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[autoinstallsdev/mediawiki.git] / vendor / james-heinrich / getid3 / getid3 / module.audio.au.php

diff --git a/vendor/james-heinrich/getid3/getid3/module.audio.au.php b/vendor/james-heinrich/getid3/getid3/module.audio.au.php
new file mode 100644 (file)
index 0000000..075ee8c
--- /dev/null
+++ b/vendor/james-heinrich/getid3/getid3/module.audio.au.php
@@ -0,0 +1,163 @@
+<?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.au.php                                         //
+// module for analyzing AU files                               //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_au extends getid3_handler
+{
+
+       public function Analyze() {
+               $info = &$this->getid3->info;
+
+               $this->fseek($info['avdataoffset']);
+               $AUheader  = $this->fread(8);
+
+               $magic = '.snd';
+               if (substr($AUheader, 0, 4) != $magic) {
+                       $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" (".snd") at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($AUheader, 0, 4)).'"');
+                       return false;
+               }
+
+               // shortcut
+               $info['au'] = array();
+               $thisfile_au        = &$info['au'];
+
+               $info['fileformat']            = 'au';
+               $info['audio']['dataformat']   = 'au';
+               $info['audio']['bitrate_mode'] = 'cbr';
+               $thisfile_au['encoding']               = 'ISO-8859-1';
+
+               $thisfile_au['header_length']   = getid3_lib::BigEndian2Int(substr($AUheader,  4, 4));
+               $AUheader .= $this->fread($thisfile_au['header_length'] - 8);
+               $info['avdataoffset'] += $thisfile_au['header_length'];
+
+               $thisfile_au['data_size']             = getid3_lib::BigEndian2Int(substr($AUheader,  8, 4));
+               $thisfile_au['data_format_id']        = getid3_lib::BigEndian2Int(substr($AUheader, 12, 4));
+               $thisfile_au['sample_rate']           = getid3_lib::BigEndian2Int(substr($AUheader, 16, 4));
+               $thisfile_au['channels']              = getid3_lib::BigEndian2Int(substr($AUheader, 20, 4));
+               $thisfile_au['comments']['comment'][] =                      trim(substr($AUheader, 24));
+
+               $thisfile_au['data_format'] = $this->AUdataFormatNameLookup($thisfile_au['data_format_id']);
+               $thisfile_au['used_bits_per_sample'] = $this->AUdataFormatUsedBitsPerSampleLookup($thisfile_au['data_format_id']);
+               if ($thisfile_au['bits_per_sample'] = $this->AUdataFormatBitsPerSampleLookup($thisfile_au['data_format_id'])) {
+                       $info['audio']['bits_per_sample'] = $thisfile_au['bits_per_sample'];
+               } else {
+                       unset($thisfile_au['bits_per_sample']);
+               }
+
+               $info['audio']['sample_rate']  = $thisfile_au['sample_rate'];
+               $info['audio']['channels']     = $thisfile_au['channels'];
+
+               if (($info['avdataoffset'] + $thisfile_au['data_size']) > $info['avdataend']) {
+                       $this->warning('Possible truncated file - expecting "'.$thisfile_au['data_size'].'" bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' bytes"');
+               }
+
+               $info['playtime_seconds'] = $thisfile_au['data_size'] / ($thisfile_au['sample_rate'] * $thisfile_au['channels'] * ($thisfile_au['used_bits_per_sample'] / 8));
+               $info['audio']['bitrate'] = ($thisfile_au['data_size'] * 8) / $info['playtime_seconds'];
+
+               return true;
+       }
+
+       public function AUdataFormatNameLookup($id) {
+               static $AUdataFormatNameLookup = array(
+                       0  => 'unspecified format',
+                       1  => '8-bit mu-law',
+                       2  => '8-bit linear',
+                       3  => '16-bit linear',
+                       4  => '24-bit linear',
+                       5  => '32-bit linear',
+                       6  => 'floating-point',
+                       7  => 'double-precision float',
+                       8  => 'fragmented sampled data',
+                       9  => 'SUN_FORMAT_NESTED',
+                       10 => 'DSP program',
+                       11 => '8-bit fixed-point',
+                       12 => '16-bit fixed-point',
+                       13 => '24-bit fixed-point',
+                       14 => '32-bit fixed-point',
+
+                       16 => 'non-audio display data',
+                       17 => 'SND_FORMAT_MULAW_SQUELCH',
+                       18 => '16-bit linear with emphasis',
+                       19 => '16-bit linear with compression',
+                       20 => '16-bit linear with emphasis + compression',
+                       21 => 'Music Kit DSP commands',
+                       22 => 'SND_FORMAT_DSP_COMMANDS_SAMPLES',
+                       23 => 'CCITT g.721 4-bit ADPCM',
+                       24 => 'CCITT g.722 ADPCM',
+                       25 => 'CCITT g.723 3-bit ADPCM',
+                       26 => 'CCITT g.723 5-bit ADPCM',
+                       27 => 'A-Law 8-bit'
+               );
+               return (isset($AUdataFormatNameLookup[$id]) ? $AUdataFormatNameLookup[$id] : false);
+       }
+
+       public function AUdataFormatBitsPerSampleLookup($id) {
+               static $AUdataFormatBitsPerSampleLookup = array(
+                       1  => 8,
+                       2  => 8,
+                       3  => 16,
+                       4  => 24,
+                       5  => 32,
+                       6  => 32,
+                       7  => 64,
+
+                       11 => 8,
+                       12 => 16,
+                       13 => 24,
+                       14 => 32,
+
+                       18 => 16,
+                       19 => 16,
+                       20 => 16,
+
+                       23 => 16,
+
+                       25 => 16,
+                       26 => 16,
+                       27 => 8
+               );
+               return (isset($AUdataFormatBitsPerSampleLookup[$id]) ? $AUdataFormatBitsPerSampleLookup[$id] : false);
+       }
+
+       public function AUdataFormatUsedBitsPerSampleLookup($id) {
+               static $AUdataFormatUsedBitsPerSampleLookup = array(
+                       1  => 8,
+                       2  => 8,
+                       3  => 16,
+                       4  => 24,
+                       5  => 32,
+                       6  => 32,
+                       7  => 64,
+
+                       11 => 8,
+                       12 => 16,
+                       13 => 24,
+                       14 => 32,
+
+                       18 => 16,
+                       19 => 16,
+                       20 => 16,
+
+                       23 => 4,
+
+                       25 => 3,
+                       26 => 5,
+                       27 => 8,
+               );
+               return (isset($AUdataFormatUsedBitsPerSampleLookup[$id]) ? $AUdataFormatUsedBitsPerSampleLookup[$id] : false);
+       }
+
+}