cannam@87: /******************************************************************** cannam@87: * * cannam@87: * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * cannam@87: * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * cannam@87: * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * cannam@87: * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * cannam@87: * * cannam@87: * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * cannam@87: * by the Xiph.Org Foundation http://www.xiph.org/ * cannam@87: * * cannam@87: ******************************************************************** cannam@87: cannam@87: function: toplevel libogg include cannam@87: last mod: $Id: ogg.h 18044 2011-08-01 17:55:20Z gmaxwell $ cannam@87: cannam@87: ********************************************************************/ cannam@87: #ifndef _OGG_H cannam@87: #define _OGG_H cannam@87: cannam@87: #ifdef __cplusplus cannam@87: extern "C" { cannam@87: #endif cannam@87: cannam@87: #include cannam@87: #include cannam@87: cannam@87: typedef struct { cannam@87: void *iov_base; cannam@87: size_t iov_len; cannam@87: } ogg_iovec_t; cannam@87: cannam@87: typedef struct { cannam@87: long endbyte; cannam@87: int endbit; cannam@87: cannam@87: unsigned char *buffer; cannam@87: unsigned char *ptr; cannam@87: long storage; cannam@87: } oggpack_buffer; cannam@87: cannam@87: /* ogg_page is used to encapsulate the data in one Ogg bitstream page *****/ cannam@87: cannam@87: typedef struct { cannam@87: unsigned char *header; cannam@87: long header_len; cannam@87: unsigned char *body; cannam@87: long body_len; cannam@87: } ogg_page; cannam@87: cannam@87: /* ogg_stream_state contains the current encode/decode state of a logical cannam@87: Ogg bitstream **********************************************************/ cannam@87: cannam@87: typedef struct { cannam@87: unsigned char *body_data; /* bytes from packet bodies */ cannam@87: long body_storage; /* storage elements allocated */ cannam@87: long body_fill; /* elements stored; fill mark */ cannam@87: long body_returned; /* elements of fill returned */ cannam@87: cannam@87: cannam@87: int *lacing_vals; /* The values that will go to the segment table */ cannam@87: ogg_int64_t *granule_vals; /* granulepos values for headers. Not compact cannam@87: this way, but it is simple coupled to the cannam@87: lacing fifo */ cannam@87: long lacing_storage; cannam@87: long lacing_fill; cannam@87: long lacing_packet; cannam@87: long lacing_returned; cannam@87: cannam@87: unsigned char header[282]; /* working space for header encode */ cannam@87: int header_fill; cannam@87: cannam@87: int e_o_s; /* set when we have buffered the last packet in the cannam@87: logical bitstream */ cannam@87: int b_o_s; /* set after we've written the initial page cannam@87: of a logical bitstream */ cannam@87: long serialno; cannam@87: long pageno; cannam@87: ogg_int64_t packetno; /* sequence number for decode; the framing cannam@87: knows where there's a hole in the data, cannam@87: but we need coupling so that the codec cannam@87: (which is in a separate abstraction cannam@87: layer) also knows about the gap */ cannam@87: ogg_int64_t granulepos; cannam@87: cannam@87: } ogg_stream_state; cannam@87: cannam@87: /* ogg_packet is used to encapsulate the data and metadata belonging cannam@87: to a single raw Ogg/Vorbis packet *************************************/ cannam@87: cannam@87: typedef struct { cannam@87: unsigned char *packet; cannam@87: long bytes; cannam@87: long b_o_s; cannam@87: long e_o_s; cannam@87: cannam@87: ogg_int64_t granulepos; cannam@87: cannam@87: ogg_int64_t packetno; /* sequence number for decode; the framing cannam@87: knows where there's a hole in the data, cannam@87: but we need coupling so that the codec cannam@87: (which is in a separate abstraction cannam@87: layer) also knows about the gap */ cannam@87: } ogg_packet; cannam@87: cannam@87: typedef struct { cannam@87: unsigned char *data; cannam@87: int storage; cannam@87: int fill; cannam@87: int returned; cannam@87: cannam@87: int unsynced; cannam@87: int headerbytes; cannam@87: int bodybytes; cannam@87: } ogg_sync_state; cannam@87: cannam@87: /* Ogg BITSTREAM PRIMITIVES: bitstream ************************/ cannam@87: cannam@87: extern void oggpack_writeinit(oggpack_buffer *b); cannam@87: extern int oggpack_writecheck(oggpack_buffer *b); cannam@87: extern void oggpack_writetrunc(oggpack_buffer *b,long bits); cannam@87: extern void oggpack_writealign(oggpack_buffer *b); cannam@87: extern void oggpack_writecopy(oggpack_buffer *b,void *source,long bits); cannam@87: extern void oggpack_reset(oggpack_buffer *b); cannam@87: extern void oggpack_writeclear(oggpack_buffer *b); cannam@87: extern