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764cacfdb6
cfhddata.c initializes a RL VLC table via code tables and corresponding tables for length, run and level. code and length tables are used to initialize a VLC, no symbol table is used. Afterwards the symbols of said VLC are just the indices of the corresponding entries in the code and length table that were used for initialization; they can therefore be used to get the matching level and run entry and they are not used for anything else. Therefore one can just permute these tables without changing the resulting RL VLC tables. This commit does just this. It permutes these tables so that the code tables are ordered from left to right in the resulting tree and then switches to ff_init_vlc_from_lengths(), which allows to remove the codes table altogether. Given that these tables are constructed on the stack, this also reduces stack usage, potentially fixing part of #9399. (The size of the tables on the stack decreases from 4752 to 2640.) Reviewed-by: Paul B Mahol <onemda@gmail.com> 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.