private void Process2(int start, int end)
{
//Сдвиг окна (shift 500 - width 512)
int shift = 256;
int width = 1024;
//Диапазон частот (256 - до 22100Hz, 128 - до 11050Hz)
int freq_range = 256;
double[] func = FFTHelper.WindowFunc(SelectedWindowFunc, width);
Bitmap btm = new Bitmap((end - start) / shift, 256);
System.Drawing.Color[] freq = new System.Drawing.Color[freq_range];
int btm_i = 0;
FFTLine.Points.Clear();
double[] result = new double[width];
for (int x = 0; x < SelectedData.Count() - width; x += shift)
{
int i = 0;
int ii = 0;
if (x + width < SelectedData.Count() - 1)
{
FFT2Helper.fft(SelectedData.GetRange(x, width).ToArray()).ToList().ForEach(p =>
{
p = p.Magnitude * func[ii];
int Db = (int)(GetYPosLog(p) + 5) * 8;
int intense1 = Db <= 0 ? 0 : Db;
intense1 = intense1 > 255 ? 255 : intense1;
// intense1 = Math.Abs(intense1 - 255) ;
if (i < freq.Count())
{
freq[i] = System.Drawing.Color.FromArgb(255, intense1, intense1, 50);
}
i++;
ii++;
});
for (int yi = freq.Count() - 1; yi > 0; yi--)
{
btm.SetPixel(btm_i, yi, freq[Math.Abs(yi - (freq.Count() - 1))]);
}
}
btm_i++;
}
Spectrogramm = BitmapToImage(btm);
//for (int i = 0; i < 2048; i++)
//{
// temp[i].Magnitude = (temp[i].Magnitude / 2048);
// // temp[i].Magnitude = temp[i].Rep > cons ? (temp[i].Magnitude / temp[i].Rep) : 0;
// FFTLine.Points.Add(new DataPoint(i, temp[i].Magnitude));
//}
//FFTModel.InvalidatePlot(true);
}
