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sunyuechi 5bc3b7f513 lavc/rv40dsp: R-V V chroma_mc 
This is similar to h264, but here we use manual_avg instead of vaaddu
because rv40's OP differs from h264. If we use vaaddu,
rv40 would need to repeatedly switch between vxrm=0 and vxrm=2,
and switching vxrm is very slow.

C908:
avg_chroma_mc4_c: 2330.0
avg_chroma_mc4_rvv_i32: 602.7
avg_chroma_mc8_c: 1211.0
avg_chroma_mc8_rvv_i32: 602.7
put_chroma_mc4_c: 1825.0
put_chroma_mc4_rvv_i32: 414.7
put_chroma_mc8_c: 932.0
put_chroma_mc8_rvv_i32: 414.7

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
2024-05-03 18:00:53 +03:00
compat avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
doc avfilter/scale2ref: deprecate in favor of scale=rw:rh 2024-05-03 14:23:23 +02:00
ffbuild ffbuild/libversion.sh: add shebang 2024-04-09 15:34:53 +02:00
fftools fftools/ffmpeg_filter: Fix check 2024-04-27 17:00:12 +02:00
libavcodec lavc/rv40dsp: R-V V chroma_mc 2024-05-03 18:00:53 +03:00
libavdevice avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libavfilter avfilter/scale2ref: deprecate in favor of scale=rw:rh 2024-05-03 14:23:23 +02:00
libavformat avformat/iamfdec: check nb_streams in header read 2024-05-01 02:57:12 +02:00
libavutil lavu/opt: Clarify the scope of AVOptions 2024-05-01 02:57:13 +02:00
libpostproc avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswresample avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswscale swscale: [LA] Optimize swscale funcs in input.c 2024-04-11 23:53:59 +02:00
presets
tests checkasm/rv40dsp: add chroma_mc test 2024-05-03 18:00:53 +03:00
tools tools: add target_enc_fuzzer.c 2024-04-24 02:52:16 +02:00
.gitattributes lavf/assenc: normalize line endings to \n 2024-02-11 17:01:07 -08:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap .mailmap: Update my mailmap entry 2024-02-23 00:17:21 +01:00
Changelog avfilter/scale2ref: deprecate in favor of scale=rw:rh 2024-05-03 14:23:23 +02:00
configure avcodec/libx264: bump minimum required version to 155 2024-05-02 12:12:49 +02:00
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 INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add myself as dvdvideo demuxer, rcwt muxer maintainer 2024-03-10 15:21:23 +01:00
Makefile tools: add target_enc_fuzzer.c 2024-04-24 02:52:16 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 7.0 branch 2024-04-02 13:02:39 -03:00

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.