/usr/share/php/getid3/module.audio.wavpack.php is in php-getid3 1.9.15+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 | <?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
// also https://github.com/JamesHeinrich/getID3 //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.audio.wavpack.php //
// module for analyzing WavPack v4.0+ Audio files //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
class getid3_wavpack extends getid3_handler
{
public function Analyze() {
$info = &$this->getid3->info;
$this->fseek($info['avdataoffset']);
while (true) {
$wavpackheader = $this->fread(32);
if ($this->ftell() >= $info['avdataend']) {
break;
} elseif (feof($this->getid3->fp)) {
break;
} elseif (
isset($info['wavpack']['blockheader']['total_samples']) &&
isset($info['wavpack']['blockheader']['block_samples']) &&
($info['wavpack']['blockheader']['total_samples'] > 0) &&
($info['wavpack']['blockheader']['block_samples'] > 0) &&
(!isset($info['wavpack']['riff_trailer_size']) || ($info['wavpack']['riff_trailer_size'] <= 0)) &&
((isset($info['wavpack']['config_flags']['md5_checksum']) && ($info['wavpack']['config_flags']['md5_checksum'] === false)) || !empty($info['md5_data_source']))) {
break;
}
$blockheader_offset = $this->ftell() - 32;
$blockheader_magic = substr($wavpackheader, 0, 4);
$blockheader_size = getid3_lib::LittleEndian2Int(substr($wavpackheader, 4, 4));
$magic = 'wvpk';
if ($blockheader_magic != $magic) {
$this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$blockheader_offset.', found "'.getid3_lib::PrintHexBytes($blockheader_magic).'"');
switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
case 'wavpack':
case 'wvc':
break;
default:
unset($info['fileformat']);
unset($info['audio']);
unset($info['wavpack']);
break;
}
return false;
}
if (empty($info['wavpack']['blockheader']['block_samples']) ||
empty($info['wavpack']['blockheader']['total_samples']) ||
($info['wavpack']['blockheader']['block_samples'] <= 0) ||
($info['wavpack']['blockheader']['total_samples'] <= 0)) {
// Also, it is possible that the first block might not have
// any samples (block_samples == 0) and in this case you should skip blocks
// until you find one with samples because the other information (like
// total_samples) are not guaranteed to be correct until (block_samples > 0)
// Finally, I have defined a format for files in which the length is not known
// (for example when raw files are created using pipes). In these cases
// total_samples will be -1 and you must seek to the final block to determine
// the total number of samples.
$info['audio']['dataformat'] = 'wavpack';
$info['fileformat'] = 'wavpack';
$info['audio']['lossless'] = true;
$info['audio']['bitrate_mode'] = 'vbr';
$info['wavpack']['blockheader']['offset'] = $blockheader_offset;
$info['wavpack']['blockheader']['magic'] = $blockheader_magic;
$info['wavpack']['blockheader']['size'] = $blockheader_size;
if ($info['wavpack']['blockheader']['size'] >= 0x100000) {
$this->error('Expecting WavPack block size less than "0x100000", found "'.$info['wavpack']['blockheader']['size'].'" at offset '.$info['wavpack']['blockheader']['offset']);
switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
case 'wavpack':
case 'wvc':
break;
default:
unset($info['fileformat']);
unset($info['audio']);
unset($info['wavpack']);
break;
}
return false;
}
$info['wavpack']['blockheader']['minor_version'] = ord($wavpackheader{8});
$info['wavpack']['blockheader']['major_version'] = ord($wavpackheader{9});
if (($info['wavpack']['blockheader']['major_version'] != 4) ||
(($info['wavpack']['blockheader']['minor_version'] < 4) &&
($info['wavpack']['blockheader']['minor_version'] > 16))) {
$this->error('Expecting WavPack version between "4.2" and "4.16", found version "'.$info['wavpack']['blockheader']['major_version'].'.'.$info['wavpack']['blockheader']['minor_version'].'" at offset '.$info['wavpack']['blockheader']['offset']);
switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
case 'wavpack':
case 'wvc':
break;
default:
unset($info['fileformat']);
unset($info['audio']);
unset($info['wavpack']);
break;
}
return false;
}
$info['wavpack']['blockheader']['track_number'] = ord($wavpackheader{10}); // unused
$info['wavpack']['blockheader']['index_number'] = ord($wavpackheader{11}); // unused
$info['wavpack']['blockheader']['total_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 12, 4));
$info['wavpack']['blockheader']['block_index'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 16, 4));
$info['wavpack']['blockheader']['block_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 20, 4));
$info['wavpack']['blockheader']['flags_raw'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 24, 4));
$info['wavpack']['blockheader']['crc'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 28, 4));
$info['wavpack']['blockheader']['flags']['bytes_per_sample'] = 1 + ($info['wavpack']['blockheader']['flags_raw'] & 0x00000003);
$info['wavpack']['blockheader']['flags']['mono'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000004);
$info['wavpack']['blockheader']['flags']['hybrid'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000008);
$info['wavpack']['blockheader']['flags']['joint_stereo'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000010);
