Hi,
I get a exception when I'm trying to initialize J3d.Sound. I haven't found any examples or tutorials. This is the exception thrown after a call to System.out.println("Channels used for sound : " + s.getNumberOfChannelsUsed()) :
java.lang.NullPointerException at javax.media.j3d.SoundRetained.getNumberOfChannelsUsed(SoundRetained.java:779) at javax.media.j3d.Sound.getNumberOfChannelsUsed(Sound.java:845) at montageHansatome.createSceneGraph(montageHansatome.java:140) at montageHansatome.init(montageHansatome.java:68) at sun.applet.AppletPanel.run(Unknown Source) at java.lang.Thread.run(Unknown Source)
This is my code :
PhysicalEnvironment pe = simpleU.getViewer().getPhysicalEnvironment();
AudioEngine ae = new AudioEngine(pe);
pe.setAudioDevice(ae);
if (ae.initialize())
System.out.println("audio initialized");
else
System.out.println("audio not initialized");
System.out.println("Nb channels available : " + ae.getChannelsAvailable());
System.out.println("PlaybackType : " + ae.getAudioPlaybackType());
MediaContainer mediaContainer = new MediaContainer(getCodeBase() + "/test.wav");
Sound s = new BackgroundSound(mediaContainer, 1.0f);
s.setLoop(100);
s.setSchedulingBounds(bounds);
System.out.println("Channels used for sound : " + s.getNumberOfChannelsUsed());
s.setEnable(true);
if (s.isReady())
System.out.println("ready");
else
System.out.println("not ready");
objRoot.addChild(s);
If I commentthe line System.out.println("Channels used for sound : " + s.getNumberOfChannelsUsed()), I get another exception and the screen is black :
java.lang.ClassCastException: com.sun.j3d.audioengines.AudioEngine
at javax.media.j3d.SoundScheduler.checkAudioDevice3D(SoundScheduler.java:2566)
at javax.media.j3d.SoundScheduler.attachSoundData(SoundScheduler.java:2612)
at javax.media.j3d.SoundScheduler.processSoundAtom(SoundScheduler.java:1285)
at javax.media.j3d.SoundScheduler.calcSchedulingAction(SoundScheduler.java:1577)
at javax.media.j3d.SoundScheduler.renderChanges(SoundScheduler.java:787)
at javax.media.j3d.SoundScheduler.processMessages(SoundScheduler.java:229)
at javax.media.j3d.StructureUpdateThread.doWork(StructureUpdateThread.java:83)
at javax.media.j3d.J3dThread.run(J3dThread.java:256)
Thanks for your help
Matthieu Beghin
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