Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 1 | /************************************************************************ |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 2 | * Copyright (C) 2002-2009, Xiph.org Foundation |
| 3 | * Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 16 | * * Neither the names of the Xiph.org Foundation nor Pinknoise |
| 17 | * Productions Ltd nor the names of its contributors may be used to |
| 18 | * endorse or promote products derived from this software without |
| 19 | * specific prior written permission. |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | ************************************************************************ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 33 | |
| 34 | function: maintain the info structure, info <-> header packets |
| 35 | |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 36 | ************************************************************************/ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 37 | |
| 38 | /* general handling of the header and the vorbis_info structure (and |
| 39 | substructures) */ |
| 40 | |
| 41 | #include <stdlib.h> |
| 42 | #include <string.h> |
| 43 | #include <ctype.h> |
| 44 | #include "ogg.h" |
| 45 | #include "ivorbiscodec.h" |
| 46 | #include "codec_internal.h" |
| 47 | #include "codebook.h" |
| 48 | #include "misc.h" |
| 49 | #include "os.h" |
| 50 | |
| 51 | /* helpers */ |
| 52 | static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){ |
| 53 | while(bytes--){ |
| 54 | *buf++=(char)oggpack_read(o,8); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | void vorbis_comment_init(vorbis_comment *vc){ |
| 59 | memset(vc,0,sizeof(*vc)); |
| 60 | } |
| 61 | |
| 62 | /* This is more or less the same as strncasecmp - but that doesn't exist |
| 63 | * everywhere, and this is a fairly trivial function, so we include it */ |
| 64 | static int tagcompare(const char *s1, const char *s2, int n){ |
| 65 | int c=0; |
| 66 | while(c < n){ |
| 67 | if(toupper(s1[c]) != toupper(s2[c])) |
| 68 | return !0; |
| 69 | c++; |
| 70 | } |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | char *vorbis_comment_query(vorbis_comment *vc, char *tag, int count){ |
| 75 | long i; |
| 76 | int found = 0; |
| 77 | int taglen = strlen(tag)+1; /* +1 for the = we append */ |
| 78 | char *fulltag = (char *)alloca(taglen+ 1); |
| 79 | |
| 80 | strcpy(fulltag, tag); |
| 81 | strcat(fulltag, "="); |
| 82 | |
| 83 | for(i=0;i<vc->comments;i++){ |
| 84 | if(!tagcompare(vc->user_comments[i], fulltag, taglen)){ |
| 85 | if(count == found) |
| 86 | /* We return a pointer to the data, not a copy */ |
| 87 | return vc->user_comments[i] + taglen; |
| 88 | else |
| 89 | found++; |
| 90 | } |
| 91 | } |
| 92 | return NULL; /* didn't find anything */ |
| 93 | } |
| 94 | |
| 95 | int vorbis_comment_query_count(vorbis_comment *vc, char *tag){ |
| 96 | int i,count=0; |
| 97 | int taglen = strlen(tag)+1; /* +1 for the = we append */ |
| 98 | char *fulltag = (char *)alloca(taglen+1); |
| 99 | strcpy(fulltag,tag); |
| 100 | strcat(fulltag, "="); |
| 101 | |
| 102 | for(i=0;i<vc->comments;i++){ |
| 103 | if(!tagcompare(vc->user_comments[i], fulltag, taglen)) |
| 104 | count++; |
| 105 | } |
| 106 | |
| 107 | return count; |
| 108 | } |
| 109 | |
| 110 | void vorbis_comment_clear(vorbis_comment *vc){ |
| 111 | if(vc){ |
| 112 | long i; |
| 113 | for(i=0;i<vc->comments;i++) |
| 114 | if(vc->user_comments[i])_ogg_free(vc->user_comments[i]); |
| 115 | if(vc->user_comments)_ogg_free(vc->user_comments); |
| 116 | if(vc->comment_lengths)_ogg_free(vc->comment_lengths); |
| 117 | if(vc->vendor)_ogg_free(vc->vendor); |
