protected void drawPlots(double[] a1, double[] a2, double[] a3, double[] a4)
{
if (sPlotDir == null)
{
return;
}
ConstructionUtil.plotArray(a1, sPlotDir + "\\data1.js", -1, true);
ConstructionUtil.plotArray(a2, sPlotDir + "\\data3.js", -1, false);
ConstructionUtil.plotArray(a3, sPlotDir + "\\data2.js", -1, true);
ConstructionUtil.plotArray(a4, sPlotDir + "\\data4.js", -1, false);
}
public WaveAudio doModify(WaveAudio src, int bufsize)
{
WaveAudio wout = new WaveAudio(src.getSampleRate(), 1);
wout.LengthInSamples = src.LengthInSamples;
//reuse the buffers.
double[] ffreqmaghalfout = new double[bufsize / 2], ffreqanghalfout = new double[bufsize / 2];
double[] ffreqmaghalfin = new double[bufsize / 2], ffreqanghalfin = new double[bufsize / 2];
double[] fbuffertime = new double[bufsize];
for (int index = 0; index < src.LengthInSamples - bufsize; index += bufsize / overlap)
{
//copy into buffer.
Array.Copy(src.data[0], index, fbuffertime, 0, bufsize);
double[] ffreqreal, ffreqimag;
Fourier.RawSamplesToFrequency(fbuffertime, out ffreqreal, out ffreqimag);
//we only care about the first half of these results.
for (int i = 0; i < bufsize / 2; i++)
{
ffreqmaghalfin[i] = Math.Sqrt(ffreqreal[i] * ffreqreal[i] + ffreqimag[i] * ffreqimag[i]);
ffreqanghalfin[i] = Math.Atan2(ffreqimag[i], ffreqreal[i]);
}
this.modifyAngular(ffreqmaghalfin, ffreqanghalfin, ffreqmaghalfout, ffreqanghalfout);
for (int i = 0; i < ffreqreal.Length / 2; i++)
{
ffreqreal[i] = ffreqmaghalfout[i] * Math.Sin(ffreqanghalfout[i]);
ffreqimag[i] = ffreqmaghalfout[i] * Math.Cos(ffreqanghalfout[i]);
}
for (int i = ffreqreal.Length / 2; i < ffreqreal.Length; i++)
{
ffreqreal[i] = ffreqimag[i] = 0;
}
double[] fbufout;
Fourier.RawFrequencyToSamples(out fbufout, ffreqreal, ffreqimag);
WaveAudio ww = new WaveAudio(44100, 1);
ww.data[0] = fbufout;
//Array.Copy(fbufout, 0, wout.data[0], partnum*bufsize, bufsize);
ConstructionUtil.placeAudioRamp(wout, ww, index, (bufsize / overlapRamp));
}
return(wout);
}