123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214 |
- <?php
- if (!defined('GETID3_INCLUDEPATH')) {
- exit;
- }
- class getid3_tak extends getid3_handler
- {
- public function Analyze() {
- $info = &$this->getid3->info;
- $info['fileformat'] = 'tak';
- $info['audio']['dataformat'] = 'tak';
- $info['audio']['bitrate_mode'] = 'vbr';
- $info['audio']['lossless'] = true;
- $info['tak_audio']['raw'] = array();
- $thisfile_takaudio = &$info['tak_audio'];
- $thisfile_takaudio_raw = &$thisfile_takaudio['raw'];
- $this->fseek($info['avdataoffset']);
- $TAKMetaData = $this->fread(4);
- $thisfile_takaudio_raw['magic'] = $TAKMetaData;
- $magic = 'tBaK';
- if ($thisfile_takaudio_raw['magic'] != $magic) {
- $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_takaudio_raw['magic']).'"');
- unset($info['fileformat']);
- return false;
- }
- $offset = 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread(4);
- $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1));
- $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3));
- if ($objtype == 1) {
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $thisfile_takaudio_raw['STREAMINFO'] = getid3_lib::LittleEndian2Bin(substr($TAKMetaData, 0, $objlength - 3));
- $offset += $objlength;
- $thisfile_takaudio['channels'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 1, 4)) + 1;
- $thisfile_takaudio['bits_per_sample'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 5, 5)) + 8;
- $thisfile_takaudio['sample_rate'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 10, 18)) + 6000;
- $thisfile_takaudio['samples'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 31, 35));
- $thisfile_takaudio['framesize'] = self::TAKFramesizeLookup(getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 66, 4)));
- $thisfile_takaudio['codectype'] = self::TAKCodecTypeLookup(getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 74, 6)));
- } else {
- $this->error('Expecting Type 1 (STREAMINFO) Metadata Object header, but found Type "'.$objtype.'" Object instead');
- unset($info['fileformat']);
- return false;
- }
- $this->fseek($offset);
- $TAKMetaData = $this->fread(4);
- $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1));
- $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3));
- while ($objtype != 0) {
- switch ($objtype) {
- case 4 :
-
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $ver = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 3));
- $major = ($ver & 0xff0000) >> 16;
- $minor = ($ver & 0x00ff00) >> 8;
- $revision= $ver & 0x0000ff;
- $thisfile_takaudio['version'] = 'TAK V '.$major.'.'.$minor.'.'.$revision;
- $thisfile_takaudio['profile'] = self::TAKProfileLookup(getid3_lib::BigEndian2Int(substr($TAKMetaData, 3, 1)));
- $offset += $objlength;
- break;
- case 6 :
-
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $thisfile_takaudio_raw['MD5Data'] = substr($TAKMetaData, 0, 16);
- $offset += $objlength;
- break;
- case 7 :
-
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $thisfile_takaudio['lastframe_pos'] = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 5));
- $thisfile_takaudio['last_frame_size'] = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 5, 3));
- $offset += $objlength;
- break;
- case 3 :
-
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $headersize = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 3));
- $footersize = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 3, 3));
- if ($headersize) $thisfile_takaudio_raw['header_data'] = substr($TAKMetaData, 6, $headersize);
