// Use the low-level CuFFTW API to perform an inverse transform.
static void DoInversePlan(CuFFTWAPI api, Complex[] input, out Complex[] output)
{
output = new Complex[input.Length];
var inversePlan = api.fftw_plan_dft_1d(
input.Length,
input,
output,
FFTW_BACKWARD,
FFTW_ESTIMATE);
api.fftw_execute(inversePlan);
api.fftw_destroy_plan(inversePlan);
// Scale the output to obtain the inverse.
for (var i = 0; i < output.Length; i++)
{
output[i] /= output.Length;
}
Console.WriteLine("Inverse Values:");
for (var i = 0; i < output.Length; i++)
{
Console.WriteLine($" [{i}] = {output[i].Real}");
}
}
/// <summary>
/// Constructs a new CuFFTW instance.
/// </summary>
public CuFFTW(CuFFTWAPIVersion?version)
{
API = CuFFTWAPI.Create(version);
}