MediaWiki 1.30.2

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

diff --git a/vendor/james-heinrich/getid3/getid3/module.audio.tta.php b/vendor/james-heinrich/getid3/getid3/module.audio.tta.php
new file mode 100644 (file)
index 0000000..78d27b0
--- /dev/null
+++ b/vendor/james-heinrich/getid3/getid3/module.audio.tta.php
@@ -0,0 +1,107 @@
+<?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.tta.php                                        //
+// module for analyzing TTA Audio files                        //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_tta extends getid3_handler
+{
+
+       public function Analyze() {
+               $info = &$this->getid3->info;
+
+               $info['fileformat']            = 'tta';
+               $info['audio']['dataformat']   = 'tta';
+               $info['audio']['lossless']     = true;
+               $info['audio']['bitrate_mode'] = 'vbr';
+
+               $this->fseek($info['avdataoffset']);
+               $ttaheader = $this->fread(26);
+
+               $info['tta']['magic'] = substr($ttaheader, 0, 3);
+               $magic = 'TTA';
+               if ($info['tta']['magic'] != $magic) {
+                       $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['tta']['magic']).'"');
+                       unset($info['fileformat']);
+                       unset($info['audio']);
+                       unset($info['tta']);
+                       return false;
+               }
+
+               switch ($ttaheader{3}) {
+                       case "\x01": // TTA v1.x
+                       case "\x02": // TTA v1.x
+                       case "\x03": // TTA v1.x
+                               // "It was the demo-version of the TTA encoder. There is no released format with such header. TTA encoder v1 is not supported about a year."
+                               $info['tta']['major_version'] = 1;
+                               $info['avdataoffset'] += 16;
+
+                               $info['tta']['compression_level']   = ord($ttaheader{3});
+                               $info['tta']['channels']            = getid3_lib::LittleEndian2Int(substr($ttaheader,  4,  2));
+                               $info['tta']['bits_per_sample']     = getid3_lib::LittleEndian2Int(substr($ttaheader,  6,  2));
+                               $info['tta']['sample_rate']         = getid3_lib::LittleEndian2Int(substr($ttaheader,  8,  4));
+                               $info['tta']['samples_per_channel'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12,  4));
+
+                               $info['audio']['encoder_options']   = '-e'.$info['tta']['compression_level'];
+                               $info['playtime_seconds']           = $info['tta']['samples_per_channel'] / $info['tta']['sample_rate'];
+                               break;
+
+                       case '2': // TTA v2.x
+                               // "I have hurried to release the TTA 2.0 encoder. Format documentation is removed from our site. This format still in development. Please wait the TTA2 format, encoder v4."
+                               $info['tta']['major_version'] = 2;
+                               $info['avdataoffset'] += 20;
+
+                               $info['tta']['compression_level']   = getid3_lib::LittleEndian2Int(substr($ttaheader,  4,  2));
+                               $info['tta']['audio_format']        = getid3_lib::LittleEndian2Int(substr($ttaheader,  6,  2));
+                               $info['tta']['channels']            = getid3_lib::LittleEndian2Int(substr($ttaheader,  8,  2));
+                               $info['tta']['bits_per_sample']     = getid3_lib::LittleEndian2Int(substr($ttaheader, 10,  2));
+                               $info['tta']['sample_rate']         = getid3_lib::LittleEndian2Int(substr($ttaheader, 12,  4));
+                               $info['tta']['data_length']         = getid3_lib::LittleEndian2Int(substr($ttaheader, 16,  4));
+
+                               $info['audio']['encoder_options']   = '-e'.$info['tta']['compression_level'];
+                               $info['playtime_seconds']           = $info['tta']['data_length'] / $info['tta']['sample_rate'];
+                               break;
+
+                       case '1': // TTA v3.x
+                               // "This is a first stable release of the TTA format. It will be supported by the encoders v3 or higher."
+                               $info['tta']['major_version'] = 3;
+                               $info['avdataoffset'] += 26;
+
+                               $info['tta']['audio_format']        = getid3_lib::LittleEndian2Int(substr($ttaheader,  4,  2)); // getid3_riff::wFormatTagLookup()
+                               $info['tta']['channels']            = getid3_lib::LittleEndian2Int(substr($ttaheader,  6,  2));
+                               $info['tta']['bits_per_sample']     = getid3_lib::LittleEndian2Int(substr($ttaheader,  8,  2));
+                               $info['tta']['sample_rate']         = getid3_lib::LittleEndian2Int(substr($ttaheader, 10,  4));
+                               $info['tta']['data_length']         = getid3_lib::LittleEndian2Int(substr($ttaheader, 14,  4));
+                               $info['tta']['crc32_footer']        =                              substr($ttaheader, 18,  4);
+                               $info['tta']['seek_point']          = getid3_lib::LittleEndian2Int(substr($ttaheader, 22,  4));
+
+                               $info['playtime_seconds']           = $info['tta']['data_length'] / $info['tta']['sample_rate'];
+                               break;
+
+                       default:
+                               $this->error('This version of getID3() ['.$this->getid3->version().'] only knows how to handle TTA v1 and v2 - it may not work correctly with this file which appears to be TTA v'.$ttaheader{3});
+                               return false;
+                               break;
+               }
+
+               $info['audio']['encoder']         = 'TTA v'.$info['tta']['major_version'];
+               $info['audio']['bits_per_sample'] = $info['tta']['bits_per_sample'];
+               $info['audio']['sample_rate']     = $info['tta']['sample_rate'];
+               $info['audio']['channels']        = $info['tta']['channels'];
+               $info['audio']['bitrate']         = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
+
+               return true;
+       }
+
+}