tree ace803ca5589e674d347b9d23bd1db0fbd440870
parent 92b5cd32ac27098b2d51c4ac506026d1cabbeeef
author Remya Prakasan <remya.prakasan@ittiam.com> 1681365254 +0530
committer Yunqing Wang <yunqingwang@google.com> 1683219008 +0000

Fix and re-enable the sf prune_nearest_near_mv_using_refmv_weight

This sf prunes NEARESTMV and NEARMV when the count of spatial
neighboring mvs is smaller than a threshold.

This sf was earlier disabled due to visual artifacts:
(https://aomedia-review.googlesource.com/c/aom/+/163241/).

This CL fixed and re-enabled the sf for speed >= 5 for 'GOOD'
encoding mode with the below improvements.
The pruning logic is enabled when,
 - both the top and left neighboring blocks are available
 - when a best inter prediction mode is already identified
   for the current block
 - screen content tools are disabled
The improvements mentioned above have reduced the quality
impact and visual artifacts.

For 'good' encoding mode,

          Instruction Count       BD-Rate Loss(%)
cpu-used    Reduction(%)     avg.psnr  ovr.psnr   ssim
   5           0.809         0.0308     0.0305    0.0468
   6           1.114         0.0505     0.0506    0.1004

STATS_CHANGED

BUG=b/245416468

Change-Id: I440cd27edce28ecb6742e06c6497bb3b44fc6c5f