIKU__)
/* Haiku */
# include <sys/types.h>
typedef short ogg_int16_t;
typedef unsigned short ogg_uint16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#elif defined(__BEOS__)
/* Be */
# include <inttypes.h>
typedef int16_t ogg_int16_t;
typedef u_int16_t ogg_uint16_t;
typedef int32_t ogg_int32_t;
typedef u_int32_t ogg_uint32_t;
typedef int64_t ogg_int64_t;
#elif defined (__EMX__)
/* OS/2 GCC */
typedef short ogg_int16_t;
typedef unsigned short ogg_uint16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#elif defined (R5900)
/* PS2 */
typedef short ogg_int16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long ogg_int64_t;
#if defined(__MWERKS__)
#define alloca __alloca
#endif
#elif defined (DJGPP)
/* DJGPP */
typedef short ogg_int16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#elif defined(__SYMBIAN32__)
/* Symbian GCC */
typedef signed short ogg_int16_t;
typedef unsigned short ogg_uint16_t;
typedef signed int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long int ogg_int64_t;
#elif defined(SN_TARGET_PS3) || defined(_PS3)
#include <alloca.h>
typedef signed short ogg_int16_t;
typedef signed int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef signed long long ogg_int64_t;
#elif defined (GEKKO)
#if defined(PLATFORM_WII)
#include <alloca.h>
#else
#if defined(__MWERKS__)
#define alloca __alloca
#endif
#endif
/* Gamecube */
typedef short ogg_int16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#elif defined (__psp__)
typedef short ogg_int16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#elif defined (__sun) || defined (__linux__)
typedef short ogg_int16_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef long long ogg_int64_t;
#else
# include <sys/types.h>
# include <ogg/config_types.h>
#endif
#endif /* _OS_TYPES_H */

286
fmod/lib/ogg_vorbis/ogg/src/bitwise.c Executable file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: packing variable sized words into an octet stream
last mod: $Id: bitwise.c 16051 2009-05-27 05:00:06Z xiphmont $
********************************************************************/
/* We're 'LSb' endian; if we write a word but read individual bits,
then we'll read the lsb first */
#include <string.h>
#include <stdlib.h>
#include <ogg/ogg.h>
#define BUFFER_INCREMENT 256
static const ogg_uint32_t mask[]=
{0x00000000,0x00000001,0x00000003,0x00000007,0x0000000f,
0x0000001f,0x0000003f,0x0000007f,0x000000ff,0x000001ff,
0x000003ff,0x000007ff,0x00000fff,0x00001fff,0x00003fff,
0x00007fff,0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,
0x000fffff,0x001fffff,0x003fffff,0x007fffff,0x00ffffff,
0x01ffffff,0x03ffffff,0x07ffffff,0x0fffffff,0x1fffffff,
0x3fffffff,0x7fffffff,0xffffffff };
void FMOD_oggpack_reset(oggpack_buffer *b){
if(!b->ptr)return;
b->ptr=b->buffer;
b->buffer[0]=0;
b->endbit=b->endbyte=0;
}
void FMOD_oggpackB_reset(oggpack_buffer *b){
FMOD_oggpack_reset(b);
}
void FMOD_oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
FMOD_memset(b,0,sizeof(*b));
b->buffer=b->ptr=buf;
b->storage=bytes;
}
void FMOD_oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
FMOD_oggpack_readinit(b,buf,bytes);
}
/* Read in bits without advancing the bitptr; bits <= 32 */
ogg_int32_t FMOD_oggpack_look(oggpack_buffer *b,int bits){
ogg_uint32_t ret;
ogg_uint32_t m=mask[bits];
bits+=b->endbit;
if(b->endbyte+4>=b->storage){
/* not the main path */
if(b->endbyte*8+bits>b->storage*8)return(-1);
}
ret=b->ptr[0]>>b->endbit;
if(bits>8){
ret|=b->ptr[1]<<(8-b->endbit);
if(bits>16){
ret|=b->ptr[2]<<(16-b->endbit);
if(bits>24){
ret|=b->ptr[3]<<(24-b->endbit);
if(bits>32 && b->endbit)
ret|=b->ptr[4]<<(32-b->endbit);
}
}
}
return(m&ret);
}
/* Read in bits without advancing the bitptr; bits <= 32 */
ogg_int32_t FMOD_oggpackB_look(oggpack_buffer *b,int bits){
ogg_uint32_t ret;
int m=32-bits;
bits+=b->endbit;
