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Martin Storsjö 62fac040c8 intreadwrite: Indicate potential aliasing in AV_RN/AV_WN for Clang/MSVC mode 
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>
2023-08-04 21:50:57 +03:00
compat compat: Use '-' instead of '/' for rc.exe options 2023-02-13 13:49:40 +02:00
doc avfilter/avf_showcwt: add iscale option 2023-07-30 18:14:16 +02:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/opt_common: Don't add unnecessary " " 2023-08-02 18:15:34 +02:00
libavcodec avcodec/error_resilience, mpeg12dec: Remove always-true checks 2023-08-04 11:50:34 +02:00
libavdevice lavd/opengl_enc: fix a compiler error 2023-07-24 10:17:51 +08:00
libavfilter avfilter/avfilter: Make functions only used here static 2023-08-04 11:49:26 +02:00
libavformat avformat/flvdec: handle exheader fourcc correctly in metadata 2023-08-03 21:56:00 +02:00
libavutil intreadwrite: Indicate potential aliasing in AV_RN/AV_WN for Clang/MSVC mode 2023-08-04 21:50:57 +03:00
libpostproc version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
libswresample libswresample: Prevent out of bounds. 2023-08-02 17:31:13 +02:00
libswscale swscale/rgb2rgb2: rework RISC-V V shuffle_bytes_{1230,3012} 2023-07-21 22:18:02 +03:00
presets
tests avformat/mov: enable identifying TTML subtitle streams as such 2023-07-28 15:31:56 +03:00
tools tools/target_bsf_fuzzer: fix some filter names 2023-06-29 22:44:11 -03:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml
Changelog avfilter: add transpose_vt for videotoolbox pix_fmt 2023-07-23 11:52:28 +08:00
configure avfilter: add transpose_vt for videotoolbox pix_fmt 2023-07-23 11:52:28 +08:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: change Leo Izen IRC nickname 2023-06-20 12:46:47 -04:00
Makefile tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements 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, ismindex and qt-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.