tree bceb2aa2be828cdd7257136422db2bfb1debdcbb
parent de3a75dc78130b872ff4e055622ae47dfcb84d95
author Jayasanker J <jayasanker.j@ittiam.com> 1637938575 +0530
committer Chi Yo Tsai <chiyotsai@google.com> 1638474541 +0000

Allintra: Prune winner mode processing based on source variance

The sf prune_winner_mode_processing_using_src_var is introduced
to disable winner mode processing for blocks with low source
variance. The threshold to disable winner mode processing is
calculated based on qindex. The sf is enabled for allintra
cpu-used>=6.

For AVIF still-image encode,

             Encode Time      BD-Rate Loss(%)
cpu-used     Reduction(%)     psnr       ssim
    6           3.804         0.2174     0.3855
    7           5.239         0.0420     0.4382
    8           1.327         0.0077     0.0108
    9           0.000         0.0000     0.0000

STATS_CHANGED for --allintra encode

Change-Id: I2d95ace6c5ab2c72abc79c0358066e76cd23810c