info.c 18.6 KB
Newer Older
Monty's avatar
   
Monty committed
1
2
/********************************************************************
 *                                                                  *
Monty's avatar
   
Monty committed
3
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Monty's avatar
   
Monty committed
4
5
6
 * 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.       *
Monty's avatar
   
Monty committed
7
 *                                                                  *
8
9
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
 * by the Xiph.Org Foundation http://www.xiph.org/                  *
10
 *                                                                  *
Monty's avatar
   
Monty committed
11
12
13
 ********************************************************************

 function: maintain the info structure, info <-> header packets
14
 last mod: $Id$
Monty's avatar
   
Monty committed
15
16
17

 ********************************************************************/

Monty's avatar
   
Monty committed
18
19
/* general handling of the header and the vorbis_info structure (and
   substructures) */
Monty's avatar
   
Monty committed
20
21
22

#include <stdlib.h>
#include <string.h>
Michael Smith's avatar
   
Michael Smith committed
23
#include <ctype.h>
Monty's avatar
   
Monty committed
24
#include <ogg/ogg.h>
Monty's avatar
   
Monty committed
25
#include "vorbis/codec.h"
Monty's avatar
   
Monty committed
26
27
#include "codec_internal.h"
#include "codebook.h"
Monty's avatar
   
Monty committed
28
#include "registry.h"
Monty's avatar
   
Monty committed
29
#include "window.h"
Monty's avatar
   
Monty committed
30
#include "psy.h"
Monty's avatar
   
Monty committed
31
#include "misc.h"
Monty's avatar
   
Monty committed
32
#include "os.h"
Monty's avatar
   
Monty committed
33

Monty's avatar
Monty committed
34
35
#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.2.3pre"
#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20090707"
36

Monty's avatar
   
Monty committed
37
/* helpers */
Monty's avatar
   
Monty committed
38
39
static int ilog2(unsigned int v){
  int ret=0;
Monty's avatar
   
Monty committed
40
41
  if(v)--v;
  while(v){
Monty's avatar
   
Monty committed
42
43
44
45
46
    ret++;
    v>>=1;
  }
  return(ret);
}
Monty's avatar
   
Monty committed
47

erikd's avatar
erikd committed
48
static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
49
50

  while(bytes--){
Monty's avatar
   
Monty committed
51
    oggpack_write(o,*s++,8);
Monty's avatar
   
Monty committed
52
53
  }
}
Monty's avatar
   
Monty committed
54

Monty's avatar
   
Monty committed
55
56
static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
  while(bytes--){
Monty's avatar
   
Monty committed
57
    *buf++=oggpack_read(o,8);
Monty's avatar
   
Monty committed
58
  }
Monty's avatar
   
Monty committed
59
60
}

Monty's avatar
   
Monty committed
61
void vorbis_comment_init(vorbis_comment *vc){
62
  memset(vc,0,sizeof(*vc));
Monty's avatar
   
Monty committed
63
64
}

65
void vorbis_comment_add(vorbis_comment *vc,const char *comment){
Monty's avatar
   
Monty committed
66
  vc->user_comments=_ogg_realloc(vc->user_comments,
67
                            (vc->comments+2)*sizeof(*vc->user_comments));
Monty's avatar
   
Monty committed
68
  vc->comment_lengths=_ogg_realloc(vc->comment_lengths,
69
                                  (vc->comments+2)*sizeof(*vc->comment_lengths));
Michael Smith's avatar
   
Michael Smith committed
70
  vc->comment_lengths[vc->comments]=strlen(comment);
71
72
  vc->user_comments[vc->comments]=_ogg_malloc(vc->comment_lengths[vc->comments]+1);
  strcpy(vc->user_comments[vc->comments], comment);
Monty's avatar
   
Monty committed
73
74
  vc->comments++;
  vc->user_comments[vc->comments]=NULL;
Monty's avatar
   
Monty committed
75
76
}

77
void vorbis_comment_add_tag(vorbis_comment *vc, const char *tag, const char *contents){
Michael Smith's avatar
   
Michael Smith committed
78
79
  char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */
  strcpy(comment, tag);
Michael Smith's avatar
   
Michael Smith committed
80
  strcat(comment, "=");
Michael Smith's avatar
   
Michael Smith committed
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
  strcat(comment, contents);
  vorbis_comment_add(vc, comment);
}

