avformat/utils: Prevent undefined shift with wrap_bits > 64.
authorDale Curtis <dalecurtis@chromium.org>
Fri, 17 Nov 2017 21:35:56 +0000 (13:35 -0800)
committerMichael Niedermayer <michael@niedermayer.cc>
Thu, 7 Dec 2017 22:38:06 +0000 (23:38 +0100)
commit36db62ca984b0b77b9fe119f47f0a4caaaaa6e75
tree5f7cb82db693c6c3b78af4590126c1fee2f6ff12
parent17f05ff656ff39445c77e15f0dcd80c42ce24727
avformat/utils: Prevent undefined shift with wrap_bits > 64.

2LL << (wrap_bits=64 - 1) does not fit in int64_t; change the
code to use a uint64_t (2ULL) and add an av_assert2() to
ensure wrap_bits <= 64.

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 03fbc0daa7e37af024f8b017a28105c32bbe25ca)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavformat/utils.c