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annotate libs/vorbis/info.c @ 1:e7ca128b8713

find changesets by author, revision, files, or words in the commit message
looks nice :)
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 00:35:22 +0200
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rev   line source
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 1994-2010 *
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: maintain the info structure, info <-> header packets
nuclear@0 14 last mod: $Id: info.c 18186 2012-02-03 22:08:44Z xiphmont $
nuclear@0 15
nuclear@0 16 ********************************************************************/
nuclear@0 17
nuclear@0 18 /* general handling of the header and the vorbis_info structure (and
nuclear@0 19 substructures) */
nuclear@0 20
nuclear@0 21 #include <stdlib.h>
nuclear@0 22 #include <string.h>
nuclear@0 23 #include <ctype.h>
nuclear@0 24 #include <ogg/ogg.h>
nuclear@0 25 #include "vorbis/codec.h"
nuclear@0 26 #include "codec_internal.h"
nuclear@0 27 #include "codebook.h"
nuclear@0 28 #include "registry.h"
nuclear@0 29 #include "window.h"
nuclear@0 30 #include "psy.h"
nuclear@0 31 #include "misc.h"
nuclear@0 32 #include "os.h"
nuclear@0 33
nuclear@0 34 #define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.3"
nuclear@0 35 #define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20120203 (Omnipresent)"
nuclear@0 36
nuclear@0 37 /* helpers */
nuclear@0 38 static int ilog2(unsigned int v){
nuclear@0 39 int ret=0;
nuclear@0 40 if(v)--v;
nuclear@0 41 while(v){
nuclear@0 42 ret++;
nuclear@0 43 v>>=1;
nuclear@0 44 }
nuclear@0 45 return(ret);
nuclear@0 46 }
nuclear@0 47
nuclear@0 48 static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
nuclear@0 49
nuclear@0 50 while(bytes--){
nuclear@0 51 oggpack_write(o,*s++,8);
nuclear@0 52 }
nuclear@0 53 }
nuclear@0 54
nuclear@0 55 static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
nuclear@0 56 while(bytes--){
nuclear@0 57 *buf++=oggpack_read(o,8);
nuclear@0 58 }
nuclear@0 59 }
nuclear@0 60
nuclear@0 61 void vorbis_comment_init(vorbis_comment *vc){
nuclear@0 62 memset(vc,0,sizeof(*vc));
nuclear@0 63 }
nuclear@0 64
nuclear@0 65 void vorbis_comment_add(vorbis_comment *vc,const char *comment){
nuclear@0 66 vc->user_comments=_ogg_realloc(vc->user_comments,
nuclear@0 67 (vc->comments+2)*sizeof(*vc->user_comments));
nuclear@0 68 vc->comment_lengths=_ogg_realloc(vc->comment_lengths,
nuclear@0 69 (vc->comments+2)*sizeof(*vc->comment_lengths));
nuclear@0 70 vc->comment_lengths[vc->comments]=strlen(comment);
nuclear@0 71 vc->user_comments[vc->comments]=_ogg_malloc(vc->comment_lengths[vc->comments]+1);
nuclear@0 72 strcpy(vc->user_comments[vc->comments], comment);
nuclear@0 73 vc->comments++;
nuclear@0 74 vc->user_comments[vc->comments]=NULL;
nuclear@0 75 }
nuclear@0 76
nuclear@0 77 void vorbis_comment_add_tag(vorbis_comment *vc, const char *tag, const char *contents){
nuclear@0 78 char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */
nuclear@0 79 strcpy(comment, tag);
nuclear@0 80 strcat(comment, "=");
nuclear@0 81 strcat(comment, contents);
nuclear@0 82 vorbis_comment_add(vc, comment);
nuclear@0 83 }
nuclear@0 84
