<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.quicktime.php                            //
// module for analyzing Quicktime and MP3-in-MP4 files         //
// dependencies: module.audio.mp3.php                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.mp3.php', __FILE__, true);

class getid3_quicktime
{

	function getid3_quicktime(&$fd, &$ThisFileInfo, $ReturnAtomData=true, $ParseAllPossibleAtoms=false) {

		$ThisFileInfo['fileformat'] = 'quicktime';
		$ThisFileInfo['quicktime']['hinting'] = false;

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

		$offset      = 0;
		$atomcounter = 0;

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

			$atomsize = getid3_lib::BigEndian2Int(substr($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']) {
				$ThisFileInfo['error'][] = 'Atom at offset '.$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 (($atomsize > 8) && (!isset($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'];

						if (getid3_mp3::MPEGaudioHeaderValid(getid3_mp3::MPEGaudioHeaderDecode(fread($fd, 4)))) {
							getid3_mp3::getOnlyMPEGaudioInfo($fd, $ThisFileInfo, $ThisFileInfo['avdataoffset'], false);
							if (isset($ThisFileInfo['mpeg']['audio'])) {
								$ThisFileInfo['audio']['dataformat']   = 'mp3';
								$ThisFileInfo['audio']['codec']        = (!empty($ThisFileInfo['mpeg']['audio']['encoder']) ? $ThisFileInfo['mpeg']['audio']['encoder'] : (!empty($ThisFileInfo['mpeg']['audio']['codec']) ? $ThisFileInfo['mpeg']['audio']['codec'] : (!empty($ThisFileInfo['mpeg']['audio']['LAME']) ? 'LAME' :'mp3')));
								$ThisFileInfo['audio']['sample_rate']  = $ThisFileInfo['mpeg']['audio']['sample_rate'];
								$ThisFileInfo['audio']['channels']     = $ThisFileInfo['mpeg']['audio']['channels'];
								$ThisFileInfo['audio']['bitrate']      = $ThisFileInfo['mpeg']['audio']['bitrate'];
								$ThisFileInfo['audio']['bitrate_mode'] = strtolower($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] = $this->QuicktimeParseAtom($atomname, $atomsize, fread($fd, $atomsize), $ThisFileInfo, $offset, $atomHierarchy, $ParseAllPossibleAtoms);
					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']);
		}

		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'];
		}

		if (($ThisFileInfo['audio']['dataformat'] == 'mp4') && empty($ThisFileInfo['video']['resolution_x'])) {
			$ThisFileInfo['fileformat'] = 'mp4';
			$ThisFileInfo['mime_type']  = 'audio/mp4';
			unset($ThisFileInfo['video']['dataformat']);
		}

		if (!$ReturnAtomData) {
			unset($ThisFileInfo['quicktime']['moov']);
		}

		if (empty($ThisFileInfo['audio']['dataformat']) && !empty($ThisFileInfo['quicktime']['audio'])) {
			$ThisFileInfo['audio']['dataformat'] = 'quicktime';
		}
		if (empty($ThisFileInfo['video']['dataformat']) && !empty($ThisFileInfo['quicktime']['video'])) {
			$ThisFileInfo['video']['dataformat'] = 'quicktime';
		}

		return true;
	}

	function QuicktimeParseAtom($atomname, $atomsize, $atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy, $ParseAllPossibleAtoms) {
		// 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
			case 'gmhd': // Generic Media info HeaDer atom (seen on QTVR)
				$atomstructure['subatoms'] = $this->QuicktimeParseContainerAtom($atomdata, $ThisFileInfo, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
				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':
				$atomstructure['data_length'] = getid3_lib::BigEndian2Int(substr($atomdata,  0, 2));
				$atomstructure['language_id'] = getid3_lib::BigEndian2Int(substr($atomdata,  2, 2));
				$atomstructure['data']        =                           substr($atomdata,  4);

				$atomstructure['language']    = $this->QuicktimeLanguageLookup($atomstructure['language_id']);
				if (empty($ThisFileInfo['comments']['language']) || (!in_array($atomstructure['language'], $ThisFileInfo['comments']['language']))) {
					$ThisFileInfo['comments']['language'][] = $atomstructure['language'];
				}
				$this->CopyToAppropriateCommentsSection($atomname, $atomstructure['data'], $ThisFileInfo);
				break;


			case 'play': // auto-PLAY atom
				$atomstructure['autoplay']             = (bool) getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));

