commit | eb892918778164ff0b7a398954109e5fc5bf8872 | [log] [tgz] |
---|---|---|
author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | Sun Sep 15 22:01:20 2019 +0200 |
committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | Fri Jul 03 14:13:50 2020 +0200 |
tree | bc720ad8d5449b2189cecabb37943185ec45b635 | |
parent | 25a0887c5a1d4e2cc4d84ddeabdfd7dc26a69786 [diff] |
avcodec/ttaenc: Fix undefined shift ttaenc contained (1 << unary) - 1 as an argument for a function expecting an unsigned int. unary can be as big as 31 in this case. The type of the shift and the whole expression is int, because 1 fits into an integer, so that the behaviour is undefined if unary == 31 as the result of the shift can't be represented in an int §. Subtraction by 1 (which makes the result of the whole expression representable in an int) doesn't change that this is undefined (it usually leads to signed integer overflow which is undefined, too). The solution is simple: Make 1 unsigned to change the type of the whole expression to unsigned int (as the function expects anyway). Fixes ticket #8153. §: This of course presupposes the common int range of -2^31..2^31-1 Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 3ab488a5407f833ecc66e8fa4c537dc4852db720) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
libavcodec
provides implementation of a wider range of codecs.libavformat
implements streaming protocols, container formats and basic I/O access.libavutil
includes hashers, decompressors and miscellaneous utility functions.libavfilter
provides a mean to alter decoded Audio and Video through chain of filters.libavdevice
provides an abstraction to access capture and playback devices.libswresample
implements audio mixing and resampling routines.libswscale
implements color conversion and scaling routines.aviocat
, ismindex
and qt-faststart
.The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Coding examples are available in the doc/examples directory.
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Patches should be submitted to the ffmpeg-devel mailing list using git format-patch
or git send-email
. Github pull requests should be avoided because they are not part of our review process and will be ignored.