1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: maintain the info structure, info <-> header packets
14
15 ********************************************************************/
16
17 /* general handling of the header and the vorbis_info structure (and
18 substructures) */
19
20 #include <stdlib.h>
21 #include <string.h>
22 #include <ctype.h>
23 #include <ogg/ogg.h>
24 #include "vorbis/codec.h"
25 #include "codec_internal.h"
26 #include "codebook.h"
27 #include "registry.h"
28 #include "window.h"
29 #include "psy.h"
30 #include "misc.h"
31 #include "os.h"
32
33 #define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.6"
34 #define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20180316 (Now 100% fewer shells)"
35
36 /* helpers */
_v_writestring(oggpack_buffer * o,const char * s,int bytes)37 static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
38
39 while(bytes--){
40 oggpack_write(o,*s++,8);
41 }
42 }
43
_v_readstring(oggpack_buffer * o,char * buf,int bytes)44 static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
45 while(bytes--){
46 *buf++=oggpack_read(o,8);
47 }
48 }
49
vorbis_comment_init(vorbis_comment * vc)50 void vorbis_comment_init(vorbis_comment *vc){
51 memset(vc,0,sizeof(*vc));
52 }
53
vorbis_comment_add(vorbis_comment * vc,const char * comment)54 void vorbis_comment_add(vorbis_comment *vc,const char *comment){
55 vc->user_comments=_ogg_realloc(vc->user_comments,
56 (vc->comments+2)*sizeof(*vc->user_comments));
57 vc->comment_lengths=_ogg_realloc(vc->comment_lengths,
58 (vc->comments+2)*sizeof(*vc->comment_lengths));
59 vc->comment_lengths[vc->comments]=strlen(comment);
60 vc->user_comments[vc->comments]=_ogg_malloc(vc->comment_lengths[vc->comments]+1);
61 strcpy(vc->user_comments[vc->comments], comment);
62 vc->comments++;
63 vc->user_comments[vc->comments]=NULL;
64 }
65
vorbis_comment_add_tag(vorbis_comment * vc,const char * tag,const char * contents)66 void vorbis_comment_add_tag(vorbis_comment *vc, const char *tag, const char *contents){
67 /* Length for key and value +2 for = and \0 */
68 char *comment=_ogg_malloc(strlen(tag)+strlen(contents)+2);
69 strcpy(comment, tag);
70 strcat(comment, "=");
71 strcat(comment, contents);
72 vorbis_comment_add(vc, comment);
73 _ogg_free(comment);
74 }
75
76 /* This is more or less the same as strncasecmp - but that doesn't exist
77 * everywhere, and this is a fairly trivial function, so we include it */
tagcompare(const char * s1,const char * s2,int n)78 static int tagcompare(const char *s1, const char *s2, int n){
79 int c=0;
80 while(c < n){
81 if(toupper(s1[c]) != toupper(s2[c]))
82 return !0;
83 c++;
84 }
85 return 0;
86 }
87
vorbis_comment_query(vorbis_comment * vc,const char * tag,int count)88 char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count){
89 long i;
90 int found = 0;
91 int taglen = strlen(tag)+1; /* +1 for the = we append */
92 char *fulltag = _ogg_malloc(taglen+1);
93
94 strcpy(fulltag, tag);
95 strcat(fulltag, "=");
96
97 for(i=0;i<vc->comments;i++){
98 if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
99 if(count == found) {
100 /* We return a pointer to the data, not a copy */
101 _ogg_free(fulltag);
102 return vc->user_comments[i] + taglen;
103 } else {
104 found++;
105 }
106 }
107 }
108 _ogg_free(fulltag);
109 return NULL; /* didn't find anything */
110 }
111
vorbis_comment_query_count(vorbis_comment * vc,const char * tag)112 int vorbis_comment_query_count(vorbis_comment *vc, const char *tag){
113 int i,count=0;
114 int taglen = strlen(tag)+1; /* +1 for the = we append */
115 char *fulltag = _ogg_malloc(taglen+1);
116 strcpy(fulltag,tag);
117 strcat(fulltag, "=");
118
119 for(i=0;i<vc->comments;i++){
120 if(!tagcompare(vc->user_comments[i], fulltag, taglen))
121 count++;
122 }
123
124 _ogg_free(fulltag);
125 return count;
126 }
127
vorbis_comment_clear(vorbis_comment * vc)128 void vorbis_comment_clear(vorbis_comment *vc){
129 if(vc){
130 long i;
131 if(vc->user_comments){
132 for(i=0;i<vc->comments;i++)
133 if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
134 _ogg_free(vc->user_comments);
135 }
136 if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
137 if(vc->vendor)_ogg_free(vc->vendor);
138 memset(vc,0,sizeof(*vc));
139 }
140 }
141
142 /* blocksize 0 is guaranteed to be short, 1 is guaranteed to be long.