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


			case 'WLOC': // Window LOCation atom
				$atomstructure['location_x']  = getid3_lib::BigEndian2Int(substr($atomdata,  0, 2));
				$atomstructure['location_y']  = getid3_lib::BigEndian2Int(substr($atomdata,  2, 2));
				break;


			case 'LOOP': // LOOPing atom
			case 'SelO': // play SELection Only atom
			case 'AllF': // play ALL Frames atom
				$atomstructure['data'] = getid3_lib::BigEndian2Int($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
				// Code by ubergeekubergeek*tv based on information from
				// http://developer.apple.com/quicktime/icefloe/dispatch012.html
				$atomstructure['unCompressedSize'] = getid3_lib::BigEndian2Int(substr($atomdata, 0, 4));

				$CompressedFileData = substr($atomdata, 4);
				if ($UncompressedHeader = @gzuncompress($CompressedFileData)) {
					$atomstructure['subatoms'] = $this->QuicktimeParseContainerAtom($UncompressedHeader, $ThisFileInfo, 0, $atomHierarchy, $ParseAllPossibleAtoms);
				} else {
					$ThisFileInfo['warning'][] = 'Error decompressing compressed MOV atom at offset '.$atomstructure['offset'];
				}
				break;


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


			case 'rdrf': // Reference movie Data ReFerence atom
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3));
				$atomstructure['flags']['internal_data'] = (bool) ($atomstructure['flags_raw'] & 0x000001);

				$atomstructure['reference_type_name']    =                           substr($atomdata,  4, 4);
				$atomstructure['reference_length']       = getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				switch ($atomstructure['reference_type_name']) {
					case 'url ':
						$atomstructure['url']            =       $this->NoNullString(substr($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
				$atomstructure['movie_quality'] = getid3_lib::BigEndian2Int($atomdata);
				break;


			case 'rmcs': // Reference Movie Cpu Speed atom
				$atomstructure['version']          = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']        = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['cpu_speed_rating'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));
				break;


			case 'rmvc': // Reference Movie Version Check atom
				$atomstructure['version']            = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']          = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['gestalt_selector']   =                           substr($atomdata,  4, 4);
				$atomstructure['gestalt_value_mask'] = getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				$atomstructure['gestalt_value']      = getid3_lib::BigEndian2Int(substr($atomdata, 12, 4));
				$atomstructure['gestalt_check_type'] = getid3_lib::BigEndian2Int(substr($atomdata, 14, 2));
				break;


			case 'rmcd': // Reference Movie Component check atom
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['component_type']         =                           substr($atomdata,  4, 4);
				$atomstructure['component_subtype']      =                           substr($atomdata,  8, 4);
				$atomstructure['component_manufacturer'] =                           substr($atomdata, 12, 4);
				$atomstructure['component_flags_raw']    = getid3_lib::BigEndian2Int(substr($atomdata, 16, 4));
				$atomstructure['component_flags_mask']   = getid3_lib::BigEndian2Int(substr($atomdata, 20, 4));
				$atomstructure['component_min_version']  = getid3_lib::BigEndian2Int(substr($atomdata, 24, 4));
				break;


			case 'rmdr': // Reference Movie Data Rate atom
				$atomstructure['version']       = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']     = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['data_rate']     = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));

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


			case 'rmla': // Reference Movie Language Atom
				$atomstructure['version']     = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']   = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['language_id'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));

				$atomstructure['language']    = $this->QuicktimeLanguageLookup($atomstructure['language_id']);
				if (empty($ThisFileInfo['comments']['language']) || (!in_array($atomstructure['language'], $ThisFileInfo['comments']['language']))) {
					$ThisFileInfo['comments']['language'][] = $atomstructure['language'];
				}
				break;


			case 'rmla': // Reference Movie Language Atom
				$atomstructure['version']   = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw'] = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['track_id']  = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));
				break;


			case 'ptv ': // Print To Video - defines a movie's full screen mode
				// http://developer.apple.com/documentation/QuickTime/APIREF/SOURCESIV/at_ptv-_pg.htm
				$atomstructure['display_size_raw']  = getid3_lib::BigEndian2Int(substr($atomdata, 0, 2));
				$atomstructure['reserved_1']        = getid3_lib::BigEndian2Int(substr($atomdata, 2, 2)); // hardcoded: 0x0000
				$atomstructure['reserved_2']        = getid3_lib::BigEndian2Int(substr($atomdata, 4, 2)); // hardcoded: 0x0000
				$atomstructure['slide_show_flag']   = getid3_lib::BigEndian2Int(substr($atomdata, 6, 1));
				$atomstructure['play_on_open_flag'] = getid3_lib::BigEndian2Int(substr($atomdata, 7, 1));

				$atomstructure['flags']['play_on_open'] = (bool) $atomstructure['play_on_open_flag'];
				$atomstructure['flags']['slide_show']   = (bool) $atomstructure['slide_show_flag'];