if(b->endbyte+4>=b->storage){
/* not the main path */
if(b->endbyte*8+bits>b->storage*8)return(-1);
}
ret=b->ptr[0]<<(24+b->endbit);
if(bits>8){
ret|=b->ptr[1]<<(16+b->endbit);
if(bits>16){
ret|=b->ptr[2]<<(8+b->endbit);
if(bits>24){
ret|=b->ptr[3]<<(b->endbit);
if(bits>32 && b->endbit)
ret|=b->ptr[4]>>(8-b->endbit);
}
}
}
return ((ret&0xffffffff)>>(m>>1))>>((m+1)>>1);
}
ogg_int32_t FMOD_oggpack_look1(oggpack_buffer *b){
if(b->endbyte>=b->storage)return(-1);
return((b->ptr[0]>>b->endbit)&1);
}
ogg_int32_t FMOD_oggpackB_look1(oggpack_buffer *b){
if(b->endbyte>=b->storage)return(-1);
return((b->ptr[0]>>(7-b->endbit))&1);
}
void FMOD_oggpack_adv(oggpack_buffer *b,int bits){
bits+=b->endbit;
b->ptr+=bits/8;
b->endbyte+=bits/8;
b->endbit=bits&7;
}
void FMOD_oggpackB_adv(oggpack_buffer *b,int bits){
FMOD_oggpack_adv(b,bits);
}
void FMOD_oggpack_adv1(oggpack_buffer *b){
if(++(b->endbit)>7){
b->endbit=0;
b->ptr++;
b->endbyte++;
}
}
void FMOD_oggpackB_adv1(oggpack_buffer *b){
FMOD_oggpack_adv1(b);
}
/* bits <= 32 */
ogg_int32_t FMOD_oggpack_read(oggpack_buffer *b,int bits){
ogg_int32_t ret;
ogg_uint32_t m=mask[bits];
bits+=b->endbit;
if(b->endbyte+4>=b->storage){
/* not the main path */
ret=-1;
if(b->endbyte*8+bits>b->storage*8)goto overflow;
}
ret=b->ptr[0]>>b->endbit;
if(bits>8){
ret|=b->ptr[1]<<(8-b->endbit);
if(bits>16){
ret|=b->ptr[2]<<(16-b->endbit);
if(bits>24){
ret|=b->ptr[3]<<(24-b->endbit);
if(bits>32 && b->endbit){
ret|=b->ptr[4]<<(32-b->endbit);
}
}
}
}
ret&=m;
overflow:
b->ptr+=bits/8;
b->endbyte+=bits/8;
b->endbit=bits&7;
return(ret);
}
/* bits <= 32 */
ogg_int32_t FMOD_oggpackB_read(oggpack_buffer *b,int bits){
ogg_int32_t ret;
ogg_int32_t m=32-bits;
bits+=b->endbit;
if(b->endbyte+4>=b->storage){
/* not the main path */
ret=-1;
if(b->endbyte*8+bits>b->storage*8)goto overflow;
/* special case to avoid reading b->ptr[0], which might be past the end of
the buffer; also skips some useless accounting */
else if(!bits)return(0);
}
ret=b->ptr[0]<<(24+b->endbit);
if(bits>8){
ret|=b->ptr[1]<<(16+b->endbit);
if(bits>16){
ret|=b->ptr[2]<<(8+b->endbit);
if(bits>24){
ret|=b->ptr[3]<<(b->endbit);
if(bits>32 && b->endbit)
ret|=b->ptr[4]>>(8-b->endbit);
}
}
}
ret=((ret&0xffffffff)>>(m>>1))>>((m+1)>>1);
overflow:
b->ptr+=bits/8;
b->endbyte+=bits/8;
b->endbit=bits&7;
return(ret);
}
ogg_int32_t FMOD_oggpack_read1(oggpack_buffer *b){
ogg_int32_t ret;
if(b->endbyte>=b->storage){
/* not the main path */
ret=-1;
goto overflow;
}
ret=(b->ptr[0]>>b->endbit)&1;
overflow:
b->endbit++;
if(b->endbit>7){
b->endbit=0;
b->ptr++;
b->endbyte++;
}
return(ret);
}
ogg_int32_t FMOD_oggpackB_read1(oggpack_buffer *b){
ogg_int32_t ret;
if(b->endbyte>=b->storage){
/* not the main path */
ret=-1;
goto overflow;
}
ret=(b->ptr[0]>>(7-b->endbit))&1;
overflow:
b->endbit++;
if(b->endbit>7){
b->endbit=0;
b->ptr++;
b->endbyte++;
}
return(ret);
}
ogg_int32_t FMOD_oggpack_bytes(oggpack_buffer *b){
return(b->endbyte+(b->endbit+7)/8);
}
ogg_int32_t FMOD_oggpack_bits(oggpack_buffer *b){
return(b->endbyte*8+b->endbit);
}
ogg_int32_t FMOD_oggpackB_bytes(oggpack_buffer *b){
return FMOD_oggpack_bytes(b);
}
ogg_int32_t FMOD_oggpackB_bits(oggpack_buffer *b){
return FMOD_oggpack_bits(b);
}
unsigned char *FMOD_oggpack_get_buffer(oggpack_buffer *b){
return(b->buffer);
}
unsigned char *FMOD_oggpackB_get_buffer(oggpack_buffer *b){
return FMOD_oggpack_get_buffer(b);
}
#undef BUFFER_INCREMENT

964
fmod/lib/ogg_vorbis/ogg/src/framing.c Executable file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: code raw packets into framed OggSquish stream and
decode Ogg streams back into raw packets
last mod: $Id: framing.c 16051 2009-05-27 05:00:06Z xiphmont $
note: The CRC code is directly derived from public domain code by
Ross Williams (ross@guest.adelaide.edu.au). See docs/framing.html
for details.
