tree bd0adf6b0b398dc8a26943c5c6c22b0ba2f30603
parent 878e676ff9b7da111719b07ba11a8c0f17ca930f
author Wan-Teh Chang <wtc@google.com> 1538506207 -0700
committer Wan-Teh Chang <wtc@google.com> 1538694754 +0000

Add comments and assertions to swap_frame_buffers.

Add a comment to describe how swap_frame_buffers() report failure.

Add assertions to swap_frame_buffers() to assert the assumptions it
makes.

Document the current meaning of pbi->hold_ref_buf.

BUG=aomedia:2179

Change-Id: Idc3d14f7e52e6d2ff645bfc6f63914429afa57cc