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ed8ddf0bd3
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Henrik Gramner ed8ddf0bd3 x86inc: Add REPX macro to repeat instructions/operations 
When operating on large blocks of data it's common to repeatedly use
an instruction on multiple registers. Using the REPX macro makes it
easy to quickly write dense code to achieve this without having to
explicitly duplicate the same instruction over and over.

For example,

    REPX {paddw x, m4}, m0, m1, m2, m3
    REPX {mova [r0+16*x], m5}, 0, 1, 2, 3

will expand to

    paddw       m0, m4
    paddw       m1, m4
    paddw       m2, m4
    paddw       m3, m4
    mova [r0+16*0], m5
    mova [r0+16*1], m5
    mova [r0+16*2], m5
    mova [r0+16*3], m5

Commit taken from x264:
6d10612ab0

Signed-off-by: Frank Plowman <post@frankplowman.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
2023-11-08 13:49:08 +01:00
compat configure: Set WIN32_LEAN_AND_MEAN at configure time 2023-08-14 22:57:28 +03:00
doc avcodec: LEAD MCMP decoder 2023-11-08 17:37:58 +11:00
ffbuild ffbuild: Add gzip -n flag to fix reproducible builds 2023-11-05 11:30:13 +01:00
fftools fftools/ffmpeg_mux_init: Restrict disabling automatic copying of metadata 2023-11-02 13:24:21 +01:00
libavcodec avcodec: LEAD MCMP decoder 2023-11-08 17:37:58 +11:00
libavdevice avdevice/android_camera: fix build failure due to typo 2023-11-07 11:10:07 +08:00
libavfilter avfilter/af_adynamicequalizer: do detection of threshold first 2023-11-05 16:00:29 +01:00
libavformat avcodec: LEAD MCMP decoder 2023-11-08 17:37:58 +11:00
libavutil x86inc: Add REPX macro to repeat instructions/operations 2023-11-08 13:49:08 +01:00
libpostproc Bump versions after 6.1 2023-10-29 16:19:14 +01:00
libswresample Bump versions after 6.1 2023-10-29 16:19:14 +01:00
libswscale Bump versions after 6.1 2023-10-29 16:19:14 +01:00
presets
tests lavf/smacker: export sample_aspect_ratio 2023-11-05 11:30:13 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for CSCD 2023-11-01 16:40:21 +01:00
.gitattributes
.gitignore
.mailmap mailmap: remap my email accounts 2023-11-03 20:57:49 +08:00
.travis.yml
Changelog avcodec: LEAD MCMP decoder 2023-11-08 17:37:58 +11:00
configure avcodec: LEAD MCMP decoder 2023-11-08 17:37:58 +11:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as a mediacodec and videotoolbox maintainer 2023-11-08 16:15:04 +08:00
Makefile tools: Don't include the direct library names when linking 2023-10-02 22:49:07 +03:00
README.md
RELEASE

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.