rateEstimateQscale 1339 source/encoder/ratecontrol.cpp         double q = x265_qScale2qp(rateEstimateQscale(curFrame, rce));
rateEstimateQscale  268 source/encoder/ratecontrol.h     double rateEstimateQscale(Frame* pic, RateControlEntry *rce); // main logic for calculating QP based on ABR