tree be59f060d6644b497f42f79f8e545715d0de35d5
parent 01626502e1541c69306509a2603d7a12228e8e11
author Yunqing Wang <yunqingwang@google.com> 1630435864 -0700
committer Yunqing Wang <yunqingwang@google.com> 1630527723 +0000

rtc: make rt mode speed 0 to 4 the same

As Ranjit pointed out, outputs from rt speed 1 to 4 bit-match, but
mismatch with that of speed = 0. This CL eliminated that mismatch.
The purpose of doing this was to reduce any maintenance for those
unused rt speeds (i.e. rt speed 0 - 4). After the change, speed 0
is the same as speed 1 to 4 (verified by Borg tests). Also, saw
that speed 0 was made better in both coding efficiency & speed.
Here is Borg results at speed 0.
          avg_psnr:  ovr_psnr:  ssim:  encoder speed:
rtc_derf:  -0.809     -1.018   -0.712    15.990
rtc:       -0.074     -0.124   -0.279     8.256
Note: Less gain was seen for rtc set since this change only applied
to AOMMIN(width, height) <= 480 clips.

STATS_CHANGED for rt speed 0

Change-Id: If64628cbdb78d628023c9e39c13ce8da4f7ee96c