typedef struct mlt_tractor_s *mlt_tractor;
typedef struct mlt_field_s *mlt_field;
typedef struct mlt_consumer_s *mlt_consumer;
+typedef struct mlt_deque_s *mlt_deque;
typedef void ( *mlt_destructor )( void * );
typedef char *( *mlt_serialiser )( void *, int length );
+#define MLT_SERVICE(x) ( ( mlt_service )( x ) )
+#define MLT_PRODUCER(x) ( ( mlt_producer )( x ) )
+#define MLT_MULTITRACK(x) ( ( mlt_multitrack )( x ) )
+#define MLT_PLAYLIST(x) ( ( mlt_playlist )( x ) )
+#define MLT_TRACTOR(x) ( ( mlt_tractor )( x ) )
+#define MLT_FILTER(x) ( ( mlt_filter )( x ) )
+#define MLT_TRANSITION(x) ( ( mlt_transition )( x ) )
#endif