/// <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);
 }
Example #2
0
        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);
 }