Mercurial > judyates
view e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.monkey.php @ 11:ed6ee381b8fd judyates
[svn r12] compressed photos and assembled them into a working web gallery
author | rlm |
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date | Mon, 12 Apr 2010 02:31:43 -0400 |
parents | 3f6b44aa6b35 |
children |
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1 <?php2 // +----------------------------------------------------------------------+3 // | PHP version 5 |4 // +----------------------------------------------------------------------+5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |6 // +----------------------------------------------------------------------+7 // | This source file is subject to version 2 of the GPL license, |8 // | that is bundled with this package in the file license.txt and is |9 // | available through the world-wide-web at the following url: |10 // | http://www.gnu.org/copyleft/gpl.html |11 // +----------------------------------------------------------------------+12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |13 // +----------------------------------------------------------------------+14 // | Authors: James Heinrich <infoØgetid3*org> |15 // | Allan Hansen <ahØartemis*dk> |16 // +----------------------------------------------------------------------+17 // | module.audio.monkey.php |18 // | Module for analyzing Monkey's Audio files |19 // | dependencies: NONE |20 // +----------------------------------------------------------------------+21 //22 // $Id: module.audio.monkey.php,v 1.2 2006/11/02 10:48:01 ah Exp $26 class getid3_monkey extends getid3_handler27 {29 public function Analyze() {31 $getid3 = $this->getid3;33 // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de>34 // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html36 $getid3->info['fileformat'] = 'mac';37 $getid3->info['audio']['dataformat'] = 'mac';38 $getid3->info['audio']['bitrate_mode'] = 'vbr';39 $getid3->info['audio']['lossless'] = true;41 $getid3->info['monkeys_audio']['raw'] = array ();42 $info_monkeys_audio = &$getid3->info['monkeys_audio'];43 $info_monkeys_audio_raw = &$info_monkeys_audio['raw'];45 // Read file header46 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);47 $mac_header_data = fread($getid3->fp, 74);49 $info_monkeys_audio_raw['magic'] = 'MAC '; // Magic bytes51 // Read MAC version52 $info_monkeys_audio_raw['nVersion'] = getid3_lib::LittleEndian2Int(substr($mac_header_data, 4, 2)); // appears to be uint32 in 3.98+54 // Parse MAC Header < v398055 if ($info_monkeys_audio_raw['nVersion'] < 3980) {57 getid3_lib::ReadSequence("LittleEndian2Int", $info_monkeys_audio_raw, $mac_header_data, 6,58 array (59 'nCompressionLevel' => 2,60 'nFormatFlags' => 2,61 'nChannels' => 2,62 'nSampleRate' => 4,63 'nHeaderDataBytes' => 4,64 'nWAVTerminatingBytes' => 4,65 'nTotalFrames' => 4,66 'nFinalFrameSamples' => 4,67 'nPeakLevel' => 4,68 'IGNORE-1' => 2,69 'nSeekElements' => 270 )71 );72 }74 // Parse MAC Header >= v398075 else {77 getid3_lib::ReadSequence("LittleEndian2Int", $info_monkeys_audio_raw, $mac_header_data, 8,78 array (79 // APE_DESCRIPTOR80 'nDescriptorBytes' => 4,81 'nHeaderBytes' => 4,82 'nSeekTableBytes' => 4,83 'nHeaderDataBytes' => 4,84 'nAPEFrameDataBytes' => 4,85 'nAPEFrameDataBytesHigh'=> 4,86 'nTerminatingDataBytes' => 4,88 // MD5 - string89 'cFileMD5' => -16,91 // APE_HEADER92 'nCompressionLevel' => 2,93 'nFormatFlags' => 2,94 'nBlocksPerFrame' => 4,95 'nFinalFrameBlocks' => 4,96 'nTotalFrames' => 4,97 'nBitsPerSample' => 2,98 'nChannels' => 2,99 'nSampleRate' => 4100 )101 );102 }104 // Process data105 $info_monkeys_audio['flags']['8-bit'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0001);106 $info_monkeys_audio['flags']['crc-32'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0002);107 $info_monkeys_audio['flags']['peak_level'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0004);108 $info_monkeys_audio['flags']['24-bit'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0008);109 $info_monkeys_audio['flags']['seek_elements'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0010);110 $info_monkeys_audio['flags']['no_wav_header'] = (bool)($info_monkeys_audio_raw['nFormatFlags'] & 0x0020);112 $info_monkeys_audio['version'] = $info_monkeys_audio_raw['nVersion'] / 1000;114 $info_monkeys_audio['compression'] = getid3_monkey::MonkeyCompressionLevelNameLookup($info_monkeys_audio_raw['nCompressionLevel']);116 $info_monkeys_audio['bits_per_sample'] = ($info_monkeys_audio['flags']['24-bit'] ? 