getid3_matroska::CodecIDtoCommonName

			$TargetTypeValue[50] = 'A:album/opera/concert ~ V:movie/episode/concert';       // the most common grouping level of music and video (equals to an episode for TV series)
			$TargetTypeValue[60] = 'A:edition/issue/volume/opus ~ V:season/sequel/volume';  // a list of lower levels grouped together
			$TargetTypeValue[70] = 'A:collection ~ V:collection';                           // the high hierarchy consisting of many different lower items
		}
		return (isset($TargetTypeValue[$target_type]) ? $TargetTypeValue[$target_type] : $target_type);
	}

	/**
	 * @param int $lacingtype
	 *
	 * @return string|int
	 */
	public static function BlockLacingType($lacingtype) {
		// http://matroska.org/technical/specs/index.html#block_structure
		static $BlockLacingType = array();
		if (empty($BlockLacingType)) {
			$BlockLacingType[0x00] = 'no lacing';
			$BlockLacingType[0x01] = 'Xiph lacing';
			$BlockLacingType[0x02] = 'fixed-size lacing';
			$BlockLacingType[0x03] = 'EBML lacing';
		}
		return (isset($BlockLacingType[$lacingtype]) ? $BlockLacingType[$lacingtype] : $lacingtype);
	}

	/**
	 * @param string $codecid
	 *
	 * @return string
	 */
	public static function CodecIDtoCommonName($codecid) {
		// http://www.matroska.org/technical/specs/codecid/index.html
		static $CodecIDlist = array();
		if (empty($CodecIDlist)) {
			$CodecIDlist['A_AAC']            = 'aac';
			$CodecIDlist['A_AAC/MPEG2/LC']   = 'aac';