public SampleAggregator(ISampleProvider source, int fftLength = 1024)
{
channels = source.WaveFormat.Channels;
if (!IsPowerOfTwo(fftLength))
{
throw new ArgumentException("FFT Length must be a power of two");
}
m = (int)Math.Log(fftLength, 2.0);
this.fftLength = fftLength;
fftBuffer = new Complex[fftLength];
fftArgs = new FftEventArgs(fftBuffer);
this.source = source;
}
private void FftCalculated(object sender, FftEventArgs e)
{
var fftResults = e.Result;
if (fftResults.Length / 2 != bins)
{
bins = fftResults.Length / 2;
}
for (int n = 0; n < fftResults.Length / 2; n += binsPerPoint)
{
for (int b = 0; b < binsPerPoint; b++)
{
_db += GetDbLog(fftResults[n + b]);
}
_fre = CalculateFrequency(n / binsPerPoint);
}
}