PlaySoundAction.java

package edu.stanford.hci.r3.actions.types;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;

import javax.media.*;

import com.sun.media.codec.audio.mp3.JavaDecoder;

import edu.stanford.hci.r3.actions.R3Action;

public class PlaySoundAction implements R3Action {

        private List<PlaySoundListener> notifyOnStop = new ArrayList<PlaySoundListener>();

        public static interface PlaySoundListener {
                public void soundStopped();
        }

        public void addStopListener(PlaySoundListener psl) {
                notifyOnStop.add(psl);
        }

        static {
                // register the MP3 plugin for JMF.
                JavaDecoder.main(new String[] {});
                System.out.println("Disregard the InvocationTargetException. "
                                + "It is printed out by the JavaDecoder while registering the mp3 plugin.");
        }

        private Player player;

        private File sound;

        public PlaySoundAction(File soundFile) {
                sound = soundFile;
        }

        public void invoke() {
                // play it!
                try {
                        player = Manager.createRealizedPlayer(sound.toURI().toURL());
                        player.addControllerListener(new ControllerListener() {
                                public void controllerUpdate(ControllerEvent ce) {
                                        if (ce instanceof StopEvent) {
                                                StopEvent se = (StopEvent) ce;
                                                System.out.println("PlaySoundAction Stopped at: "
                                                                + se.getMediaTime().getSeconds() + " seconds");
                                                stop();
                                                for (PlaySoundListener psl : notifyOnStop) {
                                                        psl.soundStopped();
                                                }
                                        }
                                }
                        });
                        player.start();
                } catch (NoPlayerException e) {
                        e.printStackTrace();
                } catch (CannotRealizeException e) {
                        e.printStackTrace();
                } catch (MalformedURLException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        public void pause() {
                player.stop();
        }

        public void stop() {
                player.stop();
                player.close();
        }

        public void unpause() {
                player.start();
        }
}

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