tree b3b23be1d051579fbc6e3046b0199185d66470fa
parent 0fcf6f8e9fe99efb58a5b7a9966138634118c207
author Yunqing Wang <yunqingwang@google.com> 1570840926 -0700
committer Yunqing Wang <yunqingwang@google.com> 1571072282 +0000

Consolidate frame_to_blur_backward/forward calculation

This patch consolidated frame_to_blur_backward/forward calculation in
temporal filtering. Also removed the restriction that frame_to_blur_
backward has to equal frame_to_blur_forward, which generated better
filtering result and gave quality gain.

Borg test result at speed 1(60 frames):
       avg_psnr: ovr_psnr: ssim:
hdres:  -0.162    -0.391  -0.312
midres: -0.118    -0.205  -0.136
lowres: -0.147    -0.242  -0.234

STATS_CHANGED

Change-Id: Id75a8ddd14d427cc321c06c4175be9b620b6a6f9