gstreamer/gst-libs/gst/resample/private.h

/* Resampling library
 * Copyright (C) <2001> David Schleef <ds@schleef.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#ifndef __PRIVATE_H__
#define __PRIVATE_H__

#include "resample.h"

void gst_resample_nearest_s16 (gst_resample_t * r);
void gst_resample_bilinear_s16 (gst_resample_t * r);
void gst_resample_sinc_s16 (gst_resample_t * r);
void gst_resample_sinc_slow_s16 (gst_resample_t * r);
void gst_resample_sinc_ft_s16 (gst_resample_t * r);

void gst_resample_nearest_float (gst_resample_t * r);
void gst_resample_bilinear_float (gst_resample_t * r);
void gst_resample_sinc_float (gst_resample_t * r);
void gst_resample_sinc_slow_float (gst_resample_t * r);
void gst_resample_sinc_ft_float (gst_resample_t * r);


typedef struct functable_s functable_t;
struct functable_s
{
  double start;
  double offset;
  int len;

  double invoffset;

  double scale;
  double scale2;

  double (*func_x) (void *, double x);
  double (*func_dx) (void *, double x);

  double (*func2_x) (void *, double x);
  double (*func2_dx) (void *, double x);

  double *fx;
  double *fdx;

  void *priv;
};

void functable_init (functable_t * t);
double functable_eval (functable_t * t, double x);

double functable_fir (functable_t * t, double x0, int n, double *data, int len);
void functable_fir2 (functable_t * t, double *r0, double *r1, double x0,
    int n, double *data, int len);

double functable_sinc (void *p, double x);
double functable_dsinc (void *p, double x);
double functable_window_std (void *p, double x);
double functable_window_dstd (void *p, double x);
double functable_window_boxcar (void *p, double x);
double functable_window_dboxcar (void *p, double x);

/* math lib stuff */

void conv_double_short_table (double *dest, short *src, int n);
void conv_double_short_unroll (double *dest, short *src, int n);
void conv_double_short_ref (double *dest, short *src, int n);

#ifdef HAVE_CPU_PPC
void conv_double_short_altivec (double *dest, short *src, int n);
#endif

void conv_short_double_ref (short *dest, double *src, int n);

#ifdef HAVE_CPU_PPC
void conv_short_double_ppcasm (short *dest, double *src, int n);
#endif

#ifdef HAVE_CPU_PPC
#define conv_double_short conv_double_short_table
#define conv_short_double conv_short_double_ppcasm
#else
#define conv_double_short conv_double_short_ref
#define conv_short_double conv_short_double_ref
#endif

#define conv_double_float conv_double_float_ref
#define conv_float_double conv_float_double_ref

void conv_double_short_dstr (double *dest, short *src, int n, int dstr);
void conv_short_double_sstr (short *dest, double *src, int n, int dstr);

void conv_double_float_ref (double *dest, float *src, int n);
void conv_float_double_ref (float *dest, double *src, int n);
void conv_double_float_dstr (double *dest, float *src, int n, int dstr);
void conv_float_double_sstr (float *dest, double *src, int n, int sstr);

#endif /* __PRIVATE_H__ */