getid3_matroska

232class getid3_matroska extends getid3_handler233{234	/**235	 * If true, do not return information about CLUSTER chunks, since there's a lot of them236	 * and they're not usually useful [default: TRUE].237	 *238	 * @var bool239	 */240	public $hide_clusters    = true;241 242	/**243	 * True to parse the whole file, not only header [default: FALSE].244	 *245	 * @var bool246	 */247	public $parse_whole_file = false;248 249	/*250	 * Private parser settings/placeholders.251	 */252	private $EBMLbuffer        = '';253	private $EBMLbuffer_offset = 0;254	private $EBMLbuffer_length = 0;255	private $current_offset    = 0;256	private $unuseful_elements = array(EBML_ID_CRC32, EBML_ID_VOID);257	private $scan_mode = MATROSKA_SCAN_HEADER;258 259	/**260	 * @return bool261	 */262	public function Analyze()263	{264		$info = &$this->getid3->info;265		$this->scan_mode = $this->parse_whole_file ? MATROSKA_SCAN_WHOLE_FILE : MATROSKA_SCAN_HEADER;266 267		// parse container268		try {269			$this->parseEBML($info);270		} catch (Exception $e) {271			$this->error('EBML parser: '.$e->getMessage());272		}273 274		$this->playtimeFromMetadata($info);275 276		// If there was no duration metadata, this might be an incomplete file or a streaming file277		// We need Cluster information so we can use their timecodes to estimate playtime.278		if (!isset($info['playtime_seconds']) && !$this->parse_whole_file) {279			// Scan the start and end of file for Clusters to estimate duration280			$this->scanStartEndForClusters($info);281		}282 283		if (isset($info['matroska']['cluster']) && is_array($info['matroska']['cluster'])) {284			if (!isset($info['playtime_seconds']) && !empty($info['matroska']['cluster'])) {285				// estimate playtime using clusters if not yet known286				$this->calculatePlaytimeFromClusters($info);287			}288 289			// Remove cluster information from output if hide_clusters is true290			// These could have been set during scanStartEndForClusters()291			if ($this->hide_clusters) {292				unset($info['matroska']['cluster']);293			}294		}295 296		// extract tags297		if (isset($info['matroska']['tags']) && is_array($info['matroska']['tags'])) {298			foreach ($info['matroska']['tags'] as $key => $infoarray) {299				$this->ExtractCommentsSimpleTag($infoarray);300			}301		}302 303		// process tracks304		if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {305			foreach ($info['matroska']['tracks']['tracks'] as $key => $trackarray) {306 307				$track_info = array();308				$track_info['dataformat'] = self::CodecIDtoCommonName($trackarray['CodecID']);309				$track_info['default'] = (isset($trackarray['FlagDefault']) ? $trackarray['FlagDefault'] : true);310				if (isset($trackarray['Name'])) { $track_info['name'] = $trackarray['Name']; }311