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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.wavpack.php // 11 // module for analyzing WavPack v4.0+ Audio files // 12 // dependencies: NONE // 13 // /// 14 ///////////////////////////////////////////////////////////////// 15 16 17 class getid3_wavpack 18 { 19 20 function getid3_wavpack(&$fd, &$ThisFileInfo) { 21 22 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); 23 24 while (true) { 25 26 $wavpackheader = fread($fd, 32); 27 28 if (ftell($fd) >= $ThisFileInfo['avdataend']) { 29 break; 30 } elseif (feof($fd)) { 31 break; 32 } elseif ( 33 (@$ThisFileInfo['wavpack']['blockheader']['total_samples'] > 0) && 34 (@$ThisFileInfo['wavpack']['blockheader']['block_samples'] > 0) && 35 (!isset($ThisFileInfo['wavpack']['riff_trailer_size']) || ($ThisFileInfo['wavpack']['riff_trailer_size'] <= 0)) && 36 ((@$ThisFileInfo['wavpack']['config_flags']['md5_checksum'] === false) || !empty($ThisFileInfo['md5_data_source']))) { 37 break; 38 } 39 40 $blockheader_offset = ftell($fd) - 32; 41 $blockheader_magic = substr($wavpackheader, 0, 4); 42 $blockheader_size = getid3_lib::LittleEndian2Int(substr($wavpackheader, 4, 4)); 43 44 if ($blockheader_magic != 'wvpk') { 45 $ThisFileInfo['error'][] = 'Expecting "wvpk" at offset '.$blockheader_offset.', found "'.$blockheader_magic.'"'; 46 if ((@$ThisFileInfo['audio']['dataformat'] != 'wavpack') && (@$ThisFileInfo['audio']['dataformat'] != 'wvc')) { 47 unset($ThisFileInfo['fileformat']); 48 unset($ThisFileInfo['audio']); 49 unset($ThisFileInfo['wavpack']); 50 } 51 return false; 52 } 53 54 55 if ((@$ThisFileInfo['wavpack']['blockheader']['block_samples'] <= 0) || 56 (@$ThisFileInfo['wavpack']['blockheader']['total_samples'] <= 0)) { 57 // Also, it is possible that the first block might not have 58 // any samples (block_samples == 0) and in this case you should skip blocks 59 // until you find one with samples because the other information (like 60 // total_samples) are not guaranteed to be correct until (block_samples > 0) 61 62 // Finally, I have defined a format for files in which the length is not known 63 // (for example when raw files are created using pipes). In these cases 64 // total_samples will be -1 and you must seek to the final block to determine 65 // the total number of samples. 66 67 68 $ThisFileInfo['audio']['dataformat'] = 'wavpack'; 69 $ThisFileInfo['fileformat'] = 'wavpack'; 70 $ThisFileInfo['audio']['lossless'] = true; 71 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; 72 73 $ThisFileInfo['wavpack']['blockheader']['offset'] = $blockheader_offset; 74 $ThisFileInfo['wavpack']['blockheader']['magic'] = $blockheader_magic; 75 $ThisFileInfo['wavpack']['blockheader']['size'] = $blockheader_size; 76 77 if ($ThisFileInfo['wavpack']['blockheader']['size'] >= 0x100000) { 78 $ThisFileInfo['error'][] = 'Expecting WavPack block size less than "0x100000", found "'.$ThisFileInfo['wavpack']['blockheader']['size'].'" at offset '.$ThisFileInfo['wavpack']['blockheader']['offset']; 79 if ((@$ThisFileInfo['audio']['dataformat'] != 'wavpack') && (@$ThisFileInfo['audio']['dataformat'] != 'wvc')) { 80 unset($ThisFileInfo['fileformat']); 81 unset($ThisFileInfo['audio']); 82 unset($ThisFileInfo['wavpack']); 83 } 84 return false; 85 } 86 87 $ThisFileInfo['wavpack']['blockheader']['minor_version'] = ord($wavpackheader{8}); 88 $ThisFileInfo['wavpack']['blockheader']['major_version'] = ord($wavpackheader{9}); 89 90 if (($ThisFileInfo['wavpack']['blockheader']['major_version'] != 4) || 91 (($ThisFileInfo['wavpack']['blockheader']['minor_version'] < 4) && 92 ($ThisFileInfo['wavpack']['blockheader']['minor_version'] > 16))) { 93 $ThisFileInfo['error'][] = 'Expecting WavPack version between "4.2" and "4.16", found version "'.$ThisFileInfo['wavpack']['blockheader']['major_version'].'.'.$ThisFileInfo['wavpack']['blockheader']['minor_version'].'" at offset '.