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