/*
 * @(#) WebCam.java
 * 
 * COMP 150-TUI
 * Michael Horn (michael.horn@tufts.edu)
 * Tufts University, Department of Computer Science
 */
import java.awt.Image;
import java.awt.event.*;
import javax.swing.Timer;

import javax.media.*;
import javax.media.format.*;
import javax.media.util.BufferToImage;
import javax.media.control.FormatControl;
import javax.media.control.FrameGrabbingControl;

public class WebCam implements ActionListener {

   public static final String DEVICE =
   "vfw:Microsoft WDM Image Capture (Win32):0";

   protected Timer timer;
   protected Player player;
   protected Scanner scanner;
   protected FrameGrabbingControl fgc;


   public WebCam() throws Exception {

      CaptureDeviceInfo cdi = CaptureDeviceManager.getDevice(DEVICE);

      this.timer = new Timer(500, this);
      this.player = Manager.createRealizedPlayer(cdi.getLocator());
      this.fgc = (FrameGrabbingControl)player.getControl(
         "javax.media.control.FrameGrabbingControl");
         
      //-------------------------------------
      // Change to 640x480 format
      //-------------------------------------
      //FormatControl fc = (FormatControl)
      //player.getControl("javax.media.control.FormatControl");
      //Format[] formats = fc.getSupportedFormats();
      //fc.setFormat(formats[4]);
   }

   public void start() {
      this.player.start();
      this.timer.start();
   }

   public void stop() {
      this.timer.stop();
      this.player.stop();
   }

   public void close() {
      this.player.close();
      this.player.deallocate();
   }

   public void actionPerformed(ActionEvent e) {
      if (e.getSource() == timer) {

         //----------------------------------
         // Grab a frame 
         //----------------------------------
         Buffer buf = fgc.grabFrame();

         
         //----------------------------------
         // Convert it to an image
         //----------------------------------
         BufferToImage btoi = new BufferToImage(
            (VideoFormat)buf.getFormat());
         Image img = btoi.createImage(buf);

         
         //----------------------------------
         // Process image here...
         //----------------------------------
      }
   }
}