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589f1e5cc7
Calling a function via a different function pointer type is
undefined behavior (C11, 6.3.2.3 8); two pointer parameters
of different type are not equivalent in this regard, although
it happens to work in practice; the current code relies on this.
This patch brings the code in line with the spec. This fixes the
following FATE-tests when run with Clang-UBSan:
ac3-fixed-encode-2 audiomatch-afconvert-{16000,44100}-mono-he-{adts,m4a}
audiomatch-dolby-44100-mono-he-mp4 filter-metadata-avf-aphase-meter-mono
filter-pan-{downmix1,downmix2,mono2,stereo2,stereo3,stereo4,upmix1,upmix2}
lavf-dv_{pal,ntsc} matroska-encoding-delay
The error was something like
src/libswresample/rematrix.c:621:17: runtime error: call to function sum2_float through pointer to incorrect function type 'void (*)(void *, const void *, const void *, void *, int, int, int)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
- ffplay is a minimalistic multimedia player.
- ffprobe is a simple analysis tool to inspect multimedia content.
- Additional small tools such as
aviocat,ismindexandqt-faststart.
Documentation
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Examples
Coding examples are available in the doc/examples directory.
License
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Contributing
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.