Location: PHPKode > projects > Multimedia Files Scanner > getid3/getid3.quicktime.php
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <hide@address.com>               //
//  available at http://getid3.sourceforge.net                ///
//            or http://www.getid3.org                        ///
/////////////////////////////////////////////////////////////////
//                                                             //
// getid3.quicktime.php - part of getID3()                     //
// See getid3.readme.txt for more details                      //
//                                                             //
/////////////////////////////////////////////////////////////////

function getQuicktimeHeaderFilepointer(&$fd, &$ThisFileInfo) {

	$ThisFileInfo['fileformat']          = 'quicktime';
	$ThisFileInfo['audio']['dataformat'] = 'quicktime';
	$ThisFileInfo['video']['dataformat'] = 'quicktime';

	fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);

	$offset      = 0;
	$atomcounter = 0;

	while ($offset < $ThisFileInfo['avdataend']) {
		fseek($fd, $offset, SEEK_SET);
		$AtomHeader = fread($fd, 8);

		$atomsize = BigEndian2Int(substr($AtomHeader, 0, 4));
		$atomname =               substr($AtomHeader, 4, 4);
		$ThisFileInfo['quicktime']["$atomname"]['name']   = $atomname;
		$ThisFileInfo['quicktime']["$atomname"]['size']   = $atomsize;
		$ThisFileInfo['quicktime']["$atomname"]['offset'] = $offset;

		if (($offset + $atomsize) > $ThisFileInfo['avdataend']) {
			$ThisFileInfo['error'] .= "\n".'Atom at offset '.$offset.' claims to go beyond end-of-file (length: '.$atomsize.' bytes)';
			return false;
		}

		if ($atomsize == 0) {
			// Furthermore, for historical reasons the list of atoms is optionally
			// terminated by a 32-bit integer set to 0. If you are writing a program
			// to read user data atoms, you should allow for the terminating 0.
			break;
		}
		switch ($atomname) {
			case 'mdat': // Media DATa atom
				// 'mdat' contains the actual data for the audio/video
				if (!isset($ThisFileInfo['avdataend_tmp']) ||($ThisFileInfo['quicktime']["$atomname"]['size'] > ($ThisFileInfo['avdataend_tmp'] - $ThisFileInfo['avdataoffset']))) {

					$ThisFileInfo['avdataoffset'] = $ThisFileInfo['quicktime']["$atomname"]['offset'] + 8;
					$OldAVDataEnd                 = $ThisFileInfo['avdataend'];
					$ThisFileInfo['avdataend']    = $ThisFileInfo['quicktime']["$atomname"]['offset'] + $ThisFileInfo['quicktime']["$atomname"]['size'];

					require_once(GETID3_INCLUDEPATH.'getid3.mp3.php');
					if (MPEGaudioHeaderValid(MPEGaudioHeaderDecode(fread($fd, 4)))) {
						getOnlyMPEGaudioInfo($fd, $ThisFileInfo, $ThisFileInfo['avdataoffset'], false);
						if (isset($ThisFileInfo['mpeg']['audio'])) {
							$ThisFileInfo['audio']['dataformat']   = 'mp3';
							$ThisFileInfo['audio']['sample_rate']  = $ThisFileInfo['mpeg']['audio']['sample_rate'];
							$ThisFileInfo['audio']['channels']     = $ThisFileInfo['mpeg']['audio']['channels'];
							$ThisFileInfo['audio']['bitrate']      = $ThisFileInfo['mpeg']['audio']['bitrate'] * 1000;
							$ThisFileInfo['audio']['bitrate_mode'] = strtolower($ThisFileInfo['mpeg']['audio']['bitrate_mode']);
							$ThisFileInfo['bitrate']               = $ThisFileInfo['audio']['bitrate'];
						}
					}
					$ThisFileInfo['avdataend'] = $OldAVDataEnd;
					unset($OldAVDataEnd);

				}
				break;

			case 'free': // FREE space atom
			case 'skip': // SKIP atom
			case 'wide': // 64-bit expansion placeholder atom
				// 'free', 'skip' and 'wide' are just padding, contains no useful data at all
				break;

			default:
				$atomHierarchy = array();
				$ThisFileInfo['quicktime']["$atomname"] = QuicktimeParseAtom($atomname, $atomsize, fread($fd, $atomsize), $ThisFileInfo, $offset, $atomHierarchy);
				break;
		}

		$offset += $atomsize;
		$atomcounter++;
	}

	if (!empty($ThisFileInfo['avdataend_tmp'])) {
		// this value is assigned to a temp value and then erased because
		// otherwise any atoms beyond the 'mdat' atom would not get parsed
		$ThisFileInfo['avdataend'] = $ThisFileInfo['avdataend_tmp'];
		unset($ThisFileInfo['avdataend_tmp']);
	}

	// Quicktime tags have highest priority
	if (isset($ThisFileInfo['quicktime']['comments'])) {
		CopyFormatCommentsToRootComments($ThisFileInfo['quicktime']['comments'], $ThisFileInfo, true, true, true);
		// add tag to array of tags
		$ThisFileInfo['tags'][] = 'quicktime';
	}

	if (!isset($ThisFileInfo['bitrate']) && isset($ThisFileInfo['playtime_seconds'])) {
		$ThisFileInfo['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
	}
	if (isset($ThisFileInfo['bitrate']) && !isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['quicktime']['video'])) {
		$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['bitrate'];
	}

	return true;
}

function QuicktimeParseAtom($atomname, $atomsize, $atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy) {
	// http://developer.apple.com/techpubs/quicktime/qtdevdocs/APIREF/INDEX/atomalphaindex.htm

	array_push($atomHierarchy, $atomname);
	$atomstructure['hierarchy'] = implode(' ', $atomHierarchy);
	$atomstructure['name']      = $atomname;
	$atomstructure['size']      = $atomsize;
	$atomstructure['offset']    = $baseoffset;

	switch ($atomname) {
		case 'moov': // MOVie container atom
		case 'trak': // TRAcK container atom
		case 'clip': // CLIPping container atom
		case 'matt': // track MATTe container atom
		case 'edts': // EDiTS container atom
		case 'tref': // Track REFerence container atom
		case 'mdia': // MeDIA container atom
		case 'minf': // Media INFormation container atom
		case 'dinf': // Data INFormation container atom
		case 'udta': // User DaTA container atom
		case 'stbl': // Sample TaBLe container atom
		case 'cmov': // Compressed MOVie container atom
		case 'rmra': // Reference Movie Record Atom
		case 'rmda': // Reference Movie Descriptor Atom
			$atomstructure['subatoms'] = QuicktimeParseContainerAtom($atomdata, $ThisFileInfo, $baseoffset + 8, $atomHierarchy);
			break;


		case '©cpy':
		case '©day':
		case '©dir':
		case '©ed1':
		case '©ed2':
		case '©ed3':
		case '©ed4':
		case '©ed5':
		case '©ed6':
		case '©ed7':
		case '©ed8':
		case '©ed9':
		case '©fmt':
		case '©inf':
		case '©prd':
		case '©prf':
		case '©req':
		case '©src':
		case '©wrt':
		case '©nam':
		case '©cmt':
		case '©wrn':
		case '©hst':
		case '©mak':
		case '©mod':
		case '©PRD':
		case '©swr':
		case '©aut':
		case '©ART':
		case '©trk':
		case '©alb':
		case '©com':
		case '©gen':
		case '©ope':
		case '©url':
		case '©enc':
			$atomstructure['data_length'] = BigEndian2Int(substr($atomdata,  0, 2));
			$atomstructure['language_id'] = BigEndian2Int(substr($atomdata,  2, 2));
			$atomstructure['data']        =               substr($atomdata,  4);

