commit 8da6d9d75cf7f16d05c760900ab8d4aee2520220
author David Barker <david.barker@argondesign.com> Mon Nov 28 11:13:52 2016 +0000
committer Debargha Mukherjee <debargha@google.com> Mon Nov 28 22:43:38 2016 +0000
tree f4f8fd219dc9eaa4b177bb48ae6fe786ce64c8a7
parent 9e218747c4202bb903423e9dae91b853180e52af

Fix a bug with global-motion + ref-mv

av1_find_mv_refs sets the ALL_ZERO flag when either (a) we don't have
enough candidate MVs, or (b) all candidate MVs are zero. With global
motion enabled, case (b) does not work as intended and causes two
problems: a significant quality decrease for foreman_cif.y4m, and
test failures in *CpuSpeedTest*Screencast*.

This patch skips check (b) when global motion is enabled, fixing
the above bugs.

Change-Id: I7461588cb02733563c1439f430b89190299a1b5d