/* wavelet/gsl_wavelet.h

 * 

 * Copyright (C) 2004 Ivo Alxneit

 * 

 * 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_WAVELET_H__

#define __GSL_WAVELET_H__

#include <stdlib.h>

#include <gsl/gsl_types.h>

#include <gsl/gsl_errno.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

typedef enum {

  gsl_wavelet_forward = 1, gsl_wavelet_backward = -1

} 

gsl_wavelet_direction;

typedef struct

{

  const char *name;

  int (*init) (const double **h1, const double **g1,

               const double **h2, const double **g2, size_t * nc,

               size_t * offset, size_t member);

}

gsl_wavelet_type;

typedef struct

{

  const gsl_wavelet_type *type;

  const double *h1;

  const double *g1;

  const double *h2;

  const double *g2;

  size_t nc;

  size_t offset;

}

gsl_wavelet;

typedef struct

{

  double *scratch;

  size_t n;

}

gsl_wavelet_workspace;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_daubechies;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_daubechies_centered;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_haar;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_haar_centered;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_bspline;

GSL_VAR const gsl_wavelet_type *gsl_wavelet_bspline_centered;

gsl_wavelet *gsl_wavelet_alloc (const gsl_wavelet_type * T, size_t k);

void gsl_wavelet_free (gsl_wavelet * w);

const char *gsl_wavelet_name (const gsl_wavelet * w);

gsl_wavelet_workspace *gsl_wavelet_workspace_alloc (size_t n);

void gsl_wavelet_workspace_free (gsl_wavelet_workspace * work);

int gsl_wavelet_transform (const gsl_wavelet * w, 

                           double *data, size_t stride, size_t n,

                           gsl_wavelet_direction dir, 

                           gsl_wavelet_workspace * work);

int gsl_wavelet_transform_forward (const gsl_wavelet * w, 

                                   double *data, size_t stride, size_t n, 

                                   gsl_wavelet_workspace * work);

int gsl_wavelet_transform_inverse (const gsl_wavelet * w, 

                                    double *data, size_t stride, size_t n, 

                                    gsl_wavelet_workspace * work);

__END_DECLS

#endif /* __GSL_WAVELET_H__ */