--- /dev/null
+<?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.monkey.php //
+// module for analyzing Monkey's Audio files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_monkey extends getid3_handler
+{
+
+ 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;
+ }
+
+ 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');
+ }
+
+ 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;
+ }
+ }
+
+}
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