			$atomstructure['language']    = QuicktimeLanguageLookup($atomstructure['language_id']);
			$handyatomtranslatorarray['©cpy'] = 'copyright';
			$handyatomtranslatorarray['©day'] = 'creation_date';
			$handyatomtranslatorarray['©dir'] = 'director';
			$handyatomtranslatorarray['©ed1'] = 'edit1';
			$handyatomtranslatorarray['©ed2'] = 'edit2';
			$handyatomtranslatorarray['©ed3'] = 'edit3';
			$handyatomtranslatorarray['©ed4'] = 'edit4';
			$handyatomtranslatorarray['©ed5'] = 'edit5';
			$handyatomtranslatorarray['©ed6'] = 'edit6';
			$handyatomtranslatorarray['©ed7'] = 'edit7';
			$handyatomtranslatorarray['©ed8'] = 'edit8';
			$handyatomtranslatorarray['©ed9'] = 'edit9';
			$handyatomtranslatorarray['©fmt'] = 'format';
			$handyatomtranslatorarray['©inf'] = 'information';
			$handyatomtranslatorarray['©prd'] = 'producer';
			$handyatomtranslatorarray['©prf'] = 'performers';
			$handyatomtranslatorarray['©req'] = 'system_requirements';
			$handyatomtranslatorarray['©src'] = 'source_credit';
			$handyatomtranslatorarray['©wrt'] = 'writer';

			// http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
			$handyatomtranslatorarray['©nam'] = 'title';
			$handyatomtranslatorarray['©cmt'] = 'comment';
			$handyatomtranslatorarray['©wrn'] = 'warning';
			$handyatomtranslatorarray['©hst'] = 'host_computer';
			$handyatomtranslatorarray['©mak'] = 'make';
			$handyatomtranslatorarray['©mod'] = 'model';
			$handyatomtranslatorarray['©PRD'] = 'product';
			$handyatomtranslatorarray['©swr'] = 'software';
			$handyatomtranslatorarray['©aut'] = 'author';
			$handyatomtranslatorarray['©ART'] = 'artist';
			$handyatomtranslatorarray['©trk'] = 'track';
			$handyatomtranslatorarray['©alb'] = 'album';
			$handyatomtranslatorarray['©com'] = 'comment';
			$handyatomtranslatorarray['©gen'] = 'genre';
			$handyatomtranslatorarray['©ope'] = 'composer';
			$handyatomtranslatorarray['©url'] = 'url';
			$handyatomtranslatorarray['©enc'] = 'encoder';
			if (isset($handyatomtranslatorarray["$atomname"])) {
				$ThisFileInfo['quicktime']['comments'][$handyatomtranslatorarray["$atomname"]][] = $atomstructure['data'];
			}
			break;


		case 'play': // auto-PLAY atom
			$atomstructure['autoplay']            = (bool) BigEndian2Int(substr($atomdata,  0, 1));

			$ThisFileInfo['quicktime']['autoplay'] = $atomstructure['autoplay'];
			break;


		case 'WLOC': // Window LOCation atom
			$atomstructure['location_x']  = BigEndian2Int(substr($atomdata,  0, 2));
			$atomstructure['location_y']  = BigEndian2Int(substr($atomdata,  2, 2));
			break;


		case 'LOOP': // LOOPing atom
		case 'SelO': // play SELection Only atom
		case 'AllF': // play ALL Frames atom
			$atomstructure['data'] = BigEndian2Int($atomdata);
			break;


		case 'name': //
		case 'MCPS': // Media Cleaner PRo
		case '@PRM': // adobe PReMiere version
		case '@PRQ': // adobe PRemiere Quicktime version
			$atomstructure['data'] = $atomdata;
			break;


		case 'cmvd': // Compressed MooV Data atom
			$ThisFileInfo['warning'] .= "\n".'Compressed Quicktime MOOV Data atoms ("cmvd") not supported';
			break;


		case 'dcom': // Data COMpression atom
			$atomstructure['compression_id']   = $atomdata;
			$atomstructure['compression_text'] = QuicktimeDCOMLookup($atomdata);
			break;


		case 'rdrf': // Reference movie Data ReFerence atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3));
			$atomstructure['flags']['internal_data']                                = (bool) ($atomstructure['flags_raw'] & 0x000001);

			$atomstructure['reference_type_name']                               =               substr($atomdata,  4, 4);
			$atomstructure['reference_length']                                  = BigEndian2Int(substr($atomdata,  8, 4));
			switch ($atomstructure['reference_type_name']) {
				case 'url ':
					$atomstructure['url']                                       =  NoNullString(substr($atomdata, 12));
					break;

				case 'alis':
					$atomstructure['file_alias']                                =               substr($atomdata, 12);
					break;

				case 'rsrc':
					$atomstructure['resource_alias']                            =               substr($atomdata, 12);
					break;

				default:
					$atomstructure['data']                                      =               substr($atomdata, 12);
					break;
			}
			break;


		case 'rmqu': // Reference Movie QUality atom
			$atomstructure['movie_quality']                                         = BigEndian2Int($atomdata);
			break;


		case 'rmcs': // Reference Movie Cpu Speed atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['cpu_speed_rating']                                      = BigEndian2Int(substr($atomdata,  4, 2));
			break;


		case 'rmvc': // Reference Movie Version Check atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['gestalt_selector']                                      =               substr($atomdata,  4, 4);
			$atomstructure['gestalt_value_mask']                                    = BigEndian2Int(substr($atomdata,  8, 4));
			$atomstructure['gestalt_value']                                         = BigEndian2Int(substr($atomdata, 12, 4));
			$atomstructure['gestalt_check_type']                                    = BigEndian2Int(substr($atomdata, 14, 2));
			break;


		case 'rmcd': // Reference Movie Component check atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['component_type']                                        =               substr($atomdata,  4, 4);
			$atomstructure['component_subtype']                                     =               substr($atomdata,  8, 4);
			$atomstructure['component_manufacturer']                                =               substr($atomdata, 12, 4);
			$atomstructure['component_flags_raw']                                   = BigEndian2Int(substr($atomdata, 16, 4));
			$atomstructure['component_flags_mask']                                  = BigEndian2Int(substr($atomdata, 20, 4));
			$atomstructure['component_min_version']                                 = BigEndian2Int(substr($atomdata, 24, 4));
			break;


		case 'rmdr': // Reference Movie Data Rate atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['data_rate']                                             = BigEndian2Int(substr($atomdata,  4, 4));

			$atomstructure['data_rate_bps']                                         = $atomstructure['data_rate'] * 10;
			break;


		case 'rmla': // Reference Movie Language Atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['language_id']                                           = BigEndian2Int(substr($atomdata,  4, 2));

			$atomstructure['language']                                              = QuicktimeLanguageLookup($atomstructure['language_id']);
			break;


		case 'rmla': // Reference Movie Language Atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['track_id']                                              = BigEndian2Int(substr($atomdata,  4, 2));
			break;


		case 'stsd': // Sample Table Sample Description atom
			$atomstructure['version']                                                = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                              = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries']                                         = BigEndian2Int(substr($atomdata,  4, 4));
			$stsdEntriesDataOffset = 8;
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['sample_description_table'][$i]['size']             = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 4));
				$stsdEntriesDataOffset += 4;
				$atomstructure['sample_description_table'][$i]['data_format']      =               substr($atomdata, $stsdEntriesDataOffset, 4);
				$stsdEntriesDataOffset += 4;
				$atomstructure['sample_description_table'][$i]['reserved']         = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 6));
				$stsdEntriesDataOffset += 6;
				$atomstructure['sample_description_table'][$i]['reference_index']  = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 2));
				$stsdEntriesDataOffset += 2;
				$atomstructure['sample_description_table'][$i]['data']             =               substr($atomdata, $stsdEntriesDataOffset, ($atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2));
				$stsdEntriesDataOffset += ($atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2);