143 They may be equal, but short will never ge greater than long */
vorbis_info_blocksize(vorbis_info * vi,int zo)144 int vorbis_info_blocksize(vorbis_info *vi,int zo){
145 codec_setup_info *ci = vi->codec_setup;
146 return ci ? ci->blocksizes[zo] : -1;
147 }
148
149 /* used by synthesis, which has a full, alloced vi */
vorbis_info_init(vorbis_info * vi)150 void vorbis_info_init(vorbis_info *vi){
151 memset(vi,0,sizeof(*vi));
152 vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info));
153 }
154
vorbis_info_clear(vorbis_info * vi)155 void vorbis_info_clear(vorbis_info *vi){
156 codec_setup_info *ci=vi->codec_setup;
157 int i;
158
159 if(ci){
160
161 for(i=0;i<ci->modes;i++)
162 if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
163
164 for(i=0;i<ci->maps;i++) /* unpack does the range checking */
165 if(ci->map_param[i]) /* this may be cleaning up an aborted
166 unpack, in which case the below type
167 cannot be trusted */
168 _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
169
170 for(i=0;i<ci->floors;i++) /* unpack does the range checking */
171 if(ci->floor_param[i]) /* this may be cleaning up an aborted
172 unpack, in which case the below type
173 cannot be trusted */
174 _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
175
176 for(i=0;i<ci->residues;i++) /* unpack does the range checking */
177 if(ci->residue_param[i]) /* this may be cleaning up an aborted
178 unpack, in which case the below type
179 cannot be trusted */
180 _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
181
182 for(i=0;i<ci->books;i++){
183 if(ci->book_param[i]){
184 /* knows if the book was not alloced */
185 vorbis_staticbook_destroy(ci->book_param[i]);
186 }
187 if(ci->fullbooks)
188 vorbis_book_clear(ci->fullbooks+i);
189 }
190 if(ci->fullbooks)
191 _ogg_free(ci->fullbooks);
192
193 for(i=0;i<ci->psys;i++)
194 _vi_psy_free(ci->psy_param[i]);
195
196 _ogg_free(ci);
197 }
198
199 memset(vi,0,sizeof(*vi));
200 }
201
202 /* Header packing/unpacking ********************************************/
203
_vorbis_unpack_info(vorbis_info * vi,oggpack_buffer * opb)204 static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
205 codec_setup_info *ci=vi->codec_setup;
206 if(!ci)return(OV_EFAULT);
207
208 vi->version=oggpack_read(opb,32);
209 if(vi->version!=0)return(OV_EVERSION);
210
211 vi->channels=oggpack_read(opb,8);
212 vi->rate=oggpack_read(opb,32);
213
214 vi->bitrate_upper=(ogg_int32_t)oggpack_read(opb,32);
215 vi->bitrate_nominal=(ogg_int32_t)oggpack_read(opb,32);
216 vi->bitrate_lower=(ogg_int32_t)oggpack_read(opb,32);
217
218 ci->blocksizes[0]=1<<oggpack_read(opb,4);
219 ci->blocksizes[1]=1<<oggpack_read(opb,4);
220
221 if(vi->rate<1)goto err_out;
222 if(vi->channels<1)goto err_out;
223 if(ci->blocksizes[0]<64)goto err_out;
224 if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
225 if(ci->blocksizes[1]>8192)goto err_out;
226
227 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
228
229 return(0);
230 err_out:
231 vorbis_info_clear(vi);
232 return(OV_EBADHEADER);
233 }
234
_vorbis_unpack_comment(vorbis_comment * vc,oggpack_buffer * opb)235 static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
236 int i;
237 int vendorlen=oggpack_read(opb,32);
238 if(vendorlen<0)goto err_out;
