CheckMediaSystem.java

/*
 * File    : CheckMediaSystem.java
 * Created : 08-jul-2002 23:06
 * By      : fbusquets
 *
 * JClic - Authoring and playing system for educational activities
 *
 * Copyright (C) 2000 - 2005 Francesc Busquets & Departament
 * d'Educacio de la Generalitat de Catalunya                                        
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details (see the LICENSE file).
 */

package edu.xtec.jclic.media;

import edu.xtec.jclic.Constants;
import edu.xtec.util.Check;
import edu.xtec.util.Options;

/**
 *
 * @author  Francesc Busquets (fbusquets@xtec.cat)
 * @version 13.08.28
 */
public final class CheckMediaSystem {
    
    public static final String QTLOCK="QTLOCK";
    static final String BUNDLE="messages.CheckMediaSystemMessages";
    public static Object qtLock=null;
    public static Object qt61Lock=null;
            
    public static boolean check(Options options, boolean showWarning){
        
        boolean result=false;
        
        boolean qt=(qtLock!=null);        
        boolean qt61=(qt61Lock!=null);
        
        // Modified 18-oct-2005
        // Problems with QTJava for Windows: security exception "QTJava has expired" 
        // makes Java crash. Use QT only with Mac OS X.
        boolean checkQT=(options.getBoolean(Options.MAC) && !options.getBoolean(Options.ARCH64BIT))
        || Constants.TRUE.equalsIgnoreCase(System.getProperty("FORCE_USE_QT"));
        
        if(checkQT && !qt61){
            try{
                // 03-Apr-2008: Perform a previous check of the class as resource in order to avoid
                // uncatchable exceptions in applets                
                if(CheckMediaSystem.class.getResource("/quicktime/app/view/QTFactory.class")!=null){
                    Class.forName("quicktime.app.view.QTFactory");
                    qt61=true;
                    qt=false;
                }
            }catch(Exception ex){
                // No quicktime 6.1 available
            }
        }
        options.put(Constants.QT61, qt61);
        
        // 27-Nov-2007: QuickTime 6.0 or previous is not yet supported by JClic
		/*
        if(checkQT && !qt && !qt61 &&
            !options.getBoolean(Options.JAVA14)){
                // QuickTime for java doesn't work with Java 1.4!!!
            //((options.getBoolean(Options.WIN) && !options.getBoolean(Options.JAVA14))
            //||(options.getBoolean(Options.MAC)))){
            try{
		Class.forName("quicktime.QTSession");
                qt=true;
            } catch(Exception ex){
                // no quicktime available
            }
        }
		*/
        options.put(Constants.QT, qt);

        boolean jmf=false;
        try{
            // 03-Apr-2008: Perform a previous check of the class as resource in order to avoid
            // uncatchable exceptions in applets
            if(CheckMediaSystem.class.getResource("/javax/media/Player.class")!=null){
                Class.forName("javax.media.Player");
                jmf=true;
            }
        } catch(Exception ex){
            // no JMF available
        }
        options.put(Constants.JMF, jmf);
        
        String mediaSystem=(String)options.get(Constants.MEDIA_SYSTEM);
        if(mediaSystem!=null){
            if(mediaSystem.equals(Constants.QT)){
                if(qt61)
                    mediaSystem=Constants.QT61;
                else if(!qt)
                    mediaSystem=null;
            }
            else if(mediaSystem.equals(Constants.JMF)){
                if(!jmf)
                    mediaSystem=null;
            }
            else
                mediaSystem=null;
        }
        if(mediaSystem==null)
            mediaSystem=qt61 ? Constants.QT61 : /*qt ? Constants.QT : */ jmf ? Constants.JMF : null;
            
        if(mediaSystem!=null && mediaSystem.equals(Constants.QT61) && qt61Lock==null){
            try{
                // 03-Apr-2008
                // QT61Tools are now included in jclic.jar, so the direct constructor
                // can be used.
                //Class cl=Class.forName("edu.xtec.jclic.media.QT61Tools");
                //qt61Lock=cl.newInstance();
                qt61Lock=new edu.xtec.jclic.media.QT61Tools();
                //qt61=(qt61Lock!=null);
                options.put(QTLOCK, qt61Lock);
            } catch(Exception ex){
                options.getMessages().showErrorWarning(options.getMainComponent(), "media_qt_error_initializing", ex);
                mediaSystem=jmf ? Constants.JMF : null;
            }
        }
		// 27-Nov-2007: QuickTime 6.0 or previous is not yet supported by JClic
		/*
        if(mediaSystem==Constants.QT && qtLock==null){
            try{
                Class cl=Class.forName("edu.xtec.jclic.media.QTTools");
                qtLock=cl.newInstance();
                qt=(qtLock!=null);
                options.put(QTLOCK, qtLock);
            } catch(Exception ex){
                options.getMessages().showErrorWarning(options.getMainComponent(), "media_qt_error_initializing", ex);
                mediaSystem=jmf ? Constants.JMF : null;
            }
        }
		*/
        
        options.put(Constants.MEDIA_SYSTEM, mediaSystem);
        
        if(showWarning && mediaSystem==null)
            warn(options);
        
        return mediaSystem!=null;
    }
    
    public static void warn(Options options){
        //if(options.get(Constants.MEDIA_SYSTEM)==null){
            if(!options.getBoolean(Constants.NO_MEDIASYSTEM_WARN)){
                Check.showUrlPane(options, "media_check_url");
                options.putBoolean(Constants.NO_MEDIASYSTEM_WARN, true);
            }            
        //}
    }    
}