72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
/*
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* Copyright (C) 2003-2015 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_HXX
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#define MPD_REPLAY_GAIN_INFO_HXX
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#include "check.h"
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#include "Compiler.h"
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enum ReplayGainMode {
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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 ReplayGainTuple {
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float gain;
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float peak;
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void Clear() {
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gain = -200;
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peak = 0.0;
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}
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constexpr bool IsDefined() const {
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return gain > -100;
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}
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gcc_pure
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float CalculateScale(float preamp, float missing_preamp,
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bool peak_limit) const;
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};
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struct ReplayGainInfo {
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ReplayGainTuple tuples[2];
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constexpr bool IsDefined() const {
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return tuples[REPLAY_GAIN_ALBUM].IsDefined() ||
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tuples[REPLAY_GAIN_TRACK].IsDefined();
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}
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void Clear() {
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tuples[REPLAY_GAIN_ALBUM].Clear();
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tuples[REPLAY_GAIN_TRACK].Clear();
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}
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/**
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* Attempt to auto-complete missing data. In particular, if
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* album information is missing, track gain is used.
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*/
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void Complete();
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};
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#endif
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