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