$info['wavpack']['blockheader']['flags']['cross_decorrelation'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000020);
$info['wavpack']['blockheader']['flags']['hybrid_noiseshape'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000040);
$info['wavpack']['blockheader']['flags']['ieee_32bit_float'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000080);
$info['wavpack']['blockheader']['flags']['int_32bit'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000100);
$info['wavpack']['blockheader']['flags']['hybrid_bitrate_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000200);
$info['wavpack']['blockheader']['flags']['hybrid_balance_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000400);
$info['wavpack']['blockheader']['flags']['multichannel_initial'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000800);
$info['wavpack']['blockheader']['flags']['multichannel_final'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00001000);
$info['audio']['lossless'] = !$info['wavpack']['blockheader']['flags']['hybrid'];
}
while (!feof($this->getid3->fp) && ($this->ftell() < ($blockheader_offset + $blockheader_size + 8))) {
$metablock = array('offset'=>$this->ftell());
$metablockheader = $this->fread(2);
if (feof($this->getid3->fp)) {
break;
}
$metablock['id'] = ord($metablockheader{0});
$metablock['function_id'] = ($metablock['id'] & 0x3F);
$metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']);
// The 0x20 bit in the id of the meta subblocks (which is defined as
// ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that
// if a decoder encounters an id that it does not know about, it uses
// that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set
// then the decoder simply ignores the metadata, but if it is zero
// then the decoder should quit because it means that an understanding
// of the metadata is required to correctly decode the audio.
$metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20);
$metablock['padded_data'] = (bool) ($metablock['id'] & 0x40);
$metablock['large_block'] = (bool) ($metablock['id'] & 0x80);
if ($metablock['large_block']) {
$metablockheader .= $this->fread(2);
}
$metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words
$metablock['data'] = null;
if ($metablock['size'] > 0) {
switch ($metablock['function_id']) {
case 0x21: // ID_RIFF_HEADER
case 0x22: // ID_RIFF_TRAILER
case 0x23: // ID_REPLAY_GAIN
case 0x24: // ID_CUESHEET
case 0x25: // ID_CONFIG_BLOCK
case 0x26: // ID_MD5_CHECKSUM
$metablock['data'] = $this->fread($metablock['size']);
if ($metablock['padded_data']) {
// padded to the nearest even byte
$metablock['size']--;
$metablock['data'] = substr($metablock['data'], 0, -1);
}
break;
case 0x00: // ID_DUMMY
case 0x01: // ID_ENCODER_INFO
case 0x02: // ID_DECORR_TERMS
case 0x03: // ID_DECORR_WEIGHTS
case 0x04: // ID_DECORR_SAMPLES
case 0x05: // ID_ENTROPY_VARS
case 0x06: // ID_HYBRID_PROFILE
case 0x07: // ID_SHAPING_WEIGHTS
case 0x08: // ID_FLOAT_INFO
case 0x09: // ID_INT32_INFO
case 0x0A: // ID_WV_BITSTREAM
case 0x0B: // ID_WVC_BITSTREAM
case 0x0C: // ID_WVX_BITSTREAM
case 0x0D: // ID_CHANNEL_INFO
$this->fseek($metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size']);
break;
default:
$this->warning('Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset']);
$this->fseek($metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size']);
break;
}
switch ($metablock['function_id']) {
case 0x21: // ID_RIFF_HEADER
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
$original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4));
$getid3_temp = new getID3();
$getid3_temp->openfile($this->getid3->filename);
$getid3_riff = new getid3_riff($getid3_temp);
$getid3_riff->ParseRIFFdata($metablock['data']);
$metablock['riff'] = $getid3_temp->info['riff'];
$info['audio']['sample_rate'] = $getid3_temp->info['riff']['raw']['fmt ']['nSamplesPerSec'];
unset($getid3_riff, $getid3_temp);
$metablock['riff']['original_filesize'] = $original_wav_filesize;
$info['wavpack']['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size'];
$info['playtime_seconds'] = $info['wavpack']['blockheader']['total_samples'] / $info['audio']['sample_rate'];
// Safe RIFF header in case there's a RIFF footer later
$metablockRIFFheader = $metablock['data'];
break;
case 0x22: // ID_RIFF_TRAILER
$metablockRIFFfooter = $metablockRIFFheader.$metablock['data'];
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
$startoffset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2);
$getid3_temp = new getID3();
$getid3_temp->openfile($this->getid3->filename);
$getid3_temp->info['avdataend'] = $info['avdataend'];
//$getid3_temp->info['fileformat'] = 'riff';
$getid3_riff = new getid3_riff($getid3_temp);
$metablock['riff'] = $getid3_riff->ParseRIFF($startoffset, $startoffset + $metablock['size']);
if (!empty($metablock['riff']['INFO'])) {
getid3_riff::parseComments($metablock['riff']['INFO'], $metablock['comments']);
$info['tags']['riff'] = $metablock['comments'];
}
unset($getid3_temp, $getid3_riff);
break;
case 0x23: // ID_REPLAY_GAIN
$this->warning('WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']);
break;
case 0x24: // ID_CUESHEET
