+void
+LV2PluginUI::parameter_update (uint32_t port_index, float val)
+{
+ const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
+ LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
+ if (ui_desc->port_event)
+ ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
+ _values[port_index] = val;
+}
+