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Code source de LifeType 1.2.4 |
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 $ThisFileInfo['audio']['dataformat'] = 'vorbis'; 63 $ThisFileInfo['audio']['lossless'] = false; 64 65 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 66 $filedataoffset += 1; 67 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' 68 $filedataoffset += 6; 69 $ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 70 $filedataoffset += 4; 71 $ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 72 $filedataoffset += 1; 73 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels']; 74 $ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 75 $filedataoffset += 4; 76 if ($ThisFileInfo['ogg']['samplerate'] == 0) { 77 $ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero'; 78 return false; 79 } 80 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate']; 81 $ThisFileInfo['ogg']['samples'] = 0; // filled in later 82 $ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later 83 $ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 84 $filedataoffset += 4; 85 $ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 86 $filedataoffset += 4; 87 $ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 88 $filedataoffset += 4; 89 $ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); 90 $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); 91 $ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet 92 93 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr 94 if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) { 95 unset($ThisFileInfo['ogg']['bitrate_max']); 96 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 97 } 98 if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { 99 unset($ThisFileInfo['ogg']['bitrate_nominal']); 100 } 101 if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) { 102 unset($ThisFileInfo['ogg']['bitrate_min']); 103 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 104 } 105 106 } elseif (substr($filedata, 0, 8) == 'Speex ') { 107 108 // http://www.speex.org/manual/node10.html 109 110 $ThisFileInfo['audio']['dataformat'] = 'speex'; 111 $ThisFileInfo['mime_type'] = 'audio/speex'; 112 $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; 113 $ThisFileInfo['audio']['lossless'] = false; 114 115 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' 116 $filedataoffset += 8; 117 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); 118 $filedataoffset += 20; 119 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 120 $filedataoffset += 4; 121 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 122 $filedataoffset += 4; 123 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 124 $filedataoffset += 4; 125 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 126 $filedataoffset += 4; 127 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 128 $filedataoffset += 4; 129 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 130 $filedataoffset += 4; 131 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 132 $filedataoffset += 4; 133 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 134 $filedataoffset += 4; 135 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 136 $filedataoffset += 4; 137 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 138 $filedataoffset += 4; 139 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 140 $filedataoffset += 4; 141 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 142 $filedataoffset += 4; 143 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 144 $filedataoffset += 4; 145 146 $ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); 147 $ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; 148 $ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; 149 $ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; 150 $ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); 151 152 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate']; 153 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels']; 154 if ($ThisFileInfo['speex']['vbr']) { 155 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; 156 } 157 158 } else { 159 160 $ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither'; 161 unset($ThisFileInfo['ogg']); 162 unset($ThisFileInfo['mime_type']); 163 return false; 164 165 } 166 167 168 // Page 2 - Comment Header 169 170 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 171 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 172 173 switch ($ThisFileInfo['audio']['dataformat']) { 174 175 case 'vorbis': 176 $filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 177 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); 178 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' 179 180 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); 181 break; 182 183 case 'flac': 184 if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) { 185 $ThisFileInfo['error'][] = 'Failed to parse FLAC headers'; 186 return false; 187 } 188 break; 189 190 case 'speex': 191 fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); 192 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); 193 break; 194 195 } 196 197 198 199 // Last Page - Number of Samples 200 201 fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET); 202 $LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE)); 203 if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { 204 fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET); 205 $ThisFileInfo['avdataend'] = ftell($fd); 206 $ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd); 207 $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position']; 208 if ($ThisFileInfo['ogg']['samples'] == 0) { 209 $ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; 210 