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Andreas Rheinhardt 7bf9c1e3f6 avcodec/x86/vvc/mc: Avoid redundant clipping for 8bit 
It is already done by packuswb.

Old benchmarks:
avg_8_2x2_c:                                            11.1 ( 1.00x)
avg_8_2x2_avx2:                                          8.6 ( 1.28x)
avg_8_4x4_c:                                            30.0 ( 1.00x)
avg_8_4x4_avx2:                                         10.8 ( 2.78x)
avg_8_8x8_c:                                           132.0 ( 1.00x)
avg_8_8x8_avx2:                                         25.7 ( 5.14x)
avg_8_16x16_c:                                         254.6 ( 1.00x)
avg_8_16x16_avx2:                                       33.2 ( 7.67x)
avg_8_32x32_c:                                         897.5 ( 1.00x)
avg_8_32x32_avx2:                                      115.6 ( 7.76x)
avg_8_64x64_c:                                        3316.9 ( 1.00x)
avg_8_64x64_avx2:                                      626.5 ( 5.29x)
avg_8_128x128_c:                                     12973.6 ( 1.00x)
avg_8_128x128_avx2:                                   1914.0 ( 6.78x)
w_avg_8_2x2_c:                                          16.7 ( 1.00x)
w_avg_8_2x2_avx2:                                       14.4 ( 1.16x)
w_avg_8_4x4_c:                                          48.2 ( 1.00x)
w_avg_8_4x4_avx2:                                       16.5 ( 2.92x)
w_avg_8_8x8_c:                                         168.1 ( 1.00x)
w_avg_8_8x8_avx2:                                       49.7 ( 3.38x)
w_avg_8_16x16_c:                                       392.4 ( 1.00x)
w_avg_8_16x16_avx2:                                     61.1 ( 6.43x)
w_avg_8_32x32_c:                                      1455.3 ( 1.00x)
w_avg_8_32x32_avx2:                                    224.6 ( 6.48x)
w_avg_8_64x64_c:                                      5632.1 ( 1.00x)
w_avg_8_64x64_avx2:                                    896.9 ( 6.28x)
w_avg_8_128x128_c:                                   22136.3 ( 1.00x)
w_avg_8_128x128_avx2:                                 3626.7 ( 6.10x)

New benchmarks:
avg_8_2x2_c:                                            12.3 ( 1.00x)
avg_8_2x2_avx2:                                          8.1 ( 1.52x)
avg_8_4x4_c:                                            30.3 ( 1.00x)
avg_8_4x4_avx2:                                         11.3 ( 2.67x)
avg_8_8x8_c:                                           131.8 ( 1.00x)
avg_8_8x8_avx2:                                         21.3 ( 6.20x)
avg_8_16x16_c:                                         255.0 ( 1.00x)
avg_8_16x16_avx2:                                       30.6 ( 8.33x)
avg_8_32x32_c:                                         898.5 ( 1.00x)
avg_8_32x32_avx2:                                      104.9 ( 8.57x)
avg_8_64x64_c:                                        3317.7 ( 1.00x)
avg_8_64x64_avx2:                                      540.9 ( 6.13x)
avg_8_128x128_c:                                     12986.5 ( 1.00x)
avg_8_128x128_avx2:                                   1663.4 ( 7.81x)
w_avg_8_2x2_c:                                          16.8 ( 1.00x)
w_avg_8_2x2_avx2:                                       13.9 ( 1.21x)
w_avg_8_4x4_c:                                          48.2 ( 1.00x)
w_avg_8_4x4_avx2:                                       16.2 ( 2.98x)
w_avg_8_8x8_c:                                         168.6 ( 1.00x)
w_avg_8_8x8_avx2:                                       46.3 ( 3.64x)
w_avg_8_16x16_c:                                       392.4 ( 1.00x)
w_avg_8_16x16_avx2:                                     57.7 ( 6.80x)
w_avg_8_32x32_c:                                      1454.6 ( 1.00x)
w_avg_8_32x32_avx2:                                    214.6 ( 6.78x)
w_avg_8_64x64_c:                                      5638.4 ( 1.00x)
w_avg_8_64x64_avx2:                                    875.6 ( 6.44x)
w_avg_8_128x128_c:                                   22133.5 ( 1.00x)
w_avg_8_128x128_avx2:                                 3334.3 ( 6.64x)

Also saves 550B of .text here. The improvements will likely
be even better on Win64, because it avoids using two nonvolatile
registers in the weighted average case.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2026-02-22 00:57:56 +01:00
.forgejo .forgejo/workflows: Test hardcoded tables 2026-02-14 20:15:13 +01:00
compat compat: Fix .def file generation for ARM64EC builds on Windows 2025-12-19 10:01:16 +00:00
doc avformat: Bump version and add APIChanges entry 2026-02-21 20:03:52 +01:00
ffbuild vulkan: support shader compression 2026-01-12 17:28:41 +01:00
fftools fftools/ffmpeg_opt: limit recursion of presets 2026-02-17 13:41:37 +00:00
libavcodec avcodec/x86/vvc/mc: Avoid redundant clipping for 8bit 2026-02-22 00:57:56 +01:00
libavdevice avdevice/gdigrab: suppress int to pointer cast warning 2025-12-03 23:45:44 +00:00
libavfilter avfilter/af_loudnorm: Avoid unchecked allocation 2026-02-20 20:35:16 +01:00
libavformat avformat/hlsenc: Return error upon error, fix shadowing 2026-02-22 00:23:00 +01:00
libavutil avutil/attributes_internal: Add attribute_nonstring 2026-02-20 11:59:37 +01:00
libswresample swresample: Check ch layouts in swr_alloc_set_opts2() 2026-02-15 20:16:12 +01:00
libswscale swscale/ops_optimizer: add sanity checks to scale->expand conversion 2026-02-21 11:47:43 +00:00
presets
tests avcodec/jpeglsdec: fix decoding of jpegls files with restart markers 2026-02-20 16:32:10 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for JV 2026-02-18 08:18:44 +00:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore vulkan: support shader compression 2026-01-12 17:28:41 +01:00
.mailmap mailmap: add entry for myself 2025-08-08 21:51:15 +00:00
Changelog avfilter: d3d12 motion estimation filter support 2026-01-26 11:31:48 +00:00
configure configure: Enable -Wunterminated-string-initialization warning 2026-02-20 11:59:37 +01:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: fix whitespace/new-line issues 2025-08-03 13:48:47 +02:00
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
FUNDING.json Add FUNDING.json 2025-06-23 14:48:40 +02:00
INSTALL.md all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: add myself as whip maintainer 2026-01-11 04:24:55 +00:00
Makefile Makefile: add missing vpath for glsl/spv 2026-01-12 19:18:36 +01:00
README.md
RELEASE RELEASE: update to 8.0 2025-08-14 08:42:29 -04:00

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.