				$ptv_lookup[0] = 'normal';
				$ptv_lookup[1] = 'double';
				$ptv_lookup[2] = 'half';
				$ptv_lookup[3] = 'full';
				$ptv_lookup[4] = 'current';
				if (isset($ptv_lookup[$atomstructure['display_size_raw']])) {
					$atomstructure['display_size'] = $ptv_lookup[$atomstructure['display_size_raw']];
				} else {
					$ThisFileInfo['warning'][] = 'unknown "ptv " display constant ('.$atomstructure['display_size_raw'].')';
				}
				break;


			case 'stsd': // Sample Table Sample Description atom
				$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$stsdEntriesDataOffset = 8;
				for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
					$atomstructure['sample_description_table'][$i]['size']             = getid3_lib::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']         = getid3_lib::BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 6));
					$stsdEntriesDataOffset += 6;
					$atomstructure['sample_description_table'][$i]['reference_index']  = getid3_lib::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']  = getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  0, 2));
					$atomstructure['sample_description_table'][$i]['encoder_revision'] = getid3_lib::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);

					switch ($atomstructure['sample_description_table'][$i]['encoder_vendor']) {

						case "\x00\x00\x00\x00":
							// audio atom
							$atomstructure['sample_description_table'][$i]['audio_channels']       =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  8,  2));
							$atomstructure['sample_description_table'][$i]['audio_bit_depth']      =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 10,  2));
							$atomstructure['sample_description_table'][$i]['audio_compression_id'] =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12,  2));
							$atomstructure['sample_description_table'][$i]['audio_packet_size']    =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 14,  2));
							$atomstructure['sample_description_table'][$i]['audio_sample_rate']    = getid3_lib::FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 16,  4));

							switch ($atomstructure['sample_description_table'][$i]['data_format']) {
								case 'mp4v':
									$ThisFileInfo['fileformat'] = 'mp4';
									$ThisFileInfo['error'][] = 'This version ('.GETID3_VERSION.') of getID3() does not fully support MPEG-4 audio/video streams';
									break;

								case 'qtvr':
									$ThisFileInfo['video']['dataformat'] = 'quicktimevr';
									break;

								case 'mp4a':
								default:
									$ThisFileInfo['quicktime']['audio']['codec']       = $this->QuicktimeAudioCodecLookup($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']          = $ThisFileInfo['quicktime']['audio']['bit_depth'];
									switch ($atomstructure['sample_description_table'][$i]['data_format']) {
										case 'raw ': // PCM
										case 'alac': // Apple Lossless Audio Codec
											$ThisFileInfo['audio']['lossless'] = true;
											break;
										default:
											$ThisFileInfo['audio']['lossless'] = false;
											break;
									}
									break;
							}
							break;

						default:
							switch ($atomstructure['sample_description_table'][$i]['data_format']) {
								case 'mp4s':
									$ThisFileInfo['fileformat'] = 'mp4';
									break;

								default:
									// video atom
									$atomstructure['sample_description_table'][$i]['video_temporal_quality']  =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'],  8,  4));
									$atomstructure['sample_description_table'][$i]['video_spatial_quality']   =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12,  4));
									$atomstructure['sample_description_table'][$i]['video_frame_width']       =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 16,  2));
									$atomstructure['sample_description_table'][$i]['video_frame_height']      =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 18,  2));
									$atomstructure['sample_description_table'][$i]['video_resolution_x']      = getid3_lib::FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 20,  4));
									$atomstructure['sample_description_table'][$i]['video_resolution_y']      = getid3_lib::FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 24,  4));
									$atomstructure['sample_description_table'][$i]['video_data_size']         =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 28,  4));
									$atomstructure['sample_description_table'][$i]['video_frame_count']       =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 32,  2));
									$atomstructure['sample_description_table'][$i]['video_encoder_name_len']  =   getid3_lib::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'] =   getid3_lib::BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 66,  2));
									$atomstructure['sample_description_table'][$i]['video_color_table_id']    =   getid3_lib::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']  = $this->QuicktimeColorNameLookup($atomstructure['sample_description_table'][$i]['video_pixel_color_depth']);

									if ($atomstructure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
										$ThisFileInfo['quicktime']['video']['codec_fourcc']        = $atomstructure['sample_description_table'][$i]['data_format'];
										$ThisFileInfo['quicktime']['video']['codec_fourcc_lookup'] = $this->QuicktimeVideoCodecLookup($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;
									$ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
									break;
							}
							break;
					}
					switch (strtolower($atomstructure['sample_description_table'][$i]['data_format'])) {
						case 'mp4a':
							$ThisFileInfo['audio']['dataformat']         = 'mp4';
							$ThisFileInfo['quicktime']['audio']['codec'] = 'mp4';
							break;

						case '3ivx':
						case '3iv1':
						case '3iv2':
							$ThisFileInfo['video']['dataformat'] = '3ivx';
							break;

						case 'xvid':
							$ThisFileInfo['video']['dataformat'] = 'xvid';
							break;

						case 'mp4v':
							$ThisFileInfo['video']['dataformat'] = 'mpeg4';
							break;

						case 'divx':
						case 'div1':
						case 'div2':
						case 'div3':
						case 'div4':
						case 'div5':
						case 'div6':
							$TDIVXileInfo['video']['dataformat'] = 'divx';
							break;

