示例#1
0
 /**
  * @param  type    $atomname
  * @param  type    $atomsize
  * @param  type    $atom_data
  * @param  type    $baseoffset
  * @param  type    $atomHierarchy
  * @param  type    $ParseAllPossibleAtoms
  *
  * @return bool
  *
  * @link http://developer.apple.com/techpubs/quicktime/qtdevdocs/APIREF/INDEX/atomalphaindex.htm
  */
 public function QuicktimeParseAtom($atomname, $atomsize, $atom_data, $baseoffset, &$atomHierarchy, $ParseAllPossibleAtoms)
 {
     $info =& $this->getid3->info;
     $atom_parent = array_pop($atomHierarchy);
     array_push($atomHierarchy, $atomname);
     $atom_structure['hierarchy'] = implode(' ', $atomHierarchy);
     $atom_structure['name'] = $atomname;
     $atom_structure['size'] = $atomsize;
     $atom_structure['offset'] = $baseoffset;
     //echo GetId3_lib::PrintHexBytes(substr($atom_data, 0, 8)).'<br>';
     //echo GetId3_lib::PrintHexBytes(substr($atom_data, 0, 8), false).'<br><br>';
     switch ($atomname) {
         case 'moov':
             // MOVie container atom
         // MOVie container atom
         case 'trak':
             // TRAcK container atom
         // TRAcK container atom
         case 'clip':
             // CLIPping container atom
         // CLIPping container atom
         case 'matt':
             // track MATTe container atom
         // track MATTe container atom
         case 'edts':
             // EDiTS container atom
         // EDiTS container atom
         case 'tref':
             // Track REFerence container atom
         // Track REFerence container atom
         case 'mdia':
             // MeDIA container atom
         // MeDIA container atom
         case 'minf':
             // Media INFormation container atom
         // Media INFormation container atom
         case 'dinf':
             // Data INFormation container atom
         // Data INFormation container atom
         case 'udta':
             // User DaTA container atom
         // User DaTA container atom
         case 'cmov':
             // Compressed MOVie container atom
         // Compressed MOVie container atom
         case 'rmra':
             // Reference Movie Record Atom
         // Reference Movie Record Atom
         case 'rmda':
             // Reference Movie Descriptor Atom
         // Reference Movie Descriptor Atom
         case 'gmhd':
             // Generic Media info HeaDer atom (seen on QTVR)
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             break;
         case 'ilst':
             // Item LiST container atom
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             // some "ilst" atoms contain data atoms that have a numeric name, and the data is far more accessible if the returned array is compacted
             $allnumericnames = true;
             foreach ($atom_structure['subatoms'] as $subatomarray) {
                 if (!is_int($subatomarray['name']) || count($subatomarray['subatoms']) != 1) {
                     $allnumericnames = false;
                     break;
                 }
             }
             if ($allnumericnames) {
                 $newData = array();
                 foreach ($atom_structure['subatoms'] as $subatomarray) {
                     foreach ($subatomarray['subatoms'] as $newData_subatomarray) {
                         unset($newData_subatomarray['hierarchy'], $newData_subatomarray['name']);
                         $newData[$subatomarray['name']] = $newData_subatomarray;
                         break;
                     }
                 }
                 $atom_structure['data'] = $newData;
                 unset($atom_structure['subatoms']);
             }
             break;
         case "":
         case "":
         case "":
         case "":
         case "":
             $atomname = Helper::BigEndian2Int($atomname);
             $atom_structure['name'] = $atomname;
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             break;
         case 'stbl':
             // Sample TaBLe container atom
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             $isVideo = false;
             $framerate = 0;
             $framecount = 0;
             foreach ($atom_structure['subatoms'] as $key => $value_array) {
                 if (isset($value_array['sample_description_table'])) {
                     foreach ($value_array['sample_description_table'] as $key2 => $value_array2) {
                         if (isset($value_array2['data_format'])) {
                             switch ($value_array2['data_format']) {
                                 case 'avc1':
                                 case 'mp4v':
                                     // video data
                                     $isVideo = true;
                                     break;
                                 case 'mp4a':
                                     // audio data
                                     break;
                             }
                         }
                     }
                 } elseif (isset($value_array['time_to_sample_table'])) {
                     foreach ($value_array['time_to_sample_table'] as $key2 => $value_array2) {
                         if (isset($value_array2['sample_count']) && isset($value_array2['sample_duration']) && $value_array2['sample_duration'] > 0) {
                             $framerate = round($info['quicktime']['time_scale'] / $value_array2['sample_duration'], 3);
                             $framecount = $value_array2['sample_count'];
                         }
                     }
                 }
             }
             if ($isVideo && $framerate) {
                 $info['quicktime']['video']['frame_rate'] = $framerate;
                 $info['video']['frame_rate'] = $info['quicktime']['video']['frame_rate'];
             }
             if ($isVideo && $framecount) {
                 $info['quicktime']['video']['frame_count'] = $framecount;
             }
             break;
         case 'aART':
             // Album ARTist
         // Album ARTist
         case 'catg':
             // CaTeGory
         // CaTeGory
         case 'covr':
             // COVeR artwork
         // COVeR artwork
         case 'cpil':
             // ComPILation
         // ComPILation
         case 'cprt':
             // CoPyRighT
         // CoPyRighT
         case 'desc':
             // DESCription
         // DESCription
         case 'disk':
             // DISK number
         // DISK number
         case 'egid':
             // Episode Global ID
         // Episode Global ID
         case 'gnre':
             // GeNRE
         // GeNRE
         case 'keyw':
             // KEYWord
         // KEYWord
         case 'ldes':
         case 'pcst':
             // PodCaST
         // PodCaST
         case 'pgap':
             // GAPless Playback
         // GAPless Playback
         case 'purd':
             // PURchase Date
         // PURchase Date
         case 'purl':
             // Podcast URL
         // Podcast URL
         case 'rati':
         case 'rndu':
         case 'rpdu':
         case 'rtng':
             // RaTiNG
         // RaTiNG
         case 'stik':
         case 'tmpo':
             // TeMPO (BPM)
         // TeMPO (BPM)
         case 'trkn':
             // TRacK Number
         // TRacK Number
         case 'tves':
             // TV EpiSode
         // TV EpiSode
         case 'tvnn':
             // TV Network Name
         // TV Network Name
         case 'tvsh':
             // TV SHow Name
         // TV SHow Name
         case 'tvsn':
             // TV SeasoN
         // TV SeasoN
         case 'akID':
             // iTunes store account type
         // iTunes store account type
         case 'apID':
         case 'atID':
         case 'cmID':
         case 'cnID':
         case 'geID':
         case 'plID':
         case 'sfID':
             // iTunes store country
         // iTunes store country
         case '©alb':
             // ALBum
         // ALBum
         case '©art':
             // ARTist
         // ARTist
         case '©ART':
         case '©aut':
         case '©cmt':
             // CoMmenT
         // CoMmenT
         case '©com':
             // COMposer
         // COMposer
         case '©cpy':
         case '©day':
             // content created year
         // content created year
         case '©dir':
         case '©ed1':
         case '©ed2':
         case '©ed3':
         case '©ed4':
         case '©ed5':
         case '©ed6':
         case '©ed7':
         case '©ed8':
         case '©ed9':
         case '©enc':
         case '©fmt':
         case '©gen':
             // GENre
         // GENre
         case '©grp':
             // GRouPing
         // GRouPing
         case '©hst':
         case '©inf':
         case '©lyr':
             // LYRics
         // LYRics
         case '©mak':
         case '©mod':
         case '©nam':
             // full NAMe
         // full NAMe
         case '©ope':
         case '©PRD':
         case '©prd':
         case '©prf':
         case '©req':
         case '©src':
         case '©swr':
         case '©too':
             // encoder
         // encoder
         case '©trk':
             // TRacK
         // TRacK
         case '©url':
         case '©wrn':
         case '©wrt':
             // WRiTer
         // WRiTer
         case '----':
             // itunes specific
             if ($atom_parent == 'udta') {
                 // User data atom handler
                 $atom_structure['data_length'] = Helper::BigEndian2Int(substr($atom_data, 0, 2));
                 $atom_structure['language_id'] = Helper::BigEndian2Int(substr($atom_data, 2, 2));
                 $atom_structure['data'] = substr($atom_data, 4);
                 $atom_structure['language'] = $this->QuicktimeLanguageLookup($atom_structure['language_id']);
                 if (empty($info['comments']['language']) || !in_array($atom_structure['language'], $info['comments']['language'])) {
                     $info['comments']['language'][] = $atom_structure['language'];
                 }
             } else {
                 // Apple item list box atom handler
                 $atomoffset = 0;
                 if (substr($atom_data, 2, 2) == "�") {
                     // not sure what it means, but observed on iPhone4 data.
