| 1 | <?php |
|---|
| 2 | // +----------------------------------------------------------------------+ |
|---|
| 3 | // | PHP version 5 | |
|---|
| 4 | // +----------------------------------------------------------------------+ |
|---|
| 5 | // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
|---|
| 6 | // +----------------------------------------------------------------------+ |
|---|
| 7 | // | This source file is subject to version 2 of the GPL license, | |
|---|
| 8 | // | that is bundled with this package in the file license.txt and is | |
|---|
| 9 | // | available through the world-wide-web at the following url: | |
|---|
| 10 | // | http://www.gnu.org/copyleft/gpl.html | |
|---|
| 11 | // +----------------------------------------------------------------------+ |
|---|
| 12 | // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
|---|
| 13 | // +----------------------------------------------------------------------+ |
|---|
| 14 | // | Authors: James Heinrich <infoØgetid3*org> | |
|---|
| 15 | // | Allan Hansen <ahØartemis*dk> | |
|---|
| 16 | // +----------------------------------------------------------------------+ |
|---|
| 17 | // | module.graphic.tiff.php | |
|---|
| 18 | // | Module for analyzing TIFF graphic files. | |
|---|
| 19 | // | dependencies: NONE | |
|---|
| 20 | // +----------------------------------------------------------------------+ |
|---|
| 21 | // |
|---|
| 22 | // $Id: module.graphic.tiff.php 3318 2009-05-20 21:54:10Z vdigital $ |
|---|
| 23 | |
|---|
| 24 | |
|---|
| 25 | |
|---|
| 26 | class getid3_tiff extends getid3_handler |
|---|
| 27 | { |
|---|
| 28 | |
|---|
| 29 | public function Analyze() { |
|---|
| 30 | |
|---|
| 31 | $getid3 = $this->getid3; |
|---|
| 32 | |
|---|
| 33 | fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
|---|
| 34 | $tiff_header = fread($getid3->fp, 4); |
|---|
| 35 | |
|---|
| 36 | $getid3->info['tiff']['byte_order'] = substr($tiff_header, 0, 2) == 'II' ? 'Intel' : 'Motorola'; |
|---|
| 37 | $endian2int = substr($tiff_header, 0, 2) == 'II' ? 'LittleEndian2Int' : 'BigEndian2Int'; |
|---|
| 38 | |
|---|
| 39 | $getid3->info['fileformat'] = 'tiff'; |
|---|
| 40 | $getid3->info['video']['dataformat'] = 'tiff'; |
|---|
| 41 | $getid3->info['video']['lossless'] = true; |
|---|
| 42 | $getid3->info['tiff']['ifd'] = array (); |
|---|
| 43 | $current_ifd = array (); |
|---|
| 44 | |
|---|
| 45 | $field_type_byte_length = array (1=>1, 2=>1, 3=>2, 4=>4, 5=>8); |
|---|
| 46 | |
|---|
| 47 | $next_ifd_offset = getid3_lib::$endian2int(fread($getid3->fp, 4)); |
|---|
| 48 | |
|---|
| 49 | while ($next_ifd_offset > 0) { |
|---|
| 50 | |
|---|
| 51 | $current_ifd['offset'] = $next_ifd_offset; |
|---|
| 52 | |
|---|
| 53 | fseek($getid3->fp, $getid3->info['avdataoffset'] + $next_ifd_offset, SEEK_SET); |
|---|
| 54 | $current_ifd['fieldcount'] = getid3_lib::$endian2int(fread($getid3->fp, 2)); |
|---|
| 55 | |
|---|
| 56 | for ($i = 0; $i < $current_ifd['fieldcount']; $i++) { |
|---|
| 57 | |
|---|
| 58 | // shortcut |
|---|
| 59 | $current_ifd['fields'][$i] = array (); |
|---|
| 60 | $current_ifd_fields_i = &$current_ifd['fields'][$i]; |
|---|
| 61 | |
|---|
| 62 | $current_ifd_fields_i['raw']['tag'] = getid3_lib::$endian2int(fread($getid3->fp, 2)); |
|---|
| 63 | $current_ifd_fields_i['raw']['type'] = getid3_lib::$endian2int(fread($getid3->fp, 2)); |
