mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-30 03:38:55 -05:00
111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
|
|
// //
|
|
// 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 as 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 V3 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 <QElapsedTimer>
|
|
#include "dsp/fftwengine.h"
|
|
|
|
FFTWEngine::FFTWEngine(const QString& fftWisdomFileName) :
|
|
m_fftWisdomFileName(fftWisdomFileName),
|
|
m_plans(),
|
|
m_currentPlan(nullptr),
|
|
m_reuse(true)
|
|
{
|
|
}
|
|
|
|
FFTWEngine::~FFTWEngine()
|
|
{
|
|
freeAll();
|
|
}
|
|
|
|
void FFTWEngine::configure(int n, bool inverse)
|
|
{
|
|
if (m_reuse)
|
|
{
|
|
for (Plans::const_iterator it = m_plans.begin(); it != m_plans.end(); ++it)
|
|
{
|
|
if (((*it)->n == n) && ((*it)->inverse == inverse))
|
|
{
|
|
m_currentPlan = *it;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
m_currentPlan = new Plan;
|
|
m_currentPlan->n = n;
|
|
m_currentPlan->inverse = inverse;
|
|
m_currentPlan->in = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * n);
|
|
m_currentPlan->out = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * n);
|
|
QElapsedTimer t;
|
|
t.start();
|
|
m_globalPlanMutex.lock();
|
|
|
|
if (m_fftWisdomFileName.size() > 0)
|
|
{
|
|
int rc = fftwf_import_wisdom_from_filename(m_fftWisdomFileName.toStdString().c_str());
|
|
|
|
if (rc == 0) { // that's an error (undocumented)
|
|
qInfo("FFTWEngine::configure: importing from FFTW wisdom file: '%s' failed", qPrintable(m_fftWisdomFileName));
|
|
} else {
|
|
qDebug("FFTWEngine::configure: successfully imported from FFTW wisdom file: '%s'", qPrintable(m_fftWisdomFileName));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
qDebug("FFTWEngine::configure: no FFTW wisdom file");
|
|
}
|
|
|
|
m_currentPlan->plan = fftwf_plan_dft_1d(n, m_currentPlan->in, m_currentPlan->out, inverse ? FFTW_BACKWARD : FFTW_FORWARD, FFTW_PATIENT);
|
|
m_globalPlanMutex.unlock();
|
|
|
|
qDebug("FFT: creating FFTW plan (n=%d,%s) took %lld ms", n, inverse ? "inverse" : "forward", t.elapsed());
|
|
m_plans.push_back(m_currentPlan);
|
|
}
|
|
|
|
void FFTWEngine::transform()
|
|
{
|
|
if(m_currentPlan != NULL)
|
|
fftwf_execute(m_currentPlan->plan);
|
|
}
|
|
|
|
Complex* FFTWEngine::in()
|
|
{
|
|
if(m_currentPlan != NULL)
|
|
return reinterpret_cast<Complex*>(m_currentPlan->in);
|
|
else return NULL;
|
|
}
|
|
|
|
Complex* FFTWEngine::out()
|
|
{
|
|
if(m_currentPlan != NULL)
|
|
return reinterpret_cast<Complex*>(m_currentPlan->out);
|
|
else return NULL;
|
|
}
|
|
|
|
QMutex FFTWEngine::m_globalPlanMutex;
|
|
|
|
void FFTWEngine::freeAll()
|
|
{
|
|
for(Plans::iterator it = m_plans.begin(); it != m_plans.end(); ++it) {
|
|
fftwf_destroy_plan((*it)->plan);
|
|
fftwf_free((*it)->in);
|
|
fftwf_free((*it)->out);
|
|
delete *it;
|
|
}
|
|
m_plans.clear();
|
|
}
|