                     // Each $atom_data has 2 bytes of datasize, plus 0x10B5, then data
                     while ($atomoffset < strlen($atom_data)) {
                         $boxsmallsize = Helper::BigEndian2Int(substr($atom_data, $atomoffset, 2));
                         $boxsmalltype = substr($atom_data, $atomoffset + 2, 2);
                         $boxsmalldata = substr($atom_data, $atomoffset + 4, $boxsmallsize);
                         switch ($boxsmalltype) {
                             case "�":
                                 $atom_structure['data'] = $boxsmalldata;
                                 break;
                             default:
                                 $info['warning'][] = 'Unknown QuickTime smallbox type: "' . Helper::PrintHexBytes($boxsmalltype) . '" at offset ' . $baseoffset;
                                 $atom_structure['data'] = $atom_data;
                                 break;
                         }
                         $atomoffset += 4 + $boxsmallsize;
                     }
                 } else {
                     while ($atomoffset < strlen($atom_data)) {
                         $boxsize = Helper::BigEndian2Int(substr($atom_data, $atomoffset, 4));
                         $boxtype = substr($atom_data, $atomoffset + 4, 4);
                         $boxdata = substr($atom_data, $atomoffset + 8, $boxsize - 8);
                         if ($boxsize <= 1) {
                             $info['warning'][] = 'Invalid QuickTime atom box size "' . $boxsize . '" in atom "' . $atomname . '" at offset: ' . ($atom_structure['offset'] + $atomoffset);
                             $atom_structure['data'] = null;
                             $atomoffset = strlen($atom_data);
                             break;
                         }
                         $atomoffset += $boxsize;
                         switch ($boxtype) {
                             case 'mean':
                             case 'name':
                                 $atom_structure[$boxtype] = substr($boxdata, 4);
                                 break;
                             case 'data':
                                 $atom_structure['version'] = Helper::BigEndian2Int(substr($boxdata, 0, 1));
                                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($boxdata, 1, 3));
                                 switch ($atom_structure['flags_raw']) {
                                     case 0:
                                         // data flag
                                     // data flag
                                     case 21:
                                         // tmpo/cpil flag
                                         switch ($atomname) {
                                             case 'cpil':
                                             case 'pcst':
                                             case 'pgap':
                                                 $atom_structure['data'] = Helper::BigEndian2Int(substr($boxdata, 8, 1));
                                                 break;
                                             case 'tmpo':
                                                 $atom_structure['data'] = Helper::BigEndian2Int(substr($boxdata, 8, 2));
                                                 break;
                                             case 'disk':
                                             case 'trkn':
                                                 $num = Helper::BigEndian2Int(substr($boxdata, 10, 2));
                                                 $num_total = Helper::BigEndian2Int(substr($boxdata, 12, 2));
                                                 $atom_structure['data'] = empty($num) ? '' : $num;
                                                 $atom_structure['data'] .= empty($num_total) ? '' : '/' . $num_total;
                                                 break;
                                             case 'gnre':
                                                 $GenreID = Helper::BigEndian2Int(substr($boxdata, 8, 4));
                                                 $atom_structure['data'] = Module\Tag\Id3v1::LookupGenreName($GenreID - 1);
                                                 break;
                                             case 'rtng':
                                                 $atom_structure[$atomname] = Helper::BigEndian2Int(substr($boxdata, 8, 1));
                                                 $atom_structure['data'] = $this->QuicktimeContentRatingLookup($atom_structure[$atomname]);
                                                 break;
                                             case 'stik':
                                                 $atom_structure[$atomname] = Helper::BigEndian2Int(substr($boxdata, 8, 1));
                                                 $atom_structure['data'] = $this->QuicktimeSTIKLookup($atom_structure[$atomname]);
                                                 break;
                                             case 'sfID':
                                                 $atom_structure[$atomname] = Helper::BigEndian2Int(substr($boxdata, 8, 4));
                                                 $atom_structure['data'] = $this->QuicktimeStoreFrontCodeLookup($atom_structure[$atomname]);
                                                 break;
                                             case 'egid':
                                             case 'purl':
                                                 $atom_structure['data'] = substr($boxdata, 8);
                                                 break;
                                             default:
                                                 $atom_structure['data'] = Helper::BigEndian2Int(substr($boxdata, 8, 4));
                                         }
                                         break;
                                     case 1:
                                         // text flag
                                     // text flag
                                     case 13:
                                         // image flag
                                     // image flag
                                     default:
                                         $atom_structure['data'] = substr($boxdata, 8);
                                         break;
                                 }
                                 break;
                             default:
                                 $info['warning'][] = 'Unknown QuickTime box type: "' . Helper::PrintHexBytes($boxtype) . '" at offset ' . $baseoffset;
                                 $atom_structure['data'] = $atom_data;
                         }
                     }
                 }
             }
             $this->CopyToAppropriateCommentsSection($atomname, $atom_structure['data'], $atom_structure['name']);
             break;
         case 'play':
             // auto-PLAY atom
             $atom_structure['autoplay'] = (bool) Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $info['quicktime']['autoplay'] = $atom_structure['autoplay'];
             break;
         case 'WLOC':
             // Window LOCation atom
             $atom_structure['location_x'] = Helper::BigEndian2Int(substr($atom_data, 0, 2));
             $atom_structure['location_y'] = Helper::BigEndian2Int(substr($atom_data, 2, 2));
             break;
         case 'LOOP':
             // LOOPing atom
         // LOOPing atom
         case 'SelO':
             // play SELection Only atom
         // play SELection Only atom
         case 'AllF':
             // play ALL Frames atom
             $atom_structure['data'] = Helper::BigEndian2Int($atom_data);
             break;
         case 'name':
             //
         //
         case 'MCPS':
             // Media Cleaner PRo
         // Media Cleaner PRo
         case '@PRM':
             // adobe PReMiere version
         // adobe PReMiere version
         case '@PRQ':
             // adobe PRemiere Quicktime version
             $atom_structure['data'] = $atom_data;
             break;
         case 'cmvd':
             // Compressed MooV Data atom
             // Code by ubergeekØubergeek*tv based on information from
             // http://developer.apple.com/quicktime/icefloe/dispatch012.html
             $atom_structure['unCompressedSize'] = Helper::BigEndian2Int(substr($atom_data, 0, 4));
             $CompressedFileData = substr($atom_data, 4);
             if ($UncompressedHeader = @gzuncompress($CompressedFileData)) {
                 $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($UncompressedHeader, 0, $atomHierarchy, $ParseAllPossibleAtoms);
             } else {
                 $info['warning'][] = 'Error decompressing compressed MOV atom at offset ' . $atom_structure['offset'];
             }
             break;
         case 'dcom':
             // Data COMpression atom
             $atom_structure['compression_id'] = $atom_data;
             $atom_structure['compression_text'] = $this->QuicktimeDCOMLookup($atom_data);
             break;
         case 'rdrf':
             // Reference movie Data ReFerence atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             $atom_structure['flags']['internal_data'] = (bool) ($atom_structure['flags_raw'] & 0x1);
             $atom_structure['reference_type_name'] = substr($atom_data, 4, 4);
             $atom_structure['reference_length'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             switch ($atom_structure['reference_type_name']) {
                 case 'url ':
                     $atom_structure['url'] = $this->NoNullString(substr($atom_data, 12));
                     break;
                 case 'alis':
                     $atom_structure['file_alias'] = substr($atom_data, 12);
                     break;
                 case 'rsrc':
                     $atom_structure['resource_alias'] = substr($atom_data, 12);
                     break;
                 default:
                     $atom_structure['data'] = substr($atom_data, 12);
                     break;
             }
             break;
         case 'rmqu':
             // Reference Movie QUality atom
             $atom_structure['movie_quality'] = Helper::BigEndian2Int($atom_data);
             break;
         case 'rmcs':
             // Reference Movie Cpu Speed atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['cpu_speed_rating'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             break;
         case 'rmvc':
             // Reference Movie Version Check atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['gestalt_selector'] = substr($atom_data, 4, 4);
             $atom_structure['gestalt_value_mask'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             $atom_structure['gestalt_value'] = Helper::BigEndian2Int(substr($atom_data, 12, 4));
             $atom_structure['gestalt_check_type'] = Helper::BigEndian2Int(substr($atom_data, 14, 2));
             break;
         case 'rmcd':
             // Reference Movie Component check atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['component_type'] = substr($atom_data, 4, 4);
             $atom_structure['component_subtype'] = substr($atom_data, 8, 4);
             $atom_structure['component_manufacturer'] = substr($atom_data, 12, 4);
             $atom_structure['component_flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 16, 4));
             $atom_structure['component_flags_mask'] = Helper::BigEndian2Int(substr($atom_data, 20, 4));
             $atom_structure['component_min_version'] = Helper::BigEndian2Int(substr($atom_data, 24, 4));
             break;
         case 'rmdr':
             // Reference Movie Data Rate atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['data_rate'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['data_rate_bps'] = $atom_structure['data_rate'] * 10;
             break;
         case 'rmla':
             // Reference Movie Language Atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['language_id'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             $atom_structure['language'] = $this->QuicktimeLanguageLookup($atom_structure['language_id']);
             if (empty($info['comments']['language']) || !in_array($atom_structure['language'], $info['comments']['language'])) {
                 $info['comments']['language'][] = $atom_structure['language'];
             }
             break;
         case 'rmla':
             // Reference Movie Language Atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['track_id'] = Helper::BigEndian2Int(substr($atom_data, 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
             $atom_structure['display_size_raw'] = Helper::BigEndian2Int(substr($atom_data, 0, 2));
             $atom_structure['reserved_1'] = Helper::BigEndian2Int(substr($atom_data, 2, 2));
             // hardcoded: 0x0000
             $atom_structure['reserved_2'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             // hardcoded: 0x0000
             $atom_structure['slide_show_flag'] = Helper::BigEndian2Int(substr($atom_data, 6, 1));
             $atom_structure['play_on_open_flag'] = Helper::BigEndian2Int(substr($atom_data, 7, 1));
             $atom_structure['flags']['play_on_open'] = (bool) $atom_structure['play_on_open_flag'];
             $atom_structure['flags']['slide_show'] = (bool) $atom_structure['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[$atom_structure['display_size_raw']])) {
                 $atom_structure['display_size'] = $ptv_lookup[$atom_structure['display_size_raw']];
             } else {
                 $info['warning'][] = 'unknown "ptv " display constant (' . $atom_structure['display_size_raw'] . ')';
             }
             break;
         case 'stsd':
             // Sample Table Sample Description atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $stsdEntriesDataOffset = 8;
             for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                 $atom_structure['sample_description_table'][$i]['size'] = Helper::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 4));
                 $stsdEntriesDataOffset += 4;
                 $atom_structure['sample_description_table'][$i]['data_format'] = substr($atom_data, $stsdEntriesDataOffset, 4);
                 $stsdEntriesDataOffset += 4;
                 $atom_structure['sample_description_table'][$i]['reserved'] = Helper::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 6));
                 $stsdEntriesDataOffset += 6;
                 $atom_structure['sample_description_table'][$i]['reference_index'] = Helper::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 2));
                 $stsdEntriesDataOffset += 2;
                 $atom_structure['sample_description_table'][$i]['data'] = substr($atom_data, $stsdEntriesDataOffset, $atom_structure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2);
                 $stsdEntriesDataOffset += $atom_structure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2;
                 $atom_structure['sample_description_table'][$i]['encoder_version'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 0, 2));
                 $atom_structure['sample_description_table'][$i]['encoder_revision'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 2, 2));
                 $atom_structure['sample_description_table'][$i]['encoder_vendor'] = substr($atom_structure['sample_description_table'][$i]['data'], 4, 4);
                 switch ($atom_structure['sample_description_table'][$i]['encoder_vendor']) {
                     case "":
                         // audio atom
                         $atom_structure['sample_description_table'][$i]['audio_channels'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 8, 2));
                         $atom_structure['sample_description_table'][$i]['audio_bit_depth'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 10, 2));
                         $atom_structure['sample_description_table'][$i]['audio_compression_id'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 12, 2));
                         $atom_structure['sample_description_table'][$i]['audio_packet_size'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 14, 2));
                         $atom_structure['sample_description_table'][$i]['audio_sample_rate'] = Helper::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 16, 4));
                         switch ($atom_structure['sample_description_table'][$i]['data_format']) {
                             case 'avc1':
                             case 'mp4v':
                                 $info['fileformat'] = 'mp4';
                                 $info['video']['fourcc'] = $atom_structure['sample_description_table'][$i]['data_format'];
                                 //$info['warning'][] = 'This version of GetId3Core() ['.$this->getid3->version().'] does not fully support MPEG-4 audio/video streams'; // 2011-02-18: why am I warning about this again? What's not supported?
