dbf-halloween2015

annotate libs/vorbis/info.c @ 3:c37fe5d8a4ed

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windows port
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 01 Nov 2015 06:04:28 +0200
parents
children
rev   line source
nuclear@1 1 /********************************************************************
nuclear@1 2 * *
nuclear@1 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
nuclear@1 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
nuclear@1 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
nuclear@1 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
nuclear@1 7 * *
nuclear@1 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
nuclear@1 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
nuclear@1 10 * *
nuclear@1 11 ********************************************************************
nuclear@1 12
nuclear@1 13 function: maintain the info structure, info <-> header packets
nuclear@1 14 last mod: $Id: info.c 18186 2012-02-03 22:08:44Z xiphmont $
nuclear@1 15
nuclear@1 16 ********************************************************************/
nuclear@1 17
nuclear@1 18 /* general handling of the header and the vorbis_info structure (and
nuclear@1 19 substructures) */
nuclear@1 20
nuclear@1 21 #include <stdlib.h>
nuclear@1 22 #include <string.h>
nuclear@1 23 #include <ctype.h>
nuclear@1 24 #include <ogg/ogg.h>
nuclear@1 25 #include "vorbis/codec.h"
nuclear@1 26 #include "codec_internal.h"
nuclear@1 27 #include "codebook.h"
nuclear@1 28 #include "registry.h"
nuclear@1 29 #include "window.h"
nuclear@1 30 #include "psy.h"
nuclear@1 31 #include "misc.h"
nuclear@1 32 #include "os.h"
nuclear@1 33
nuclear@1 34 #define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.3"
nuclear@1 35 #define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20120203 (Omnipresent)"
nuclear@1 36
nuclear@1 37 /* helpers */
nuclear@1 38 static int ilog2(unsigned int v){
nuclear@1 39 int ret=0;
nuclear@1 40 if(v)--v;
nuclear@1 41 while(v){
nuclear@1 42 ret++;
nuclear@1 43 v>>=1;
nuclear@1 44 }
nuclear@1 45 return(ret);
nuclear@1 46 }
nuclear@1 47
nuclear@1 48 static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
nuclear@1 49
nuclear@1 50 while(bytes--){
nuclear@1 51 oggpack_write(o,*s++,8);
nuclear@1 52 }
nuclear@1 53 }
nuclear@1 54
nuclear@1 55 static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
nuclear@1 56 while(bytes--){
nuclear@1 57 *buf++=oggpack_read(o,8);
nuclear@1 58 }
nuclear@1 59 }
nuclear@1 60
nuclear@1 61 void vorbis_comment_init(vorbis_comment *vc){
nuclear@1 62 memset(vc,0,sizeof(*vc));
nuclear@1 63 }
nuclear@1 64
nuclear@1 65 void vorbis_comment_add(vorbis_comment *vc,const char *comment){
nuclear@1 66 vc->user_comments=_ogg_realloc(vc->user_comments,
nuclear@1 67 (vc->comments+2)*sizeof(*vc->user_comments));
nuclear@1 68 vc->comment_lengths=_ogg_realloc(vc->comment_lengths,
nuclear@1 69 (vc->comments+2)*sizeof(*vc->comment_lengths));
nuclear@1 70 vc->comment_lengths[vc->comments]=strlen(comment);
nuclear@1 71 vc->user_comments[vc->comments]=_ogg_malloc(vc->comment_lengths[vc->comments]+1);
nuclear@1 72 strcpy(vc->user_comments[vc->comments], comment);
nuclear@1 73 vc->comments++;
nuclear@1 74 vc->user_comments[vc->comments]=NULL;
nuclear@1 75 }
