name : module.audio.monkey.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.monkey.php // // module for analyzing Monkey's Audio files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_monkey extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de> // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html $info['fileformat'] = 'mac'; $info['audio']['dataformat'] = 'mac'; $info['audio']['bitrate_mode'] = 'vbr'; $info['audio']['lossless'] = true; $info['monkeys_audio']['raw'] = array(); $thisfile_monkeysaudio = &$info['monkeys_audio']; $thisfile_monkeysaudio_raw = &$thisfile_monkeysaudio['raw']; $this->fseek($info['avdataoffset']); $MACheaderData = $this->fread(74); $thisfile_monkeysaudio_raw['magic'] = substr($MACheaderData, 0, 4); $magic = 'MAC '; if ($thisfile_monkeysaudio_raw['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_monkeysaudio_raw['magic']).'"'); unset($info['fileformat']); return false; } $thisfile_monkeysaudio_raw['nVersion'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 4, 2)); // appears to be uint32 in 3.98+ if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 6, 2)); $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 8, 2)); $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 10, 2)); $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 12, 4)); $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 16, 4)); $thisfile_monkeysaudio_raw['nWAVTerminatingBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 20, 4)); $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 24, 4)); $thisfile_monkeysaudio_raw['nFinalFrameSamples'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 28, 4)); $thisfile_monkeysaudio_raw['nPeakLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 32, 4)); $thisfile_monkeysaudio_raw['nSeekElements'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 38, 2)); $offset = 8; } else { $offset = 8; // APE_DESCRIPTOR $thisfile_monkeysaudio_raw['nDescriptorBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nHeaderBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nSeekTableBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nAPEFrameDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nAPEFrameDataBytesHigh'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nTerminatingDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['cFileMD5'] = substr($MACheaderData, $offset, 16); $offset += 16; // APE_HEADER $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); $offset += 2; $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); $offset += 2; $thisfile_monkeysaudio_raw['nBlocksPerFrame'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nFinalFrameBlocks'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; $thisfile_monkeysaudio_raw['nBitsPerSample'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); $offset += 2; $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); $offset += 2; $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); $offset += 4; } $thisfile_monkeysaudio['flags']['8-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0001); $thisfile_monkeysaudio['flags']['crc-32'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0002); $thisfile_monkeysaudio['flags']['peak_level'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0004); $thisfile_monkeysaudio['flags']['24-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0008); $thisfile_monkeysaudio['flags']['seek_elements'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0010); $thisfile_monkeysaudio['flags']['no_wav_header'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0020); $thisfile_monkeysaudio['version'] = $thisfile_monkeysaudio_raw['nVersion'] / 1000; $thisfile_monkeysaudio['compression'] = $this->MonkeyCompressionLevelNameLookup($thisfile_monkeysaudio_raw['nCompressionLevel']); if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { $thisfile_monkeysaudio['samples_per_frame'] = $this->MonkeySamplesPerFrame($thisfile_monkeysaudio_raw['nVersion'], $thisfile_monkeysaudio_raw['nCompressionLevel']); } $thisfile_monkeysaudio['bits_per_sample'] = ($thisfile_monkeysaudio['flags']['24-bit'] ? 24 : ($thisfile_monkeysaudio['flags']['8-bit'] ? 8 : 16)); $thisfile_monkeysaudio['channels'] = $thisfile_monkeysaudio_raw['nChannels']; $info['audio']['channels'] = $thisfile_monkeysaudio['channels']; $thisfile_monkeysaudio['sample_rate'] = $thisfile_monkeysaudio_raw['nSampleRate']; if ($thisfile_monkeysaudio['sample_rate'] == 0) { $this->error('Corrupt MAC file: frequency == zero'); return false; } $info['audio']['sample_rate'] = $thisfile_monkeysaudio['sample_rate']; if ($thisfile_monkeysaudio['flags']['peak_level']) { $thisfile_monkeysaudio['peak_level'] = $thisfile_monkeysaudio_raw['nPeakLevel']; $thisfile_monkeysaudio['peak_ratio'] = $thisfile_monkeysaudio['peak_level'] / pow(2, $thisfile_monkeysaudio['bits_per_sample'] - 1); } if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio_raw['nBlocksPerFrame']) + $thisfile_monkeysaudio_raw['nFinalFrameBlocks']; } else { $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio['samples_per_frame']) + $thisfile_monkeysaudio_raw['nFinalFrameSamples']; } $thisfile_monkeysaudio['playtime'] = $thisfile_monkeysaudio['samples'] / $thisfile_monkeysaudio['sample_rate']; if ($thisfile_monkeysaudio['playtime'] == 0) { $this->error('Corrupt MAC file: playtime == zero'); return false; } $info['playtime_seconds'] = $thisfile_monkeysaudio['playtime']; $thisfile_monkeysaudio['compressed_size'] = $info['avdataend'] - $info['avdataoffset']; $thisfile_monkeysaudio['uncompressed_size'] = $thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * ($thisfile_monkeysaudio['bits_per_sample'] / 8); if ($thisfile_monkeysaudio['uncompressed_size'] == 0) { $this->error('Corrupt MAC file: uncompressed_size == zero'); return false; } $thisfile_monkeysaudio['compression_ratio'] = $thisfile_monkeysaudio['compressed_size'] / ($thisfile_monkeysaudio['uncompressed_size'] + $thisfile_monkeysaudio_raw['nHeaderDataBytes']); $thisfile_monkeysaudio['bitrate'] = (($thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * $thisfile_monkeysaudio['bits_per_sample']) / $thisfile_monkeysaudio['playtime']) * $thisfile_monkeysaudio['compression_ratio']; $info['audio']['bitrate'] = $thisfile_monkeysaudio['bitrate']; // add size of MAC header to avdataoffset if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nDescriptorBytes']; $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderBytes']; $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nSeekTableBytes']; $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderDataBytes']; $info['avdataend'] -= $thisfile_monkeysaudio_raw['nTerminatingDataBytes']; } else { $info['avdataoffset'] += $offset; } if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { if ($thisfile_monkeysaudio_raw['cFileMD5'] === str_repeat("\x00", 16)) { //$this->warning('cFileMD5 is null'); } else { $info['md5_data_source'] = ''; $md5 = $thisfile_monkeysaudio_raw['cFileMD5']; for ($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']); } } } $info['audio']['bits_per_sample'] = $thisfile_monkeysaudio['bits_per_sample']; $info['audio']['encoder'] = 'MAC v'.number_format($thisfile_monkeysaudio['version'], 2); $info['audio']['encoder_options'] = ucfirst($thisfile_monkeysaudio['compression']).' compression'; return true; } /** * @param int $compressionlevel * * @return string */ public function MonkeyCompressionLevelNameLookup($compressionlevel) { static $MonkeyCompressionLevelNameLookup = array( 0 => 'unknown', 1000 => 'fast', 2000 => 'normal', 3000 => 'high', 4000 => 'extra-high', 5000 => 'insane' ); return (isset($MonkeyCompressionLevelNameLookup[$compressionlevel]) ? $MonkeyCompressionLevelNameLookup[$compressionlevel] : 'invalid'); } /** * @param int $versionid * @param int $compressionlevel * * @return int */ public function MonkeySamplesPerFrame($versionid, $compressionlevel) { if ($versionid >= 3950) { return 73728 * 4; } elseif ($versionid >= 3900) { return 73728; } elseif (($versionid >= 3800) && ($compressionlevel == 4000)) { return 73728; } else { return 9216; } } }