67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/*******************************************************************************
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* Copyright 2015-2016 Juan Francisco Crespo Galán
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#include "util/FFTPlan.h"
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AUD_NAMESPACE_BEGIN
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FFTPlan::FFTPlan(double measureTime) :
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FFTPlan(DEFAULT_N, measureTime)
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{
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}
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FFTPlan::FFTPlan(int n, double measureTime) :
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m_N(n), m_bufferSize(((n/2)+1)*2*sizeof(fftwf_complex))
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{
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fftwf_set_timelimit(measureTime);
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void* buf = fftwf_malloc(m_bufferSize);
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m_fftPlanR2C = fftwf_plan_dft_r2c_1d(m_N, (float*)buf, (fftwf_complex*)buf, FFTW_EXHAUSTIVE);
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m_fftPlanC2R = fftwf_plan_dft_c2r_1d(m_N, (fftwf_complex*)buf, (float*)buf, FFTW_EXHAUSTIVE);
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fftwf_free(buf);
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}
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FFTPlan::~FFTPlan()
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{
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fftwf_destroy_plan(m_fftPlanC2R);
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fftwf_destroy_plan(m_fftPlanR2C);
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}
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int FFTPlan::getSize()
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{
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return m_N;
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}
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void FFTPlan::FFT(void* buffer)
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{
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fftwf_execute_dft_r2c(m_fftPlanR2C, (float*)buffer, (fftwf_complex*)buffer);
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}
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void FFTPlan::IFFT(void* buffer)
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{
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fftwf_execute_dft_c2r(m_fftPlanC2R, (fftwf_complex*)buffer, (float*)buffer);
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}
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void* FFTPlan::getBuffer()
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{
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return fftwf_malloc(m_bufferSize);
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}
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void FFTPlan::freeBuffer(void* buffer)
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{
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fftwf_free(buffer);
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}
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AUD_NAMESPACE_END
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