80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
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/* fft/gsl_fft_real_float.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __GSL_FFT_REAL_FLOAT_H__
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#define __GSL_FFT_REAL_FLOAT_H__
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#include <stddef.h>
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#include <gsl/gsl_math.h>
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#include <gsl/gsl_complex.h>
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#include <gsl/gsl_fft.h>
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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__BEGIN_DECLS
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int gsl_fft_real_float_radix2_transform (float data[], const size_t stride, const size_t n) ;
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typedef struct
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{
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size_t n;
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size_t nf;
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size_t factor[64];
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gsl_complex_float *twiddle[64];
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gsl_complex_float *trig;
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}
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gsl_fft_real_wavetable_float;
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typedef struct
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{
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size_t n;
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float *scratch;
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}
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gsl_fft_real_workspace_float;
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gsl_fft_real_wavetable_float * gsl_fft_real_wavetable_float_alloc (size_t n);
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void gsl_fft_real_wavetable_float_free (gsl_fft_real_wavetable_float * wavetable);
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gsl_fft_real_workspace_float * gsl_fft_real_workspace_float_alloc (size_t n);
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void gsl_fft_real_workspace_float_free (gsl_fft_real_workspace_float * workspace);
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int gsl_fft_real_float_transform (float data[], const size_t stride, const size_t n,
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const gsl_fft_real_wavetable_float * wavetable,
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gsl_fft_real_workspace_float * work);
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int gsl_fft_real_float_unpack (const float real_float_coefficient[],
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float complex_coefficient[],
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const size_t stride, const size_t n);
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__END_DECLS
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#endif /* __GSL_FFT_REAL_FLOAT_H__ */
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