tree d37d479af3baecbdf541617ef9c0142653fbbfb0
parent 978b3c2f762da515fd0eb5379ee851618cf33955
author Jingning Han <jingning@google.com> 1563914083 -0700
committer Jingning Han <jingning@google.com> 1564003600 +0000

Tune the reference frame assignment to fit speed feature

Adjust the reference frame assignment to better fit the existing
speed features. Local test on bus_cif at 1000 kbps shows about
10% speed up in speed 1. The compression performance is slightly
improved by 0.02% - 0.08% in speed 1 and 150 frames across lowres,
midres, and ugc360.

STATS_CHANGED

Change-Id: I43a70b6ea7d5ba30ad65f03fc596b732c7bd1d64