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <ogg/ogg.h>
/* A complete description of Ogg framing exists in docs/framing.html */
int FMOD_ogg_page_version(const ogg_page *og){
return((int)(og->header[4]));
}
int FMOD_ogg_page_continued(const ogg_page *og){
return((int)(og->header[5]&0x01));
}
int FMOD_ogg_page_bos(const ogg_page *og){
return((int)(og->header[5]&0x02));
}
int FMOD_ogg_page_eos(const ogg_page *og){
return((int)(og->header[5]&0x04));
}
ogg_int64_t FMOD_ogg_page_granulepos(const ogg_page *og){
unsigned char *page=og->header;
ogg_int64_t granulepos=page[13]&(0xff);
granulepos= (granulepos<<8)|(page[12]&0xff);
granulepos= (granulepos<<8)|(page[11]&0xff);
granulepos= (granulepos<<8)|(page[10]&0xff);
granulepos= (granulepos<<8)|(page[9]&0xff);
granulepos= (granulepos<<8)|(page[8]&0xff);
granulepos= (granulepos<<8)|(page[7]&0xff);
granulepos= (granulepos<<8)|(page[6]&0xff);
return(granulepos);
}
int FMOD_ogg_page_serialno(const ogg_page *og){
return(og->header[14] |
(og->header[15]<<8) |
(og->header[16]<<16) |
(og->header[17]<<24));
}
ogg_int32_t FMOD_ogg_page_pageno(const ogg_page *og){
return(og->header[18] |
(og->header[19]<<8) |
(og->header[20]<<16) |
(og->header[21]<<24));
}
/* returns the number of packets that are completed on this page (if
the leading packet is begun on a previous page, but ends on this
page, it's counted */
/* NOTE:
If a page consists of a packet begun on a previous page, and a new
packet begun (but not completed) on this page, the return will be:
ogg_page_packets(page) ==1,
ogg_page_continued(page) !=0
If a page happens to be a single packet that was begun on a
previous page, and spans to the next page (in the case of a three or
more page packet), the return will be:
ogg_page_packets(page) ==0,
ogg_page_continued(page) !=0
*/
int FMOD_ogg_page_packets(const ogg_page *og){
int i,n=og->header[26],count=0;
for(i=0;i<n;i++)
if(og->header[27+i]<255)count++;
return(count);
}
static const ogg_uint32_t crc_lookup[256]={
0x00000000,0x04c11db7,0x09823b6e,0x0d4326d9,
0x130476dc,0x17c56b6b,0x1a864db2,0x1e475005,
0x2608edb8,0x22c9f00f,0x2f8ad6d6,0x2b4bcb61,
0x350c9b64,0x31cd86d3,0x3c8ea00a,0x384fbdbd,
0x4c11db70,0x48d0c6c7,0x4593e01e,0x4152fda9,
0x5f15adac,0x5bd4b01b,0x569796c2,0x52568b75,
0x6a1936c8,0x6ed82b7f,0x639b0da6,0x675a1011,
0x791d4014,0x7ddc5da3,0x709f7b7a,0x745e66cd,
0x9823b6e0,0x9ce2ab57,0x91a18d8e,0x95609039,
0x8b27c03c,0x8fe6dd8b,0x82a5fb52,0x8664e6e5,
0xbe2b5b58,0xbaea46ef,0xb7a96036,0xb3687d81,
0xad2f2d84,0xa9ee3033,0xa4ad16ea,0xa06c0b5d,
0xd4326d90,0xd0f37027,0xddb056fe,0xd9714b49,
0xc7361b4c,0xc3f706fb,0xceb42022,0xca753d95,
0xf23a8028,0xf6fb9d9f,0xfbb8bb46,0xff79a6f1,
0xe13ef6f4,0xe5ffeb43,0xe8bccd9a,0xec7dd02d,
0x34867077,0x30476dc0,0x3d044b19,0x39c556ae,
0x278206ab,0x23431b1c,0x2e003dc5,0x2ac12072,
0x128e9dcf,0x164f8078,0x1b0ca6a1,0x1fcdbb16,
0x018aeb13,0x054bf6a4,0x0808d07d,0x0cc9cdca,
0x7897ab07,0x7c56b6b0,0x71159069,0x75d48dde,
0x6b93dddb,0x6f52c06c,0x6211e6b5,0x66d0fb02,
0x5e9f46bf,0x5a5e5b08,0x571d7dd1,0x53dc6066,
0x4d9b3063,0x495a2dd4,0x44190b0d,0x40d816ba,
0xaca5c697,0xa864db20,0xa527fdf9,0xa1e6e04e,
0xbfa1b04b,0xbb60adfc,0xb6238b25,0xb2e29692,
0x8aad2b2f,0x8e6c3698,0x832f1041,0x87ee0df6,
0x99a95df3,0x9d684044,0x902b669d,0x94ea7b2a,
0xe0b41de7,0xe4750050,0xe9362689,0xedf73b3e,
0xf3b06b3b,0xf771768c,0xfa325055,0xfef34de2,
0xc6bcf05f,0xc27dede8,0xcf3ecb31,0xcbffd686,
0xd5b88683,0xd1799b34,0xdc3abded,0xd8fba05a,
0x690ce0ee,0x6dcdfd59,0x608edb80,0x644fc637,
0x7a089632,0x7ec98b85,0x738aad5c,0x774bb0eb,
