doubleboost_pairs=slow_mode?1.0:clt_parameters.imp.cuas_boost_slow;// 4.0; // if >1 and the motion vector is below tile_size/cuas_boost_slow, scale corr_pairs
doubleboost_mstr=clt_parameters.imp.cuas_boost_mstr;// 0.007; // scale corr_pairs if motion strength is below
// int precorr_ra = clt_parameters.imp.cuas_precorr_ra; // 4 (10)