62fac040c8
Use the GCC specific codepath for Clang in MSVC mode too. This matches the condition used in a number of other places. MSVC doesn't have a way to signal potential aliasing, while GCC (and Clang) can use __attribute__((may_alias)) for this purpose. When building with Clang in MSVC mode, __GNUC__ isn't defined but _MSC_VER is as Clang primarily impersonates MSVC - but even then it does support the GCC style attributes. The GCC specific codepath uses av_alias, which expands to the may_alias attribute if supported. The MSVC specific codepath doesn't use av_alias so far (as MSVC doesn't support any corresponding attribute). This fixes a couple HEVC decoder tests when built with Clang 14 or newer in MSVC mode (with issues observed on all of x86_64, armv7 and aarch64). Signed-off-by: Martin Storsjö <martin@martin.st>
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.