/*
 * File    : JMFAudioPlayer.java
 * Created : 25-may-2002 19:27
 * 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.bags.MediaBag;
import edu.xtec.util.ExtendedByteArrayInputStream;



/**
 *
 * @author  Francesc Busquets (fbusquets@xtec.cat)
 * @version 1.0
 */
public class JMFAudioPlayer implements AudioPlayer{

    protected javax.media.Player player;
    public static final javax.media.Time zeroTime=new javax.media.Time(0L);
    
    /** Creates new JMFAudioPlayer */
    public JMFAudioPlayer() {
        player=null;
    }

    public boolean setDataSource(Object source) throws Exception{
        close();
        
        if(source instanceof ExtendedByteArrayInputStream){
            player=javax.media.Manager.createPlayer(new ByteDataSource((ExtendedByteArrayInputStream)source));
        }
        else if(source instanceof String){
            javax.media.MediaLocator ml=new javax.media.MediaLocator((String)source);
            javax.media.protocol.DataSource dataSource=javax.media.Manager.createDataSource(ml);
            player=javax.media.Manager.createPlayer(dataSource);            
        }
        
        return player!=null;
    }
    
    public void realize(String fileName, MediaBag mediaBag) throws Exception{
        if(fileName!=null)
            setDataSource(mediaBag.getMediaDataSource(fileName));
        if(player!=null)
            player.realize();
    }
    
    public void close(){
        if(player!=null){
            player.close();
            player=null;
        }
    }
    
    public void play(){
        try{
            stop();
            player.setMediaTime(zeroTime);
            player.start();
        } catch(Exception ex){
            System.err.println("Error playing system sound:\n"+ex);
        }
    }
    
    public void stop(){
        if(player!=null && player.getState()>=javax.media.Player.Started)
            player.stop();
    }
    
}