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
|
/*
* audio.h
* Copyright 2009-2011 John Lindgren
*
* 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
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#ifndef LIBAUDCORE_AUDIO_H
#define LIBAUDCORE_AUDIO_H
/* 24-bit integer samples are padded to 32-bit; high byte is always 0 */
enum {
FMT_FLOAT,
FMT_S8, FMT_U8,
FMT_S16_LE, FMT_S16_BE, FMT_U16_LE, FMT_U16_BE,
FMT_S24_LE, FMT_S24_BE, FMT_U24_LE, FMT_U24_BE,
FMT_S32_LE, FMT_S32_BE, FMT_U32_LE, FMT_U32_BE};
#if @BIGENDIAN@
#define FMT_S16_NE FMT_S16_BE
#define FMT_U16_NE FMT_U16_BE
#define FMT_S24_NE FMT_S24_BE
#define FMT_U24_NE FMT_U24_BE
#define FMT_S32_NE FMT_S32_BE
#define FMT_U32_NE FMT_U32_BE
#else
#define FMT_S16_NE FMT_S16_LE
#define FMT_U16_NE FMT_U16_LE
#define FMT_S24_NE FMT_S24_LE
#define FMT_U24_NE FMT_U24_LE
#define FMT_S32_NE FMT_S32_LE
#define FMT_U32_NE FMT_U32_LE
#endif
#define FMT_SIZEOF(f) ((f) == FMT_FLOAT ? sizeof (float) : (f) <= FMT_U8 ? 1 : (f) <= FMT_U16_BE ? 2 : 4)
void audio_interlace (const void * const * in, int format, int channels, void * out, int frames);
void audio_from_int (const void * in, int format, float * out, int samples);
void audio_to_int (const float * in, void * out, int format, int samples);
void audio_amplify (float * data, int channels, int frames, float * factors);
void audio_soft_clip (float * data, int samples);
#endif /* LIBAUDCORE_AUDIO_H */
|
