FFmpeg/libavcodec
Mark Thompson a1b6a6907b
cbs_av1: Reject thirty-two zero bits in uvlc code
The spec allows at least thirty-two zero bits followed by a one to mean
2^32-1, with no constraint on the number of zeroes.  The libaom
reference decoder does not match this, instead reading thirty-two zeroes
but not the following one to mean 2^32-1.  These two interpretations are
incompatible and other implementations may follow one or the other.
Therefore reject thirty-two zeroes because the intended behaviour is not
clear.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7110a36ba07f85ca2996d3b99898a4819e72d9bb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2024-07-24 16:52:31 +02:00
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