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Rémi Denis-Courmont 04d092e7d5 lavc/audiodsp: RISC-V F vector_clipf 
RV64G supports MIN & MAX instructions natively only on floating point
registers, not general purpose ones. The later would require the Zbb
extension. Due to that, it is actually faster to perform the clipping
"properly" in FPU.

Benchmarks on SiFive U74-MC (courtesy of Shanghai StarFive Tech):
audiodsp.vector_clipf_c: 29551.5
audiodsp.vector_clipf_rvf: 17871.0

Also tried unrolling with 2 or 8 elements but it gets worse either way.
 		2022-09-27 13:19:52 +02:00
compat
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doc avcodec/avcodec: Deprecate lavc chroma pos API functions 2022-09-26 03:02:49 +02:00
ffbuild
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fftools
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libavcodec lavc/audiodsp: RISC-V F vector_clipf 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/riscv: initial common header for assembler macros 2022-09-27 13:19:52 +02:00
libpostproc
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libswresample
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libswscale
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presets
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tests lavu/cpu: detect RISC-V base extensions 2022-09-27 13:19:52 +02:00
tools
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COPYING.GPLv2
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COPYING.GPLv3
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CREDITS
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Changelog avformat: add APAC demuxer 2022-09-23 20:27:35 +02:00
INSTALL.md
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LICENSE.md
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MAINTAINERS MAINTAINERS: remove the project leader section 2022-09-23 16:06:11 +02:00
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README.md
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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.