nuclear@0 85 /* This is more or less the same as strncasecmp - but that doesn't exist
nuclear@0 86 * everywhere, and this is a fairly trivial function, so we include it */
nuclear@0 87 static int tagcompare(const char *s1, const char *s2, int n){
nuclear@0 88 int c=0;
nuclear@0 89 while(c < n){
nuclear@0 90 if(toupper(s1[c]) != toupper(s2[c]))
nuclear@0 91 return !0;
nuclear@0 92 c++;
nuclear@0 93 }
nuclear@0 94 return 0;
nuclear@0 95 }
nuclear@0 96
nuclear@0 97 char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count){
nuclear@0 98 long i;
nuclear@0 99 int found = 0;
nuclear@0 100 int taglen = strlen(tag)+1; /* +1 for the = we append */
nuclear@0 101 char *fulltag = alloca(taglen+ 1);
nuclear@0 102
nuclear@0 103 strcpy(fulltag, tag);
nuclear@0 104 strcat(fulltag, "=");
nuclear@0 105
nuclear@0 106 for(i=0;i<vc->comments;i++){
nuclear@0 107 if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
nuclear@0 108 if(count == found)
nuclear@0 109 /* We return a pointer to the data, not a copy */
nuclear@0 110 return vc->user_comments[i] + taglen;
nuclear@0 111 else
nuclear@0 112 found++;
nuclear@0 113 }
nuclear@0 114 }
nuclear@0 115 return NULL; /* didn't find anything */
nuclear@0 116 }
nuclear@0 117
nuclear@0 118 int vorbis_comment_query_count(vorbis_comment *vc, const char *tag){
nuclear@0 119 int i,count=0;
nuclear@0 120 int taglen = strlen(tag)+1; /* +1 for the = we append */
nuclear@0 121 char *fulltag = alloca(taglen+1);
nuclear@0 122 strcpy(fulltag,tag);
nuclear@0 123 strcat(fulltag, "=");
nuclear@0 124
nuclear@0 125 for(i=0;i<vc->comments;i++){
nuclear@0 126 if(!tagcompare(vc->user_comments[i], fulltag, taglen))
nuclear@0 127 count++;
nuclear@0 128 }
nuclear@0 129
nuclear@0 130 return count;
nuclear@0 131 }
nuclear@0 132
nuclear@0 133 void vorbis_comment_clear(vorbis_comment *vc){
nuclear@0 134 if(vc){
nuclear@0 135 long i;
nuclear@0 136 if(vc->user_comments){
nuclear@0 137 for(i=0;i<vc->comments;i++)
nuclear@0 138 if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
nuclear@0 139 _ogg_free(vc->user_comments);
nuclear@0 140 }
nuclear@0 141 if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
nuclear@0 142 if(vc->vendor)_ogg_free(vc->vendor);
nuclear@0 143 memset(vc,0,sizeof(*vc));
nuclear@0 144 }
nuclear@0 145 }
nuclear@0 146
nuclear@0 147 /* blocksize 0 is guaranteed to be short, 1 is guaranteed to be long.
nuclear@0 148 They may be equal, but short will never ge greater than long */
nuclear@0 149 int vorbis_info_blocksize(vorbis_info *vi,int zo){
nuclear@0 150 codec_setup_info *ci = vi->codec_setup;
nuclear@0 151 return ci ? ci->blocksizes[zo] : -1;
nuclear@0 152 }
nuclear@0 153
nuclear@0 154 /* used by synthesis, which has a full, alloced vi */
nuclear@0 155 void vorbis_info_init(vorbis_info *vi){
nuclear@0 156 memset(vi,0,sizeof(*vi));
nuclear@0 157 vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info));
nuclear@0 158 }
nuclear@0 159
nuclear@0 160 void vorbis_info_clear(vorbis_info *vi){
nuclear@0 161 codec_setup_info *ci=vi->codec_setup;
nuclear@0 162 int i;
nuclear@0 163
nuclear@0 164 if(ci){
nuclear@0 165
nuclear@0 166 for(i=0;i<ci->modes;i++)
nuclear@0 167 if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
nuclear@0 168