239 if(vendorlen>opb->storage-8)goto err_out;
240 vc->vendor=_ogg_calloc(vendorlen+1,1);
241 _v_readstring(opb,vc->vendor,vendorlen);
242 i=oggpack_read(opb,32);
243 if(i<0)goto err_out;
244 if(i>((opb->storage-oggpack_bytes(opb))>>2))goto err_out;
245 vc->comments=i;
246 vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
247 vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
248
249 for(i=0;i<vc->comments;i++){
250 int len=oggpack_read(opb,32);
251 if(len<0)goto err_out;
252 if(len>opb->storage-oggpack_bytes(opb))goto err_out;
253 vc->comment_lengths[i]=len;
254 vc->user_comments[i]=_ogg_calloc(len+1,1);
255 _v_readstring(opb,vc->user_comments[i],len);
256 }
257 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
258
259 return(0);
260 err_out:
261 vorbis_comment_clear(vc);
262 return(OV_EBADHEADER);
263 }
264
265 /* all of the real encoding details are here. The modes, books,
266 everything */
_vorbis_unpack_books(vorbis_info * vi,oggpack_buffer * opb)267 static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
268 codec_setup_info *ci=vi->codec_setup;
269 int i;
270
271 /* codebooks */
272 ci->books=oggpack_read(opb,8)+1;
273 if(ci->books<=0)goto err_out;
274 for(i=0;i<ci->books;i++){
275 ci->book_param[i]=vorbis_staticbook_unpack(opb);
276 if(!ci->book_param[i])goto err_out;
277 }
278
279 /* time backend settings; hooks are unused */
280 {
281 int times=oggpack_read(opb,6)+1;
282 if(times<=0)goto err_out;
283 for(i=0;i<times;i++){
284 int test=oggpack_read(opb,16);
285 if(test<0 || test>=VI_TIMEB)goto err_out;
286 }
287 }
288
289 /* floor backend settings */
290 ci->floors=oggpack_read(opb,6)+1;
291 if(ci->floors<=0)goto err_out;
292 for(i=0;i<ci->floors;i++){
293 ci->floor_type[i]=oggpack_read(opb,16);
294 if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
295 ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
296 if(!ci->floor_param[i])goto err_out;
297 }
298
299 /* residue backend settings */
300 ci->residues=oggpack_read(opb,6)+1;
301 if(ci->residues<=0)goto err_out;
302 for(i=0;i<ci->residues;i++){
303 ci->residue_type[i]=oggpack_read(opb,16);
304 if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
305 ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
306 if(!ci->residue_param[i])goto err_out;
307 }
308
309 /* map backend settings */
310 ci->maps=oggpack_read(opb,6)+1;
311 if(ci->maps<=0)goto err_out;
312 for(i=0;i<ci->maps;i++){
313 ci->map_type[i]=oggpack_read(opb,16);
314 if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
315 ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
316 if(!ci->map_param[i])goto err_out;
317 }
318
319 /* mode settings */
320 ci->modes=oggpack_read(opb,6)+1;
321 if(ci->modes<=0)goto err_out;
322 for(i=0;i<ci->modes;i++){
323 ci->mode_param[i]=_ogg_calloc(1,sizeof(*ci->mode_param[i]));
324 ci->mode_param[i]->blockflag=oggpack_read(opb,1);
325 ci->mode_param[i]->windowtype=oggpack_read(opb,16);
326 ci->mode_param[i]->transformtype=oggpack_read(opb,16);
327 ci->mode_param[i]->mapping=oggpack_read(opb,8);
328
329 if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
330 if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
331 if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