				$atomstructure['sample_description_table'][$i]['encoder_version']  = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  0, 2));
				$atomstructure['sample_description_table'][$i]['encoder_revision'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  2, 2));
				$atomstructure['sample_description_table'][$i]['encoder_vendor']   =               substr($atomstructure['sample_description_table'][$i]['data'],  4, 4);

				if ($atomstructure['sample_description_table'][$i]['encoder_vendor'] == chr(0).chr(0).chr(0).chr(0)) {

					// audio atom
					$atomstructure['sample_description_table'][$i]['audio_channels']       =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  8,  2));
					$atomstructure['sample_description_table'][$i]['audio_bit_depth']      =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 10,  2));
					$atomstructure['sample_description_table'][$i]['audio_compression_id'] =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12,  2));
					$atomstructure['sample_description_table'][$i]['audio_packet_size']    =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 14,  2));
					$atomstructure['sample_description_table'][$i]['audio_sample_rate']    = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 16,  4));

					$ThisFileInfo['quicktime']['audio']['codec']       = QuicktimeAudioCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
					$ThisFileInfo['quicktime']['audio']['sample_rate'] = $atomstructure['sample_description_table'][$i]['audio_sample_rate'];
					$ThisFileInfo['quicktime']['audio']['channels']    = $atomstructure['sample_description_table'][$i]['audio_channels'];
					$ThisFileInfo['quicktime']['audio']['bit_depth']   = $atomstructure['sample_description_table'][$i]['audio_bit_depth'];
					$ThisFileInfo['audio']['codec']                    = $ThisFileInfo['quicktime']['audio']['codec'];
					$ThisFileInfo['audio']['sample_rate']              = $ThisFileInfo['quicktime']['audio']['sample_rate'];
					$ThisFileInfo['audio']['channels']                 = $ThisFileInfo['quicktime']['audio']['channels'];
					$ThisFileInfo['audio']['bits_per_sample']          = $ThisFileInfo['quicktime']['audio']['bit_depth'];
					if ($ThisFileInfo['audio']['codec'] == 'raw PCM') {
						$ThisFileInfo['audio']['lossless'] = true;
					} else {
						$ThisFileInfo['audio']['lossless'] = false;
					}

				} else {

					// video atom
					$atomstructure['sample_description_table'][$i]['video_temporal_quality']  =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  8,  4));
					$atomstructure['sample_description_table'][$i]['video_spatial_quality']   =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12,  4));
					$atomstructure['sample_description_table'][$i]['video_frame_width']       =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 16,  2));
					$atomstructure['sample_description_table'][$i]['video_frame_height']      =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 18,  2));
					$atomstructure['sample_description_table'][$i]['video_resolution_x']      = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 20,  4));
					$atomstructure['sample_description_table'][$i]['video_resolution_y']      = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 24,  4));
					$atomstructure['sample_description_table'][$i]['video_data_size']         =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 28,  4));
					$atomstructure['sample_description_table'][$i]['video_frame_count']       =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 32,  2));
					$atomstructure['sample_description_table'][$i]['video_encoder_name_len']  =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 34,  1));
					$atomstructure['sample_description_table'][$i]['video_encoder_name']      =                 substr($atomstructure['sample_description_table'][$i]['data'], 35, $atomstructure['sample_description_table'][$i]['video_encoder_name_len']);
					$atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 66,  2));
					$atomstructure['sample_description_table'][$i]['video_color_table_id']    =   BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 68,  2));

					$atomstructure['sample_description_table'][$i]['video_pixel_color_type']  = (($atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] > 32) ? 'grayscale' : 'color');
					$atomstructure['sample_description_table'][$i]['video_pixel_color_name']  = QuicktimeColorNameLookup($atomstructure['sample_description_table'][$i]['video_pixel_color_depth']);

					if ($atomstructure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
						//$ThisFileInfo['quicktime']['video']['codec']            = QuicktimeVideoCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
						$ThisFileInfo['quicktime']['video']['codec']            = $atomstructure['sample_description_table'][$i]['video_encoder_name'];
						$ThisFileInfo['quicktime']['video']['color_depth']      = $atomstructure['sample_description_table'][$i]['video_pixel_color_depth'];
						$ThisFileInfo['quicktime']['video']['color_depth_name'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_name'];

						$ThisFileInfo['video']['codec']           = $ThisFileInfo['quicktime']['video']['codec'];
						$ThisFileInfo['video']['bits_per_sample'] = $ThisFileInfo['quicktime']['video']['color_depth'];
					}
					$ThisFileInfo['video']['lossless'] = false;

				}
				switch ($atomstructure['sample_description_table'][$i]['data_format']) {
					case 'mp4a':
						$ThisFileInfo['fileformat'] = 'mp4';
						$ThisFileInfo['mime_type']  = 'audio/mp4';
						unset($ThisFileInfo['video']['dataformat']);
						break;

					default:
						// do nothing
						break;
				}
				unset($atomstructure['sample_description_table'][$i]['data']);
			}
			break;


		case 'stts': // Sample Table Time-to-Sample atom
			$atomstructure['version']                                         = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                       = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries']                                  = BigEndian2Int(substr($atomdata,  4, 4));
			$sttsEntriesDataOffset = 8;
			$FrameRateCalculatorArray = array();
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['time_to_sample_table'][$i]['sample_count']    = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
				$sttsEntriesDataOffset += 4;
				$atomstructure['time_to_sample_table'][$i]['sample_duration'] = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
				$sttsEntriesDataOffset += 4;

				safe_inc($FrameRateCalculatorArray[($ThisFileInfo['quicktime']['time_scale'] / $atomstructure['time_to_sample_table'][$i]['sample_duration'])], $atomstructure['time_to_sample_table'][$i]['sample_count']);
			}
			$sttsFramesTotal  = 0;
			$sttsSecondsTotal = 0;
			foreach ($FrameRateCalculatorArray as $frames_per_second => $frame_count) {
				if (($frames_per_second > 60) || ($frames_per_second == 0)) {
					// not video FPS information, probably audio information
					$sttsFramesTotal  = 0;
					$sttsSecondsTotal = 0;
					break;
				}
				$sttsFramesTotal  += $frame_count;
				$sttsSecondsTotal += $frame_count / $frames_per_second;
			}
			if (($sttsFramesTotal > 0) && ($sttsSecondsTotal > 0)) {
				$ThisFileInfo['video']['frame_rate'] = $sttsFramesTotal / $sttsSecondsTotal;
			}
			break;


		case 'stss': // Sample Table Sync Sample (key frames) atom
			$atomstructure['version']                        = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                      = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries']                 = BigEndian2Int(substr($atomdata,  4, 4));
			$stssEntriesDataOffset = 8;
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['time_to_sample_table'][$i] = BigEndian2Int(substr($atomdata, $stssEntriesDataOffset, 4));
				$stssEntriesDataOffset += 4;
			}
			break;


