tree a041201651a76aa0b9e506f7a0e8a5d5052fb165
parent 0714565d896a3bbb9b9d0c4891e36b25853f0479
author Paul Wilkins <paulwilkins@google.com> 1630597396 +0100
committer Paul Wilkins <paulwilkins@google.com> 1630944449 +0000

Change  thresholds in intra_rd_variance_factor()

Reduce thresholds slightly for speeds 1-3 and disable for speeds >=4

For higher speeds there are fewer modes available in the search and
the risk of unpleasant artifacts is increased.

The change to the threshold for action based on speed means that
for speeds >= 4 the adjustment of the rd result will be disabled.

Change made as a response to:-
Issue 3138: Artifacts introduced by variance match weighting

Change-Id: Ib62e004a136f2342b2e0bfbbdaaed95025aec0d1