return false; 211 } 212 $ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']); 213 } 214 215 if (!empty($ThisFileInfo['ogg']['bitrate_average'])) { 216 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average']; 217 } elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) { 218 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal']; 219 } elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) { 220 $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2; 221 } 222 if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) { 223 if ($ThisFileInfo['audio']['bitrate'] == 0) { 224 $ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; 225 return false; 226 } 227 $ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']); 228 } 229 230 if (isset($ThisFileInfo['ogg']['vendor'])) { 231 $ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']); 232 233 // Vorbis only 234 if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') { 235 236 // Vorbis 1.0 starts with Xiph.Org 237 if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) { 238 239 if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') { 240 241 // Set -b 128 on abr files 242 $ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000); 243 244 } elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) { 245 // Set -q N on vbr files 246 $ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']); 247 248 } 249 } 250 251 if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) { 252 $ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps'; 253 } 254 } 255 } 256 257 return true; 258 } 259 260 261 function ParseOggPageHeader(&$fd) { 262 // http://xiph.org/ogg/vorbis/doc/framing.html 263 $oggheader['page_start_offset'] = ftell($fd); // where we started from in the file 264 265 $filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE); 266 $filedataoffset = 0; 267 while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { 268 if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) { 269 // should be found before here 270 return false; 271 } 272 if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { 273 if (feof($fd) || (($filedata .= fread($fd, GETID3_FREAD_BUFFER_SIZE)) === false)) { 274 // get some more data, unless eof, in which case fail 275 return false; 276 } 277 } 278 } 279 $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' 280 281 $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 282 $filedataoffset += 1; 283 $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 284 $filedataoffset += 1; 285 $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet 286 $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) 287 $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos) 288 289 $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); 290 $filedataoffset += 8; 291 $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 292 $filedataoffset += 4; 293 $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 294 $filedataoffset += 4; 295 $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); 296 $filedataoffset += 4; 297 $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 298 $filedataoffset += 1; 299 $oggheader['page_length'] = 0; 300 for ($i = 0; $i < $oggheader['page_segments']; $i++) { 301 $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); 302 $filedataoffset += 1; 303 $oggheader['page_length'] += $oggheader['segment_table'][$i]; 304 } 305 $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset; 306 $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length']; 307 fseek($fd, $oggheader['header_end_offset'], SEEK_SET); 308 309 return $oggheader; 310 } 311 312 313 function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) { 314 315 $OriginalOffset = ftell($fd); 316 $CommentStartOffset = $OriginalOffset; 317 $commentdataoffset = 0; 318 $VorbisCommentPage = 1; 319 320 switch ($ThisFileInfo['audio']['dataformat']) { 321 case 'vorbis': 322 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block 323 fseek($fd, $CommentStartOffset, SEEK_SET); 324 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; 325 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); 326 327 $commentdataoffset += (strlen('vorbis') + 1); 328 break; 329 330 case 'flac': 331 fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET); 332 $commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']); 333 break; 334 335 case 'speex': 336 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block 337 fseek($fd, $CommentStartOffset, SEEK_SET); 338 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; 339 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); 340 break; 341 342 default: 343 return false; 344 break; 345 } 346 347 $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 348 $commentdataoffset += 4; 349 350 $ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); 351 $commentdataoffset += $VendorSize; 352 353 $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 354 $commentdataoffset += 4; 355 $ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset; 356 357 $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); 358 for ($i = 0; $i < $CommentsCount; $i++) { 359 360 $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; 361 362 if (ftell($fd) < ($ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4)) { 363 $VorbisCommentPage++; 364 365 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 366 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 367 368 // First, save what we haven't read yet 369 $AsYetUnusedData = substr($commentdata, $commentdataoffset); 370 371 // Then take that data off the end 372 $commentdata = substr($commentdata, 0, $commentdataoffset); 373 374 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct 375 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 376 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 377 378 // Finally, stick the unused data back on the end 379 $commentdata .