tree 685149d6c18d2eff09321ede737b9e334a9254c5
parent 4ab23f9ee9f9cddc011770cee7135d41dff82a1c
author Urvang Joshi <urvang@google.com> 1541459311 -0800
committer Urvang Joshi <urvang@google.com> 1541542169 +0000

Introduce an enum for reference types.

The related #defines are combined into an enum.
Also, we use the earlier typedef 'MV_REFERENCE_FRAME' as the name of
this enum.

BUG=aomedia:2230

Change-Id: I460642d173baa86f6f69410d5cdfa7e223fbd4c3