|---|
| 64 | $current_ifd_fields_i['raw']['length'] = getid3_lib::$endian2int(fread($getid3->fp, 4)); |
|---|
| 65 | $current_ifd_fields_i['raw']['offset'] = fread($getid3->fp, 4); |
|---|
| 66 | |
|---|
| 67 | switch ($current_ifd_fields_i['raw']['type']) { |
|---|
| 68 | case 1: // BYTE An 8-bit unsigned integer. |
|---|
| 69 | if ($current_ifd_fields_i['raw']['length'] <= 4) { |
|---|
| 70 | $current_ifd_fields_i['value'] = getid3_lib::$endian2int(substr($current_ifd_fields_i['raw']['offset'], 0, 1)); |
|---|
| 71 | } else { |
|---|
| 72 | $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']); |
|---|
| 73 | } |
|---|
| 74 | break; |
|---|
| 75 | |
|---|
| 76 | case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null. |
|---|
| 77 | if ($current_ifd_fields_i['raw']['length'] <= 4) { |
|---|
| 78 | $current_ifd_fields_i['value'] = substr($current_ifd_fields_i['raw']['offset'], 3); |
|---|
| 79 | } else { |
|---|
| 80 | $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']); |
|---|
| 81 | } |
|---|
| 82 | break; |
|---|
| 83 | |
|---|
| 84 | case 3: // SHORT A 16-bit (2-byte) unsigned integer. |
|---|
| 85 | if ($current_ifd_fields_i['raw']['length'] <= 2) { |
|---|
| 86 | $current_ifd_fields_i['value'] = getid3_lib::$endian2int(substr($current_ifd_fields_i['raw']['offset'], 0, 2)); |
|---|
| 87 | } else { |
|---|
| 88 | $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']); |
|---|
| 89 | } |
|---|
| 90 | break; |
|---|
| 91 | |
|---|
| 92 | case 4: // LONG A 32-bit (4-byte) unsigned integer. |
|---|
| 93 | if ($current_ifd_fields_i['raw']['length'] <= 1) { |
|---|
| 94 | $current_ifd_fields_i['value'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']); |
|---|
| 95 | } else { |
|---|
| 96 | $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']); |
|---|
| 97 | } |
|---|
| 98 | break; |
|---|
| 99 | |
|---|
| 100 | case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator. |
|---|
| 101 | break; |
|---|
| 102 | } |
|---|
| 103 | } |
|---|
| 104 | |
|---|
| 105 | $getid3->info['tiff']['ifd'][] = $current_ifd; |
|---|
| 106 | $current_ifd = array (); |
|---|
| 107 | $next_ifd_offset = getid3_lib::$endian2int(fread($getid3->fp, 4)); |
|---|
| 108 | |
|---|
| 109 | } |
|---|
| 110 | |
|---|
| 111 | foreach ($getid3->info['tiff']['ifd'] as $ifd_id => $ifd_array) { |
|---|
| 112 | foreach ($ifd_array['fields'] as $key => $field_array) { |
|---|
| 113 | switch ($field_array['raw']['tag']) { |
|---|
| 114 | case 256: // ImageWidth |
|---|
| 115 | case 257: // ImageLength |
|---|
| 116 | case 258: // BitsPerSample |
|---|
| 117 | case 259: // Compression |
|---|
| 118 | if (!isset($field_array['value'])) { |
|---|
| 119 | fseek($getid3->fp, $field_array['offset'], SEEK_SET); |
|---|
| 120 | $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = fread($getid3->fp, $field_array['raw']['length'] * $field_type_byte_length[$field_array['raw']['type']]); |
|---|
| 121 | } |
|---|
| 122 | break; |
|---|
| 123 | |
|---|
| 124 | case 270: // ImageDescription |
|---|
| 125 | case 271: // Make |
|---|
| 126 | case 272: // Model |
|---|
| 127 | case 305: // Software |
|---|
| 128 | case 306: // DateTime |
|---|
| 129 | case 315: // Artist |
|---|
| 130 | case 316: // HostComputer |
|---|
| 131 | if (isset($field_array['value'])) { |
|---|
| 132 | $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = $field_array['value']; |
