user1979117 user1979117 -4 years ago 77
Java Question

Sound in java - Game freezes when playing sound

Whenever I play a sound in my game, the thread freezes then continues after the sound has finished playing. Code for the sound engine:

package com.kgt.platformer;

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.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;

public class Sound {
private final static int BUFFER_SIZE = 12800000;
private static File soundFile;
private static AudioInputStream audioStream;
private static AudioFormat audioFormat;
private static SourceDataLine sourceLine;

/**
*
* @param filename the name of the file that is going to be played
*
*/
public static void playSound(String filename){

String strFilename = filename;

try {
soundFile = new File(strFilename);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}

try {
audioStream = AudioSystem.getAudioInputStream(soundFile);
} catch (Exception e){
e.printStackTrace();
System.exit(1);
}

audioFormat = audioStream.getFormat();

DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat);
try {
sourceLine = (SourceDataLine) AudioSystem.getLine(info);
sourceLine.open(audioFormat);
} catch (LineUnavailableException e) {
e.printStackTrace();
System.exit(1);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}


sourceLine.start();

int nBytesRead = 0;
byte[] abData = new byte[BUFFER_SIZE];
while (nBytesRead != -1) {
try {
nBytesRead = audioStream.read(abData, 0, abData.length);
} catch (IOException e) {
e.printStackTrace();
}
if (nBytesRead >= 0) {
@SuppressWarnings("unused")
int nBytesWritten = sourceLine.write(abData, 0, nBytesRead);
}
}

sourceLine.drain();
sourceLine.close();
}
}


What ends up happening is I start the game, it plays sound, the games freezes then continues.

Answer Source

You could start a thread to handle the reading and writing of the streams. Take a look here: How can I play sound in Java?

Example code:

new Thread(new Runnable() {
  public void run() {
    Sound.playSound("Test.wav");
  }
}.start();
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