File indexing completed on 2024-05-12 05:58:14
0001 <?php 0002 ///////////////////////////////////////////////////////////////// 0003 /// getID3() by James Heinrich <info@getid3.org> // 0004 // available at http://getid3.sourceforge.net // 0005 // or http://www.getid3.org // 0006 // also https://github.com/JamesHeinrich/getID3 // 0007 ///////////////////////////////////////////////////////////////// 0008 // See readme.txt for more details // 0009 ///////////////////////////////////////////////////////////////// 0010 // // 0011 // module.audio.monkey.php // 0012 // module for analyzing Monkey's Audio files // 0013 // dependencies: NONE // 0014 // /// 0015 ///////////////////////////////////////////////////////////////// 0016 0017 0018 class getid3_monkey extends getid3_handler 0019 { 0020 0021 public function Analyze() { 0022 $info = &$this->getid3->info; 0023 0024 // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de> 0025 // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html 0026 0027 $info['fileformat'] = 'mac'; 0028 $info['audio']['dataformat'] = 'mac'; 0029 $info['audio']['bitrate_mode'] = 'vbr'; 0030 $info['audio']['lossless'] = true; 0031 0032 $info['monkeys_audio']['raw'] = array(); 0033 $thisfile_monkeysaudio = &$info['monkeys_audio']; 0034 $thisfile_monkeysaudio_raw = &$thisfile_monkeysaudio['raw']; 0035 0036 $this->fseek($info['avdataoffset']); 0037 $MACheaderData = $this->fread(74); 0038 0039 $thisfile_monkeysaudio_raw['magic'] = substr($MACheaderData, 0, 4); 0040 $magic = 'MAC '; 0041 if ($thisfile_monkeysaudio_raw['magic'] != $magic) { 0042 $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_monkeysaudio_raw['magic']).'"'; 0043 unset($info['fileformat']); 0044 return false; 0045 } 0046 $thisfile_monkeysaudio_raw['nVersion'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 4, 2)); // appears to be uint32 in 3.98+ 0047 0048 if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { 0049 $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 6, 2)); 0050 $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 8, 2)); 0051 $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 10, 2)); 0052 $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 12, 4)); 0053 $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 16, 4)); 0054 $thisfile_monkeysaudio_raw['nWAVTerminatingBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 20, 4)); 0055 $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 24, 4)); 0056 $thisfile_monkeysaudio_raw['nFinalFrameSamples'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 28, 4)); 0057 $thisfile_monkeysaudio_raw['nPeakLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 32, 4)); 0058 $thisfile_monkeysaudio_raw['nSeekElements'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 38, 2)); 0059 $offset = 8; 0060 } else { 0061 $offset = 8; 0062 // APE_DESCRIPTOR 0063 $thisfile_monkeysaudio_raw['nDescriptorBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0064 $offset += 4; 0065 $thisfile_monkeysaudio_raw['nHeaderBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0066 $offset += 4; 0067 $thisfile_monkeysaudio_raw['nSeekTableBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0068 $offset += 4; 0069 $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0070 $offset += 4; 0071 $thisfile_monkeysaudio_raw['nAPEFrameDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0072 $offset += 4; 0073 $thisfile_monkeysaudio_raw['nAPEFrameDataBytesHigh'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0074 $offset += 4; 0075 $thisfile_monkeysaudio_raw['nTerminatingDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0076 $offset += 4; 0077 $thisfile_monkeysaudio_raw['cFileMD5'] = substr($MACheaderData, $offset, 16); 0078 $offset += 16; 0079 0080 // APE_HEADER 0081 $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); 0082 $offset += 2; 0083 $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); 0084 $offset += 2; 0085 $thisfile_monkeysaudio_raw['nBlocksPerFrame'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0086 $offset += 4; 0087 $thisfile_monkeysaudio_raw['nFinalFrameBlocks'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0088 $offset += 4; 0089 $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0090 $offset += 4; 0091 $thisfile_monkeysaudio_raw['nBitsPerSample'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); 0092 $offset += 2; 0093 $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); 0094 $offset += 2; 0095 $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); 0096 $offset += 4; 0097 } 0098 0099 $thisfile_monkeysaudio['flags']['8-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0001); 0100 $thisfile_monkeysaudio['flags']['crc-32'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0002); 0101 $thisfile_monkeysaudio['flags']['peak_level'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0004); 0102 $thisfile_monkeysaudio['flags']['24-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0008); 0103 $thisfile_monkeysaudio['flags']['seek_elements'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0010); 0104 $thisfile_monkeysaudio['flags']['no_wav_header'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0020); 0105 $thisfile_monkeysaudio['version'] = $thisfile_monkeysaudio_raw['nVersion'] / 1000; 0106 $thisfile_monkeysaudio['compression'] = $this->MonkeyCompressionLevelNameLookup($thisfile_monkeysaudio_raw['nCompressionLevel']); 0107 if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { 0108 $thisfile_monkeysaudio['samples_per_frame'] = $this->MonkeySamplesPerFrame($thisfile_monkeysaudio_raw['nVersion'], $thisfile_monkeysaudio_raw['nCompressionLevel']); 0109 } 0110 $thisfile_monkeysaudio['bits_per_sample'] = ($thisfile_monkeysaudio['flags']['24-bit'] ? 