/// <summary>
/// Method to calculate DFT on wave window
/// </summary>
private void calculateDFT()
{
Complex[][] DFT = new Complex[wave.channels][];
double[] samples = new double[fourierN];
for (int i = 0; i < samples.Length; i++)
{
samples[i] = 0;
}
int startIndex = Math.Max(timeSelStart, 0);
int N = Math.Min(wave.getNumSamples() - startIndex, fourierN);
Array.Copy(wave.samples[0], startIndex, samples, 0, N);
if (sampleWindowing == WINDOWING.triangle)
{
Formulas.WindowTriangle(ref samples);
}
else if (sampleWindowing == WINDOWING.cosine)
{
Formulas.WindowCosine(ref samples);
}
else if (sampleWindowing == WINDOWING.blackman)
{
Formulas.WindowBlackman(ref samples);
}
DFT[0] = Formulas.DFT(ref samples);
frequencyDomain.SampleRate = wave.sampleRate;
frequencyDomain.Fourier = DFT;
frequencyDomain.Invalidate();
}