		case 'stsc': // Sample Table Sample-to-Chunk atom
			$atomstructure['version']                                               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                                             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries']                                        = BigEndian2Int(substr($atomdata,  4, 4));
			$stscEntriesDataOffset = 8;
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['sample_to_chunk_table'][$i]['first_chunk']        = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
				$stscEntriesDataOffset += 4;
				$atomstructure['sample_to_chunk_table'][$i]['samples_per_chunk']  = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
				$stscEntriesDataOffset += 4;
				$atomstructure['sample_to_chunk_table'][$i]['sample_description'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
				$stscEntriesDataOffset += 4;
			}
			break;


		case 'stsz': // Sample Table SiZe atom
			$atomstructure['version']                         = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                       = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['sample_size']                     = BigEndian2Int(substr($atomdata,  4, 4));
			$atomstructure['number_entries']                  = BigEndian2Int(substr($atomdata,  8, 4));
			$stszEntriesDataOffset = 12;
			if ($atomstructure['sample_size'] == 0) {
				for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
					$atomstructure['sample_size_table'][$i] = BigEndian2Int(substr($atomdata, $stszEntriesDataOffset, 4));
					$stszEntriesDataOffset += 4;
				}
			}
			break;


		case 'stco': // Sample Table Chunk Offset atom
			$atomstructure['version']                          = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']                        = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries']                   = BigEndian2Int(substr($atomdata,  4, 4));
			$stcoEntriesDataOffset = 8;
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['chunk_offset_table'][$i] = BigEndian2Int(substr($atomdata, $stcoEntriesDataOffset, 4));
				$stcoEntriesDataOffset += 4;
			}
			break;


		case 'dref': // Data REFerence atom
			$atomstructure['version']        = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']      = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata,  4, 4));
			$drefDataOffset = 8;
			for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
				$atomstructure['data_references'][$i]['size']                    = BigEndian2Int(substr($atomdata, $drefDataOffset, 4));
				$drefDataOffset += 4;
				$atomstructure['data_references'][$i]['type']                    =               substr($atomdata, $drefDataOffset, 4);
				$drefDataOffset += 4;
				$atomstructure['data_references'][$i]['version']                 = BigEndian2Int(substr($atomdata,  $drefDataOffset, 1));
				$drefDataOffset += 1;
				$atomstructure['data_references'][$i]['flags_raw']               = BigEndian2Int(substr($atomdata,  $drefDataOffset, 3)); // hardcoded: 0x000
				$drefDataOffset += 3;
				$atomstructure['data_references'][$i]['data']                    =               substr($atomdata, $drefDataOffset, ($atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3));
				$drefDataOffset += ($atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3);

				$atomstructure['data_references'][$i]['flags']['self_reference'] = (bool) ($atomstructure['data_references'][$i]['flags_raw'] & 0x001);
			}
			break;


		case 'gmin': // base Media INformation atom
			$atomstructure['version']                = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']              = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['graphics_mode']          = BigEndian2Int(substr($atomdata,  4, 2));
			$atomstructure['opcolor_red']            = BigEndian2Int(substr($atomdata,  6, 2));
			$atomstructure['opcolor_green']          = BigEndian2Int(substr($atomdata,  8, 2));
			$atomstructure['opcolor_blue']           = BigEndian2Int(substr($atomdata, 10, 2));
			$atomstructure['balance']                = BigEndian2Int(substr($atomdata, 12, 2));
			$atomstructure['reserved']               = BigEndian2Int(substr($atomdata, 14, 2));
			break;


		case 'smhd': // Sound Media information HeaDer atom
			$atomstructure['version']                = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']              = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['balance']                = BigEndian2Int(substr($atomdata,  4, 2));
			$atomstructure['reserved']               = BigEndian2Int(substr($atomdata,  6, 2));
			break;


		case 'vmhd': // Video Media information HeaDer atom
			$atomstructure['version']                = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']              = BigEndian2Int(substr($atomdata,  1, 3));
			$atomstructure['graphics_mode']          = BigEndian2Int(substr($atomdata,  4, 2));
			$atomstructure['opcolor_red']            = BigEndian2Int(substr($atomdata,  6, 2));
			$atomstructure['opcolor_green']          = BigEndian2Int(substr($atomdata,  8, 2));
			$atomstructure['opcolor_blue']           = BigEndian2Int(substr($atomdata, 10, 2));

			$atomstructure['flags']['no_lean_ahead'] = (bool) ($atomstructure['flags_raw'] & 0x001);
			break;


		case 'hdlr': // HanDLeR reference atom
			$atomstructure['version']                = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']              = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['component_type']         =               substr($atomdata,  4, 4);
			$atomstructure['component_subtype']      =               substr($atomdata,  8, 4);
			$atomstructure['component_manufacturer'] =               substr($atomdata, 12, 4);
			$atomstructure['component_flags_raw']    = BigEndian2Int(substr($atomdata, 16, 4));
			$atomstructure['component_flags_mask']   = BigEndian2Int(substr($atomdata, 20, 4));
			$atomstructure['component_name']         = Pascal2String(substr($atomdata, 24));
			break;


		case 'mdhd': // MeDia HeaDer atom
			$atomstructure['version']               = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']             = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['creation_time']         = BigEndian2Int(substr($atomdata,  4, 4));
			$atomstructure['modify_time']           = BigEndian2Int(substr($atomdata,  8, 4));
			$atomstructure['time_scale']            = BigEndian2Int(substr($atomdata, 12, 4));
			$atomstructure['duration']              = BigEndian2Int(substr($atomdata, 16, 4));
			$atomstructure['language_id']           = BigEndian2Int(substr($atomdata, 20, 2));
			$atomstructure['quality']               = BigEndian2Int(substr($atomdata, 22, 2));

			if ($atomstructure['time_scale'] == 0) {
				$ThisFileInfo['error'] .= "\n".'Corrupt Quicktime file: mdhd.time_scale == zero';
				return false;
			}
			$atomstructure['creation_time_unix']    = DateMac2Unix($atomstructure['creation_time']);
			$atomstructure['modify_time_unix']      = DateMac2Unix($atomstructure['modify_time']);
			$atomstructure['playtime_seconds']      = $atomstructure['duration'] / $atomstructure['time_scale'];
			$atomstructure['language']              = QuicktimeLanguageLookup($atomstructure['language_id']);
			break;


		case 'pnot': // Preview atom
			$atomstructure['modification_date']      = BigEndian2Int(substr($atomdata,  0, 4)); // "standard Macintosh format"
			$atomstructure['version_number']         = BigEndian2Int(substr($atomdata,  4, 2)); // hardcoded: 0x00
			$atomstructure['atom_type']              =               substr($atomdata,  6, 4);        // usually: 'PICT'
			$atomstructure['atom_index']             = BigEndian2Int(substr($atomdata, 10, 2)); // usually: 0x01

			$atomstructure['modification_date_unix'] = DateMac2Unix($atomstructure['modification_date']);
			break;


		case 'crgn': // Clipping ReGioN atom
			$atomstructure['region_size']   = BigEndian2Int(substr($atomdata,  0, 2)); // The Region size, Region boundary box,
			$atomstructure['boundary_box']  = BigEndian2Int(substr($atomdata,  2, 8)); // and Clipping region data fields
			$atomstructure['clipping_data'] =               substr($atomdata, 10);           // constitute a QuickDraw region.
			break;


		case 'load': // track LOAD settings atom
			$atomstructure['preload_start_time']             = BigEndian2Int(substr($atomdata,  0, 4));
			$atomstructure['preload_duration']               = BigEndian2Int(substr($atomdata,  4, 4));
			$atomstructure['preload_flags_raw']              = BigEndian2Int(substr($atomdata,  8, 4));
			$atomstructure['default_hints_raw']              = BigEndian2Int(substr($atomdata, 12, 4));