= $AsYetUnusedData; 380 381 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 382 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); 383 384 } 385 $ThisFileInfo['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); 386 387 // replace avdataoffset with position just after the last vorbiscomment 388 $ThisFileInfo['avdataoffset'] = $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + $ThisFileInfo['ogg']['comments_raw'][$i]['size'] + 4; 389 390 $commentdataoffset += 4; 391 while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo['ogg']['comments_raw'][$i]['size']) { 392 if (($ThisFileInfo['ogg']['comments_raw'][$i]['size'] > $ThisFileInfo['avdataend']) || ($ThisFileInfo['ogg']['comments_raw'][$i]['size'] < 0)) { 393 $ThisFileInfo['error'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments'; 394 break 2; 395 } 396 397 $VorbisCommentPage++; 398 399 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); 400 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; 401 402 // First, save what we haven't read yet 403 $AsYetUnusedData = substr($commentdata, $commentdataoffset); 404 405 // Then take that data off the end 406 $commentdata = substr($commentdata, 0, $commentdataoffset); 407 408 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct 409 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 410 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); 411 412 // Finally, stick the unused data back on the end 413 $commentdata .= $AsYetUnusedData; 414 415 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); 416 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); 417 418 //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; 419 } 420 $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo['ogg']['comments_raw'][$i]['size']); 421 $commentdataoffset += $ThisFileInfo['ogg']['comments_raw'][$i]['size']; 422 423 if (!$commentstring) { 424 425 // no comment? 426 $ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$i.']'; 427 428 } elseif (strstr($commentstring, '=')) { 429 430 $commentexploded = explode('=', $commentstring, 2); 431 $ThisFileInfo['ogg']['comments_raw'][$i]['key'] = strtoupper($commentexploded[0]); 432 $ThisFileInfo['ogg']['comments_raw'][$i]['value'] = @$commentexploded[1]; 433 $ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']); 434 435 $ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value']; 436 437 $imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data']); 438 $ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] = getid3_lib::image_type_to_mime_type($imagechunkcheck[2]); 439 if (!$ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] || ($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] == 'application/octet-stream')) { 440 unset($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime']); 441 unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']); 442 } 443 444 } else { 445 446 $ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; 447 448 } 449 } 450 451 452 // Replay Gain Adjustment 453 // http://privatewww.essex.ac.uk/~djmrob/replaygain/ 454 if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) { 455 foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) { 456 switch ($index) { 457 case 'rg_audiophile': 458 case 'replaygain_album_gain': 459 $ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0]; 460 unset($ThisFileInfo['ogg']['comments'][$index]); 461 break; 462 463 case 'rg_radio': 464 case 'replaygain_track_gain': 465 $ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0]; 466 unset($ThisFileInfo['ogg']['comments'][$index]); 467 break; 468 469 case 'replaygain_album_peak': 470 $ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0]; 471 unset($ThisFileInfo['ogg']['comments'][$index]); 472 break; 473 474 case 'rg_peak': 475 case 'replaygain_track_peak': 476 $ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0]; 477 unset($ThisFileInfo['ogg']['comments'][$index]); 478 break; 479 480 481 default: 482 // do nothing 483 break; 484 } 485 } 486 } 487 488 fseek($fd, $OriginalOffset, SEEK_SET); 489 490 return true; 491 } 492 493 function SpeexBandModeLookup($mode) { 494 static $SpeexBandModeLookup = array(); 495 if (empty($SpeexBandModeLookup)) { 496 $SpeexBandModeLookup[0] = 'narrow'; 497 $SpeexBandModeLookup[1] = 'wide'; 498 $SpeexBandModeLookup[2] = 'ultra-wide'; 499 } 500 return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); 501 } 502 503 504 function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) { 505 for ($i = 0; $i < $SegmentNumber; $i++) { 506 $segmentlength = 0; 507 foreach ($OggInfoArray['segment_table'] as $key => $value) { 508 $segmentlength += $value; 509 if ($value < 255) { 510 break; 511 } 512 } 513 } 514 return $segmentlength; 515 } 516 517 518 function get_quality_from_nominal_bitrate($nominal_bitrate) { 519 520 // decrease precision 521 $nominal_bitrate = $nominal_bitrate / 1000; 522 523 if ($nominal_bitrate < 128) { 524 // q-1 to q4 525 $qval = ($nominal_bitrate - 64) / 16; 526 } elseif ($nominal_bitrate < 256) { 527 // q4 to q8 528 $qval = $nominal_bitrate / 32; 529 } elseif ($nominal_bitrate < 320) { 530 // q8 to q9 531 $qval = ($nominal_bitrate + 256) / 64; 532 } else { 533 // q9 to q10 534 $qval = ($nominal_bitrate + 1300) / 180; 535 } 536 //return $qval; // 5.031324 537 //return intval($qval); // 5 538 return round($qval, 1); // 5 or 4.9 539 } 540 541 } 542 543 ?>
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| Généré le : Mon Nov 26 21:04:15 2007 | par Balluche grâce à PHPXref 0.7 |
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