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annotate libs/ogg/ogg.h @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /********************************************************************
nuclear@0 2 * *
nuclear@0 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
nuclear@0 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
nuclear@0 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
nuclear@0 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
nuclear@0 7 * *
nuclear@0 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
nuclear@0 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
nuclear@0 10 * *
nuclear@0 11 ********************************************************************
nuclear@0 12
nuclear@0 13 function: toplevel libogg include
nuclear@0 14 last mod: $Id: ogg.h 18044 2011-08-01 17:55:20Z gmaxwell $
nuclear@0 15
nuclear@0 16 ********************************************************************/
nuclear@0 17 #ifndef _OGG_H
nuclear@0 18 #define _OGG_H
nuclear@0 19
nuclear@0 20 #ifdef __cplusplus
nuclear@0 21 extern "C" {
nuclear@0 22 #endif
nuclear@0 23
nuclear@0 24 #include <stddef.h>
nuclear@0 25 #include <ogg/os_types.h>
nuclear@0 26
nuclear@0 27 typedef struct {
nuclear@0 28 void *iov_base;
nuclear@0 29 size_t iov_len;
nuclear@0 30 } ogg_iovec_t;
nuclear@0 31
nuclear@0 32 typedef struct {
nuclear@0 33 long endbyte;
nuclear@0 34 int endbit;
nuclear@0 35
nuclear@0 36 unsigned char *buffer;
nuclear@0 37 unsigned char *ptr;
nuclear@0 38 long storage;
nuclear@0 39 } oggpack_buffer;
nuclear@0 40
nuclear@0 41 /* ogg_page is used to encapsulate the data in one Ogg bitstream page *****/
nuclear@0 42
nuclear@0 43 typedef struct {
nuclear@0 44 unsigned char *header;
nuclear@0 45 long header_len;
nuclear@0 46 unsigned char *body;
nuclear@0 47 long body_len;
nuclear@0 48 } ogg_page;
nuclear@0 49
nuclear@0 50 /* ogg_stream_state contains the current encode/decode state of a logical
nuclear@0 51 Ogg bitstream **********************************************************/
nuclear@0 52
nuclear@0 53 typedef struct {
nuclear@0 54 unsigned char *body_data; /* bytes from packet bodies */
nuclear@0 55 long body_storage; /* storage elements allocated */
nuclear@0 56 long body_fill; /* elements stored; fill mark */
nuclear@0 57 long body_returned; /* elements of fill returned */
nuclear@0 58
nuclear@0 59
nuclear@0 60 int *lacing_vals; /* The values that will go to the segment table */
nuclear@0 61 ogg_int64_t *granule_vals; /* granulepos values for headers. Not compact
nuclear@0 62 this way, but it is simple coupled to the
nuclear@0 63 lacing fifo */
nuclear@0 64 long lacing_storage;
nuclear@0 65 long lacing_fill;
nuclear@0 66 long lacing_packet;
nuclear@0 67 long lacing_returned;
nuclear@0 68
nuclear@0 69 unsigned char header[282]; /* working space for header encode */
nuclear@0 70 int header_fill;
nuclear@0 71
nuclear@0 72 int e_o_s; /* set when we have buffered the last packet in the
nuclear@0 73 logical bitstream */
nuclear@0 74 int b_o_s; /* set after we've written the initial page
nuclear@0 75 of a logical bitstream */
nuclear@0 76 long serialno;
nuclear@0 77 long pageno;
nuclear@0 78 ogg_int64_t packetno; /* sequence number for decode; the framing
nuclear@0 79 knows where there's a hole in the data,
nuclear@0 80 but we need coupling so that the codec
nuclear@0 81 (which is in a separate abstraction
nuclear@0 82 layer) also knows about the gap */
nuclear@0 83 ogg_int64_t granulepos;
nuclear@0 84
nuclear@0 85 } ogg_stream_state;
nuclear@0 86
nuclear@0 87 /* ogg_packet is used to encapsulate the data and metadata belonging
nuclear@0 88 to a single raw Ogg/Vorbis packet *************************************/
nuclear@0 89
nuclear@0 90 typedef struct {
nuclear@0 91 unsigned char *packet;
nuclear@0 92 long bytes;
nuclear@0 93 long b_o_s;
nuclear@0 94 long e_o_s;
nuclear@0 95
nuclear@0 96 ogg_int64_t granulepos;
nuclear@0 97
nuclear@0 98 ogg_int64_t packetno; /* sequence number for decode; the framing
nuclear@0 99 knows where there's a hole in the data,
nuclear@0 100 but we need coupling so that the codec
nuclear@0 101 (which is in a separate abstraction
nuclear@0 102 layer) also knows about the gap */
nuclear@0 103 } ogg_packet;
nuclear@0 104
nuclear@0 105 typedef struct {
nuclear@0 106 unsigned char *data;
nuclear@0 107 int storage;
nuclear@0 108 int fill;
nuclear@0 109 int returned;
nuclear@0 110
nuclear@0 111 int unsynced;
nuclear@0 112 int headerbytes;
nuclear@0 113 int bodybytes;
nuclear@0 114 } ogg_sync_state;
nuclear@0 115
nuclear@0 116 /* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
nuclear@0 117
nuclear@0 118 extern void oggpack_writeinit(oggpack_buffer *b);
nuclear@0 119 extern int oggpack_writecheck(oggpack_buffer *b);
nuclear@0 120 extern void oggpack_writetrunc(oggpack_buffer *b,long bits);
nuclear@0 121 extern void oggpack_writealign(oggpack_buffer *b);
nuclear@0 122 extern void oggpack_writecopy(oggpack_buffer *b,void *source,long bits);
nuclear@0 123 extern void oggpack_reset(oggpack_buffer *b);
