/// <summary>
/// Takes the input array and shortens it to the correct value by passing it through a window function.
/// </summary>
/// <param name="input">The input array that is oversized.</param>
/// <param name="reqLength">The required length of the input array.</param>
/// <param name="type">The type of window you would like to apply.</param>
/// <returns>The output array which is properly sized.</returns>
public static double[] ApplyWindowFunction(float[] input, int reqLength, WindowType type)
{
WindowFunction function = new WindowFunction(type);
double[] temp = new double[input.Length];
for (int i = 0; i < temp.Length; i++) temp[i] = (double)input[i];
return function.ApplyWindowFunction(temp, reqLength);
}
public static double[,] FFTW(double[] y, double samplerate, WindowFunction.WindowType window)
{
double[] w = new double[y.Length];
for (int i = 0; i < w.Length; i++) w[i] = 1;
w = WindowFunction.ApplyWindowFunction(w, w.Length, window);
double mean = Mean(w) / 2 * y.Length;
y = WindowFunction.ApplyWindowFunction(y, y.Length, window);
var fft = FFTW(y, samplerate, 1);
for (int i = 0; i < fft.Length / 2; i++)
fft[1, i] /= mean;
return fft;
}
/// <summary>
/// Takes the input array and shortens it to the correct value by passing it through a window function.
/// </summary>
/// <param name="input">The input array that is oversized.</param>
/// <param name="reqLength">The required length of the input array.</param>
/// <param name="type">The type of window you would like to apply.</param>
/// <returns>The output array which is properly sized.</returns>
public static double[] ApplyWindowFunction(double[] input, int reqLength, WindowType type)
{
WindowFunction function = new WindowFunction(type);
return function.ApplyWindowFunction(input, reqLength);
}