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Given that there are actually ASM functions of this type, one can't simply remove the ff_ prefix from the definitions and declare them as static. Yet one can do nearly that if one keeps the ff_ prefix and removes the declarations for the (now static) functions defined in dsp_init.c from hevcdsp.h and if one defines the functions in the correct order (smaller width first) so that no forward declarations are necessary (which was already true). The new declarations avoid nested macros to simplify things. It nevertheless turned out to be beneficial line-wise. (It would be possible to avoid most of these declarations: It is legal to repeat a function declaration without static if the first declaration declared a function as static. So if the macros simply declared all the functions that they call, one could avoid declarations for the functions that are called. While this is legal C, it unfortuntaly clashes with GCC's -Wredundant-decls (which configure enables) and it is also ugly, as these macro definitions would provide declarations used in ff_hevc_dsp_init_x86().) 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.