| [ Index ] |
PHP Cross Reference of Drupal 6 (yi-drupal) |
[Summary view] [Print] [Text view]
1 <?php 2 ///////////////////////////////////////////////////////////////// 3 /// getID3() by James Heinrich <info@getid3.org> // 4 // available at http://getid3.sourceforge.net // 5 // or http://www.getid3.org // 6 ///////////////////////////////////////////////////////////////// 7 // See readme.txt for more details // 8 ///////////////////////////////////////////////////////////////// 9 // // 10 // module.audio.ogg.php // 11 // module for analyzing Ogg Vorbis, OggFLAC and Speex files // 12 // dependencies: module.audio.flac.php // 13 // /// 14 ///////////////////////////////////////////////////////////////// 15 16 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true); 17 18 class getid3_ogg 19 { 20 21 function getid3_ogg(&$fd, &$ThisFileInfo) { 22 23 $ThisFileInfo['fileformat'] = 'ogg'; 24 25 // Warn about illegal tags - only vorbiscomments are allowed 26 if (isset($ThisFileInfo['id3v2'])) { 27 $ThisFileInfo['warning'][] = 'Illegal ID3v2 tag present.'; 28 } 29 if (isset($ThisFileInfo['id3v1'])) { 30 $ThisFileInfo['warning'][] = 'Illegal ID3v1 tag present.'; 31 } 32 if (isset($ThisFileInfo['ape'])) { 33 $ThisFileInfo['warning'][] = 'Illegal APE tag present.'; 34 } 35 36 37 // Page 1 - Stream Header 38 39 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); 40 41 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 42 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 43 44 if (ftell($fd) >= GETID3_FREAD_BUFFER_SIZE) { 45 $ThisFileInfo['error'][] = 'Could not find start of Ogg page in the first '.GETID3_FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg-Vorbis file?)'; 46 unset($ThisFileInfo['fileformat']); 47 unset($ThisFileInfo['ogg']); 48 return false; 49 } 50 51 $filedata = fread($fd, $oggpageinfo['page_length']); 52 $filedataoffset = 0; 53 54 if (substr($filedata, 0, 4) == 'fLaC') { 55 56 $ThisFileInfo['audio']['dataformat'] = 'flac'; 57 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; 58 $ThisFileInfo['audio']['lossless'] = true; 59 60 } elseif (substr($filedata, 1, 6) == 'vorbis') { 61 62 $this->ParseVorbisPageHeader($filedata, $filedataoffset, $ThisFileInfo, $oggpageinfo); 63 64 } elseif (substr($filedata, 0, 8) == 'Speex ') { 65 66 // http://www.speex.org/manual/node10.html 67 68 $ThisFileInfo['audio']['dataformat'] = 'speex'; 69 $ThisFileInfo['mime_type'] = 'audio/speex'; 70 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 71 $ThisFileInfo['audio']['lossless'] = false; 72 73 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' 74 $filedataoffset += 8; 75 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); 76 $filedataoffset += 20; 77 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 78 $filedataoffset += 4; 79 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 80 $filedataoffset += 4; 81 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 82 $filedataoffset += 4; 83 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 84 $filedataoffset += 4; 85 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 86 $filedataoffset += 4; 87 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 88 $filedataoffset += 4; 89 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 90 $filedataoffset += 4; 91 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 92 $filedataoffset += 4; 93 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 94 $filedataoffset += 4; 95 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 96 $filedataoffset += 4; 97 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 98 $filedataoffset += 4; 99 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 100 $filedataoffset += 4; 101 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 102 $filedataoffset += 4; 103 104 $ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); 105 $ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; 106 $ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; 107 $ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; 108 $ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); 109 110 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate']; 111 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels']; 112 if ($ThisFileInfo['speex']['vbr']) { 113 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; 114 } 115 116 } else { 117 118 $ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither'; 119 unset($ThisFileInfo['ogg']); 120 unset($ThisFileInfo['mime_type']); 121 return false; 122 123 } 124 125 126 // Page 2 - Comment Header 127 128 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 129 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 130 131 switch ($ThisFileInfo['audio']['dataformat']) { 132 133 case 'vorbis': 134 $filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 135 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); 136 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' 137 138 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); 139 break; 140 141 case 'flac': 142 if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) { 143 $ThisFileInfo['error'][] = 'Failed to parse FLAC headers'; 144 return false; 145 } 146 break; 147 148 case 'speex': 149 fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); 150 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); 151 break; 152 153 } 154 155 156 157 // Last Page - Number of Samples 158 159 if ($ThisFileInfo['avdataend'] >= pow(2, 31)) { 160 161 $ThisFileInfo['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond 2GB)'; 162 163 } else { 164 165 fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET); 166 $LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE)); 167 if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { 168 fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET); 169 $ThisFileInfo['avdataend'] = ftell($fd); 170 $ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd); 171 $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position']; 172 if ($ThisFileInfo['ogg']['samples'] == 0) { 173 $ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; 174 return false; 175 } 176 $ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']); 177 } 178 179 } 180 181 if (!empty($ThisFileInfo['ogg']['bitrate_average'])) { 182 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average']; 183 } elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) { 184 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal']; 185 } elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) { 