LWJGL Forum
Programming => OpenAL => Topic started by: penguin on March 22, 2011, 16:42:41
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Hello,
Today i've started to do some things with OpenAL and i want to load a Wave-File, but if i try to load one with the WaveData Class (org.lwjgl.util.WaveData) the returned WaveData Object is a NullPointer.
Here's my code:
package com.iceengine.audio.sound;
/**
*
* @author penguin
*/
import org.lwjgl.util.WaveData;
import org.lwjgl.openal.AL10;
import org.lwjgl.openal.AL;
import java.nio.IntBuffer;
import org.lwjgl.BufferUtils;
public class WaveSound implements Sound {
private WaveData myData;
private IntBuffer alBuffer = BufferUtils.createIntBuffer(1);
private IntBuffer alSource = BufferUtils.createIntBuffer(1);
public void setListener(float[] Position, float[] Velocity, float[] Orientation)
{
AL10.alListener3f(AL10.AL_POSITION, Position[0], Position[1], Position[2]);
AL10.alListener3f(AL10.AL_VELOCITY, Velocity[0], Velocity[1], Velocity[2]);
AL10.alListener3f(AL10.AL_ORIENTATION, Orientation[0], Orientation[1], Orientation[2]);
}
public void loadSound(String Path)
{
myData = WaveData.create(Path);
AL10.alGenBuffers(alBuffer);
System.out.println(alBuffer + " " + myData);
System.out.println(alBuffer + " " + myData.format + " " + myData.data + " " + myData.samplerate);
AL10.alBufferData(alBuffer.get(0), myData.format, myData.data, myData.samplerate);
myData.dispose();
}
public void genSources(float[] sourcePos, float[] sourceVelocity)
{
AL10.alGenSources(alSource);
AL10.alSourcei(alSource.get(0), AL10.AL_BUFFER, alBuffer.get(0));
AL10.alSourcef(alSource.get(0), AL10.AL_PITCH, 1.0f);
AL10.alSourcef(alSource.get(0), AL10.AL_GAIN, 1.0f);
AL10.alSource3f(alSource.get(0), AL10.AL_POSITION, sourcePos[0], sourcePos[1], sourcePos[2]);
AL10.alSource3f(alSource.get(0), AL10.AL_VELOCITY, sourceVelocity[0], sourceVelocity[1], sourceVelocity[2]);
}
public void killSource()
{
AL10.alDeleteBuffers(alBuffer.get(0));
AL10.alDeleteSources(alSource.get(0));
}
public void init()
{
try {
AL.create();
} catch (Exception e)
{
}
}
public void startPlay()
{
AL10.alSourcePlay(alSource.get(0));
}
public void stopPlay()
{
AL10.alSourcePause(alSource.get(0));
}
public void haltPlay()
{
AL10.alSourceStop(alSource.get(0));
}
}
Here's the code how i use my class:
WaveSound mySound = new WaveSound();
mySound.init();
float[] tmp = {0.0f, 0.0f, 0.0f};
mySound.setListener(tmp, tmp, tmp);
mySound.loadSound("hell.wav"); // hell.wav exists in Project folder, also tried with absolute path, but don't work.
mySound.genSources(tmp, tmp);
mySound.startPlay();
I hope someone can help me and, btw sorry for my bad english (I'm German).
Regards,
Penguin
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That usually just means that its not finding the sound files, try putting your sound files in a jar file and adding it to the classpath.
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Sorry for late answer, i was very busy.
This works, but is there no other choice to play the Soundfile?
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import java.io.FileInputStream;
//...
FileInputStream fin = null;
WaveData waveFile = null;
try {
fin = new FileInputStream("MyFile.wav");
waveFile = WaveData.create(fin);
} catch (java.io.FileNotFoundException ex) {
ex.printStackTrace();
}
finally {
if(fin != null) {
try{ fin.close(); }catch(java.io.IOException ex){}
}
}
LWJGL Tutorials (http://www.lwjgl.org/wiki/index.php)
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Sorry, to dig this out, but I just had a similiar problem when trying to load a wav from the file system and doubt that the example code is wrong. Whatever I tried, I always just got a null pointer exception after trying to load the data. Actually when loading it from a file system and the target file does not exist, the FileNotFoundException will be raised already. However, the file was found, but I still got just a null back. After going down a little bit into the code, I noticed, that it is using an own logger that was actually preventing to show the real problem. I am actually not sure, if it is a got idea to wrap an exception into a hidden logger, but... After adding
System.setProperty("org.lwjgl.util.Debug", "true");i see the following message:
"Unable to create from inputstream, mark/reset not supported"
This actually gave me the right hint. I think that it is completely right as FileInputStream should not support mark/reset, so I wrapped it into a BufferedStream:
wavefile = WaveData.create(new BufferedInputStream(fin));And suddenly the sound is loaded correctly. However, I am not an expert with streams and maybe someone can validate, if the current listing for loading sound files from the filesystem is correct. Else there might be a lot of newcomers having problems to just play a sound.
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Thanks, I had the exact same problem.
I would like to use the WaveData.create(String path) but it seems to have some bugs because it loads the wave in eclipse but it wont load it when I pack my project to jar and run it in windows (is debug mode the reason ? you might wanna check that guys). And my jar project was working in windows properly except the sounds. So this is what I use now and it works good.
WaveData wavefile = WaveData.create(new BufferedInputStream(new FileInputStream(path)));
// btw: Thanks for the bug fix in 2.8.2 with the exit crash!
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n4pgamer :
That's interesting. I'm having the same issue. If I use your example
WaveData wavefile = WaveData.create(new BufferedInputStream(new FileInputStream(path)));
That works if my asset path is outside my Jar file. However, I'd love to be able to package my assets (sounds and images) inside the jar.
I was trying to get my sound file this way and it works great in Eclipse, but as n4pgamer mentioned, it breaks when packaged.
ClassLoader load = this.getClass().getClassLoader();
WaveData waveFile = WaveData.create(load.getResourceAsStream("assets/scene_01/sounds/spacebackground.wav"));
That works great for other types of files. For example, this code works great for getting image files from the jar
ClassLoader load = this.getClass().getClassLoader();
URL url = load.getResource(fileName);
image = ImageIO.read(url);
Has anyone found a way to get sound files into WaveData when the sound files are packaged in the Jar?
Thank you
Greg
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I think I found it
ClassLoader load = this.getClass().getClassLoader();
String path = "assets/scene_01/sounds/spacebackground.wav";
URL url = load.getResource(path);
WaveData waveFile = WaveData.create(url);
That seems to work with the asset directory in the jar file
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wavefile = WaveData.create(new BufferedInputStream(fin));
Thanks alot!
I was unable to load the file from my jar. It worked in Eclipse. Simply wrapping a BufferedInputStream around the FileInputStream fixed the loading problem of sound files.
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wrapping it in a bufferedInputstream didnt work for me.. but loading it into a ByteArrayInputStream and then doing .create did work.
wonder if the size of the file had an impact?