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