nuclear@1 76
nuclear@1 77 void vorbis_comment_add_tag(vorbis_comment *vc, const char *tag, const char *contents){
nuclear@1 78 char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */
nuclear@1 79 strcpy(comment, tag);
nuclear@1 80 strcat(comment, "=");
nuclear@1 81 strcat(comment, contents);
nuclear@1 82 vorbis_comment_add(vc, comment);
nuclear@1 83 }
nuclear@1 84
nuclear@1 85 /* This is more or less the same as strncasecmp - but that doesn't exist
nuclear@1 86 * everywhere, and this is a fairly trivial function, so we include it */
nuclear@1 87 static int tagcompare(const char *s1, const char *s2, int n){
nuclear@1 88 int c=0;
nuclear@1 89 while(c < n){
nuclear@1 90 if(toupper(s1[c]) != toupper(s2[c]))
nuclear@1 91 return !0;
nuclear@1 92 c++;
nuclear@1 93 }
nuclear@1 94 return 0;
nuclear@1 95 }
nuclear@1 96
nuclear@1 97 char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count){
nuclear@1 98 long i;
nuclear@1 99 int found = 0;
nuclear@1 100 int taglen = strlen(tag)+1; /* +1 for the = we append */
nuclear@1 101 char *fulltag = alloca(taglen+ 1);
nuclear@1 102
nuclear@1 103 strcpy(fulltag, tag);
nuclear@1 104 strcat(fulltag, "=");
nuclear@1 105
nuclear@1 106 for(i=0;i<vc->comments;i++){
nuclear@1 107 if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
nuclear@1 108 if(count == found)
nuclear@1 109 /* We return a pointer to the data, not a copy */
nuclear@1 110 return vc->user_comments[i] + taglen;
nuclear@1 111 else
nuclear@1 112 found++;
nuclear@1 113 }
nuclear@1 114 }
nuclear@1 115 return NULL; /* didn't find anything */
nuclear@1 116 }
nuclear@1 117
nuclear@1 118 int vorbis_comment_query_count(vorbis_comment *vc, const char *tag){
nuclear@1 119 int i,count=0;
nuclear@1 120 int taglen = strlen(tag)+1; /* +1 for the = we append */
nuclear@1 121 char *fulltag = alloca(taglen+1);
nuclear@1 122 strcpy(fulltag,tag);
nuclear@1 123 strcat(fulltag, "=");
nuclear@1 124
nuclear@1 125 for(i=0;i<vc->comments;i++){
nuclear@1 126 if(!tagcompare(vc->user_comments[i], fulltag, taglen))
nuclear@1 127 count++;
nuclear@1 128 }
nuclear@1 129
nuclear@1 130 return count;
nuclear@1 131 }
nuclear@1 132
nuclear@1 133 void vorbis_comment_clear(vorbis_comment *vc){
nuclear@1 134 if(vc){
nuclear@1 135 long i;
nuclear@1 136 if(vc->user_comments){
nuclear@1 137 for(i=0;i<vc->comments;i++)
nuclear@1 138 if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
nuclear@1 139 _ogg_free(vc->user_comments);
nuclear@1 140 }
nuclear@1 141 if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
nuclear@1 142 if(vc->vendor)_ogg_free(vc->vendor);
nuclear@1 143 memset(vc,0,sizeof(*vc));
nuclear@1 144 }
nuclear@1 145 }
nuclear@1 146
nuclear@1 147 /* blocksize 0 is guaranteed to be short, 1 is guaranteed to be long.
nuclear@1 148 They may be equal, but short will never ge greater than long */
nuclear@1 149 int vorbis_info_blocksize(vorbis_info *vi,int zo){
nuclear@1 150 codec_setup_info *ci = vi->codec_setup;
nuclear@1 151 return ci ? ci->blocksizes[zo] : -1;
nuclear@1 152 }
nuclear@1 153
nuclear@1 154 /* used by synthesis, which has a full, alloced vi */
nuclear@1 155 void vorbis_info_init(vorbis_info *vi){
nuclear@1 156 memset(vi,0,sizeof(*vi));
nuclear@1 157 vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info));
