ref: c3ceb45aae2d858264df1b7af6d12e6ad663ee1b
parent: 77c1b9d259149fb53d1c1852786568c4367ae85d
author: sdeng <sdeng@google.com>
date: Tue Jan 22 09:05:50 EST 2019
Fix a bug in tune-content film mode
Avoid recursively decreasing 'strength'.
avg_psnr ovr_psnr ssim
midres -0.224 -0.195 -0.115
Change-Id: Ie74c069cda76873ac38e9c1a9162b1ddfb9b103d