/* This is more or less the same as strncasecmp - but that doesn't exist
 * everywhere, and this is a fairly trivial function, so we include it */
static int tagcompare(const char *s1, const char *s2, int n){
  int c=0;
  while(c < n){
    if(toupper(s1[c]) != toupper(s2[c]))
      return !0;
    c++;
  }
  return 0;
}

97
char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count){
Michael Smith's avatar
   
Michael Smith committed
98
99
  long i;
  int found = 0;
Michael Smith's avatar
   
Michael Smith committed
100
101
  int taglen = strlen(tag)+1; /* +1 for the = we append */
  char *fulltag = alloca(taglen+ 1);
Michael Smith's avatar
   
Michael Smith committed
102
103
104

  strcpy(fulltag, tag);
  strcat(fulltag, "=");
Michael Smith's avatar
   
Michael Smith committed
105
106
  
  for(i=0;i<vc->comments;i++){
Michael Smith's avatar
   
Michael Smith committed
107
    if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
Michael Smith's avatar
   
Michael Smith committed
108
      if(count == found)
109
110
        /* We return a pointer to the data, not a copy */
              return vc->user_comments[i] + taglen;
Michael Smith's avatar
   
Michael Smith committed
111
      else
112
        found++;
Michael Smith's avatar
   
Michael Smith committed
113
114
115
116
117
    }
  }
  return NULL; /* didn't find anything */
}

118
int vorbis_comment_query_count(vorbis_comment *vc, const char *tag){
Michael Smith's avatar
   
Michael Smith committed
119
120
121
122
123
124
125
126
127
128
129
130
131
132
  int i,count=0;
  int taglen = strlen(tag)+1; /* +1 for the = we append */
  char *fulltag = alloca(taglen+1);
  strcpy(fulltag,tag);
  strcat(fulltag, "=");

  for(i=0;i<vc->comments;i++){
    if(!tagcompare(vc->user_comments[i], fulltag, taglen))
      count++;
  }

  return count;
}

Monty's avatar
   
Monty committed
133
134
135
void vorbis_comment_clear(vorbis_comment *vc){
  if(vc){
    long i;
136
137
    if(vc->user_comments){
      for(i=0;i<vc->comments;i++)
138
        if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
139
140
141
      _ogg_free(vc->user_comments);
    }
    if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
Monty's avatar
   
Monty committed
142
    if(vc->vendor)_ogg_free(vc->vendor);
143
    memset(vc,0,sizeof(*vc));
Monty's avatar
   
Monty committed
144
  }
Monty's avatar
   
Monty committed
145
146
}

147
/* blocksize 0 is guaranteed to be short, 1 is guaranteed to be long.
Monty's avatar
   
Monty committed
148
149
150
151
152
153
   They may be equal, but short will never ge greater than long */
int vorbis_info_blocksize(vorbis_info *vi,int zo){
  codec_setup_info *ci = vi->codec_setup;
  return ci ? ci->blocksizes[zo] : -1;
}

Monty's avatar
   
Monty committed
154
155
/* used by synthesis, which has a full, alloced vi */
void vorbis_info_init(vorbis_info *vi){
156
  memset(vi,0,sizeof(*vi));
Monty's avatar
   
Monty committed
157
  vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info));
Monty's avatar
   
Monty committed
158
159
}

Monty's avatar
   
Monty committed
160
void vorbis_info_clear(vorbis_info *vi){
Monty's avatar
   
Monty committed
161
  codec_setup_info     *ci=vi->codec_setup;
Monty's avatar
   
Monty committed
162
  int i;
Monty's avatar
   
Monty committed
163

Monty's avatar
   
Monty committed
164
165
166
  if(ci){

    for(i=0;i<ci->modes;i++)
Monty's avatar
   
Monty committed
167
      if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
Monty's avatar
   
Monty committed
168
169

    for(i=0;i<ci->maps;i++) /* unpack does the range checking */
170
      if(ci->map_param[i]) /* this may be cleaning up an aborted
171
172
173
                              unpack, in which case the below type
                              cannot be trusted */
        _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
Monty's avatar
   