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


			case 'stts': // Sample Table Time-to-Sample atom
				//if ($ParseAllPossibleAtoms) {
					$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
					$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
					$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
					$sttsEntriesDataOffset = 8;
					$FrameRateCalculatorArray = array();
					for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
						$atomstructure['time_to_sample_table'][$i]['sample_count']    = getid3_lib::BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
						$sttsEntriesDataOffset += 4;
						$atomstructure['time_to_sample_table'][$i]['sample_duration'] = getid3_lib::BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
						$sttsEntriesDataOffset += 4;

						if (!empty($ThisFileInfo['quicktime']['time_scale'])) {
							$stts_new_framerate = $ThisFileInfo['quicktime']['time_scale'] / $atomstructure['time_to_sample_table'][$i]['sample_duration'];
							if ($stts_new_framerate <= 60) {
								// some atoms have durations of "1" giving a very large framerate, which probably is not right
								$ThisFileInfo['video']['frame_rate'] = max(@$ThisFileInfo['video']['frame_rate'], $stts_new_framerate);
							}
						}
						//@$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 < 1)) {
					//		// not video FPS information, probably audio information
					//		$sttsFramesTotal  = 0;
					//		$sttsSecondsTotal = 0;
					//		break;
					//	}
					//	$sttsFramesTotal  += $frame_count;
					//	$sttsSecondsTotal += $frame_count / $frames_per_second;
					//}
					//if (($sttsFramesTotal > 0) && ($sttsSecondsTotal > 0)) {
					//	if (($sttsFramesTotal / $sttsSecondsTotal) > @$ThisFileInfo['video']['frame_rate']) {
					//		$ThisFileInfo['video']['frame_rate'] = $sttsFramesTotal / $sttsSecondsTotal;
					//	}
					//}
				//}
				break;


			case 'stss': // Sample Table Sync Sample (key frames) atom
				if ($ParseAllPossibleAtoms) {
					$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
					$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
					$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
					$stssEntriesDataOffset = 8;
					for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
						$atomstructure['time_to_sample_table'][$i] = getid3_lib::BigEndian2Int(substr($atomdata, $stssEntriesDataOffset, 4));
						$stssEntriesDataOffset += 4;
					}
				}
				break;


			case 'stsc': // Sample Table Sample-to-Chunk atom
				if ($ParseAllPossibleAtoms) {
					$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
					$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
					$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
					$stscEntriesDataOffset = 8;
					for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
						$atomstructure['sample_to_chunk_table'][$i]['first_chunk']        = getid3_lib::BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
						$stscEntriesDataOffset += 4;
						$atomstructure['sample_to_chunk_table'][$i]['samples_per_chunk']  = getid3_lib::BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
						$stscEntriesDataOffset += 4;
						$atomstructure['sample_to_chunk_table'][$i]['sample_description'] = getid3_lib::BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
						$stscEntriesDataOffset += 4;
					}
				}
				break;


			case 'stsz': // Sample Table SiZe atom
				if ($ParseAllPossibleAtoms) {
					$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
					$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
					$atomstructure['sample_size']    = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
					$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
					$stszEntriesDataOffset = 12;
					if ($atomstructure['sample_size'] == 0) {
						for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
							$atomstructure['sample_size_table'][$i] = getid3_lib::BigEndian2Int(substr($atomdata, $stszEntriesDataOffset, 4));
							$stszEntriesDataOffset += 4;
						}
					}
				}
				break;


			case 'stco': // Sample Table Chunk Offset atom
				if ($ParseAllPossibleAtoms) {
					$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
					$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
					$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
					$stcoEntriesDataOffset = 8;
					for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
						$atomstructure['chunk_offset_table'][$i] = getid3_lib::BigEndian2Int(substr($atomdata, $stcoEntriesDataOffset, 4));
						$stcoEntriesDataOffset += 4;
					}
				}
				break;


