On integre getID3 pour permettre la lecture des metadata des video (largeur,...

On integre getID3 pour permettre la lecture des metadata des video (largeur, hauteur, duree) (version tres simplifiee de ce que fait le plugin getID3, merci a kent1)
+ bugfix sur l'affichage en taille reduite dans le formulaire d'edition

lib/getid3/module.audio-video.swf.php

+<?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:
+				$info['error'][] = 'Expecting "FWS" or "CWS" at offset '.$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 {
+				$info['error'][] = 'Error decompressing compressed SWF data ('.strlen($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;
+	}
+
+}