tree f9fd947b7c19270cb0a7a0a3c669e35e271f4ee8
parent ce7df790c73ddce65f11eb1b4cf69bd3e9061cc4
author Lester Lu <kslu@google.com> 1561771287 -0700
committer Lester Lu <kslu@google.com> 1562964943 +0000

Reduced intra tx set

With this speed feature, two least freqently selected
transform types for each intra mode are pruned in transform
type search.

BD rate:
           lowres   midres
speed 0    0.008%   0.021%
speed 1   -0.012%   0.036%
speed 2    0.017%   0.031%

Encoding time reduction:
speed 0    4.00%
speed 1    5.25%
speed 2    7.17%

Instruction count reduction: 4%

STATS_CHANGED

Change-Id: I1be41ea54c8bf1d255db2e4b6f9659a9729cf5d0