| /* fft/gsl_fft.h |
| * |
| * Copyright (C) 1996, 1997, 1998, 1999, 2000 Brian Gough |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __GSL_FFT_H__ |
| #define __GSL_FFT_H__ |
| |
| #include <gsl/gsl_complex.h> |
| |
| #undef __BEGIN_DECLS |
| #undef __END_DECLS |
| #ifdef __cplusplus |
| # define __BEGIN_DECLS extern "C" { |
| # define __END_DECLS } |
| #else |
| # define __BEGIN_DECLS /* empty */ |
| # define __END_DECLS /* empty */ |
| #endif |
| |
| __BEGIN_DECLS |
| |
| #ifndef GSL_DISABLE_DEPRECATED |
| typedef enum |
| { |
| forward = -1, backward = +1, |
| gsl_fft_forward = -1, gsl_fft_backward = +1 |
| } |
| gsl_fft_direction; |
| #else |
| typedef enum |
| { |
| gsl_fft_forward = -1, gsl_fft_backward = +1 |
| } |
| gsl_fft_direction; |
| #endif |
| |
| /* this gives the sign in the formula |
| |
| h(f) = \sum x(t) exp(+/- 2 pi i f t) |
| |
| where - is the forward transform direction and + the inverse direction */ |
| |
| __END_DECLS |
| |
| #endif /* __GSL_FFT_H__ */ |
