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207 lines
6.5 KiB
C
207 lines
6.5 KiB
C
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/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
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* *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
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* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
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* *
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********************************************************************
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function: subsumed libogg includes
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********************************************************************/
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#ifndef _OGG_H
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#define _OGG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "os_types.h"
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typedef struct ogg_buffer_state{
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struct ogg_buffer *unused_buffers;
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struct ogg_reference *unused_references;
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int outstanding;
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int shutdown;
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} ogg_buffer_state;
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typedef struct ogg_buffer {
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unsigned char *data;
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long size;
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int refcount;
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union {
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ogg_buffer_state *owner;
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struct ogg_buffer *next;
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} ptr;
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} ogg_buffer;
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typedef struct ogg_reference {
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ogg_buffer *buffer;
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long begin;
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long length;
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struct ogg_reference *next;
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} ogg_reference;
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typedef struct oggpack_buffer {
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int headbit;
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unsigned char *headptr;
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long headend;
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/* memory management */
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ogg_reference *head;
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ogg_reference *tail;
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/* render the byte/bit counter API constant time */
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long count; /* doesn't count the tail */
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} oggpack_buffer;
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typedef struct oggbyte_buffer {
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ogg_reference *baseref;
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ogg_reference *ref;
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unsigned char *ptr;
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long pos;
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long end;
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} oggbyte_buffer;
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typedef struct ogg_sync_state {
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/* decode memory management pool */
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ogg_buffer_state *bufferpool;
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/* stream buffers */
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ogg_reference *fifo_head;
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ogg_reference *fifo_tail;
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long fifo_fill;
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/* stream sync management */
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int unsynced;
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int headerbytes;
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int bodybytes;
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} ogg_sync_state;
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typedef struct ogg_stream_state {
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ogg_reference *header_head;
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ogg_reference *header_tail;
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ogg_reference *body_head;
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ogg_reference *body_tail;
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int e_o_s; /* set when we have buffered the last
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packet in the logical bitstream */
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int b_o_s; /* set after we've written the initial page
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of a logical bitstream */
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long serialno;
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long pageno;
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ogg_int64_t packetno; /* sequence number for decode; the framing
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knows where there's a hole in the data,
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but we need coupling so that the codec
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(which is in a seperate abstraction
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layer) also knows about the gap */
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ogg_int64_t granulepos;
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int lacing_fill;
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ogg_uint32_t body_fill;
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/* decode-side state data */
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int holeflag;
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int spanflag;
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int clearflag;
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int laceptr;
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ogg_uint32_t body_fill_next;
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} ogg_stream_state;
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typedef struct {
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ogg_reference *packet;
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long bytes;
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long b_o_s;
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long e_o_s;
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ogg_int64_t granulepos;
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ogg_int64_t packetno; /* sequence number for decode; the framing
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knows where there's a hole in the data,
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but we need coupling so that the codec
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(which is in a seperate abstraction
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layer) also knows about the gap */
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} ogg_packet;
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typedef struct {
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ogg_reference *header;
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int header_len;
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ogg_reference *body;
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long body_len;
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} ogg_page;
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/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
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extern void oggpack_readinit(oggpack_buffer *b,ogg_reference *r);
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extern long oggpack_look(oggpack_buffer *b,int bits);
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extern void oggpack_adv(oggpack_buffer *b,int bits);
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extern long oggpack_read(oggpack_buffer *b,int bits);
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extern long oggpack_bytes(oggpack_buffer *b);
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extern long oggpack_bits(oggpack_buffer *b);
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extern int oggpack_eop(oggpack_buffer *b);
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/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
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extern ogg_sync_state *ogg_sync_create(void);
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extern int ogg_sync_destroy(ogg_sync_state *oy);
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extern int ogg_sync_reset(ogg_sync_state *oy);
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extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size);
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extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
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extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
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extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
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extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
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extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
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extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
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/* Ogg BITSTREAM PRIMITIVES: general ***************************/
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extern ogg_stream_state *ogg_stream_create(int serialno);
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extern int ogg_stream_destroy(ogg_stream_state *os);
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extern int ogg_stream_reset(ogg_stream_state *os);
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extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
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extern int ogg_stream_eos(ogg_stream_state *os);
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extern int ogg_page_checksum_set(ogg_page *og);
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extern int ogg_page_version(ogg_page *og);
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extern int ogg_page_continued(ogg_page *og);
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extern int ogg_page_bos(ogg_page *og);
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extern int ogg_page_eos(ogg_page *og);
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extern ogg_int64_t ogg_page_granulepos(ogg_page *og);
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extern ogg_uint32_t ogg_page_serialno(ogg_page *og);
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extern ogg_uint32_t ogg_page_pageno(ogg_page *og);
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extern int ogg_page_packets(ogg_page *og);
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extern int ogg_page_getbuffer(ogg_page *og, unsigned char **buffer);
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extern int ogg_packet_release(ogg_packet *op);
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extern int ogg_page_release(ogg_page *og);
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extern void ogg_page_dup(ogg_page *d, ogg_page *s);
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/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/
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#define OGG_SUCCESS 0
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#define OGG_HOLE -10
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#define OGG_SPAN -11
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#define OGG_EVERSION -12
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#define OGG_ESERIAL -13
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#define OGG_EINVAL -14
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#define OGG_EEOS -15
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#ifdef __cplusplus
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}
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#endif
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#endif /* _OGG_H */
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