ref: cfc79a357a4a6c954781d755b786fadf65f46b60
parent: b89ba05ab45cfafaf92a95fda21b9e4c5142db88
author: paulwilkins <paulwilkins@google.com>
date: Wed Feb 15 05:33:10 EST 2017
Disconnect ARF breakout from frame boost. This small change replaces the frame boost check in the arf group length break out clause with a test against a prediction decay value. The boost value is in fact partly dependent on the decay value but this change means that the per frame boost calculation can be adjusted without influencing the group length calculation. The value chosen gives a close match on all the test sets with the previous code (on average) but it was noted that a lower threshold was slightly better for 1080P and up and a slightly higher value for small image sizes. Change-Id: I4d5b9f67d5b17b0d99ea3f796d3d6202fd61ee0c