nuclear@0 169 for(i=0;i<ci->maps;i++) /* unpack does the range checking */
nuclear@0 170 if(ci->map_param[i]) /* this may be cleaning up an aborted
nuclear@0 171 unpack, in which case the below type
nuclear@0 172 cannot be trusted */
nuclear@0 173 _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
nuclear@0 174
nuclear@0 175 for(i=0;i<ci->floors;i++) /* unpack does the range checking */
nuclear@0 176 if(ci->floor_param[i]) /* this may be cleaning up an aborted
nuclear@0 177 unpack, in which case the below type
nuclear@0 178 cannot be trusted */
nuclear@0 179 _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
nuclear@0 180
nuclear@0 181 for(i=0;i<ci->residues;i++) /* unpack does the range checking */
nuclear@0 182 if(ci->residue_param[i]) /* this may be cleaning up an aborted
nuclear@0 183 unpack, in which case the below type
nuclear@0 184 cannot be trusted */
nuclear@0 185 _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
nuclear@0 186
nuclear@0 187 for(i=0;i<ci->books;i++){
nuclear@0 188 if(ci->book_param[i]){
nuclear@0 189 /* knows if the book was not alloced */
nuclear@0 190 vorbis_staticbook_destroy(ci->book_param[i]);
nuclear@0 191 }
nuclear@0 192 if(ci->fullbooks)
nuclear@0 193 vorbis_book_clear(ci->fullbooks+i);
nuclear@0 194 }
nuclear@0 195 if(ci->fullbooks)
nuclear@0 196 _ogg_free(ci->fullbooks);
nuclear@0 197
nuclear@0 198 for(i=0;i<ci->psys;i++)
nuclear@0 199 _vi_psy_free(ci->psy_param[i]);
nuclear@0 200
nuclear@0 201 _ogg_free(ci);
nuclear@0 202 }
nuclear@0 203
nuclear@0 204 memset(vi,0,sizeof(*vi));
nuclear@0 205 }
nuclear@0 206
nuclear@0 207 /* Header packing/unpacking ********************************************/
nuclear@0 208
nuclear@0 209 static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
nuclear@0 210 codec_setup_info *ci=vi->codec_setup;
nuclear@0 211 if(!ci)return(OV_EFAULT);
nuclear@0 212
nuclear@0 213 vi->version=oggpack_read(opb,32);
nuclear@0 214 if(vi->version!=0)return(OV_EVERSION);
nuclear@0 215
nuclear@0 216 vi->channels=oggpack_read(opb,8);
nuclear@0 217 vi->rate=oggpack_read(opb,32);
nuclear@0 218
nuclear@0 219 vi->bitrate_upper=oggpack_read(opb,32);
nuclear@0 220 vi->bitrate_nominal=oggpack_read(opb,32);
nuclear@0 221 vi->bitrate_lower=oggpack_read(opb,32);
nuclear@0 222
nuclear@0 223 ci->blocksizes[0]=1<<oggpack_read(opb,4);
nuclear@0 224 ci->blocksizes[1]=1<<oggpack_read(opb,4);
nuclear@0 225
nuclear@0 226 if(vi->rate<1)goto err_out;
nuclear@0 227 if(vi->channels<1)goto err_out;
nuclear@0 228 if(ci->blocksizes[0]<64)goto err_out;
nuclear@0 229 if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
nuclear@0 230 if(ci->blocksizes[1]>8192)goto err_out;
nuclear@0 231
nuclear@0 232 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
nuclear@0 233
nuclear@0 234 return(0);
nuclear@0 235 err_out:
nuclear@0 236 vorbis_info_clear(vi);
nuclear@0 237 return(OV_EBADHEADER);
nuclear@0 238 }
nuclear@0 239
nuclear@0 240 static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
nuclear@0 241 int i;
nuclear@0 242 int vendorlen=oggpack_read(opb,32);
nuclear@0 243 if(vendorlen<0)goto err_out;
nuclear@0 244 if(vendorlen>opb->storage-8)goto err_out;
nuclear@0 245 vc->vendor=_ogg_calloc(vendorlen+1,1);