0x4f040d56,0x4bc510e1,0x46863638,0x42472b8f,
0x5c007b8a,0x58c1663d,0x558240e4,0x51435d53,
0x251d3b9e,0x21dc2629,0x2c9f00f0,0x285e1d47,
0x36194d42,0x32d850f5,0x3f9b762c,0x3b5a6b9b,
0x0315d626,0x07d4cb91,0x0a97ed48,0x0e56f0ff,
0x1011a0fa,0x14d0bd4d,0x19939b94,0x1d528623,
0xf12f560e,0xf5ee4bb9,0xf8ad6d60,0xfc6c70d7,
0xe22b20d2,0xe6ea3d65,0xeba91bbc,0xef68060b,
0xd727bbb6,0xd3e6a601,0xdea580d8,0xda649d6f,
0xc423cd6a,0xc0e2d0dd,0xcda1f604,0xc960ebb3,
0xbd3e8d7e,0xb9ff90c9,0xb4bcb610,0xb07daba7,
0xae3afba2,0xaafbe615,0xa7b8c0cc,0xa379dd7b,
0x9b3660c6,0x9ff77d71,0x92b45ba8,0x9675461f,
0x8832161a,0x8cf30bad,0x81b02d74,0x857130c3,
0x5d8a9099,0x594b8d2e,0x5408abf7,0x50c9b640,
0x4e8ee645,0x4a4ffbf2,0x470cdd2b,0x43cdc09c,
0x7b827d21,0x7f436096,0x7200464f,0x76c15bf8,
0x68860bfd,0x6c47164a,0x61043093,0x65c52d24,
0x119b4be9,0x155a565e,0x18197087,0x1cd86d30,
0x029f3d35,0x065e2082,0x0b1d065b,0x0fdc1bec,
0x3793a651,0x3352bbe6,0x3e119d3f,0x3ad08088,
0x2497d08d,0x2056cd3a,0x2d15ebe3,0x29d4f654,
0xc5a92679,0xc1683bce,0xcc2b1d17,0xc8ea00a0,
0xd6ad50a5,0xd26c4d12,0xdf2f6bcb,0xdbee767c,
0xe3a1cbc1,0xe760d676,0xea23f0af,0xeee2ed18,
0xf0a5bd1d,0xf464a0aa,0xf9278673,0xfde69bc4,
0x89b8fd09,0x8d79e0be,0x803ac667,0x84fbdbd0,
0x9abc8bd5,0x9e7d9662,0x933eb0bb,0x97ffad0c,
0xafb010b1,0xab710d06,0xa6322bdf,0xa2f33668,
0xbcb4666d,0xb8757bda,0xb5365d03,0xb1f740b4};
/* init the encode/decode logical stream state */
int FMOD_ogg_stream_init(void *context, ogg_stream_state *os,int serialno){
if(os){
FMOD_memset(os,0,sizeof(*os));
#if 1
os->body_storage=(4*1024) + 512;
os->lacing_storage=64;
#else
os->body_storage=16*1024;
os->lacing_storage=1024;
#endif
os->body_data=_ogg_malloc(os->body_storage*sizeof(*os->body_data));
os->lacing_vals=_ogg_malloc(os->lacing_storage*sizeof(*os->lacing_vals));
os->granule_vals=_ogg_malloc(os->lacing_storage*sizeof(*os->granule_vals));
if(!os->body_data || !os->lacing_vals || !os->granule_vals){
FMOD_ogg_stream_clear(context, os);
return -1;
}
os->serialno=serialno;
return(0);
}
return(-1);
}
/* async/delayed error detection for the ogg_stream_state */
int FMOD_ogg_stream_check(ogg_stream_state *os){
if(!os || !os->body_data) return -1;
return 0;
}
/* _clear does not free os, only the non-flat storage within */
int FMOD_ogg_stream_clear(void *context, ogg_stream_state *os){
if(os){
if(os->body_data)_ogg_free(os->body_data);
if(os->lacing_vals)_ogg_free(os->lacing_vals);
if(os->granule_vals)_ogg_free(os->granule_vals);
FMOD_memset(os,0,sizeof(*os));
}
return(0);
}
int FMOD_ogg_stream_destroy(void *context, ogg_stream_state *os){
if(os){
FMOD_ogg_stream_clear(context, os);
_ogg_free(os);
}
return(0);
}
/* Helpers for ogg_stream_encode; this keeps the structure and
what's happening fairly clear */
static int _os_body_expand(void *context, ogg_stream_state *os,int needed){
if(os->body_storage<=os->body_fill+needed){
void *ret;
ret=_ogg_realloc(os->body_data,(os->body_storage+needed+1024)*
sizeof(*os->body_data));
if(!ret){
FMOD_ogg_stream_clear(context, os);
return -1;
}
os->body_storage+=(needed+1024);
os->body_data=ret;
}
return 0;
}
static int _os_lacing_expand(void *context, ogg_stream_state *os,int needed){
if(os->lacing_storage<=os->lacing_fill+needed){
void *ret;
ret=_ogg_realloc(os->lacing_vals,(os->lacing_storage+needed+32)*
sizeof(*os->lacing_vals));
if(!ret){
FMOD_ogg_stream_clear(context, os);
return -1;
}
os->lacing_vals=ret;
ret=_ogg_realloc(os->granule_vals,(os->lacing_storage+needed+32)*
sizeof(*os->granule_vals));
