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
|
/*
* Copyright (C) 2003-2010 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_REPLAY_GAIN_INFO_H
#define MPD_REPLAY_GAIN_INFO_H
#include "check.h"
#include <stdbool.h>
#include <math.h>
enum replay_gain_mode {
REPLAY_GAIN_OFF = -1,
REPLAY_GAIN_ALBUM,
REPLAY_GAIN_TRACK,
};
struct replay_gain_tuple {
float gain;
float peak;
};
struct replay_gain_info {
struct replay_gain_tuple tuples[2];
};
static inline void
replay_gain_tuple_init(struct replay_gain_tuple *tuple)
{
tuple->gain = INFINITY;
tuple->peak = 0.0;
}
static inline void
replay_gain_info_init(struct replay_gain_info *info)
{
replay_gain_tuple_init(&info->tuples[REPLAY_GAIN_ALBUM]);
replay_gain_tuple_init(&info->tuples[REPLAY_GAIN_TRACK]);
}
static inline bool
replay_gain_tuple_defined(const struct replay_gain_tuple *tuple)
{
return !isinf(tuple->gain);
}
float
replay_gain_tuple_scale(const struct replay_gain_tuple *tuple, float preamp);
/**
* Attempt to auto-complete missing data. In particular, if album
* information is missing, track gain is used.
*/
void
replay_gain_info_complete(struct replay_gain_info *info);
#endif
|
