Re: Play audio clip in an Application

chump wrote:
I've been able to play an audio clip with the code below. Only problem
now is the thread won't die and the app stays running.

Does the thread need to be set as Deamon?

import java.io.File;
import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

/**
* This class provides simple functions for playing sounds
*
* @author ryan
*/
public class SoundPlayer implements LineListener, Runnable
{
private File soundFile;

private Thread thread;

private static SoundPlayer player;

/**
* Private because of the singleton
*/
private SoundPlayer()
{
}

/**
* Play a siren sound
*/
public static void playSiren()
{
SoundPlayer p = getPlayer();
p.playSirenFile();
}

/**
* Play the siren file
*/
private void playSirenFile()
{
this.soundFile = new File("./audio/threeHorn.wav");
thread = new Thread(this);
thread.setName("SoundPlayer");
thread.start();
}

/**
* Invoked when the thread kicks off
*/
public void run()
{
try
{
AudioInputStream stream = AudioSystem
.getAudioInputStream(this.soundFile);
AudioFormat format = stream.getFormat();

/**
* we can't yet open the device for ALAW/ULAW playback, convert
* ALAW/ULAW to PCM
*/
if ((format.getEncoding() == AudioFormat.Encoding.ULAW)
|| (format.getEncoding() == AudioFormat.Encoding.ALAW))
{
AudioFormat tmp = new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
format.getSampleSizeInBits() * 2, format.getChannels(),
format.getFrameSize() * 2, format.getFrameRate(), true);
stream = AudioSystem.getAudioInputStream(tmp, stream);
format = tmp;
}
DataLine.Info info = new DataLine.Info(Clip.class, stream
.getFormat(), ((int) stream.getFrameLength() * format
.getFrameSize()));

Clip clip = (Clip) AudioSystem.getLine(info);
clip.addLineListener(this);
clip.open(stream);
clip.start();
try
{
thread.sleep(99);
}
catch (Exception e)
{
}
while (clip.isActive() && thread != null)
{
try
{
thread.sleep(99);
}
catch (Exception e)
{
break;
}
}
clip.stop();
clip.close();
}
catch (UnsupportedAudioFileException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (LineUnavailableException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}

private static SoundPlayer getPlayer()
{
if (player == null)
{
player = new SoundPlayer();
}
return player;
}

public void update(LineEvent event)
{
}

public static void main(String[] args)
{
SoundPlayer.playSiren();
}
}


Here is how to play a Clip. But what was wrong with using AudioClip?

import java.io.*;
import javax.sound.sampled.*;

public class PlayClip {
public static void main(String[] args) {
try {
AudioInputStream ais =
AudioSystem.getAudioInputStream(new File(args[0]));
AudioFormat af = ais.getFormat();
Clip line = AudioSystem.getClip();
line.open(ais);
line.start();
line.drain();
line.stop();
line.close();
} catch (Exception e) {
System.out.println(e);
}
}
}

--

Knute Johnson
email s/nospam/knute/
.

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