$ThisFileInfo['wavpack']['blockheader']['offset']; 94 if ((@$ThisFileInfo['audio']['dataformat'] != 'wavpack') && (@$ThisFileInfo['audio']['dataformat'] != 'wvc')) { 95 unset($ThisFileInfo['fileformat']); 96 unset($ThisFileInfo['audio']); 97 unset($ThisFileInfo['wavpack']); 98 } 99 return false; 100 } 101 102 $ThisFileInfo['wavpack']['blockheader']['track_number'] = ord($wavpackheader{10}); // unused 103 $ThisFileInfo['wavpack']['blockheader']['index_number'] = ord($wavpackheader{11}); // unused 104 $ThisFileInfo['wavpack']['blockheader']['total_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 12, 4)); 105 $ThisFileInfo['wavpack']['blockheader']['block_index'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 16, 4)); 106 $ThisFileInfo['wavpack']['blockheader']['block_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 20, 4)); 107 $ThisFileInfo['wavpack']['blockheader']['flags_raw'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 24, 4)); 108 $ThisFileInfo['wavpack']['blockheader']['crc'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 28, 4)); 109 110 $ThisFileInfo['wavpack']['blockheader']['flags']['bytes_per_sample'] = 1 + ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000003); 111 $ThisFileInfo['wavpack']['blockheader']['flags']['mono'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000004); 112 $ThisFileInfo['wavpack']['blockheader']['flags']['hybrid'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000008); 113 $ThisFileInfo['wavpack']['blockheader']['flags']['joint_stereo'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000010); 114 $ThisFileInfo['wavpack']['blockheader']['flags']['cross_decorrelation'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000020); 115 $ThisFileInfo['wavpack']['blockheader']['flags']['hybrid_noiseshape'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000040); 116 $ThisFileInfo['wavpack']['blockheader']['flags']['ieee_32bit_float'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000080); 117 $ThisFileInfo['wavpack']['blockheader']['flags']['int_32bit'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000100); 118 $ThisFileInfo['wavpack']['blockheader']['flags']['hybrid_bitrate_noise'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000200); 119 $ThisFileInfo['wavpack']['blockheader']['flags']['hybrid_balance_noise'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000400); 120 $ThisFileInfo['wavpack']['blockheader']['flags']['multichannel_initial'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00000800); 121 $ThisFileInfo['wavpack']['blockheader']['flags']['multichannel_final'] = (bool) ($ThisFileInfo['wavpack']['blockheader']['flags_raw'] & 0x00001000); 122 123 $ThisFileInfo['audio']['lossless'] = !$ThisFileInfo['wavpack']['blockheader']['flags']['hybrid']; 124 } 125 126 while (!feof($fd) && (ftell($fd) < ($blockheader_offset + $blockheader_size + 8))) { 127 128 $metablock = array('offset'=>ftell($fd)); 129 $metablockheader = fread($fd, 2); 130 if (feof($fd)) { 131 break; 132 } 133 $metablock['id'] = ord($metablockheader{0}); 134 $metablock['function_id'] = ($metablock['id'] & 0x3F); 135 $metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']); 136 137 // The 0x20 bit in the id of the meta subblocks (which is defined as 138 // ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that 139 // if a decoder encounters an id that it does not know about, it uses 140 // that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set 141 // then the decoder simply ignores the metadata, but if it is zero 142 // then the decoder should quit because it means that an understanding 143 // of the metadata is required to correctly decode the audio. 144 $metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20); 145 146 $metablock['padded_data'] = (bool) ($metablock['id'] & 0x40); 147 $metablock['large_block'] = (bool) ($metablock['id'] & 0x80); 148 if ($metablock['large_block']) { 149 $metablockheader .= fread($fd, 2); 150 } 151 $metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words 152 $metablock['data'] = null; 153 154 if ($metablock['size'] > 0) { 155 156 switch ($metablock['function_id']) { 157 case 0x21: // ID_RIFF_HEADER 158 case 0x22: // ID_RIFF_TRAILER 159 case 0x23: // ID_REPLAY_GAIN 160 case 0x24: // ID_CUESHEET 161 case 0x25: // ID_CONFIG_BLOCK 162 case 0x26: // ID_MD5_CHECKSUM 163 $metablock['data'] = fread($fd, $metablock['size']); 164 165 if ($metablock['padded_data']) { 166 // padded to the nearest even byte 167 $metablock['size']--; 168 $metablock['data'] = substr($metablock['data'], 0, -1); 169 } 170 break; 171 172 case 0x00: // ID_DUMMY 173 case 0x01: // ID_ENCODER_INFO 174 case 0x02: // ID_DECORR_TERMS 