Simple cover sheet support (#1039).

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

diff --git a/src/lib/util.cc b/src/lib/util.cc
index 574d1d8894a94b9a6735e81b2246b9632dc8f2b8..b1dfeab558421d3406d5535ad3022e2d63409687 100644 (file)
--- a/src/lib/util.cc
+++ b/src/lib/util.cc
@@ -88,6 +88,7 @@ using std::pair;
 using std::cout;
 using std::bad_alloc;
 using std::set_terminate;
+using std::make_pair;
 using boost::shared_ptr;
 using boost::thread;
 using boost::optional;
@@ -706,3 +707,29 @@ careful_string_filter (string s)
 
        return out;
 }
+
+/** @param mapped List of mapped audio channels from a Film.
+ *  @param channels Total number of channels in the Film.
+ *  @return First: number of non-LFE channels, second: number of LFE channels.
+ */
+pair<int, int>
+audio_channel_types (list<int> mapped, int channels)
+{
+       int non_lfe = 0;
+       int lfe = 0;
+
+       BOOST_FOREACH (int i, mapped) {
+               if (i >= channels) {
+                       /* This channel is mapped but is not included in the DCP */
+                       continue;
+               }
+
+               if (static_cast<dcp::Channel> (i) == dcp::LFE) {
+                       ++lfe;
+               } else {
+                       ++non_lfe;
+               }
+       }
+
+       return make_pair (non_lfe, lfe);
+}