Refactor controls

src/process_pipeline.h

@@ -29,6 +29,11 @@ struct mp_process_pipeline_state {
         bool has_auto_focus_start;
 
         bool flash_enabled;
+
+        bool control_gain;
+        bool control_exposure;
+        bool control_flash;
+        bool control_focus;
 };
 
 bool mp_process_find_processor(char *script);