New tractor constructor

[mlt] / src / framework / mlt_tractor.c

diff --git a/src/framework/mlt_tractor.c b/src/framework/mlt_tractor.c
index 5b571be9e3eb66ac9ee50008fc25b8192a035c37..c07b70411c3c9fa6dffa99f90ba8e2f4dfa85e5b 100644 (file)
--- a/src/framework/mlt_tractor.c
+++ b/src/framework/mlt_tractor.c
@@ -23,6 +23,7 @@
 #include "mlt_tractor.h"
 #include "mlt_frame.h"
 #include "mlt_multitrack.h"
+#include "mlt_field.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -70,6 +71,37 @@ mlt_tractor mlt_tractor_init( )
        return this;
 }
 
+mlt_tractor mlt_tractor_new( )
+{
+       mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
+       if ( this != NULL )
+       {
+               mlt_producer producer = &this->parent;
+               if ( mlt_producer_init( producer, this ) == 0 )
+               {
+                       mlt_multitrack multitrack = mlt_multitrack_init( );
+                       mlt_field field = mlt_field_new( multitrack, this );
+                       mlt_properties props = mlt_producer_properties( producer );
+
+                       mlt_properties_set( props, "resource", "<tractor>" );
+                       mlt_properties_set( props, "mlt_type", "mlt_producer" );
+                       mlt_properties_set( props, "mlt_service", "tractor" );
+                       mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
+                       mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
+
+                       producer->get_frame = producer_get_frame;
+                       producer->close = ( mlt_destructor )mlt_tractor_close;
+                       producer->close_object = this;
+               }
+               else
+               {
+                       free( this );
+                       this = NULL;
+               }
+       }
+       return this;
+}
+
 /** Get the service object associated to the tractor.
 */
 
@@ -94,6 +126,22 @@ mlt_properties mlt_tractor_properties( mlt_tractor this )
        return mlt_producer_properties( &this->parent );
 }
 
+/** Get the field this tractor is harvesting.
+*/
+
+mlt_field mlt_tractor_field( mlt_tractor this )
+{
+       return mlt_properties_get_data( mlt_tractor_properties( this ), "field", NULL );
+}
+
+/** Get the multitrack this tractor is pulling.
+*/
+
+mlt_multitrack mlt_tractor_multitrack( mlt_tractor this )
+{
+       return mlt_properties_get_data( mlt_tractor_properties( this ), "multitrack", NULL );
+}
+
 /** Connect the tractor.
 */