tree 13e8adaee0c65c2e71582f57c46187187203524e
parent 2c9f625a2ba9267427464303a8d741a75c02dd48
author Marco Paniconi <marpan@google.com> 1603082371 -0700
committer Marco Paniconi <marpan@google.com> 1603135533 +0000

rtc: Use larger multiplier for Q-based loopfilter

For nonrd_pickmode (speed >= 7) on higher resolns,
used larger multiplier for loopfilter strength
in the LPF_PICK_FROM_Q method.

bdrate gains on rtc set:
speed 9: 1.6, max 3.8
speed 8: 1.4, max 3.6
speed 7: 1.1, max 2.9

bdrate gains are neutral for low-resoln (rtc_derf),
with a few clips regressed about 1-2%, so condition
the change on resolutions about CIF for now.

Change-Id: I0d5ebb9b01ce6d53e19244896fbfb5ae3696cba0