186 $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2; 187 } 188 if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) { 189 if ($ThisFileInfo['audio']['bitrate'] == 0) { 190 $ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; 191 return false; 192 } 193 $ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']); 194 } 195 196 if (isset($ThisFileInfo['ogg']['vendor'])) { 197 $ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']); 198 199 // Vorbis only 200 if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') { 201 202 // Vorbis 1.0 starts with Xiph.Org 203 if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) { 204 205 if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') { 206 207 // Set -b 128 on abr files 208 $ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000); 209 210 } elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) { 211 // Set -q N on vbr files 212 $ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']); 213 214 } 215 } 216 217 if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) { 218 $ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps'; 219 } 220 } 221 } 222 223 return true; 224 } 225 226 function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$ThisFileInfo, &$oggpageinfo) { 227 $ThisFileInfo['audio']['dataformat'] = 'vorbis'; 228 $ThisFileInfo['audio']['lossless'] = false; 229 230 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 231 $filedataoffset += 1; 232 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' 233 $filedataoffset += 6; 234 $ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 235 $filedataoffset += 4; 236 $ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 237 $filedataoffset += 1; 238 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels']; 239 $ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 240 $filedataoffset += 4; 241 if ($ThisFileInfo['ogg']['samplerate'] == 0) { 242 $ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero'; 243 return false; 244 } 245 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate']; 246 $ThisFileInfo['ogg']['samples'] = 0; // filled in later 247 $ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later 248 $ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 249 $filedataoffset += 4; 250 $ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 251 $filedataoffset += 4; 252 $ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 253 $filedataoffset += 4; 254 $ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); 255 $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); 256 $ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet 257 258 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr 259 if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) { 260 unset($ThisFileInfo['ogg']['bitrate_max']); 261 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 262 } 263 if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { 264 unset($ThisFileInfo['ogg']['bitrate_nominal']); 265 } 266 if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) { 267 unset($ThisFileInfo['ogg']['bitrate_min']); 268 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 269 } 270 return true; 271 } 272 273 function ParseOggPageHeader(&$fd) { 274 // http://xiph.org/ogg/vorbis/doc/framing.html 275 $oggheader['page_start_offset'] = ftell($fd); // where we started from in the file 276 277 $filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE); 278 $filedataoffset = 0; 279 while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { 280 if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) { 281 // should be found before here 282 return false; 283 } 284 if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { 285 if (feof($fd) || (($filedata .= fread($fd, GETID3_FREAD_BUFFER_SIZE)) === false)) { 286 // get some more data, unless eof, in which case fail 287 return false; 288 } 289 } 290 } 291 $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' 292 293 $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 294 $filedataoffset += 1; 295 $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 296 $filedataoffset += 1; 297 $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet 298 $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) 299 $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos) 300 301 $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); 302 $filedataoffset += 8; 303 $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 304 $filedataoffset += 4; 305 $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 306 $filedataoffset += 4; 307 $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 308 $filedataoffset += 4; 309 $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 310 $filedataoffset += 1; 311 $oggheader['page_length'] = 0; 312 for ($i = 0; $i < $oggheader['page_segments']; $i++) { 313 $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 314 $filedataoffset += 1; 315 $oggheader['page_length'] += $oggheader['segment_table'][$i]; 316 } 317 $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset; 318 $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length']; 319 fseek($fd, $oggheader['header_end_offset'], SEEK_SET); 320 321 return $oggheader; 322 } 323 324 325 function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) { 326 327 $OriginalOffset = ftell($fd); 328 $CommentStartOffset = $OriginalOffset; 329 $commentdataoffset = 0; 330 $VorbisCommentPage = 1; 331 332 switch ($ThisFileInfo['audio']['dataformat']) { 333 case 'vorbis': 334 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block 335 fseek($fd, $CommentStartOffset, SEEK_SET); 336 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; 337 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); 338 339 $commentdataoffset += (strlen('vorbis') + 1); 340 break; 341 342 case 'flac': 343 fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET); 344 $commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']); 345 break; 346 347 case 'speex': 348 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block 349 fseek($fd, $CommentStartOffset, SEEK_SET); 350 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; 351 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); 352 break; 353 354 default: 355 return false; 356 break; 357 } 358 359 $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 360 $commentdataoffset += 4; 361 362 $ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); 363 $commentdataoffset += $VendorSize; 364 365 $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 366 $commentdataoffset += 4; 367 $ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset; 368 369 $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); 370 for ($i = 0; $i < $CommentsCount; $i++) { 371 372 $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; 373 374 if (ftell($fd) < ($ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4)) { 375 $VorbisCommentPage++; 376 377 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 378 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 379 380 // First, save what we haven't read yet 381 $AsYetUnusedData = substr($commentdata, $commentdataoffset); 382 383 // Then take that data off the end 384 $commentdata = substr($commentdata, 0, $commentdataoffset); 385 386 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct 387 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 388 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 389 390 // Finally, stick the unused data back on the end 391 $commentdata .