Monty committed
174
175

    for(i=0;i<ci->floors;i++) /* unpack does the range checking */
176
      if(ci->floor_param[i]) /* this may be cleaning up an aborted
177
178
179
                                unpack, in which case the below type
                                cannot be trusted */
        _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
Monty's avatar
   
Monty committed
180
    
Monty's avatar
   
Monty committed
181
    for(i=0;i<ci->residues;i++) /* unpack does the range checking */
182
      if(ci->residue_param[i]) /* this may be cleaning up an aborted
183
184
185
                                  unpack, in which case the below type
                                  cannot be trusted */
        _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
186
    
Monty's avatar
   
Monty committed
187
188
    for(i=0;i<ci->books;i++){
      if(ci->book_param[i]){
189
190
        /* knows if the book was not alloced */
        vorbis_staticbook_destroy(ci->book_param[i]);
Monty's avatar
   
Monty committed
191
      }
Monty's avatar
   
Monty committed
192
      if(ci->fullbooks)
193
        vorbis_book_clear(ci->fullbooks+i);
Monty's avatar
   
Monty committed
194
    }
Monty's avatar
   
Monty committed
195
    if(ci->fullbooks)
196
        _ogg_free(ci->fullbooks);
Monty's avatar
   
Monty committed
197
198
199
200
    
    for(i=0;i<ci->psys;i++)
      _vi_psy_free(ci->psy_param[i]);

Monty's avatar
   
Monty committed
201
    _ogg_free(ci);
Monty's avatar
   
Monty committed
202
203
  }

204
  memset(vi,0,sizeof(*vi));
Monty's avatar
   
Monty committed
205
206
207
208
209
}

/* Header packing/unpacking ********************************************/

static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
Monty's avatar
   
Monty committed
210
211
212
  codec_setup_info     *ci=vi->codec_setup;
  if(!ci)return(OV_EFAULT);

Monty's avatar
   
Monty committed
213
  vi->version=oggpack_read(opb,32);
Monty's avatar
   
Monty committed
214
  if(vi->version!=0)return(OV_EVERSION);
Monty's avatar
   
Monty committed
215

Monty's avatar
   
Monty committed
216
217
  vi->channels=oggpack_read(opb,8);
  vi->rate=oggpack_read(opb,32);
Monty's avatar
   
Monty committed
218

Monty's avatar
   
Monty committed
219
220
221
  vi->bitrate_upper=oggpack_read(opb,32);
  vi->bitrate_nominal=oggpack_read(opb,32);
  vi->bitrate_lower=oggpack_read(opb,32);
Monty's avatar
   
Monty committed
222

Monty's avatar
   
Monty committed
223
224
  ci->blocksizes[0]=1<<oggpack_read(opb,4);
  ci->blocksizes[1]=1<<oggpack_read(opb,4);
Monty's avatar
   
Monty committed
225
226
227
  
  if(vi->rate<1)goto err_out;
  if(vi->channels<1)goto err_out;
228
  if(ci->blocksizes[0]<64)goto err_out; 
Monty's avatar
   
Monty committed
229
  if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
230
231
  if(ci->blocksizes[1]>8192)goto err_out;

Monty's avatar
   
Monty committed
232
  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
Monty's avatar
   
Monty committed
233
234
235
236

  return(0);
 err_out:
  vorbis_info_clear(vi);
Monty's avatar
   
Monty committed
237
  return(OV_EBADHEADER);
Monty's avatar
   
Monty committed
238
239
}

Monty's avatar
   
Monty committed
240
static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
Monty's avatar
   
Monty committed
241
  int i;
Monty's avatar
   
Monty committed
242
  int vendorlen=oggpack_read(opb,32);
Monty's avatar
   
Monty committed
243
  if(vendorlen<0)goto err_out;
244
  if(vendorlen+8>opb->storage)goto err_out;
Monty's avatar
   
Monty committed
245
  vc->vendor=_ogg_calloc(vendorlen+1,1);
Monty's avatar
   
Monty committed
246
  _v_readstring(opb,vc->vendor,vendorlen);
247
248
249
250
  i=oggpack_read(opb,32);
  if(i<0)goto err_out;
  if(4*i+oggpack_bytes(opb)>opb->storage)goto err_out;
  vc->comments=i;
251
252
  vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
  vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
253
            
