tree b73793824166423e82d722533a79311b440e746b
parent 06f2c628967597a0cf78ec4a65cb3e8afe4f5153
author Yunqing Wang <yunqingwang@google.com> 1586906925 -0700
committer Yunqing Wang <yunqingwang@google.com> 1586969372 +0000

Reduce sub-pel precision for fast motion search

Reduced sub-pel search precision to 1/4 pel in TPL and simple motion
search to speed up encoder.

Borg test result at speed 5:
       avg_psnr:  ovr_psnr:  ssim:   avg speed change:
hdres:  -0.013    -0.019    -0.094      3.1%
midres: -0.001     0.034     0.019      2.9%
lowres: -0.033    -0.052    -0.180      2.5%
This change gives good speedups without any quality loss, and will be
tested and enabled for low speed settings.

STATS_CHANGED at speed 5

Change-Id: I02bdd3ac49c925b7fe848e4dc829d6e1c2775c2b