/* * Copyright (C) 2003-2010 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_H #define MPD_REPLAY_GAIN_INFO_H #include "check.h" #include <stdbool.h> #include <math.h> enum replay_gain_mode { REPLAY_GAIN_AUTO = -2, REPLAY_GAIN_OFF, REPLAY_GAIN_ALBUM, REPLAY_GAIN_TRACK, }; struct replay_gain_tuple { float gain; float peak; }; struct replay_gain_info { struct replay_gain_tuple tuples[2]; }; static inline void replay_gain_tuple_init(struct replay_gain_tuple *tuple) { tuple->gain = INFINITY; tuple->peak = 0.0; } static inline void replay_gain_info_init(struct replay_gain_info *info) { replay_gain_tuple_init(&info->tuples[REPLAY_GAIN_ALBUM]); replay_gain_tuple_init(&info->tuples[REPLAY_GAIN_TRACK]); } static inline bool replay_gain_tuple_defined(const struct replay_gain_tuple *tuple) { return !isinf(tuple->gain); } float replay_gain_tuple_scale(const struct replay_gain_tuple *tuple, float preamp, float missing_preamp, bool peak_limit); /** * Attempt to auto-complete missing data. In particular, if album * information is missing, track gain is used. */ void replay_gain_info_complete(struct replay_gain_info *info); #endif