			$atomstructure['default_hints']['double_buffer'] = (bool) ($atomstructure['default_hints_raw'] & 0x0020);
			$atomstructure['default_hints']['high_quality']  = (bool) ($atomstructure['default_hints_raw'] & 0x0100);
			break;


		case 'tmcd': // TiMe CoDe atom
		case 'chap': // CHAPter list atom
		case 'sync': // SYNChronization atom
		case 'scpt': // tranSCriPT atom
		case 'ssrc': // non-primary SouRCe atom
			for ($i = 0; $i < (strlen($atomdata) % 4); $i++) {
				$atomstructure['track_id'][$i] = BigEndian2Int(substr($atomdata, $i * 4, 4));
			}
			break;


		case 'elst': // Edit LiST atom
			$atomstructure['version']        = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']      = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata,  4, 4));
			for ($i = 0; $i < $atomstructure['number_entries']; $i++ ) {
				$atomstructure['edit_list'][$i]['track_duration'] = BigEndian2Int(substr($atomdata, 8 + ($i * 12) + 0, 4));
				$atomstructure['edit_list'][$i]['media_time']     = BigEndian2Int(substr($atomdata, 8 + ($i * 12) + 4, 4));
				$atomstructure['edit_list'][$i]['media_rate']     = BigEndian2Int(substr($atomdata, 8 + ($i * 12) + 8, 4));
			}
			break;


		case 'kmat': // compressed MATte atom
			$atomstructure['version']        = BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']      = BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x000
			$atomstructure['matte_data_raw'] =               substr($atomdata,  4);
			break;


		case 'ctab': // Color TABle atom
			$atomstructure['color_table_seed']   = BigEndian2Int(substr($atomdata,  0, 4)); // hardcoded: 0x00000000
			$atomstructure['color_table_flags']  = BigEndian2Int(substr($atomdata,  4, 2)); // hardcoded: 0x8000
			$atomstructure['color_table_size']   = BigEndian2Int(substr($atomdata,  6, 2)) + 1;
			for ($colortableentry = 0; $colortableentry < $atomstructure['color_table_size']; $colortableentry++) {
				$atomstructure['color_table'][$colortableentry]['alpha'] = BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 0, 2));
				$atomstructure['color_table'][$colortableentry]['red']   = BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 2, 2));
				$atomstructure['color_table'][$colortableentry]['green'] = BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 4, 2));
				$atomstructure['color_table'][$colortableentry]['blue']  = BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 6, 2));
			}
			break;


		case 'mvhd': // MoVie HeaDer atom
			$atomstructure['version']               =   BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']             =   BigEndian2Int(substr($atomdata,  1, 3));
			$atomstructure['creation_time']         =   BigEndian2Int(substr($atomdata,  4, 4));
			$atomstructure['modify_time']           =   BigEndian2Int(substr($atomdata,  8, 4));
			$atomstructure['time_scale']            =   BigEndian2Int(substr($atomdata, 12, 4));
			$atomstructure['duration']              =   BigEndian2Int(substr($atomdata, 16, 4));
			$atomstructure['preferred_rate']        = FixedPoint16_16(substr($atomdata, 20, 4));
			$atomstructure['preferred_volume']      =   FixedPoint8_8(substr($atomdata, 24, 2));
			$atomstructure['reserved']              =                 substr($atomdata, 26, 10);
			$atomstructure['matrix_a']              = FixedPoint16_16(substr($atomdata, 36, 4));
			$atomstructure['matrix_b']              = FixedPoint16_16(substr($atomdata, 40, 4));
			$atomstructure['matrix_u']              = FixedPoint16_16(substr($atomdata, 44, 4));
			$atomstructure['matrix_c']              = FixedPoint16_16(substr($atomdata, 48, 4));
			$atomstructure['matrix_v']              = FixedPoint16_16(substr($atomdata, 52, 4));
			$atomstructure['matrix_d']              = FixedPoint16_16(substr($atomdata, 56, 4));
			$atomstructure['matrix_x']              =  FixedPoint2_30(substr($atomdata, 60, 4));
			$atomstructure['matrix_y']              =  FixedPoint2_30(substr($atomdata, 64, 4));
			$atomstructure['matrix_w']              =  FixedPoint2_30(substr($atomdata, 68, 4));
			$atomstructure['preview_time']          =   BigEndian2Int(substr($atomdata, 72, 4));
			$atomstructure['preview_duration']      =   BigEndian2Int(substr($atomdata, 76, 4));
			$atomstructure['poster_time']           =   BigEndian2Int(substr($atomdata, 80, 4));
			$atomstructure['selection_time']        =   BigEndian2Int(substr($atomdata, 84, 4));
			$atomstructure['selection_duration']    =   BigEndian2Int(substr($atomdata, 88, 4));
			$atomstructure['current_time']          =   BigEndian2Int(substr($atomdata, 92, 4));
			$atomstructure['next_track_id']         =   BigEndian2Int(substr($atomdata, 96, 4));

			if ($atomstructure['time_scale'] == 0) {
				$ThisFileInfo['error'] .= "\n".'Corrupt Quicktime file: mvhd.time_scale == zero';
				return false;
			}
			$atomstructure['creation_time_unix']    = DateMac2Unix($atomstructure['creation_time']);
			$atomstructure['modify_time_unix']      = DateMac2Unix($atomstructure['modify_time']);
			$ThisFileInfo['quicktime']['time_scale'] = $atomstructure['time_scale'];
			$ThisFileInfo['playtime_seconds']        = $atomstructure['duration'] / $atomstructure['time_scale'];
			break;


		case 'tkhd': // TracK HeaDer atom
			$atomstructure['version']             =   BigEndian2Int(substr($atomdata,  0, 1));
			$atomstructure['flags_raw']           =   BigEndian2Int(substr($atomdata,  1, 3));
			$atomstructure['creation_time']       =   BigEndian2Int(substr($atomdata,  4, 4));
			$atomstructure['modify_time']         =   BigEndian2Int(substr($atomdata,  8, 4));
			$atomstructure['trackid']             =   BigEndian2Int(substr($atomdata, 12, 4));
			$atomstructure['reserved1']           =   BigEndian2Int(substr($atomdata, 16, 4));
			$atomstructure['duration']            =   BigEndian2Int(substr($atomdata, 20, 4));
			$atomstructure['reserved2']           =   BigEndian2Int(substr($atomdata, 24, 8));
			$atomstructure['layer']               =   BigEndian2Int(substr($atomdata, 32, 2));
			$atomstructure['alternate_group']     =   BigEndian2Int(substr($atomdata, 34, 2));
			$atomstructure['volume']              =   FixedPoint8_8(substr($atomdata, 36, 2));
			$atomstructure['reserved3']           =   BigEndian2Int(substr($atomdata, 38, 2));
			$atomstructure['matrix_a']            = FixedPoint16_16(substr($atomdata, 40, 4));
			$atomstructure['matrix_b']            = FixedPoint16_16(substr($atomdata, 44, 4));
			$atomstructure['matrix_u']            = FixedPoint16_16(substr($atomdata, 48, 4));
			$atomstructure['matrix_c']            = FixedPoint16_16(substr($atomdata, 52, 4));
			$atomstructure['matrix_v']            = FixedPoint16_16(substr($atomdata, 56, 4));
			$atomstructure['matrix_d']            = FixedPoint16_16(substr($atomdata, 60, 4));
			$atomstructure['matrix_x']            =  FixedPoint2_30(substr($atomdata, 64, 4));
			$atomstructure['matrix_y']            =  FixedPoint2_30(substr($atomdata, 68, 4));
			$atomstructure['matrix_w']            =  FixedPoint2_30(substr($atomdata, 72, 4));
			$atomstructure['width']               = FixedPoint16_16(substr($atomdata, 76, 4));
			$atomstructure['height']              = FixedPoint16_16(substr($atomdata, 80, 4));

