tree bdf5162e00842b964e01d779343789ff1dfb472b
parent 3fe6e0125907df2b6cbb28b0d4281af651c0ec15
author Yunqing Wang <yunqingwang@google.com> 1578953194 -0800
committer Yunqing Wang <yunqingwang@google.com> 1579038925 +0000

Fast motion search in TPL

Currently, TPL motion search could have 4 starting MVs,
which takes over 5% encoder time at speed 5. This patch
adds a condition to accept a new starting MV only if it
is very different from already added starting MVs. This
keeps majority of the quality gain while making the
motion search faster. This can be extended to lower speed
levels.

Borg test results:
       avg_psnr:  ovr_psnr:  ssim:   avg speedups over whole set:
lowres: -0.021    -0.020     0.031          3.3%
midres:  0.015     0.020     0.249          5.7%
hdres:   0.015     0.011     0.182          5.4%

STATS_CHANGED

Change-Id: I2cca2eb1ca0bad00950cbebf00d205d310825d1d