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git-svn-id: svn://db.shs.com.ru/pip@326 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5

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Бычков Андрей
2017-03-31 15:58:45 +00:00
parent 30aaec60a8
commit d79392ecf3
2 changed files with 71 additions and 0 deletions
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60
src/math/pifft.h
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@@ -121,4 +121,64 @@ typedef PIFFT_double PIFFT;
typedef PIFFT_double PIFFTd;
typedef PIFFT_float PIFFTf;
// fftw3 realisation
#ifdef PIP_FFTW
#include <complex.h>
#include "fftw3.h"
template <typename T>
class PIP_EXPORT PIFFTW
{
public:
const PIVector<complex<T> > & calcFFT(const PIVector<complex<T> > &in) {
result.resize(in.size());
p = fftw_plan_dft_1d(in.size_s(), (fftw_complex *)in.data(), (fftw_complex *)result.data(), FFTW_FORWARD, FFTW_ESTIMATE);
fftw_execute(p);
fftw_destroy_plan(p);
return result;
}
const PIVector<complex<T> > & calcFFT(const PIVector<T> &in) {
result.resize(in.size());
p = fftw_plan_dft_r2c_1d(in.size_s(), (double *)in.data(), (fftw_complex *)result.data(), FFTW_ESTIMATE);
fftw_execute(p);
fftw_destroy_plan(p);
return result;
}
const PIVector<complex<T> > & calcFFTinverse(const PIVector<complex<T> > &in) {
result.resize(in.size());
p = fftw_plan_dft_1d(in.size_s(), (fftw_complex *)in.data(), (fftw_complex *)result.data(), FFTW_BACKWARD, FFTW_ESTIMATE);
fftw_execute(p);
fftw_destroy_plan(p);
return result;
}
enum FFT_Operation {fo_real, fo_complex, fo_inverse};
void preparePlan(int size, FFT_Operation op) {
PIVector<complex<T> > in(size), out(size);
PIVector<T> inr(size);
switch (op) {
case fo_real:
p = fftw_plan_dft_r2c_1d(in.size_s(), (double *)inr.data(), (fftw_complex *)out.data(), FFTW_MEASURE);
break;
case fo_complex:
p = fftw_plan_dft_1d(in.size_s(), (fftw_complex *)in.data(), (fftw_complex *)out.data(), FFTW_FORWARD, FFTW_MEASURE);
break;
case fo_inverse:
p = fftw_plan_dft_1d(in.size_s(), (fftw_complex *)in.data(), (fftw_complex *)out.data(), FFTW_BACKWARD, FFTW_MEASURE);
break;
}
}
private:
PIVector<complex<T> > result;
fftw_plan p;
};
typedef PIFFTW<double> PIFFTWd;
#endif // PIP_FFTW
#endif // PIFFT_H