tree 13e825a4e34475441f9cff49a54cbeb47c3666b4
parent 9f900a1c6404464edd23d2d43a3ab1f390ec8af7
author Deb Mukherjee <debargha@google.com> 1332973185 -0700
committer Deb Mukherjee <debargha@google.com> 1333035542 -0700

Bug fix in probability update savings computation

Found this bug while tracking down some anomalies in my experiments.
Since vp8_cost_one and vp8_cost_zero return unsigned int, the
bit shift by 8 will be incorrect if the value is negative.
I am cautiously optimistic that this fix will make the prob
updates more correct and somewhat improve results across the board.
But the update probabilities will need to be retuned I think.

Patch 2: Adding more of the same fixes using a macro.

Change-Id: I1a168f040e74e8c67e7225103b1c2af9a611da49