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45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015, Mike Walters <mike@flomp.net>
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*
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* This file is part of inspectrum.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fft.h"
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#include "string.h"
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FFT::FFT(int size)
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{
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fftSize = size;
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fftwIn = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize);
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fftwOut = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize);
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fftwPlan = fftwf_plan_dft_1d(fftSize, fftwIn, fftwOut, FFTW_FORWARD, FFTW_MEASURE);
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}
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FFT::~FFT()
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{
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if (fftwPlan) fftwf_destroy_plan(fftwPlan);
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if (fftwIn) fftwf_free(fftwIn);
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if (fftwOut) fftwf_free(fftwOut);
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}
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void FFT::process(void *dest, void *source)
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{
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memcpy(fftwIn, source, fftSize * sizeof(fftwf_complex));
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fftwf_execute(fftwPlan);
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memcpy(dest, fftwOut, fftSize * sizeof(fftwf_complex));
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}
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