mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-20 23:36:38 +00:00
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/* 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 __GST_RESAMPLE_H__
|
|
#define __GST_RESAMPLE_H__
|
|
|
|
typedef enum {
|
|
GST_RESAMPLE_NEAREST = 0,
|
|
GST_RESAMPLE_BILINEAR,
|
|
GST_RESAMPLE_SINC_SLOW,
|
|
GST_RESAMPLE_SINC,
|
|
} gst_resample_method;
|
|
|
|
typedef enum {
|
|
GST_RESAMPLE_S16 = 0,
|
|
GST_RESAMPLE_FLOAT
|
|
} gst_resample_format;
|
|
|
|
typedef struct gst_resample_s gst_resample_t;
|
|
|
|
struct gst_resample_s {
|
|
/* parameters */
|
|
|
|
gst_resample_method method;
|
|
int channels;
|
|
int verbose;
|
|
gst_resample_format format;
|
|
|
|
int filter_length;
|
|
|
|
double i_rate;
|
|
double o_rate;
|
|
|
|
void *priv;
|
|
|
|
void *(*get_buffer)(void *priv, unsigned int size);
|
|
|
|
/* internal parameters */
|
|
|
|
double halftaps;
|
|
|
|
/* filter state */
|
|
|
|
void *buffer;
|
|
int buffer_len;
|
|
|
|
double i_start;
|
|
double o_start;
|
|
|
|
double i_start_buf;
|
|
double i_end_buf;
|
|
|
|
double i_inc;
|
|
double o_inc;
|
|
|
|
double i_end;
|
|
double o_end;
|
|
|
|
int i_samples;
|
|
int o_samples;
|
|
|
|
void *i_buf, *o_buf;
|
|
|
|
double acc[10];
|
|
|
|
/* methods */
|
|
void (*scale)(gst_resample_t *r);
|
|
|
|
double ack;
|
|
};
|
|
|
|
void gst_resample_init(gst_resample_t *r);
|
|
|
|
void gst_resample_reinit(gst_resample_t *r);
|
|
|
|
void gst_resample_scale(gst_resample_t *r, void *i_buf, unsigned int size);
|
|
|
|
#endif /* __GST_RESAMPLE_H__ */
|
|
|