mlt_frame mlt_filter_process( mlt_filter self, mlt_frame frame )
{
mlt_properties properties = MLT_FILTER_PROPERTIES( self );
int disable = mlt_properties_get_int( properties, "disable" );
const char *unique_id = mlt_properties_get( properties, "_unique_id" );
mlt_position position = mlt_frame_get_position( frame );
char name[30];
// Make the properties key from unique id
snprintf( name, sizeof(name), "pos.%s", unique_id );
name[sizeof(name) -1] = '\0';
// Save the position on the frame
mlt_properties_set_position( MLT_FRAME_PROPERTIES( frame ), name, position );
if ( disable || self->process == NULL )
{
return frame;
}
else
{
// Add a reference to this filter on the frame
mlt_properties_inc_ref( MLT_FILTER_PROPERTIES(self) );
snprintf( name, sizeof(name), "filter.%s", unique_id );
name[sizeof(name) -1] = '\0';
mlt_properties_set_data( MLT_FRAME_PROPERTIES(frame), name, self, 0,
(mlt_destructor) mlt_filter_close, NULL );
return self->process( self, frame );
}
}
void mlt_filter_close( mlt_filter self )
{
if ( self != NULL && mlt_properties_dec_ref( MLT_FILTER_PROPERTIES( self ) ) <= 0 )
{
if ( self->close != NULL )
{
self->close( self );
}
else
{
self->parent.close = NULL;
mlt_service_close( &self->parent );
}
free( self );
}
}
mlt_frame mlt_filter_process( mlt_filter self, mlt_frame frame )
{
mlt_properties properties = MLT_FILTER_PROPERTIES( self );
int disable = mlt_properties_get_int( properties, "disable" );
const char *unique_id = mlt_properties_get( properties, "_unique_id" );
mlt_position position = mlt_frame_get_position( frame );
char name[20];
// Make the properties key from unique id
strcpy( name, "pos." );
strcat( name, unique_id );
// Save the position on the frame
mlt_properties_set_position( MLT_FRAME_PROPERTIES( frame ), name, position );
if ( disable || self->process == NULL )
return frame;
else
return self->process( self, frame );
}
