2 Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "mid_side_decoder.h"
21 #include "audio_buffers.h"
26 using boost::shared_ptr;
29 MidSideDecoder::name () const
31 return _("Mid-side decoder");
35 MidSideDecoder::id () const
37 return N_("mid-side-decoder");
41 MidSideDecoder::in_channels () const
43 return ChannelCount (2);
47 MidSideDecoder::out_channels (int) const
52 shared_ptr<AudioProcessor>
53 MidSideDecoder::clone (int) const
55 return shared_ptr<AudioProcessor> (new MidSideDecoder ());
58 shared_ptr<AudioBuffers>
59 MidSideDecoder::run (shared_ptr<const AudioBuffers> in)
61 shared_ptr<AudioBuffers> out (new AudioBuffers (3, in->frames ()));
62 for (int i = 0; i < in->frames(); ++i) {
63 float const left = in->data()[0][i];
64 float const right = in->data()[1][i];
65 float const mid = (left + right) / 2;
66 out->data()[0][i] = left - mid;
67 out->data()[1][i] = right - mid;
68 out->data()[2][i] = mid;