Consider assets outside the DCP as referenced assets (i.e.1.0-vf

not to be written to the asset map).  Return a value from
finalize() to say whether a writer has written anything.
Other small related tweaks.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/asset_writer.cc b/src/asset_writer.cc
index db2d4c53..13adc50e 100644
--- a/src/asset_writer.cc
+++ b/src/asset_writer.cc
@@ -61,9 +61,11 @@ AssetWriter::~AssetWriter ()
 	delete _encryption_context;
 }
 
-void
+/** @return true if anything was written by this writer */
+bool
 AssetWriter::finalize ()
 {
 	DCP_ASSERT (!_finalized);
 	_finalized = true;
+	return _started;
 }