tree 940ae9bfdb3dbe8143d598a652d2c971d3faa117
parent 587ba3a7d0ed5314b15d086ed144dfcbfa93f779
author Ravi Chaudhary <ravi.chaudhary@ittiam.com> 1598590704 +0530
committer Yunqing Wang <yunqingwang@google.com> 1599589365 +0000

Bypass tx type search for DC only blocks

This CL adds logic to predict DC only blocks if the
residual variance is below a qstep based threshold.
For such blocks, transform type search is bypassed.

         Instruction Count       BD-Rate Loss(%)
cpu-used   Reduction(%)    avg.psnr  ovr.psnr  ssim
   6          1.367        0.1291    0.1265    0.0428

STATS_CHANGED

Change-Id: I2ea9565906b5cc13cbf88d6ba1846ecf9f000672