Use MCASoundField::STEREO (20) for stereo DCPs.

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

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index 2e732c280277fd44938ff75482c7eaad87e8759a..f7665a7a7011f1a01efe0a56ac2ebbe884710bb2 100644 (file)
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -657,14 +657,17 @@ Writer::finish (boost::filesystem::path output_dcp)
                cpl->set_sign_language_video_language (*film()->sign_language_video_language());
        }
 
-       auto ac = film()->mapped_audio_channels();
-       dcp::MCASoundField field = (
-               find(ac.begin(), ac.end(), static_cast<int>(dcp::Channel::BSL)) != ac.end() ||
-               find(ac.begin(), ac.end(), static_cast<int>(dcp::Channel::BSR)) != ac.end()
-               ) ? dcp::MCASoundField::SEVEN_POINT_ONE : dcp::MCASoundField::FIVE_POINT_ONE;
+       dcp::MCASoundField field;
+       if (film()->audio_channels() == 2) {
+               field = dcp::MCASoundField::STEREO;
+       } else if (film()->audio_channels() <= 6) {
+               field = dcp::MCASoundField::FIVE_POINT_ONE;
+       } else {
+               field = dcp::MCASoundField::SEVEN_POINT_ONE;
+       }
 
        dcp::MainSoundConfiguration msc (field, film()->audio_channels());
-       for (auto i: ac) {
+       for (auto i: film()->mapped_audio_channels()) {
                if (static_cast<int>(i) < film()->audio_channels()) {
                        msc.set_mapping (i, static_cast<dcp::Channel>(i));
                }