| 118 | } |
| 119 | memset(vc,0,sizeof(*vc)); |
| 120 | } |
| 121 | |
| 122 | /* blocksize 0 is guaranteed to be short, 1 is guarantted to be long. |
| 123 | They may be equal, but short will never ge greater than long */ |
| 124 | int vorbis_info_blocksize(vorbis_info *vi,int zo){ |
| 125 | codec_setup_info *ci = (codec_setup_info *)vi->codec_setup; |
| 126 | return ci ? ci->blocksizes[zo] : -1; |
| 127 | } |
| 128 | |
| 129 | /* used by synthesis, which has a full, alloced vi */ |
| 130 | void vorbis_info_init(vorbis_info *vi){ |
| 131 | memset(vi,0,sizeof(*vi)); |
| 132 | vi->codec_setup=(codec_setup_info *)_ogg_calloc(1,sizeof(codec_setup_info)); |
| 133 | } |
| 134 | |
| 135 | void vorbis_info_clear(vorbis_info *vi){ |
| 136 | codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
| 137 | int i; |
| 138 | |
| 139 | if(ci){ |
| 140 | |
| 141 | if(ci->mode_param)_ogg_free(ci->mode_param); |
| 142 | |
| 143 | if(ci->map_param){ |
| 144 | for(i=0;i<ci->maps;i++) /* unpack does the range checking */ |
| 145 | mapping_clear_info(ci->map_param+i); |
| 146 | _ogg_free(ci->map_param); |
| 147 | } |
| 148 | |
| 149 | if(ci->floor_param){ |
| 150 | for(i=0;i<ci->floors;i++) /* unpack does the range checking */ |
| 151 | if(ci->floor_type[i]) |
| 152 | floor1_free_info(ci->floor_param[i]); |
| 153 | else |
| 154 | floor0_free_info(ci->floor_param[i]); |
| 155 | _ogg_free(ci->floor_param); |
| 156 | _ogg_free(ci->floor_type); |
| 157 | } |
| 158 | |
| 159 | if(ci->residue_param){ |
| 160 | for(i=0;i<ci->residues;i++) /* unpack does the range checking */ |
| 161 | res_clear_info(ci->residue_param+i); |
| 162 | _ogg_free(ci->residue_param); |
| 163 | } |
| 164 | |
| 165 | if(ci->book_param){ |
| 166 | for(i=0;i<ci->books;i++) |
| 167 | vorbis_book_clear(ci->book_param+i); |
| 168 | _ogg_free(ci->book_param); |
| 169 | } |
| 170 | |
| 171 | _ogg_free(ci); |
| 172 | } |
| 173 | |
| 174 | memset(vi,0,sizeof(*vi)); |
| 175 | } |
| 176 | |
| 177 | /* Header packing/unpacking ********************************************/ |
| 178 | |
Andreas Huber | 1a7ca64 | 2010-05-07 10:37:02 -0700 | [diff] [blame] | 179 | int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 180 | codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
| 181 | if(!ci)return(OV_EFAULT); |
| 182 | |
| 183 | vi->version=oggpack_read(opb,32); |
| 184 | if(vi->version!=0)return(OV_EVERSION); |
| 185 | |
| 186 | vi->channels=oggpack_read(opb,8); |
| 187 | vi->rate=oggpack_read(opb,32); |
| 188 | |
| 189 | vi->bitrate_upper=oggpack_read(opb,32); |
| 190 | vi->bitrate_nominal=oggpack_read(opb,32); |
| 191 | vi->bitrate_lower=oggpack_read(opb,32); |
| 192 | |
| 193 | ci->blocksizes[0]=1<<oggpack_read(opb,4); |
| 194 | ci->blocksizes[1]=1<<oggpack_read(opb,4); |
| 195 | |
| 196 | #ifdef LIMIT_TO_64kHz |
| 197 | if(vi->rate>=64000 || ci->blocksizes[1]>4096)goto err_out; |
| 198 | #else |
| 199 | if(vi->rate<64000 && ci->blocksizes[1]>4096)goto err_out; |
| 200 | #endif |
| 201 | |
| 202 | if(vi->rate<1)goto err_out; |
| 203 | if(vi->channels<1)goto err_out; |
| 204 | if(ci->blocksizes[0]<64)goto err_out; |
| 205 | if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out; |
| 206 | if(ci->blocksizes[1]>8192)goto err_out; |
| 207 | |
| 208 | if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */ |
| 209 | |
| 210 | return(0); |
| 211 | err_out: |
| 212 | vorbis_info_clear(vi); |
| 213 | return(OV_EBADHEADER); |
| 214 | } |
| 215 | |
Andreas Huber | 1a7ca64 | 2010-05-07 10:37:02 -0700 | [diff] [blame] | 216 | int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 217 | int i; |
| 218 | int vendorlen=oggpack_read(opb,32); |