nuclear@1 158 }
nuclear@1 159
nuclear@1 160 void vorbis_info_clear(vorbis_info *vi){
nuclear@1 161 codec_setup_info *ci=vi->codec_setup;
nuclear@1 162 int i;
nuclear@1 163
nuclear@1 164 if(ci){
nuclear@1 165
nuclear@1 166 for(i=0;i<ci->modes;i++)
nuclear@1 167 if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
nuclear@1 168
nuclear@1 169 for(i=0;i<ci->maps;i++) /* unpack does the range checking */
nuclear@1 170 if(ci->map_param[i]) /* this may be cleaning up an aborted
nuclear@1 171 unpack, in which case the below type
nuclear@1 172 cannot be trusted */
nuclear@1 173 _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
nuclear@1 174
nuclear@1 175 for(i=0;i<ci->floors;i++) /* unpack does the range checking */
nuclear@1 176 if(ci->floor_param[i]) /* this may be cleaning up an aborted
nuclear@1 177 unpack, in which case the below type
nuclear@1 178 cannot be trusted */
nuclear@1 179 _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
nuclear@1 180
nuclear@1 181 for(i=0;i<ci->residues;i++) /* unpack does the range checking */
nuclear@1 182 if(ci->residue_param[i]) /* this may be cleaning up an aborted
nuclear@1 183 unpack, in which case the below type
nuclear@1 184 cannot be trusted */
nuclear@1 185 _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
nuclear@1 186
nuclear@1 187 for(i=0;i<ci->books;i++){
nuclear@1 188 if(ci->book_param[i]){
nuclear@1 189 /* knows if the book was not alloced */
nuclear@1 190 vorbis_staticbook_destroy(ci->book_param[i]);
nuclear@1 191 }
nuclear@1 192 if(ci->fullbooks)
nuclear@1 193 vorbis_book_clear(ci->fullbooks+i);
nuclear@1 194 }
nuclear@1 195 if(ci->fullbooks)
nuclear@1 196 _ogg_free(ci->fullbooks);
nuclear@1 197
nuclear@1 198 for(i=0;i<ci->psys;i++)
nuclear@1 199 _vi_psy_free(ci->psy_param[i]);
nuclear@1 200
nuclear@1 201 _ogg_free(ci);
nuclear@1 202 }
nuclear@1 203
nuclear@1 204 memset(vi,0,sizeof(*vi));
nuclear@1 205 }
nuclear@1 206
nuclear@1 207 /* Header packing/unpacking ********************************************/
nuclear@1 208
nuclear@1 209 static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
nuclear@1 210 codec_setup_info *ci=vi->codec_setup;
nuclear@1 211 if(!ci)return(OV_EFAULT);
nuclear@1 212
nuclear@1 213 vi->version=oggpack_read(opb,32);
nuclear@1 214 if(vi->version!=0)return(OV_EVERSION);
nuclear@1 215
nuclear@1 216 vi->channels=oggpack_read(opb,8);
nuclear@1 217 vi->rate=oggpack_read(opb,32);
nuclear@1 218
nuclear@1 219 vi->bitrate_upper=oggpack_read(opb,32);
nuclear@1 220 vi->bitrate_nominal=oggpack_read(opb,32);
nuclear@1 221 vi->bitrate_lower=oggpack_read(opb,32);
nuclear@1 222
nuclear@1 223 ci->blocksizes[0]=1<<oggpack_read(opb,4);
nuclear@1 224 ci->blocksizes[1]=1<<oggpack_read(opb,4);
nuclear@1 225
nuclear@1 226 if(vi->rate<1)goto err_out;
nuclear@1 227 if(vi->channels<1)goto err_out;
nuclear@1 228 if(ci->blocksizes[0]<64)goto err_out;
nuclear@1 229 if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
nuclear@1 230 if(ci->blocksizes[1]>8192)goto err_out;
nuclear@1 231
nuclear@1 232 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
nuclear@1 233
nuclear@1 234 return(0);
nuclear@1 235 err_out:
nuclear@1 236 vorbis_info_clear(vi);
nuclear@1 237 return(OV_EBADHEADER);
nuclear@1 238 }
nuclear@1 239
