87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
|
/* fft/gsl_fft_halfcomplex.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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 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 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_HALFCOMPLEX_H__
|
||
|
|
#define __GSL_FFT_HALFCOMPLEX_H__
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include <gsl/gsl_math.h>
|
||
|
|
#include <gsl/gsl_complex.h>
|
||
|
|
#include <gsl/gsl_fft.h>
|
||
|
|
#include <gsl/gsl_fft_real.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
|
||
|
|
|
||
|
|
int gsl_fft_halfcomplex_radix2_backward (double data[], const size_t stride, const size_t n);
|
||
|
|
int gsl_fft_halfcomplex_radix2_inverse (double data[], const size_t stride, const size_t n);
|
||
|
|
int gsl_fft_halfcomplex_radix2_transform (double data[], const size_t stride, const size_t n);
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
size_t n;
|
||
|
|
size_t nf;
|
||
|
|
size_t factor[64];
|
||
|
|
gsl_complex *twiddle[64];
|
||
|
|
gsl_complex *trig;
|
||
|
|
}
|
||
|
|
gsl_fft_halfcomplex_wavetable;
|
||
|
|
|
||
|
|
gsl_fft_halfcomplex_wavetable * gsl_fft_halfcomplex_wavetable_alloc (size_t n);
|
||
|
|
|
||
|
|
void
|
||
|
|
gsl_fft_halfcomplex_wavetable_free (gsl_fft_halfcomplex_wavetable * wavetable);
|
||
|
|
|
||
|
|
|
||
|
|
int gsl_fft_halfcomplex_backward (double data[], const size_t stride, const size_t n,
|
||
|
|
const gsl_fft_halfcomplex_wavetable * wavetable,
|
||
|
|
gsl_fft_real_workspace * work);
|
||
|
|
|
||
|
|
int gsl_fft_halfcomplex_inverse (double data[], const size_t stride, const size_t n,
|
||
|
|
const gsl_fft_halfcomplex_wavetable * wavetable,
|
||
|
|
gsl_fft_real_workspace * work);
|
||
|
|
|
||
|
|
int gsl_fft_halfcomplex_transform (double data[], const size_t stride, const size_t n,
|
||
|
|
const gsl_fft_halfcomplex_wavetable * wavetable,
|
||
|
|
gsl_fft_real_workspace * work);
|
||
|
|
|
||
|
|
int
|
||
|
|
gsl_fft_halfcomplex_unpack (const double halfcomplex_coefficient[],
|
||
|
|
double complex_coefficient[],
|
||
|
|
const size_t stride, const size_t n);
|
||
|
|
|
||
|
|
int
|
||
|
|
gsl_fft_halfcomplex_radix2_unpack (const double halfcomplex_coefficient[],
|
||
|
|
double complex_coefficient[],
|
||
|
|
const size_t stride, const size_t n);
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif /* __GSL_FFT_HALFCOMPLEX_H__ */
|