| /******************************************************************** |
| * * |
| * 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 18044 2011-08-01 17:55:20Z gmaxwell $ |
| |
| ********************************************************************/ |
| #ifndef _OGG_H |
| #define _OGG_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include <stddef.h> |
| #include <ogg/os_types.h> |
| |
| typedef struct { |
| void *iov_base; |
| size_t iov_len; |
| } ogg_iovec_t; |
| |
| typedef struct { |
| long endbyte; |
| int endbit; |
| |
| unsigned char *buffer; |
| unsigned char *ptr; |
| long storage; |
| } oggpack_buffer; |
| |
| /* ogg_page is used to encapsulate the data in one Ogg bitstream page *****/ |
| |
| typedef struct { |
| unsigned char *header; |
| long header_len; |
| unsigned char *body; |
| long 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 */ |
| long body_storage; /* storage elements allocated */ |
| long body_fill; /* elements stored; fill mark */ |
| long 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 */ |
| long lacing_storage; |
| long lacing_fill; |
| long lacing_packet; |
| long 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 */ |
| long serialno; |
| long 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 separate abstraction |
| layer) also knows about the gap */ |
| ogg_int64_t 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; |
| long bytes; |
| long b_o_s; |
| long 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 separate 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 oggpack_writeinit(oggpack_buffer *b); |
| extern int oggpack_writecheck(oggpack_buffer *b); |
| extern void oggpack_writetrunc(oggpack_buffer *b,long bits); |
| extern void oggpack_writealign(oggpack_buffer *b); |
| extern void oggpack_writecopy(oggpack_buffer *b,void *source,long bits); |
| extern void oggpack_reset(oggpack_buffer *b); |
| extern void oggpack_writeclear(oggpack_buffer *b); |
| extern void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes); |
| extern void oggpack_write(oggpack_buffer *b,unsigned long value,int bits); |
| extern long oggpack_look(oggpack_buffer *b,int bits); |
| extern long oggpack_look1(oggpack_buffer *b); |
| extern void oggpack_adv(oggpack_buffer *b,int bits); |
| extern void oggpack_adv1(oggpack_buffer *b); |
| extern long oggpack_read(oggpack_buffer *b,int bits); |
| extern long oggpack_read1(oggpack_buffer *b); |
| extern long oggpack_bytes(oggpack_buffer *b); |
| extern long oggpack_bits(oggpack_buffer *b); |
| extern unsigned char *oggpack_get_buffer(oggpack_buffer *b); |
| |
| extern void oggpackB_writeinit(oggpack_buffer *b); |
| extern int oggpackB_writecheck(oggpack_buffer *b); |
| extern void oggpackB_writetrunc(oggpack_buffer *b,long bits); |
| extern void oggpackB_writealign(oggpack_buffer *b); |
| extern void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits); |
| extern void oggpackB_reset(oggpack_buffer *b); |
| extern void oggpackB_writeclear(oggpack_buffer *b); |
| extern void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes); |
| extern void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits); |
| extern long oggpackB_look(oggpack_buffer *b,int bits); |
| extern long oggpackB_look1(oggpack_buffer *b); |
| extern void oggpackB_adv(oggpack_buffer *b,int bits); |
| extern void oggpackB_adv1(oggpack_buffer *b); |
| extern long oggpackB_read(oggpack_buffer *b,int bits); |
| extern long oggpackB_read1(oggpack_buffer *b); |
| extern long oggpackB_bytes(oggpack_buffer *b); |
| extern long oggpackB_bits(oggpack_buffer *b); |
| extern unsigned char *oggpackB_get_buffer(oggpack_buffer *b); |
| |
| /* Ogg BITSTREAM PRIMITIVES: encoding **************************/ |
| |
| extern int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op); |
| extern int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov, |
| int count, long e_o_s, ogg_int64_t granulepos); |
| extern int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og); |
| extern int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill); |
| extern int ogg_stream_flush(ogg_stream_state *os, ogg_page *og); |
| extern int ogg_stream_flush_fill(ogg_stream_state *os, ogg_page *og, int nfill); |
| |
| /* Ogg BITSTREAM PRIMITIVES: decoding **************************/ |
| |
| extern int ogg_sync_init(ogg_sync_state *oy); |
| extern int ogg_sync_clear(ogg_sync_state *oy); |
| extern int ogg_sync_reset(ogg_sync_state *oy); |
| extern int ogg_sync_destroy(ogg_sync_state *oy); |
| extern int ogg_sync_check(ogg_sync_state *oy); |
| |
| extern char *ogg_sync_buffer(ogg_sync_state *oy, long size); |
| extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes); |
| extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og); |
| extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og); |
| extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og); |
| extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op); |
| extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op); |
| |
| /* Ogg BITSTREAM PRIMITIVES: general ***************************/ |
| |
| extern int ogg_stream_init(ogg_stream_state *os,int serialno); |
| extern int ogg_stream_clear(ogg_stream_state *os); |
| extern int ogg_stream_reset(ogg_stream_state *os); |
| extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno); |
| extern int ogg_stream_destroy(ogg_stream_state *os); |
| extern int ogg_stream_check(ogg_stream_state *os); |
| extern int ogg_stream_eos(ogg_stream_state *os); |
| |
| extern void ogg_page_checksum_set(ogg_page *og); |
| |
| extern int ogg_page_version(const ogg_page *og); |
| extern int ogg_page_continued(const ogg_page *og); |
| extern int ogg_page_bos(const ogg_page *og); |
| extern int ogg_page_eos(const ogg_page *og); |
| extern ogg_int64_t ogg_page_granulepos(const ogg_page *og); |
| extern int ogg_page_serialno(const ogg_page *og); |
| extern long ogg_page_pageno(const ogg_page *og); |
| extern int ogg_page_packets(const ogg_page *og); |
| |
| extern void ogg_packet_clear(ogg_packet *op); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _OGG_H */ |