|---|
| 133 | } else { |
|---|
| 134 | fseek($getid3->fp, $field_array['offset'], SEEK_SET); |
|---|
| 135 | $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = fread($getid3->fp, $field_array['raw']['length'] * $field_type_byte_length[$field_array['raw']['type']]); |
|---|
| 136 | } |
|---|
| 137 | break; |
|---|
| 138 | } |
|---|
| 139 | switch ($field_array['raw']['tag']) { |
|---|
| 140 | case 256: // ImageWidth |
|---|
| 141 | $getid3->info['video']['resolution_x'] = $field_array['value']; |
|---|
| 142 | break; |
|---|
| 143 | |
|---|
| 144 | case 257: // ImageLength |
|---|
| 145 | $getid3->info['video']['resolution_y'] = $field_array['value']; |
|---|
| 146 | break; |
|---|
| 147 | |
|---|
| 148 | case 258: // BitsPerSample |
|---|
| 149 | if (isset($field_array['value'])) { |
|---|
| 150 | $getid3->info['video']['bits_per_sample'] = $field_array['value']; |
|---|
| 151 | } else { |
|---|
| 152 | $getid3->info['video']['bits_per_sample'] = 0; |
|---|
| 153 | for ($i = 0; $i < $field_array['raw']['length']; $i++) { |
|---|
| 154 | $getid3->info['video']['bits_per_sample'] += getid3_lib::$endian2int(substr($getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'], $i * $field_type_byte_length[$field_array['raw']['type']], $field_type_byte_length[$field_array['raw']['type']])); |
|---|
| 155 | } |
|---|
| 156 | } |
|---|
| 157 | break; |
|---|
| 158 | |
|---|
| 159 | case 259: // Compression |
|---|
| 160 | $getid3->info['video']['codec'] = getid3_tiff::TIFFcompressionMethod($field_array['value']); |
|---|
| 161 | break; |
|---|
| 162 | |
|---|
| 163 | case 270: // ImageDescription |
|---|
| 164 | case 271: // Make |
|---|
| 165 | case 272: // Model |
|---|
| 166 | case 305: // Software |
|---|
| 167 | case 306: // DateTime |
|---|
| 168 | case 315: // Artist |
|---|
| 169 | case 316: // HostComputer |
|---|
| 170 | @$getid3->info['tiff']['comments'][getid3_tiff::TIFFcommentName($field_array['raw']['tag'])][] = $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data']; |
|---|
| 171 | break; |
|---|
| 172 | |
|---|
| 173 | default: |
|---|
| 174 | break; |
|---|
| 175 | } |
|---|
| 176 | } |
|---|
| 177 | } |
|---|
| 178 | |
|---|
| 179 | return true; |
|---|
| 180 | } |
|---|
| 181 | |
|---|
| 182 | |
|---|
| 183 | |
|---|
| 184 | public static function TIFFcompressionMethod($id) { |
|---|
| 185 | |
|---|
| 186 | static $lookup = array ( |
|---|
| 187 | 1 => 'Uncompressed', |
|---|
| 188 | 2 => 'Huffman', |
|---|
| 189 | 3 => 'Fax - CCITT 3', |
|---|
| 190 | 5 => 'LZW', |
|---|
| 191 | 32773 => 'PackBits', |
|---|
| 192 | ); |
|---|
| 193 | return (isset($lookup[$id]) ? $lookup[$id] : 'unknown/invalid ('.$id.')'); |
|---|
| 194 | } |
|---|
| 195 | |
|---|
| 196 | |
|---|
| 197 | |
|---|
| 198 | public static function TIFFcommentName($id) { |
|---|
| 199 | |
|---|
| 200 | static $lookup = array ( |
|---|
| 201 | 270 => 'imagedescription', |
|---|
| 202 | 271 => 'make', |
|---|
| 203 | 272 => 'model', |
|---|
| 204 | 305 => 'software', |
|---|
| 205 | 306 => 'datetime', |
|---|
| 206 | 315 => 'artist', |
|---|
| 207 | 316 => 'hostcomputer', |
|---|
| 208 | ); |
|---|
| 209 | return (isset($lookup[$id]) ? $lookup[$id] : 'unknown/invalid ('.$id.')'); |
|---|
| 210 | } |
|---|
| 211 | |
|---|
| 212 | } |
|---|
| 213 | |
|---|
| 214 | |
|---|
| 215 | ?> |
|---|
