gstreamer/gst/audioscale/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"

G_BEGIN_DECLS

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
#  if 0
/* disabled as in .c */
#    define conv_short_double conv_short_double_ppcasm
#  else
#    define conv_short_double conv_short_double_ref
#  endif
#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);

G_END_DECLS

#endif /* __PRIVATE_H__ */