                                 break;
                             case 'qtvr':
                                 $info['video']['dataformat'] = 'quicktimevr';
                                 break;
                             case 'mp4a':
                             default:
                                 $info['quicktime']['audio']['codec'] = $this->QuicktimeAudioCodecLookup($atom_structure['sample_description_table'][$i]['data_format']);
                                 $info['quicktime']['audio']['sample_rate'] = $atom_structure['sample_description_table'][$i]['audio_sample_rate'];
                                 $info['quicktime']['audio']['channels'] = $atom_structure['sample_description_table'][$i]['audio_channels'];
                                 $info['quicktime']['audio']['bit_depth'] = $atom_structure['sample_description_table'][$i]['audio_bit_depth'];
                                 $info['audio']['codec'] = $info['quicktime']['audio']['codec'];
                                 $info['audio']['sample_rate'] = $info['quicktime']['audio']['sample_rate'];
                                 $info['audio']['channels'] = $info['quicktime']['audio']['channels'];
                                 $info['audio']['bits_per_sample'] = $info['quicktime']['audio']['bit_depth'];
                                 switch ($atom_structure['sample_description_table'][$i]['data_format']) {
                                     case 'raw ':
                                         // PCM
                                     // PCM
                                     case 'alac':
                                         // Apple Lossless Audio Codec
                                         $info['audio']['lossless'] = true;
                                         break;
                                     default:
                                         $info['audio']['lossless'] = false;
                                         break;
                                 }
                                 break;
                         }
                         break;
                     default:
                         switch ($atom_structure['sample_description_table'][$i]['data_format']) {
                             case 'mp4s':
                                 $info['fileformat'] = 'mp4';
                                 break;
                             default:
                                 // video atom
                                 $atom_structure['sample_description_table'][$i]['video_temporal_quality'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 8, 4));
                                 $atom_structure['sample_description_table'][$i]['video_spatial_quality'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 12, 4));
                                 $atom_structure['sample_description_table'][$i]['video_frame_width'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 16, 2));
                                 $atom_structure['sample_description_table'][$i]['video_frame_height'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 18, 2));
                                 $atom_structure['sample_description_table'][$i]['video_resolution_x'] = Helper::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 20, 4));
                                 $atom_structure['sample_description_table'][$i]['video_resolution_y'] = Helper::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 24, 4));
                                 $atom_structure['sample_description_table'][$i]['video_data_size'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 28, 4));
                                 $atom_structure['sample_description_table'][$i]['video_frame_count'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 32, 2));
                                 $atom_structure['sample_description_table'][$i]['video_encoder_name_len'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 34, 1));
                                 $atom_structure['sample_description_table'][$i]['video_encoder_name'] = substr($atom_structure['sample_description_table'][$i]['data'], 35, $atom_structure['sample_description_table'][$i]['video_encoder_name_len']);
                                 $atom_structure['sample_description_table'][$i]['video_pixel_color_depth'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 66, 2));
                                 $atom_structure['sample_description_table'][$i]['video_color_table_id'] = Helper::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 68, 2));
                                 $atom_structure['sample_description_table'][$i]['video_pixel_color_type'] = $atom_structure['sample_description_table'][$i]['video_pixel_color_depth'] > 32 ? 'grayscale' : 'color';
                                 $atom_structure['sample_description_table'][$i]['video_pixel_color_name'] = $this->QuicktimeColorNameLookup($atom_structure['sample_description_table'][$i]['video_pixel_color_depth']);
                                 if ($atom_structure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
                                     $info['quicktime']['video']['codec_fourcc'] = $atom_structure['sample_description_table'][$i]['data_format'];
                                     $info['quicktime']['video']['codec_fourcc_lookup'] = $this->QuicktimeVideoCodecLookup($atom_structure['sample_description_table'][$i]['data_format']);
                                     $info['quicktime']['video']['codec'] = $atom_structure['sample_description_table'][$i]['video_encoder_name_len'] > 0 ? $atom_structure['sample_description_table'][$i]['video_encoder_name'] : $atom_structure['sample_description_table'][$i]['data_format'];
                                     $info['quicktime']['video']['color_depth'] = $atom_structure['sample_description_table'][$i]['video_pixel_color_depth'];
                                     $info['quicktime']['video']['color_depth_name'] = $atom_structure['sample_description_table'][$i]['video_pixel_color_name'];
                                     $info['video']['codec'] = $info['quicktime']['video']['codec'];
                                     $info['video']['bits_per_sample'] = $info['quicktime']['video']['color_depth'];
                                 }
                                 $info['video']['lossless'] = false;
                                 $info['video']['pixel_aspect_ratio'] = (double) 1;
                                 break;
                         }
                         break;
                 }
                 switch (strtolower($atom_structure['sample_description_table'][$i]['data_format'])) {
                     case 'mp4a':
                         $info['audio']['dataformat'] = 'mp4';
                         $info['quicktime']['audio']['codec'] = 'mp4';
                         break;
                     case '3ivx':
                     case '3iv1':
                     case '3iv2':
                         $info['video']['dataformat'] = '3ivx';
                         break;
                     case 'xvid':
                         $info['video']['dataformat'] = 'xvid';
                         break;
                     case 'mp4v':
                         $info['video']['dataformat'] = 'mpeg4';
                         break;
                     case 'divx':
                     case 'div1':
                     case 'div2':
                     case 'div3':
                     case 'div4':
                     case 'div5':
                     case 'div6':
                         $info['video']['dataformat'] = 'divx';
                         break;
                     default:
                         // do nothing
                         break;
                 }
                 unset($atom_structure['sample_description_table'][$i]['data']);
             }
             break;
         case 'stts':
             // Sample Table Time-to-Sample atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $sttsEntriesDataOffset = 8;
             //$FrameRateCalculatorArray = array();
             $frames_count = 0;
             for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                 $atom_structure['time_to_sample_table'][$i]['sample_count'] = Helper::BigEndian2Int(substr($atom_data, $sttsEntriesDataOffset, 4));
                 $sttsEntriesDataOffset += 4;
                 $atom_structure['time_to_sample_table'][$i]['sample_duration'] = Helper::BigEndian2Int(substr($atom_data, $sttsEntriesDataOffset, 4));
                 $sttsEntriesDataOffset += 4;
                 $frames_count += $atom_structure['time_to_sample_table'][$i]['sample_count'];
                 // THIS SECTION REPLACED WITH CODE IN "stbl" ATOM
                 //if (!empty($info['quicktime']['time_scale']) && ($atom_structure['time_to_sample_table'][$i]['sample_duration'] > 0)) {
                 //	$stts_new_framerate = $info['quicktime']['time_scale'] / $atom_structure['time_to_sample_table'][$i]['sample_duration'];
                 //	if ($stts_new_framerate <= 60) {
                 //		// some atoms have durations of "1" giving a very large framerate, which probably is not right
                 //		$info['video']['frame_rate'] = max($info['video']['frame_rate'], $stts_new_framerate);
                 //	}
                 //}
                 //
                 //$FrameRateCalculatorArray[($info['quicktime']['time_scale'] / $atom_structure['time_to_sample_table'][$i]['sample_duration'])] += $atom_structure['time_to_sample_table'][$i]['sample_count'];
             }
             $info['quicktime']['stts_framecount'][] = $frames_count;
             //$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) > $info['video']['frame_rate']) {
             //		$info['video']['frame_rate'] = $sttsFramesTotal / $sttsSecondsTotal;
             //	}
             //}
             break;
         case 'stss':
             // Sample Table Sync Sample (key frames) atom
             if ($ParseAllPossibleAtoms) {
                 $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
                 // hardcoded: 0x0000
                 $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
                 $stssEntriesDataOffset = 8;