= $AsYetUnusedData; 392 393 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 394 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); 395 396 } 397 $ThisFileInfo['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 398 399 // replace avdataoffset with position just after the last vorbiscomment 400 $ThisFileInfo['avdataoffset'] = $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + $ThisFileInfo['ogg']['comments_raw'][$i]['size'] + 4; 401 402 $commentdataoffset += 4; 403 while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo['ogg']['comments_raw'][$i]['size']) { 404 if (($ThisFileInfo['ogg']['comments_raw'][$i]['size'] > $ThisFileInfo['avdataend']) || ($ThisFileInfo['ogg']['comments_raw'][$i]['size'] < 0)) { 405 $ThisFileInfo['error'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments'; 406 break 2; 407 } 408 409 $VorbisCommentPage++; 410 411 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 412 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 413 414 // First, save what we haven't read yet 415 $AsYetUnusedData = substr($commentdata, $commentdataoffset); 416 417 // Then take that data off the end 418 $commentdata = substr($commentdata, 0, $commentdataoffset); 419 420 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct 421 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 422 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 423 424 // Finally, stick the unused data back on the end 425 $commentdata .= $AsYetUnusedData; 426 427 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 428 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); 429 430 //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; 431 } 432 $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo['ogg']['comments_raw'][$i]['size']); 433 $commentdataoffset += $ThisFileInfo['ogg']['comments_raw'][$i]['size']; 434 435 if (!$commentstring) { 436 437 // no comment? 438 $ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$i.']'; 439 440 } elseif (strstr($commentstring, '=')) { 441 442 $commentexploded = explode('=', $commentstring, 2); 443 $ThisFileInfo['ogg']['comments_raw'][$i]['key'] = strtoupper($commentexploded[0]); 444 $ThisFileInfo['ogg']['comments_raw'][$i]['value'] = @$commentexploded[1]; 445 $ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']); 446 447 $ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value']; 448 449 $imageinfo = array(); 450 $imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data'], $imageinfo); 451 $ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] = getid3_lib::image_type_to_mime_type($imagechunkcheck[2]); 452 if (!$ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] || ($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] == 'application/octet-stream')) { 453 unset($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime']); 454 unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']); 455 } 456 457 } else { 458 459 $ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; 460 461 } 462 } 463 464 465 // Replay Gain Adjustment 466 // http://privatewww.essex.ac.uk/~djmrob/replaygain/ 467 if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) { 468 foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) { 469 switch ($index) { 470 case 'rg_audiophile': 471 case 'replaygain_album_gain': 472 $ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0]; 473 unset($ThisFileInfo['ogg']['comments'][$index]); 474 break; 475 476 case 'rg_radio': 477 case 'replaygain_track_gain': 478 $ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0]; 479 unset($ThisFileInfo['ogg']['comments'][$index]); 480 break; 481 482 case 'replaygain_album_peak': 483 $ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0]; 484 unset($ThisFileInfo['ogg']['comments'][$index]); 485 break; 486 487 case 'rg_peak': 488 case 'replaygain_track_peak': 489 $ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0]; 490 unset($ThisFileInfo['ogg']['comments'][$index]); 491 break; 492 493 494 default: 495 // do nothing 496 break; 497 } 498 } 499 } 500 501 fseek($fd, $OriginalOffset, SEEK_SET); 502 503 return true; 504 } 505 506 function SpeexBandModeLookup($mode) { 507 static $SpeexBandModeLookup = array(); 508 if (empty($SpeexBandModeLookup)) { 509 $SpeexBandModeLookup[0] = 'narrow'; 510 $SpeexBandModeLookup[1] = 'wide'; 511 $SpeexBandModeLookup[2] = 'ultra-wide'; 512 } 513 return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); 514 } 515 516 517 function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) { 518 for ($i = 0; $i < $SegmentNumber; $i++) { 519 $segmentlength = 0; 520 foreach ($OggInfoArray['segment_table'] as $key => $value) { 521 $segmentlength += $value; 522 if ($value < 255) { 523 break; 524 } 525 } 526 } 527 return $segmentlength; 528 } 529 530 531 function get_quality_from_nominal_bitrate($nominal_bitrate) { 532 533 // decrease precision 534 $nominal_bitrate = $nominal_bitrate / 1000; 535 536 if ($nominal_bitrate < 128) { 537 // q-1 to q4 538 $qval = ($nominal_bitrate - 64) / 16; 539 } elseif ($nominal_bitrate < 256) { 540 // q4 to q8 541 $qval = $nominal_bitrate / 32; 542 } elseif ($nominal_bitrate < 320) { 543 // q8 to q9 544 $qval = ($nominal_bitrate + 256) / 64; 545 } else { 546 // q9 to q10 547 $qval = ($nominal_bitrate + 1300) / 180; 548 } 549 //return $qval; // 5.031324 550 //return intval($qval); // 5 551 return round($qval, 1); // 5 or 4.9 552 } 553 554 } 555 556 ?>
title
Description
Body
title
Description
Body
title
Description
Body
title
Body
| Generated: Mon Jul 9 18:01:44 2012 | Cross-referenced by PHPXref 0.7 |