www/plugins-dist/medias/lib/getid3/module.graphic.tiff.php

   1 <?php
   2 /////////////////////////////////////////////////////////////////
   3 /// getID3() by James Heinrich <info@getid3.org>               //
   4 //  available at http://getid3.sourceforge.net                 //
   5 //            or http://www.getid3.org                         //
   6 //          also https://github.com/JamesHeinrich/getID3       //
   7 /////////////////////////////////////////////////////////////////
   8 // See readme.txt for more details                             //
   9 /////////////////////////////////////////////////////////////////
  10 //                                                             //
  11 // module.archive.tiff.php                                     //
  12 // module for analyzing TIFF files                             //
  13 // dependencies: NONE                                          //
  14 //                                                            ///
  15 /////////////////////////////////////////////////////////////////
  16
  17
  18 class getid3_tiff extends getid3_handler
  19 {
  20
  21         public function Analyze() {
  22                 $info = &$this->getid3->info;
  23
  24                 $this->fseek($info['avdataoffset']);
  25                 $TIFFheader = $this->fread(4);
  26
  27                 switch (substr($TIFFheader, 0, 2)) {
  28                         case 'II':
  29                                 $info['tiff']['byte_order'] = 'Intel';
  30                                 break;
  31                         case 'MM':
  32                                 $info['tiff']['byte_order'] = 'Motorola';
  33                                 break;
  34                         default:
  35                                 $this->error('Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$info['avdataoffset']);
  36                                 return false;
  37                                 break;
  38                 }
  39
  40                 $info['fileformat']          = 'tiff';
  41                 $info['video']['dataformat'] = 'tiff';
  42                 $info['video']['lossless']   = true;
  43                 $info['tiff']['ifd']         = array();
  44                 $CurrentIFD                          = array();
  45
  46                 $FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
  47
  48                 $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
  49
  50                 while ($nextIFDoffset > 0) {
  51
  52                         $CurrentIFD['offset'] = $nextIFDoffset;
  53
  54                         $this->fseek($info['avdataoffset'] + $nextIFDoffset);
  55                         $CurrentIFD['fieldcount'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
  56
  57                         for ($i = 0; $i < $CurrentIFD['fieldcount']; $i++) {
  58                                 $CurrentIFD['fields'][$i]['raw']['tag']    = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
  59                                 $CurrentIFD['fields'][$i]['raw']['type']   = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
  60                                 $CurrentIFD['fields'][$i]['raw']['length'] = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
  61                                 $CurrentIFD['fields'][$i]['raw']['offset'] =                       $this->fread(4);
  62
  63                                 switch ($CurrentIFD['fields'][$i]['raw']['type']) {
  64                                         case 1: // BYTE  An 8-bit unsigned integer.
  65                                                 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
  66                                                         $CurrentIFD['fields'][$i]['value']  = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 1), $info['tiff']['byte_order']);
  67                                                 } else {
  68                                                         $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
  69                                                 }
  70                                                 break;
  71
  72                                         case 2: // ASCII 8-bit bytes  that store ASCII codes; the last byte must be null.
  73                                                 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
  74                                                         $CurrentIFD['fields'][$i]['value']  = substr($CurrentIFD['fields'][$i]['raw']['offset'], 3);
  75                                                 } else {
  76                                                         $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
  77                                                 }
  78                                                 break;
  79
  80                                         case 3: // SHORT A 16-bit (2-byte) unsigned integer.
  81                                                 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 2) {
  82                                                         $CurrentIFD['fields'][$i]['value']  = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 2), $info['tiff']['byte_order']);
  83                                                 } else {
  84                                                         $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
  85                                                 }
  86                                                 break;
  87
  88                                         case 4: // LONG  A 32-bit (4-byte) unsigned integer.
  89                                                 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 1) {
  90                                                         $CurrentIFD['fields'][$i]['value']  = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
  91                                                 } else {
  92                                                         $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
  93                                                 }
  94                                                 break;
  95
  96                                         case 5: // RATIONAL   Two LONG_s:  the first represents the numerator of a fraction, the second the denominator.
