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The Solaris and Windows emulations of atomic_compare_exchange_strong() need typecasts to avoid compiler warnings, because the functions they call expect a void* pointer but an intptr_t integer is passed. Note that the emulations of atomic_compare_exchange_strong() (except the gcc version) only work for atomic_intptr_t because of the type of the second argument (|expected|). See http://en.cppreference.com/w/c/atomic: _Bool atomic_compare_exchange_strong( volatile A* obj, C* expected, C desired ); The types of the first argument and second argument are different (|A| and |C|, respectively). |C| is the non-atomic type corresponding to |A|. In the emulations of atomic_compare_exchange_strong(), |C| is intptr_t. This implies |A| can only be sig_intptr_t. Signed-off-by: Wan-Teh Chang <wtc@google.com>
Libav
Libav 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 a mean to alter decoded Audio and Video through chain of filters.libavdeviceprovides an abstraction to access capture and playback devices.libavresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- avconv is a command line toolbox to manipulate, convert and stream multimedia content.
- avplay is a minimalistic multimedia player.
- avprobe is a simple analisys 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
Conding examples are available in the doc/example directory.
License
Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.