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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.audio-video.swf.php @ 3:3f6b44aa6b35 judyates

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[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
author rlm
date Mon, 22 Feb 2010 08:02:39 -0500
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2:670229c4eb4b 3:3f6b44aa6b35
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.audio-video.swf.php |
18 // | module for analyzing Macromedia Shockwave Flash files. |
19 // | dependencies: zlib support in PHP |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.audio-video.swf.php,v 1.2 2006/11/02 10:48:00 ah Exp $
23
24
25
26 class getid3_swf extends getid3_handler
27 {
28
29 public function Analyze() {
30
31 $getid3 = $this->getid3;
32
33 $getid3->info['fileformat'] = 'swf';
34 $getid3->info['video']['dataformat'] = 'swf';
35
36 // http://www.openswf.org/spec/SWFfileformat.html
37
38 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
39
40 $swf_file_data = fread($getid3->fp, $getid3->info['avdataend'] - $getid3->info['avdataoffset']); // 8 + 2 + 2 + max(9) bytes NOT including Frame_Size RECT data
41
42 $getid3->info['swf']['header']['signature'] = substr($swf_file_data, 0, 3);
43 switch ($getid3->info['swf']['header']['signature']) {
44
45 case 'FWS':
46 $getid3->info['swf']['header']['compressed'] = false;
47 break;
48
49 case 'CWS':
50 $getid3->info['swf']['header']['compressed'] = true;
51 break;
52
53 default:
54 throw new getid3_exception('Expecting "FWS" or "CWS" at offset '.$getid3->info['avdataoffset'].', found "'.$getid3->info['swf']['header']['signature'].'"');
55 }
56 $getid3->info['swf']['header']['version'] = getid3_lib::LittleEndian2Int($swf_file_data{3});
57 $getid3->info['swf']['header']['length'] = getid3_lib::LittleEndian2Int(substr($swf_file_data, 4, 4));
58
59 if (!function_exists('gzuncompress')) {
60 throw new getid3_exception('getid3_swf requires --zlib support in PHP.');
61 }
62
63 if ($getid3->info['swf']['header']['compressed']) {
64
65 if ($uncompressed_file_data = @gzuncompress(substr($swf_file_data, 8))) {
66 $swf_file_data = substr($swf_file_data, 0, 8).$uncompressed_file_data;
67
68 } else {
69 throw new getid3_exception('Error decompressing compressed SWF data');
70 }
71
72 }
73
74 $frame_size_bits_per_value = (ord(substr($swf_file_data, 8, 1)) & 0xF8) >> 3;
75 $frame_size_data_length = ceil((5 + (4 * $frame_size_bits_per_value)) / 8);
76 $frame_size_data_string = str_pad(decbin(ord($swf_file_data[8]) & 0x07), 3, '0', STR_PAD_LEFT);
77
78 for ($i = 1; $i < $frame_size_data_length; $i++) {
79 $frame_size_data_string .= str_pad(decbin(ord(substr($swf_file_data, 8 + $i, 1))), 8, '0', STR_PAD_LEFT);
80 }
81
82 list($x1, $x2, $y1, $y2) = explode("\n", wordwrap($frame_size_data_string, $frame_size_bits_per_value, "\n", 1));
83 $getid3->info['swf']['header']['frame_width'] = bindec($x2);
84 $getid3->info['swf']['header']['frame_height'] = bindec($y2);
85
86 // http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm
87 // Next in the header is the frame rate, which is kind of weird.
88 // It is supposed to be stored as a 16bit integer, but the first byte
89 // (or last depending on how you look at it) is completely ignored.
90 // Example: 0x000C -> 0x0C -> 12 So the frame rate is 12 fps.
91
92 // Byte at (8 + $frame_size_data_length) is always zero and ignored
93 $getid3->info['swf']['header']['frame_rate'] = getid3_lib::LittleEndian2Int($swf_file_data[9 + $frame_size_data_length]);
94 $getid3->info['swf']['header']['frame_count'] = getid3_lib::LittleEndian2Int(substr($swf_file_data, 10 + $frame_size_data_length, 2));
95
96 $getid3->info['video']['frame_rate'] = $getid3->info['swf']['header']['frame_rate'];
97 $getid3->info['video']['resolution_x'] = intval(round($getid3->info['swf']['header']['frame_width'] / 20));
98 $getid3->info['video']['resolution_y'] = intval(round($getid3->info['swf']['header']['frame_height'] / 20));
99 $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
100
101 if (($getid3->info['swf']['header']['frame_count'] > 0) && ($getid3->info['swf']['header']['frame_rate'] > 0)) {
102 $getid3->info['playtime_seconds'] = $getid3->info['swf']['header']['frame_count'] / $getid3->info['swf']['header']['frame_rate'];
103 }
104
105
106 // SWF tags
107
108 $current_offset = 12 + $frame_size_data_length;
109 $swf_data_length = strlen($swf_file_data);
110
111 while ($current_offset < $swf_data_length) {
112
113 $tag_ID_tag_length = getid3_lib::LittleEndian2Int(substr($swf_file_data, $current_offset, 2));
114 $tag_ID = ($tag_ID_tag_length & 0xFFFC) >> 6;
115 $tag_length = ($tag_ID_tag_length & 0x003F);
116 $current_offset += 2;
117 if ($tag_length == 0x3F) {
118 $tag_length = getid3_lib::LittleEndian2Int(substr($swf_file_data, $current_offset, 4));
119 $current_offset += 4;
120 }
121
122 unset($tag_data);
123 $tag_data['offset'] = $current_offset;
124 $tag_data['size'] = $tag_length;
125 $tag_data['id'] = $tag_ID;
126 $tag_data['data'] = substr($swf_file_data, $current_offset, $tag_length);
127 switch ($tag_ID) {
128
129 case 0: // end of movie
130 break 2;
131
132 case 9: // Set background color
133 $getid3->info['swf']['bgcolor'] = strtoupper(str_pad(dechex(getid3_lib::BigEndian2Int($tag_data['data'])), 6, '0', STR_PAD_LEFT));
134 break;
135
136 default:
137 /*
138 if ($ReturnAllTagData) {
139 $getid3->info['swf']['tags'][] = $tag_data;
140 }
141 */
142 break;
143 }
144
145 $current_offset += $tag_length;
146 }
147
148 return true;
149 }
150
151 }
152
153
154 ?>