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/*
* Copyright (C) 2003-2013 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_HXX
#define MPD_REPLAY_GAIN_INFO_HXX
#include "check.h"
#include "Compiler.h"
#include <cmath>
enum ReplayGainMode {
REPLAY_GAIN_AUTO = -2,
REPLAY_GAIN_OFF,
REPLAY_GAIN_ALBUM,
REPLAY_GAIN_TRACK,
};
struct ReplayGainTuple {
float gain;
float peak;
void Clear() {
gain = INFINITY;
peak = 0.0;
}
gcc_pure
bool IsDefined() const {
return !std::isinf(gain);
}
gcc_pure
float CalculateScale(float preamp, float missing_preamp,
bool peak_limit) const;
};
struct ReplayGainInfo {
ReplayGainTuple tuples[2];
void Clear() {
tuples[REPLAY_GAIN_ALBUM].Clear();
tuples[REPLAY_GAIN_TRACK].Clear();
}
/**
* Attempt to auto-complete missing data. In particular, if
* album information is missing, track gain is used.
*/
void Complete();
};
#endif
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