175 case 0x03: // ID_DECORR_WEIGHTS 176 case 0x04: // ID_DECORR_SAMPLES 177 case 0x05: // ID_ENTROPY_VARS 178 case 0x06: // ID_HYBRID_PROFILE 179 case 0x07: // ID_SHAPING_WEIGHTS 180 case 0x08: // ID_FLOAT_INFO 181 case 0x09: // ID_INT32_INFO 182 case 0x0A: // ID_WV_BITSTREAM 183 case 0x0B: // ID_WVC_BITSTREAM 184 case 0x0C: // ID_WVX_BITSTREAM 185 case 0x0D: // ID_CHANNEL_INFO 186 fseek($fd, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET); 187 break; 188 189 default: 190 $ThisFileInfo['warning'][] = 'Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset']; 191 fseek($fd, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET); 192 break; 193 } 194 195 switch ($metablock['function_id']) { 196 case 0x21: // ID_RIFF_HEADER 197 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); 198 $original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4)); 199 getid3_riff::ParseRIFFdata($metablock['data'], $ParsedRIFFheader); 200 $metablock['riff'] = $ParsedRIFFheader['riff']; 201 $metablock['riff']['original_filesize'] = $original_wav_filesize; 202 $ThisFileInfo['wavpack']['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size']; 203 204 $ThisFileInfo['audio']['sample_rate'] = $ParsedRIFFheader['riff']['raw']['fmt ']['nSamplesPerSec']; 205 $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['wavpack']['blockheader']['total_samples'] / $ThisFileInfo['audio']['sample_rate']; 206 207 // Safe RIFF header in case there's a RIFF footer later 208 $metablockRIFFheader = $metablock['data']; 209 break; 210 211 212 case 0x22: // ID_RIFF_TRAILER 213 $metablockRIFFfooter = $metablockRIFFheader.$metablock['data']; 214 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); 215 216 $ftell_old = ftell($fd); 217 $startoffset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2); 218 $ParsedRIFFfooter = array('avdataend'=>$ThisFileInfo['avdataend'], 'fileformat'=>'riff', 'error'=>array(), 'warning'=>array()); 219 $metablock['riff'] = getid3_riff::ParseRIFF($fd, $startoffset, $startoffset + $metablock['size'], $ParsedRIFFfooter); 220 fseek($fd, $ftell_old, SEEK_SET); 221 222 if (!empty($metablock['riff']['INFO'])) { 223 getid3_riff::RIFFcommentsParse($metablock['riff']['INFO'], $metablock['comments']); 224 $ThisFileInfo['tags']['riff'] = $metablock['comments']; 225 } 226 break; 227 228 229 case 0x23: // ID_REPLAY_GAIN 230 $ThisFileInfo['warning'][] = 'WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']; 231 break; 232 233 234 case 0x24: // ID_CUESHEET 235 $ThisFileInfo['warning'][] = 'WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']; 236 break; 237 238 239 case 0x25: // ID_CONFIG_BLOCK 240 $metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3)); 241 242 $metablock['flags']['adobe_mode'] = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats 243 $metablock['flags']['fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode 244 $metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast 245 $metablock['flags']['high_flag'] = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode 246 $metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet) 247 $metablock['flags']['bitrate_kbps'] = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample 248 $metablock['flags']['auto_shaping'] = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping 249 $metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified 250 $metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified 251 $metablock['flags']['copy_time'] = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source 252 $metablock['flags']['create_exe'] = (bool) ($metablock['flags_raw'] & 0x000400); // create executable 253 $metablock['flags']['create_wvc'] = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file 254 $metablock['flags']['optimize_wvc'] = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression 255 $metablock['flags']['quality_mode'] = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode 256 $metablock['flags']['raw_flag'] = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet) 257 $metablock['flags']['calc_noise'] = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode 258 $metablock['flags']['lossy_mode'] = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information) 259 $metablock['flags']['extra_mode'] = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode 260 $metablock['flags']['skip_wvx'] = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints 261 $metablock['flags']['md5_checksum'] = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature 262 $metablock['flags']['quiet_mode'] = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress % 263 264 $ThisFileInfo['wavpack']['config_flags'] = $metablock['flags']; 265 266 267 if ($ThisFileInfo['wavpack']['blockheader']['flags']['hybrid']) { 268 @$ThisFileInfo['audio']['encoder_options'] .