if(!ret){
FMOD_ogg_stream_clear(context, os);
return -1;
}
os->granule_vals=ret;
os->lacing_storage+=(needed+32);
}
return 0;
}
/* checksum the page */
/* Direct table CRC; note that this will be faster in the future if we
perform the checksum silmultaneously with other copies */
void FMOD_ogg_page_checksum_set(ogg_page *og){
if(og){
ogg_uint32_t crc_reg=0;
int i;
/* safety; needed for API behavior, but not framing code */
og->header[22]=0;
og->header[23]=0;
og->header[24]=0;
og->header[25]=0;
for(i=0;i<og->header_len;i++)
crc_reg=(crc_reg<<8)^crc_lookup[((crc_reg >> 24)&0xff)^og->header[i]];
for(i=0;i<og->body_len;i++)
crc_reg=(crc_reg<<8)^crc_lookup[((crc_reg >> 24)&0xff)^og->body[i]];
og->header[22]=(unsigned char)(crc_reg&0xff);
og->header[23]=(unsigned char)((crc_reg>>8)&0xff);
og->header[24]=(unsigned char)((crc_reg>>16)&0xff);
og->header[25]=(unsigned char)((crc_reg>>24)&0xff);
}
}
/* submit data to the internal buffer of the framing engine */
//int ogg_stream_iovecin(void *context, ogg_stream_state *os, ogg_iovec_t *iov, int count,
// ogg_int32_t e_o_s, ogg_int64_t granulepos){
//
// int bytes = 0, lacing_vals, i;
//
// if(FMOD_ogg_stream_check(os)) return -1;
// if(!iov) return 0;
//
// for (i = 0; i < count; ++i) bytes += (int)iov[i].iov_len;
// lacing_vals=bytes/255+1;
//
// if(os->body_returned){
// /* advance packet data according to the body_returned pointer. We
// had to keep it around to return a pointer into the buffer last
// call */
//
// os->body_fill-=os->body_returned;
// if(os->body_fill)
// memmove(os->body_data,os->body_data+os->body_returned,
// os->body_fill);
// os->body_returned=0;
// }
//
// /* make sure we have the buffer storage */
// if(_os_body_expand(context, os,bytes) || _os_lacing_expand(context, os,lacing_vals))
// return -1;
//
// /* Copy in the submitted packet. Yes, the copy is a waste; this is
// the liability of overly clean abstraction for the time being. It
// will actually be fairly easy to eliminate the extra copy in the
// future */
//
// for (i = 0; i < count; ++i) {
// FMOD_memcpy(os->body_data+os->body_fill, iov[i].iov_base, iov[i].iov_len);
// os->body_fill += (int)iov[i].iov_len;
// }
//
// /* Store lacing vals for this packet */
// for(i=0;i<lacing_vals-1;i++){
// os->lacing_vals[os->lacing_fill+i]=255;
// os->granule_vals[os->lacing_fill+i]=os->granulepos;
// }
// os->lacing_vals[os->lacing_fill+i]=bytes%255;
// os->granulepos=os->granule_vals[os->lacing_fill+i]=granulepos;
//
// /* flag the first segment as the beginning of the packet */
// os->lacing_vals[os->lacing_fill]|= 0x100;
//
// os->lacing_fill+=lacing_vals;
//
// /* for the sake of completeness */
// os->packetno++;
//
// if(e_o_s)os->e_o_s=1;
//
// return(0);
//}
//
//int FMOD_ogg_stream_packetin(void *context, ogg_stream_state *os,ogg_packet *op){
// ogg_iovec_t iov;
// iov.iov_base = op->packet;
// iov.iov_len = op->bytes;
// return ogg_stream_iovecin(context, os, &iov, 1, op->e_o_s, op->granulepos);
//}
//
///* This will flush remaining packets into a page (returning nonzero),
// even if there is not enough data to trigger a flush normally
// (undersized page). If there are no packets or partial packets to
// flush, ogg_stream_flush returns 0. Note that ogg_stream_flush will
// try to flush a normal sized page like ogg_stream_pageout; a call to
// ogg_stream_flush does not guarantee that all packets have flushed.
// Only a return value of 0 from ogg_stream_flush indicates all packet
// data is flushed into pages.
