shithub: libvpx

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ref: 24b16ce7c9da42b23484174a41d1c5ff2ea4929a
parent: 5786379401a93316a95b3e924c8de33c7c538cf9
author: Marco Paniconi <marpan@google.com>
date: Sun Jul 1 13:26:38 EDT 2018

vp9: Fix to screen content artifact for real-time.

Reset segment to base (segment#0) on spatially flat
stationary blocks (source_variance = 0). Also increase
dc_skip threshold for these blocks.

Reduces artifacts on flat areas in screen content mode.

Change-Id: I7ee0c80d37536db7896fa74a83f75799f1dcf73d