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<?php |
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///////////////////////////////////////////////////////////////// |
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/// getID3() by James Heinrich <[email protected]> // |
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// available at https://github.com/JamesHeinrich/getID3 // |
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// or https://www.getid3.org // |
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// or http://getid3.sourceforge.net // |
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// see readme.txt for more details // |
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///////////////////////////////////////////////////////////////// |
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// // |
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// module.audio.ivf.php // |
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// module for analyzing IVF audio-video files // |
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// dependencies: NONE // |
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// /// |
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///////////////////////////////////////////////////////////////// |
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if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers |
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exit; |
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} |
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class getid3_ivf extends getid3_handler |
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{ |
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/** |
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* @return bool |
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*/ |
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public function Analyze() { |
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$info = &$this->getid3->info; |
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$info['fileformat'] = 'ivf'; |
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$info['video']['dataformat'] = 'ivf'; |
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$this->fseek($info['avdataoffset']); |
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$IVFheader = $this->fread(32); |
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if (substr($IVFheader, 0, 4) == 'DKIF') { |
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// https://wiki.multimedia.cx/index.php/IVF |
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$info['ivf']['header']['signature'] = substr($IVFheader, 0, 4); |
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$info['ivf']['header']['version'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 4, 2)); // should be 0 |
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$info['ivf']['header']['headersize'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 6, 2)); |
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$info['ivf']['header']['fourcc'] = substr($IVFheader, 8, 4); |
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$info['ivf']['header']['resolution_x'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 12, 2)); |
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$info['ivf']['header']['resolution_y'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 14, 2)); |
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$info['ivf']['header']['timebase_numerator'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 16, 4)); |
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$info['ivf']['header']['timebase_denominator'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 20, 4)); |
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$info['ivf']['header']['frame_count'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 24, 4)); |
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//$info['ivf']['header']['reserved'] = substr($IVFheader, 28, 4); |
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$info['ivf']['header']['frame_rate'] = (float) $info['ivf']['header']['timebase_numerator'] / $info['ivf']['header']['timebase_denominator']; |
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if ($info['ivf']['header']['version'] > 0) { |
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$this->warning('Expecting IVF header version 0, found version '.$info['ivf']['header']['version'].', results may not be accurate'); |
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} |
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$info['video']['resolution_x'] = $info['ivf']['header']['resolution_x']; |
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$info['video']['resolution_y'] = $info['ivf']['header']['resolution_y']; |
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$info['video']['codec'] = $info['ivf']['header']['fourcc']; |
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$info['ivf']['frame_count'] = 0; |
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while (!$this->feof()) { |
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if ($frameheader = $this->fread(12)) { |
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$framesize = getid3_lib::LittleEndian2Int(substr($frameheader, 0, 4)); // size of frame in bytes (not including the 12-byte header) |
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$timestamp = getid3_lib::LittleEndian2Int(substr($frameheader, 4, 8)); // 64-bit presentation timestamp |
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$this->fseek($framesize, SEEK_CUR); |
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$info['ivf']['frame_count']++; |
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} |
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} |
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if ($info['ivf']['frame_count']) { |
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$info['playtime_seconds'] = $timestamp / 100000; |
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$info['video']['frame_rate'] = (float) $info['ivf']['frame_count'] / $info['playtime_seconds']; |
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} |
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} else { |
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$this->error('Expecting "DKIF" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($IVFheader, 0, 4)).'"'); |
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return false; |
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} |
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return true; |
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} |
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} |
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owncloud /
music
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