= ' -b???'; 269 } 270 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['adobe_mode'] ? ' -a' : ''); 271 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['optimize_wvc'] ? ' -cc' : ''); 272 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['create_exe'] ? ' -e' : ''); 273 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['fast_flag'] ? ' -f' : ''); 274 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['joint_override'] ? ' -j?' : ''); 275 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['high_flag'] ? ' -h' : ''); 276 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['md5_checksum'] ? ' -m' : ''); 277 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['calc_noise'] ? ' -n' : ''); 278 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['shape_override'] ? ' -s?' : ''); 279 @$ThisFileInfo['audio']['encoder_options'] .= ($metablock['flags']['extra_mode'] ? ' -x?' : ''); 280 if (@$ThisFileInfo['audio']['encoder_options']) { 281 $ThisFileInfo['audio']['encoder_options'] = trim(@$ThisFileInfo['audio']['encoder_options']); 282 } 283 elseif (isset($ThisFileInfo['audio']['encoder_options'])) { 284 unset($ThisFileInfo['audio']['encoder_options']); 285 } 286 break; 287 288 289 case 0x26: // ID_MD5_CHECKSUM 290 if (strlen($metablock['data']) == 16) { 291 $ThisFileInfo['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false)); 292 } else { 293 $ThisFileInfo['warning'][] = 'Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes'; 294 } 295 break; 296 297 298 case 0x00: // ID_DUMMY 299 case 0x01: // ID_ENCODER_INFO 300 case 0x02: // ID_DECORR_TERMS 301 case 0x03: // ID_DECORR_WEIGHTS 302 case 0x04: // ID_DECORR_SAMPLES 303 case 0x05: // ID_ENTROPY_VARS 304 case 0x06: // ID_HYBRID_PROFILE 305 case 0x07: // ID_SHAPING_WEIGHTS 306 case 0x08: // ID_FLOAT_INFO 307 case 0x09: // ID_INT32_INFO 308 case 0x0A: // ID_WV_BITSTREAM 309 case 0x0B: // ID_WVC_BITSTREAM 310 case 0x0C: // ID_WVX_BITSTREAM 311 case 0x0D: // ID_CHANNEL_INFO 312 unset($metablock); 313 break; 314 } 315 316 } 317 if (!empty($metablock)) { 318 $ThisFileInfo['wavpack']['metablocks'][] = $metablock; 319 } 320 321 } 322 323 } 324 325 $ThisFileInfo['audio']['encoder'] = 'WavPack v'.$ThisFileInfo['wavpack']['blockheader']['major_version'].'.'.str_pad($ThisFileInfo['wavpack']['blockheader']['minor_version'], 2, '0', STR_PAD_LEFT); 326 $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['wavpack']['blockheader']['flags']['bytes_per_sample'] * 8; 327 $ThisFileInfo['audio']['channels'] = ($ThisFileInfo['wavpack']['blockheader']['flags']['mono'] ? 1 : 2); 328 329 if (@$ThisFileInfo['playtime_seconds']) { 330 331 $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds']; 332 333 } else { 334 335 $ThisFileInfo['audio']['dataformat'] = 'wvc'; 336 337 } 338 339 return true; 340 } 341 342 343 function WavPackMetablockNameLookup(&$id) { 344 static $WavPackMetablockNameLookup = array( 345 0x00 => 'Dummy', 346 0x01 => 'Encoder Info', 347 0x02 => 'Decorrelation Terms', 348 0x03 => 'Decorrelation Weights', 349 0x04 => 'Decorrelation Samples', 350 0x05 => 'Entropy Variables', 351 0x06 => 'Hybrid Profile', 352 0x07 => 'Shaping Weights', 353 0x08 => 'Float Info', 354 0x09 => 'Int32 Info', 355 0x0A => 'WV Bitstream', 356 0x0B => 'WVC Bitstream', 357 0x0C => 'WVX Bitstream', 358 0x0D => 'Channel Info', 359 0x21 => 'RIFF header', 360 0x22 => 'RIFF trailer', 361 0x23 => 'Replay Gain', 362 0x24 => 'Cuesheet', 363 0x25 => 'Config Block', 364 0x26 => 'MD5 Checksum', 365 ); 366 return (@$WavPackMetablockNameLookup[$id]); 367 } 368 369 } 370 371 372 ?>
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| Généré le : Mon Nov 26 21:04:15 2007 | par Balluche grâce à PHPXref 0.7 |
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