private void PitchShiftTDv(short[] datain, out short[] dataout)
{
var length = datain.Length;
var fratio = FormantShiftRate;
var newlen = (int)Math.Round(length / fratio);
var temp = new double[newlen];
for (var i = 0; i < Math.Min(newlen, length); i++)
{
temp[i] = datain[i];
}
var tempout = Stretch(temp, fratio, length);
if (overlap == null)
{
overlap = new Overlap(kOverlapCount, length / kOverlapCount);
}
SetPrePostWindow(length);
for (var i = 0; i < length; i++)
{
tempout[i] *= window[i];
}
overlap.AddOverlap(ref tempout);
dataout = ToShort(tempout, length);
}
public void Process(short[] datain, out short[] dataout)
{
var length = datain.Length;
var mBitRev = FHTArrays.GetBitRevTable(length);
var mPreWindow = FHTArrays.GetPreWindow(length);
var mPostWindow = FHTArrays.GetPostWindow(length);
var hopanal = length / kOverlapCount;
var hopsyn = (int)(hopanal * ShiftRate);
var overlapCount = (int)Math.Ceiling((double)length / hopsyn);
var temp = new double[length];
if (shiftChanged || mLastPhase == null || mLastPhase.Length != length / 2)
{
mLastPhase = new double[length / 2];
mSumPhase = new double[length / 2];
overlap = new Overlap(overlapCount, hopsyn);
shiftChanged = false;
}
for (var i = 0; i < length; ++i)
{
var j = mBitRev[i];
var k = (uint)(j & (length - 1));
temp[i] = datain[k] * mPreWindow[k];
}
double[] re, im;
fht.ComputeFHT(temp, out re, out im);
var temp_shift = new double[length];
AnalysisAndSynthesis(ref re, ref im);
ifht.ComputeFHT(re, im, out temp_shift, false);
temp = temp_shift;
var window = FHTArrays.GetPostWindow(length);
if (overlapCount >= kOverlapCount)
{
for (var i = 0; i < length; i++)
{
temp_shift[i] *= window[i] * shiftRate / 2;
}
}
overlap.AddOverlap(ref temp_shift);
temp = new double[hopsyn];
Array.Copy(temp_shift, temp, hopsyn);
temp = Stretch(temp, 1 / ShiftRate, length);
dataout = ToShort(temp, length);
}