nuclear@0 246 _v_readstring(opb,vc->vendor,vendorlen);
nuclear@0 247 i=oggpack_read(opb,32);
nuclear@0 248 if(i<0)goto err_out;
nuclear@0 249 if(i>((opb->storage-oggpack_bytes(opb))>>2))goto err_out;
nuclear@0 250 vc->comments=i;
nuclear@0 251 vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
nuclear@0 252 vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
nuclear@0 253
nuclear@0 254 for(i=0;i<vc->comments;i++){
nuclear@0 255 int len=oggpack_read(opb,32);
nuclear@0 256 if(len<0)goto err_out;
nuclear@0 257 if(len>opb->storage-oggpack_bytes(opb))goto err_out;
nuclear@0 258 vc->comment_lengths[i]=len;
nuclear@0 259 vc->user_comments[i]=_ogg_calloc(len+1,1);
nuclear@0 260 _v_readstring(opb,vc->user_comments[i],len);
nuclear@0 261 }
nuclear@0 262 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
nuclear@0 263
nuclear@0 264 return(0);
nuclear@0 265 err_out:
nuclear@0 266 vorbis_comment_clear(vc);
nuclear@0 267 return(OV_EBADHEADER);
nuclear@0 268 }
nuclear@0 269
nuclear@0 270 /* all of the real encoding details are here. The modes, books,
nuclear@0 271 everything */
nuclear@0 272 static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
nuclear@0 273 codec_setup_info *ci=vi->codec_setup;
nuclear@0 274 int i;
nuclear@0 275 if(!ci)return(OV_EFAULT);
nuclear@0 276
nuclear@0 277 /* codebooks */
nuclear@0 278 ci->books=oggpack_read(opb,8)+1;
nuclear@0 279 if(ci->books<=0)goto err_out;
nuclear@0 280 for(i=0;i<ci->books;i++){
nuclear@0 281 ci->book_param[i]=vorbis_staticbook_unpack(opb);
nuclear@0 282 if(!ci->book_param[i])goto err_out;
nuclear@0 283 }
nuclear@0 284
nuclear@0 285 /* time backend settings; hooks are unused */
nuclear@0 286 {
nuclear@0 287 int times=oggpack_read(opb,6)+1;
nuclear@0 288 if(times<=0)goto err_out;
nuclear@0 289 for(i=0;i<times;i++){
nuclear@0 290 int test=oggpack_read(opb,16);
nuclear@0 291 if(test<0 || test>=VI_TIMEB)goto err_out;
nuclear@0 292 }
nuclear@0 293 }
nuclear@0 294
nuclear@0 295 /* floor backend settings */
nuclear@0 296 ci->floors=oggpack_read(opb,6)+1;
nuclear@0 297 if(ci->floors<=0)goto err_out;
nuclear@0 298 for(i=0;i<ci->floors;i++){
nuclear@0 299 ci->floor_type[i]=oggpack_read(opb,16);
nuclear@0 300 if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
nuclear@0 301 ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
nuclear@0 302 if(!ci->floor_param[i])goto err_out;
nuclear@0 303 }
nuclear@0 304
nuclear@0 305 /* residue backend settings */
nuclear@0 306 ci->residues=oggpack_read(opb,6)+1;
nuclear@0 307 if(ci->residues<=0)goto err_out;
nuclear@0 308 for(i=0;i<ci->residues;i++){
nuclear@0 309 ci->residue_type[i]=oggpack_read(opb,16);
nuclear@0 310 if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
nuclear@0 311 ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
nuclear@0 312 if(!ci->residue_param[i])goto err_out;
nuclear@0 313 }
nuclear@0 314
nuclear@0 315 /* map backend settings */
nuclear@0 316 ci->maps=oggpack_read(opb,6)+1;
nuclear@0 317 if(ci->maps<=0)goto err_out;
nuclear@0 318 for(i=0;i<ci->maps;i++){
nuclear@0 319 ci->map_type[i]=oggpack_read(opb,16);
nuclear@0 320 if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
nuclear@0 321 ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
