static void onDrawSpectrogram(Surface2D Canvas, float phase, App app)
{
int hz = app?.Stream?.Hz ?? 0;
Complex[][] Model = null;
// app?.Stream?.Peek(out Model);
int cc = Model?.Length ?? 0;
cc = Math.Max(
cc,
Canvas.Width);
Canvas.Fill(Canvas._bgColor);
double FREQmax = double.MinValue,
FREQmin = double.MaxValue;
Canvas.Plot((it, i) => {
if (it == null)
{
return(null);
}
// Frequency[] z = Process.Translate(it, hz);
Frequency[] z = null;
Pixel2D?[] Yaxis = new Pixel2D?[z.Length];
for (int j = 0; j < z.Length; j++)
{
double vol = z[j].Vol * Math.E;
if (vol > 0)
{
FREQmax = Math.Max(FREQmax, z[j].Freq);
FREQmin = Math.Min(FREQmin, z[j].Freq);
}
if (vol > Math.E)
{
Color color = Color.White;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol >= 1)
{
Color color = Color.Red;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol >= 0.75)
{
Color color = Color.Yellow;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol > 0.5)
{
Color color = Color.YellowGreen;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol > 0.25)
{
Color color = Color.Green;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol > 0.1)
{
Color color = Color.DarkGreen;
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol > 0.05)
{
Color color = Color.FromArgb(30, 30, 30);
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
else if (vol > 0)
{
Color color = Color.FromArgb(10, 10, 10);
Yaxis[j] = new Pixel2D(
(j / (double)z.Length),
Surface2D.ChangeColorBrightness(color,
(float)(0)));
}
}
return(Yaxis);
}, Model, cc);
Canvas.BottomLeft = FREQmax.ToString() + "Hz";
Canvas.TopLeft = FREQmin.ToString() + "Hz";
}