Philippe Gorley authored Sep 18, 2017 and Adrien Béraud committed Sep 20, 2017

Brings many bug fixes, optimizations, and better abstraction of the
hardware decoding API. Removes VDA, as it is no longer supported in
FFmpeg and is deprecated by Apple. Also removes AVF patches; they are
already implemented in FFmpeg.

Change-Id: I15629531ad91296e77c16ec218b2bb6de5a705ba