ref: d4700731ca4779678cef1b44374b88934e06b947
parent: 04edde2b114da4ac94cea13bbe9a6fe0ed474576
author: Yaowu Xu <yaowu@google.com>
date: Mon Jun 6 12:42:58 EDT 2011
remove redundant functions
The encoder defined about 4 set of similar functions to calculate sum,
variance or sse or a combination of them. This commit removed one set
of these functions, get8x8var and get16x16var, where calls to the later
function are replaced with var16x16 by using the fact on a 16x16 MB:
variance == sse - sum*sum/256
Change-Id: I803eabd1fb3ab177780a40338cbd596dffaed267