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Andreas Rheinhardt 8c4f95e1e1 avcodec/hevc_filter: Pass HEVCLocalContext when slice-threading 
The HEVC decoder has both HEVCContext and HEVCLocalContext
structures. The latter is supposed to be the structure
containing the per-slicethread state.

Yet that is not how it is handled in practice: Each HEVCLocalContext
has a unique HEVCContext allocated for it and each of these
coincides with the main HEVCContext except in exactly one field:
The corresponding HEVCLocalContext.
This makes it possible to pass the HEVCContext everywhere where
logically a HEVCLocalContext should be used.

This commit stops doing this for lavc/hevc_filter.c; it also constifies
everything that is possible in order to ensure that no slice thread
accidentally modifies the main HEVCContext state.

There are places where this was not possible, namely with the SAOParams
in sao_filter_CTB() or with sao_pixels_buffer_h in copy_CTB_to_hv().
Both of these instances lead to data races, see
https://fate.ffmpeg.org/report.cgi?time=20220629145651&slot=x86_64-archlinux-gcc-tsan-slices

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-07-25 23:31:37 +02:00
compat avfilter: add chromakey_cuda filter 2022-07-10 17:20:15 +02:00
doc fftools/ffmpeg: move each muxer to a separate thread 2022-07-23 11:53:19 +02:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffmpeg: replace AVFrame.pkt_duration with duration 2022-07-24 08:46:16 +02:00
libavcodec avcodec/hevc_filter: Pass HEVCLocalContext when slice-threading 2022-07-25 23:31:37 +02:00
libavdevice lavd: use AVFrame.duration instead of AVFrame.pkt_duration 2022-07-19 12:27:17 +02:00
libavfilter lavf/dnn: dump OpenVINO model input/output names to OVMdel struct. 2022-07-24 08:38:50 +08:00
libavformat avformat/argo_cvg: expose loop/reverb/checksum via metadata 2022-07-24 19:24:00 +10:00
libavutil lavu/frame: add a duration field to AVFrame 2022-07-19 12:27:17 +02:00
libpostproc Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswresample Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswscale swscale: add NV16 input/output 2022-07-19 12:20:16 +02:00
presets
tests fate/hevc: add clip for persistent_rice_adaptation_enabled_flag 2022-07-25 17:54:16 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for MWSC 2022-07-21 19:27:38 +02:00
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.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
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Changelog fftools/ffmpeg: move each muxer to a separate thread 2022-07-23 11:53:19 +02:00
configure configure: properly require libx264 if enabled 2022-07-24 17:41:21 +03:00
CONTRIBUTING.md
COPYING.GPLv2
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INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as maintainer for LoongArch. 2022-06-08 18:29:30 +02:00
Makefile Makefile: Prompt for reconfigure on lavc/hwaccels.h modification 2022-07-01 00:34:38 +02:00
README.md
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.