ref: 4f0b2d17e5169325ab2d5f2cd74765269631bb80
parent: 87471b6501e3a6d7279316292f008bb3c58388d8
author: xiaotianshi2 <xiaotianshimail2@gmail.com>
date: Sun Jul 19 13:45:29 EDT 2020
fix issue 3269: Boundary strength is incorrect for P16x16 in B-Frame.