74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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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_OFF = -1,
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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);
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/**
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* Attempt to auto-complete missing data. In particular, if album
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* information is missing, track gain is used.
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*/
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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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