			$atomstructure['flags']['enabled']    = (bool) ($atomstructure['flags_raw'] & 0x0001);
			$atomstructure['flags']['in_movie']   = (bool) ($atomstructure['flags_raw'] & 0x0002);
			$atomstructure['flags']['in_preview'] = (bool) ($atomstructure['flags_raw'] & 0x0004);
			$atomstructure['flags']['in_poster']  = (bool) ($atomstructure['flags_raw'] & 0x0008);
			$atomstructure['creation_time_unix']  = DateMac2Unix($atomstructure['creation_time']);
			$atomstructure['modify_time_unix']    = DateMac2Unix($atomstructure['modify_time']);

			if (!isset($ThisFileInfo['video']['resolution_x']) || !isset($ThisFileInfo['video']['resolution_y'])) {
				$ThisFileInfo['video']['resolution_x']      = $atomstructure['width'];
				$ThisFileInfo['video']['resolution_y']      = $atomstructure['height'];
			}
			$ThisFileInfo['video']['resolution_x']                       = max($ThisFileInfo['video']['resolution_x'], $atomstructure['width']);
			$ThisFileInfo['video']['resolution_y']                       = max($ThisFileInfo['video']['resolution_y'], $atomstructure['height']);
			if (!empty($ThisFileInfo['video']['resolution_x']) && !empty($ThisFileInfo['video']['resolution_y'])) {
				$ThisFileInfo['quicktime']['video']['resolution_x'] = $ThisFileInfo['video']['resolution_x'];
				$ThisFileInfo['quicktime']['video']['resolution_y'] = $ThisFileInfo['video']['resolution_y'];
			} else {
				unset($ThisFileInfo['video']['resolution_x']);
				unset($ThisFileInfo['video']['resolution_y']);
				unset($ThisFileInfo['quicktime']['video']);
			}
			break;


		case 'mdat': // Media DATa atom
		case 'free': // FREE space atom
		case 'skip': // SKIP atom
		case 'wide': // 64-bit expansion placeholder atom
			// 'mdat' data is too big to deal with, contains no useful metadata
			// 'free', 'skip' and 'wide' are just padding, contains no useful data at all

			// When writing QuickTime files, it is sometimes necessary to update an atom's size.
			// It is impossible to update a 32-bit atom to a 64-bit atom since the 32-bit atom
			// is only 8 bytes in size, and the 64-bit atom requires 16 bytes. Therefore, QuickTime
			// puts an 8-byte placeholder atom before any atoms it may have to update the size of.
			// In this way, if the atom needs to be converted from a 32-bit to a 64-bit atom, the
			// placeholder atom can be overwritten to obtain the necessary 8 extra bytes.
			// The placeholder atom has a type of kWideAtomPlaceholderType ( 'wide' ).
			break;


		default:
			$ThisFileInfo['warning'] .= "\n".'Unknown QuickTime atom type: "'.$atomname.'" at offset '.$baseoffset;
			$atomstructure['data'] = $atomdata;
			break;
	}
	array_pop($atomHierarchy);
	return $atomstructure;
}

function QuicktimeParseContainerAtom($atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy) {
	$atomstructure  = false;
	$subatomoffset  = 0;
	$subatomcounter = 0;
	if ((strlen($atomdata) == 4) && (BigEndian2Int($atomdata) == 0x00000000)) {
		return false;
	}
	while ($subatomoffset < strlen($atomdata)) {
		$subatomsize = BigEndian2Int(substr($atomdata, $subatomoffset + 0, 4));
		$subatomname =               substr($atomdata, $subatomoffset + 4, 4);
		$subatomdata =               substr($atomdata, $subatomoffset + 8, $subatomsize - 8);
		if ($subatomsize == 0) {
			// Furthermore, for historical reasons the list of atoms is optionally
			// terminated by a 32-bit integer set to 0. If you are writing a program
			// to read user data atoms, you should allow for the terminating 0.
			return $atomstructure;
		}

		$atomstructure[$subatomcounter] = QuicktimeParseAtom($subatomname, $subatomsize, $subatomdata, $ThisFileInfo, $baseoffset + $subatomoffset, $atomHierarchy);

		$subatomoffset += $subatomsize;
		$subatomcounter++;
	}
	return $atomstructure;
}


