Various work on audio channel mapping.

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

diff --git a/src/lib/playlist.cc b/src/lib/playlist.cc
index e0220ef6f6377768852a80ec0e60a489586b28c3..3f7905fa9c11c251bacdeeefb38f565aab699141 100644 (file)
--- a/src/lib/playlist.cc
+++ b/src/lib/playlist.cc
@@ -30,6 +30,7 @@
 using std::list;
 using std::cout;
 using std::vector;
+using std::min;
 using boost::shared_ptr;
 using boost::weak_ptr;
 using boost::dynamic_pointer_cast;
@@ -224,3 +225,47 @@ Playlist::content_changed (weak_ptr<Content> c, int p)
 {
        ContentChanged (c, p);
 }
+
+AudioMapping
+Playlist::default_audio_mapping () const
+{
+       AudioMapping m;
+
+       switch (_audio_from) {
+       case AUDIO_NONE:
+               break;
+       case AUDIO_FFMPEG:
+               if (_ffmpeg->audio_channels() == 1) {
+                       /* Map mono sources to centre */
+                       m.add (AudioMapping::Channel (_ffmpeg, 0), libdcp::CENTRE);
+               } else {
+                       int const N = min (_ffmpeg->audio_channels (), MAX_AUDIO_CHANNELS);
+                       /* Otherwise just start with a 1:1 mapping */
+                       for (int i = 0; i < N; ++i) {
+                               m.add (AudioMapping::Channel (_ffmpeg, i), (libdcp::Channel) i);
+                       }
+               }
+               break;
+
+       case AUDIO_SNDFILE:
+       {
+               int n = 0;
+               for (list<shared_ptr<const SndfileContent> >::const_iterator i = _sndfile.begin(); i != _sndfile.end(); ++i) {
+                       cout << "sndfile " << (*i)->audio_channels() << "\n";
+                       for (int j = 0; j < (*i)->audio_channels(); ++j) {
+                               m.add (AudioMapping::Channel (*i, j), (libdcp::Channel) n);
+                               ++n;
+                               if (n >= MAX_AUDIO_CHANNELS) {
+                                       break;
+                               }
+                       }
+                       if (n >= MAX_AUDIO_CHANNELS) {
+                               break;
+                       }
+               }
+               break;
+       }
+       }
+
+       return m;
+}