summaryrefslogtreecommitdiffstats
path: root/modules/getid3/module.graphic.tiff.php
diff options
context:
space:
mode:
Diffstat (limited to 'modules/getid3/module.graphic.tiff.php')
-rw-r--r--modules/getid3/module.graphic.tiff.php215
1 files changed, 215 insertions, 0 deletions
diff --git a/modules/getid3/module.graphic.tiff.php b/modules/getid3/module.graphic.tiff.php
new file mode 100644
index 00000000..f0f5a2e8
--- /dev/null
+++ b/modules/getid3/module.graphic.tiff.php
@@ -0,0 +1,215 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP version 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 2 of the GPL license, |
+// | that is bundled with this package in the file license.txt and is |
+// | available through the world-wide-web at the following url: |
+// | http://www.gnu.org/copyleft/gpl.html |
+// +----------------------------------------------------------------------+
+// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
+// +----------------------------------------------------------------------+
+// | Authors: James Heinrich <infoØgetid3*org> |
+// | Allan Hansen <ahØartemis*dk> |
+// +----------------------------------------------------------------------+
+// | module.graphic.tiff.php |
+// | Module for analyzing TIFF graphic files. |
+// | dependencies: NONE |
+// +----------------------------------------------------------------------+
+//
+// $Id: module.graphic.tiff.php,v 1.2 2006/11/02 10:48:02 ah Exp $
+
+
+
+class getid3_tiff extends getid3_handler
+{
+
+ public function Analyze() {
+
+ $getid3 = $this->getid3;
+
+ fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
+ $tiff_header = fread($getid3->fp, 4);
+
+ $getid3->info['tiff']['byte_order'] = substr($tiff_header, 0, 2) == 'II' ? 'Intel' : 'Motorola';
+ $endian2int = substr($tiff_header, 0, 2) == 'II' ? 'LittleEndian2Int' : 'BigEndian2Int';
+
+ $getid3->info['fileformat'] = 'tiff';
+ $getid3->info['video']['dataformat'] = 'tiff';
+ $getid3->info['video']['lossless'] = true;
+ $getid3->info['tiff']['ifd'] = array ();
+ $current_ifd = array ();
+
+ $field_type_byte_length = array (1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
+
+ $next_ifd_offset = getid3_lib::$endian2int(fread($getid3->fp, 4));
+
+ while ($next_ifd_offset > 0) {
+
+ $current_ifd['offset'] = $next_ifd_offset;
+
+ fseek($getid3->fp, $getid3->info['avdataoffset'] + $next_ifd_offset, SEEK_SET);
+ $current_ifd['fieldcount'] = getid3_lib::$endian2int(fread($getid3->fp, 2));
+
+ for ($i = 0; $i < $current_ifd['fieldcount']; $i++) {
+
+ // shortcut
+ $current_ifd['fields'][$i] = array ();
+ $current_ifd_fields_i = &$current_ifd['fields'][$i];
+
+ $current_ifd_fields_i['raw']['tag'] = getid3_lib::$endian2int(fread($getid3->fp, 2));
+ $current_ifd_fields_i['raw']['type'] = getid3_lib::$endian2int(fread($getid3->fp, 2));
+ $current_ifd_fields_i['raw']['length'] = getid3_lib::$endian2int(fread($getid3->fp, 4));
+ $current_ifd_fields_i['raw']['offset'] = fread($getid3->fp, 4);
+
+ switch ($current_ifd_fields_i['raw']['type']) {
+ case 1: // BYTE An 8-bit unsigned integer.
+ if ($current_ifd_fields_i['raw']['length'] <= 4) {
+ $current_ifd_fields_i['value'] = getid3_lib::$endian2int(substr($current_ifd_fields_i['raw']['offset'], 0, 1));
+ } else {
+ $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']);
+ }
+ break;
+
+ case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null.
+ if ($current_ifd_fields_i['raw']['length'] <= 4) {
+ $current_ifd_fields_i['value'] = substr($current_ifd_fields_i['raw']['offset'], 3);
+ } else {
+ $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']);
+ }
+ break;
+
+ case 3: // SHORT A 16-bit (2-byte) unsigned integer.
