+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ var_DelCallback( p_filter, "contrast", AdjustCallback, p_sys );
+ var_DelCallback( p_filter, "brightness", AdjustCallback, p_sys );
+ var_DelCallback( p_filter, "hue", AdjustCallback, p_sys );
+ var_DelCallback( p_filter, "saturation", AdjustCallback, p_sys );
+ var_DelCallback( p_filter, "gamma", AdjustCallback, p_sys );
+ var_DelCallback( p_filter, "brightness-threshold",
+ AdjustCallback, p_sys );
+
+ vlc_mutex_destroy( &p_sys->lock );
+ free( p_sys );