public void RefreshCalculations(int?frameLength = null, int?beStart = null, int?beStop = null)
{
if (frameLength.HasValue)
{
this.FrameLength = frameLength.Value;
}
if (beStart.HasValue)
{
this.BEFrequencyStart = beStart.Value;
}
if (beStop.HasValue)
{
this.BEFrequencyStop = beStop.Value;
}
BEFrequencyStart = Math.Max(BEFrequencyStart, 0);
BEFrequencyStop = Math.Max(BEFrequencyStop, 0);
if (BEFrequencyStop < BEFrequencyStart)
{
(BEFrequencyStart, BEFrequencyStop) = (BEFrequencyStop, BEFrequencyStart);
}
//Eagerly calculate FFT per frame as it's needed in every parameter
fftPerFrame = new float [samples.Length / FrameLength] [];
_ = Parallel.For(0, samples.Length / FrameLength, (i) => fftPerFrame [i] = FastFourierTransform.SelectedFrameFFT(GetSamples(), SampleRate, i, FrameLength, false));
//First batch of tasks - independent from one another
var taskList = new Task <float []> []
{
Volume.Calculate(this),
FrequencyCentroid.Calculate(this),
BandEnergy.Calculate(this),
SpectralFlatnessMeasure.Calculate(this),
SpectralCrestFactor.Calculate(this)
};
Task.WaitAll(taskList);
volume = taskList [0].Result;
frequencyCentroid = taskList [1].Result;
bandEnergy = taskList [2].Result;
spectralFlatnessMeasure = taskList [3].Result;
spectralCrestFactor = taskList [4].Result;
//Second batch - previously calculated parameters are needed here
taskList = new Task <float []> []
{
EffectiveBandwidth.Calculate(this),
BandEnergyRatio.Calculate(this)
};
Task.WaitAll(taskList);
effectiveBandwidth = taskList [0].Result;
bandEnergyRatio = taskList [1].Result;
}
