commit 67cf8908bc76a94ac4189c71c58aca010b1d6388
author Jingning Han <jingning@google.com> Fri Jan 15 09:05:51 2016 -0800
committer Jingning Han <jingning@google.com> Tue Feb 02 15:15:40 2016 -0800
tree ffc0512f8e730d727ced2e6ebee4ef717ae29267
parent 331b029590e39f0a29e4eb968830827742f12010

Enable adaptive motion vector referencing mode

This commit allows an adaptive motion vector referencing mode
approach. It checks the available reference motion vector candidate
list and decides the amount of motion vector referencing modes. The
current implementation assumes simple binary coding for the syntax.

The compression performance is improved by
derf   0.11%
hevcmr 0.38%
stdhd  0.09%
hevchr 0.23%

The coding gains due to the new reference motion vector system are
derf   1.0%
hevcmr 1.7%
stdhd  1.4%
hevchr 1.3%

Change-Id: Idf932fc373546fe59c8741f1b933ff656e8dbc3f