static int filter_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
{
mlt_filter self = service->child;
// Get coords in/out/track
int track = mlt_filter_get_track( self );
int in = mlt_filter_get_in( self );
int out = mlt_filter_get_out( self );
// Get the producer this is connected to
mlt_service producer = mlt_service_producer( &self->parent );
// If the frame request is for this filters track, we need to process it
if ( index == track || track == -1 )
{
int ret = mlt_service_get_frame( producer, frame, index );
if ( ret == 0 )
{
mlt_position position = mlt_frame_get_position( *frame );
if ( position >= in && ( out == 0 || position <= out ) )
*frame = mlt_filter_process( self, *frame );
return 0;
}
else
{
*frame = mlt_frame_init( service );
return 0;
}
}
else
{
return mlt_service_get_frame( producer, frame, index );
}
}
void mlt_field_disconnect_service( mlt_field self, mlt_service service )
{
mlt_service p = mlt_service_producer( service );
mlt_service c = mlt_service_consumer( service);
int i;
switch ( mlt_service_identify(c) )
{
case filter_type:
i = mlt_filter_get_track( MLT_FILTER(c) );
mlt_service_connect_producer( c, p, i );
break;
case transition_type:
i = mlt_transition_get_a_track ( MLT_TRANSITION(c) );
mlt_service_connect_producer( c, p, i );
MLT_TRANSITION(c)->producer = p;
break;
case tractor_type:
self->producer = p;
mlt_tractor_connect( MLT_TRACTOR(c), p );
default:
break;
}
mlt_events_fire( mlt_field_properties( self ), "service-changed", NULL );
}