| 219 | if(vendorlen<0)goto err_out; |
| 220 | vc->vendor=(char *)_ogg_calloc(vendorlen+1,1); |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 221 | if(!vc->vendor)goto err_out; |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 222 | _v_readstring(opb,vc->vendor,vendorlen); |
| 223 | vc->comments=oggpack_read(opb,32); |
| 224 | if(vc->comments<0)goto err_out; |
| 225 | vc->user_comments=(char **)_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments)); |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 226 | if (!vc->user_comments){ |
| 227 | vc->comments=0; |
| 228 | goto err_out; |
| 229 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 230 | vc->comment_lengths=(int *)_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths)); |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 231 | if (!vc->comment_lengths)goto err_out; |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 232 | |
| 233 | for(i=0;i<vc->comments;i++){ |
| 234 | int len=oggpack_read(opb,32); |
| 235 | if(len<0)goto err_out; |
| 236 | vc->comment_lengths[i]=len; |
| 237 | vc->user_comments[i]=(char *)_ogg_calloc(len+1,1); |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 238 | if(!vc->user_comments[i])goto err_out; |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 239 | _v_readstring(opb,vc->user_comments[i],len); |
| 240 | } |
| 241 | if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */ |
| 242 | |
| 243 | return(0); |
| 244 | err_out: |
| 245 | vorbis_comment_clear(vc); |
| 246 | return(OV_EBADHEADER); |
| 247 | } |
| 248 | |
| 249 | /* all of the real encoding details are here. The modes, books, |
| 250 | everything */ |
Andreas Huber | 1a7ca64 | 2010-05-07 10:37:02 -0700 | [diff] [blame] | 251 | int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 252 | codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
| 253 | int i; |
| 254 | if(!ci)return(OV_EFAULT); |
| 255 | |
| 256 | /* codebooks */ |
| 257 | ci->books=oggpack_read(opb,8)+1; |
| 258 | ci->book_param=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->book_param)); |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 259 | if(!ci->book_param){ |
| 260 | ci->books=0; |
| 261 | goto err_out; |
| 262 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 263 | for(i=0;i<ci->books;i++) |
| 264 | if(vorbis_book_unpack(opb,ci->book_param+i))goto err_out; |
| 265 | |
| 266 | /* time backend settings, not actually used */ |
| 267 | i=oggpack_read(opb,6); |
| 268 | for(;i>=0;i--) |
| 269 | if(oggpack_read(opb,16)!=0)goto err_out; |
| 270 | |
| 271 | /* floor backend settings */ |
| 272 | ci->floors=oggpack_read(opb,6)+1; |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 273 | ci->floor_param=_ogg_calloc(ci->floors, sizeof(*ci->floor_param)); |
| 274 | ci->floor_type=_ogg_calloc(ci->floors, sizeof(*ci->floor_type)); |
| 275 | if(!ci->floor_param || !ci->floor_type){ |
| 276 | ci->floors=0; |
| 277 | goto err_out; |
| 278 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 279 | for(i=0;i<ci->floors;i++){ |
| 280 | ci->floor_type[i]=(char)oggpack_read(opb,16); |
| 281 | if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out; |
| 282 | if(ci->floor_type[i]) |
| 283 | ci->floor_param[i]=floor1_info_unpack(vi,opb); |
| 284 | else |
| 285 | ci->floor_param[i]=floor0_info_unpack(vi,opb); |
| 286 | if(!ci->floor_param[i])goto err_out; |
| 287 | } |
| 288 | |
| 289 | /* residue backend settings */ |
| 290 | ci->residues=oggpack_read(opb,6)+1; |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 291 | ci->residue_param=_ogg_calloc(ci->residues, sizeof(*ci->residue_param)); |
| 292 | if (!ci->residue_param){ |
| 293 | ci->residues=0; |