                 for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                     $atom_structure['time_to_sample_table'][$i] = Helper::BigEndian2Int(substr($atom_data, $stssEntriesDataOffset, 4));
                     $stssEntriesDataOffset += 4;
                 }
             }
             break;
         case 'stsc':
             // Sample Table Sample-to-Chunk atom
             if ($ParseAllPossibleAtoms) {
                 $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
                 // hardcoded: 0x0000
                 $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
                 $stscEntriesDataOffset = 8;
                 for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                     $atom_structure['sample_to_chunk_table'][$i]['first_chunk'] = Helper::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
                     $stscEntriesDataOffset += 4;
                     $atom_structure['sample_to_chunk_table'][$i]['samples_per_chunk'] = Helper::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
                     $stscEntriesDataOffset += 4;
                     $atom_structure['sample_to_chunk_table'][$i]['sample_description'] = Helper::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
                     $stscEntriesDataOffset += 4;
                 }
             }
             break;
         case 'stsz':
             // Sample Table SiZe atom
             if ($ParseAllPossibleAtoms) {
                 $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
                 // hardcoded: 0x0000
                 $atom_structure['sample_size'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
                 $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
                 $stszEntriesDataOffset = 12;
                 if ($atom_structure['sample_size'] == 0) {
                     for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                         $atom_structure['sample_size_table'][$i] = Helper::BigEndian2Int(substr($atom_data, $stszEntriesDataOffset, 4));
                         $stszEntriesDataOffset += 4;
                     }
                 }
             }
             break;
         case 'stco':
             // Sample Table Chunk Offset atom
             if ($ParseAllPossibleAtoms) {
                 $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
                 // hardcoded: 0x0000
                 $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
                 $stcoEntriesDataOffset = 8;
                 for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                     $atom_structure['chunk_offset_table'][$i] = Helper::BigEndian2Int(substr($atom_data, $stcoEntriesDataOffset, 4));
                     $stcoEntriesDataOffset += 4;
                 }
             }
             break;
         case 'co64':
             // Chunk Offset 64-bit (version of "stco" that supports > 2GB files)
             if ($ParseAllPossibleAtoms) {
                 $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
                 $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
                 // hardcoded: 0x0000
                 $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
                 $stcoEntriesDataOffset = 8;
                 for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                     $atom_structure['chunk_offset_table'][$i] = Helper::BigEndian2Int(substr($atom_data, $stcoEntriesDataOffset, 8));
                     $stcoEntriesDataOffset += 8;
                 }
             }
             break;
         case 'dref':
             // Data REFerence atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $drefDataOffset = 8;
             for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                 $atom_structure['data_references'][$i]['size'] = Helper::BigEndian2Int(substr($atom_data, $drefDataOffset, 4));
                 $drefDataOffset += 4;
                 $atom_structure['data_references'][$i]['type'] = substr($atom_data, $drefDataOffset, 4);
                 $drefDataOffset += 4;
                 $atom_structure['data_references'][$i]['version'] = Helper::BigEndian2Int(substr($atom_data, $drefDataOffset, 1));
                 $drefDataOffset += 1;
                 $atom_structure['data_references'][$i]['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, $drefDataOffset, 3));
                 // hardcoded: 0x0000
                 $drefDataOffset += 3;
                 $atom_structure['data_references'][$i]['data'] = substr($atom_data, $drefDataOffset, $atom_structure['data_references'][$i]['size'] - 4 - 4 - 1 - 3);
                 $drefDataOffset += $atom_structure['data_references'][$i]['size'] - 4 - 4 - 1 - 3;
                 $atom_structure['data_references'][$i]['flags']['self_reference'] = (bool) ($atom_structure['data_references'][$i]['flags_raw'] & 0x1);
             }
             break;
         case 'gmin':
             // base Media INformation atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['graphics_mode'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             $atom_structure['opcolor_red'] = Helper::BigEndian2Int(substr($atom_data, 6, 2));
             $atom_structure['opcolor_green'] = Helper::BigEndian2Int(substr($atom_data, 8, 2));
             $atom_structure['opcolor_blue'] = Helper::BigEndian2Int(substr($atom_data, 10, 2));
             $atom_structure['balance'] = Helper::BigEndian2Int(substr($atom_data, 12, 2));
             $atom_structure['reserved'] = Helper::BigEndian2Int(substr($atom_data, 14, 2));
             break;
         case 'smhd':
             // Sound Media information HeaDer atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['balance'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             $atom_structure['reserved'] = Helper::BigEndian2Int(substr($atom_data, 6, 2));
             break;
         case 'vmhd':
             // Video Media information HeaDer atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             $atom_structure['graphics_mode'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             $atom_structure['opcolor_red'] = Helper::BigEndian2Int(substr($atom_data, 6, 2));
             $atom_structure['opcolor_green'] = Helper::BigEndian2Int(substr($atom_data, 8, 2));
             $atom_structure['opcolor_blue'] = Helper::BigEndian2Int(substr($atom_data, 10, 2));
             $atom_structure['flags']['no_lean_ahead'] = (bool) ($atom_structure['flags_raw'] & 0x1);
             break;
         case 'hdlr':
             // HanDLeR reference atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['component_type'] = substr($atom_data, 4, 4);
             $atom_structure['component_subtype'] = substr($atom_data, 8, 4);
             $atom_structure['component_manufacturer'] = substr($atom_data, 12, 4);
             $atom_structure['component_flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 16, 4));
             $atom_structure['component_flags_mask'] = Helper::BigEndian2Int(substr($atom_data, 20, 4));
             $atom_structure['component_name'] = $this->Pascal2String(substr($atom_data, 24));
             if ($atom_structure['component_subtype'] == 'STpn' && $atom_structure['component_manufacturer'] == 'zzzz') {
                 $info['video']['dataformat'] = 'quicktimevr';
             }
             break;
         case 'mdhd':
             // MeDia HeaDer atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['creation_time'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['modify_time'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             $atom_structure['time_scale'] = Helper::BigEndian2Int(substr($atom_data, 12, 4));
             $atom_structure['duration'] = Helper::BigEndian2Int(substr($atom_data, 16, 4));
             $atom_structure['language_id'] = Helper::BigEndian2Int(substr($atom_data, 20, 2));
             $atom_structure['quality'] = Helper::BigEndian2Int(substr($atom_data, 22, 2));
             if ($atom_structure['time_scale'] == 0) {
                 $info['error'][] = 'Corrupt Quicktime file: mdhd.time_scale == zero';
                 return false;
             }
             $info['quicktime']['time_scale'] = isset($info['quicktime']['time_scale']) ? max($info['quicktime']['time_scale'], $atom_structure['time_scale']) : $atom_structure['time_scale'];
             $atom_structure['creation_time_unix'] = Helper::DateMac2Unix($atom_structure['creation_time']);
             $atom_structure['modify_time_unix'] = Helper::DateMac2Unix($atom_structure['modify_time']);
             $atom_structure['playtime_seconds'] = $atom_structure['duration'] / $atom_structure['time_scale'];
             $atom_structure['language'] = $this->QuicktimeLanguageLookup($atom_structure['language_id']);
             if (empty($info['comments']['language']) || !in_array($atom_structure['language'], $info['comments']['language'])) {
                 $info['comments']['language'][] = $atom_structure['language'];
             }
             break;
         case 'pnot':
             // Preview atom
             $atom_structure['modification_date'] = Helper::BigEndian2Int(substr($atom_data, 0, 4));
             // "standard Macintosh format"
             $atom_structure['version_number'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             // hardcoded: 0x00
             $atom_structure['atom_type'] = substr($atom_data, 6, 4);
             // usually: 'PICT'
             $atom_structure['atom_index'] = Helper::BigEndian2Int(substr($atom_data, 10, 2));
             // usually: 0x01
             $atom_structure['modification_date_unix'] = Helper::DateMac2Unix($atom_structure['modification_date']);
             break;
         case 'crgn':
             // Clipping ReGioN atom
             $atom_structure['region_size'] = Helper::BigEndian2Int(substr($atom_data, 0, 2));
             // The Region size, Region boundary box,
             $atom_structure['boundary_box'] = Helper::BigEndian2Int(substr($atom_data, 2, 8));
             // and Clipping region data fields
             $atom_structure['clipping_data'] = substr($atom_data, 10);
             // constitute a QuickDraw region.
