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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dolby_cp750.h"
#include "i18n.h"
using namespace std;
DolbyCP750::DolbyCP750 ()
: CinemaSoundProcessor ("dolby_cp750", _("Dolby CP650 and CP750"))
{
}
float
DolbyCP750::db_for_fader_change (float from, float to) const
{
float db = 0;
if (from < to) {
if (from <= 4) {
float const t = min (to, 4.0f);
db += (t - from) * 20;
}
if (to > 4) {
float const t = max (from, 4.0f);
db += (to - t) * 3.33333333333333333;
}
} else {
if (from >= 4) {
float const t = max (to, 4.0f);
db -= (from - t) * 3.33333333333333333;
}
if (to < 4) {
float const t = min (from, 4.0f);
db -= (t - to) * 20;
}
}
return db;
}
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