#include "mlt_types.h"
-extern mlt_field mlt_field_init( mlt_service producer );
-extern mlt_service mlt_field_service( mlt_field this );
-extern mlt_properties mlt_field_properties( mlt_field this );
-extern int mlt_field_plant_filter( mlt_field this, mlt_filter that, int track );
-extern int mlt_field_plant_transition( mlt_field this, mlt_transition that, int a_track, int b_track );
-extern void mlt_field_close( mlt_field this );
+extern mlt_field mlt_field_init( );
+extern mlt_field mlt_field_new( mlt_multitrack multitrack, mlt_tractor tractor );
+extern mlt_service mlt_field_service( mlt_field self );
+extern mlt_tractor mlt_field_tractor( mlt_field self );
+extern mlt_multitrack mlt_field_multitrack( mlt_field self );
+extern mlt_properties mlt_field_properties( mlt_field self );
+extern int mlt_field_plant_filter( mlt_field self, mlt_filter that, int track );
+extern int mlt_field_plant_transition( mlt_field self, mlt_transition that, int a_track, int b_track );
+extern void mlt_field_close( mlt_field self );
#endif