ref: afc8c4836fa711501f81a6d54cf0ffa49a2fb99f
parent: 72746c079d0b8631dad90f7c172ae19193405571
author: Jerome Jiang <jianj@google.com>
date: Wed Jan 4 11:19:42 EST 2017
vp9: Compute source sad for every superblock when partition copy is on. The source sad could be used to copy the partition without going into choose_partitioning function to speed up vp9 encoding. Computing source sad takes little time. Speed test on Android and Linux shows little encoding time gain (less than 1.4%). Turned off for now since partition copy is turned off. Change-Id: I61c9d5b8f22329760cb29a4ee30a7f9c232ce8d3