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/*
* Copyright (C) 2015, Mike Walters <mike@flomp.net>
*
* This file is part of inspectrum.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "fft.h"
#include "string.h"
FFT::FFT(int size)
{
fftSize = size;
fftwIn = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize);
fftwOut = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize);
fftwPlan = fftwf_plan_dft_1d(fftSize, fftwIn, fftwOut, FFTW_FORWARD, FFTW_MEASURE);
}
FFT::~FFT()
{
if (fftwPlan) fftwf_destroy_plan(fftwPlan);
if (fftwIn) fftwf_free(fftwIn);
if (fftwOut) fftwf_free(fftwOut);
}
void FFT::process(void *dest, void *source)
{
memcpy(fftwIn, source, fftSize * sizeof(fftwf_complex));
fftwf_execute(fftwPlan);
memcpy(dest, fftwOut, fftSize * sizeof(fftwf_complex));
}