Monty's avatar
   
Monty committed
254
  for(i=0;i<vc->comments;i++){
Monty's avatar
   
Monty committed
255
    int len=oggpack_read(opb,32);
Monty's avatar
   
Monty committed
256
    if(len<0)goto err_out;
257
258
    if(len+oggpack_bytes(opb)>opb->storage)goto err_out;
    vc->comment_lengths[i]=len;
Monty's avatar
   
Monty committed
259
    vc->user_comments[i]=_ogg_calloc(len+1,1);
Monty's avatar
   
Monty committed
260
    _v_readstring(opb,vc->user_comments[i],len);
261
  }          
Monty's avatar
   
Monty committed
262
  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
Monty's avatar
   
Monty committed
263

Monty's avatar
   
Monty committed
264
265
  return(0);
 err_out:
Monty's avatar
   
Monty committed
266
  vorbis_comment_clear(vc);
Monty's avatar
   
Monty committed
267
  return(OV_EBADHEADER);
Monty's avatar
   
Monty committed
268
269
270
271
272
}

/* all of the real encoding details are here.  The modes, books,
   everything */
static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
Monty's avatar
   
Monty committed
273
  codec_setup_info     *ci=vi->codec_setup;
Monty's avatar
   
Monty committed
274
  int i;
Monty's avatar
   
Monty committed
275
  if(!ci)return(OV_EFAULT);
Monty's avatar
   
Monty committed
276

Monty's avatar
   
Monty committed
277
  /* codebooks */
Monty's avatar
   
Monty committed
278
  ci->books=oggpack_read(opb,8)+1;
279
  /*ci->book_param=_ogg_calloc(ci->books,sizeof(*ci->book_param));*/
Monty's avatar
   
Monty committed
280
  for(i=0;i<ci->books;i++){
281
    ci->book_param[i]=_ogg_calloc(1,sizeof(*ci->book_param[i]));
Monty's avatar
   
Monty committed
282
    if(vorbis_staticbook_unpack(opb,ci->book_param[i]))goto err_out;
Monty's avatar
   
Monty committed
283
284
  }

Monty's avatar
   
Monty committed
285
286
287
288
289
290
291
  /* time backend settings; hooks are unused */
  {
    int times=oggpack_read(opb,6)+1;
    for(i=0;i<times;i++){
      int test=oggpack_read(opb,16);
      if(test<0 || test>=VI_TIMEB)goto err_out;
    }
Monty's avatar
   
Monty committed
292
  }
Monty's avatar
   
Monty committed
293

Monty's avatar
   
Monty committed
294
  /* floor backend settings */
Monty's avatar
   
Monty committed
295
  ci->floors=oggpack_read(opb,6)+1;
296
  /*ci->floor_type=_ogg_malloc(ci->floors*sizeof(*ci->floor_type));*/
Monty's avatar
   
Monty committed
297
298
299
300
301
302
  /*ci->floor_param=_ogg_calloc(ci->floors,sizeof(void *));*/
  for(i=0;i<ci->floors;i++){
    ci->floor_type[i]=oggpack_read(opb,16);
    if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
    ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
    if(!ci->floor_param[i])goto err_out;
Monty's avatar
   
Monty committed
303
304
  }

Monty's avatar
   
Monty committed
305
  /* residue backend settings */
Monty's avatar
   
Monty committed
306
  ci->residues=oggpack_read(opb,6)+1;
307
  /*ci->residue_type=_ogg_malloc(ci->residues*sizeof(*ci->residue_type));*/
Monty's avatar
   
Monty committed
308
309
310
311
312
313
  /*ci->residue_param=_ogg_calloc(ci->residues,sizeof(void *));*/
  for(i=0;i<ci->residues;i++){
    ci->residue_type[i]=oggpack_read(opb,16);
    if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
    ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
    if(!ci->residue_param[i])goto err_out;
Monty's avatar
   
Monty committed
314
315
  }

Monty's avatar
   
Monty committed
316
  /* map backend settings */
Monty's avatar
   
Monty committed
317
  ci->maps=oggpack_read(opb,6)+1;
318
  /*ci->map_type=_ogg_malloc(ci->maps*sizeof(*ci->map_type));*/
Monty's avatar
   
