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Diffstat (limited to '')
-rw-r--r-- | src/replay_gain_info.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/replay_gain_info.h b/src/replay_gain_info.h new file mode 100644 index 000000000..83b46df84 --- /dev/null +++ b/src/replay_gain_info.h @@ -0,0 +1,74 @@ +/* + * 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 |