MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / vendor / james-heinrich / getid3 / getid3 / module.audio-video.swf.php

diff --git a/vendor/james-heinrich/getid3/getid3/module.audio-video.swf.php b/vendor/james-heinrich/getid3/getid3/module.audio-video.swf.php
new file mode 100644 (file)
index 0000000..178f439
--- /dev/null
+++ b/vendor/james-heinrich/getid3/getid3/module.audio-video.swf.php
@@ -0,0 +1,140 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org>               //
+//  available at http://getid3.sourceforge.net                 //
+//            or http://www.getid3.org                         //
+//          also https://github.com/JamesHeinrich/getID3       //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details                             //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+// module.audio-video.swf.php                                  //
+// module for analyzing Shockwave Flash files                  //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_swf extends getid3_handler
+{
+       public $ReturnAllTagData = false;
+
+       public function Analyze() {
+               $info = &$this->getid3->info;
+
+               $info['fileformat']          = 'swf';
+               $info['video']['dataformat'] = 'swf';
+
+               // http://www.openswf.org/spec/SWFfileformat.html
+
+               $this->fseek($info['avdataoffset']);
+
+               $SWFfileData = $this->fread($info['avdataend'] - $info['avdataoffset']); // 8 + 2 + 2 + max(9) bytes NOT including Frame_Size RECT data
+
+               $info['swf']['header']['signature']  = substr($SWFfileData, 0, 3);
+               switch ($info['swf']['header']['signature']) {
+                       case 'FWS':
+                               $info['swf']['header']['compressed'] = false;
+                               break;
+
+                       case 'CWS':
+                               $info['swf']['header']['compressed'] = true;
+                               break;
+
+                       default:
+                               $this->error('Expecting "FWS" or "CWS" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['swf']['header']['signature']).'"');
+                               unset($info['swf']);
+                               unset($info['fileformat']);
+                               return false;
+                               break;
+               }
+               $info['swf']['header']['version'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 3, 1));
+               $info['swf']['header']['length']  = getid3_lib::LittleEndian2Int(substr($SWFfileData, 4, 4));
+
+               if ($info['swf']['header']['compressed']) {
+                       $SWFHead     = substr($SWFfileData, 0, 8);
+                       $SWFfileData = substr($SWFfileData, 8);
+                       if ($decompressed = @gzuncompress($SWFfileData)) {
+                               $SWFfileData = $SWFHead.$decompressed;
+                       } else {
+                               $this->error('Error decompressing compressed SWF data ('.strlen($SWFfileData).' bytes compressed, should be '.($info['swf']['header']['length'] - 8).' bytes uncompressed)');
+                               return false;
+                       }
+               }
+
+               $FrameSizeBitsPerValue = (ord(substr($SWFfileData, 8, 1)) & 0xF8) >> 3;
+               $FrameSizeDataLength   = ceil((5 + (4 * $FrameSizeBitsPerValue)) / 8);
+               $FrameSizeDataString   = str_pad(decbin(ord(substr($SWFfileData, 8, 1)) & 0x07), 3, '0', STR_PAD_LEFT);
+               for ($i = 1; $i < $FrameSizeDataLength; $i++) {
+                       $FrameSizeDataString .= str_pad(decbin(ord(substr($SWFfileData, 8 + $i, 1))), 8, '0', STR_PAD_LEFT);
+               }
+               list($X1, $X2, $Y1, $Y2) = explode("\n", wordwrap($FrameSizeDataString, $FrameSizeBitsPerValue, "\n", 1));
+               $info['swf']['header']['frame_width']  = getid3_lib::Bin2Dec($X2);
+               $info['swf']['header']['frame_height'] = getid3_lib::Bin2Dec($Y2);
+
+               // http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm
+               // Next in the header is the frame rate, which is kind of weird.
+               // It is supposed to be stored as a 16bit integer, but the first byte
+               // (or last depending on how you look at it) is completely ignored.
+               // Example: 0x000C  ->  0x0C  ->  12     So the frame rate is 12 fps.
+
+               // Byte at (8 + $FrameSizeDataLength) is always zero and ignored
+               $info['swf']['header']['frame_rate']  = getid3_lib::LittleEndian2Int(substr($SWFfileData,  9 + $FrameSizeDataLength, 1));
+               $info['swf']['header']['frame_count'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 10 + $FrameSizeDataLength, 2));
+
+               $info['video']['frame_rate']         = $info['swf']['header']['frame_rate'];
+               $info['video']['resolution_x']       = intval(round($info['swf']['header']['frame_width']  / 20));
+               $info['video']['resolution_y']       = intval(round($info['swf']['header']['frame_height'] / 20));
+               $info['video']['pixel_aspect_ratio'] = (float) 1;
+
+               if (($info['swf']['header']['frame_count'] > 0) && ($info['swf']['header']['frame_rate'] > 0)) {
+                       $info['playtime_seconds'] = $info['swf']['header']['frame_count'] / $info['swf']['header']['frame_rate'];
+               }
+//echo __LINE__.'='.number_format(microtime(true) - $start_time, 3).'<br>';
+
+
+               // SWF tags
+
+               $CurrentOffset = 12 + $FrameSizeDataLength;
+               $SWFdataLength = strlen($SWFfileData);
+
+               while ($CurrentOffset < $SWFdataLength) {
+//echo __LINE__.'='.number_format(microtime(true) - $start_time, 3).'<br>';
+
+                       $TagIDTagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 2));
+                       $TagID     = ($TagIDTagLength & 0xFFFC) >> 6;
+                       $TagLength = ($TagIDTagLength & 0x003F);
+                       $CurrentOffset += 2;
+                       if ($TagLength == 0x3F) {
+                               $TagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 4));
+                               $CurrentOffset += 4;
+                       }
+
+                       unset($TagData);
+                       $TagData['offset'] = $CurrentOffset;
+                       $TagData['size']   = $TagLength;
+                       $TagData['id']     = $TagID;
+                       $TagData['data']   = substr($SWFfileData, $CurrentOffset, $TagLength);
+                       switch ($TagID) {
+                               case 0: // end of movie
+                                       break 2;
+
+                               case 9: // Set background color
+                                       //$info['swf']['tags'][] = $TagData;
+                                       $info['swf']['bgcolor'] = strtoupper(str_pad(dechex(getid3_lib::BigEndian2Int($TagData['data'])), 6, '0', STR_PAD_LEFT));
+                                       break;
+
+                               default:
+                                       if ($this->ReturnAllTagData) {
+                                               $info['swf']['tags'][] = $TagData;
+                                       }
+                                       break;
+                       }
+
+                       $CurrentOffset += $TagLength;
+               }
+
+               return true;
+       }
+
+}