OpenAL hates me.... why do I hear just silence ??

[nomore]

Hi there,

the OpenAL C-testing programs are all working fine. Now, I'm using the java binding but I hear absolutly nothing.

Here's the code:

package de.bytelords.thor;

import java.nio.*;
import de.bytelords.thor.util.Buffer;
import org.lwjgl.openal.AL;

/**
 * @author nomore
 *
 * To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
public class Sample implements SoundFile {
	
	IntBuffer soundBuffer;
	IntBuffer soundSource;
	
	public Sample(String file)
	{
		int lastError = 0;
		
		soundBuffer = Buffer.createIntBuffer(1);
		soundSource = Buffer.createIntBuffer(1);
		
		AL.alGenBuffers(1,soundBuffer);
		if((lastError = AL.alGetError()) != AL.AL_NO_ERROR)
		{
			System.out.println(AL.alGetString(lastError));
			return;
		}
				
		AL.alGenSources(1,soundSource);
		if((lastError = AL.alGetError()) != AL.AL_NO_ERROR)
		{
			System.out.println(AL.alGetString(lastError));
			return;
		}
				
		load(file);
	}
	
	public boolean load(String file)
	{
		int lastError = 0;
		
		de.bytelords.thor.util.WaveData wavefile = de.bytelords.thor.util.WaveData.create(file);

		AL.alBufferData(soundBuffer.get(0), wavefile.format, wavefile.data, wavefile.data.capacity(), wavefile.samplerate);
		if((lastError = AL.alGetError() )!= AL.AL_NO_ERROR)
		{
			System.out.println(AL.alGetString(lastError));
			return false;
		}
		
		AL.alSourcei(soundSource.get(0), AL.AL_BUFFER, soundBuffer.get(0));
		if((lastError = AL.alGetError()) != AL.AL_NO_ERROR)
		{
			System.out.println(AL.alGetString(lastError));
			return false;
		}

		wavefile.dispose();
		return true;
	}

	public void play(boolean loop)
	{
		int lastError = 0;
		
		AL.alSourcei(soundSource.get(0),AL.AL_LOOPING, AL.AL_FALSE);
		if((lastError = AL.alGetError()) != AL.AL_NO_ERROR)
		{
				System.out.println(AL.alGetString(lastError));
				return;
		}
				
		AL.alSourcef(soundSource.get(0),AL.AL_PITCH,1);
		AL.alSourcePlay(soundSource.get(0));
		if((lastError = AL.alGetError()) != AL.AL_NO_ERROR)
		{
				System.out.println(AL.alGetString(lastError));
				return;
		}
	}
	
	public void release()
	{
		stop();
		AL.alDeleteSources(1,soundSource);
		AL.alDeleteBuffers(1,soundBuffer);
	}
	
	public void stop()
	{
		AL.alSourceStop(soundSource.get());
	}
}

I get no error messages from the code above while running!
Does anyone know an error in the code ?? I've examined the c-samples and I didn't find a real difference. Any help would be really great !

Bye,

Alex

[Matzon]

looks pretty sane to me... try removing pitch. Do the org.lwjgl.test.openal.* tests work fine?

[Matzon]

How did you create OpenAL - default? AL.create(); ?

[nomore]

well... yeah I use the default initialization method AL.create().

I've tried now one of the samples under WinXP and I'm getting this error(the same under linux with the same example)

C:\Entwicklung\lwjgl-pre0.7>java -cp .;lwjgl_test.jar;lwjgl.jar; org.lwjgl.test.
openal.PlayTest c:/test.wav
java.io.IOException: Stream closed
        at java.io.BufferedInputStream.ensureOpen(Unknown Source)
        at java.io.BufferedInputStream.read(Unknown Source)
        at java.io.DataInputStream.readInt(Unknown Source)
        at com.sun.media.sound.WaveFileReader.getFMT(Unknown Source)
        at com.sun.media.sound.WaveFileReader.getAudioInputStream(Unknown Source
)
        at javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)
        at org.lwjgl.test.openal.WaveData.create(Unknown Source)
        at org.lwjgl.test.openal.PlayTest.execute(Unknown Source)
        at org.lwjgl.test.openal.PlayTest.main(Unknown Source)
Exception in thread "main" java.lang.NullPointerException
        at org.lwjgl.test.openal.PlayTest.execute(Unknown Source)
        at org.lwjgl.test.openal.PlayTest.main(Unknown Source)

Any suggestions ?

[Matzon]

yeah, it's not finding the file!

place test.wav in C:\Entwicklung\lwjgl-pre0.7\ and do a:

java -cp .;lwjgl_test.jar;lwjgl.jar; org.lwjgl.test.openal.PlayTest test.wav

ought to work...

[nomore]

hey again,


the samples of openal are working now... didn't know that the wav-files have to be in the classpath....... but my example isn't working

[nomore]

my code works now too.... didn't know that openal plays it's samples in a separate thread... so... releasing the soundfile directly after playing it without a Thread.sleep(5000) for example isn't so great.... :wink:

thanx for your help people !

Bye, Alex

[Matzon]

hehe, yeah - unless you select synchronous context (which doesn't work on win32?) it is all handled by the native threaded implementation of OpenAL.

[princec]

Yes, annoyingly synchronous contexts on Win32 simply lock the application up :/ I had words with the OpenAL devs about this; we should re-open it and get them to implement synchronous mode properly.

Cas