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System.NullReferenceException on Raspberry PI - how to debug? #45

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@sandreas

Hey there,

I tried SharpAudio on Raspberry PI and got an Exception. I already installed openal:

ldconfig -p | grep openal
	libopenal.so.1 (libc6,hard-float) => /lib/arm-linux-gnueabihf/libopenal.so.1

I think, that SharpAudio might fail to load the library for some reason, but unfortunately I have no idea how to debug this...

  • The wav file exists
  • openal is installed
  • libopenal.so.1 exists

Here is the code I used:

var soundFile = "testing.wav";
if (!File.Exists(soundFile))
{
    Console.WriteLine(soundFile + " does not exist");
}
else
{
	var engine = AudioEngine.CreateDefault();
	var soundStream = new SoundStream(File.OpenRead(soundFile), engine);
	soundStream.Play();

	var timer = new Stopwatch();
	timer.Start();
	while (soundStream.IsPlaying && timer.ElapsedMilliseconds < 5000)
	{
		Thread.Sleep(50);
	}
	soundStream.Stop();
}

And the exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at SharpAudio.BufferChain..ctor(AudioEngine engine)
   at SharpAudio.Codec.SoundSink..ctor(AudioEngine audioEngine, Submixer submixer, ISoundSinkReceiver receiver)
   at SharpAudio.Codec.SoundStream..ctor(Stream stream, AudioEngine engine, Submixer mixer)
   at App.Run(String deviceNode)

Could you please help me out again? :-) Thank you

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