nuclear@1 240 static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
nuclear@1 241 int i;
nuclear@1 242 int vendorlen=oggpack_read(opb,32);
nuclear@1 243 if(vendorlen<0)goto err_out;
nuclear@1 244 if(vendorlen>opb->storage-8)goto err_out;
nuclear@1 245 vc->vendor=_ogg_calloc(vendorlen+1,1);
nuclear@1 246 _v_readstring(opb,vc->vendor,vendorlen);
nuclear@1 247 i=oggpack_read(opb,32);
nuclear@1 248 if(i<0)goto err_out;
nuclear@1 249 if(i>((opb->storage-oggpack_bytes(opb))>>2))goto err_out;
nuclear@1 250 vc->comments=i;
nuclear@1 251 vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
nuclear@1 252 vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
nuclear@1 253
nuclear@1 254 for(i=0;i<vc->comments;i++){
nuclear@1 255 int len=oggpack_read(opb,32);
nuclear@1 256 if(len<0)goto err_out;
nuclear@1 257 if(len>opb->storage-oggpack_bytes(opb))goto err_out;
nuclear@1 258 vc->comment_lengths[i]=len;
nuclear@1 259 vc->user_comments[i]=_ogg_calloc(len+1,1);
nuclear@1 260 _v_readstring(opb,vc->user_comments[i],len);
nuclear@1 261 }
nuclear@1 262 if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
nuclear@1 263
nuclear@1 264 return(0);
nuclear@1 265 err_out:
nuclear@1 266 vorbis_comment_clear(vc);
nuclear@1 267 return(OV_EBADHEADER);
nuclear@1 268 }
nuclear@1 269
nuclear@1 270 /* all of the real encoding details are here. The modes, books,
nuclear@1 271 everything */
nuclear@1 272 static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
nuclear@1 273 codec_setup_info *ci=vi->codec_setup;
nuclear@1 274 int i;
nuclear@1 275 if(!ci)return(OV_EFAULT);
nuclear@1 276
nuclear@1 277 /* codebooks */
nuclear@1 278 ci->books=oggpack_read(opb,8)+1;
nuclear@1 279 if(ci->books<=0)goto err_out;
nuclear@1 280 for(i=0;i<ci->books;i++){
nuclear@1 281 ci->book_param[i]=vorbis_staticbook_unpack(opb);
nuclear@1 282 if(!ci->book_param[i])goto err_out;
nuclear@1 283 }
nuclear@1 284
nuclear@1 285 /* time backend settings; hooks are unused */
nuclear@1 286 {
nuclear@1 287 int times=oggpack_read(opb,6)+1;
nuclear@1 288 if(times<=0)goto err_out;
nuclear@1 289 for(i=0;i<times;i++){
nuclear@1 290 int test=oggpack_read(opb,16);
nuclear@1 291 if(test<0 || test>=VI_TIMEB)goto err_out;
nuclear@1 292 }
nuclear@1 293 }
nuclear@1 294
nuclear@1 295 /* floor backend settings */
nuclear@1 296 ci->floors=oggpack_read(opb,6)+1;
nuclear@1 297 if(ci->floors<=0)goto err_out;
nuclear@1 298 for(i=0;i<ci->floors;i++){
nuclear@1 299 ci->floor_type[i]=oggpack_read(opb,16);
nuclear@1 300 if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
nuclear@1 301 ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
nuclear@1 302 if(!ci->floor_param[i])goto err_out;
nuclear@1 303 }
nuclear@1 304
nuclear@1 305 /* residue backend settings */
nuclear@1 306 ci->residues=oggpack_read(opb,6)+1;
nuclear@1 307 if(ci->residues<=0)goto err_out;
nuclear@1 308 for(i=0;i<ci->residues;i++){
nuclear@1 309 ci->residue_type[i]=oggpack_read(opb,16);
nuclear@1 310 if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
nuclear@1 311 ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
nuclear@1 312 if(!ci->residue_param[i])goto err_out;
nuclear@1 313 }
nuclear@1 314
nuclear@1 315 /* map backend settings */
nuclear@1 316 ci->maps=oggpack_read(opb,6)+1;
nuclear@1 317 if(ci->maps<=0)goto err_out;
