ref: 5cfaf561d9928261f3ff49d744239cc0dcf877b9
parent: 7d670d88fe11a73191101b2c2e0b92493136024f
author: sdeng <sdeng@google.com>
date: Fri May 31 10:35:02 EDT 2019
Use distortion and rate of best_rd as the params
Also added rd calculation for negative rates and distortions.
This CL is a preparation for implementing hierarchical SSIM rdmult scaling.
Little impact on quality and speed:
avg_psnr ovr_psnr ssim
(mid_res) -0.015 -0.009 -0.018
perf stat -e instructions:u ./vpxenc park_joy_480p.y4m --limit=50
with this cl: 317,700,108,619
before: 317,669,279,763
Change-Id: I01588758b7be2aab32236440ec0e57d7af56e920