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replay_gain_info.h
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/*
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* Copyright (C) 2003-2010 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_REPLAY_GAIN_INFO_H
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#define MPD_REPLAY_GAIN_INFO_H
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#include "
check.h
"
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#include <stdbool.h>
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#include <math.h>
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enum
replay_gain_mode
{
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REPLAY_GAIN_AUTO
= -2,
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REPLAY_GAIN_OFF
,
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REPLAY_GAIN_ALBUM
,
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REPLAY_GAIN_TRACK
,
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};
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struct
replay_gain_tuple
{
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float
gain
;
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float
peak
;
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};
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struct
replay_gain_info
{
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struct
replay_gain_tuple
tuples
[2];
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};
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static
inline
void
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replay_gain_tuple_init
(
struct
replay_gain_tuple
*tuple)
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{
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tuple->
gain
= INFINITY;
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tuple->
peak
= 0.0;
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}
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static
inline
void
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replay_gain_info_init
(
struct
replay_gain_info
*info)
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{
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replay_gain_tuple_init
(&info->
tuples
[
REPLAY_GAIN_ALBUM
]);
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replay_gain_tuple_init
(&info->
tuples
[
REPLAY_GAIN_TRACK
]);
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}
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static
inline
bool
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replay_gain_tuple_defined
(
const
struct
replay_gain_tuple
*tuple)
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{
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return
!isinf(tuple->
gain
);
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}
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float
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replay_gain_tuple_scale
(
const
struct
replay_gain_tuple
*tuple,
float
preamp,
float
missing_preamp,
bool
peak_limit);
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void
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replay_gain_info_complete
(
struct
replay_gain_info
*info);
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#endif
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