internal override void Process(Sample Sample)
{
if (Sample.Silent)
{
return;
}
double minFreq = Sample.MinFreq;
double maxFreq = Sample.MaxFreq;
double sampleRate = Sample.Format.SamplesPerSecond;
double[] spectr = new double[Sample.Spectrogram.Length];
for (int i = 0; i < spectr.Length; i++)
{
spectr[i] = Spectrometer.Abs2(Sample.Spectrogram[i]);
}
int usefullMinSpectr = Math.Max(0,
(int)(minFreq * spectr.Length / sampleRate));
int usefullMaxSpectr = Math.Min(spectr.Length,
(int)(maxFreq * spectr.Length / sampleRate) + 1);
int[] peakIndices = FindPeaks(spectr, usefullMinSpectr, usefullMaxSpectr - usefullMinSpectr,
PeaksCount);
if (Array.IndexOf(peakIndices, usefullMinSpectr) >= 0)
{
Sample.FundamentalFreq = 0;
return;
}
const int verifyFragmentOffset = 0;
int verifyFragmentLength = (int)(sampleRate / minFreq);
double minPeakValue = Double.PositiveInfinity;
int minPeakIndex = 0;
int minOptimalInterval = 0;
for (int i = 0; i < peakIndices.Length; i++)
{
int index = peakIndices[i];
int binIntervalStart = spectr.Length / (index + 1);
int binIntervalEnd = spectr.Length / index;
int interval;
double peakValue;
ScanSignalIntervals(Sample.EqualizedData, verifyFragmentOffset, verifyFragmentLength,
binIntervalStart, binIntervalEnd, out interval, out peakValue);
if (peakValue < minPeakValue)
{
minPeakValue = peakValue;
minPeakIndex = index;
minOptimalInterval = interval;
}
}
Sample.FundamentalFreq = (double)sampleRate / minOptimalInterval;
}
public SoundProcessor(UpdateMuscialSymbolDelegate UpdateMuscialSymbolDelegate, Settings settings)
{
Preprocessor = new Preprocessor();
Splitter = new KvantSound.Splitter(OnSplittedSamples);
Equalizer = new KvantSound.Equalizer();
Normalizer = new KvantSound.Normalizer();
Spectrometer = new KvantSound.Spectrometer();
PitchDetector = new PitchDetector();
this.UpdateMuscialSymbolDelegate = UpdateMuscialSymbolDelegate;
this.settings = settings ?? new Settings();
ApplySettings();
}
internal override void Process(Sample Sample)
{
double[] Spectr = new double[Sample.Spectrogram.Length];
for (int i = 0; i < Spectr.Length; i++)
{
Spectr[i] = Spectrometer.Abs2(Sample.Spectrogram[i]);
}
double[][] DownSamples = new double[DownSamplesCount][];
for (int i = 0; i < DownSamplesCount; i++)
{
int DownSampleLength = Spectr.Length / (i + 2);
double Ratio = (double)DownSampleLength / Spectr.Length;
DownSamples[i] = new double[DownSampleLength];
for (int j = 0; j < Spectr.Length; j++)
{
DownSamples[i][(int)(j * Ratio)] += Spectr[j];
}
for (int j = 0; j < DownSamples[i].Length; j++)
{
DownSamples[i][j] *= Ratio;
}
}
double[] SampleMult = new double[DownSamples[DownSamplesCount - 1].Length];
double Max = 0;
int IndOfMax = 0;
for (int i = 0; i < SampleMult.Length; i++)
{
SampleMult[i] = Spectr[i];
for (int j = 0; j < DownSamplesCount; j++)
{
SampleMult[i] *= DownSamples[j][i];
}
if (Max < SampleMult[i])
{
Max = SampleMult[i];
IndOfMax = i;
}
}
Sample.FundamentalFreq = (double)IndOfMax / Spectr.Length * Sample.Format.SamplesPerSecond;
}