function QuicktimeLanguageLookup($languageid) {
	static $QuicktimeLanguageLookup = array();
	if (empty($QuicktimeLanguageLookup)) {
		$QuicktimeLanguageLookup[0]   = 'English';
		$QuicktimeLanguageLookup[1]   = 'French';
		$QuicktimeLanguageLookup[2]   = 'German';
		$QuicktimeLanguageLookup[3]   = 'Italian';
		$QuicktimeLanguageLookup[4]   = 'Dutch';
		$QuicktimeLanguageLookup[5]   = 'Swedish';
		$QuicktimeLanguageLookup[6]   = 'Spanish';
		$QuicktimeLanguageLookup[7]   = 'Danish';
		$QuicktimeLanguageLookup[8]   = 'Portuguese';
		$QuicktimeLanguageLookup[9]   = 'Norwegian';
		$QuicktimeLanguageLookup[10]  = 'Hebrew';
		$QuicktimeLanguageLookup[11]  = 'Japanese';
		$QuicktimeLanguageLookup[12]  = 'Arabic';
		$QuicktimeLanguageLookup[13]  = 'Finnish';
		$QuicktimeLanguageLookup[14]  = 'Greek';
		$QuicktimeLanguageLookup[15]  = 'Icelandic';
		$QuicktimeLanguageLookup[16]  = 'Maltese';
		$QuicktimeLanguageLookup[17]  = 'Turkish';
		$QuicktimeLanguageLookup[18]  = 'Croatian';
		$QuicktimeLanguageLookup[19]  = 'Chinese (Traditional)';
		$QuicktimeLanguageLookup[20]  = 'Urdu';
		$QuicktimeLanguageLookup[21]  = 'Hindi';
		$QuicktimeLanguageLookup[22]  = 'Thai';
		$QuicktimeLanguageLookup[23]  = 'Korean';
		$QuicktimeLanguageLookup[24]  = 'Lithuanian';
		$QuicktimeLanguageLookup[25]  = 'Polish';
		$QuicktimeLanguageLookup[26]  = 'Hungarian';
		$QuicktimeLanguageLookup[27]  = 'Estonian';
		$QuicktimeLanguageLookup[28]  = 'Lettish';
		$QuicktimeLanguageLookup[28]  = 'Latvian';
		$QuicktimeLanguageLookup[29]  = 'Saamisk';
		$QuicktimeLanguageLookup[29]  = 'Lappish';
		$QuicktimeLanguageLookup[30]  = 'Faeroese';
		$QuicktimeLanguageLookup[31]  = 'Farsi';
		$QuicktimeLanguageLookup[31]  = 'Persian';
		$QuicktimeLanguageLookup[32]  = 'Russian';
		$QuicktimeLanguageLookup[33]  = 'Chinese (Simplified)';
		$QuicktimeLanguageLookup[34]  = 'Flemish';
		$QuicktimeLanguageLookup[35]  = 'Irish';
		$QuicktimeLanguageLookup[36]  = 'Albanian';
		$QuicktimeLanguageLookup[37]  = 'Romanian';
		$QuicktimeLanguageLookup[38]  = 'Czech';
		$QuicktimeLanguageLookup[39]  = 'Slovak';
		$QuicktimeLanguageLookup[40]  = 'Slovenian';
		$QuicktimeLanguageLookup[41]  = 'Yiddish';
		$QuicktimeLanguageLookup[42]  = 'Serbian';
		$QuicktimeLanguageLookup[43]  = 'Macedonian';
		$QuicktimeLanguageLookup[44]  = 'Bulgarian';
		$QuicktimeLanguageLookup[45]  = 'Ukrainian';
		$QuicktimeLanguageLookup[46]  = 'Byelorussian';
		$QuicktimeLanguageLookup[47]  = 'Uzbek';
		$QuicktimeLanguageLookup[48]  = 'Kazakh';
		$QuicktimeLanguageLookup[49]  = 'Azerbaijani';
		$QuicktimeLanguageLookup[50]  = 'AzerbaijanAr';
		$QuicktimeLanguageLookup[51]  = 'Armenian';
		$QuicktimeLanguageLookup[52]  = 'Georgian';
		$QuicktimeLanguageLookup[53]  = 'Moldavian';
		$QuicktimeLanguageLookup[54]  = 'Kirghiz';
		$QuicktimeLanguageLookup[55]  = 'Tajiki';
		$QuicktimeLanguageLookup[56]  = 'Turkmen';
		$QuicktimeLanguageLookup[57]  = 'Mongolian';
		$QuicktimeLanguageLookup[58]  = 'MongolianCyr';
		$QuicktimeLanguageLookup[59]  = 'Pashto';
		$QuicktimeLanguageLookup[60]  = 'Kurdish';
		$QuicktimeLanguageLookup[61]  = 'Kashmiri';
		$QuicktimeLanguageLookup[62]  = 'Sindhi';
		$QuicktimeLanguageLookup[63]  = 'Tibetan';
		$QuicktimeLanguageLookup[64]  = 'Nepali';
		$QuicktimeLanguageLookup[65]  = 'Sanskrit';
		$QuicktimeLanguageLookup[66]  = 'Marathi';
		$QuicktimeLanguageLookup[67]  = 'Bengali';
		$QuicktimeLanguageLookup[68]  = 'Assamese';
		$QuicktimeLanguageLookup[69]  = 'Gujarati';
		$QuicktimeLanguageLookup[70]  = 'Punjabi';
		$QuicktimeLanguageLookup[71]  = 'Oriya';
		$QuicktimeLanguageLookup[72]  = 'Malayalam';
		$QuicktimeLanguageLookup[73]  = 'Kannada';
		$QuicktimeLanguageLookup[74]  = 'Tamil';
		$QuicktimeLanguageLookup[75]  = 'Telugu';
		$QuicktimeLanguageLookup[76]  = 'Sinhalese';
		$QuicktimeLanguageLookup[77]  = 'Burmese';
		$QuicktimeLanguageLookup[78]  = 'Khmer';
		$QuicktimeLanguageLookup[79]  = 'Lao';
		$QuicktimeLanguageLookup[80]  = 'Vietnamese';
		$QuicktimeLanguageLookup[81]  = 'Indonesian';
		$QuicktimeLanguageLookup[82]  = 'Tagalog';
		$QuicktimeLanguageLookup[83]  = 'MalayRoman';
		$QuicktimeLanguageLookup[84]  = 'MalayArabic';
		$QuicktimeLanguageLookup[85]  = 'Amharic';
		$QuicktimeLanguageLookup[86]  = 'Tigrinya';
		$QuicktimeLanguageLookup[87]  = 'Galla';
		$QuicktimeLanguageLookup[87]  = 'Oromo';
		$QuicktimeLanguageLookup[88]  = 'Somali';
		$QuicktimeLanguageLookup[89]  = 'Swahili';
		$QuicktimeLanguageLookup[90]  = 'Ruanda';
		$QuicktimeLanguageLookup[91]  = 'Rundi';
		$QuicktimeLanguageLookup[92]  = 'Chewa';
		$QuicktimeLanguageLookup[93]  = 'Malagasy';
		$QuicktimeLanguageLookup[94]  = 'Esperanto';
		$QuicktimeLanguageLookup[128] = 'Welsh';
		$QuicktimeLanguageLookup[129] = 'Basque';
		$QuicktimeLanguageLookup[130] = 'Catalan';
		$QuicktimeLanguageLookup[131] = 'Latin';
		$QuicktimeLanguageLookup[132] = 'Quechua';
		$QuicktimeLanguageLookup[133] = 'Guarani';
		$QuicktimeLanguageLookup[134] = 'Aymara';
		$QuicktimeLanguageLookup[135] = 'Tatar';
		$QuicktimeLanguageLookup[136] = 'Uighur';
		$QuicktimeLanguageLookup[137] = 'Dzongkha';
		$QuicktimeLanguageLookup[138] = 'JavaneseRom';
	}
	return (isset($QuicktimeLanguageLookup[$languageid]) ? $QuicktimeLanguageLookup[$languageid] : 'invalid');
}

function QuicktimeVideoCodecLookup($codecid) {
	static $QuicktimeVideoCodecLookup = array();
	if (empty($QuicktimeVideoCodecLookup)) {
		$QuicktimeVideoCodecLookup['rle '] = 'RLE-Animation';
		$QuicktimeVideoCodecLookup['avr '] = 'AVR-JPEG';
		$QuicktimeVideoCodecLookup['base'] = 'Base';
		$QuicktimeVideoCodecLookup['WRLE'] = 'BMP';
		$QuicktimeVideoCodecLookup['cvid'] = 'Cinepak';
		$QuicktimeVideoCodecLookup['clou'] = 'Cloud';
		$QuicktimeVideoCodecLookup['cmyk'] = 'CMYK';
		$QuicktimeVideoCodecLookup['yuv2'] = 'ComponentVideo';
		$QuicktimeVideoCodecLookup['yuvu'] = 'ComponentVideoSigned';
		$QuicktimeVideoCodecLookup['yuvs'] = 'ComponentVideoUnsigned';
		$QuicktimeVideoCodecLookup['dvc '] = 'DVC-NTSC';
		$QuicktimeVideoCodecLookup['dvcp'] = 'DVC-PAL';
		$QuicktimeVideoCodecLookup['dvpn'] = 'DVCPro-NTSC';
		$QuicktimeVideoCodecLookup['dvpp'] = 'DVCPro-PAL';
		$QuicktimeVideoCodecLookup['fire'] = 'Fire';
		$QuicktimeVideoCodecLookup['flic'] = 'FLC';
		$QuicktimeVideoCodecLookup['b48r'] = '48RGB';
		$QuicktimeVideoCodecLookup['gif '] = 'GIF';
		$QuicktimeVideoCodecLookup['smc '] = 'Graphics';
		$QuicktimeVideoCodecLookup['h261'] = 'H261';
		$QuicktimeVideoCodecLookup['h263'] = 'H263';
		$QuicktimeVideoCodecLookup['IV41'] = 'Indeo4';
		$QuicktimeVideoCodecLookup['jpeg'] = 'JPEG';
		$QuicktimeVideoCodecLookup['PNTG'] = 'MacPaint';
		$QuicktimeVideoCodecLookup['msvc'] = 'Microsoft Video1';
		$QuicktimeVideoCodecLookup['mjpa'] = 'Motion JPEG-A';
		$QuicktimeVideoCodecLookup['mjpb'] = 'Motion JPEG-B';
		$QuicktimeVideoCodecLookup['myuv'] = 'MPEG YUV420';
		$QuicktimeVideoCodecLookup['dmb1'] = 'OpenDML JPEG';
		$QuicktimeVideoCodecLookup['kpcd'] = 'PhotoCD';
		$QuicktimeVideoCodecLookup['8BPS'] = 'Planar RGB';
		$QuicktimeVideoCodecLookup['png '] = 'PNG';
		$QuicktimeVideoCodecLookup['qdrw'] = 'QuickDraw';
		$QuicktimeVideoCodecLookup['qdgx'] = 'QuickDrawGX';
		$QuicktimeVideoCodecLookup['raw '] = 'RAW';
		$QuicktimeVideoCodecLookup['.SGI'] = 'SGI';
		$QuicktimeVideoCodecLookup['b16g'] = '16Gray';
		$QuicktimeVideoCodecLookup['b64a'] = '64ARGB';
		$QuicktimeVideoCodecLookup['SVQ1'] = 'Sorenson Video 1';
		$QuicktimeVideoCodecLookup['SVQ1'] = 'Sorenson Video 3';
		$QuicktimeVideoCodecLookup['syv9'] = 'Sorenson YUV9';
		$QuicktimeVideoCodecLookup['tga '] = 'Targa';
		$QuicktimeVideoCodecLookup['b32a'] = '32AlphaGray';
		$QuicktimeVideoCodecLookup['tiff'] = 'TIFF';
		$QuicktimeVideoCodecLookup['path'] = 'Vector';
		$QuicktimeVideoCodecLookup['rpza'] = 'Video';
		$QuicktimeVideoCodecLookup['ripl'] = 'WaterRipple';
		$QuicktimeVideoCodecLookup['WRAW'] = 'Windows RAW';
		$QuicktimeVideoCodecLookup['y420'] = 'YUV420';
	}
	return (isset($QuicktimeVideoCodecLookup["$codecid"]) ? $QuicktimeVideoCodecLookup["$codecid"] : '');
}