void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes); cannam@87: extern void oggpack_write(oggpack_buffer *b,unsigned long value,int bits); cannam@87: extern long oggpack_look(oggpack_buffer *b,int bits); cannam@87: extern long oggpack_look1(oggpack_buffer *b); cannam@87: extern void oggpack_adv(oggpack_buffer *b,int bits); cannam@87: extern void oggpack_adv1(oggpack_buffer *b); cannam@87: extern long oggpack_read(oggpack_buffer *b,int bits); cannam@87: extern long oggpack_read1(oggpack_buffer *b); cannam@87: extern long oggpack_bytes(oggpack_buffer *b); cannam@87: extern long oggpack_bits(oggpack_buffer *b); cannam@87: extern unsigned char *oggpack_get_buffer(oggpack_buffer *b); cannam@87: cannam@87: extern void oggpackB_writeinit(oggpack_buffer *b); cannam@87: extern int oggpackB_writecheck(oggpack_buffer *b); cannam@87: extern void oggpackB_writetrunc(oggpack_buffer *b,long bits); cannam@87: extern void oggpackB_writealign(oggpack_buffer *b); cannam@87: extern void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits); cannam@87: extern void oggpackB_reset(oggpack_buffer *b); cannam@87: extern void oggpackB_writeclear(oggpack_buffer *b); cannam@87: extern void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes); cannam@87: extern void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits); cannam@87: extern long oggpackB_look(oggpack_buffer *b,int bits); cannam@87: extern long oggpackB_look1(oggpack_buffer *b); cannam@87: extern void oggpackB_adv(oggpack_buffer *b,int bits); cannam@87: extern void oggpackB_adv1(oggpack_buffer *b); cannam@87: extern long oggpackB_read(oggpack_buffer *b,int bits); cannam@87: extern long oggpackB_read1(oggpack_buffer *b); cannam@87: extern long oggpackB_bytes(oggpack_buffer *b); cannam@87: extern long oggpackB_bits(oggpack_buffer *b); cannam@87: extern unsigned char *oggpackB_get_buffer(oggpack_buffer *b); cannam@87: cannam@87: /* Ogg BITSTREAM PRIMITIVES: encoding **************************/ cannam@87: cannam@87: extern int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op); cannam@87: extern int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov, cannam@87: int count, long e_o_s, ogg_int64_t granulepos); cannam@87: extern int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og); cannam@87: extern int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill); cannam@87: extern int ogg_stream_flush(ogg_stream_state *os, ogg_page *og); cannam@87: extern int ogg_stream_flush_fill(ogg_stream_state *os, ogg_page *og, int nfill); cannam@87: cannam@87: /* Ogg BITSTREAM PRIMITIVES: decoding **************************/ cannam@87: cannam@87: extern int ogg_sync_init(ogg_sync_state *oy); cannam@87: extern int ogg_sync_clear(ogg_sync_state *oy); cannam@87: extern int ogg_sync_reset(ogg_sync_state *oy); cannam@87: extern int ogg_sync_destroy(ogg_sync_state *oy); cannam@87: extern int ogg_sync_check(ogg_sync_state *oy); cannam@87: cannam@87: extern char *ogg_sync_buffer(ogg_sync_state *oy, long size); cannam@87: extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes); cannam@87: extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og); cannam@87: extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og); cannam@87: extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og); cannam@87: extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op); cannam@87: extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op); cannam@87: cannam@87: /* Ogg BITSTREAM PRIMITIVES: general ***************************/ cannam@87: cannam@87: extern int ogg_stream_init(ogg_stream_state *os,int serialno); cannam@87: extern int ogg_stream_clear(ogg_stream_state *os); cannam@87: extern int ogg_stream_reset(ogg_stream_state *os); cannam@87: extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno); cannam@87: extern int ogg_stream_destroy(ogg_stream_state *os); cannam@87: extern int ogg_stream_check(ogg_stream_state *os); cannam@87: extern int ogg_stream_eos(ogg_stream_state *os); cannam@87: cannam@87: extern void ogg_page_checksum_set(ogg_page *og); cannam@87: cannam@87: extern int ogg_page_version(const ogg_page *og); cannam@87: extern int ogg_page_continued(const ogg_page *og); cannam@87: extern int ogg_page_bos(const ogg_page *og); cannam@87: extern int ogg_page_eos(const ogg_page *og); cannam@87: extern ogg_int64_t ogg_page_granulepos(const ogg_page *og); cannam@87: extern int ogg_page_serialno(const ogg_page *og); cannam@87: extern long ogg_page_pageno(const ogg_page *og); cannam@87: extern int ogg_page_packets(const ogg_page *og); cannam@87: cannam@87: extern void ogg_packet_clear(ogg_packet *op); cannam@87: cannam@87: cannam@87: #ifdef __cplusplus cannam@87: } cannam@87: #endif cannam@87: cannam@87: #endif /* _OGG_H */