ref: a3df343cda2b6f3d554138ce5dae831e2f946d0c
parent: 3c8e04e93928b978dc6df84cf0f77939d7a2e64b
author: Ronald S. Bultje <rsbultje@gmail.com>
date: Tue Sep 8 10:26:42 EDT 2015
vp10: code sign bit before absolute value in non-arithcoded header. For reading, this makes the operation branchless, although it still requires two shifts. For writing, this makes the operation as fast as writing an unsigned value, branchlessly. This is also how other codecs typically code signed, non-arithcoded bitstream elements. See issue 1039. Change-Id: I6a8182cc88a16842fb431688c38f6b52d7f24ead