/**
* Constructor, sets the {@link Decoder}, the sample window size and the
* hop size for the spectra returned. Say the sample window size is 1024
* samples. To get an overlapp of 50% you specify a hop size of 512 samples,
* for 25% overlap you specify a hopsize of 256 and so on. Hop sizes are of
* course not limited to powers of 2.
*
* @param decoder The decoder to get the samples from.
* @param sampleWindowSize The sample window size.
* @param hopSize The hop size.
* @param useHamming Wheter to use hamming smoothing or not.
*/
public SpectrumProvider( DecoderInterface decoder, int sampleWindowSize, int hopSize, bool useHamming )
{
if( decoder == null )
throw new ArgumentException( "Decoder must be != null" );
if( sampleWindowSize <= 0 )
throw new ArgumentException( "Sample window size must be > 0" );
if( hopSize <= 0 )
throw new ArgumentException( "Hop size must be > 0" );
if( sampleWindowSize < hopSize )
throw new ArgumentException( "Hop size must be <= sampleSize" );
this.sampleWindowSize = sampleWindowSize;
this.decoder = decoder;
this.samples = new float[sampleWindowSize];
this.nextSamples = new float[sampleWindowSize];
this.tempSamples = new float[sampleWindowSize];
this.hopSize = hopSize;
fft = new FFT( sampleWindowSize, AudioManager.frequency );
if( useHamming )
fft.window(FFT.HAMMING);
decoder.readSamples( ref samples );
decoder.readSamples( ref nextSamples );
}