			case 'dref': // Data REFerence atom
				$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$drefDataOffset = 8;
				for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
					$atomstructure['data_references'][$i]['size']                    = getid3_lib::BigEndian2Int(substr($atomdata, $drefDataOffset, 4));
					$drefDataOffset += 4;
					$atomstructure['data_references'][$i]['type']                    =               substr($atomdata, $drefDataOffset, 4);
					$drefDataOffset += 4;
					$atomstructure['data_references'][$i]['version']                 = getid3_lib::BigEndian2Int(substr($atomdata,  $drefDataOffset, 1));
					$drefDataOffset += 1;
					$atomstructure['data_references'][$i]['flags_raw']               = getid3_lib::BigEndian2Int(substr($atomdata,  $drefDataOffset, 3)); // hardcoded: 0x0000
					$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
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['graphics_mode']          = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));
				$atomstructure['opcolor_red']            = getid3_lib::BigEndian2Int(substr($atomdata,  6, 2));
				$atomstructure['opcolor_green']          = getid3_lib::BigEndian2Int(substr($atomdata,  8, 2));
				$atomstructure['opcolor_blue']           = getid3_lib::BigEndian2Int(substr($atomdata, 10, 2));
				$atomstructure['balance']                = getid3_lib::BigEndian2Int(substr($atomdata, 12, 2));
				$atomstructure['reserved']               = getid3_lib::BigEndian2Int(substr($atomdata, 14, 2));
				break;


			case 'smhd': // Sound Media information HeaDer atom
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['balance']                = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));
				$atomstructure['reserved']               = getid3_lib::BigEndian2Int(substr($atomdata,  6, 2));
				break;


			case 'vmhd': // Video Media information HeaDer atom
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3));
				$atomstructure['graphics_mode']          = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2));
				$atomstructure['opcolor_red']            = getid3_lib::BigEndian2Int(substr($atomdata,  6, 2));
				$atomstructure['opcolor_green']          = getid3_lib::BigEndian2Int(substr($atomdata,  8, 2));
				$atomstructure['opcolor_blue']           = getid3_lib::BigEndian2Int(substr($atomdata, 10, 2));

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


			case 'hdlr': // HanDLeR reference atom
				$atomstructure['version']                = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['component_type']         =                           substr($atomdata,  4, 4);
				$atomstructure['component_subtype']      =                           substr($atomdata,  8, 4);
				$atomstructure['component_manufacturer'] =                           substr($atomdata, 12, 4);
				$atomstructure['component_flags_raw']    = getid3_lib::BigEndian2Int(substr($atomdata, 16, 4));
				$atomstructure['component_flags_mask']   = getid3_lib::BigEndian2Int(substr($atomdata, 20, 4));
				$atomstructure['component_name']         =      $this->Pascal2String(substr($atomdata, 24));

				if (($atomstructure['component_subtype'] == 'STpn') && ($atomstructure['component_manufacturer'] == 'zzzz')) {
					$ThisFileInfo['video']['dataformat'] = 'quicktimevr';
				}
				break;


			case 'mdhd': // MeDia HeaDer atom
				$atomstructure['version']               = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']             = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['creation_time']         = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$atomstructure['modify_time']           = getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				$atomstructure['time_scale']            = getid3_lib::BigEndian2Int(substr($atomdata, 12, 4));
				$atomstructure['duration']              = getid3_lib::BigEndian2Int(substr($atomdata, 16, 4));
				$atomstructure['language_id']           = getid3_lib::BigEndian2Int(substr($atomdata, 20, 2));
				$atomstructure['quality']               = getid3_lib::BigEndian2Int(substr($atomdata, 22, 2));

				if ($atomstructure['time_scale'] == 0) {
					$ThisFileInfo['error'][] = 'Corrupt Quicktime file: mdhd.time_scale == zero';
					return false;
				}
				$atomstructure['creation_time_unix']    = getid3_lib::DateMac2Unix($atomstructure['creation_time']);
				$atomstructure['modify_time_unix']      = getid3_lib::DateMac2Unix($atomstructure['modify_time']);
				$atomstructure['playtime_seconds']      = $atomstructure['duration'] / $atomstructure['time_scale'];
				$atomstructure['language']              = $this->QuicktimeLanguageLookup($atomstructure['language_id']);
				if (empty($ThisFileInfo['comments']['language']) || (!in_array($atomstructure['language'], $ThisFileInfo['comments']['language']))) {
					$ThisFileInfo['comments']['language'][] = $atomstructure['language'];
				}
				break;


			case 'pnot': // Preview atom
				$atomstructure['modification_date']      = getid3_lib::BigEndian2Int(substr($atomdata,  0, 4)); // "standard Macintosh format"
				$atomstructure['version_number']         = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2)); // hardcoded: 0x00
				$atomstructure['atom_type']              =               substr($atomdata,  6, 4);        // usually: 'PICT'
				$atomstructure['atom_index']             = getid3_lib::BigEndian2Int(substr($atomdata, 10, 2)); // usually: 0x01

