tree 5b695a203bd247bd5644091dda1093d3ace1f60a
parent 278358554b2bcfb61d619187fdf86a52079e11bc
author Marco Paniconi <marpan@google.com> 1663656307 -0700
committer Marco Paniconi <marpan@google.com> 1663724542 +0000

rtc-screen: Fixes to screen intra mode testing

Adjust the low spatial variance thresholds to allow
for more intra testing, and fix an early exit
to allow H/V intra testing under some conditions.

For low spatial areas that have moved from previous frame,
faint lines can incorectly appear, due to wrong mode
or early exit in intra-testing. This can be seen, for
example, in scroll movement as in the buganizer clip.

The current fix reduces these artfiacts with mimimal
impact on speed.

Stats changed, for speed 10:
avg_psnr/ovr_psnr/ssim, %speedup(IC)
-0.58/-0.67/-1.6, -0.6%

On the screenshare_buganizer clip, where this change
reduce the line artifacts, gain is:
-2.6/-4.6/-9.0, -0.7%
Change-Id: I58a00eabdd83c5fb86685595b194350c1229fd64