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Diffstat (limited to 'btl/libs/FFTW/fftw_interface.hh')
| -rw-r--r-- | btl/libs/FFTW/fftw_interface.hh | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/btl/libs/FFTW/fftw_interface.hh b/btl/libs/FFTW/fftw_interface.hh new file mode 100644 index 0000000..81701e7 --- /dev/null +++ b/btl/libs/FFTW/fftw_interface.hh @@ -0,0 +1,87 @@ +//===================================================== +// Copyright (C) 2011 Andrea Arteaga <andyspiros@gmail.com> +//===================================================== +// +// 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 2 +// 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, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +#ifndef BTL_FFTW_INTERFACE_H +#define BTL_FFTW_INTERFACE_H + +#include <complex> +#include <fftw3.h> +#include <vector> + +class fftw_interface +{ +public: + + static inline std::string name() + { + return std::string("fftw"); + } + + typedef std::complex<double> real_type; + typedef std::vector<std::complex<double> > stl_vector; + + typedef fftw_complex* gene_vector; + + typedef fftw_plan plan; + + static inline void free_vector(gene_vector & B){ + fftw_free(B); + } + + static inline void vector_from_stl(gene_vector & B, stl_vector & B_stl){ + int N = B_stl.size(); + B = (gene_vector) fftw_malloc(sizeof(fftw_complex) * N); + std::complex<double>* B_cplx = reinterpret_cast<std::complex<double>* >(B); + + for (int i=0;i<N;i++) + B_cplx[i] = B_stl[i]; + } + + static inline void vector_to_stl(gene_vector & B, stl_vector & B_stl){ + int N = B_stl.size(); + std::complex<double>* B_cplx = reinterpret_cast<std::complex<double>* >(B); + for (int i=0;i<N;i++) + B_stl[i] = B_cplx[i]; + } + + static inline void copy_vector(const gene_vector & source, gene_vector & cible, int N){ + for (int i=0;i<N;i++) { + cible[i][0]=source[i][0]; + cible[i][1]=source[i][1]; + } + } + + /* Begin FFTW operations */ + + static inline void fftw_init_plan(plan & p, const int & N, gene_vector & x, gene_vector & y, const int & sign, const int & flags){ + p = fftw_plan_dft_1d(N, x, y, sign, flags); + } + + static inline void fftw_init_plan_2d(plan & p, const int & N, gene_vector & x, gene_vector& y, const int & sign, const int & flags){ + p = fftw_plan_dft_2d(N, N, x, y, sign, flags); + } + + static inline void fftw_init_plan_3d(plan & p, const int & N, gene_vector & x, gene_vector& y, const int & sign, const int & flags){ + p = fftw_plan_dft_3d(N, N, N, x, y, sign, flags); + } + + static inline void fftw_run(plan & p){ + fftw_execute(p); + } +}; + +#endif // BTL_FFTW_INTERFACE_H |