				$atomstructure['modification_date_unix'] = getid3_lib::DateMac2Unix($atomstructure['modification_date']);
				break;


			case 'crgn': // Clipping ReGioN atom
				$atomstructure['region_size']   = getid3_lib::BigEndian2Int(substr($atomdata,  0, 2)); // The Region size, Region boundary box,
				$atomstructure['boundary_box']  = getid3_lib::BigEndian2Int(substr($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
				$atomstructure['preload_start_time'] = getid3_lib::BigEndian2Int(substr($atomdata,  0, 4));
				$atomstructure['preload_duration']   = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$atomstructure['preload_flags_raw']  = getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				$atomstructure['default_hints_raw']  = getid3_lib::BigEndian2Int(substr($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] = getid3_lib::BigEndian2Int(substr($atomdata, $i * 4, 4));
				}
				break;


			case 'elst': // Edit LiST atom
				$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['number_entries'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				for ($i = 0; $i < $atomstructure['number_entries']; $i++ ) {
					$atomstructure['edit_list'][$i]['track_duration'] =   getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($i * 12) + 0, 4));
					$atomstructure['edit_list'][$i]['media_time']     =   getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($i * 12) + 4, 4));
					$atomstructure['edit_list'][$i]['media_rate']     = getid3_lib::FixedPoint16_16(substr($atomdata, 8 + ($i * 12) + 8, 4));
				}
				break;


			case 'kmat': // compressed MATte atom
				$atomstructure['version']        = getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atomdata,  1, 3)); // hardcoded: 0x0000
				$atomstructure['matte_data_raw'] =               substr($atomdata,  4);
				break;


			case 'ctab': // Color TABle atom
				$atomstructure['color_table_seed']   = getid3_lib::BigEndian2Int(substr($atomdata,  0, 4)); // hardcoded: 0x00000000
				$atomstructure['color_table_flags']  = getid3_lib::BigEndian2Int(substr($atomdata,  4, 2)); // hardcoded: 0x8000
				$atomstructure['color_table_size']   = getid3_lib::BigEndian2Int(substr($atomdata,  6, 2)) + 1;
				for ($colortableentry = 0; $colortableentry < $atomstructure['color_table_size']; $colortableentry++) {
					$atomstructure['color_table'][$colortableentry]['alpha'] = getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 0, 2));
					$atomstructure['color_table'][$colortableentry]['red']   = getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 2, 2));
					$atomstructure['color_table'][$colortableentry]['green'] = getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 4, 2));
					$atomstructure['color_table'][$colortableentry]['blue']  = getid3_lib::BigEndian2Int(substr($atomdata, 8 + ($colortableentry * 8) + 6, 2));
				}
				break;


			case 'mvhd': // MoVie HeaDer atom
				$atomstructure['version']            =   getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']          =   getid3_lib::BigEndian2Int(substr($atomdata,  1, 3));
				$atomstructure['creation_time']      =   getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$atomstructure['modify_time']        =   getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				$atomstructure['time_scale']         =   getid3_lib::BigEndian2Int(substr($atomdata, 12, 4));
				$atomstructure['duration']           =   getid3_lib::BigEndian2Int(substr($atomdata, 16, 4));
				$atomstructure['preferred_rate']     = getid3_lib::FixedPoint16_16(substr($atomdata, 20, 4));
				$atomstructure['preferred_volume']   =   getid3_lib::FixedPoint8_8(substr($atomdata, 24, 2));
				$atomstructure['reserved']           =                             substr($atomdata, 26, 10);
				$atomstructure['matrix_a']           = getid3_lib::FixedPoint16_16(substr($atomdata, 36, 4));
				$atomstructure['matrix_b']           = getid3_lib::FixedPoint16_16(substr($atomdata, 40, 4));
				$atomstructure['matrix_u']           =  getid3_lib::FixedPoint2_30(substr($atomdata, 44, 4));
				$atomstructure['matrix_c']           = getid3_lib::FixedPoint16_16(substr($atomdata, 48, 4));
				$atomstructure['matrix_d']           = getid3_lib::FixedPoint16_16(substr($atomdata, 52, 4));
				$atomstructure['matrix_v']           =  getid3_lib::FixedPoint2_30(substr($atomdata, 56, 4));
				$atomstructure['matrix_x']           = getid3_lib::FixedPoint16_16(substr($atomdata, 60, 4));
				$atomstructure['matrix_y']           = getid3_lib::FixedPoint16_16(substr($atomdata, 64, 4));
				$atomstructure['matrix_w']           =  getid3_lib::FixedPoint2_30(substr($atomdata, 68, 4));
				$atomstructure['preview_time']       =   getid3_lib::BigEndian2Int(substr($atomdata, 72, 4));
				$atomstructure['preview_duration']   =   getid3_lib::BigEndian2Int(substr($atomdata, 76, 4));
				$atomstructure['poster_time']        =   getid3_lib::BigEndian2Int(substr($atomdata, 80, 4));
				$atomstructure['selection_time']     =   getid3_lib::BigEndian2Int(substr($atomdata, 84, 4));
				$atomstructure['selection_duration'] =   getid3_lib::BigEndian2Int(substr($atomdata, 88, 4));
				$atomstructure['current_time']       =   getid3_lib::BigEndian2Int(substr($atomdata, 92, 4));
				$atomstructure['next_track_id']      =   getid3_lib::BigEndian2Int(substr($atomdata, 96, 4));