Monty committed
319
320
321
322
323
324
  /*ci->map_param=_ogg_calloc(ci->maps,sizeof(void *));*/
  for(i=0;i<ci->maps;i++){
    ci->map_type[i]=oggpack_read(opb,16);
    if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
    ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
    if(!ci->map_param[i])goto err_out;
Monty's avatar
   
Monty committed
325
  }
Monty's avatar
   
Monty committed
326
327
  
  /* mode settings */
Monty's avatar
   
Monty committed
328
329
330
  ci->modes=oggpack_read(opb,6)+1;
  /*vi->mode_param=_ogg_calloc(vi->modes,sizeof(void *));*/
  for(i=0;i<ci->modes;i++){
331
    ci->mode_param[i]=_ogg_calloc(1,sizeof(*ci->mode_param[i]));
Monty's avatar
   
Monty committed
332
333
334
335
336
337
338
339
    ci->mode_param[i]->blockflag=oggpack_read(opb,1);
    ci->mode_param[i]->windowtype=oggpack_read(opb,16);
    ci->mode_param[i]->transformtype=oggpack_read(opb,16);
    ci->mode_param[i]->mapping=oggpack_read(opb,8);

    if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
    if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
    if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
Monty's avatar
   
Monty committed
340
  }
Monty's avatar
   
Monty committed
341
  
Monty's avatar
   
Monty committed
342
  if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
Monty's avatar
   
Monty committed
343

Monty's avatar
   
Monty committed
344
  return(0);
Monty's avatar
   
Monty committed
345
 err_out:
Monty's avatar
   
Monty committed
346
  vorbis_info_clear(vi);
Monty's avatar
   
Monty committed
347
  return(OV_EBADHEADER);
Monty's avatar
   
Monty committed
348
349
}

350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
/* Is this packet a vorbis ID header? */
int vorbis_synthesis_idheader(ogg_packet *op){
  oggpack_buffer opb;
  char buffer[6];

  if(op){
    oggpack_readinit(&opb,op->packet,op->bytes);

    if(!op->b_o_s)
      return(0); /* Not the initial packet */

    if(oggpack_read(&opb,8) != 1)
      return 0; /* not an ID header */

    memset(buffer,0,6);
    _v_readstring(&opb,buffer,6);
    if(memcmp(buffer,"vorbis",6))
      return 0; /* not vorbis */

    return 1;
  }

  return 0;
}

Monty's avatar
   
Monty committed
375
/* The Vorbis header is in three packets; the initial small packet in
Monty's avatar
   
Monty committed
376
377
378
   the first page that identifies basic parameters, a second packet
   with bitstream comments and a third packet that holds the
   codebook. */
Monty's avatar
   
Monty committed
379

Monty's avatar
   
Monty committed
380
int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
Monty's avatar
   
Monty committed
381
382
383
  oggpack_buffer opb;
  
  if(op){
Monty's avatar
   
Monty committed
384
    oggpack_readinit(&opb,op->packet,op->bytes);
Monty's avatar
   
Monty committed
385
386
387
388
389

    /* Which of the three types of header is this? */
    /* Also verify header-ness, vorbis */
    {
      char buffer[6];
Monty's avatar
   
Monty committed
390
      int packtype=oggpack_read(&opb,8);
Monty's avatar
   
Monty committed
391
392
393
      memset(buffer,0,6);
      _v_readstring(&opb,buffer,6);
      if(memcmp(buffer,"vorbis",6)){
394
395
        /* not a vorbis header */
        return(OV_ENOTVORBIS);
Monty's avatar
   
Monty committed
396
      }
Monty's avatar
   
Monty committed
397
398
      switch(packtype){
      case 0x01: /* least significant *bit* is read first */
399
400
401
402
403
404
405
406
        if(!op->b_o_s){
          /* Not the initial packet */
          return(OV_EBADHEADER);
        }
        if(vi->rate!=0){
          /* previously initialized info header */
          return(OV_EBADHEADER);
        }
Monty's avatar
   
Monty committed
407

408
        return(_vorbis_unpack_info(vi,&opb));
Monty's avatar
   
Monty committed
409

Monty's avatar
   
Monty committed
410
      case 0x03: /* least significant *bit* is read first */
411
412
413
414
        if(vi->rate==0){
          /* um... we didn't get the initial header */
          return(OV_EBADHEADER);
        }
Monty's avatar
   