             break;
         case 'load':
             // track LOAD settings atom
             $atom_structure['preload_start_time'] = Helper::BigEndian2Int(substr($atom_data, 0, 4));
             $atom_structure['preload_duration'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['preload_flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             $atom_structure['default_hints_raw'] = Helper::BigEndian2Int(substr($atom_data, 12, 4));
             $atom_structure['default_hints']['double_buffer'] = (bool) ($atom_structure['default_hints_raw'] & 0x20);
             $atom_structure['default_hints']['high_quality'] = (bool) ($atom_structure['default_hints_raw'] & 0x100);
             break;
         case 'tmcd':
             // TiMe CoDe atom
         // TiMe CoDe atom
         case 'chap':
             // CHAPter list atom
         // CHAPter list atom
         case 'sync':
             // SYNChronization atom
         // SYNChronization atom
         case 'scpt':
             // tranSCriPT atom
         // tranSCriPT atom
         case 'ssrc':
             // non-primary SouRCe atom
             for ($i = 0; $i < strlen($atom_data) % 4; ++$i) {
                 $atom_structure['track_id'][$i] = Helper::BigEndian2Int(substr($atom_data, $i * 4, 4));
             }
             break;
         case 'elst':
             // Edit LiST atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['number_entries'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             for ($i = 0; $i < $atom_structure['number_entries']; ++$i) {
                 $atom_structure['edit_list'][$i]['track_duration'] = Helper::BigEndian2Int(substr($atom_data, 8 + $i * 12 + 0, 4));
                 $atom_structure['edit_list'][$i]['media_time'] = Helper::BigEndian2Int(substr($atom_data, 8 + $i * 12 + 4, 4));
                 $atom_structure['edit_list'][$i]['media_rate'] = Helper::FixedPoint16_16(substr($atom_data, 8 + $i * 12 + 8, 4));
             }
             break;
         case 'kmat':
             // compressed MATte atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             // hardcoded: 0x0000
             $atom_structure['matte_data_raw'] = substr($atom_data, 4);
             break;
         case 'ctab':
             // Color TABle atom
             $atom_structure['color_table_seed'] = Helper::BigEndian2Int(substr($atom_data, 0, 4));
             // hardcoded: 0x00000000
             $atom_structure['color_table_flags'] = Helper::BigEndian2Int(substr($atom_data, 4, 2));
             // hardcoded: 0x8000
             $atom_structure['color_table_size'] = Helper::BigEndian2Int(substr($atom_data, 6, 2)) + 1;
             for ($colortableentry = 0; $colortableentry < $atom_structure['color_table_size']; ++$colortableentry) {
                 $atom_structure['color_table'][$colortableentry]['alpha'] = Helper::BigEndian2Int(substr($atom_data, 8 + $colortableentry * 8 + 0, 2));
                 $atom_structure['color_table'][$colortableentry]['red'] = Helper::BigEndian2Int(substr($atom_data, 8 + $colortableentry * 8 + 2, 2));
                 $atom_structure['color_table'][$colortableentry]['green'] = Helper::BigEndian2Int(substr($atom_data, 8 + $colortableentry * 8 + 4, 2));
                 $atom_structure['color_table'][$colortableentry]['blue'] = Helper::BigEndian2Int(substr($atom_data, 8 + $colortableentry * 8 + 6, 2));
             }
             break;
         case 'mvhd':
             // MoVie HeaDer atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             $atom_structure['creation_time'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['modify_time'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             $atom_structure['time_scale'] = Helper::BigEndian2Int(substr($atom_data, 12, 4));
             $atom_structure['duration'] = Helper::BigEndian2Int(substr($atom_data, 16, 4));
             $atom_structure['preferred_rate'] = Helper::FixedPoint16_16(substr($atom_data, 20, 4));
             $atom_structure['preferred_volume'] = Helper::FixedPoint8_8(substr($atom_data, 24, 2));
             $atom_structure['reserved'] = substr($atom_data, 26, 10);
             $atom_structure['matrix_a'] = Helper::FixedPoint16_16(substr($atom_data, 36, 4));
             $atom_structure['matrix_b'] = Helper::FixedPoint16_16(substr($atom_data, 40, 4));
             $atom_structure['matrix_u'] = Helper::FixedPoint2_30(substr($atom_data, 44, 4));
             $atom_structure['matrix_c'] = Helper::FixedPoint16_16(substr($atom_data, 48, 4));
             $atom_structure['matrix_d'] = Helper::FixedPoint16_16(substr($atom_data, 52, 4));
             $atom_structure['matrix_v'] = Helper::FixedPoint2_30(substr($atom_data, 56, 4));
             $atom_structure['matrix_x'] = Helper::FixedPoint16_16(substr($atom_data, 60, 4));
             $atom_structure['matrix_y'] = Helper::FixedPoint16_16(substr($atom_data, 64, 4));
             $atom_structure['matrix_w'] = Helper::FixedPoint2_30(substr($atom_data, 68, 4));
             $atom_structure['preview_time'] = Helper::BigEndian2Int(substr($atom_data, 72, 4));
             $atom_structure['preview_duration'] = Helper::BigEndian2Int(substr($atom_data, 76, 4));
             $atom_structure['poster_time'] = Helper::BigEndian2Int(substr($atom_data, 80, 4));
             $atom_structure['selection_time'] = Helper::BigEndian2Int(substr($atom_data, 84, 4));
             $atom_structure['selection_duration'] = Helper::BigEndian2Int(substr($atom_data, 88, 4));
             $atom_structure['current_time'] = Helper::BigEndian2Int(substr($atom_data, 92, 4));
             $atom_structure['next_track_id'] = Helper::BigEndian2Int(substr($atom_data, 96, 4));
             if ($atom_structure['time_scale'] == 0) {
                 $info['error'][] = 'Corrupt Quicktime file: mvhd.time_scale == zero';
                 return false;
             }
             $atom_structure['creation_time_unix'] = Helper::DateMac2Unix($atom_structure['creation_time']);
             $atom_structure['modify_time_unix'] = Helper::DateMac2Unix($atom_structure['modify_time']);
             $info['quicktime']['time_scale'] = isset($info['quicktime']['time_scale']) ? max($info['quicktime']['time_scale'], $atom_structure['time_scale']) : $atom_structure['time_scale'];
             $info['quicktime']['display_scale'] = $atom_structure['matrix_a'];
             $info['playtime_seconds'] = $atom_structure['duration'] / $atom_structure['time_scale'];
             break;
         case 'tkhd':
             // TracK HeaDer atom
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             $atom_structure['creation_time'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['modify_time'] = Helper::BigEndian2Int(substr($atom_data, 8, 4));
             $atom_structure['trackid'] = Helper::BigEndian2Int(substr($atom_data, 12, 4));
             $atom_structure['reserved1'] = Helper::BigEndian2Int(substr($atom_data, 16, 4));
             $atom_structure['duration'] = Helper::BigEndian2Int(substr($atom_data, 20, 4));
             $atom_structure['reserved2'] = Helper::BigEndian2Int(substr($atom_data, 24, 8));
             $atom_structure['layer'] = Helper::BigEndian2Int(substr($atom_data, 32, 2));
             $atom_structure['alternate_group'] = Helper::BigEndian2Int(substr($atom_data, 34, 2));
             $atom_structure['volume'] = Helper::FixedPoint8_8(substr($atom_data, 36, 2));
             $atom_structure['reserved3'] = Helper::BigEndian2Int(substr($atom_data, 38, 2));
             $atom_structure['matrix_a'] = Helper::FixedPoint16_16(substr($atom_data, 40, 4));
             $atom_structure['matrix_b'] = Helper::FixedPoint16_16(substr($atom_data, 44, 4));
             $atom_structure['matrix_u'] = Helper::FixedPoint16_16(substr($atom_data, 48, 4));
             $atom_structure['matrix_c'] = Helper::FixedPoint16_16(substr($atom_data, 52, 4));
             $atom_structure['matrix_d'] = Helper::FixedPoint16_16(substr($atom_data, 56, 4));
             $atom_structure['matrix_v'] = Helper::FixedPoint16_16(substr($atom_data, 60, 4));
             $atom_structure['matrix_x'] = Helper::FixedPoint2_30(substr($atom_data, 64, 4));
             $atom_structure['matrix_y'] = Helper::FixedPoint2_30(substr($atom_data, 68, 4));
             $atom_structure['matrix_w'] = Helper::FixedPoint2_30(substr($atom_data, 72, 4));
             $atom_structure['width'] = Helper::FixedPoint16_16(substr($atom_data, 76, 4));
             $atom_structure['height'] = Helper::FixedPoint16_16(substr($atom_data, 80, 4));
             $atom_structure['flags']['enabled'] = (bool) ($atom_structure['flags_raw'] & 0x1);
             $atom_structure['flags']['in_movie'] = (bool) ($atom_structure['flags_raw'] & 0x2);
             $atom_structure['flags']['in_preview'] = (bool) ($atom_structure['flags_raw'] & 0x4);
             $atom_structure['flags']['in_poster'] = (bool) ($atom_structure['flags_raw'] & 0x8);
             $atom_structure['creation_time_unix'] = Helper::DateMac2Unix($atom_structure['creation_time']);
             $atom_structure['modify_time_unix'] = Helper::DateMac2Unix($atom_structure['modify_time']);
             if ($atom_structure['flags']['enabled'] == 1) {
                 if (!isset($info['video']['resolution_x']) || !isset($info['video']['resolution_y'])) {
                     $info['video']['resolution_x'] = $atom_structure['width'];
                     $info['video']['resolution_y'] = $atom_structure['height'];
                 }
                 $info['video']['resolution_x'] = max($info['video']['resolution_x'], $atom_structure['width']);
                 $info['video']['resolution_y'] = max($info['video']['resolution_y'], $atom_structure['height']);
                 $info['quicktime']['video']['resolution_x'] = $info['video']['resolution_x'];
                 $info['quicktime']['video']['resolution_y'] = $info['video']['resolution_y'];
             } else {
                 if (isset($info['video']['resolution_x'])) {
                     unset($info['video']['resolution_x']);
                 }
                 if (isset($info['video']['resolution_y'])) {
                     unset($info['video']['resolution_y']);
                 }
                 if (isset($info['quicktime']['video'])) {
                     unset($info['quicktime']['video']);
                 }
             }
             break;
         case 'iods':
             // Initial Object DeScriptor atom
             // http://www.koders.com/c/fid1FAB3E762903DC482D8A246D4A4BF9F28E049594.aspx?s=windows.h
             // http://libquicktime.sourcearchive.com/documentation/1.0.2plus-pdebian/iods_8c-source.html
             $offset = 0;
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, $offset, 3));
             $offset += 3;
             $atom_structure['mp4_iod_tag'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['length'] = $this->quicktime_read_mp4_descr_length($atom_data, $offset);
             //$offset already adjusted by quicktime_read_mp4_descr_length()
             $atom_structure['object_descriptor_id'] = Helper::BigEndian2Int(substr($atom_data, $offset, 2));
             $offset += 2;
             $atom_structure['od_profile_level'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['scene_profile_level'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['audio_profile_id'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['video_profile_id'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['graphics_profile_level'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
             $offset += 1;
             $atom_structure['num_iods_tracks'] = ($atom_structure['length'] - 7) / 6;
             // 6 bytes would only be right if all tracks use 1-byte length fields
             for ($i = 0; $i < $atom_structure['num_iods_tracks']; ++$i) {
                 $atom_structure['track'][$i]['ES_ID_IncTag'] = Helper::BigEndian2Int(substr($atom_data, $offset, 1));
                 $offset += 1;
                 $atom_structure['track'][$i]['length'] = $this->quicktime_read_mp4_descr_length($atom_data, $offset);
                 //$offset already adjusted by quicktime_read_mp4_descr_length()
                 $atom_structure['track'][$i]['track_id'] = Helper::BigEndian2Int(substr($atom_data, $offset, 4));
                 $offset += 4;
             }
             $atom_structure['audio_profile_name'] = $this->QuicktimeIODSaudioProfileName($atom_structure['audio_profile_id']);
             $atom_structure['video_profile_name'] = $this->QuicktimeIODSvideoProfileName($atom_structure['video_profile_id']);
             break;
         case 'ftyp':
             // FileTYPe (?) atom (for MP4 it seems)
             $atom_structure['signature'] = substr($atom_data, 0, 4);
             $atom_structure['unknown_1'] = Helper::BigEndian2Int(substr($atom_data, 4, 4));
             $atom_structure['fourcc'] = substr($atom_data, 8, 4);
             break;
         case 'mdat':
             // Media DATa atom
         // Media DATa atom
         case 'free':
             // FREE space atom
         // FREE space atom
         case 'skip':
             // SKIP atom
         // 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
             $atom_structure['data'] = Helper::BigEndian2Int(substr($atom_data, 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
             $atom_structure['ctyp'] = substr($atom_data, 0, 4);
             $info['quicktime']['controller'] = $atom_structure['ctyp'];
             switch ($atom_structure['ctyp']) {
                 case 'qtvr':
                     $info['video']['dataformat'] = 'quicktimevr';
                     break;
             }
             break;
         case 'pano':
             // PANOrama track (seen on QTVR)
             $atom_structure['pano'] = Helper::BigEndian2Int(substr($atom_data, 0, 4));
             break;
         case 'hint':
             // HINT track
         // HINT track
         case 'hinf':
             //
         //
         case 'hinv':
             //
         //
         case 'hnti':
             //
             $info['quicktime']['hinting'] = true;
             break;
         case 'imgt':
             // IMaGe Track reference (kQTVRImageTrackRefType) (seen on QTVR)
             for ($i = 0; $i < $atom_structure['size'] - 8; $i += 4) {
                 $atom_structure['imgt'][] = Helper::BigEndian2Int(substr($atom_data, $i, 4));
             }
             break;
             // Observed-but-not-handled atom types are just listed here to prevent warnings being generated
         // Observed-but-not-handled atom types are just listed here to prevent warnings being generated
         case 'FXTC':
             // Something to do with Adobe After Effects (?)
