sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
if (sps->ref_frame_count > MAX_PICTURE_COUNT - 2 ||
sps->ref_frame_count > 16U) {
sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
if (sps->ref_frame_count > MAX_PICTURE_COUNT - 2 ||
sps->ref_frame_count > 16U) {