public static void onDrawMic(Surface2D Canvas, float phase, ISource wav)
{
int hz = wav?.Hz ?? 0;
var fft = wav?.Peek();
int samples = wav != null ?
fft.Length
: 0;
double h = samples != 0
? hz / (double)samples
: 0;
var duration = hz != 0
? Math.Round((double)samples / hz, 4)
: 0;
Canvas.TopLeft = $"{samples} @ {hz}Hz = {duration}s, {h}Hz";
Canvas.TopRight = $"{phase:N4}s";
Canvas.Fill(Color.Black);
if (fft == null)
{
return;
}
var X = Complex.InverseFFT(fft);
Canvas.Line((x, width) => Color.Green, (x, width) => {
int i = Surface2D.linear(x, width, X.Length);
return(SigF.f(X[i]) + 0.07);
});
Canvas.Line((x, width) => Color.FromArgb(173, 216, 230), (x, width) => {
int i = Surface2D.linear(x, width, samples / 7);
return(+(SigF.f(2 * fft[i].Magnitude) - 0.5));
}, true);
for (int s = 0; s < samples; s++)
{
fft[s].Scale(0.5f);
}
X = Complex.InverseFFT(fft);
Canvas.Line((x, width) => Color.White, (x, width) => {
int i = Surface2D.linear(x, width, samples / 7);
return(-(SigF.f(2 * fft[i].Magnitude) - 0.5));
}, true);
Canvas.Line((x, width) => Color.OrangeRed, (x, width) => {
int i = Surface2D.linear(x, width, X.Length);
return(SigF.f(X[i]) + 0.07);
});
Canvas.Line((x, width) => Color.DarkOrange, (x, width) => {
int i = Surface2D.linear(x, width, X.Length);
return(SigF.f(X[i]) - 1.07);
});
}