         // 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
         // this is NOT "fiel" (Field Ordering) as describe here: http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html
         case 'tapt':
             // TrackApertureModeDimensionsAID - http://developer.apple.com/documentation/QuickTime/Reference/QT7-1_Update_Reference/Constants/Constants.html
             // tapt seems to be used to compute the video size [http://www.getid3.org/phpBB3/viewtopic.php?t=838]
             // * http://lists.apple.com/archives/quicktime-api/2006/Aug/msg00014.html
             // * http://handbrake.fr/irclogs/handbrake-dev/handbrake-dev20080128_pg2.html
         // TrackApertureModeDimensionsAID - http://developer.apple.com/documentation/QuickTime/Reference/QT7-1_Update_Reference/Constants/Constants.html
         // tapt seems to be used to compute the video size [http://www.getid3.org/phpBB3/viewtopic.php?t=838]
         // * http://lists.apple.com/archives/quicktime-api/2006/Aug/msg00014.html
         // * http://handbrake.fr/irclogs/handbrake-dev/handbrake-dev20080128_pg2.html
         case 'ctts':
             //  STCompositionOffsetAID             - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         //  STCompositionOffsetAID             - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         case 'cslg':
             //  STCompositionShiftLeastGreatestAID - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         //  STCompositionShiftLeastGreatestAID - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         case 'sdtp':
             //  STSampleDependencyAID              - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         //  STSampleDependencyAID              - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
         case 'stps':
             //  STPartialSyncSampleAID             - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
             //$atom_structure['data'] = $atom_data;
             break;
         case '©xyz':
             // GPS latitude+longitude+altitude
             $atom_structure['data'] = $atom_data;
             if (preg_match('#([\\+\\-][0-9\\.]+)([\\+\\-][0-9\\.]+)([\\+\\-][0-9\\.]+)?/$#i', $atom_data, $matches)) {
                 @(list($all, $latitude, $longitude, $altitude) = $matches);
                 $info['quicktime']['comments']['gps_latitude'][] = floatval($latitude);
                 $info['quicktime']['comments']['gps_longitude'][] = floatval($longitude);
                 if (!empty($altitude)) {
                     $info['quicktime']['comments']['gps_altitude'][] = floatval($altitude);
                 }
             } else {
                 $info['warning'][] = 'QuickTime atom "©xyz" data does not match expected data pattern at offset ' . $baseoffset . '. Please report as GetId3Core() bug.';
             }
             break;
         case 'NCDT':
             // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html
             // Nikon-specific QuickTime tags found in the NCDT atom of MOV videos from some Nikon cameras such as the Coolpix S8000 and D5100
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 4, $atomHierarchy, $ParseAllPossibleAtoms);
             break;
         case 'NCTH':
             // Nikon Camera THumbnail image
         // Nikon Camera THumbnail image
         case 'NCVW':
             // Nikon Camera preVieW image
             // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html
             if (preg_match('/^\\xFF\\xD8\\xFF/', $atom_data)) {
                 $atom_structure['data'] = $atom_data;
                 $atom_structure['image_mime'] = 'image/jpeg';
                 $atom_structure['description'] = $atomname == 'NCTH' ? 'Nikon Camera Thumbnail Image' : ($atomname == 'NCVW' ? 'Nikon Camera Preview Image' : 'Nikon preview image');
                 $info['quicktime']['comments']['picture'][] = array('image_mime' => $atom_structure['image_mime'], 'data' => $atom_data, 'description' => $atom_structure['description']);
             }
             break;
         case 'NCHD':
             // MakerNoteVersion
             // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html
             $atom_structure['data'] = $atom_data;
             break;
         case 'NCTG':
             // NikonTags
             // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#NCTG
             $atom_structure['data'] = $this->QuicktimeParseNikonNCTG($atom_data);
             break;
         case 'NCDB':
             // NikonTags
             // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html
             $atom_structure['data'] = $atom_data;
             break;
         case "":
         case 'meta':
             // METAdata atom
             // some kind of metacontainer, may contain a big data dump such as:
             // mdta keys  mdtacom.apple.quicktime.make (mdtacom.apple.quicktime.creationdate ,mdtacom.apple.quicktime.location.ISO6709 $mdtacom.apple.quicktime.software !mdtacom.apple.quicktime.model ilst   data DEApple 0  (data DE2011-05-11T17:54:04+0200 2  *data DE+52.4936+013.3897+040.247/   data DE4.3.1  data DEiPhone 4
             // http://www.geocities.com/xhelmboyx/quicktime/formats/qti-layout.txt
             $atom_structure['version'] = Helper::BigEndian2Int(substr($atom_data, 0, 1));
             $atom_structure['flags_raw'] = Helper::BigEndian2Int(substr($atom_data, 1, 3));
             $atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom(substr($atom_data, 4), $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             //$atom_structure['subatoms']  = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
             break;
         case 'data':
             // metaDATA atom
             // seems to be 2 bytes language code (ASCII), 2 bytes unknown (set to 0x10B5 in sample I have), remainder is useful data
             $atom_structure['language'] = substr($atom_data, 4 + 0, 2);
             $atom_structure['unknown'] = Helper::BigEndian2Int(substr($atom_data, 4 + 2, 2));
             $atom_structure['data'] = substr($atom_data, 4 + 4);
             break;
         default:
             $info['warning'][] = 'Unknown QuickTime atom type: "' . $atomname . '" (' . trim(Helper::PrintHexBytes($atomname)) . ') at offset ' . $baseoffset;
             $atom_structure['data'] = $atom_data;
             break;
     }
     array_pop($atomHierarchy);
     return $atom_structure;
 }
示例#2
0
 /**
  * @return bool
  */
 public function analyze()
 {
     $info =& $this->getid3->info;
     // shortcuts
     $info['bmp']['header']['raw'] = array();
     $thisfile_bmp =& $info['bmp'];
     $thisfile_bmp_header =& $thisfile_bmp['header'];
     $thisfile_bmp_header_raw =& $thisfile_bmp_header['raw'];
     // BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
     // all versions
     // WORD    bfType;
     // DWORD   bfSize;
     // WORD    bfReserved1;
     // WORD    bfReserved2;
     // DWORD   bfOffBits;
     fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
     $offset = 0;
     $BMPheader = fread($this->getid3->fp, 14 + 40);
     $thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2);
     $offset += 2;
     $magic = 'BM';
     if ($thisfile_bmp_header_raw['identifier'] != $magic) {
         $info['error'][] = 'Expecting "' . Helper::PrintHexBytes($magic) . '" at offset ' . $info['avdataoffset'] . ', found "' . Helper::PrintHexBytes($thisfile_bmp_header_raw['identifier']) . '"';
         unset($info['fileformat']);
         unset($info['bmp']);
         return false;
     }
     $thisfile_bmp_header_raw['filesize'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
     $offset += 4;
     $thisfile_bmp_header_raw['reserved1'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
     $offset += 2;
     $thisfile_bmp_header_raw['reserved2'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
     $offset += 2;
     $thisfile_bmp_header_raw['data_offset'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
     $offset += 4;
     $thisfile_bmp_header_raw['header_size'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
     $offset += 4;
     // check if the hardcoded-to-1 "planes" is at offset 22 or 26
     $planes22 = Helper::LittleEndian2Int(substr($BMPheader, 22, 2));
     $planes26 = Helper::LittleEndian2Int(substr($BMPheader, 26, 2));
     if ($planes22 == 1 && $planes26 != 1) {
         $thisfile_bmp['type_os'] = 'OS/2';
         $thisfile_bmp['type_version'] = 1;
     } elseif ($planes26 == 1 && $planes22 != 1) {
         $thisfile_bmp['type_os'] = 'Windows';
         $thisfile_bmp['type_version'] = 1;
     } elseif ($thisfile_bmp_header_raw['header_size'] == 12) {
         $thisfile_bmp['type_os'] = 'OS/2';
         $thisfile_bmp['type_version'] = 1;
     } elseif ($thisfile_bmp_header_raw['header_size'] == 40) {
         $thisfile_bmp['type_os'] = 'Windows';
         $thisfile_bmp['type_version'] = 1;
     } elseif ($thisfile_bmp_header_raw['header_size'] == 84) {
         $thisfile_bmp['type_os'] = 'Windows';
         $thisfile_bmp['type_version'] = 4;
     } elseif ($thisfile_bmp_header_raw['header_size'] == 100) {
         $thisfile_bmp['type_os'] = 'Windows';
         $thisfile_bmp['type_version'] = 5;
     } else {
         $info['error'][] = 'Unknown BMP subtype (or not a BMP file)';
         unset($info['fileformat']);
         unset($info['bmp']);
         return false;
     }
     $info['fileformat'] = 'bmp';
     $info['video']['dataformat'] = 'bmp';
     $info['video']['lossless'] = true;
     $info['video']['pixel_aspect_ratio'] = (double) 1;
     if ($thisfile_bmp['type_os'] == 'OS/2') {
         // OS/2-format BMP
         // http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
         // DWORD  Size;             /* Size of this structure in bytes */
         // DWORD  Width;            /* Bitmap width in pixels */
         // DWORD  Height;           /* Bitmap height in pixel */
         // WORD   NumPlanes;        /* Number of bit planes (color depth) */
         // WORD   BitsPerPixel;     /* Number of bits per pixel per plane */
         $thisfile_bmp_header_raw['width'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $thisfile_bmp_header_raw['height'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $thisfile_bmp_header_raw['planes'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $thisfile_bmp_header_raw['bits_per_pixel'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $info['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
         $info['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
         $info['video']['codec'] = 'BI_RGB ' . $thisfile_bmp_header_raw['bits_per_pixel'] . '-bit';
         $info['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
         if ($thisfile_bmp['type_version'] >= 2) {
             // DWORD  Compression;      /* Bitmap compression scheme */
             // DWORD  ImageDataSize;    /* Size of bitmap data in bytes */
             // DWORD  XResolution;      /* X resolution of display device */
             // DWORD  YResolution;      /* Y resolution of display device */
             // DWORD  ColorsUsed;       /* Number of color table indices used */
             // DWORD  ColorsImportant;  /* Number of important color indices */
             // WORD   Units;            /* Type of units used to measure resolution */
             // WORD   Reserved;         /* Pad structure to 4-byte boundary */
