commit 4de81ee1f1ff3eee2dbc511c0b3ba94b1a2b4a62
author Angie Chiang <angiebird@google.com> Tue Jul 26 14:14:20 2016 -0700
committer Angie Chiang <angiebird@google.com> Thu Aug 11 11:16:04 2016 -0700
tree 699b7b0ac5af15c8ac178f69e30bdd213df0fb91
parent cdd4eb02915ee41554b8ba0e77e6bc0aca7ed978

Bitstream debug tool

This is a debug tool used to detect bitstream error. On encoder side, it pushes
each bit and probability into a queue before the bit is written into the
Arithmetic coder. On decoder side, whenever a bit is read out from the
Arithmetic coder, it pops up the reference bit and probability from the queue as
well. If the two results do not match, this debug tool will report an error.
This tool can be used to pin down the bitstream error precisely. By combining
gdb's backtrace method, we can detect which module causes the bitstream error.

Change-Id: I133a4371fafdd48c488f2ca47f9e395676c401f2