protected boolean decodeFrame() throws JavaLayerException
	{		
		try
		{
			AudioDevice out = audio;
			if (out==null)
				return false;

			Header h = bitstream.readFrame();	
			
			if (h==null)
				return false;
				
			// sample buffer set when decoder constructed
			SampleBuffer output = (SampleBuffer)decoder.decodeFrame(h, bitstream);
																																					
			synchronized (this)
			{
				out = audio;
				if (out!=null)
				{					
					out.write(output.getBuffer(), 0, output.getBufferLength());
				}				
			}
																			
			bitstream.closeFrame();
		}		
		catch (RuntimeException ex)
		{
			throw new JavaLayerException("Exception decoding audio frame", ex);
		}
/*
		catch (IOException ex)
		{
			System.out.println("exception decoding audio frame: "+ex);
			return false;	
		}
		catch (BitstreamException bitex)
		{
			System.out.println("exception decoding audio frame: "+bitex);
			return false;	
		}
		catch (DecoderException decex)
		{
			System.out.println("exception decoding audio frame: "+decex);
			return false;				
		}
*/		
		return true;
	}