//
// since ogg_stream_flush will flush the last page in a stream even if
// it's undersized, you almost certainly want to use ogg_stream_pageout
// (and *not* ogg_stream_flush) unless you specifically need to flush
// an page regardless of size in the middle of a stream. */
//
//int FMOD_ogg_stream_flush(ogg_stream_state *os,ogg_page *og){
// int i;
// int vals=0;
// int maxvals=(os->lacing_fill>255?255:os->lacing_fill);
// int bytes=0;
// ogg_int32_t acc=0;
// ogg_int64_t granule_pos=-1;
//
// if(FMOD_ogg_stream_check(os)) return 0;
// if(maxvals==0)return 0;
//
// /* construct a page */
// /* decide how many segments to include */
//
// /* If this is the initial header case, the first page must only include
// the initial header packet */
// if(os->b_o_s==0){ /* 'initial header page' case */
// granule_pos=0;
// for(vals=0;vals<maxvals;vals++){
// if((os->lacing_vals[vals]&0x0ff)<255){
// vals++;
// break;
// }
// }
// }else{
// for(vals=0;vals<maxvals;vals++){
// if(acc>4096)break;
// acc+=os->lacing_vals[vals]&0x0ff;
// if((os->lacing_vals[vals]&0xff)<255)
// granule_pos=os->granule_vals[vals];
// }
// }
//
// /* construct the header in temp storage */
// FMOD_memcpy(os->header,"OggS",4);
//
// /* stream structure version */
// os->header[4]=0x00;
//
// /* continued packet flag? */
// os->header[5]=0x00;
// if((os->lacing_vals[0]&0x100)==0)os->header[5]|=0x01;
// /* first page flag? */
// if(os->b_o_s==0)os->header[5]|=0x02;
// /* last page flag? */
// if(os->e_o_s && os->lacing_fill==vals)os->header[5]|=0x04;
// os->b_o_s=1;
//
// /* 64 bits of PCM position */
// for(i=6;i<14;i++){
// os->header[i]=(unsigned char)(granule_pos&0xff);
// granule_pos>>=8;
// }
//
// /* 32 bits of stream serial number */
// {
// ogg_int32_t serialno=os->serialno;
// for(i=14;i<18;i++){
// os->header[i]=(unsigned char)(serialno&0xff);
// serialno>>=8;
// }
// }
//
// /* 32 bits of page counter (we have both counter and page header
// because this val can roll over) */
// if(os->pageno==-1)os->pageno=0; /* because someone called
// stream_reset; this would be a
// strange thing to do in an
// encode stream, but it has
// plausible uses */
// {
// ogg_int32_t pageno=os->pageno++;
// for(i=18;i<22;i++){
// os->header[i]=(unsigned char)(pageno&0xff);
// pageno>>=8;
// }
// }
//
// /* zero for computation; filled in later */
// os->header[22]=0;
// os->header[23]=0;
// os->header[24]=0;
// os->header[25]=0;
//
// /* segment table */
// os->header[26]=(unsigned char)(vals&0xff);
// for(i=0;i<vals;i++)
// bytes+=os->header[i+27]=(unsigned char)(os->lacing_vals[i]&0xff);
//
// /* set pointers in the ogg_page struct */
// og->header=os->header;
// og->header_len=os->header_fill=vals+27;
// og->body=os->body_data+os->body_returned;
// og->body_len=bytes;
//
// /* advance the lacing data and set the body_returned pointer */
//
// os->lacing_fill-=vals;
// memmove(os->lacing_vals,os->lacing_vals+vals,os->lacing_fill*sizeof(*os->lacing_vals));
// memmove(os->granule_vals,os->granule_vals+vals,os->lacing_fill*sizeof(*os->granule_vals));
// os->body_returned+=bytes;
//
// /* calculate the checksum */
//
// ogg_page_checksum_set(og);
//
// /* done */
// return(1);
//}
//
//
///* This constructs pages from buffered packet segments. The pointers
//returned are to static buffers; do not free. The returned buffers are
//good only until the next call (using the same ogg_stream_state) */
//
//int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og){
// if(FMOD_ogg_stream_check(os)) return 0;
//
// if((os->e_o_s&&os->lacing_fill) || /* 'were done, now flush' case */
// os->body_fill-os->body_returned > 4096 ||/* 'page nominal size' case */
// os->lacing_fill>=255 || /* 'segment table full' case */
// (os->lacing_fill&&!os->b_o_s)){ /* 'initial header page' case */
//
// return(ogg_stream_flush(os,og));
// }
//
// /* not enough data to construct a page and not end of stream */
// return 0;
//}
int FMOD_ogg_stream_eos(ogg_stream_state *os){
if(FMOD_ogg_stream_check(os)) return 1;
return os->e_o_s;
}
/* DECODING PRIMITIVES: packet streaming layer **********************/
/* This has two layers to place more of the multi-serialno and paging
control in the application's hands. First, we expose a data buffer
using ogg_sync_buffer(). The app either copies into the
buffer, or passes it directly to read(), etc. We then call
ogg_sync_wrote() to tell how many bytes we just added.
Pages are returned (pointers into the buffer in ogg_sync_state)
by ogg_sync_pageout(). The page is then submitted to
ogg_stream_pagein() along with the appropriate
ogg_stream_state* (ie, matching serialno). We then get raw
packets out calling ogg_stream_packetout() with a
ogg_stream_state. */
/* initialize the struct to a known state */
int FMOD_ogg_sync_init(ogg_sync_state *oy){
if(oy){
oy->storage = -1; /* used as a readiness flag */
FMOD_memset(oy,0,sizeof(*oy));
}
return(0);
}
/* clear non-flat storage within */
int FMOD_ogg_sync_clear(void *context, ogg_sync_state *oy){
if(oy){
if(oy->data)_ogg_free(oy->data);
FMOD_memset(oy,0,sizeof(*oy));
}
return(0);
}
int FMOD_ogg_sync_destroy(void *context, ogg_sync_state *oy){
if(oy){
FMOD_ogg_sync_clear(context, oy);
_ogg_free(oy);
}
return(0);
}
int FMOD_ogg_sync_check(ogg_sync_state *oy){
if(oy->storage<0) return -1;
return 0;
}
char *FMOD_ogg_sync_buffer(void *context, ogg_sync_state *oy, ogg_int32_t size){
if(FMOD_ogg_sync_check(oy)) return NULL;
/* first, clear out any space that has been previously returned */
if(oy->returned){
oy->fill-=oy->returned;
if(oy->fill>0)
memmove(oy->data,oy->data+oy->returned,oy->fill);
oy->returned=0;
}
if(size>oy->storage-oy->fill){
/* We need to extend the internal buffer */
ogg_int32_t newsize=size+oy->fill+4096; /* an extra page to be nice */
void *ret;
if(oy->data)
ret=_ogg_realloc(oy->data,newsize);
else
ret=_ogg_malloc(newsize);
oy->data = 0; /* Null out old pointer so clear doesnt fall over on bad/released data? */
if(!ret){
FMOD_ogg_sync_clear(context, oy);
return NULL;
}
oy->data=ret;
oy->storage=newsize;
}
/* expose a segment at least as large as requested at the fill mark */
return((char *)oy->data+oy->fill);
}
int FMOD_ogg_sync_wrote(ogg_sync_state *oy, ogg_int32_t bytes){
if(FMOD_ogg_sync_check(oy))return -1;
if(oy->fill+bytes>oy->storage)return -1;
oy->fill+=bytes;
return(0);
}
/* sync the stream. This is meant to be useful for finding page
boundaries.
