//------------------------------------------------------------------------------
// playau.java - plays a .au sound
// Copyright 1997, All rights reserved
// Version: 1.6
// Author: Jon McCain
// Created: 7/14/96
// Modified: 10/9/97,added more paramters
//------------------------------------------------------------------------------
//Parameters:  sound      - name of the sound file (au) to play
//             playtime   - number of frames to show, controls how long the
//                          image is animated.
//             imgstrip   - Image strip with frames to show (default=playau.gif)
//             numframes  - number of frames in the image strip (default=4)
//             framedelay - delay time between each frame (default=200ms)
//                          note: changing this affects the playtime parameter
//             autoplay   - 1=play sound as soon as applet starts (default=1)
//                          0=wait until mouse click to play the sound


import java.io.InputStream;
import java.awt.*;
import java.net.*;

public class playau extends java.applet.Applet implements Runnable {

   Thread playit = null;
   MediaTracker tracker;
   String imagename;
   Image imgstrip;
   String sound;
   int frame,numframes,framedelay;
   int elapsed,playtime;
   int autoplay;
   boolean clicked;

   public String getAppletInfo()
     { return "Au Player 1.6 By Jon McCain"; }

   // Read the parameters
   public void init()
   {
     sound = getParameter("sound");
     String at = getParameter("playtime");
	  playtime = (at != null) ? Integer.valueOf(at).intValue() : 10;
     imagename = getParameter("imgstrip");
     if (imagename == null) imagename = "playau.gif";
     at = getParameter("numframes");
	  numframes = (at != null) ? Integer.valueOf(at).intValue() : 4;
     at = getParameter("framedelay");
	  framedelay = (at != null) ? Integer.valueOf(at).intValue() : 200;
     at = getParameter("autoplay");
	  autoplay = (at != null) ? Integer.valueOf(at).intValue() : 1;
     clicked = false;

     // start loading the images of the speaker
     tracker = new MediaTracker(this);
     imgstrip = getImage(getDocumentBase(), imagename);
     tracker.addImage(imgstrip, 0);
   }

   public void run()
   {
	  Thread.currentThread().setPriority(Thread.MIN_PRIORITY);

     //Wait until image loaded.
     try { tracker.waitForAll(); }
     catch (InterruptedException e) {}
     frame = 0;
     repaint();

     if (autoplay == 1 || clicked)
     {
       //start a thread to play the sound
       play(getCodeBase(), sound);

       //Now cycle the image through the frames a certain number of times
       //Hopefully user set playtime just right so we stay in this loop
       //until the sound finishes.
       elapsed = 0;
       while (playit != null)
       {
	      if (++frame >= numframes)
               frame = 0;
		   repaint();
		   try { Thread.sleep(framedelay); }
         catch (InterruptedException e) { break; }
         if (++elapsed > playtime) playit = null;
	    }
     }

     //go back to the very first frame
     frame = 0;
     repaint();
     clicked = false;
     playit = null;
   }

   public void update(Graphics g) { paint(g); }

   public void paint(Graphics g)
   {
    if (imgstrip != null)
    {
       int stripWidth = imgstrip.getWidth(this);
       int stripHeight = imgstrip.getHeight(this);
       int imageWidth = stripWidth / numframes;
       g.clipRect(0, 0, imageWidth, stripHeight);
       g.drawImage(imgstrip, -frame*imageWidth, 0, this);
    }
   }

   public void start()
   {
     if (playit == null)
     {
	    playit = new Thread(this);
	    playit.start();
     }
   }

   public void stop() { playit = null; }

   // allow a mouse click to play the sound again
   public boolean handleEvent(Event evt)
   {
	  if (evt.id == Event.MOUSE_DOWN)
     {
    	 clicked = true;
       if (playit == null)
       {
         playit = new Thread(this);
         playit.start();
       }
     	 return true;
     }
     else return super.handleEvent(evt);
   }

}