ref: b56b8725fc0928f5295d2a38776766c7e60c0fad
parent: aed7b2316c03d17904ba13374b62209df2953f72
author: Sijia Chen <sijchen@cisco.com>
date: Thu Nov 13 08:56:58 EST 2014
add total length in encoder output and complete most of the statistis calculation