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>
Fri, 1 Dec 2017 23:28:59 +0000 (00:28 +0100)
commitb01020a0501aefc6decce15901437d4e03c4bbbf
tree37c6f54bc5d405e24a16eb86472d82006e55c869
parent44dc83f0e07a7bcce135ced249d231c3a7b2fd5d
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