nuclear@1 318 for(i=0;i<ci->maps;i++){
nuclear@1 319 ci->map_type[i]=oggpack_read(opb,16);
nuclear@1 320 if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
nuclear@1 321 ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
nuclear@1 322 if(!ci->map_param[i])goto err_out;
nuclear@1 323 }
nuclear@1 324
nuclear@1 325 /* mode settings */
nuclear@1 326 ci->modes=oggpack_read(opb,6)+1;
nuclear@1 327 if(ci->modes<=0)goto err_out;
nuclear@1 328 for(i=0;i<ci->modes;i++){
nuclear@1 329 ci->mode_param[i]=_ogg_calloc(1,sizeof(*ci->mode_param[i]));
nuclear@1 330 ci->mode_param[i]->blockflag=oggpack_read(opb,1);
nuclear@1 331 ci->mode_param[i]->windowtype=oggpack_read(opb,16);
nuclear@1 332 ci->mode_param[i]->transformtype=oggpack_read(opb,16);
nuclear@1 333 ci->mode_param[i]->mapping=oggpack_read(opb,8);
nuclear@1 334
nuclear@1 335 if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
nuclear@1 336 if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
nuclear@1 337 if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
nuclear@1 338 if(ci->mode_param[i]->mapping<0)goto err_out;
nuclear@1 339 }
nuclear@1 340
nuclear@1 341 if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
nuclear@1 342
nuclear@1 343 return(0);
nuclear@1 344 err_out:
nuclear@1 345 vorbis_info_clear(vi);
nuclear@1 346 return(OV_EBADHEADER);
nuclear@1 347 }
nuclear@1 348
nuclear@1 349 /* Is this packet a vorbis ID header? */
nuclear@1 350 int vorbis_synthesis_idheader(ogg_packet *op){
nuclear@1 351 oggpack_buffer opb;
nuclear@1 352 char buffer[6];
nuclear@1 353
nuclear@1 354 if(op){
nuclear@1 355 oggpack_readinit(&opb,op->packet,op->bytes);
nuclear@1 356
nuclear@1 357 if(!op->b_o_s)
nuclear@1 358 return(0); /* Not the initial packet */
nuclear@1 359
nuclear@1 360 if(oggpack_read(&opb,8) != 1)
nuclear@1 361 return 0; /* not an ID header */
nuclear@1 362
nuclear@1 363 memset(buffer,0,6);
nuclear@1 364 _v_readstring(&opb,buffer,6);
nuclear@1 365 if(memcmp(buffer,"vorbis",6))
nuclear@1 366 return 0; /* not vorbis */
nuclear@1 367
nuclear@1 368 return 1;
nuclear@1 369 }
nuclear@1 370
nuclear@1 371 return 0;
nuclear@1 372 }
nuclear@1 373
nuclear@1 374 /* The Vorbis header is in three packets; the initial small packet in
nuclear@1 375 the first page that identifies basic parameters, a second packet
nuclear@1 376 with bitstream comments and a third packet that holds the
nuclear@1 377 codebook. */
nuclear@1 378
nuclear@1 379 int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
nuclear@1 380 oggpack_buffer opb;
nuclear@1 381
nuclear@1 382 if(op){
nuclear@1 383 oggpack_readinit(&opb,op->packet,op->bytes);
nuclear@1 384
nuclear@1 385 /* Which of the three types of header is this? */
nuclear@1 386 /* Also verify header-ness, vorbis */
nuclear@1 387 {
nuclear@1 388 char buffer[6];
nuclear@1 389 int packtype=oggpack_read(&opb,8);
nuclear@1 390 memset(buffer,0,6);
nuclear@1 391 _v_readstring(&opb,buffer,6);
nuclear@1 392 if(memcmp(buffer,"vorbis",6)){
nuclear@1 393 /* not a vorbis header */
nuclear@1 394 return(OV_ENOTVORBIS);
nuclear@1 395 }
nuclear@1 396 switch(packtype){
nuclear@1 397 case 0x01: /* least significant *bit* is read first */
nuclear@1 398 if(!op->b_o_s){
nuclear@1 399 /* Not the initial packet */
nuclear@1 400 return(OV_EBADHEADER);
