+static int SharpenCallback( vlc_object_t *p_this, char const *psz_var,
+ vlc_value_t oldval, vlc_value_t newval,
+ void *p_data )
+{
+ VLC_UNUSED(p_this); VLC_UNUSED(oldval);
+ filter_sys_t *p_sys = (filter_sys_t *)p_data;
+ if( !strcmp( psz_var, FILTER_PREFIX "sigma" ) )
+ p_sys->f_sigma = __MIN( 2., __MAX( 0., newval.f_float ) );
+ init_precalc_table(p_sys);
+ return VLC_SUCCESS;