332 if(ci->mode_param[i]->mapping<0)goto err_out;
333 }
334
335 if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
336
337 return(0);
338 err_out:
339 vorbis_info_clear(vi);
340 return(OV_EBADHEADER);
341 }
342
343 /* Is this packet a vorbis ID header? */
vorbis_synthesis_idheader(ogg_packet * op)344 int vorbis_synthesis_idheader(ogg_packet *op){
345 oggpack_buffer opb;
346 char buffer[6];
347
348 if(op){
349 oggpack_readinit(&opb,op->packet,op->bytes);
350
351 if(!op->b_o_s)
352 return(0); /* Not the initial packet */
353
354 if(oggpack_read(&opb,8) != 1)
355 return 0; /* not an ID header */
356
357 memset(buffer,0,6);
358 _v_readstring(&opb,buffer,6);
359 if(memcmp(buffer,"vorbis",6))
360 return 0; /* not vorbis */
361
362 return 1;
363 }
364
365 return 0;
366 }
367
368 /* The Vorbis header is in three packets; the initial small packet in
369 the first page that identifies basic parameters, a second packet
370 with bitstream comments and a third packet that holds the
371 codebook. */
372
vorbis_synthesis_headerin(vorbis_info * vi,vorbis_comment * vc,ogg_packet * op)373 int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
374 oggpack_buffer opb;
375
376 if(op){
377 oggpack_readinit(&opb,op->packet,op->bytes);
378
379 /* Which of the three types of header is this? */
380 /* Also verify header-ness, vorbis */
381 {
382 char buffer[6];
383 int packtype=oggpack_read(&opb,8);
384 memset(buffer,0,6);
385 _v_readstring(&opb,buffer,6);
386 if(memcmp(buffer,"vorbis",6)){
387 /* not a vorbis header */
388 return(OV_ENOTVORBIS);
389 }
390 switch(packtype){
391 case 0x01: /* least significant *bit* is read first */
392 if(!op->b_o_s){
393 /* Not the initial packet */
394 return(OV_EBADHEADER);
395 }
396 if(vi->rate!=0){
397 /* previously initialized info header */
398 return(OV_EBADHEADER);
399 }
400
401 return(_vorbis_unpack_info(vi,&opb));
402
403 case 0x03: /* least significant *bit* is read first */
404 if(vi->rate==0){
405 /* um... we didn't get the initial header */
406 return(OV_EBADHEADER);
407 }
408 if(vc->vendor!=NULL){
409 /* previously initialized comment header */
410 return(OV_EBADHEADER);
411 }
412
413 return(_vorbis_unpack_comment(vc,&opb));
414
415 case 0x05: /* least significant *bit* is read first */
416 if(vi->rate==0 || vc->vendor==NULL){
417 /* um... we didn;t get the initial header or comments yet */
418 return(OV_EBADHEADER);
419 }
420 if(vi->codec_setup==NULL){
421 /* improperly initialized vorbis_info */
422 return(OV_EFAULT);
423 }
424 if(((codec_setup_info *)vi->codec_setup)->books>0){
425 /* previously initialized setup header */
426 return(OV_EBADHEADER);
427 }
428
429 return(_vorbis_unpack_books(vi,&opb));
430
431 default:
432 /* Not a valid vorbis header type */
433 return(OV_EBADHEADER);
434 break;
435 }
436 }
437 }
438 return(OV_EBADHEADER);
439 }
440
441 /* pack side **********************************************************/
442
_vorbis_pack_info(oggpack_buffer * opb,vorbis_info * vi)443 static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){
444 codec_setup_info *ci=vi->codec_setup;
445 if(!ci||
446 ci->blocksizes[0]<64||
447 ci->blocksizes[1]<ci->blocksizes[0]){
448 return(OV_EFAULT);
449 }
450
451 /* preamble */
452 oggpack_write(opb,0x01,8);
453 _v_writestring(opb,"vorbis", 6);
