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Rémi Denis-Courmont 0c0a3deb18 lavu/cpu: CPU flags for the RISC-V Vector extension 
RVV defines a total of 12 different extensions, including:

- 5 different instruction subsets:
  - Zve32x: 8-, 16- and 32-bit integers,
  - Zve32f: Zve32x plus single precision floats,
  - Zve64x: Zve32x plus 64-bit integers,
  - Zve64f: Zve32f plus Zve64x,
  - Zve64d: Zve64f plus double precision floats.

- 6 different vector lengths:
  - Zvl32b (embedded only),
  - Zvl64b (embedded only),
  - Zvl128b,
  - Zvl256b,
  - Zvl512b,
  - Zvl1024b,

- and the V extension proper: equivalent to Zve64f and Zvl128b.

In total, there are 6 different possible sets of supported instructions
(including the empty set), but for convenience we allocate one bit for
each type sets: up-to-32-bit ints (RVV_I32), floats (RVV_F32),
64-bit ints (RVV_I64) and doubles (RVV_F64).

Whence the vector size is needed, it can be retrieved by reading the
unprivileged read-only vlenb CSR. This should probably be a separate
helper macro if needed at a later point.
2022-09-27 13:19:52 +02:00
compat
compat/cuda: switch from powf to __powf intrinsic
2022-09-03 20:27:34 +02:00
doc
avcodec/avcodec: Deprecate lavc chroma pos API functions
2022-09-26 03:02:49 +02:00
ffbuild
ffbuild/common: Fix CPPFLAGS applied for compiling C++ files
2022-05-24 21:30:52 +02:00
fftools
fftools/ffmpeg_filter: configure min_hard_comp unconditionally
2022-09-23 19:58:08 +08:00
libavcodec
lavc/pixblockdsp: RISC-V I get_pixels
2022-09-27 13:19:52 +02:00
libavdevice
avformat/internal: Don't include avcodec.h
2022-09-26 03:02:50 +02:00
libavfilter
avfilter/scale_eval: Reduce rounding error.
2022-09-27 00:07:43 +02:00
libavformat
avformat/internal: Don't include avcodec.h
2022-09-26 03:02:50 +02:00
libavutil
lavu/cpu: CPU flags for the RISC-V Vector extension
2022-09-27 13:19:52 +02:00
libpostproc
configure: always enable gnu_windres if available
2022-08-13 14:42:36 +02:00
libswresample
swsresample/swresample: error out on invalid layouts
2022-09-14 09:52:33 -03:00
libswscale
swscale/output: Don't call av_pix_fmt_desc_get() in a loop
2022-09-19 23:40:41 +02:00
presets
…
tests
lavu/cpu: CPU flags for the RISC-V Vector extension
2022-09-27 13:19:52 +02:00
tools
tools/target_dec_fuzzer: Adjust threshold for Jpeg2000
2022-09-16 21:30:59 +02:00
.gitattributes
…
.gitignore
gitignore: add config_components.h
2022-03-17 18:35:41 -03:00
.mailmap
mailmap: add entry for myself
2021-03-09 02:09:55 +00:00
.travis.yml
Merge commit '899ee03088d55152a48830df0899887f055da1de'
2019-03-14 15:53:16 -03:00
Changelog
avformat: add APAC demuxer
2022-09-23 20:27:35 +02:00
configure
configure: Remove obsolete APTX decoder dependencies
2022-09-18 22:43:47 +02:00
CONTRIBUTING.md
…
COPYING.GPLv2
…
COPYING.GPLv3
…
COPYING.LGPLv2.1
…
COPYING.LGPLv3
…
CREDITS
…
INSTALL.md
…
LICENSE.md
avfilter/vf_geq: Relicense to LGPL
2019-12-28 11:20:48 +01:00
MAINTAINERS
MAINTAINERS: remove the project leader section
2022-09-23 16:06:11 +02:00
Makefile
Makefile: Prompt for reconfigure on lavc/hwaccels.h modification
2022-07-01 00:34:38 +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.

Description
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