| 294 | goto err_out; |
| 295 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 296 | for(i=0;i<ci->residues;i++) |
| 297 | if(res_unpack(ci->residue_param+i,vi,opb))goto err_out; |
| 298 | |
| 299 | /* map backend settings */ |
| 300 | ci->maps=oggpack_read(opb,6)+1; |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 301 | ci->map_param=_ogg_calloc(ci->maps, sizeof(*ci->map_param)); |
| 302 | if (!ci->map_param){ |
| 303 | ci->maps=0; |
| 304 | goto err_out; |
| 305 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 306 | for(i=0;i<ci->maps;i++){ |
| 307 | if(oggpack_read(opb,16)!=0)goto err_out; |
| 308 | if(mapping_info_unpack(ci->map_param+i,vi,opb))goto err_out; |
| 309 | } |
| 310 | |
| 311 | /* mode settings */ |
| 312 | ci->modes=oggpack_read(opb,6)+1; |
| 313 | ci->mode_param= |
Marco Nelissen | afa1f6b | 2013-10-11 15:46:30 -0700 | [diff] [blame^] | 314 | (vorbis_info_mode *)_ogg_calloc(ci->modes, sizeof(*ci->mode_param)); |
| 315 | if (!ci->mode_param){ |
| 316 | ci->modes=0; |
| 317 | goto err_out; |
| 318 | } |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 319 | for(i=0;i<ci->modes;i++){ |
| 320 | ci->mode_param[i].blockflag=(unsigned char)oggpack_read(opb,1); |
| 321 | if(oggpack_read(opb,16))goto err_out; |
| 322 | if(oggpack_read(opb,16))goto err_out; |
| 323 | ci->mode_param[i].mapping=(unsigned char)oggpack_read(opb,8); |
| 324 | if(ci->mode_param[i].mapping>=ci->maps)goto err_out; |
| 325 | } |
| 326 | |
| 327 | if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */ |
| 328 | |
| 329 | return(0); |
| 330 | err_out: |
| 331 | vorbis_info_clear(vi); |
| 332 | return(OV_EBADHEADER); |
| 333 | } |
| 334 | |
| 335 | /* The Vorbis header is in three packets; the initial small packet in |
| 336 | the first page that identifies basic parameters, a second packet |
| 337 | with bitstream comments and a third packet that holds the |
| 338 | codebook. */ |
| 339 | |
| 340 | int vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){ |
| 341 | oggpack_buffer opb; |
| 342 | |
| 343 | if(op){ |
| 344 | oggpack_readinit(&opb,op->packet); |
| 345 | |
| 346 | /* Which of the three types of header is this? */ |
| 347 | /* Also verify header-ness, vorbis */ |
| 348 | { |
| 349 | char buffer[6]; |
| 350 | int packtype=oggpack_read(&opb,8); |
| 351 | memset(buffer,0,6); |
| 352 | _v_readstring(&opb,buffer,6); |
| 353 | if(memcmp(buffer,"vorbis",6)){ |
| 354 | /* not a vorbis header */ |
| 355 | return(OV_ENOTVORBIS); |
| 356 | } |
| 357 | switch(packtype){ |
| 358 | case 0x01: /* least significant *bit* is read first */ |
| 359 | if(!op->b_o_s){ |
| 360 | /* Not the initial packet */ |
| 361 | return(OV_EBADHEADER); |
| 362 | } |
| 363 | if(vi->rate!=0){ |
| 364 | /* previously initialized info header */ |
| 365 | return(OV_EBADHEADER); |
| 366 | } |
| 367 | |
| 368 | return(_vorbis_unpack_info(vi,&opb)); |
| 369 | |
| 370 | case 0x03: /* least significant *bit* is read first */ |
| 371 | if(vi->rate==0){ |
| 372 | /* um... we didn't get the initial header */ |
| 373 | return(OV_EBADHEADER); |
| 374 | } |
| 375 | |
| 376 | return(_vorbis_unpack_comment(vc,&opb)); |
| 377 | |
| 378 | case 0x05: /* least significant *bit* is read first */ |
| 379 | if(vi->rate==0 || vc->vendor==NULL){ |
| 380 | /* um... we didn;t get the initial header or comments yet */ |
| 381 | return(OV_EBADHEADER); |
| 382 | } |
| 383 | |
| 384 | return(_vorbis_unpack_books(vi,&opb)); |
| 385 | |
| 386 | default: |
| 387 | /* Not a valid vorbis header type */ |
| 388 | return(OV_EBADHEADER); |
| 389 | break; |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | return(OV_EBADHEADER); |
| 394 | } |
| 395 | |