Mercurial > judyates
view e2gallerypro/e2upload/Backend/Assets/getid3/module.audio-video.swf.php @ 28:118cb614cf18 judyates tip
judy bio.
| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Tue, 29 Dec 2015 16:26:18 -0800 |
| parents | 3f6b44aa6b35 |
| children |
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1 <?php2 // +----------------------------------------------------------------------+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 $26 class getid3_swf extends getid3_handler27 {29 public function Analyze() {31 $getid3 = $this->getid3;33 $getid3->info['fileformat'] = 'swf';34 $getid3->info['video']['dataformat'] = 'swf';36 // http://www.openswf.org/spec/SWFfileformat.html38 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);40 $swf_file_data = fread($getid3->fp, $getid3->info['avdataend'] - $getid3->info['avdataoffset']); // 8 + 2 + 2 + max(9) bytes NOT including Frame_Size RECT data42 $getid3->info['swf']['header']['signature'] = substr($swf_file_data, 0, 3);43 switch ($getid3->info['swf']['header']['signature']) {45 case 'FWS':46 $getid3->info['swf']['header']['compressed'] = false;47 break;49 case 'CWS':50 $getid3->info['swf']['header']['compressed'] = true;51 break;53 default:54 throw new getid3_exception('Expecting "FWS" or "CWS" at offset '.$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));59 if (!function_exists('gzuncompress')) {60 throw new getid3_exception('getid3_swf requires --zlib support in PHP.');61 }63 if ($getid3->info['swf']['header']['compressed']) {65 if ($uncompressed_file_data = @gzuncompress(substr($swf_file_data, 8))) {66 $swf_file_data = substr($swf_file_data, 0, 8).$uncompressed_file_data;68 } else {69 throw new getid3_exception('Error decompressing compressed SWF data');70 }72 }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);78 for ($i = 1; $i < $frame_size_data_length; $i++) {79 $frame_size_data_string .= str_pad(decbin(ord(substr($swf_file_data, 8 + $i, 1))), 8, '0', STR_PAD_LEFT);80 }82 list($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);86 // http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm87 // 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 byte89 // (or last depending on how you look at it) is completely ignored.90 // Example: 0x000C -> 0x0C -> 12 So the frame rate is 12 fps.92 // Byte at (8 + $frame_size_data_length) is always zero and ignored93 $getid3->info['swf']['header']['frame_rate'] = getid3_lib::LittleEndian2Int($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));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 $getid3->info['video']['pixel_aspect_ratio'] = (float)1;101 if (($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 }106 // SWF tags108 $current_offset = 12 + $frame_size_data_length;109 $swf_data_length = strlen($swf_file_data);111 while ($current_offset < $swf_data_length) {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 $current_offset += 4;120 }122 unset($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) {129 case 0: // end of movie130 break 2;132 case 9: // Set background color133 $getid3->info['swf']['bgcolor'] = strtoupper(str_pad(dechex(getid3_lib::BigEndian2Int($tag_data['data'])), 6, '0', STR_PAD_LEFT));134 break;136 default:137 /*138 if ($ReturnAllTagData) {139 $getid3->info['swf']['tags'][] = $tag_data;140 }141 */142 break;143 }145 $current_offset += $tag_length;146 }148 return true;149 }151 }154 ?>