             // WORD   Recording;        /* Recording algorithm */
             // WORD   Rendering;        /* Halftoning algorithm used */
             // DWORD  Size1;            /* Reserved for halftoning algorithm use */
             // DWORD  Size2;            /* Reserved for halftoning algorithm use */
             // DWORD  ColorEncoding;    /* Color model used in bitmap */
             // DWORD  Identifier;       /* Reserved for application use */
             $thisfile_bmp_header_raw['compression'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['bmp_data_size'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['resolution_h'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['resolution_v'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['colors_used'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['colors_important'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['resolution_units'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
             $offset += 2;
             $thisfile_bmp_header_raw['reserved1'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
             $offset += 2;
             $thisfile_bmp_header_raw['recording'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
             $offset += 2;
             $thisfile_bmp_header_raw['rendering'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
             $offset += 2;
             $thisfile_bmp_header_raw['size1'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['size2'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['color_encoding'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['identifier'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']);
             $info['video']['codec'] = $thisfile_bmp_header['compression'] . ' ' . $thisfile_bmp_header_raw['bits_per_pixel'] . '-bit';
         }
     } elseif ($thisfile_bmp['type_os'] == 'Windows') {
         // Windows-format BMP
         // BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
         // all versions
         // DWORD  biSize;
         // LONG   biWidth;
         // LONG   biHeight;
         // WORD   biPlanes;
         // WORD   biBitCount;
         // DWORD  biCompression;
         // DWORD  biSizeImage;
         // LONG   biXPelsPerMeter;
         // LONG   biYPelsPerMeter;
         // DWORD  biClrUsed;
         // DWORD  biClrImportant;
         // possibly integrate this section and module.audio-video.riff.php::ParseBITMAPINFOHEADER() ?
         $thisfile_bmp_header_raw['width'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
         $offset += 4;
         $thisfile_bmp_header_raw['height'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
         $offset += 4;
         $thisfile_bmp_header_raw['planes'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $thisfile_bmp_header_raw['bits_per_pixel'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 2));
         $offset += 2;
         $thisfile_bmp_header_raw['compression'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
         $offset += 4;
         $thisfile_bmp_header_raw['bmp_data_size'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
         $offset += 4;
         $thisfile_bmp_header_raw['resolution_h'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
         $offset += 4;
         $thisfile_bmp_header_raw['resolution_v'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
         $offset += 4;
         $thisfile_bmp_header_raw['colors_used'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
         $offset += 4;
         $thisfile_bmp_header_raw['colors_important'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
         $offset += 4;
         $thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']);
         $info['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
         $info['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
         $info['video']['codec'] = $thisfile_bmp_header['compression'] . ' ' . $thisfile_bmp_header_raw['bits_per_pixel'] . '-bit';
         $info['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
         if ($thisfile_bmp['type_version'] >= 4 || $thisfile_bmp_header_raw['compression'] == 3) {
             // should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
             $BMPheader .= fread($this->getid3->fp, 44);
             // BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
             // Win95+, WinNT4.0+
             // DWORD        bV4RedMask;
             // DWORD        bV4GreenMask;
             // DWORD        bV4BlueMask;
             // DWORD        bV4AlphaMask;
             // DWORD        bV4CSType;
             // CIEXYZTRIPLE bV4Endpoints;
             // DWORD        bV4GammaRed;
             // DWORD        bV4GammaGreen;
             // DWORD        bV4GammaBlue;
             $thisfile_bmp_header_raw['red_mask'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['green_mask'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['blue_mask'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['alpha_mask'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['cs_type'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['ciexyz_red'] = substr($BMPheader, $offset, 4);
             $offset += 4;
             $thisfile_bmp_header_raw['ciexyz_green'] = substr($BMPheader, $offset, 4);
             $offset += 4;
             $thisfile_bmp_header_raw['ciexyz_blue'] = substr($BMPheader, $offset, 4);
             $offset += 4;
             $thisfile_bmp_header_raw['gamma_red'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['gamma_green'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['gamma_blue'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header['ciexyz_red'] = Helper::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
             $thisfile_bmp_header['ciexyz_green'] = Helper::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
             $thisfile_bmp_header['ciexyz_blue'] = Helper::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue']));
         }
         if ($thisfile_bmp['type_version'] >= 5) {
             $BMPheader .= fread($this->getid3->fp, 16);
             // BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
             // Win98+, Win2000+
             // DWORD        bV5Intent;
             // DWORD        bV5ProfileData;
             // DWORD        bV5ProfileSize;
             // DWORD        bV5Reserved;
             $thisfile_bmp_header_raw['intent'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['profile_data_offset'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['profile_data_size'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
             $thisfile_bmp_header_raw['reserved3'] = Helper::LittleEndian2Int(substr($BMPheader, $offset, 4));
             $offset += 4;
         }
     } else {
         $info['error'][] = 'Unknown BMP format in header.';
         return false;
     }
     if ($this->ExtractPalette || $this->ExtractData) {
         $PaletteEntries = 0;
         if ($thisfile_bmp_header_raw['bits_per_pixel'] < 16) {
             $PaletteEntries = pow(2, $thisfile_bmp_header_raw['bits_per_pixel']);
         } elseif (isset($thisfile_bmp_header_raw['colors_used']) && $thisfile_bmp_header_raw['colors_used'] > 0 && $thisfile_bmp_header_raw['colors_used'] <= 256) {
             $PaletteEntries = $thisfile_bmp_header_raw['colors_used'];
         }
         if ($PaletteEntries > 0) {
             $BMPpalette = fread($this->getid3->fp, 4 * $PaletteEntries);
             $paletteoffset = 0;
             for ($i = 0; $i < $PaletteEntries; ++$i) {
                 // RGBQUAD          - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
                 // BYTE    rgbBlue;
                 // BYTE    rgbGreen;
                 // BYTE    rgbRed;
                 // BYTE    rgbReserved;
                 $blue = Helper::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
                 $green = Helper::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
                 $red = Helper::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
                 if ($thisfile_bmp['type_os'] == 'OS/2' && $thisfile_bmp['type_version'] == 1) {
                     // no padding byte
                 } else {
                     ++$paletteoffset;
                     // padding byte
                 }
                 $thisfile_bmp['palette'][$i] = $red << 16 | $green << 8 | $blue;
             }
         }
     }
     if ($this->ExtractData) {
         fseek($this->getid3->fp, $thisfile_bmp_header_raw['data_offset'], SEEK_SET);
         $RowByteLength = ceil($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8) / 4) * 4;
         // round up to nearest DWORD boundry
         $BMPpixelData = fread($this->getid3->fp, $thisfile_bmp_header_raw['height'] * $RowByteLength);
         $pixeldataoffset = 0;
         $thisfile_bmp_header_raw['compression'] = isset($thisfile_bmp_header_raw['compression']) ? $thisfile_bmp_header_raw['compression'] : '';
         switch ($thisfile_bmp_header_raw['compression']) {
             case 0:
                 // BI_RGB
                 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
                     case 1:
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
                                 $paletteindexbyte = ord($BMPpixelData[$pixeldataoffset++]);
                                 for ($i = 7; $i >= 0; --$i) {
                                     $paletteindex = ($paletteindexbyte & 0x1 << $i) >> $i;
                                     $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
                                     ++$col;
                                 }
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     case 4:
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
                                 $paletteindexbyte = ord($BMPpixelData[$pixeldataoffset++]);
                                 for ($i = 1; $i >= 0; --$i) {
                                     $paletteindex = ($paletteindexbyte & 0xf << 4 * $i) >> 4 * $i;
                                     $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
                                     ++$col;
                                 }
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     case 8:
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; ++$col) {
                                 $paletteindex = ord($BMPpixelData[$pixeldataoffset++]);
                                 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     case 24:
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; ++$col) {
                                 $thisfile_bmp['data'][$row][$col] = ord($BMPpixelData[$pixeldataoffset + 2]) << 16 | ord($BMPpixelData[$pixeldataoffset + 1]) << 8 | ord($BMPpixelData[$pixeldataoffset]);
                                 $pixeldataoffset += 3;
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     case 32:
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; ++$col) {
                                 $thisfile_bmp['data'][$row][$col] = ord($BMPpixelData[$pixeldataoffset + 3]) << 24 | ord($BMPpixelData[$pixeldataoffset + 2]) << 16 | ord($BMPpixelData[$pixeldataoffset + 1]) << 8 | ord($BMPpixelData[$pixeldataoffset]);
                                 $pixeldataoffset += 4;
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     case 16:
                         // ?
