1 files changed, 12 insertions, 0 deletions
diff --git a/src/lib/util.h b/src/lib/util.h
index acdc861ae..cf03423c7 100644
--- a/src/lib/util.h
+++ b/src/lib/util.h
@@ -32,6 +32,7 @@
 #include "dcpomatic_time.h"
 #include "pixel_quanta.h"
 #include "types.h"
+#include <libcxml/cxml.h>
 #include <dcp/atmos_asset.h>
 #include <dcp/decrypted_kdm.h>
 #include <dcp/util.h>
@@ -151,4 +152,15 @@ list_to_vector (std::list<T> v)
 	return l;
 }
 
+template <class T>
+T
+number_attribute(cxml::ConstNodePtr node, std::string name1, std::string name2)
+{
+	auto value = node->optional_number_attribute<T>(name1);
+	if (!value) {
+		value = node->number_attribute<T>(name2);
+	}
+	return *value;
+}
+
 #endif