nuclear@0 322 if(!ci->map_param[i])goto err_out;
nuclear@0 323 }
nuclear@0 324
nuclear@0 325 /* mode settings */
nuclear@0 326 ci->modes=oggpack_read(opb,6)+1;
nuclear@0 327 if(ci->modes<=0)goto err_out;
nuclear@0 328 for(i=0;i<ci->modes;i++){
nuclear@0 329 ci->mode_param[i]=_ogg_calloc(1,sizeof(*ci->mode_param[i]));
nuclear@0 330 ci->mode_param[i]->blockflag=oggpack_read(opb,1);
nuclear@0 331 ci->mode_param[i]->windowtype=oggpack_read(opb,16);
nuclear@0 332 ci->mode_param[i]->transformtype=oggpack_read(opb,16);
nuclear@0 333 ci->mode_param[i]->mapping=oggpack_read(opb,8);
nuclear@0 334
nuclear@0 335 if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
nuclear@0 336 if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
nuclear@0 337 if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
nuclear@0 338 if(ci->mode_param[i]->mapping<0)goto err_out;
nuclear@0 339 }
nuclear@0 340
nuclear@0 341 if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
nuclear@0 342
nuclear@0 343 return(0);
nuclear@0 344 err_out:
nuclear@0 345 vorbis_info_clear(vi);
nuclear@0 346 return(OV_EBADHEADER);
nuclear@0 347 }
nuclear@0 348
nuclear@0 349 /* Is this packet a vorbis ID header? */
nuclear@0 350 int vorbis_synthesis_idheader(ogg_packet *op){
nuclear@0 351 oggpack_buffer opb;
nuclear@0 352 char buffer[6];
nuclear@0 353
nuclear@0 354 if(op){
nuclear@0 355 oggpack_readinit(&opb,op->packet,op->bytes);
nuclear@0 356
nuclear@0 357 if(!op->b_o_s)
nuclear@0 358 return(0); /* Not the initial packet */
nuclear@0 359
nuclear@0 360 if(oggpack_read(&opb,8) != 1)
nuclear@0 361 return 0; /* not an ID header */
nuclear@0 362
nuclear@0 363 memset(buffer,0,6);
nuclear@0 364 _v_readstring(&opb,buffer,6);
nuclear@0 365 if(memcmp(buffer,"vorbis",6))
nuclear@0 366 return 0; /* not vorbis */
nuclear@0 367
nuclear@0 368 return 1;
nuclear@0 369 }
nuclear@0 370
nuclear@0 371 return 0;
nuclear@0 372 }
nuclear@0 373
nuclear@0 374 /* The Vorbis header is in three packets; the initial small packet in
nuclear@0 375 the first page that identifies basic parameters, a second packet
nuclear@0 376 with bitstream comments and a third packet that holds the
nuclear@0 377 codebook. */
nuclear@0 378
nuclear@0 379 int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
nuclear@0 380 oggpack_buffer opb;
nuclear@0 381
nuclear@0 382 if(op){
nuclear@0 383 oggpack_readinit(&opb,op->packet,op->bytes);
nuclear@0 384
nuclear@0 385 /* Which of the three types of header is this? */
nuclear@0 386 /* Also verify header-ness, vorbis */
nuclear@0 387 {
nuclear@0 388 char buffer[6];
nuclear@0 389 int packtype=oggpack_read(&opb,8);
nuclear@0 390 memset(buffer,0,6);
nuclear@0 391 _v_readstring(&opb,buffer,6);
nuclear@0 392 if(memcmp(buffer,"vorbis",6)){
nuclear@0 393 /* not a vorbis header */
nuclear@0 394 return(OV_ENOTVORBIS);
nuclear@0 395 }
nuclear@0 396 switch(packtype){
nuclear@0 397 case 0x01: /* least significant *bit* is read first */
nuclear@0 398 if(!op->b_o_s){
nuclear@0 399 /* Not the initial packet */
nuclear@0 400 return(OV_EBADHEADER);
nuclear@0 401 }
nuclear@0 402 if(vi->rate!=0){
nuclear@0 403 /* previously initialized info header */
nuclear@0 404 return(OV_EBADHEADER);
nuclear@0 405 }
