Throw an exception on making a DCP with no reels.

3 files changed, 18 insertions, 0 deletions

diff --git a/src/cpl.cc b/src/cpl.cc
index b19d6d89..22abfb69 100644
--- a/src/cpl.cc
+++ b/src/cpl.cc
@@ -198,6 +198,10 @@ CPL::write_xml (boost::filesystem::path file, Standard standard, shared_ptr<cons
 
 	auto reel_list = root->add_child ("ReelList");
 
+	if (_reels.empty()) {
+		throw NoReelsError ();
+	}
+
 	bool first = true;
 	for (auto i: _reels) {
 		auto asset_list = i->write_to_cpl (reel_list, standard);
diff --git a/src/exceptions.cc b/src/exceptions.cc
index ebe8609a..37e699e6 100644
--- a/src/exceptions.cc
+++ b/src/exceptions.cc
@@ -169,3 +169,11 @@ UnknownChannelIdError::UnknownChannelIdError (std::string id)
 {
 
 }
+
+
+NoReelsError::NoReelsError ()
+	: runtime_error ("Cannot make a DCP when no reels have been added")
+{
+
+}
+
diff --git a/src/exceptions.h b/src/exceptions.h
index b9bcfd37..76a66808 100644
--- a/src/exceptions.h
+++ b/src/exceptions.h
@@ -283,6 +283,12 @@ public:
 };
 
 
+class NoReelsError : public std::runtime_error
+{
+public:
+	NoReelsError ();
+};
+
 }
 
 #endif