1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* LIBOIL - Library of Optimized Inner Loops
* Copyright (c) 2001,2006 David A. Schleef <ds@schleef.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __RESAMPLE_H__
#define __RESAMPLE_H__
#include "functable.h"
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 {
/* static parameters */
int n_channels;
ResampleFormat format;
/* dynamic parameters */
int filter_length;
int ratio_n;
int ratio_d;
double sinc_scale;
int oversample;
/* internal parameters */
void *last_buffer;
int need_reinit;
int sample_size;
Functable *ft;
void *forward_data;
int forward_samples;
/* filter state */
int eos;
void *buffer;
int buffer_len;
int offset;
};
void resample_init(void);
ResampleState *resample_new (ResampleFormat format, int n_channels);
void resample_free (ResampleState *state);
void resample_set_filter_length (ResampleState *r, int length);
void resample_set_ratio (ResampleState *r, int n, int d);
int resample_get_sample_size (ResampleState *r);
void resample_preload_data (ResampleState * r, void *data, int n_samples);
void resample_set_offset (ResampleState *r, int offset);
int resample_get_offset (ResampleState *r);
void resample_push_data (ResampleState * r, void *data, int n_samples);
void resample_push_eos (ResampleState *r);
int resample_get_output_size (ResampleState *r);
void resample_get_output_data (ResampleState *r, void *data, int size);
#endif /* __RESAMPLE_H__ */
|
