/// <summary>
/// Add set of harmonic features to calculation list
/// </summary>
/// <param name="featureList"></param>
/// <param name="peakCount"></param>
/// <param name="pitchEstimator"></param>
/// <param name="lowPitch"></param>
/// <param name="highPitch"></param>
public void IncludeHarmonicFeatures(string featureList,
int peakCount = 10,
Func <float[], float> pitchEstimator = null,
Action <float[], int[], float[], int, float> peaksDetector = null,
float lowPitch = 80,
float highPitch = 400)
{
if (featureList == "all" || featureList == "full")
{
featureList = HarmonicSet;
}
var features = featureList.Split(',', '+', '-', ';', ':')
.Select(f => f.Trim().ToLower());
_harmonicExtractors = features.Select <string, Func <float[], int[], float[], float> >(feature =>
{
switch (feature)
{
case "hc":
case "hcentroid":
return(Harmonic.Centroid);
case "hs":
case "hspread":
return(Harmonic.Spread);
case "inh":
case "inharmonicity":
return(Harmonic.Inharmonicity);
case "oer":
case "oddevenratio":
return((spectrum, peaks, freqs) => Harmonic.OddToEvenRatio(spectrum, peaks));
case "t1":
case "t2":
case "t3":
return((spectrum, peaks, freqs) => Harmonic.Tristimulus(spectrum, peaks, int.Parse(feature.Substring(1))));
default:
return((spectrum, peaks, freqs) => 0);
}
}).ToList();
FeatureDescriptions.AddRange(features);
if (pitchEstimator == null)
{
_pitchEstimator = spectrum => Pitch.FromSpectralPeaks(spectrum, SamplingRate, lowPitch, highPitch);
}
else
{
_pitchEstimator = pitchEstimator;
}
if (peaksDetector == null)
{
_peaksDetector = Harmonic.Peaks;
}
else
{
_peaksDetector = peaksDetector;
}
_peaks = new int[peakCount];
_peakFrequencies = new float[peakCount];
}