tree 8c9d2cebfdd71ac99450891b670eeda9a0275bb1
parent e7d5e74efce819f9acaab0d5d5dc39d6fe9d0a75
author Mudassir Galaganath <mudassir.galaganath@ittiam.com> 1672839224 +0530
committer Wan-Teh Chang <wtc@google.com> 1673306284 +0000

Allintra: Set superblock size as 64x64 for speed>=9

Superblock size of 128x128 may not be required during allintra
encode since maximum partition size is 32x32 for speed>=6. This
CL forces SB size to 64x64 to improve the multithread performance
as top-right delay and thread sync wastage are reduced. This CL
is applicable for speed>=9, resolutions lesser than 4K.

For AVIF still-image encode,

             Encode Time     BD-Rate Loss(%)
cpu-used     Reduction(%)    psnr       ssim
   9           1.972        -0.0135    -0.0166

For AVIF still-image encode, an average encode time reduction of
~4.7% is observed across different resolutions with speed=9 and
threads=4.

STATS_CHANGED for speed=9

Change-Id: I90ba9461f53a28bdc95c8233ca9ec5ec62472005