/// <summary>
/// perform inverse fft
/// </summary>
/// <param name="data">data from perform_fft</param>
/// <returns>restored data</returns>
public static double[] perform_ifft(Complex[] data)
{
int len = (data.Length - 1) * 2;
double[] temp_re = new double[data.Length];
double[] temp_im = new double[data.Length];
double[] output = new double[len];
for (int i = 0; i < data.Length; i++)
{
temp_re[i] = data[i].Real;
temp_im[i] = data[i].Imaginary;
}
int res = DataHandlerLibrary.perform_ifft(temp_re, temp_im, len, output);
if (res != (int)CustomExitCodes.STATUS_OK)
{
throw new BrainFlowException(res);
}
return(output);
}
