#define MLT_TRACTOR(x) ( ( mlt_tractor )( x ) ) /**< Cast to a Tractor pointer */
#define MLT_FILTER(x) ( ( mlt_filter )( x ) ) /**< Cast to a Filter pointer */
#define MLT_TRANSITION(x) ( ( mlt_transition )( x ) ) /**< Cast to a Transition pointer */
+#define MLT_CONSUMER(x) ( ( mlt_consumer )( x ) ) /**< Cast to a Consumer pointer */
#endif