24 : ($info_monkeys_audio['flags']['8-bit'] ? 8 : 16));118 $info_monkeys_audio['channels'] = $info_monkeys_audio_raw['nChannels'];120 $getid3->info['audio']['channels'] = $info_monkeys_audio['channels'];122 $info_monkeys_audio['sample_rate'] = $info_monkeys_audio_raw['nSampleRate'];124 $getid3->info['audio']['sample_rate'] = $info_monkeys_audio['sample_rate'];126 if ($info_monkeys_audio['flags']['peak_level']) {127 $info_monkeys_audio['peak_level'] = $info_monkeys_audio_raw['nPeakLevel'];128 $info_monkeys_audio['peak_ratio'] = $info_monkeys_audio['peak_level'] / pow(2, $info_monkeys_audio['bits_per_sample'] - 1);129 }131 // MAC >= v3980132 if ($info_monkeys_audio_raw['nVersion'] >= 3980) {133 $info_monkeys_audio['samples'] = (($info_monkeys_audio_raw['nTotalFrames'] - 1) * $info_monkeys_audio_raw['nBlocksPerFrame']) + $info_monkeys_audio_raw['nFinalFrameBlocks'];134 }136 // MAC < v3980137 else {138 $info_monkeys_audio['samples_per_frame'] = getid3_monkey::MonkeySamplesPerFrame($info_monkeys_audio_raw['nVersion'], $info_monkeys_audio_raw['nCompressionLevel']);139 $info_monkeys_audio['samples'] = (($info_monkeys_audio_raw['nTotalFrames'] - 1) * $info_monkeys_audio['samples_per_frame']) + $info_monkeys_audio_raw['nFinalFrameSamples'];140 }142 $info_monkeys_audio['playtime'] = $info_monkeys_audio['samples'] / $info_monkeys_audio['sample_rate'];144 $getid3->info['playtime_seconds'] = $info_monkeys_audio['playtime'];146 $info_monkeys_audio['compressed_size'] = $getid3->info['avdataend'] - $getid3->info['avdataoffset'];147 $info_monkeys_audio['uncompressed_size'] = $info_monkeys_audio['samples'] * $info_monkeys_audio['channels'] * ($info_monkeys_audio['bits_per_sample'] / 8);148 $info_monkeys_audio['compression_ratio'] = $info_monkeys_audio['compressed_size'] / ($info_monkeys_audio['uncompressed_size'] + $info_monkeys_audio_raw['nHeaderDataBytes']);149 $info_monkeys_audio['bitrate'] = (($info_monkeys_audio['samples'] * $info_monkeys_audio['channels'] * $info_monkeys_audio['bits_per_sample']) / $info_monkeys_audio['playtime']) * $info_monkeys_audio['compression_ratio'];151 $getid3->info['audio']['bitrate'] = $info_monkeys_audio['bitrate'];153 $getid3->info['audio']['bits_per_sample'] = $info_monkeys_audio['bits_per_sample'];154 $getid3->info['audio']['encoder'] = 'MAC v'.number_format($info_monkeys_audio['version'], 2);155 $getid3->info['audio']['encoder_options'] = ucfirst($info_monkeys_audio['compression']).' compression';157 // MAC >= v3980 - get avdataoffsets from MAC header158 if ($info_monkeys_audio_raw['nVersion'] >= 3980) {159 $getid3->info['avdataoffset'] += $info_monkeys_audio_raw['nDescriptorBytes'] + $info_monkeys_audio_raw['nHeaderBytes'] + $info_monkeys_audio_raw['nSeekTableBytes'] + $info_monkeys_audio_raw['nHeaderDataBytes'];160 $getid3->info['avdataend'] -= $info_monkeys_audio_raw['nTerminatingDataBytes'];161 }163 // MAC < v3980 Add size of MAC header to avdataoffset164 else {165 $getid3->info['avdataoffset'] += 8;166 }168 // Convert md5sum to 32 byte string169 if (@$info_monkeys_audio_raw['cFileMD5']) {170 if ($info_monkeys_audio_raw['cFileMD5'] !== str_repeat("\x00", 16)) {171 $getid3->info['md5_data_source'] = '';172 $md5 = $info_monkeys_audio_raw['cFileMD5'];173 for ($i = 0; $i < strlen($md5); $i++) {174 $getid3->info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT);175 }176 if (!preg_match('/^[0-9a-f]{32}$/', $getid3->info['md5_data_source'])) {177 unset($getid3->info['md5_data_source']);178 }179 }180 }183 return true;184 }188 public static function MonkeyCompressionLevelNameLookup($compression_level) {190 static $lookup = array (191 0 => 'unknown',192 1000 => 'fast',193 2000 => 'normal',194 3000 => 'high',195 4000 => 'extra-high',196 5000 => 'insane'197 );198 return (isset($lookup[$compression_level]) ? $lookup[$compression_level] : 'invalid');199 }203 public static function MonkeySamplesPerFrame($version_id, $compression_level) {205 if ($version_id >= 3950) {206 return 73728 * 4;207 }208 if (($version_id >= 3900) || (($version_id >= 3800) && ($compression_level == 4000))) {209 return 73728;210 }211 return 9216;212 }214 }216 ?>