/*
 * @(#)SimplePlayerApplet.java  1.2 01/03/13 

 *
 * Copyright (c) 1996-2001 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
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 * the design, construction, operation or maintenance of any nuclear
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 */

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.lang.String;
import java.net.URL;
import java.net.MalformedURLException;
import java.io.IOException;
import java.util.Properties;
import javax.media.*;
//import com.sun.media.util.JMFSecurity;

/**
  * This is a Java Applet that demonstrates how to create a simple
  * media player with a media event listener. It will play the
  * media clip right away and continuously loop.
  * 
  *<!-- Sample HTML  * <applet code=SimplePlayerApplet width=320 height=300>  * <param name=file value="sun.avi">  * </applet>  * --> 
  */
public class SimplePlayerApplet extends Applet implements ControllerListener {
    
    // media Player
    Player player = null;
    // component in which video is playing
    Component visualComponent = null;
    // controls gain, position, start, stop
    Component controlComponent = null;
    // displays progress during download
    Component progressBar = null;
    boolean firstTime = true;
    long CachingSize = 0L;    
    Panel panel = null;
    int controlPanelHeight = 0;
    int videoWidth = 0;
    int videoHeight = 0;

    /**
     * Read the applet file parameter and create the media 
     * player.
     */
    public void init() {
        //$ System.out.println("Applet.init() is called");
        setLayout(null);
        setBackground(Color.white);
        panel = new Panel();
        panel.setLayout( null );
        add(panel);
        panel.setBounds(0, 0, 320, 240);

        // input file name from html param
        String mediaFile = null;
        // URL for our media file
        MediaLocator mrl = null;
        URL url = null;

        // Get the media filename info.
        // The applet tag should contain the path to the
        // source media file, relative to the html page.
        
        if ((mediaFile = getParameter("FILE")) == null)
            Fatal("Invalid media file parameter");

        try {
            url = new URL(getDocumentBase(), mediaFile);
            mediaFile = url.toExternalForm();
        } catch (MalformedURLException mue) {
        }
        
        try {
            // Create a media locator from the file name
            if ((mrl = new MediaLocator(mediaFile)) == null)
                Fatal("Can't build URL for " + mediaFile);

            /*
            try {
                JMFSecurity.enablePrivilege.invoke(JMFSecurity.privilegeManager,
                                                   JMFSecurity.writePropArgs);
                JMFSecurity.enablePrivilege.invoke(JMFSecurity.privilegeManager,
                                                   JMFSecurity.readPropArgs);
                JMFSecurity.enablePrivilege.invoke(JMFSecurity.privilegeManager,
                                                   JMFSecurity.connectArgs);
            } catch (Exception e) {}
            */
            
            // Create an instance of a player for this media
            try {
                player = Manager.createPlayer(mrl);
            } catch (NoPlayerException e) {
                System.out.println(e);
                Fatal("Could not create player for " + mrl);
            }

            // Add ourselves as a listener for a player's events
            player.addControllerListener(this);

        } catch (MalformedURLException e) {
            Fatal("Invalid media file URL!");
        } catch (IOException e) {
            Fatal("IO exception creating player for " + mrl);
        }

        // This applet assumes that its start() calls 
        // player.start(). This causes the player to become
        // realized. Once realized, the applet will get
        // the visual and control panel components and add
        // them to the Applet. These components are not added
        // during init() because they are long operations that
        // would make us appear unresposive to the user.
    }

    /**
     * Start media file playback. This function is called the
     * first time that the Applet runs and every
     * time the user re-enters the page.
     */

    public void start() {
        //$ System.out.println("Applet.start() is called");
        // Call start() to prefetch and start the player.
        if (player != null)
            player.start();
    }

    /**
     * Stop media file playback and release resource before
     * leaving the page.
     */
    public void stop() {
        //$ System.out.println("Applet.stop() is called");
        if (player != null) {
            player.stop();
            player.deallocate();
        }
    }

    public void destroy() {
        //$ System.out.println("Applet.destroy() is called");
        player.close();
    }


    /**
     * This controllerUpdate function must be defined in order to
     * implement a ControllerListener interface. This 
     * function will be called whenever there is a media event
     */
    public synchronized void controllerUpdate(ControllerEvent event) {
        // If we're getting messages from a dead player, 
        // just leave
        if (player == null)
            return;
        
        // When the player is Realized, get the visual 
        // and control components and add them to the Applet
        if (event instanceof RealizeCompleteEvent) {
            if (progressBar != null) {
                panel.remove(progressBar);
                progressBar = null;
            }

            int width = 320;
            int height = 0;
            if (controlComponent == null)
                if (( controlComponent = 
                      player.getControlPanelComponent()) != null) {
                    
                    controlPanelHeight = controlComponent.getPreferredSize().height;
                    panel.add(controlComponent);
                    height += controlPanelHeight;
                }
            if (visualComponent == null)
                if (( visualComponent =
                      player.getVisualComponent())!= null) {
                    panel.add(visualComponent);
                    Dimension videoSize = visualComponent.getPreferredSize();
                    videoWidth = videoSize.width;
                    videoHeight = videoSize.height;
                    width = videoWidth;
                    height += videoHeight;
                    visualComponent.setBounds(0, 0, videoWidth, videoHeight);
                }

            panel.setBounds(0, 0, width, height);
            if (controlComponent != null) {
                controlComponent.setBounds(0, videoHeight,
                                           width, controlPanelHeight);
                controlComponent.invalidate();
            }
            
        } else if (event instanceof CachingControlEvent) {
            if (player.getState() > Controller.Realizing)
                return;
            // Put a progress bar up when downloading starts, 
            // take it down when downloading ends.
            CachingControlEvent e = (CachingControlEvent) event;
            CachingControl cc = e.getCachingControl();

            // Add the bar if not already there ...
            if (progressBar == null) {
                if ((progressBar = cc.getControlComponent()) != null) {
                    panel.add(progressBar);
                    panel.setSize(progressBar.getPreferredSize());
                    validate();
                }
            }
        } else if (event instanceof EndOfMediaEvent) {
            // We've reached the end of the media; rewind and
            // start over
            player.setMediaTime(new Time(0));
            player.start();
        } else if (event instanceof ControllerErrorEvent) {
            // Tell TypicalPlayerApplet.start() to call it a day
            player = null;
            Fatal(((ControllerErrorEvent)event).getMessage());
        } else if (event instanceof ControllerClosedEvent) {
            panel.removeAll();
        }
    }

    void Fatal (String s) {
        // Applications will make various choices about what
        // to do here. We print a message
        System.err.println("FATAL ERROR: " + s);
        throw new Error(s); // Invoke the uncaught exception
                            // handler System.exit() is another
                            // choice.
        
    }
}