                         break;
                     default:
                         $info['error'][] = 'Unknown bits-per-pixel value (' . $thisfile_bmp_header_raw['bits_per_pixel'] . ') - cannot read pixel data';
                         break;
                 }
                 break;
             case 1:
                 // BI_RLE8 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
                 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
                     case 8:
                         $pixelcounter = 0;
                         while ($pixeldataoffset < strlen($BMPpixelData)) {
                             $firstbyte = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                             $secondbyte = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                             if ($firstbyte == 0) {
                                 // escaped/absolute mode - the first byte of the pair can be set to zero to
                                 // indicate an escape character that denotes the end of a line, the end of
                                 // a bitmap, or a delta, depending on the value of the second byte.
                                 switch ($secondbyte) {
                                     case 0:
                                         // end of line
                                         // no need for special processing, just ignore
                                         break;
                                     case 1:
                                         // end of bitmap
                                         $pixeldataoffset = strlen($BMPpixelData);
                                         // force to exit loop just in case
                                         break;
                                     case 2:
                                         // delta - The 2 bytes following the escape contain unsigned values
                                         // indicating the horizontal and vertical offsets of the next pixel
                                         // from the current position.
                                         $colincrement = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                         $rowincrement = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                         $col = $pixelcounter % $thisfile_bmp_header_raw['width'] + $colincrement;
                                         $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'] - $rowincrement;
                                         $pixelcounter = $row * $thisfile_bmp_header_raw['width'] + $col;
                                         break;
                                     default:
                                         // In absolute mode, the first byte is zero and the second byte is a
                                         // value in the range 03H through FFH. The second byte represents the
                                         // number of bytes that follow, each of which contains the color index
                                         // of a single pixel. Each run must be aligned on a word boundary.
                                         for ($i = 0; $i < $secondbyte; ++$i) {
                                             $paletteindex = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                             $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
                                             $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'];
                                             $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
                                             ++$pixelcounter;
                                         }
                                         while ($pixeldataoffset % 2 != 0) {
                                             // Each run must be aligned on a word boundary.
                                             ++$pixeldataoffset;
                                         }
                                         break;
                                 }
                             } else {
                                 // encoded mode - the first byte specifies the number of consecutive pixels
                                 // to be drawn using the color index contained in the second byte.
                                 for ($i = 0; $i < $firstbyte; ++$i) {
                                     $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
                                     $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'];
                                     $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$secondbyte];
                                     ++$pixelcounter;
                                 }
                             }
                         }
                         break;
                     default:
                         $info['error'][] = 'Unknown bits-per-pixel value (' . $thisfile_bmp_header_raw['bits_per_pixel'] . ') - cannot read pixel data';
                         break;
                 }
                 break;
             case 2:
                 // BI_RLE4 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
                 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
                     case 4:
                         $pixelcounter = 0;
                         while ($pixeldataoffset < strlen($BMPpixelData)) {
                             $firstbyte = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                             $secondbyte = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                             if ($firstbyte == 0) {
                                 // escaped/absolute mode - the first byte of the pair can be set to zero to
                                 // indicate an escape character that denotes the end of a line, the end of
                                 // a bitmap, or a delta, depending on the value of the second byte.
                                 switch ($secondbyte) {
                                     case 0:
                                         // end of line
                                         // no need for special processing, just ignore
                                         break;
                                     case 1:
                                         // end of bitmap
                                         $pixeldataoffset = strlen($BMPpixelData);
                                         // force to exit loop just in case
                                         break;
                                     case 2:
                                         // delta - The 2 bytes following the escape contain unsigned values
                                         // indicating the horizontal and vertical offsets of the next pixel
                                         // from the current position.
                                         $colincrement = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                         $rowincrement = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                         $col = $pixelcounter % $thisfile_bmp_header_raw['width'] + $colincrement;
                                         $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'] - $rowincrement;
                                         $pixelcounter = $row * $thisfile_bmp_header_raw['width'] + $col;
                                         break;
                                     default:
                                         // In absolute mode, the first byte is zero. The second byte contains the number
                                         // of color indexes that follow. Subsequent bytes contain color indexes in their
                                         // high- and low-order 4 bits, one color index for each pixel. In absolute mode,
                                         // each run must be aligned on a word boundary.
                                         unset($paletteindexes);
                                         for ($i = 0; $i < ceil($secondbyte / 2); ++$i) {
                                             $paletteindexbyte = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
                                             $paletteindexes[] = ($paletteindexbyte & 0xf0) >> 4;
                                             $paletteindexes[] = $paletteindexbyte & 0xf;
                                         }
                                         while ($pixeldataoffset % 2 != 0) {
                                             // Each run must be aligned on a word boundary.
                                             ++$pixeldataoffset;
                                         }
                                         foreach ($paletteindexes as $paletteindex) {
                                             $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
                                             $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'];
                                             $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
                                             ++$pixelcounter;
                                         }
                                         break;
                                 }
                             } else {
                                 // encoded mode - the first byte of the pair contains the number of pixels to be
                                 // drawn using the color indexes in the second byte. The second byte contains two
                                 // color indexes, one in its high-order 4 bits and one in its low-order 4 bits.
                                 // The first of the pixels is drawn using the color specified by the high-order
                                 // 4 bits, the second is drawn using the color in the low-order 4 bits, the third
                                 // is drawn using the color in the high-order 4 bits, and so on, until all the
                                 // pixels specified by the first byte have been drawn.
                                 $paletteindexes[0] = ($secondbyte & 0xf0) >> 4;
                                 $paletteindexes[1] = $secondbyte & 0xf;
                                 for ($i = 0; $i < $firstbyte; ++$i) {
                                     $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
                                     $row = $thisfile_bmp_header_raw['height'] - 1 - ($pixelcounter - $col) / $thisfile_bmp_header_raw['width'];
                                     $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindexes[$i % 2]];
                                     ++$pixelcounter;
                                 }
                             }
                         }
                         break;
                     default:
                         $info['error'][] = 'Unknown bits-per-pixel value (' . $thisfile_bmp_header_raw['bits_per_pixel'] . ') - cannot read pixel data';
                         break;
                 }
                 break;
             case 3:
                 // BI_BITFIELDS
                 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
                     case 16:
                     case 32:
                         $redshift = 0;
                         $greenshift = 0;
                         $blueshift = 0;
                         while (($thisfile_bmp_header_raw['red_mask'] >> $redshift & 0x1) == 0) {
                             ++$redshift;
                         }
                         while (($thisfile_bmp_header_raw['green_mask'] >> $greenshift & 0x1) == 0) {
                             ++$greenshift;
                         }
                         while (($thisfile_bmp_header_raw['blue_mask'] >> $blueshift & 0x1) == 0) {
                             ++$blueshift;
                         }
                         for ($row = $thisfile_bmp_header_raw['height'] - 1; $row >= 0; --$row) {
                             for ($col = 0; $col < $thisfile_bmp_header_raw['width']; ++$col) {
                                 $pixelvalue = Helper::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $thisfile_bmp_header_raw['bits_per_pixel'] / 8));
                                 $pixeldataoffset += $thisfile_bmp_header_raw['bits_per_pixel'] / 8;
                                 $red = intval(round((($pixelvalue & $thisfile_bmp_header_raw['red_mask']) >> $redshift) / ($thisfile_bmp_header_raw['red_mask'] >> $redshift) * 255));
                                 $green = intval(round((($pixelvalue & $thisfile_bmp_header_raw['green_mask']) >> $greenshift) / ($thisfile_bmp_header_raw['green_mask'] >> $greenshift) * 255));
                                 $blue = intval(round((($pixelvalue & $thisfile_bmp_header_raw['blue_mask']) >> $blueshift) / ($thisfile_bmp_header_raw['blue_mask'] >> $blueshift) * 255));
                                 $thisfile_bmp['data'][$row][$col] = $red << 16 | $green << 8 | $blue;
                             }
                             while ($pixeldataoffset % 4 != 0) {
                                 // lines are padded to nearest DWORD
                                 ++$pixeldataoffset;
                             }
                         }
                         break;
                     default:
                         $info['error'][] = 'Unknown bits-per-pixel value (' . $thisfile_bmp_header_raw['bits_per_pixel'] . ') - cannot read pixel data';
                         break;
                 }
                 break;
             default:
                 // unhandled compression type
                 $info['error'][] = 'Unknown/unhandled compression type value (' . $thisfile_bmp_header_raw['compression'] . ') - cannot decompress pixel data';
                 break;
         }
     }
     return true;
 }