				if ($atomstructure['time_scale'] == 0) {
					$ThisFileInfo['error'][] = 'Corrupt Quicktime file: mvhd.time_scale == zero';
					return false;
				}
				$atomstructure['creation_time_unix']        = getid3_lib::DateMac2Unix($atomstructure['creation_time']);
				$atomstructure['modify_time_unix']          = getid3_lib::DateMac2Unix($atomstructure['modify_time']);
				$ThisFileInfo['quicktime']['time_scale']    = $atomstructure['time_scale'];
				$ThisFileInfo['quicktime']['display_scale'] = $atomstructure['matrix_a'];
				$ThisFileInfo['playtime_seconds']           = $atomstructure['duration'] / $atomstructure['time_scale'];
				break;


			case 'tkhd': // TracK HeaDer atom
				$atomstructure['version']             =   getid3_lib::BigEndian2Int(substr($atomdata,  0, 1));
				$atomstructure['flags_raw']           =   getid3_lib::BigEndian2Int(substr($atomdata,  1, 3));
				$atomstructure['creation_time']       =   getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$atomstructure['modify_time']         =   getid3_lib::BigEndian2Int(substr($atomdata,  8, 4));
				$atomstructure['trackid']             =   getid3_lib::BigEndian2Int(substr($atomdata, 12, 4));
				$atomstructure['reserved1']           =   getid3_lib::BigEndian2Int(substr($atomdata, 16, 4));
				$atomstructure['duration']            =   getid3_lib::BigEndian2Int(substr($atomdata, 20, 4));
				$atomstructure['reserved2']           =   getid3_lib::BigEndian2Int(substr($atomdata, 24, 8));
				$atomstructure['layer']               =   getid3_lib::BigEndian2Int(substr($atomdata, 32, 2));
				$atomstructure['alternate_group']     =   getid3_lib::BigEndian2Int(substr($atomdata, 34, 2));
				$atomstructure['volume']              =   getid3_lib::FixedPoint8_8(substr($atomdata, 36, 2));
				$atomstructure['reserved3']           =   getid3_lib::BigEndian2Int(substr($atomdata, 38, 2));
				$atomstructure['matrix_a']            = getid3_lib::FixedPoint16_16(substr($atomdata, 40, 4));
				$atomstructure['matrix_b']            = getid3_lib::FixedPoint16_16(substr($atomdata, 44, 4));
				$atomstructure['matrix_u']            = getid3_lib::FixedPoint16_16(substr($atomdata, 48, 4));
				$atomstructure['matrix_c']            = getid3_lib::FixedPoint16_16(substr($atomdata, 52, 4));
				$atomstructure['matrix_v']            = getid3_lib::FixedPoint16_16(substr($atomdata, 56, 4));
				$atomstructure['matrix_d']            = getid3_lib::FixedPoint16_16(substr($atomdata, 60, 4));
				$atomstructure['matrix_x']            =  getid3_lib::FixedPoint2_30(substr($atomdata, 64, 4));
				$atomstructure['matrix_y']            =  getid3_lib::FixedPoint2_30(substr($atomdata, 68, 4));
				$atomstructure['matrix_w']            =  getid3_lib::FixedPoint2_30(substr($atomdata, 72, 4));
				$atomstructure['width']               = getid3_lib::FixedPoint16_16(substr($atomdata, 76, 4));
				$atomstructure['height']              = getid3_lib::FixedPoint16_16(substr($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);
				$atomstructure['creation_time_unix']  = getid3_lib::DateMac2Unix($atomstructure['creation_time']);
				$atomstructure['modify_time_unix']    = getid3_lib::DateMac2Unix($atomstructure['modify_time']);

				if (!isset($ThisFileInfo['video']['resolution_x']) || !isset($ThisFileInfo['video']['resolution_y'])) {
					$ThisFileInfo['video']['resolution_x'] = $atomstructure['width'];
					$ThisFileInfo['video']['resolution_y'] = $atomstructure['height'];
				}
				if ($atomstructure['flags']['enabled'] == 1) {
					$ThisFileInfo['video']['resolution_x'] = max($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 'meta': // METAdata atom
				// http://www.geocities.com/xhelmboyx/quicktime/formats/qti-layout.txt
				$NextTagPosition = strpos($atomdata, '');
				while ($NextTagPosition < strlen($atomdata)) {
					$metaItemSize = getid3_lib::BigEndian2Int(substr($atomdata, $NextTagPosition - 4, 4)) - 4;
					if ($metaItemSize == -4) {
					    break;
					}
					$metaItemRaw  = substr($atomdata, $NextTagPosition, $metaItemSize);
					$metaItemKey  = substr($metaItemRaw, 0, 4);
					$metaItemData = substr($metaItemRaw, 20);
					$NextTagPosition += $metaItemSize + 4;