+ if ($current_ifd_fields_i['raw']['length'] <= 2) {
+ $current_ifd_fields_i['value'] = getid3_lib::$endian2int(substr($current_ifd_fields_i['raw']['offset'], 0, 2));
+ } else {
+ $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']);
+ }
+ break;
+
+ case 4: // LONG A 32-bit (4-byte) unsigned integer.
+ if ($current_ifd_fields_i['raw']['length'] <= 1) {
+ $current_ifd_fields_i['value'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']);
+ } else {
+ $current_ifd_fields_i['offset'] = getid3_lib::$endian2int($current_ifd_fields_i['raw']['offset']);
+ }
+ break;
+
+ case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator.
+ break;
+ }
+ }
+
+ $getid3->info['tiff']['ifd'][] = $current_ifd;
+ $current_ifd = array ();
+ $next_ifd_offset = getid3_lib::$endian2int(fread($getid3->fp, 4));
+
+ }
+
+ foreach ($getid3->info['tiff']['ifd'] as $ifd_id => $ifd_array) {
+ foreach ($ifd_array['fields'] as $key => $field_array) {
+ switch ($field_array['raw']['tag']) {
+ case 256: // ImageWidth
+ case 257: // ImageLength
+ case 258: // BitsPerSample
+ case 259: // Compression
+ if (!isset($field_array['value'])) {
+ fseek($getid3->fp, $field_array['offset'], SEEK_SET);
+ $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = fread($getid3->fp, $field_array['raw']['length'] * $field_type_byte_length[$field_array['raw']['type']]);
+ }
+ break;
+
+ case 270: // ImageDescription
+ case 271: // Make
+ case 272: // Model
+ case 305: // Software
+ case 306: // DateTime
+ case 315: // Artist
+ case 316: // HostComputer
+ if (isset($field_array['value'])) {
+ $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = $field_array['value'];
+ } else {
+ fseek($getid3->fp, $field_array['offset'], SEEK_SET);
+ $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'] = fread($getid3->fp, $field_array['raw']['length'] * $field_type_byte_length[$field_array['raw']['type']]);
+ }
+ break;
+ }
+ switch ($field_array['raw']['tag']) {
+ case 256: // ImageWidth
+ $getid3->info['video']['resolution_x'] = $field_array['value'];
+ break;
+
+ case 257: // ImageLength
+ $getid3->info['video']['resolution_y'] = $field_array['value'];
+ break;
+
+ case 258: // BitsPerSample
+ if (isset($field_array['value'])) {
+ $getid3->info['video']['bits_per_sample'] = $field_array['value'];
+ } else {
+ $getid3->info['video']['bits_per_sample'] = 0;
+ for ($i = 0; $i < $field_array['raw']['length']; $i++) {
+ $getid3->info['video']['bits_per_sample'] += getid3_lib::$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']]));
+ }
+ }
+ break;
+
+ case 259: // Compression
+ $getid3->info['video']['codec'] = getid3_tiff::TIFFcompressionMethod($field_array['value']);
+ break;
+
+ case 270: // ImageDescription
+ case 271: // Make
+ case 272: // Model
+ case 305: // Software
+ case 306: // DateTime
+ case 315: // Artist
+ case 316: // HostComputer
+ @$getid3->info['tiff']['comments'][getid3_tiff::TIFFcommentName($field_array['raw']['tag'])][] = $getid3->info['tiff']['ifd'][$ifd_id]['fields'][$key]['raw']['data'];
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ return true;
+ }
+
+
+
+ public static function TIFFcompressionMethod($id) {
+
+ static $lookup = array (
+ 1 => 'Uncompressed',
+ 2 => 'Huffman',
+ 3 => 'Fax - CCITT 3',
+ 5 => 'LZW',
+ 32773 => 'PackBits',
+ );
+ return (isset($lookup[$id]) ? $lookup[$id] : 'unknown/invalid ('.$id.')');
+ }
+
+
+
+ public static function TIFFcommentName($id) {
+
+ static $lookup = array (
+ 270 => 'imagedescription',
+ 271 => 'make',
+ 272 => 'model',
+ 305 => 'software',
+ 306 => 'datetime',
+ 315 => 'artist',
+ 316 => 'hostcomputer',
+ );
+ return (isset($lookup[$id]) ? $lookup[$id] : 'unknown/invalid ('.$id.')');
+ }
+
+}
+
+
+?> \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-08-13 09:51:53 +0000