nuclear@1 401 }
nuclear@1 402 if(vi->rate!=0){
nuclear@1 403 /* previously initialized info header */
nuclear@1 404 return(OV_EBADHEADER);
nuclear@1 405 }
nuclear@1 406
nuclear@1 407 return(_vorbis_unpack_info(vi,&opb));
nuclear@1 408
nuclear@1 409 case 0x03: /* least significant *bit* is read first */
nuclear@1 410 if(vi->rate==0){
nuclear@1 411 /* um... we didn't get the initial header */
nuclear@1 412 return(OV_EBADHEADER);
nuclear@1 413 }
nuclear@1 414
nuclear@1 415 return(_vorbis_unpack_comment(vc,&opb));
nuclear@1 416
nuclear@1 417 case 0x05: /* least significant *bit* is read first */
nuclear@1 418 if(vi->rate==0 || vc->vendor==NULL){
nuclear@1 419 /* um... we didn;t get the initial header or comments yet */
nuclear@1 420 return(OV_EBADHEADER);
nuclear@1 421 }
nuclear@1 422
nuclear@1 423 return(_vorbis_unpack_books(vi,&opb));
nuclear@1 424
nuclear@1 425 default:
nuclear@1 426 /* Not a valid vorbis header type */
nuclear@1 427 return(OV_EBADHEADER);
nuclear@1 428 break;
nuclear@1 429 }
nuclear@1 430 }
nuclear@1 431 }
nuclear@1 432 return(OV_EBADHEADER);
nuclear@1 433 }
nuclear@1 434
nuclear@1 435 /* pack side **********************************************************/
nuclear@1 436
nuclear@1 437 static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){
nuclear@1 438 codec_setup_info *ci=vi->codec_setup;
nuclear@1 439 if(!ci)return(OV_EFAULT);
nuclear@1 440
nuclear@1 441 /* preamble */
nuclear@1 442 oggpack_write(opb,0x01,8);
nuclear@1 443 _v_writestring(opb,"vorbis", 6);
nuclear@1 444
nuclear@1 445 /* basic information about the stream */
nuclear@1 446 oggpack_write(opb,0x00,32);
nuclear@1 447 oggpack_write(opb,vi->channels,8);
nuclear@1 448 oggpack_write(opb,vi->rate,32);
nuclear@1 449
nuclear@1 450 oggpack_write(opb,vi->bitrate_upper,32);
nuclear@1 451 oggpack_write(opb,vi->bitrate_nominal,32);
nuclear@1 452 oggpack_write(opb,vi->bitrate_lower,32);
nuclear@1 453
nuclear@1 454 oggpack_write(opb,ilog2(ci->blocksizes[0]),4);
nuclear@1 455 oggpack_write(opb,ilog2(ci->blocksizes[1]),4);
nuclear@1 456 oggpack_write(opb,1,1);
nuclear@1 457
nuclear@1 458 return(0);
nuclear@1 459 }
nuclear@1 460
nuclear@1 461 static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){
nuclear@1 462 int bytes = strlen(ENCODE_VENDOR_STRING);
nuclear@1 463
nuclear@1 464 /* preamble */
nuclear@1 465 oggpack_write(opb,0x03,8);
nuclear@1 466 _v_writestring(opb,"vorbis", 6);
nuclear@1 467
nuclear@1 468 /* vendor */
nuclear@1 469 oggpack_write(opb,bytes,32);
nuclear@1 470 _v_writestring(opb,ENCODE_VENDOR_STRING, bytes);
nuclear@1 471
nuclear@1 472 /* comments */
nuclear@1 473
nuclear@1 474 oggpack_write(opb,vc->comments,32);
nuclear@1 475 if(vc->comments){
nuclear@1 476 int i;
nuclear@1 477 for(i=0;i<vc->comments;i++){
nuclear@1 478 if(vc->user_comments[i]){
nuclear@1 479 oggpack_write(opb,vc->comment_lengths[i],32);
nuclear@1 480 _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
nuclear@1 481 }else{
nuclear@1 482 oggpack_write(opb,0,32);
nuclear@1 483 }
nuclear@1 484 }
nuclear@1 485 }
nuclear@1 486 oggpack_write(opb,1,1);
nuclear@1 487
nuclear@1 488 return(0);
nuclear@1 489 }
nuclear@1 490
nuclear@1 491 static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){
nuclear@1 492 codec_setup_info *ci=vi->codec_setup;