nuclear@0 406
nuclear@0 407 return(_vorbis_unpack_info(vi,&opb));
nuclear@0 408
nuclear@0 409 case 0x03: /* least significant *bit* is read first */
nuclear@0 410 if(vi->rate==0){
nuclear@0 411 /* um... we didn't get the initial header */
nuclear@0 412 return(OV_EBADHEADER);
nuclear@0 413 }
nuclear@0 414
nuclear@0 415 return(_vorbis_unpack_comment(vc,&opb));
nuclear@0 416
nuclear@0 417 case 0x05: /* least significant *bit* is read first */
nuclear@0 418 if(vi->rate==0 || vc->vendor==NULL){
nuclear@0 419 /* um... we didn;t get the initial header or comments yet */
nuclear@0 420 return(OV_EBADHEADER);
nuclear@0 421 }
nuclear@0 422
nuclear@0 423 return(_vorbis_unpack_books(vi,&opb));
nuclear@0 424
nuclear@0 425 default:
nuclear@0 426 /* Not a valid vorbis header type */
nuclear@0 427 return(OV_EBADHEADER);
nuclear@0 428 break;
nuclear@0 429 }
nuclear@0 430 }
nuclear@0 431 }
nuclear@0 432 return(OV_EBADHEADER);
nuclear@0 433 }
nuclear@0 434
nuclear@0 435 /* pack side **********************************************************/
nuclear@0 436
nuclear@0 437 static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){
nuclear@0 438 codec_setup_info *ci=vi->codec_setup;
nuclear@0 439 if(!ci)return(OV_EFAULT);
nuclear@0 440
nuclear@0 441 /* preamble */
nuclear@0 442 oggpack_write(opb,0x01,8);
nuclear@0 443 _v_writestring(opb,"vorbis", 6);
nuclear@0 444
nuclear@0 445 /* basic information about the stream */
nuclear@0 446 oggpack_write(opb,0x00,32);
nuclear@0 447 oggpack_write(opb,vi->channels,8);
nuclear@0 448 oggpack_write(opb,vi->rate,32);
nuclear@0 449
nuclear@0 450 oggpack_write(opb,vi->bitrate_upper,32);
nuclear@0 451 oggpack_write(opb,vi->bitrate_nominal,32);
nuclear@0 452 oggpack_write(opb,vi->bitrate_lower,32);
nuclear@0 453
nuclear@0 454 oggpack_write(opb,ilog2(ci->blocksizes[0]),4);
nuclear@0 455 oggpack_write(opb,ilog2(ci->blocksizes[1]),4);
nuclear@0 456 oggpack_write(opb,1,1);
nuclear@0 457
nuclear@0 458 return(0);
nuclear@0 459 }
nuclear@0 460
nuclear@0 461 static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){
nuclear@0 462 int bytes = strlen(ENCODE_VENDOR_STRING);
nuclear@0 463
nuclear@0 464 /* preamble */
nuclear@0 465 oggpack_write(opb,0x03,8);
nuclear@0 466 _v_writestring(opb,"vorbis", 6);
nuclear@0 467
nuclear@0 468 /* vendor */
nuclear@0 469 oggpack_write(opb,bytes,32);
nuclear@0 470 _v_writestring(opb,ENCODE_VENDOR_STRING, bytes);
nuclear@0 471
nuclear@0 472 /* comments */
nuclear@0 473
nuclear@0 474 oggpack_write(opb,vc->comments,32);
nuclear@0 475 if(vc->comments){
nuclear@0 476 int i;
nuclear@0 477 for(i=0;i<vc->comments;i++){
nuclear@0 478 if(vc->user_comments[i]){
nuclear@0 479 oggpack_write(opb,vc->comment_lengths[i],32);
nuclear@0 480 _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
nuclear@0 481 }else{
nuclear@0 482 oggpack_write(opb,0,32);
nuclear@0 483 }
nuclear@0 484 }
nuclear@0 485 }
nuclear@0 486 oggpack_write(opb,1,1);
nuclear@0 487
nuclear@0 488 return(0);
nuclear@0 489 }
nuclear@0 490
nuclear@0 491 static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){
nuclear@0 492 codec_setup_info *ci=vi->codec_setup;
nuclear@0 493 int i;
nuclear@0 494 if(!ci)return(OV_EFAULT);
nuclear@0 495
