mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-18 15:51:11 +00:00
128 lines
3.2 KiB
C
128 lines
3.2 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 __RESAMPLE_H__
|
|
#define __RESAMPLE_H__
|
|
|
|
#include "functable.h"
|
|
#include "buffer.h"
|
|
|
|
#ifndef M_PI
|
|
#define M_PI 3.14159265358979323846
|
|
#endif
|
|
|
|
#ifdef WIN32
|
|
#define rint(x) (floor((x)+0.5))
|
|
#endif
|
|
|
|
typedef enum {
|
|
RESAMPLE_FORMAT_S16 = 0,
|
|
RESAMPLE_FORMAT_S32,
|
|
RESAMPLE_FORMAT_F32,
|
|
RESAMPLE_FORMAT_F64
|
|
} ResampleFormat;
|
|
|
|
typedef void (*ResampleCallback) (void *);
|
|
|
|
typedef struct _ResampleState ResampleState;
|
|
|
|
struct _ResampleState {
|
|
/* parameters */
|
|
|
|
int n_channels;
|
|
ResampleFormat format;
|
|
|
|
int filter_length;
|
|
|
|
double i_rate;
|
|
double o_rate;
|
|
|
|
int method;
|
|
|
|
/* internal parameters */
|
|
|
|
int need_reinit;
|
|
|
|
double halftaps;
|
|
|
|
/* filter state */
|
|
|
|
unsigned char *o_buf;
|
|
int o_size;
|
|
|
|
AudioresampleBufferQueue *queue;
|
|
int eos;
|
|
int started;
|
|
|
|
int sample_size;
|
|
|
|
unsigned char *buffer;
|
|
int buffer_len;
|
|
int buffer_filled;
|
|
|
|
double i_start;
|
|
double o_start;
|
|
|
|
double i_inc;
|
|
double o_inc;
|
|
|
|
double sinc_scale;
|
|
|
|
double i_end;
|
|
double o_end;
|
|
|
|
int i_samples;
|
|
int o_samples;
|
|
|
|
//void *i_buf;
|
|
|
|
Functable *ft;
|
|
|
|
double *out_tmp;
|
|
};
|
|
|
|
void resample_init (void);
|
|
void resample_cleanup (void);
|
|
|
|
ResampleState *resample_new (void);
|
|
void resample_free (ResampleState *state);
|
|
|
|
void resample_add_input_data (ResampleState * r, void *data, int size,
|
|
ResampleCallback free_func, void *closure);
|
|
void resample_input_eos (ResampleState *r);
|
|
void resample_input_flush (ResampleState *r);
|
|
void resample_input_pushthrough (ResampleState *r);
|
|
|
|
int resample_get_output_size_for_input (ResampleState * r, int size);
|
|
int resample_get_input_size_for_output (ResampleState * r, int size);
|
|
|
|
int resample_get_output_size (ResampleState *r);
|
|
int resample_get_output_data (ResampleState *r, void *data, int size);
|
|
|
|
void resample_set_filter_length (ResampleState *r, int length);
|
|
void resample_set_input_rate (ResampleState *r, double rate);
|
|
void resample_set_output_rate (ResampleState *r, double rate);
|
|
void resample_set_n_channels (ResampleState *r, int n_channels);
|
|
void resample_set_format (ResampleState *r, ResampleFormat format);
|
|
void resample_set_method (ResampleState *r, int method);
|
|
int resample_format_size (ResampleFormat format);
|
|
|
|
#endif /* __RESAMPLE_H__ */
|
|
|