function QuicktimeAudioCodecLookup($codecid) {
	static $QuicktimeAudioCodecLookup = array();
	if (empty($QuicktimeAudioCodecLookup)) {
		$QuicktimeAudioCodecLookup['.mp3']                   = 'Fraunhofer MPEG Layer-III alias';
		$QuicktimeAudioCodecLookup['aac ']                   = 'ISO/IEC 14496-3 AAC';
		$QuicktimeAudioCodecLookup['agsm']                   = 'Apple GSM 10:1';
		$QuicktimeAudioCodecLookup['alaw']                   = 'A-law 2:1';
		$QuicktimeAudioCodecLookup['conv']                   = 'Sample Format';
		$QuicktimeAudioCodecLookup['dvca']                   = 'DV';
		$QuicktimeAudioCodecLookup['dvi ']                   = 'DV 4:1';
		$QuicktimeAudioCodecLookup['eqal']                   = 'Frequency Equalizer';
		$QuicktimeAudioCodecLookup['fl32']                   = '32-bit Floating Point';
		$QuicktimeAudioCodecLookup['fl64']                   = '64-bit Floating Point';
		$QuicktimeAudioCodecLookup['ima4']                   = 'Interactive Multimedia Association 4:1';
		$QuicktimeAudioCodecLookup['in24']                   = '24-bit Integer';
		$QuicktimeAudioCodecLookup['in32']                   = '32-bit Integer';
		$QuicktimeAudioCodecLookup['lpc ']                   = 'LPC 23:1';
		$QuicktimeAudioCodecLookup['MAC3']                   = 'Macintosh Audio Compression/Expansion (MACE) 3:1';
		$QuicktimeAudioCodecLookup['MAC6']                   = 'Macintosh Audio Compression/Expansion (MACE) 6:1';
		$QuicktimeAudioCodecLookup['mixb']                   = '8-bit Mixer';
		$QuicktimeAudioCodecLookup['mixw']                   = '16-bit Mixer';
		$QuicktimeAudioCodecLookup['mp4a']                   = 'ISO/IEC 14496-3 AAC';
		$QuicktimeAudioCodecLookup['MS'.chr(0x00).chr(0x02)] = 'Microsoft ADPCM';
		$QuicktimeAudioCodecLookup['MS'.chr(0x00).chr(0x11)] = 'DV IMA';
		$QuicktimeAudioCodecLookup['MS'.chr(0x00).chr(0x55)] = 'Fraunhofer MPEG Layer III';
		$QuicktimeAudioCodecLookup['NONE']                   = 'No Encoding';
		$QuicktimeAudioCodecLookup['Qclp']                   = 'Qualcomm PureVoice';
		$QuicktimeAudioCodecLookup['QDM2']                   = 'QDesign Music 2';
		$QuicktimeAudioCodecLookup['QDMC']                   = 'QDesign Music 1';
		$QuicktimeAudioCodecLookup['ratb']                   = '8-bit Rate';
		$QuicktimeAudioCodecLookup['ratw']                   = '16-bit Rate';
		$QuicktimeAudioCodecLookup['raw ']                   = 'raw PCM';
		$QuicktimeAudioCodecLookup['sour']                   = 'Sound Source';
		$QuicktimeAudioCodecLookup['sowt']                   = 'signed/two\'s complement (Little Endian)';
		$QuicktimeAudioCodecLookup['str1']                   = 'Iomega MPEG layer II';
		$QuicktimeAudioCodecLookup['str2']                   = 'Iomega MPEG *layer II';
		$QuicktimeAudioCodecLookup['str3']                   = 'Iomega MPEG **layer II';
		$QuicktimeAudioCodecLookup['str4']                   = 'Iomega MPEG ***layer II';
		$QuicktimeAudioCodecLookup['twos']                   = 'signed/two\'s complement (Big Endian)';
		$QuicktimeAudioCodecLookup['ulaw']                   = 'mu-law 2:1';
	}
	return (isset($QuicktimeAudioCodecLookup["$codecid"]) ? $QuicktimeAudioCodecLookup["$codecid"] : '');
}

function QuicktimeDCOMLookup($compressionid) {
	static $QuicktimeDCOMLookup = array();
	if (empty($QuicktimeDCOMLookup)) {
		$QuicktimeDCOMLookup['zlib'] = 'ZLib Deflate';
		$QuicktimeDCOMLookup['adec'] = 'Apple Compression';
	}
	return (isset($QuicktimeDCOMLookup["$compressionid"]) ? $QuicktimeDCOMLookup["$compressionid"] : '');
}

function QuicktimeColorNameLookup($colordepthid) {
	static $QuicktimeColorNameLookup = array();
	if (empty($QuicktimeColorNameLookup)) {
		$QuicktimeColorNameLookup[1]  = '2-color (monochrome)';
		$QuicktimeColorNameLookup[2]  = '4-color';
		$QuicktimeColorNameLookup[4]  = '16-color';
		$QuicktimeColorNameLookup[8]  = '256-color';
		$QuicktimeColorNameLookup[16] = 'thousands (16-bit color)';
		$QuicktimeColorNameLookup[24] = 'millions (24-bit color)';
		$QuicktimeColorNameLookup[32] = 'millions+ (32-bit color)';
		$QuicktimeColorNameLookup[33] = 'black & white';
		$QuicktimeColorNameLookup[34] = '4-gray';
		$QuicktimeColorNameLookup[36] = '16-gray';
		$QuicktimeColorNameLookup[40] = '256-gray';
	}
	return (isset($QuicktimeColorNameLookup[$colordepthid]) ? $QuicktimeColorNameLookup[$colordepthid] : 'invalid');
}

?>
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