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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "gain.h"
using boost::shared_ptr;
/** @param gain gain in dB */
Gain::Gain (shared_ptr<Log> log, float gain)
: AudioProcessor (log)
, _gain (gain)
{
}
void
Gain::process_audio (shared_ptr<AudioBuffers> b)
{
if (_gain != 0) {
float const linear_gain = pow (10, _gain / 20);
for (int i = 0; i < b->channels(); ++i) {
for (int j = 0; j < b->frames(); ++j) {
b->data(i)[j] *= linear_gain;
}
}
}
Audio (b);
}
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