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>
Sat, 30 Dec 2017 20:11:32 +0000 (21:11 +0100)
commit85ea121684a7b128c39373845506e6016daa60cc
treea935768f741ab307684fd6719d6ac0f745c563e6
parent79ec6381151c0db5619555cc2d75988d8f8805f6
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