Monty committed
415

416
        return(_vorbis_unpack_comment(vc,&opb));
Monty's avatar
   
Monty committed
417

Monty's avatar
   
Monty committed
418
      case 0x05: /* least significant *bit* is read first */
419
420
421
422
        if(vi->rate==0 || vc->vendor==NULL){
          /* um... we didn;t get the initial header or comments yet */
          return(OV_EBADHEADER);
        }
Monty's avatar
   
Monty committed
423

424
        return(_vorbis_unpack_books(vi,&opb));
Monty's avatar
   
Monty committed
425
426

      default:
427
428
429
        /* Not a valid vorbis header type */
        return(OV_EBADHEADER);
        break;
Monty's avatar
   
Monty committed
430
431
432
      }
    }
  }
Monty's avatar
   
Monty committed
433
  return(OV_EBADHEADER);
Monty's avatar
   
Monty committed
434
435
}

Monty's avatar
   
Monty committed
436
437
438
/* pack side **********************************************************/

static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){
Monty's avatar
   
Monty committed
439
440
441
  codec_setup_info     *ci=vi->codec_setup;
  if(!ci)return(OV_EFAULT);

Monty's avatar
   
Monty committed
442
  /* preamble */  
Monty's avatar
   
Monty committed
443
  oggpack_write(opb,0x01,8);
444
  _v_writestring(opb,"vorbis", 6);
Monty's avatar
   
Monty committed
445
446

  /* basic information about the stream */
Monty's avatar
   
Monty committed
447
448
449
  oggpack_write(opb,0x00,32);
  oggpack_write(opb,vi->channels,8);
  oggpack_write(opb,vi->rate,32);
Monty's avatar
   
Monty committed
450

Monty's avatar
   
Monty committed
451
452
453
  oggpack_write(opb,vi->bitrate_upper,32);
  oggpack_write(opb,vi->bitrate_nominal,32);
  oggpack_write(opb,vi->bitrate_lower,32);
Monty's avatar
   
Monty committed
454

Monty's avatar
   
Monty committed
455
456
  oggpack_write(opb,ilog2(ci->blocksizes[0]),4);
  oggpack_write(opb,ilog2(ci->blocksizes[1]),4);
Monty's avatar
   
Monty committed
457
  oggpack_write(opb,1,1);
Monty's avatar
   
Monty committed
458

Monty's avatar
   
Monty committed
459
460
461
  return(0);
}

Monty's avatar
   
Monty committed
462
static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){
463
  int bytes = strlen(ENCODE_VENDOR_STRING);
Monty's avatar
   
Monty committed
464
465

  /* preamble */  
Monty's avatar
   
Monty committed
466
  oggpack_write(opb,0x03,8);
467
  _v_writestring(opb,"vorbis", 6);
Monty's avatar
   
Monty committed
468
469

  /* vendor */
470
  oggpack_write(opb,bytes,32);
471
472
  _v_writestring(opb,ENCODE_VENDOR_STRING, bytes);

Monty's avatar
   
Monty committed
473
474
  /* comments */

Monty's avatar
   
Monty committed
475
  oggpack_write(opb,vc->comments,32);
Monty's avatar
   
Monty committed
476
  if(vc->comments){
Monty's avatar
   
Monty committed
477
    int i;
Monty's avatar
   
Monty committed
478
479
    for(i=0;i<vc->comments;i++){
      if(vc->user_comments[i]){
480
481
        oggpack_write(opb,vc->comment_lengths[i],32);
        _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
Monty's avatar
   
Monty committed
482
      }else{
483
        oggpack_write(opb,0,32);
Monty's avatar
   
Monty committed
484
485
486
      }
    }
  }
Monty's avatar
   
Monty committed
487
  oggpack_write(opb,1,1);
Monty's avatar
   
Monty committed
488
489
490
491
492

  return(0);
}
 
static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){
Monty's avatar
   
Monty committed
493
  codec_setup_info     *ci=vi->codec_setup;
Monty's avatar
   
Monty committed
494
  int i;
Monty's avatar
   
Monty committed
495
496
  if(!ci)return(OV_EFAULT);

Monty's avatar
   
Monty committed
497
  oggpack_write(opb,0x05,8);
498
  _v_writestring(opb,"vorbis", 6);
Monty's avatar
   
