commit 0ccd79b10b37de17c78f9ad91ed06a29502d7c6d
author Ady Abraham <adyabr@google.com> Wed Jun 10 10:11:17 2020 -0700
committer Ady Abraham <adyabr@google.com> Thu Jun 11 11:17:09 2020 -0700
tree 28b52024cb3e31dd830fa25d23fefdfa1852d727
parent b1b9d41c73cfb388a81a2bc45b0c6708e2e627f7

SurfaceFlinger: stabilize heuristic refresh rate calculation

When calculating layer's refresh rate heuristically, also store
a history of the last refresh rate calculated. We use this list to
determine how consistent is the refresh rate. If the refresh rate is
not consistent, then we keep reporting the last consistent refresh rate
and wait for the refresh rate to stabilize again.

Test: Play at 60fps video in XPlayer
Bug: 157540021

Change-Id: If3b525820d298cc5835dddf73f327501c8a18964