454
455 /* basic information about the stream */
456 oggpack_write(opb,0x00,32);
457 oggpack_write(opb,vi->channels,8);
458 oggpack_write(opb,vi->rate,32);
459
460 oggpack_write(opb,vi->bitrate_upper,32);
461 oggpack_write(opb,vi->bitrate_nominal,32);
462 oggpack_write(opb,vi->bitrate_lower,32);
463
464 oggpack_write(opb,ov_ilog(ci->blocksizes[0]-1),4);
465 oggpack_write(opb,ov_ilog(ci->blocksizes[1]-1),4);
466 oggpack_write(opb,1,1);
467
468 return(0);
469 }
470
_vorbis_pack_comment(oggpack_buffer * opb,vorbis_comment * vc)471 static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){
472 int bytes = strlen(ENCODE_VENDOR_STRING);
473
474 /* preamble */
475 oggpack_write(opb,0x03,8);
476 _v_writestring(opb,"vorbis", 6);
477
478 /* vendor */
479 oggpack_write(opb,bytes,32);
480 _v_writestring(opb,ENCODE_VENDOR_STRING, bytes);
481
482 /* comments */
483
484 oggpack_write(opb,vc->comments,32);
485 if(vc->comments){
486 int i;
487 for(i=0;i<vc->comments;i++){
488 if(vc->user_comments[i]){
489 oggpack_write(opb,vc->comment_lengths[i],32);
490 _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
491 }else{
492 oggpack_write(opb,0,32);
493 }
494 }
495 }
496 oggpack_write(opb,1,1);
497
498 return(0);
499 }
500
_vorbis_pack_books(oggpack_buffer * opb,vorbis_info * vi)501 static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){
502 codec_setup_info *ci=vi->codec_setup;
503 int i;
504 if(!ci)return(OV_EFAULT);
505
506 oggpack_write(opb,0x05,8);
507 _v_writestring(opb,"vorbis", 6);
508
509 /* books */
510 oggpack_write(opb,ci->books-1,8);
511 for(i=0;i<ci->books;i++)
512 if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out;
513
514 /* times; hook placeholders */
515 oggpack_write(opb,0,6);
516 oggpack_write(opb,0,16);
517
518 /* floors */
519 oggpack_write(opb,ci->floors-1,6);
520 for(i=0;i<ci->floors;i++){
521 oggpack_write(opb,ci->floor_type[i],16);
522 if(_floor_P[ci->floor_type[i]]->pack)
523 _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb);
524 else
525 goto err_out;
526 }
527
528 /* residues */
529 oggpack_write(opb,ci->residues-1,6);
530 for(i=0;i<ci->residues;i++){
531 oggpack_write(opb,ci->residue_type[i],16);
532 _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb);
533 }
534
535 /* maps */
536 oggpack_write(opb,ci->maps-1,6);
537 for(i=0;i<ci->maps;i++){
538 oggpack_write(opb,ci->map_type[i],16);
539 _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb);
540 }
541
542 /* modes */
543 oggpack_write(opb,ci->modes-1,6);
544 for(i=0;i<ci->modes;i++){
545 oggpack_write(opb,ci->mode_param[i]->blockflag,1);
546 oggpack_write(opb,ci->mode_param[i]->windowtype,16);
547 oggpack_write(opb,ci->mode_param[i]->transformtype,16);
548 oggpack_write(opb,ci->mode_param[i]->mapping,8);
549 }
550 oggpack_write(opb,1,1);
551
552 return(0);
553 err_out:
554 return(-1);
555 }
556
vorbis_commentheader_out(vorbis_comment * vc,ogg_packet * op)557 int vorbis_commentheader_out(vorbis_comment *vc,
558 ogg_packet *op){
559
560 oggpack_buffer opb;
561
562 oggpack_writeinit(&opb);
563 if(_vorbis_pack_comment(&opb,vc)){
564 oggpack_writeclear(&opb);
565 return OV_EIMPL;
566 }
567
568 op->packet = _ogg_malloc(oggpack_bytes(&opb));
569 memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));
