AcoustID.Audio.LomontFFTService.ComputeTable C# (CSharp) Метод

        public void ComputeTable(int size)
        {
            forwardCos = new double[size];
            forwardSin = new double[size];

            // forward pass
            int i = 0;
            int n = size;
            int mmax = 1;
            while (n > mmax)
            {
                int istep = 2 * mmax;
                double theta = Math.PI / mmax;
                double wr = 1, wi = 0;
                double wpr = Math.Cos(theta);
                double wpi = Math.Sin(theta);
                for (int m = 0; m < istep; m += 2)
                {
                    forwardCos[i] = wr;
                    forwardSin[i] = wi;
                    i++;

                    double t = wr;
                    wr = wr * wpr - wi * wpi;
                    wi = wi * wpr + t * wpi;
                }
                mmax = istep;
            }
        }