getid3_quicktime

24class getid3_quicktime extends getid3_handler25{26 27	/** audio-video.quicktime28	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata29	 *30	 * @var bool31	 */32	public $ReturnAtomData        = false;33 34	/** audio-video.quicktime35	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata36	 *37	 * @var bool38	 */39	public $ParseAllPossibleAtoms = false;40 41	/**42	 * @return bool43	 */44	public function Analyze() {45		$info = &$this->getid3->info;46 47		$info['fileformat'] = 'quicktime';48		$info['quicktime']['hinting']    = false;49		$info['quicktime']['controller'] = 'standard'; // may be overridden if 'ctyp' atom is present50 51		$this->fseek($info['avdataoffset']);52 53		$offset      = 0;54		$atomcounter = 0;55		$atom_data_read_buffer_size = $info['php_memory_limit'] ? round($info['php_memory_limit'] / 4) : $this->getid3->option_fread_buffer_size * 1024; // set read buffer to 25% of PHP memory limit (if one is specified), otherwise use option_fread_buffer_size [default: 32MB]56		while ($offset < $info['avdataend']) {57			if (!getid3_lib::intValueSupported($offset)) {58				$this->error('Unable to parse atom at offset '.$offset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions');59				break;60			}61			$this->fseek($offset);62			$AtomHeader = $this->fread(8);63 64			// https://github.com/JamesHeinrich/getID3/issues/38265			// Atom sizes are stored as 32-bit number in most cases, but sometimes (notably for "mdat")66			// a 64-bit value is required, in which case the normal 32-bit size field is set to 0x0000000167			// and the 64-bit "real" size value is the next 8 bytes.68			$atom_size_extended_bytes = 0;69			$atomsize = getid3_lib::BigEndian2Int(substr($AtomHeader, 0, 4));70			$atomname = substr($AtomHeader, 4, 4);71			if ($atomsize == 1) {72				$atom_size_extended_bytes = 8;73				$atomsize = getid3_lib::BigEndian2Int($this->fread($atom_size_extended_bytes));74			}75 76			if (($offset + $atomsize) > $info['avdataend']) {77				$info['quicktime'][$atomname]['name']   = $atomname;78				$info['quicktime'][$atomname]['size']   = $atomsize;79				$info['quicktime'][$atomname]['offset'] = $offset;80				$this->error('Atom at offset '.$offset.' claims to go beyond end-of-file (length: '.$atomsize.' bytes)');81				return false;82			}83			if ($atomsize == 0) {84				// Furthermore, for historical reasons the list of atoms is optionally85				// terminated by a 32-bit integer set to 0. If you are writing a program86				// to read user data atoms, you should allow for the terminating 0.87				$info['quicktime'][$atomname]['name']   = $atomname;88				$info['quicktime'][$atomname]['size']   = $atomsize;89				$info['quicktime'][$atomname]['offset'] = $offset;90				break;91			}92			$atomHierarchy = array();93			$parsedAtomData = $this->QuicktimeParseAtom($atomname, $atomsize, $this->fread(min($atomsize - $atom_size_extended_bytes, $atom_data_read_buffer_size)), $offset, $atomHierarchy, $this->ParseAllPossibleAtoms);94			$parsedAtomData['name']   = $atomname;95			$parsedAtomData['size']   = $atomsize;96			$parsedAtomData['offset'] = $offset;97			if ($atom_size_extended_bytes) {98				$parsedAtomData['xsize_bytes'] = $atom_size_extended_bytes;99			}100			if (in_array($atomname, array('uuid'))) {101				@$info['quicktime'][$atomname][] = $parsedAtomData;102			} else {103				$info['quicktime'][$atomname] = $parsedAtomData;