- if ($footersize) $thisfile_takaudio_raw['footer_data'] = substr($TAKMetaData, $headersize, $footersize);
- $offset += $objlength;
- break;
- default :
-
- $offset += 4;
- $this->fseek($offset);
- $TAKMetaData = $this->fread($objlength);
- $offset += $objlength;
- break;
- }
- $this->fseek($offset);
- $TAKMetaData = $this->fread(4);
- $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1));
- $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3));
- }
-
- $info['avdataoffset'] = $offset;
- $info['audio']['channels'] = $thisfile_takaudio['channels'];
- if ($thisfile_takaudio['sample_rate'] == 0) {
- $this->error('Corrupt TAK file: samplerate == zero');
- return false;
- }
- $info['audio']['sample_rate'] = $thisfile_takaudio['sample_rate'];
- $thisfile_takaudio['playtime'] = $thisfile_takaudio['samples'] / $thisfile_takaudio['sample_rate'];
- if ($thisfile_takaudio['playtime'] == 0) {
- $this->error('Corrupt TAK file: playtime == zero');
- return false;
- }
- $info['playtime_seconds'] = $thisfile_takaudio['playtime'];
- $thisfile_takaudio['compressed_size'] = $info['avdataend'] - $info['avdataoffset'];
- $thisfile_takaudio['uncompressed_size'] = $thisfile_takaudio['samples'] * $thisfile_takaudio['channels'] * ($thisfile_takaudio['bits_per_sample'] / 8);
- if ($thisfile_takaudio['uncompressed_size'] == 0) {
- $this->error('Corrupt TAK file: uncompressed_size == zero');
- return false;
- }
- $thisfile_takaudio['compression_ratio'] = $thisfile_takaudio['compressed_size'] / ($thisfile_takaudio['uncompressed_size'] + $offset);
- $thisfile_takaudio['bitrate'] = (($thisfile_takaudio['samples'] * $thisfile_takaudio['channels'] * $thisfile_takaudio['bits_per_sample']) / $thisfile_takaudio['playtime']) * $thisfile_takaudio['compression_ratio'];
- $info['audio']['bitrate'] = $thisfile_takaudio['bitrate'];
- if (empty($thisfile_takaudio_raw['MD5Data'])) {
-
- } elseif ($thisfile_takaudio_raw['MD5Data'] === str_repeat("\x00", 16)) {
-
- } else {
- $info['md5_data_source'] = '';
- $md5 = $thisfile_takaudio_raw['MD5Data'];
- for ($i = 0; $i < strlen($md5); $i++) {
- $info['md5_data_source'] .= str_pad(dechex(ord($md5[$i])), 2, '00', STR_PAD_LEFT);
- }
- if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) {
- unset($info['md5_data_source']);
- }
- }
- foreach (array('bits_per_sample', 'version', 'profile') as $key) {
- if (!empty($thisfile_takaudio[$key])) {
- $info['audio'][$key] = $thisfile_takaudio[$key];
- }
- }
- return true;
- }
- public function TAKFramesizeLookup($framesize) {
- static $TAKFramesizeLookup = array(
- 0 => '94 ms',
- 1 => '125 ms',
- 2 => '188 ms',
- 3 => '250 ms',
- 4 => '4096 samples',
- 5 => '8192 samples',
- 6 => '16384 samples',
- 7 => '512 samples',
- 8 => '1024 samples',
- 9 => '2048 samples'
- );
- return (isset($TAKFramesizeLookup[$framesize]) ? $TAKFramesizeLookup[$framesize] : 'invalid');
- }
- public function TAKCodecTypeLookup($code) {
- static $TAKCodecTypeLookup = array(
- 0 => 'Integer 24 bit (TAK 1.0)',
- 1 => 'Experimental!',
- 2 => 'Integer 24 bit (TAK 2.0)',
- 3 => 'LossyWav (TAK 2.1)',
- 4 => 'Integer 24 bit MC (TAK 2.2)'
- );
- return (isset($TAKCodecTypeLookup[$code]) ? $TAKCodecTypeLookup[$code] : 'invalid');
- }
- public function TAKProfileLookup($code) {
- $out ='-p';
- $evaluation = ($code & 0xf0) >> 4;
- $compresion = $code & 0x0f;
- static $TAKEvaluationLookup = array(
- 0 => '',
- 1 => 'e',
- 2 => 'm'
- );
- return (isset($TAKEvaluationLookup[$evaluation]) ? $out .= $compresion . $TAKEvaluationLookup[$evaluation] : 'invalid');
- }
- }
|