return values for this:
-n) skipped n bytes
0) page not ready; more data (no bytes skipped)
n) page synced at current location; page length n bytes
*/
ogg_int32_t FMOD_ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og){
unsigned char *page=oy->data+oy->returned;
unsigned char *next;
ogg_int32_t bytes=oy->fill-oy->returned;
if(FMOD_ogg_sync_check(oy))return 0;
if(oy->headerbytes==0){
int headerbytes,i;
if(bytes<27)return(0); /* not enough for a header */
/* verify capture pattern */
if(memcmp(page,"OggS",4))goto sync_fail;
headerbytes=page[26]+27;
if(bytes<headerbytes)return(0); /* not enough for header + seg table */
/* count up body length in the segment table */
for(i=0;i<page[26];i++)
oy->bodybytes+=page[27+i];
oy->headerbytes=headerbytes;
}
if(oy->bodybytes+oy->headerbytes>bytes)return(0);
/* The whole test page is buffered. Verify the checksum */
{
/* Grab the checksum bytes, set the header field to zero */
char chksum[4];
ogg_page log;
FMOD_memcpy(chksum,page+22,4);
FMOD_memset(page+22,0,4);
/* set up a temp page struct and recompute the checksum */
log.header=page;
log.header_len=oy->headerbytes;
log.body=page+oy->headerbytes;
log.body_len=oy->bodybytes;
FMOD_ogg_page_checksum_set(&log);
/* Compare */
if(memcmp(chksum,page+22,4)){
/* D'oh. Mismatch! Corrupt page (or miscapture and not a page
at all) */
/* replace the computed checksum with the one actually read in */
FMOD_memcpy(page+22,chksum,4);
/* Bad checksum. Lose sync */
goto sync_fail;
}
}
/* yes, have a whole page all ready to go */
{
unsigned char *page=oy->data+oy->returned;
ogg_int32_t bytes;
if(og){
og->header=page;
og->header_len=oy->headerbytes;
og->body=page+oy->headerbytes;
og->body_len=oy->bodybytes;
}
oy->unsynced=0;
oy->returned+=(bytes=oy->headerbytes+oy->bodybytes);
oy->headerbytes=0;
oy->bodybytes=0;
return(bytes);
}
sync_fail:
oy->headerbytes=0;
oy->bodybytes=0;
/* search for possible capture */
next=memchr(page+1,'O',bytes-1);
if(!next)
next=oy->data+oy->fill;
oy->returned=(int)(next-oy->data);
return((ogg_int32_t)-(next-page));
}
/* sync the stream and get a page. Keep trying until we find a page.
Supress 'sync errors' after reporting the first.
return values:
-1) recapture (hole in data)
0) need more data
1) page returned
Returns pointers into buffered data; invalidated by next call to
_stream, _clear, _init, or _buffer */
int FMOD_ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og){
if(FMOD_ogg_sync_check(oy))return 0;
/* all we need to do is verify a page at the head of the stream
buffer. If it doesn't verify, we look for the next potential
frame */
for(;;){
ogg_int32_t ret=FMOD_ogg_sync_pageseek(oy,og);
if(ret>0){
/* have a page */
return(1);
}
if(ret==0){
/* need more data */
return(0);
}
/* head did not start a synced page... skipped some bytes */
if(!oy->unsynced){
oy->unsynced=1;
return(-1);
}
/* loop. keep looking */
}
}
/* add the incoming page to the stream state; we decompose the page
into packet segments here as well. */
int FMOD_ogg_stream_pagein(void *context, ogg_stream_state *os, ogg_page *og){
unsigned char *header=og->header;
unsigned char *body=og->body;
ogg_int32_t bodysize=og->body_len;
int segptr=0;
int version=FMOD_ogg_page_version(og);
int continued=FMOD_ogg_page_continued(og);
int bos=FMOD_ogg_page_bos(og);
int eos=FMOD_ogg_page_eos(og);
ogg_int64_t granulepos=FMOD_ogg_page_granulepos(og);
int serialno=FMOD_ogg_page_serialno(og);
ogg_int32_t pageno=FMOD_ogg_page_pageno(og);
int segments=header[26];
if(FMOD_ogg_stream_check(os)) return -1;
/* clean up 'returned data' */
{
ogg_int32_t lr=os->lacing_returned;
ogg_int32_t br=os->body_returned;
/* body data */
if(br){
os->body_fill-=br;
if(os->body_fill)
memmove(os->body_data,os->body_data+br,os->body_fill);
os->body_returned=0;
}
if(lr){
/* segment table */
if(os->lacing_fill-lr){
memmove(os->lacing_vals,os->lacing_vals+lr,
(os->lacing_fill-lr)*sizeof(*os->lacing_vals));
memmove(os->granule_vals,os->granule_vals+lr,
