/* * Copyright 2003-2016 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" enum ReplayGainMode { REPLAY_GAIN_AUTO = -2, REPLAY_GAIN_OFF, REPLAY_GAIN_ALBUM, REPLAY_GAIN_TRACK, }; struct ReplayGainTuple { float gain; float peak; void Clear() { gain = -200; peak = 0.0; } constexpr bool IsDefined() const { return gain > -100; } gcc_pure float CalculateScale(float preamp, float missing_preamp, bool peak_limit) const; }; struct ReplayGainInfo { ReplayGainTuple tuples[2]; constexpr bool IsDefined() const { return tuples[REPLAY_GAIN_ALBUM].IsDefined() || tuples[REPLAY_GAIN_TRACK].IsDefined(); } const ReplayGainTuple &Get(ReplayGainMode mode) const { return mode == REPLAY_GAIN_ALBUM ? (tuples[REPLAY_GAIN_ALBUM].IsDefined() ? tuples[REPLAY_GAIN_ALBUM] : tuples[REPLAY_GAIN_TRACK]) : (tuples[REPLAY_GAIN_TRACK].IsDefined() ? tuples[REPLAY_GAIN_TRACK] : tuples[REPLAY_GAIN_ALBUM]); } void Clear() { tuples[REPLAY_GAIN_ALBUM].Clear(); tuples[REPLAY_GAIN_TRACK].Clear(); } }; #endif