570
571 op->bytes=oggpack_bytes(&opb);
572 op->b_o_s=0;
573 op->e_o_s=0;
574 op->granulepos=0;
575 op->packetno=1;
576
577 oggpack_writeclear(&opb);
578 return 0;
579 }
580
vorbis_analysis_headerout(vorbis_dsp_state * v,vorbis_comment * vc,ogg_packet * op,ogg_packet * op_comm,ogg_packet * op_code)581 int vorbis_analysis_headerout(vorbis_dsp_state *v,
582 vorbis_comment *vc,
583 ogg_packet *op,
584 ogg_packet *op_comm,
585 ogg_packet *op_code){
586 int ret=OV_EIMPL;
587 vorbis_info *vi=v->vi;
588 oggpack_buffer opb;
589 private_state *b=v->backend_state;
590
591 if(!b||vi->channels<=0||vi->channels>256){
592 b = NULL;
593 ret=OV_EFAULT;
594 goto err_out;
595 }
596
597 /* first header packet **********************************************/
598
599 oggpack_writeinit(&opb);
600 if(_vorbis_pack_info(&opb,vi))goto err_out;
601
602 /* build the packet */
603 if(b->header)_ogg_free(b->header);
604 b->header=_ogg_malloc(oggpack_bytes(&opb));
605 memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
606 op->packet=b->header;
607 op->bytes=oggpack_bytes(&opb);
608 op->b_o_s=1;
609 op->e_o_s=0;
610 op->granulepos=0;
611 op->packetno=0;
612
613 /* second header packet (comments) **********************************/
614
615 oggpack_reset(&opb);
616 if(_vorbis_pack_comment(&opb,vc))goto err_out;
617
618 if(b->header1)_ogg_free(b->header1);
619 b->header1=_ogg_malloc(oggpack_bytes(&opb));
620 memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
621 op_comm->packet=b->header1;
622 op_comm->bytes=oggpack_bytes(&opb);
623 op_comm->b_o_s=0;
624 op_comm->e_o_s=0;
625 op_comm->granulepos=0;
626 op_comm->packetno=1;
627
628 /* third header packet (modes/codebooks) ****************************/
629
630 oggpack_reset(&opb);
631 if(_vorbis_pack_books(&opb,vi))goto err_out;
632
633 if(b->header2)_ogg_free(b->header2);
634 b->header2=_ogg_malloc(oggpack_bytes(&opb));
635 memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
636 op_code->packet=b->header2;
637 op_code->bytes=oggpack_bytes(&opb);
638 op_code->b_o_s=0;
639 op_code->e_o_s=0;
640 op_code->granulepos=0;
641 op_code->packetno=2;
642
643 oggpack_writeclear(&opb);
644 return(0);
645 err_out:
646 memset(op,0,sizeof(*op));
647 memset(op_comm,0,sizeof(*op_comm));
648 memset(op_code,0,sizeof(*op_code));
649
650 if(b){
651 if(vi->channels>0)oggpack_writeclear(&opb);
652 if(b->header)_ogg_free(b->header);
653 if(b->header1)_ogg_free(b->header1);
654 if(b->header2)_ogg_free(b->header2);
655 b->header=NULL;
656 b->header1=NULL;
657 b->header2=NULL;
658 }
659 return(ret);
660 }
661
vorbis_granule_time(vorbis_dsp_state * v,ogg_int64_t granulepos)662 double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){
663 if(granulepos == -1) return -1;
664
665 /* We're not guaranteed a 64 bit unsigned type everywhere, so we
666 have to put the unsigned granpo in a signed type. */
667 if(granulepos>=0){
668 return((double)granulepos/v->vi->rate);
669 }else{
670 ogg_int64_t granuleoff=0xffffffff;
671 granuleoff<<=31;
672 granuleoff|=0x7ffffffff;
673 return(((double)granulepos+2+granuleoff+granuleoff)/v->vi->rate);
674 }
675 }
676
vorbis_version_string(void)677 const char *vorbis_version_string(void){
678 return GENERAL_VENDOR_STRING;
679 }
680