Initial commit

1 files changed, 145 insertions, 0 deletions

diff --git a/includes/getid3/module.audio-video.swf.php b/includes/getid3/module.audio-video.swf.php
new file mode 100644
index 0000000..fc4a5c5
--- /dev/null
+++ b/includes/getid3/module.audio-video.swf.php
@@ -0,0 +1,145 @@
+<?php
+
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org>               //
+//  available at https://github.com/JamesHeinrich/getID3       //
+//            or https://www.getid3.org                        //
+//            or http://getid3.sourceforge.net                 //
+//  see readme.txt for more details                            //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+// module.audio-video.swf.php                                  //
+// module for analyzing Shockwave Flash files                  //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
+	exit;
+}
+
+class getid3_swf extends getid3_handler
+{
+	public $ReturnAllTagData = false;
+
+	/**
+	 * @return bool
+	 */
+	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;
+		}
+		$info['swf']['header']['version'] = getid3_lib::LittleEndian2Int(substr($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;
+	}
+
+}