More playlist modifications; service locking

[melted] / mlt++ / src / MltProducer.cpp

diff --git a/mlt++/src/MltProducer.cpp b/mlt++/src/MltProducer.cpp
index 8eae08c..54473e7 100644 (file)
--- a/mlt++/src/MltProducer.cpp
+++ b/mlt++/src/MltProducer.cpp
@@ -60,9 +60,17 @@ Producer::Producer( Producer &producer ) :
        inc_ref( );
 }
 
+Producer::Producer( Producer *producer ) :
+       instance( producer != NULL ? producer->get_producer( ) : NULL )
+{
+       if ( is_valid( ) )
+               inc_ref( );
+}
+
 Producer::~Producer( )
 {
        mlt_producer_close( instance );
+       instance = NULL;
 }
 
 mlt_producer Producer::get_producer( )