getid3_matroska

219class getid3_matroska extends getid3_handler220{221	/**222	 * If true, do not return information about CLUSTER chunks, since there's a lot of them223	 * and they're not usually useful [default: TRUE].224	 *225	 * @var bool226	 */227	public $hide_clusters    = true;228 229	/**230	 * True to parse the whole file, not only header [default: FALSE].231	 *232	 * @var bool233	 */234	public $parse_whole_file = false;235 236	/*237	 * Private parser settings/placeholders.238	 */239	private $EBMLbuffer        = '';240	private $EBMLbuffer_offset = 0;241	private $EBMLbuffer_length = 0;242	private $current_offset    = 0;243	private $unuseful_elements = array(EBML_ID_CRC32, EBML_ID_VOID);244 245	/**246	 * @return bool247	 */248	public function Analyze()249	{250		$info = &$this->getid3->info;251 252		// parse container253		try {254			$this->parseEBML($info);255		} catch (Exception $e) {256			$this->error('EBML parser: '.$e->getMessage());257		}258 259		// calculate playtime260		if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {261			foreach ($info['matroska']['info'] as $key => $infoarray) {262				if (isset($infoarray['Duration'])) {263					// TimecodeScale is how many nanoseconds each Duration unit is264					$info['playtime_seconds'] = $infoarray['Duration'] * ((isset($infoarray['TimecodeScale']) ? $infoarray['TimecodeScale'] : 1000000) / 1000000000);265					break;266				}267			}268		}269 270		// extract tags271		if (isset($info['matroska']['tags']) && is_array($info['matroska']['tags'])) {272			foreach ($info['matroska']['tags'] as $key => $infoarray) {273				$this->ExtractCommentsSimpleTag($infoarray);274			}275		}276 277		// process tracks278		if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {279			foreach ($info['matroska']['tracks']['tracks'] as $key => $trackarray) {280 281				$track_info = array();282				$track_info['dataformat'] = self::CodecIDtoCommonName($trackarray['CodecID']);283				$track_info['default'] = (isset($trackarray['FlagDefault']) ? $trackarray['FlagDefault'] : true);284				if (isset($trackarray['Name'])) { $track_info['name'] = $trackarray['Name']; }285 286				switch ($trackarray['TrackType']) {287 288					case 1: // Video289						$track_info['resolution_x'] = $trackarray['PixelWidth'];290						$track_info['resolution_y'] = $trackarray['PixelHeight'];291						$track_info['display_unit'] = self::displayUnit(isset($trackarray['DisplayUnit']) ? $trackarray['DisplayUnit'] : 0);292						$track_info['display_x']    = (isset($trackarray['DisplayWidth']) ? $trackarray['DisplayWidth'] : $trackarray['PixelWidth']);293						$track_info['display_y']    = (isset($trackarray['DisplayHeight']) ? $trackarray['DisplayHeight'] : $trackarray['PixelHeight']);294 295						if (isset($trackarray['PixelCropBottom']))  { $track_info['crop_bottom'] = $trackarray['PixelCropBottom']; }296						if (isset($trackarray['PixelCropTop']))     { $track_info['crop_top']    = $trackarray['PixelCropTop']; }297						if (isset($trackarray['PixelCropLeft']))    { $track_info['crop_left']   = $trackarray['PixelCropLeft']; }298						if (isset($trackarray['PixelCropRight']))   { $track_info['crop_right']  = $trackarray['PixelCropRight']; }