Monty committed
499

Monty's avatar
   
Monty committed
500
  /* books */
Monty's avatar
   
Monty committed
501
502
503
  oggpack_write(opb,ci->books-1,8);
  for(i=0;i<ci->books;i++)
    if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out;
Monty's avatar
   
Monty committed
504

Monty's avatar
   
Monty committed
505
506
507
  /* times; hook placeholders */
  oggpack_write(opb,0,6);
  oggpack_write(opb,0,16);
Monty's avatar
   
Monty committed
508
509

  /* floors */
Monty's avatar
   
Monty committed
510
511
512
  oggpack_write(opb,ci->floors-1,6);
  for(i=0;i<ci->floors;i++){
    oggpack_write(opb,ci->floor_type[i],16);
Monty's avatar
   
Monty committed
513
514
515
516
    if(_floor_P[ci->floor_type[i]]->pack)
      _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb);
    else
      goto err_out;
Monty's avatar
   
Monty committed
517
518
  }

Monty's avatar
   
Monty committed
519
  /* residues */
Monty's avatar
   
Monty committed
520
521
522
523
  oggpack_write(opb,ci->residues-1,6);
  for(i=0;i<ci->residues;i++){
    oggpack_write(opb,ci->residue_type[i],16);
    _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb);
Monty's avatar
   
Monty committed
524
525
  }

Monty's avatar
   
Monty committed
526
  /* maps */
Monty's avatar
   
Monty committed
527
528
529
530
  oggpack_write(opb,ci->maps-1,6);
  for(i=0;i<ci->maps;i++){
    oggpack_write(opb,ci->map_type[i],16);
    _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb);
Monty's avatar
   
Monty committed
531
  }
Monty's avatar
   
Monty committed
532

Monty's avatar
   
Monty committed
533
  /* modes */
Monty's avatar
   
Monty committed
534
535
536
537
538
539
  oggpack_write(opb,ci->modes-1,6);
  for(i=0;i<ci->modes;i++){
    oggpack_write(opb,ci->mode_param[i]->blockflag,1);
    oggpack_write(opb,ci->mode_param[i]->windowtype,16);
    oggpack_write(opb,ci->mode_param[i]->transformtype,16);
    oggpack_write(opb,ci->mode_param[i]->mapping,8);
Monty's avatar
   
Monty committed
540
  }
Monty's avatar
   
Monty committed
541
  oggpack_write(opb,1,1);
Monty's avatar
   
Monty committed
542

Monty's avatar
   
Monty committed
543
544
545
546
547
  return(0);
err_out:
  return(-1);
} 

Michael Smith's avatar
   
Michael Smith committed
548
int vorbis_commentheader_out(vorbis_comment *vc,
549
                                          ogg_packet *op){
Michael Smith's avatar
   
Michael Smith committed
550
551
552
553
554
555
556
557
558
559
560
561
562

  oggpack_buffer opb;

  oggpack_writeinit(&opb);
  if(_vorbis_pack_comment(&opb,vc)) return OV_EIMPL;

  op->packet = _ogg_malloc(oggpack_bytes(&opb));
  memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));

  op->bytes=oggpack_bytes(&opb);
  op->b_o_s=0;
  op->e_o_s=0;
  op->granulepos=0;
563
  op->packetno=1;
Michael Smith's avatar
   
Michael Smith committed
564
565
566
567

  return 0;
}

Monty's avatar
   
Monty committed
568
int vorbis_analysis_headerout(vorbis_dsp_state *v,
569
570
571
572
                              vorbis_comment *vc,
                              ogg_packet *op,
                              ogg_packet *op_comm,
                              ogg_packet *op_code){
Monty's avatar
   
Monty committed
573
  int ret=OV_EIMPL;
Monty's avatar
   
Monty committed
574
  vorbis_info *vi=v->vi;
Monty's avatar
   
Monty committed
575
  oggpack_buffer opb;
Monty's avatar
   
Monty committed
576
  private_state *b=v->backend_state;
Monty's avatar
   
Monty committed
577
578
579
580
581

  if(!b){
    ret=OV_EFAULT;
    goto err_out;
  }
Monty's avatar
   
Monty committed
582

Monty's avatar
   
Monty committed
583
  /* first header packet **********************************************/
Monty's avatar
   
