std::shared_ptr

[dcpomatic.git] / src / lib / mid_side_decoder.cc

diff --git a/src/lib/mid_side_decoder.cc b/src/lib/mid_side_decoder.cc
index fe628226151e652f66ee12096d03c4ef295557fb..eb87d245b54b7dc6168039157810ad2b68dbb91a 100644 (file)
--- a/src/lib/mid_side_decoder.cc
+++ b/src/lib/mid_side_decoder.cc
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2014-2015 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/>.
 
 */
 
@@ -26,7 +27,7 @@
 using std::string;
 using std::min;
 using std::vector;
-using boost::shared_ptr;
+using std::shared_ptr;
 
 string
 MidSideDecoder::name () const
@@ -40,12 +41,6 @@ MidSideDecoder::id () const
        return N_("mid-side-decoder");
 }
 
-ChannelCount
-MidSideDecoder::in_channels () const
-{
-       return ChannelCount (2);
-}
-
 int
 MidSideDecoder::out_channels () const
 {
@@ -59,16 +54,27 @@ MidSideDecoder::clone (int) const
 }
 
 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);
+       shared_ptr<AudioBuffers> out (new 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;
+               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;
@@ -84,15 +90,11 @@ MidSideDecoder::make_audio_mapping_default (AudioMapping& mapping) const
        }
 }
 
-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"));
-
+       vector<NamedChannel> n;
+       n.push_back (NamedChannel(_("Left"), 0));
+       n.push_back (NamedChannel(_("Right"), 1));
        return n;
 }