tree c24ec5f1b78a015f26d0a0d876f2cf99ab9d3765
parent 1e30547984e1d80f5b98214efc9f781cbcc85999
author Jingning Han <jingning@google.com> 1407951501 -0700
committer Gerrit Code Review <gerrit@gerrit.golo.chromium.org> 1407964634 -0700

Allow full coeff probability model and cost update

This commit moves the simplified coefficient probability model
and costing update to speed 4, and turns on chessboard pattern
mode search for sub 720p sequences. The overall coding performance
of speed 3 is improved:
derf  0.889%
stdhd 1.744%

The speed 3 runtime for test sequences are improved:
bus cif at 1000 kbps 9823 ms -> 9642 ms
pedestrian 1080p 2000 kbps 189559 ms -> 183284 ms

Change-Id: Iecbc7496a68f31fd49fb09f8dfd97c028d675a5d