public void AddSample(float sample)
{
SampleProcessed++;
if (Samples.Count < FFTLength)
{
Enqueue(sample);
}
else
{
Enqueue(sample);
CurrentGap++;
if (CurrentGap < SampleGap && SampleProcessed != SampleCount)
{
return;
}
CurrentGap = 0;
if (Samples.Count == FFTLength)
{
Complex[] fft = new Complex[FFTLength];
int i = 0;
foreach (var s in Samples)
{
fft[i].X = (float)(s * FastFourierTransform.HammingWindow(i, FFTLength));
fft[i].Y = 0;
i++;
}
FastFourierTransform.FFT(true, m, fft);
SampleAnalysis[] result = new SampleAnalysis[FFTLength];
for (int n = 0; n < fft.Length; n++)
{
result[n].Frequency = Physics.GetFrequency(n, AudioReader.WaveFormat.SampleRate, FFTLength);
result[n].Amplitude = Physics.GetAmplitude(fft[n]);
}
Processed?.Invoke(result);
}
}
}
private void OnSample(object sender, SampleEventArgs e)
{
FFTBuffer[FFTPosition].X = (float)(e.Right * FastFourierTransform.HammingWindow(FFTPosition, FFTLength)); // e.Right ? seems equal to e.Left in this case (mono?)
FFTBuffer[FFTPosition].Y = 0;
FFTPosition++;
if (FFTPosition >= FFTBuffer.Length)
{
FastFourierTransform.FFT(true, (int)Math.Log(FFTLength, 2.0), FFTBuffer);
FFTPosition = 0;
SampleAnalysis[] result = new SampleAnalysis[FFTLength];
for (int n = 0; n < FFTBuffer.Length; n++)
{
result[n].Frequency = Physics.GetFrequency(n, AudioReader.WaveFormat.SampleRate, FFTLength);
result[n].Amplitude = Physics.GetAmplitude(FFTBuffer[n]);
}
Processed?.Invoke(result);
}
}