VLC_EXPORT( spu_t *, vout_GetSpu, ( vout_thread_t * ) );
void vout_IntfInit( vout_thread_t * );
-VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, char *,bool , bool ) );
+VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, const char *,bool , bool ) );
static inline int vout_vaControl( vout_thread_t *p_vout, int i_query,