Monty committed
584

Monty's avatar
   
Monty committed
585
  oggpack_writeinit(&opb);
Monty's avatar
   
Monty committed
586
  if(_vorbis_pack_info(&opb,vi))goto err_out;
Monty's avatar
   
Monty committed
587
588

  /* build the packet */
Monty's avatar
   
Monty committed
589
  if(b->header)_ogg_free(b->header);
Monty's avatar
   
Monty committed
590
591
592
  b->header=_ogg_malloc(oggpack_bytes(&opb));
  memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
  op->packet=b->header;
Monty's avatar
   
Monty committed
593
  op->bytes=oggpack_bytes(&opb);
Monty's avatar
   
Monty committed
594
595
  op->b_o_s=1;
  op->e_o_s=0;
Monty's avatar
   
Monty committed
596
  op->granulepos=0;
597
  op->packetno=0;
Monty's avatar
   
Monty committed
598

Monty's avatar
   
Monty committed
599
  /* second header packet (comments) **********************************/
Monty's avatar
   
Monty committed
600

Monty's avatar
   
Monty committed
601
  oggpack_reset(&opb);
Monty's avatar
   
Monty committed
602
  if(_vorbis_pack_comment(&opb,vc))goto err_out;
Monty's avatar
   
Monty committed
603

Monty's avatar
   
Monty committed
604
  if(b->header1)_ogg_free(b->header1);
Monty's avatar
   
Monty committed
605
606
607
  b->header1=_ogg_malloc(oggpack_bytes(&opb));
  memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
  op_comm->packet=b->header1;
Monty's avatar
   
Monty committed
608
  op_comm->bytes=oggpack_bytes(&opb);
Monty's avatar
   
Monty committed
609
610
  op_comm->b_o_s=0;
  op_comm->e_o_s=0;
Monty's avatar
   
Monty committed
611
  op_comm->granulepos=0;
612
  op_comm->packetno=1;
Monty's avatar
   
Monty committed
613

Monty's avatar
   
Monty committed
614
  /* third header packet (modes/codebooks) ****************************/
Monty's avatar
   
Monty committed
615

Monty's avatar
   
Monty committed
616
  oggpack_reset(&opb);
Monty's avatar
   
Monty committed
617
  if(_vorbis_pack_books(&opb,vi))goto err_out;
Monty's avatar
   
Monty committed
618

Monty's avatar
   
Monty committed
619
  if(b->header2)_ogg_free(b->header2);
Monty's avatar
   
Monty committed
620
621
622
  b->header2=_ogg_malloc(oggpack_bytes(&opb));
  memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
  op_code->packet=b->header2;
Monty's avatar
   
Monty committed
623
  op_code->bytes=oggpack_bytes(&opb);
Monty's avatar
   
Monty committed
624
625
  op_code->b_o_s=0;
  op_code->e_o_s=0;
Monty's avatar
   
Monty committed
626
  op_code->granulepos=0;
627
  op_code->packetno=2;
Monty's avatar
   
Monty committed
628

Monty's avatar
   
Monty committed
629
  oggpack_writeclear(&opb);
Monty's avatar
   
Monty committed
630
  return(0);
Monty's avatar
   
Monty committed
631
 err_out:
Monty's avatar
   
Monty committed
632
  oggpack_writeclear(&opb);
633
634
635
  memset(op,0,sizeof(*op));
  memset(op_comm,0,sizeof(*op_comm));
  memset(op_code,0,sizeof(*op_code));
Monty's avatar
   
Monty committed
636

637
638
639
640
641
642
643
644
  if(b){
    if(b->header)_ogg_free(b->header);
    if(b->header1)_ogg_free(b->header1);
    if(b->header2)_ogg_free(b->header2);
    b->header=NULL;
    b->header1=NULL;
    b->header2=NULL;
  }
Monty's avatar
   
Monty committed
645
  return(ret);
Monty's avatar
   
Monty committed
646
647
}

Monty's avatar
   
Monty committed
648
649
650
651
652
double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){
  if(granulepos>=0)
    return((double)granulepos/v->vi->rate);
  return(-1);
}
653
654
655
656

const char *vorbis_version_string(void){
  return GENERAL_VENDOR_STRING;
}