(os->lacing_fill-lr)*sizeof(*os->granule_vals));
}
os->lacing_fill-=lr;
os->lacing_packet-=lr;
os->lacing_returned=0;
}
}
/* check the serial number */
if(serialno!=os->serialno)return(-1);
if(version>0)return(-1);
if(_os_lacing_expand(context, os,segments+1)) return -1;
/* are we in sequence? */
if(pageno!=os->pageno){
int i;
/* unroll previous partial packet (if any) */
for(i=os->lacing_packet;i<os->lacing_fill;i++)
os->body_fill-=os->lacing_vals[i]&0xff;
os->lacing_fill=os->lacing_packet;
/* make a note of dropped data in segment table */
if(os->pageno!=-1){
os->lacing_vals[os->lacing_fill++]=0x400;
os->lacing_packet++;
}
}
/* are we a 'continued packet' page? If so, we may need to skip
some segments */
if(continued){
if(os->lacing_fill<1 ||
os->lacing_vals[os->lacing_fill-1]==0x400){
bos=0;
for(;segptr<segments;segptr++){
int val=header[27+segptr];
body+=val;
bodysize-=val;
if(val<255){
segptr++;
break;
}
}
}
}
if(bodysize){
if(_os_body_expand(context, os,bodysize)) return -1;
FMOD_memcpy(os->body_data+os->body_fill,body,bodysize);
os->body_fill+=bodysize;
}
{
int saved=-1;
while(segptr<segments){
int val=header[27+segptr];
os->lacing_vals[os->lacing_fill]=val;
os->granule_vals[os->lacing_fill]=-1;
if(bos){
os->lacing_vals[os->lacing_fill]|=0x100;
bos=0;
}
if(val<255)saved=os->lacing_fill;
os->lacing_fill++;
segptr++;
if(val<255)os->lacing_packet=os->lacing_fill;
}
/* set the granulepos on the last granuleval of the last full packet */
if(saved!=-1){
os->granule_vals[saved]=granulepos;
}
}
if(eos){
os->e_o_s=1;
if(os->lacing_fill>0)
os->lacing_vals[os->lacing_fill-1]|=0x200;
}
os->pageno=pageno+1;
return(0);
}
/* clear things to an initial state. Good to call, eg, before seeking */
int FMOD_ogg_sync_reset(ogg_sync_state *oy){
if(FMOD_ogg_sync_check(oy))return -1;
oy->fill=0;
oy->returned=0;
oy->unsynced=0;
oy->headerbytes=0;
oy->bodybytes=0;
return(0);
}
int FMOD_ogg_stream_reset(ogg_stream_state *os){
if(FMOD_ogg_stream_check(os)) return -1;
os->body_fill=0;
os->body_returned=0;
os->lacing_fill=0;
os->lacing_packet=0;
os->lacing_returned=0;
os->header_fill=0;
os->e_o_s=0;
os->b_o_s=0;
os->pageno=-1;
os->packetno=0;
os->granulepos=0;
return(0);
}
int FMOD_ogg_stream_reset_serialno(ogg_stream_state *os,int serialno){
if(FMOD_ogg_stream_check(os)) return -1;
FMOD_ogg_stream_reset(os);
os->serialno=serialno;
return(0);
}
static int _packetout(ogg_stream_state *os,ogg_packet *op,int adv){
/* The last part of decode. We have the stream broken into packet
segments. Now we need to group them into packets (or return the
out of sync markers) */
int ptr=os->lacing_returned;
if(os->lacing_packet<=ptr)return(0);
if(os->lacing_vals[ptr]&0x400){
/* we need to tell the codec there's a gap; it might need to
handle previous packet dependencies. */
os->lacing_returned++;
os->packetno++;
return(-1);
}
if(!op && !adv)return(1); /* just using peek as an inexpensive way
to ask if there's a whole packet
waiting */
/* Gather the whole packet. We'll have no holes or a partial packet */
{
int size=os->lacing_vals[ptr]&0xff;
int bytes=size;
int eos=os->lacing_vals[ptr]&0x200; /* last packet of the stream? */
int bos=os->lacing_vals[ptr]&0x100; /* first packet of the stream? */
while(size==255){
int val=os->lacing_vals[++ptr];
size=val&0xff;
if(val&0x200)eos=0x200;
bytes+=size;
}
if(op){
op->e_o_s=eos;
op->b_o_s=bos;
op->packet=os->body_data+os->body_returned;
op->packetno=os->packetno;
op->granulepos=os->granule_vals[ptr];
op->bytes=bytes;
}
if(adv){
os->body_returned+=bytes;
os->lacing_returned=ptr+1;
os->packetno++;
}
}
return(1);
}
int FMOD_ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op){
if(FMOD_ogg_stream_check(os)) return 0;
return _packetout(os,op,1);
}
int FMOD_ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op){
if(FMOD_ogg_stream_check(os)) return 0;
return _packetout(os,op,0);
}
void FMOD_ogg_packet_clear(void *context, ogg_packet *op) {
_ogg_free(op->packet);
FMOD_memset(op, 0, sizeof(*op));
}