public double[] apply(double[] input_signal)
{
tfr = stft.forward(input_signal);
tfr.applyTempoChange((double)Pt / (double)Qt * (double)Qp / (double)Pp, false, this.robotoFX, ref fi, ref dfi); /* Tempo change step */
double[] output_signal = stft.inverse(tfr);
/* Pitch shift step. Apply function resample(Qp, Pp) on output_signal to change its sample rate by a factor Qp/Pp (multiplied by) */
output_signal = resampler.Resample(output_signal);
return(output_signal);
}
/* For real-time usage, ensure that the output blocks are continuous */
public double[] applyContinuous(double[] input_signal, int Pt, int Qt, int Pp, int Qp, bool robotoFX)
{
List <double[]> frame = prepFrame(input_signal, prev_input_signal);
for (int frameNum = 0; frameNum < frame.Count; frameNum++)
{
tfr = stft.forward(frame[frameNum]);
tfr.applyTempoChange((double)Pt / (double)Qt * (double)Qp / (double)Pp, true, robotoFX, ref fi, ref dfi); /* Tempo change step */
if (input_signal == null)
{
frame[frameNum] = stft.inverse(tfr, ref prev_output_signal, true);
}
else
{
frame[frameNum] = stft.inverse(tfr, ref prev_output_signal, false);
}
}
/* Combine blocks to produce single output block */
double[] output_signal;
if (frame.Count == 1)
{
if (input_signal == null)
{
output_signal = bondFrames(frame, FRAMETYPE.START);
}
else
{
output_signal = bondFrames(frame, FRAMETYPE.END);
}
}
else
{
output_signal = bondFrames(frame, FRAMETYPE.MID);
}
if (input_signal != null)
{
prev_input_signal = new double[input_signal.Length];
for (int sample = 0; sample < input_signal.Length; sample++)
{
prev_input_signal[sample] = input_signal[sample];
}
}
/* Pitch shift step. Apply OUTPUT-BLOCK-CONTINUOUS function resampleContinuous(Qp, Pp) on output_signal to change its sample rate by a factor Qp/Pp (multiplied by) */
output_signal = resampler.ResampleContinuous(output_signal);
return(output_signal);
}