nuclear@0 124 extern void oggpack_writeclear(oggpack_buffer *b);
nuclear@0 125 extern void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
nuclear@0 126 extern void oggpack_write(oggpack_buffer *b,unsigned long value,int bits);
nuclear@0 127 extern long oggpack_look(oggpack_buffer *b,int bits);
nuclear@0 128 extern long oggpack_look1(oggpack_buffer *b);
nuclear@0 129 extern void oggpack_adv(oggpack_buffer *b,int bits);
nuclear@0 130 extern void oggpack_adv1(oggpack_buffer *b);
nuclear@0 131 extern long oggpack_read(oggpack_buffer *b,int bits);
nuclear@0 132 extern long oggpack_read1(oggpack_buffer *b);
nuclear@0 133 extern long oggpack_bytes(oggpack_buffer *b);
nuclear@0 134 extern long oggpack_bits(oggpack_buffer *b);
nuclear@0 135 extern unsigned char *oggpack_get_buffer(oggpack_buffer *b);
nuclear@0 136
nuclear@0 137 extern void oggpackB_writeinit(oggpack_buffer *b);
nuclear@0 138 extern int oggpackB_writecheck(oggpack_buffer *b);
nuclear@0 139 extern void oggpackB_writetrunc(oggpack_buffer *b,long bits);
nuclear@0 140 extern void oggpackB_writealign(oggpack_buffer *b);
nuclear@0 141 extern void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits);
nuclear@0 142 extern void oggpackB_reset(oggpack_buffer *b);
nuclear@0 143 extern void oggpackB_writeclear(oggpack_buffer *b);
nuclear@0 144 extern void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
nuclear@0 145 extern void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits);
nuclear@0 146 extern long oggpackB_look(oggpack_buffer *b,int bits);
nuclear@0 147 extern long oggpackB_look1(oggpack_buffer *b);
nuclear@0 148 extern void oggpackB_adv(oggpack_buffer *b,int bits);
nuclear@0 149 extern void oggpackB_adv1(oggpack_buffer *b);
nuclear@0 150 extern long oggpackB_read(oggpack_buffer *b,int bits);
nuclear@0 151 extern long oggpackB_read1(oggpack_buffer *b);
nuclear@0 152 extern long oggpackB_bytes(oggpack_buffer *b);
nuclear@0 153 extern long oggpackB_bits(oggpack_buffer *b);
nuclear@0 154 extern unsigned char *oggpackB_get_buffer(oggpack_buffer *b);
nuclear@0 155
nuclear@0 156 /* Ogg BITSTREAM PRIMITIVES: encoding **************************/
nuclear@0 157
nuclear@0 158 extern int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op);
nuclear@0 159 extern int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov,
nuclear@0 160 int count, long e_o_s, ogg_int64_t granulepos);
nuclear@0 161 extern int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og);
nuclear@0 162 extern int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill);
nuclear@0 163 extern int ogg_stream_flush(ogg_stream_state *os, ogg_page *og);
nuclear@0 164 extern int ogg_stream_flush_fill(ogg_stream_state *os, ogg_page *og, int nfill);
nuclear@0 165
nuclear@0 166 /* Ogg BITSTREAM PRIMITIVES: decoding **************************/
nuclear@0 167
nuclear@0 168 extern int ogg_sync_init(ogg_sync_state *oy);
nuclear@0 169 extern int ogg_sync_clear(ogg_sync_state *oy);
nuclear@0 170 extern int ogg_sync_reset(ogg_sync_state *oy);
nuclear@0 171 extern int ogg_sync_destroy(ogg_sync_state *oy);
nuclear@0 172 extern int ogg_sync_check(ogg_sync_state *oy);
nuclear@0 173
nuclear@0 174 extern char *ogg_sync_buffer(ogg_sync_state *oy, long size);
nuclear@0 175 extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
nuclear@0 176 extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
nuclear@0 177 extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
nuclear@0 178 extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
nuclear@0 179 extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
nuclear@0 180 extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
nuclear@0 181
nuclear@0 182 /* Ogg BITSTREAM PRIMITIVES: general ***************************/
nuclear@0 183
nuclear@0 184 extern int ogg_stream_init(ogg_stream_state *os,int serialno);
nuclear@0 185 extern int ogg_stream_clear(ogg_stream_state *os);
nuclear@0 186 extern int ogg_stream_reset(ogg_stream_state *os);
nuclear@0 187 extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
nuclear@0 188 extern int ogg_stream_destroy(ogg_stream_state *os);
nuclear@0 189 extern int ogg_stream_check(ogg_stream_state *os);
nuclear@0 190 extern int ogg_stream_eos(ogg_stream_state *os);
nuclear@0 191
nuclear@0 192 extern void ogg_page_checksum_set(ogg_page *og);
nuclear@0 193
nuclear@0 194 extern int ogg_page_version(const ogg_page *og);
nuclear@0 195 extern int ogg_page_continued(const ogg_page *og);
nuclear@0 196 extern int ogg_page_bos(const ogg_page *og);
nuclear@0 197 extern int ogg_page_eos(const ogg_page *og);
nuclear@0 198 extern ogg_int64_t ogg_page_granulepos(const ogg_page *og);
nuclear@0 199 extern int ogg_page_serialno(const ogg_page *og);
nuclear@0 200 extern long ogg_page_pageno(const ogg_page *og);
nuclear@0 201 extern int ogg_page_packets(const ogg_page *og);
nuclear@0 202
nuclear@0 203 extern void ogg_packet_clear(ogg_packet *op);
nuclear@0 204
nuclear@0 205
nuclear@0 206 #ifdef __cplusplus
nuclear@0 207 }
nuclear@0 208 #endif
nuclear@0 209
nuclear@0 210 #endif /* _OGG_H */