6c694074e1
Only include it if it is needed, namely if __MMX__ is undefined. X86 is currently the only arch where lavu/cpu.h is basically automatically included (for internal development): #if ARCH_X86 is true, lavu/internal.h (which is basically included everywhere) includes lavu/x86/emms.h which can mask missing inclusions of lavu/cpu.h if the developer works on x86/x64. This has happened in 8e825ec3ab09d877f12dcf05d76902a8bb9c8b11 and also earlier (see 6d2365882f281f9452b31b91edb2e6a2d4f5ff08). By including said header only if necessary ordinary developer machines will behave like non-x86 arches, so that missing inclusions of cpu.h won't go unnoticed any more. 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.