nuclear@0 496 oggpack_write(opb,0x05,8);
nuclear@0 497 _v_writestring(opb,"vorbis", 6);
nuclear@0 498
nuclear@0 499 /* books */
nuclear@0 500 oggpack_write(opb,ci->books-1,8);
nuclear@0 501 for(i=0;i<ci->books;i++)
nuclear@0 502 if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out;
nuclear@0 503
nuclear@0 504 /* times; hook placeholders */
nuclear@0 505 oggpack_write(opb,0,6);
nuclear@0 506 oggpack_write(opb,0,16);
nuclear@0 507
nuclear@0 508 /* floors */
nuclear@0 509 oggpack_write(opb,ci->floors-1,6);
nuclear@0 510 for(i=0;i<ci->floors;i++){
nuclear@0 511 oggpack_write(opb,ci->floor_type[i],16);
nuclear@0 512 if(_floor_P[ci->floor_type[i]]->pack)
nuclear@0 513 _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb);
nuclear@0 514 else
nuclear@0 515 goto err_out;
nuclear@0 516 }
nuclear@0 517
nuclear@0 518 /* residues */
nuclear@0 519 oggpack_write(opb,ci->residues-1,6);
nuclear@0 520 for(i=0;i<ci->residues;i++){
nuclear@0 521 oggpack_write(opb,ci->residue_type[i],16);
nuclear@0 522 _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb);
nuclear@0 523 }
nuclear@0 524
nuclear@0 525 /* maps */
nuclear@0 526 oggpack_write(opb,ci->maps-1,6);
nuclear@0 527 for(i=0;i<ci->maps;i++){
nuclear@0 528 oggpack_write(opb,ci->map_type[i],16);
nuclear@0 529 _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb);
nuclear@0 530 }
nuclear@0 531
nuclear@0 532 /* modes */
nuclear@0 533 oggpack_write(opb,ci->modes-1,6);
nuclear@0 534 for(i=0;i<ci->modes;i++){
nuclear@0 535 oggpack_write(opb,ci->mode_param[i]->blockflag,1);
nuclear@0 536 oggpack_write(opb,ci->mode_param[i]->windowtype,16);
nuclear@0 537 oggpack_write(opb,ci->mode_param[i]->transformtype,16);
nuclear@0 538 oggpack_write(opb,ci->mode_param[i]->mapping,8);
nuclear@0 539 }
nuclear@0 540 oggpack_write(opb,1,1);
nuclear@0 541
nuclear@0 542 return(0);
nuclear@0 543 err_out:
nuclear@0 544 return(-1);
nuclear@0 545 }
nuclear@0 546
nuclear@0 547 int vorbis_commentheader_out(vorbis_comment *vc,
nuclear@0 548 ogg_packet *op){
nuclear@0 549
nuclear@0 550 oggpack_buffer opb;
nuclear@0 551
nuclear@0 552 oggpack_writeinit(&opb);
nuclear@0 553 if(_vorbis_pack_comment(&opb,vc)){
nuclear@0 554 oggpack_writeclear(&opb);
nuclear@0 555 return OV_EIMPL;
nuclear@0 556 }
nuclear@0 557
nuclear@0 558 op->packet = _ogg_malloc(oggpack_bytes(&opb));
nuclear@0 559 memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));
nuclear@0 560
nuclear@0 561 op->bytes=oggpack_bytes(&opb);
nuclear@0 562 op->b_o_s=0;
nuclear@0 563 op->e_o_s=0;
nuclear@0 564 op->granulepos=0;
nuclear@0 565 op->packetno=1;
nuclear@0 566
nuclear@0 567 oggpack_writeclear(&opb);
nuclear@0 568 return 0;
nuclear@0 569 }
nuclear@0 570
nuclear@0 571 int vorbis_analysis_headerout(vorbis_dsp_state *v,
nuclear@0 572 vorbis_comment *vc,
nuclear@0 573 ogg_packet *op,
nuclear@0 574 ogg_packet *op_comm,
nuclear@0 575 ogg_packet *op_code){
nuclear@0 576 int ret=OV_EIMPL;
nuclear@0 577 vorbis_info *vi=v->vi;
nuclear@0 578 oggpack_buffer opb;
nuclear@0 579 private_state *b=v->backend_state;
nuclear@0 580
nuclear@0 581 if(!b){
nuclear@0 582 ret=OV_EFAULT;
nuclear@0 583 goto err_out;
nuclear@0 584 }
nuclear@0 585
nuclear@0 586 /* first header packet **********************************************/
