/******************************************************************** * * * 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: code raw [Vorbis] packets into framed OggSquish stream and decode Ogg streams back into raw packets 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. ********************************************************************/ #ifndef _GF_OGG_H_ #define _GF_OGG_H_ #include #ifndef GPAC_DISABLE_OGG /*DON'T CLASH WITH OFFICIAL OGG IF ALREADY INCLUDED*/ #ifndef _OGG_H #ifdef __cplusplus extern "C" { #endif typedef struct { s32 endbyte; s32 endbit; unsigned char *buffer; unsigned char *ptr; s32 storage; } oggpack_buffer; /* ogg_page is used to encapsulate the data in one Ogg bitstream page *****/ typedef struct { unsigned char *header; s32 header_len; unsigned char *body; s32 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 */ s32 body_storage; /* storage elements allocated */ s32 body_fill; /* elements stored; fill mark */ s32 body_returned; /* elements of fill returned */ s32 *lacing_vals; /* The values that will go to the segment table */ s64 *granule_vals; /* granulepos values for headers. Not compact this way, but it is simple coupled to the lacing fifo */ s32 lacing_storage; s32 lacing_fill; s32 lacing_packet; s32 lacing_returned; unsigned char header[282]; /* working space for header encode */ s32 header_fill; s32 e_o_s; /* set when we have buffered the last packet in the logical bitstream */ s32 b_o_s; /* set after we've written the initial page of a logical bitstream */ s32 serialno; s32 pageno; s64 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 */ s64 granulepos; } ogg_stream_state; /* ogg_packet is used to encapsulate the data and metadata belonging to a single raw Ogg/Vorbis packet *************************************/ typedef struct { unsigned char *packet; s32 bytes; s32 b_o_s; s32 e_o_s; s64 granulepos; s64 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; s32 storage; s32 fill; s32 returned; s32 unsynced; s32 headerbytes; s32 bodybytes; } ogg_sync_state; /* Ogg BITSTREAM PRIMITIVES: bitstream ************************/ void oggpack_writeinit(oggpack_buffer *b); void oggpack_writetrunc(oggpack_buffer *b,s32 bits); void oggpack_writealign(oggpack_buffer *b); void oggpack_writecopy(oggpack_buffer *b,void *source,s32 bits); void oggpack_reset(oggpack_buffer *b); void oggpack_writeclear(oggpack_buffer *b); void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,s32 bytes); void oggpack_write(oggpack_buffer *b,u32 value,s32 bits); s32 oggpack_look(oggpack_buffer *b,s32 bits); s32 oggpack_look1(oggpack_buffer *b); void oggpack_adv(oggpack_buffer *b,s32 bits); void oggpack_adv1(oggpack_buffer *b); s32 oggpack_read(oggpack_buffer *b,s32 bits); s32 oggpack_read1(oggpack_buffer *b); s32 oggpack_bytes(oggpack_buffer *b); s32 oggpack_bits(oggpack_buffer *b); unsigned char *oggpack_get_buffer(oggpack_buffer *b); void oggpackB_writeinit(oggpack_buffer *b); void oggpackB_writetrunc(oggpack_buffer *b,s32 bits); void oggpackB_writealign(oggpack_buffer *b); void oggpackB_writecopy(oggpack_buffer *b,void *source,s32 bits); void oggpackB_reset(oggpack_buffer *b); void oggpackB_writeclear(oggpack_buffer *b); void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,s32 bytes); void oggpackB_write(oggpack_buffer *b,u32 value,s32 bits); s32 oggpackB_look(oggpack_buffer *b,s32 bits); s32 oggpackB_look1(oggpack_buffer *b); void oggpackB_adv(oggpack_buffer *b,s32 bits); void oggpackB_adv1(oggpack_buffer *b); s32 oggpackB_read(oggpack_buffer *b,s32 bits); s32 oggpackB_read1(oggpack_buffer *b); s32 oggpackB_bytes(oggpack_buffer *b); s32 oggpackB_bits(oggpack_buffer *b); unsigned char *oggpackB_get_buffer(oggpack_buffer *b); /* Ogg BITSTREAM PRIMITIVES: encoding **************************/ s32 ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op); s32 ogg_stream_pageout(ogg_stream_state *os, ogg_page *og); s32 ogg_stream_flush(ogg_stream_state *os, ogg_page *og); /* Ogg BITSTREAM PRIMITIVES: decoding **************************/ s32 ogg_sync_init(ogg_sync_state *oy); s32 ogg_sync_clear(ogg_sync_state *oy); s32 ogg_sync_reset(ogg_sync_state *oy); s32 ogg_sync_destroy(ogg_sync_state *oy); char *ogg_sync_buffer(ogg_sync_state *oy, s32 size); s32 ogg_sync_wrote(ogg_sync_state *oy, s32 bytes); s32 ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og); s32 ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og); s32 ogg_stream_pagein(ogg_stream_state *os, ogg_page *og); s32 ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op); s32 ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op); /* Ogg BITSTREAM PRIMITIVES: general ***************************/ s32 ogg_stream_init(ogg_stream_state *os,s32 serialno); s32 ogg_stream_clear(ogg_stream_state *os); s32 ogg_stream_reset(ogg_stream_state *os); s32 ogg_stream_reset_serialno(ogg_stream_state *os,s32 serialno); s32 ogg_stream_destroy(ogg_stream_state *os); s32 ogg_stream_eos(ogg_stream_state *os); void ogg_page_checksum_set(ogg_page *og); s32 ogg_page_version(ogg_page *og); s32 ogg_page_continued(ogg_page *og); s32 ogg_page_bos(ogg_page *og); s32 ogg_page_eos(ogg_page *og); s64 ogg_page_granulepos(ogg_page *og); s32 ogg_page_serialno(ogg_page *og); s32 ogg_page_pageno(ogg_page *og); s32 ogg_page_packets(ogg_page *og); void ogg_packet_clear(ogg_packet *op); #ifdef __cplusplus } #endif #endif /*_OGG_H*/ #endif /*GPAC_DISABLE_OGG*/ #endif /*_GF_OGG_H_*/