nuclear@1 493 int i;
nuclear@1 494 if(!ci)return(OV_EFAULT);
nuclear@1 495
nuclear@1 496 oggpack_write(opb,0x05,8);
nuclear@1 497 _v_writestring(opb,"vorbis", 6);
nuclear@1 498
nuclear@1 499 /* books */
nuclear@1 500 oggpack_write(opb,ci->books-1,8);
nuclear@1 501 for(i=0;i<ci->books;i++)
nuclear@1 502 if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out;
nuclear@1 503
nuclear@1 504 /* times; hook placeholders */
nuclear@1 505 oggpack_write(opb,0,6);
nuclear@1 506 oggpack_write(opb,0,16);
nuclear@1 507
nuclear@1 508 /* floors */
nuclear@1 509 oggpack_write(opb,ci->floors-1,6);
nuclear@1 510 for(i=0;i<ci->floors;i++){
nuclear@1 511 oggpack_write(opb,ci->floor_type[i],16);
nuclear@1 512 if(_floor_P[ci->floor_type[i]]->pack)
nuclear@1 513 _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb);
nuclear@1 514 else
nuclear@1 515 goto err_out;
nuclear@1 516 }
nuclear@1 517
nuclear@1 518 /* residues */
nuclear@1 519 oggpack_write(opb,ci->residues-1,6);
nuclear@1 520 for(i=0;i<ci->residues;i++){
nuclear@1 521 oggpack_write(opb,ci->residue_type[i],16);
nuclear@1 522 _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb);
nuclear@1 523 }
nuclear@1 524
nuclear@1 525 /* maps */
nuclear@1 526 oggpack_write(opb,ci->maps-1,6);
nuclear@1 527 for(i=0;i<ci->maps;i++){
nuclear@1 528 oggpack_write(opb,ci->map_type[i],16);
nuclear@1 529 _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb);
nuclear@1 530 }
nuclear@1 531
nuclear@1 532 /* modes */
nuclear@1 533 oggpack_write(opb,ci->modes-1,6);
nuclear@1 534 for(i=0;i<ci->modes;i++){
nuclear@1 535 oggpack_write(opb,ci->mode_param[i]->blockflag,1);
nuclear@1 536 oggpack_write(opb,ci->mode_param[i]->windowtype,16);
nuclear@1 537 oggpack_write(opb,ci->mode_param[i]->transformtype,16);
nuclear@1 538 oggpack_write(opb,ci->mode_param[i]->mapping,8);
nuclear@1 539 }
nuclear@1 540 oggpack_write(opb,1,1);
nuclear@1 541
nuclear@1 542 return(0);
nuclear@1 543 err_out:
nuclear@1 544 return(-1);
nuclear@1 545 }
nuclear@1 546
nuclear@1 547 int vorbis_commentheader_out(vorbis_comment *vc,
nuclear@1 548 ogg_packet *op){
nuclear@1 549
nuclear@1 550 oggpack_buffer opb;
nuclear@1 551
nuclear@1 552 oggpack_writeinit(&opb);
nuclear@1 553 if(_vorbis_pack_comment(&opb,vc)){
nuclear@1 554 oggpack_writeclear(&opb);
nuclear@1 555 return OV_EIMPL;
nuclear@1 556 }
nuclear@1 557
nuclear@1 558 op->packet = _ogg_malloc(oggpack_bytes(&opb));
nuclear@1 559 memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));
nuclear@1 560
nuclear@1 561 op->bytes=oggpack_bytes(&opb);
nuclear@1 562 op->b_o_s=0;
nuclear@1 563 op->e_o_s=0;
nuclear@1 564 op->granulepos=0;
nuclear@1 565 op->packetno=1;
nuclear@1 566
nuclear@1 567 oggpack_writeclear(&opb);
nuclear@1 568 return 0;
nuclear@1 569 }
nuclear@1 570
nuclear@1 571 int vorbis_analysis_headerout(vorbis_dsp_state *v,
nuclear@1 572 vorbis_comment *vc,
nuclear@1 573 ogg_packet *op,
nuclear@1 574 ogg_packet *op_comm,
nuclear@1 575 ogg_packet *op_code){
nuclear@1 576 int ret=OV_EIMPL;
nuclear@1 577 vorbis_info *vi=v->vi;
nuclear@1 578 oggpack_buffer opb;
nuclear@1 579 private_state *b=v->backend_state;
nuclear@1 580
nuclear@1 581 if(!b){
nuclear@1 582 ret=OV_EFAULT;
nuclear@1 583 goto err_out;
nuclear@1 584 }
nuclear@1 585
