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Diffstat (limited to '')
-rw-r--r-- | src/ReplayGainInfo.cxx | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/ReplayGainInfo.cxx b/src/ReplayGainInfo.cxx new file mode 100644 index 000000000..b9d1b82c6 --- /dev/null +++ b/src/ReplayGainInfo.cxx @@ -0,0 +1,48 @@ +/* + * 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. + */ + +#include "config.h" +#include "replay_gain_info.h" + +float +replay_gain_tuple_scale(const struct replay_gain_tuple *tuple, float preamp, float missing_preamp, bool peak_limit) +{ + float scale; + + if (replay_gain_tuple_defined(tuple)) { + scale = pow(10.0, tuple->gain / 20.0); + scale *= preamp; + if (scale > 15.0) + scale = 15.0; + + if (peak_limit && scale * tuple->peak > 1.0) + scale = 1.0 / tuple->peak; + } else + scale = missing_preamp; + + return scale; +} + +void +replay_gain_info_complete(struct replay_gain_info *info) +{ + if (!replay_gain_tuple_defined(&info->tuples[REPLAY_GAIN_ALBUM])) + info->tuples[REPLAY_GAIN_ALBUM] = + info->tuples[REPLAY_GAIN_TRACK]; +} |