nuclear@0 587
nuclear@0 588 oggpack_writeinit(&opb);
nuclear@0 589 if(_vorbis_pack_info(&opb,vi))goto err_out;
nuclear@0 590
nuclear@0 591 /* build the packet */
nuclear@0 592 if(b->header)_ogg_free(b->header);
nuclear@0 593 b->header=_ogg_malloc(oggpack_bytes(&opb));
nuclear@0 594 memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
nuclear@0 595 op->packet=b->header;
nuclear@0 596 op->bytes=oggpack_bytes(&opb);
nuclear@0 597 op->b_o_s=1;
nuclear@0 598 op->e_o_s=0;
nuclear@0 599 op->granulepos=0;
nuclear@0 600 op->packetno=0;
nuclear@0 601
nuclear@0 602 /* second header packet (comments) **********************************/
nuclear@0 603
nuclear@0 604 oggpack_reset(&opb);
nuclear@0 605 if(_vorbis_pack_comment(&opb,vc))goto err_out;
nuclear@0 606
nuclear@0 607 if(b->header1)_ogg_free(b->header1);
nuclear@0 608 b->header1=_ogg_malloc(oggpack_bytes(&opb));
nuclear@0 609 memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
nuclear@0 610 op_comm->packet=b->header1;
nuclear@0 611 op_comm->bytes=oggpack_bytes(&opb);
nuclear@0 612 op_comm->b_o_s=0;
nuclear@0 613 op_comm->e_o_s=0;
nuclear@0 614 op_comm->granulepos=0;
nuclear@0 615 op_comm->packetno=1;
nuclear@0 616
nuclear@0 617 /* third header packet (modes/codebooks) ****************************/
nuclear@0 618
nuclear@0 619 oggpack_reset(&opb);
nuclear@0 620 if(_vorbis_pack_books(&opb,vi))goto err_out;
nuclear@0 621
nuclear@0 622 if(b->header2)_ogg_free(b->header2);
nuclear@0 623 b->header2=_ogg_malloc(oggpack_bytes(&opb));
nuclear@0 624 memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
nuclear@0 625 op_code->packet=b->header2;
nuclear@0 626 op_code->bytes=oggpack_bytes(&opb);
nuclear@0 627 op_code->b_o_s=0;
nuclear@0 628 op_code->e_o_s=0;
nuclear@0 629 op_code->granulepos=0;
nuclear@0 630 op_code->packetno=2;
nuclear@0 631
nuclear@0 632 oggpack_writeclear(&opb);
nuclear@0 633 return(0);
nuclear@0 634 err_out:
nuclear@0 635 memset(op,0,sizeof(*op));
nuclear@0 636 memset(op_comm,0,sizeof(*op_comm));
nuclear@0 637 memset(op_code,0,sizeof(*op_code));
nuclear@0 638
nuclear@0 639 if(b){
nuclear@0 640 oggpack_writeclear(&opb);
nuclear@0 641 if(b->header)_ogg_free(b->header);
nuclear@0 642 if(b->header1)_ogg_free(b->header1);
nuclear@0 643 if(b->header2)_ogg_free(b->header2);
nuclear@0 644 b->header=NULL;
nuclear@0 645 b->header1=NULL;
nuclear@0 646 b->header2=NULL;
nuclear@0 647 }
nuclear@0 648 return(ret);
nuclear@0 649 }
nuclear@0 650
nuclear@0 651 double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){
nuclear@0 652 if(granulepos == -1) return -1;
nuclear@0 653
nuclear@0 654 /* We're not guaranteed a 64 bit unsigned type everywhere, so we
nuclear@0 655 have to put the unsigned granpo in a signed type. */
nuclear@0 656 if(granulepos>=0){
nuclear@0 657 return((double)granulepos/v->vi->rate);
nuclear@0 658 }else{
nuclear@0 659 ogg_int64_t granuleoff=0xffffffff;
nuclear@0 660 granuleoff<<=31;
nuclear@0 661 granuleoff|=0x7ffffffff;
nuclear@0 662 return(((double)granulepos+2+granuleoff+granuleoff)/v->vi->rate);
nuclear@0 663 }
nuclear@0 664 }
nuclear@0 665
nuclear@0 666 const char *vorbis_version_string(void){
nuclear@0 667 return GENERAL_VENDOR_STRING;
nuclear@0 668 }