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path: root/core/multimedia/opieplayer/vorbis/tremor/ogg.h
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1/********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
4 * *
5 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
6 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
7 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * *
9 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
10 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
11 * *
12 ********************************************************************
13
14 function: subsumed libogg includes
15
16 ********************************************************************/
17#ifndef _OGG_H
18#define _OGG_H
19
20#ifdef __cplusplus
21extern "C" {
22#endif
23
24#include "os_types.h"
25
26typedef struct ogg_buffer_state{
27 struct ogg_buffer *unused_buffers;
28 struct ogg_reference *unused_references;
29 int outstanding;
30 int shutdown;
31} ogg_buffer_state;
32
33typedef struct ogg_buffer {
34 unsigned char *data;
35 long size;
36 int refcount;
37
38 union {
39 ogg_buffer_state *owner;
40 struct ogg_buffer *next;
41 } ptr;
42} ogg_buffer;
43
44typedef struct ogg_reference {
45 ogg_buffer *buffer;
46 long begin;
47 long length;
48
49 struct ogg_reference *next;
50} ogg_reference;
51
52typedef struct oggpack_buffer {
53 int headbit;
54 unsigned char *headptr;
55 long headend;
56
57 /* memory management */
58 ogg_reference *head;
59 ogg_reference *tail;
60
61 /* render the byte/bit counter API constant time */
62 long count; /* doesn't count the tail */
63} oggpack_buffer;
64
65typedef struct oggbyte_buffer {
66 ogg_reference *baseref;
67
68 ogg_reference *ref;
69 unsigned char *ptr;
70 long pos;
71 long end;
72} oggbyte_buffer;
73
74typedef struct ogg_sync_state {
75 /* decode memory management pool */
76 ogg_buffer_state *bufferpool;
77
78 /* stream buffers */
79 ogg_reference *fifo_head;
80 ogg_reference *fifo_tail;
81 long fifo_fill;
82
83 /* stream sync management */
84 int unsynced;
85 int headerbytes;
86 int bodybytes;
87
88} ogg_sync_state;
89
90typedef struct ogg_stream_state {
91 ogg_reference *header_head;
92 ogg_reference *header_tail;
93 ogg_reference *body_head;
94 ogg_reference *body_tail;
95
96 int e_o_s; /* set when we have buffered the last
97 packet in the logical bitstream */
98 int b_o_s; /* set after we've written the initial page
99 of a logical bitstream */
100 long serialno;
101 long pageno;
102 ogg_int64_t packetno; /* sequence number for decode; the framing
103 knows where there's a hole in the data,
104 but we need coupling so that the codec
105 (which is in a seperate abstraction
106 layer) also knows about the gap */
107 ogg_int64_t granulepos;
108
109 int lacing_fill;
110 ogg_uint32_t body_fill;
111
112 /* decode-side state data */
113 int holeflag;
114 int spanflag;
115 int clearflag;
116 int laceptr;
117 ogg_uint32_t body_fill_next;
118
119} ogg_stream_state;
120
121typedef struct {
122 ogg_reference *packet;
123 long bytes;
124 long b_o_s;
125 long e_o_s;
126 ogg_int64_t granulepos;
127 ogg_int64_t packetno; /* sequence number for decode; the framing
128 knows where there's a hole in the data,
129 but we need coupling so that the codec
130 (which is in a seperate abstraction
131 layer) also knows about the gap */
132} ogg_packet;
133
134typedef struct {
135 ogg_reference *header;
136 int header_len;
137 ogg_reference *body;
138 long body_len;
139} ogg_page;
140
141/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
142
143extern void oggpack_readinit(oggpack_buffer *b,ogg_reference *r);
144extern long oggpack_look(oggpack_buffer *b,int bits);
145extern void oggpack_adv(oggpack_buffer *b,int bits);
146extern long oggpack_read(oggpack_buffer *b,int bits);
147extern long oggpack_bytes(oggpack_buffer *b);
148extern long oggpack_bits(oggpack_buffer *b);
149extern int oggpack_eop(oggpack_buffer *b);
150
151/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
152
153extern ogg_sync_state *ogg_sync_create(void);
154extern int ogg_sync_destroy(ogg_sync_state *oy);
155extern int ogg_sync_reset(ogg_sync_state *oy);
156
157extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size);
158extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
159extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
160extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
161extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
162extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
163extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
164
165/* Ogg BITSTREAM PRIMITIVES: general ***************************/
166
167extern ogg_stream_state *ogg_stream_create(int serialno);
168extern int ogg_stream_destroy(ogg_stream_state *os);
169extern int ogg_stream_reset(ogg_stream_state *os);
170extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
171extern int ogg_stream_eos(ogg_stream_state *os);
172
173extern int ogg_page_checksum_set(ogg_page *og);
174
175extern int ogg_page_version(ogg_page *og);
176extern int ogg_page_continued(ogg_page *og);
177extern int ogg_page_bos(ogg_page *og);
178extern int ogg_page_eos(ogg_page *og);
179extern ogg_int64_t ogg_page_granulepos(ogg_page *og);
180extern ogg_uint32_t ogg_page_serialno(ogg_page *og);
181extern ogg_uint32_t ogg_page_pageno(ogg_page *og);
182extern int ogg_page_packets(ogg_page *og);
183extern int ogg_page_getbuffer(ogg_page *og, unsigned char **buffer);
184
185extern int ogg_packet_release(ogg_packet *op);
186extern int ogg_page_release(ogg_page *og);
187
188extern void ogg_page_dup(ogg_page *d, ogg_page *s);
189
190/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/
191
192#define OGG_SUCCESS 0
193
194#define OGG_HOLE -10
195#define OGG_SPAN -11
196#define OGG_EVERSION -12
197#define OGG_ESERIAL -13
198#define OGG_EINVAL -14
199#define OGG_EEOS -15
200
201
202#ifdef __cplusplus
203}
204#endif
205
206#endif /* _OGG_H */