tree bd286eeff2d82b9f85a8694fb696c60dc4c93e03
parent 2d6923a5c60fad9f62ae512ee4ad0c417302dfb3
author Sai Deng <sdeng@google.com> 1618356823 -0700
committer Sai Deng <sdeng@google.com> 1618976819 +0000

Add color range detection in tune=butteraugli mode

Use the correct coefficients for YUV->RGB conversion based on the color
range. Get about additional -0.2% Butteraugli gains in
tune=butteraugli mode.

Performance of tune=butteraugli mode. Baseline: tune=psnr, speed 6
                        PSNR    SSIM    Butteraugli
HDRplus (limited range) 4.0%   -2.5%    -18.1%
HDRplus (full range)    3.4%   -2.0%    -19.2%

Change-Id: If0920d75c31863022081c3fe340940c59d228a0d