51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
|
|
* Copyright (C) 2003-2014 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 "ReplayGainInfo.hxx"
|
|
|
|
#include <math.h>
|
|
|
|
float
|
|
ReplayGainTuple::CalculateScale(float preamp, float missing_preamp,
|
|
bool peak_limit) const
|
|
{
|
|
float scale;
|
|
|
|
if (IsDefined()) {
|
|
scale = pow(10.0, gain / 20.0);
|
|
scale *= preamp;
|
|
if (scale > 15.0)
|
|
scale = 15.0;
|
|
|
|
if (peak_limit && scale * peak > 1.0)
|
|
scale = 1.0 / peak;
|
|
} else
|
|
scale = missing_preamp;
|
|
|
|
return scale;
|
|
}
|
|
|
|
void
|
|
ReplayGainInfo::Complete()
|
|
{
|
|
if (!tuples[REPLAY_GAIN_ALBUM].IsDefined())
|
|
tuples[REPLAY_GAIN_ALBUM] = tuples[REPLAY_GAIN_TRACK];
|
|
}
|