24 : ($thisfile_monkeysaudio['flags']['8-bit'] ? 8 : 16)); 0111 $thisfile_monkeysaudio['channels'] = $thisfile_monkeysaudio_raw['nChannels']; 0112 $info['audio']['channels'] = $thisfile_monkeysaudio['channels']; 0113 $thisfile_monkeysaudio['sample_rate'] = $thisfile_monkeysaudio_raw['nSampleRate']; 0114 if ($thisfile_monkeysaudio['sample_rate'] == 0) { 0115 $info['error'][] = 'Corrupt MAC file: frequency == zero'; 0116 return false; 0117 } 0118 $info['audio']['sample_rate'] = $thisfile_monkeysaudio['sample_rate']; 0119 if ($thisfile_monkeysaudio['flags']['peak_level']) { 0120 $thisfile_monkeysaudio['peak_level'] = $thisfile_monkeysaudio_raw['nPeakLevel']; 0121 $thisfile_monkeysaudio['peak_ratio'] = $thisfile_monkeysaudio['peak_level'] / pow(2, $thisfile_monkeysaudio['bits_per_sample'] - 1); 0122 } 0123 if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { 0124 $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio_raw['nBlocksPerFrame']) + $thisfile_monkeysaudio_raw['nFinalFrameBlocks']; 0125 } else { 0126 $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio['samples_per_frame']) + $thisfile_monkeysaudio_raw['nFinalFrameSamples']; 0127 } 0128 $thisfile_monkeysaudio['playtime'] = $thisfile_monkeysaudio['samples'] / $thisfile_monkeysaudio['sample_rate']; 0129 if ($thisfile_monkeysaudio['playtime'] == 0) { 0130 $info['error'][] = 'Corrupt MAC file: playtime == zero'; 0131 return false; 0132 } 0133 $info['playtime_seconds'] = $thisfile_monkeysaudio['playtime']; 0134 $thisfile_monkeysaudio['compressed_size'] = $info['avdataend'] - $info['avdataoffset']; 0135 $thisfile_monkeysaudio['uncompressed_size'] = $thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * ($thisfile_monkeysaudio['bits_per_sample'] / 8); 0136 if ($thisfile_monkeysaudio['uncompressed_size'] == 0) { 0137 $info['error'][] = 'Corrupt MAC file: uncompressed_size == zero'; 0138 return false; 0139 } 0140 $thisfile_monkeysaudio['compression_ratio'] = $thisfile_monkeysaudio['compressed_size'] / ($thisfile_monkeysaudio['uncompressed_size'] + $thisfile_monkeysaudio_raw['nHeaderDataBytes']); 0141 $thisfile_monkeysaudio['bitrate'] = (($thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * $thisfile_monkeysaudio['bits_per_sample']) / $thisfile_monkeysaudio['playtime']) * $thisfile_monkeysaudio['compression_ratio']; 0142 $info['audio']['bitrate'] = $thisfile_monkeysaudio['bitrate']; 0143 0144 // add size of MAC header to avdataoffset 0145 if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { 0146 $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nDescriptorBytes']; 0147 $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderBytes']; 0148 $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nSeekTableBytes']; 0149 $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderDataBytes']; 0150 0151 $info['avdataend'] -= $thisfile_monkeysaudio_raw['nTerminatingDataBytes']; 0152 } else { 0153 $info['avdataoffset'] += $offset; 0154 } 0155 0156 if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { 0157 if ($thisfile_monkeysaudio_raw['cFileMD5'] === str_repeat("\x00", 16)) { 0158 //$info['warning'][] = 'cFileMD5 is null'; 0159 } else { 0160 $info['md5_data_source'] = ''; 0161 $md5 = $thisfile_monkeysaudio_raw['cFileMD5']; 0162 for ($i = 0; $i < strlen($md5); $i++) { 0163 $info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); 0164 } 0165 if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) { 0166 unset($info['md5_data_source']); 0167 } 0168 } 0169 } 0170 0171 0172 0173 $info['audio']['bits_per_sample'] = $thisfile_monkeysaudio['bits_per_sample']; 0174 $info['audio']['encoder'] = 'MAC v'.number_format($thisfile_monkeysaudio['version'], 2); 0175 $info['audio']['encoder_options'] = ucfirst($thisfile_monkeysaudio['compression']).' compression'; 0176 0177 return true; 0178 } 0179 0180 public function MonkeyCompressionLevelNameLookup($compressionlevel) { 0181 static $MonkeyCompressionLevelNameLookup = array( 0182 0 => 'unknown', 0183 1000 => 'fast', 0184 2000 => 'normal', 0185 3000 => 'high', 0186 4000 => 'extra-high', 0187 5000 => 'insane' 0188 ); 0189 return (isset($MonkeyCompressionLevelNameLookup[$compressionlevel]) ? $MonkeyCompressionLevelNameLookup[$compressionlevel] : 'invalid'); 0190 } 0191 0192 public function MonkeySamplesPerFrame($versionid, $compressionlevel) { 0193 if ($versionid >= 3950) { 0194 return 73728 * 4; 0195 } elseif ($versionid >= 3900) { 0196 return 73728; 0197 } elseif (($versionid >= 3800) && ($compressionlevel == 4000)) { 0198 return 73728; 0199 } else { 0200 return 9216; 0201 } 0202 } 0203 0204 }