SEG_LVL_ALT_LF
(1 << SEG_LVL_ALT_LF) : 0;
vp9->seg_4lf.feature_data[i][SEG_LVL_ALT_LF] =
if (segfeature_active(seg, seg_id, SEG_LVL_ALT_LF)) {
SEG_LVL_ALT_LF);