/*
- Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ 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.
- This program is distributed in the hope that it will be useful,
+ 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
+
#include "mid_side_decoder.h"
#include "audio_buffers.h"
#include "audio_mapping.h"
#include "i18n.h"
-using std::string;
+
+using std::make_shared;
using std::min;
+using std::shared_ptr;
+using std::string;
using std::vector;
-using boost::shared_ptr;
+
string
MidSideDecoder::name () const
return _("Mid-side decoder");
}
+
string
MidSideDecoder::id () const
{
return N_("mid-side-decoder");
}
-ChannelCount
-MidSideDecoder::in_channels () const
-{
- return ChannelCount (2);
-}
int
MidSideDecoder::out_channels () const
return 3;
}
+
shared_ptr<AudioProcessor>
MidSideDecoder::clone (int) const
{
- return shared_ptr<AudioProcessor> (new MidSideDecoder ());
+ return make_shared<MidSideDecoder>();
}
+
shared_ptr<AudioBuffers>
-MidSideDecoder::run (shared_ptr<const AudioBuffers> in)
+MidSideDecoder::run (shared_ptr<const AudioBuffers> in, int channels)
{
- shared_ptr<AudioBuffers> out (new AudioBuffers (3, in->frames ()));
+ int const N = min (channels, 3);
+ auto out = make_shared<AudioBuffers>(channels, in->frames ());
for (int i = 0; i < in->frames(); ++i) {
- float const left = in->data()[0][i];
- float const right = in->data()[1][i];
- float const mid = (left + right) / 2;
- out->data()[0][i] = left - mid;
- out->data()[1][i] = right - mid;
- out->data()[2][i] = mid;
+ auto const left = in->data()[0][i];
+ auto const right = in->data()[1][i];
+ auto const mid = (left + right) / 2;
+ if (N > 0) {
+ out->data()[0][i] = left - mid;
+ }
+ if (N > 1) {
+ out->data()[1][i] = right - mid;
+ }
+ if (N > 2) {
+ out->data()[2][i] = mid;
+ }
+ }
+
+ for (int i = N; i < channels; ++i) {
+ out->make_silent (i);
}
return out;
}
+
void
MidSideDecoder::make_audio_mapping_default (AudioMapping& mapping) const
{
/* Just map the first two input channels to our M/S */
mapping.make_zero ();
- for (int i = 0; i < min (2, mapping.input_channels()); ++i) {
+ for (int i = 0; i < min(2, mapping.input_channels()); ++i) {
mapping.set (i, i, 1);
}
}
-vector<string>
+
+vector<NamedChannel>
MidSideDecoder::input_names () const
{
- vector<string> n;
-
- /// TRANSLATORS: this is the name of the `mid' channel for mid-side decoding
- n.push_back (_("Mid"));
- /// TRANSLATORS: this is the name of the `side' channel for mid-side decoding
- n.push_back (_("Side"));
-
- return n;
+ return {
+ NamedChannel(_("Left"), 0),
+ NamedChannel(_("Right"), 1)
+ };
}