Mark Thompson 0e782661d6 cbs_h264: Fix overflow in shifts ...

The type of the result of a shift operation is unaffected by the type of
the right operand, so some existing code overflows with undefined behaviour
when the element length is 32.  Add a helper macro to calculate the maximum
value correctly and then use it everywhere this pattern appears.

Found-by: Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>

2018-03-18 17:54:55 +00:00

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