  97                                                 break;
  98                                 }
  99                         }
 100
 101                         $info['tiff']['ifd'][] = $CurrentIFD;
 102                         $CurrentIFD = array();
 103                         $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
 104
 105                 }
 106
 107                 foreach ($info['tiff']['ifd'] as $IFDid => $IFDarray) {
 108                         foreach ($IFDarray['fields'] as $key => $fieldarray) {
 109                                 switch ($fieldarray['raw']['tag']) {
 110                                         case 256: // ImageWidth
 111                                         case 257: // ImageLength
 112                                         case 258: // BitsPerSample
 113                                         case 259: // Compression
 114                                                 if (!isset($fieldarray['value'])) {
 115                                                         $this->fseek($fieldarray['offset']);
 116                                                         $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
 117
 118                                                 }
 119                                                 break;
 120
 121                                         case 270: // ImageDescription
 122                                         case 271: // Make
 123                                         case 272: // Model
 124                                         case 305: // Software
 125                                         case 306: // DateTime
 126                                         case 315: // Artist
 127                                         case 316: // HostComputer
 128                                                 if (isset($fieldarray['value'])) {
 129                                                         $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $fieldarray['value'];
 130                                                 } else {
 131                                                         $this->fseek($fieldarray['offset']);
 132                                                         $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
 133
 134                                                 }
 135                                                 break;
 136                                 }
 137                                 switch ($fieldarray['raw']['tag']) {
 138                                         case 256: // ImageWidth
 139                                                 $info['video']['resolution_x'] = $fieldarray['value'];
 140                                                 break;
 141
 142                                         case 257: // ImageLength
 143                                                 $info['video']['resolution_y'] = $fieldarray['value'];
 144                                                 break;
 145
 146                                         case 258: // BitsPerSample
 147                                                 if (isset($fieldarray['value'])) {
 148                                                         $info['video']['bits_per_sample'] = $fieldarray['value'];
 149                                                 } else {
 150                                                         $info['video']['bits_per_sample'] = 0;
 151                                                         for ($i = 0; $i < $fieldarray['raw']['length']; $i++) {
 152                                                                 $info['video']['bits_per_sample'] += $this->TIFFendian2Int(substr($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'], $i * $FieldTypeByteLength[$fieldarray['raw']['type']], $FieldTypeByteLength[$fieldarray['raw']['type']]), $info['tiff']['byte_order']);
 153                                                         }
 154                                                 }
 155                                                 break;
 156
 157                                         case 259: // Compression
 158                                                 $info['video']['codec'] = $this->TIFFcompressionMethod($fieldarray['value']);
 159                                                 break;
 160
 161                                         case 270: // ImageDescription
 162                                         case 271: // Make
 163                                         case 272: // Model
 164                                         case 305: // Software
 165                                         case 306: // DateTime
 166                                         case 315: // Artist
 167                                         case 316: // HostComputer
 168                                                 $TIFFcommentName = $this->TIFFcommentName($fieldarray['raw']['tag']);
 169                                                 if (isset($info['tiff']['comments'][$TIFFcommentName])) {
 170                                                         $info['tiff']['comments'][$TIFFcommentName][] =       $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'];
 171                                                 } else {
 172                                                         $info['tiff']['comments'][$TIFFcommentName]   = array($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data']);
 173                                                 }
 174                                                 break;
 175
 176                                         default:
 177                                                 break;
 178                                 }
 179                         }
 180                 }
 181
 182                 return true;
 183         }
 184
 185
 186         public function TIFFendian2Int($bytestring, $byteorder) {
 187                 if ($byteorder == 'Intel') {
 188                         return getid3_lib::LittleEndian2Int($bytestring);
 189                 } elseif ($byteorder == 'Motorola') {
 190                         return getid3_lib::BigEndian2Int($bytestring);
 191                 }
 192                 return false;
 193         }
 194
 195         public function TIFFcompressionMethod($id) {
 196                 static $TIFFcompressionMethod = array();
 197                 if (empty($TIFFcompressionMethod)) {
 198                         $TIFFcompressionMethod = array(
 199                                 1     => 'Uncompressed',
 200                                 2     => 'Huffman',
 201                                 3     => 'Fax - CCITT 3',
 202                                 5     => 'LZW',
 203                                 32773 => 'PackBits',
 204                         );
 205                 }
 206                 return (isset($TIFFcompressionMethod[$id]) ? $TIFFcompressionMethod[$id] : 'unknown/invalid ('.$id.')');
 207         }
 208
 209         public function TIFFcommentName($id) {
 210                 static $TIFFcommentName = array();
 211                 if (empty($TIFFcommentName)) {
 212                         $TIFFcommentName = array(
 213                                 270 => 'imagedescription',
 214                                 271 => 'make',
 215                                 272 => 'model',
 216                                 305 => 'software',
 217                                 306 => 'datetime',
 218                                 315 => 'artist',
 219                                 316 => 'hostcomputer',
 220                         );
 221                 }
 222                 return (isset($TIFFcommentName[$id]) ? $TIFFcommentName[$id] : 'unknown/invalid ('.$id.')');
 223         }
 224
 225 }