nuclear@1 586 /* first header packet **********************************************/
nuclear@1 587
nuclear@1 588 oggpack_writeinit(&opb);
nuclear@1 589 if(_vorbis_pack_info(&opb,vi))goto err_out;
nuclear@1 590
nuclear@1 591 /* build the packet */
nuclear@1 592 if(b->header)_ogg_free(b->header);
nuclear@1 593 b->header=_ogg_malloc(oggpack_bytes(&opb));
nuclear@1 594 memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
nuclear@1 595 op->packet=b->header;
nuclear@1 596 op->bytes=oggpack_bytes(&opb);
nuclear@1 597 op->b_o_s=1;
nuclear@1 598 op->e_o_s=0;
nuclear@1 599 op->granulepos=0;
nuclear@1 600 op->packetno=0;
nuclear@1 601
nuclear@1 602 /* second header packet (comments) **********************************/
nuclear@1 603
nuclear@1 604 oggpack_reset(&opb);
nuclear@1 605 if(_vorbis_pack_comment(&opb,vc))goto err_out;
nuclear@1 606
nuclear@1 607 if(b->header1)_ogg_free(b->header1);
nuclear@1 608 b->header1=_ogg_malloc(oggpack_bytes(&opb));
nuclear@1 609 memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
nuclear@1 610 op_comm->packet=b->header1;
nuclear@1 611 op_comm->bytes=oggpack_bytes(&opb);
nuclear@1 612 op_comm->b_o_s=0;
nuclear@1 613 op_comm->e_o_s=0;
nuclear@1 614 op_comm->granulepos=0;
nuclear@1 615 op_comm->packetno=1;
nuclear@1 616
nuclear@1 617 /* third header packet (modes/codebooks) ****************************/
nuclear@1 618
nuclear@1 619 oggpack_reset(&opb);
nuclear@1 620 if(_vorbis_pack_books(&opb,vi))goto err_out;
nuclear@1 621
nuclear@1 622 if(b->header2)_ogg_free(b->header2);
nuclear@1 623 b->header2=_ogg_malloc(oggpack_bytes(&opb));
nuclear@1 624 memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
nuclear@1 625 op_code->packet=b->header2;
nuclear@1 626 op_code->bytes=oggpack_bytes(&opb);
nuclear@1 627 op_code->b_o_s=0;
nuclear@1 628 op_code->e_o_s=0;
nuclear@1 629 op_code->granulepos=0;
nuclear@1 630 op_code->packetno=2;
nuclear@1 631
nuclear@1 632 oggpack_writeclear(&opb);
nuclear@1 633 return(0);
nuclear@1 634 err_out:
nuclear@1 635 memset(op,0,sizeof(*op));
nuclear@1 636 memset(op_comm,0,sizeof(*op_comm));
nuclear@1 637 memset(op_code,0,sizeof(*op_code));
nuclear@1 638
nuclear@1 639 if(b){
nuclear@1 640 oggpack_writeclear(&opb);
nuclear@1 641 if(b->header)_ogg_free(b->header);
nuclear@1 642 if(b->header1)_ogg_free(b->header1);
nuclear@1 643 if(b->header2)_ogg_free(b->header2);
nuclear@1 644 b->header=NULL;
nuclear@1 645 b->header1=NULL;
nuclear@1 646 b->header2=NULL;
nuclear@1 647 }
nuclear@1 648 return(ret);
nuclear@1 649 }
nuclear@1 650
nuclear@1 651 double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){
nuclear@1 652 if(granulepos == -1) return -1;
nuclear@1 653
nuclear@1 654 /* We're not guaranteed a 64 bit unsigned type everywhere, so we
nuclear@1 655 have to put the unsigned granpo in a signed type. */
nuclear@1 656 if(granulepos>=0){
nuclear@1 657 return((double)granulepos/v->vi->rate);
nuclear@1 658 }else{
nuclear@1 659 ogg_int64_t granuleoff=0xffffffff;
nuclear@1 660 granuleoff<<=31;
nuclear@1 661 granuleoff|=0x7ffffffff;
nuclear@1 662 return(((double)granulepos+2+granuleoff+granuleoff)/v->vi->rate);
nuclear@1 663 }
nuclear@1 664 }
nuclear@1 665
nuclear@1 666 const char *vorbis_version_string(void){
nuclear@1 667 return GENERAL_VENDOR_STRING;
nuclear@1 668 }