diff options
Diffstat (limited to 'getid3/module.audio.monkey.php')
| -rw-r--r-- | getid3/module.audio.monkey.php | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/getid3/module.audio.monkey.php b/getid3/module.audio.monkey.php new file mode 100644 index 0000000..42382ad --- /dev/null +++ b/getid3/module.audio.monkey.php @@ -0,0 +1,202 @@ +<?php +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// available at http://getid3.sourceforge.net // +// or http://www.getid3.org // +///////////////////////////////////////////////////////////////// +// See readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.audio.monkey.php // +// module for analyzing Monkey's Audio files // +// dependencies: NONE // +// /// +///////////////////////////////////////////////////////////////// + + +class getid3_monkey +{ + + function getid3_monkey(&$fd, &$ThisFileInfo) { + // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de> + // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html + + $ThisFileInfo['fileformat'] = 'mac'; + $ThisFileInfo['audio']['dataformat'] = 'mac'; + $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; + $ThisFileInfo['audio']['lossless'] = true; + + $ThisFileInfo['monkeys_audio']['raw'] = array(); + $thisfile_monkeysaudio = &$ThisFileInfo['monkeys_audio']; + $thisfile_monkeysaudio_raw = &$thisfile_monkeysaudio['raw']; + + fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); + $MACheaderData = fread($fd, 74); + + $thisfile_monkeysaudio_raw['magic'] = substr($MACheaderData, 0, 4); + if ($thisfile_monkeysaudio_raw['magic'] != 'MAC ') { + $ThisFileInfo['error'][] = 'Expecting "MAC" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$thisfile_monkeysaudio_raw['magic'].'"'; + unset($ThisFileInfo['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']; + $ThisFileInfo['audio']['channels'] = $thisfile_monkeysaudio['channels']; + $thisfile_monkeysaudio['sample_rate'] = $thisfile_monkeysaudio_raw['nSampleRate']; + if ($thisfile_monkeysaudio['sample_rate'] == 0) { + $ThisFileInfo['error'][] = 'Corrupt MAC file: frequency == zero'; + return false; + } + $ThisFileInfo['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) { + $ThisFileInfo['error'][] = 'Corrupt MAC file: playtime == zero'; + return false; + } + $ThisFileInfo['playtime_seconds'] = $thisfile_monkeysaudio['playtime']; + $thisfile_monkeysaudio['compressed_size'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']; + $thisfile_monkeysaudio['uncompressed_size'] = $thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * ($thisfile_monkeysaudio['bits_per_sample'] / 8); + if ($thisfile_monkeysaudio['uncompressed_size'] == 0) { + $ThisFileInfo['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']; + $ThisFileInfo['audio']['bitrate'] = $thisfile_monkeysaudio['bitrate']; + + // add size of MAC header to avdataoffset + if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { + $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nDescriptorBytes']; + $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderBytes']; + $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nSeekTableBytes']; + $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderDataBytes']; + + $ThisFileInfo['avdataend'] -= $thisfile_monkeysaudio_raw['nTerminatingDataBytes']; + } else { + $ThisFileInfo['avdataoffset'] += $offset; + } + + if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { + if ($thisfile_monkeysaudio_raw['cFileMD5'] === str_repeat("\x00", 16)) { + //$ThisFileInfo['warning'][] = 'cFileMD5 is null'; + } else { + $ThisFileInfo['md5_data_source'] = ''; + $md5 = $thisfile_monkeysaudio_raw['cFileMD5']; + for ($i = 0; $i < strlen($md5); $i++) { + $ThisFileInfo['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); + } + if (!preg_match('/^[0-9a-f]{32}$/', $ThisFileInfo['md5_data_source'])) { + unset($ThisFileInfo['md5_data_source']); + } + } + } + + + + $ThisFileInfo['audio']['bits_per_sample'] = $thisfile_monkeysaudio['bits_per_sample']; + $ThisFileInfo['audio']['encoder'] = 'MAC v'.number_format($thisfile_monkeysaudio['version'], 2); + $ThisFileInfo['audio']['encoder_options'] = ucfirst($thisfile_monkeysaudio['compression']).' compression'; + + return true; + } + + 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'); + } + + 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; + } + } + +} + +?>
\ No newline at end of file |