processeffectlauncher.java

能够检测到人脸

package visage_v3_2;

/*Autor: Adel Restom [e-mail]*/

import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.format.*;
import javax.swing.*;
import javax.media.protocol.*;
import java.awt.*;

/*
  This class adds the 'ProcessEffect' effect to the video stream after instantiating a processor.
  ALL THE CODE WRITTEN HERE IS TAKEN FROM SUN'S 'RotationEffect' CODE SAMPLE, SLIGHT MODIFICATIONS WHERE MADE.
*/

public class ProcessEffectLauncher implements ControllerListener {

  Processor processor;
  Object waitSync = new Object();
  boolean stateTransitionOK = true;

  public ProcessEffectLauncher()
  {}

  public Processor open(DataSource ds,CaptureDeviceInfo cdi, Frame frame)
  {
    try //Instantiate a processor
    {
      processor = Manager.createProcessor(ds);
    }
    catch (Exception e)
    {
      JOptionPane.showMessageDialog(frame,"Failed to create a processor",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    processor.addControllerListener(this);

    //Put the Processor into configured state.
    processor.configure();
    if (!waitForState(processor.Configured))
    {
      JOptionPane.showMessageDialog(frame,"Failed to configure the processor",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    //So We can use it as a player.
    processor.setContentDescriptor(null);

    //Obtain the track controls.
    TrackControl tc[] = processor.getTrackControls();

    if (tc == null)
    {
      JOptionPane.showMessageDialog(frame,"Failed to obtain track controls from the processor",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    //Search for the track control for the video track.
    TrackControl videoTrack = null;
    for (int i = 0; i < tc.length; i++)
    {
      if (tc[i].getFormat() instanceof VideoFormat)
      {
        {
          videoTrack = tc[i];
          break;
        }
      }
    }

    if (videoTrack == null)
    {
      JOptionPane.showMessageDialog(frame,"The input media does not contain a video track",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    //Instantiate and set the frame access codec to the data flow path.
    try
    { //If the video stream is flipped, flip it back to the normal state ( my code )

      String format = videoTrack.getFormat().toString();
      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
      double width = screenSize.getWidth();
      double height = screenSize.getHeight();
      if( format.endsWith(", Flipped") )
      {
        Codec codec[] = { /*new HorizontalFlip(cdi),*/ new ProcessEffect(cdi,frame.model,frame,(int)(width/2d),(int)(height/2d))};
        frame.xScale = width / 80d;
        frame.yScale = height / 60d;
        SpinnerModel xModel = new SpinnerNumberModel(frame.xScale, 1, frame.xScale*2, 0.5);
        frame.xSpinner.setModel(xModel);
        SpinnerModel yModel = new SpinnerNumberModel(frame.yScale, 1, frame.yScale*2, 0.5);
        frame.ySpinner.setModel(yModel);
        videoTrack.setCodecChain(codec);
      }
      else //If not flipped, add only the 'ProcessEffect' effect
      {
        Codec codec[] = { /*new HorizontalFlip(cdi),*/new ProcessEffect(cdi,frame.model,frame,(int)(width/2d),(int)(height/2d))};
        frame.xScale = width / 80d;
        frame.yScale = height / 60d;
        SpinnerModel xModel = new SpinnerNumberModel(frame.xScale, 1, frame.xScale*2, 0.1);
        frame.xSpinner.setModel(xModel);
        SpinnerModel yModel = new SpinnerNumberModel(frame.yScale, 1, frame.yScale*2, 0.1);
        frame.ySpinner.setModel(yModel);
        videoTrack.setCodecChain(codec);
      }
    }
    catch (UnsupportedPlugInException e)
    {
      JOptionPane.showMessageDialog(frame,"The processor does not support effects",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    //Realize the processor.
    processor.prefetch();
    if (!waitForState(processor.Prefetched))
    {
      JOptionPane.showMessageDialog(frame,"Failed to realize the processor",null,JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }

    //Start the processor.
    processor.start();

    return processor;
  }

  /**
   * Block until the processor has transitioned to the given state.
   * Return false if the transition failed.
   */
  boolean waitForState(int state)
  {
    synchronized (waitSync)
    {
      try
      {
        while (processor.getState() != state && stateTransitionOK)
          waitSync.wait();
      }
      catch (Exception e) {}
    }
    return stateTransitionOK;
  }

  /**
   * Controller Listener.
   */
  public void controllerUpdate(ControllerEvent evt)
  {

    if (evt instanceof ConfigureCompleteEvent || evt instanceof RealizeCompleteEvent || evt instanceof PrefetchCompleteEvent) {
      synchronized (waitSync)
      {
        stateTransitionOK = true;
        waitSync.notifyAll();
      }
    }
    else if (evt instanceof ResourceUnavailableEvent)
    {
      synchronized (waitSync)
      {
        stateTransitionOK = false;
        waitSync.notifyAll();
      }
    }
    else if (evt instanceof EndOfMediaEvent)
    {
      processor.close();
      System.exit(0);
    }
  }

}