ref: e86670a2af279917397271d6cfe4db2e30fe4693
parent: a665b23a9b8dda71370ad42d71b64628a764d19d
author: Zoe Liu <zoeliu@google.com>
date: Thu Jun 21 12:28:15 EDT 2018
Add extra altref option for hierarchical structure This CL is to hook up the implemented hierarchical structure construction as well as its corresponding bitrate allocation functionality with the defining of a GF group. Currently the hierarchical structure is off by default. Hence this CL has no impact on coding performance. Change-Id: I9e1ddfd877559e99072c23970f7fe103b64ed9ee