$this->warning('WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']);
break;
case 0x25: // ID_CONFIG_BLOCK
$metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3));
$metablock['flags']['adobe_mode'] = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats
$metablock['flags']['fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode
$metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast
$metablock['flags']['high_flag'] = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode
$metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet)
$metablock['flags']['bitrate_kbps'] = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample
$metablock['flags']['auto_shaping'] = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping
$metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified
$metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified
$metablock['flags']['copy_time'] = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source
$metablock['flags']['create_exe'] = (bool) ($metablock['flags_raw'] & 0x000400); // create executable
$metablock['flags']['create_wvc'] = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file
$metablock['flags']['optimize_wvc'] = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression
$metablock['flags']['quality_mode'] = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode
$metablock['flags']['raw_flag'] = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet)
$metablock['flags']['calc_noise'] = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode
$metablock['flags']['lossy_mode'] = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information)
$metablock['flags']['extra_mode'] = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode
$metablock['flags']['skip_wvx'] = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints
$metablock['flags']['md5_checksum'] = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature
$metablock['flags']['quiet_mode'] = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress %
$info['wavpack']['config_flags'] = $metablock['flags'];
$info['audio']['encoder_options'] = '';
if ($info['wavpack']['blockheader']['flags']['hybrid']) {
$info['audio']['encoder_options'] .= ' -b???';
}
$info['audio']['encoder_options'] .= ($metablock['flags']['adobe_mode'] ? ' -a' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['optimize_wvc'] ? ' -cc' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['create_exe'] ? ' -e' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['fast_flag'] ? ' -f' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['joint_override'] ? ' -j?' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['high_flag'] ? ' -h' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['md5_checksum'] ? ' -m' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['calc_noise'] ? ' -n' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['shape_override'] ? ' -s?' : '');
$info['audio']['encoder_options'] .= ($metablock['flags']['extra_mode'] ? ' -x?' : '');
if (!empty($info['audio']['encoder_options'])) {
$info['audio']['encoder_options'] = trim($info['audio']['encoder_options']);
} elseif (isset($info['audio']['encoder_options'])) {
unset($info['audio']['encoder_options']);
}
break;
case 0x26: // ID_MD5_CHECKSUM
if (strlen($metablock['data']) == 16) {
$info['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false));
} else {
$this->warning('Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes');
}
break;
case 0x00: // ID_DUMMY
case 0x01: // ID_ENCODER_INFO
case 0x02: // ID_DECORR_TERMS
case 0x03: // ID_DECORR_WEIGHTS
case 0x04: // ID_DECORR_SAMPLES
case 0x05: // ID_ENTROPY_VARS
case 0x06: // ID_HYBRID_PROFILE
case 0x07: // ID_SHAPING_WEIGHTS
case 0x08: // ID_FLOAT_INFO
case 0x09: // ID_INT32_INFO
case 0x0A: // ID_WV_BITSTREAM
case 0x0B: // ID_WVC_BITSTREAM
case 0x0C: // ID_WVX_BITSTREAM
case 0x0D: // ID_CHANNEL_INFO
unset($metablock);
break;
}
}
if (!empty($metablock)) {
$info['wavpack']['metablocks'][] = $metablock;
}
}
}
$info['audio']['encoder'] = 'WavPack v'.$info['wavpack']['blockheader']['major_version'].'.'.str_pad($info['wavpack']['blockheader']['minor_version'], 2, '0', STR_PAD_LEFT);
$info['audio']['bits_per_sample'] = $info['wavpack']['blockheader']['flags']['bytes_per_sample'] * 8;
$info['audio']['channels'] = ($info['wavpack']['blockheader']['flags']['mono'] ? 1 : 2);
if (!empty($info['playtime_seconds'])) {
$info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
} else {
$info['audio']['dataformat'] = 'wvc';
}
return true;
}
public function WavPackMetablockNameLookup(&$id) {
static $WavPackMetablockNameLookup = array(
0x00 => 'Dummy',
0x01 => 'Encoder Info',
0x02 => 'Decorrelation Terms',
0x03 => 'Decorrelation Weights',
0x04 => 'Decorrelation Samples',
0x05 => 'Entropy Variables',
0x06 => 'Hybrid Profile',
0x07 => 'Shaping Weights',
0x08 => 'Float Info',
0x09 => 'Int32 Info',
0x0A => 'WV Bitstream',
0x0B => 'WVC Bitstream',
0x0C => 'WVX Bitstream',
0x0D => 'Channel Info',
0x21 => 'RIFF header',
0x22 => 'RIFF trailer',
0x23 => 'Replay Gain',
0x24 => 'Cuesheet',
0x25 => 'Config Block',
0x26 => 'MD5 Checksum',
);
return (isset($WavPackMetablockNameLookup[$id]) ? $WavPackMetablockNameLookup[$id] : '');
}
}
|