					$this->CopyToAppropriateCommentsSection($metaItemKey, $metaItemData, $ThisFileInfo);
				}
				break;

			case 'ftyp': // FileTYPe (?) atom (for MP4 it seems)
				$atomstructure['signature'] =                           substr($atomdata,  0, 4);
				$atomstructure['unknown_1'] = getid3_lib::BigEndian2Int(substr($atomdata,  4, 4));
				$atomstructure['fourcc']    =                           substr($atomdata,  8, 4);
				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;


			case 'nsav': // NoSAVe atom
				// http://developer.apple.com/technotes/tn/tn2038.html
				$atomstructure['data'] = getid3_lib::BigEndian2Int(substr($atomdata,  0, 4));
				break;

			case 'ctyp': // Controller TYPe atom (seen on QTVR)
				// http://homepages.slingshot.co.nz/~helmboy/quicktime/formats/qtm-layout.txt
				// some controller names are:
				//   0x00 + 'std' for linear movie
				//   'none' for no controls
				$atomstructure['ctyp'] = substr($atomdata, 0, 4);
				switch ($atomstructure['ctyp']) {
					case 'qtvr':
						$ThisFileInfo['video']['dataformat'] = 'quicktimevr';
						break;
				}
				break;

			case 'pano': // PANOrama track (seen on QTVR)
				$atomstructure['pano'] = getid3_lib::BigEndian2Int(substr($atomdata,  0, 4));
				break;

			case 'hint': // HINT track
			case 'hinf': //
			case 'hinv': //
			case 'hnti': //
				$ThisFileInfo['quicktime']['hinting'] = true;
				break;

			case 'imgt': // IMaGe Track reference (kQTVRImageTrackRefType) (seen on QTVR)
				for ($i = 0; $i < ($atomstructure['size'] - 8); $i += 4) {
					$atomstructure['imgt'][] = getid3_lib::BigEndian2Int(substr($atomdata, $i, 4));
				}
				break;

			case 'FXTC': // Something to do with Adobe After Effects (?)
			case 'PrmA':
			case 'code':
			case 'FIEL': // this is NOT "fiel" (Field Ordering) as describe here: http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html
				// Observed-but-not-handled atom types are just listed here
				// to prevent warnings being generated
				$atomstructure['data'] = $atomdata;
				break;

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

	function QuicktimeParseContainerAtom($atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy, $ParseAllPossibleAtoms) {
		$atomstructure  = false;
		$subatomoffset  = 0;
		$subatomcounter = 0;
		if ((strlen($atomdata) == 4) && (getid3_lib::BigEndian2Int($atomdata) == 0x00000000)) {
			return false;
		}
		while ($subatomoffset < strlen($atomdata)) {
			$subatomsize = getid3_lib::BigEndian2Int(substr($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] = $this->QuicktimeParseAtom($subatomname, $subatomsize, $subatomdata, $ThisFileInfo, $baseoffset + $subatomoffset, $atomHierarchy, $ParseAllPossibleAtoms);

			$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['3IVX'] = '3ivx MPEG-4';
			$QuicktimeVideoCodecLookup['3IV1'] = '3ivx MPEG-4 v1';
			$QuicktimeVideoCodecLookup['3IV2'] = '3ivx MPEG-4 v2';
			$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['alac']          = 'Apple Lossless Audio Codec';
			$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'."\x00\x02"] = 'Microsoft ADPCM';
			$QuicktimeAudioCodecLookup['MS'."\x00\x11"] = 'DV IMA';
			$QuicktimeAudioCodecLookup['MS'."\x00\x55"] = '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');
	}

	function CopyToAppropriateCommentsSection($keyname, $data, &$ThisFileInfo) {
		static $handyatomtranslatorarray = array();
		if (empty($handyatomtranslatorarray)) {
			$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[$keyname])) {
			$ThisFileInfo['quicktime']['comments'][$handyatomtranslatorarray[$keyname]][] = $data;
		}

		return true;
	}

	function NoNullString($nullterminatedstring) {
		// remove the single null terminator on null terminated strings
		if (substr($nullterminatedstring, strlen($nullterminatedstring) - 1, 1) === "\x00") {
			return substr($nullterminatedstring, 0, strlen($nullterminatedstring) - 1);
		}
		return $nullterminatedstring;
	}

	function Pascal2String($pascalstring) {
		// Pascal strings have 1 unsigned byte at the beginning saying how many chars (1-255) are in the string
		return substr($pascalstring, 1);
	}

}

?>