1 /* Resampling library

     2  * Copyright (C) <2001> David Schleef <ds@schleef.org>

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public

    15  * License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 

    21 #ifndef __FUNCTABLE_H__

    22 #define __FUNCTABLE_H__

    23 

    24 typedef void FunctableFunc (double *fx, double *dfx, double x, void *closure);

    25 

    26 typedef struct _Functable Functable;

    27 struct _Functable {

    28   int length;

    29 

    30   double offset;

    31   double multiplier;

    32 

    33   double inv_multiplier;

    34 

    35   double *fx;

    36   double *dfx;

    37 };

    38 #ifdef __SYMBIAN32__

    39 IMPORT_C

    40 #endif

    41 

    42 

    43 Functable *functable_new (void);

    44 void functable_setup (Functable *t);

    45 #ifdef __SYMBIAN32__

    46 IMPORT_C

    47 #endif

    48 

    49 void functable_free (Functable *t);

    50 #ifdef __SYMBIAN32__

    51 IMPORT_C

    52 #endif

    53 

    54 

    55 void functable_set_length (Functable *t, int length);

    56 #ifdef __SYMBIAN32__

    57 IMPORT_C

    58 #endif

    59 

    60 void functable_set_offset (Functable *t, double offset);

    61 #ifdef __SYMBIAN32__

    62 IMPORT_C

    63 #endif

    64 

    65 void functable_set_multiplier (Functable *t, double multiplier);

    66 #ifdef __SYMBIAN32__

    67 IMPORT_C

    68 #endif

    69 

    70 void functable_calculate (Functable *t, FunctableFunc func, void *closure);

    71 #ifdef __SYMBIAN32__

    72 IMPORT_C

    73 #endif

    74 

    75 void functable_calculate_multiply (Functable *t, FunctableFunc func, void *closure);

    76 #ifdef __SYMBIAN32__

    77 IMPORT_C

    78 #endif

    79 

    80 

    81 

    82 double functable_evaluate (Functable *t,double x);

    83 #ifdef __SYMBIAN32__

    84 IMPORT_C

    85 #endif

    86 

    87 

    88 double functable_fir(Functable *t,double x0,int n,double *data,int len);

    89 #ifdef __SYMBIAN32__

    90 IMPORT_C

    91 #endif

    92 

    93 void functable_fir2(Functable *t,double *r0, double *r1, double x0,

    94         int n,double *data,int len);

    95 #ifdef __SYMBIAN32__

    96 IMPORT_C

    97 #endif

    98 

    99 

   100 void functable_func_sinc(double *fx, double *dfx, double x, void *closure);

   101 #ifdef __SYMBIAN32__

   102 IMPORT_C

   103 #endif

   104 

   105 void functable_func_boxcar(double *fx, double *dfx, double x, void *closure);

   106 #ifdef __SYMBIAN32__

   107 IMPORT_C

   108 #endif

   109 

   110 void functable_func_hanning(double *fx, double *dfx, double x, void *closure);

   111 

   112 #endif /* __PRIVATE_H__ */

   113