Philippe Gorley authored Jan 30, 2019 and Adrien Béraud committed Mar 06, 2019

Rewrites the hardware decoding system with C++-style code instead of
C-style.

Removes support for hardware decoding h263, as we do not use the h263p
decoder, which is the codec with hardware support.

Change-Id: I96b796ba8847dadd388c6e29eaee1115b25c2fb3