# File fft_fftw.cxx¶

FFT routines using external libraries.

Copyright 2010 B.D.Dudson, S.Farley, M.V.Umansky, X.Q.Xu

Contact: Ben Dudson, bd512@york.ac.uk

This file is part of BOUT++.

BOUT++ is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

BOUT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with BOUT++. If not, see http://www.gnu.org/licenses/.

namespace bout

SNB model

namespace fft

Functions

void rfft(MAYBE_UNUSED(const BoutReal *in), MAYBE_UNUSED(int length), MAYBE_UNUSED(dcomplex *out))
void irfft(MAYBE_UNUSED(const dcomplex *in), MAYBE_UNUSED(int length), MAYBE_UNUSED(BoutReal *out))
void DST(MAYBE_UNUSED(const BoutReal *in), MAYBE_UNUSED(int length), MAYBE_UNUSED(dcomplex *out))
void DST_rev(MAYBE_UNUSED(dcomplex *in), MAYBE_UNUSED(int length), MAYBE_UNUSED(BoutReal *out))

Variables

bool fft_initialised = {false}

Have we set fft_measure?

bool fft_measure = {false}

Should FFTW find an optimised plan by measuring various plans?