coffee/libyuv
1
0
Fork 0
mirror of https://chromium.googlesource.com/libyuv/libyuv synced 2026-06-15 00:16:08 +08:00
Code Issues Packages Projects Releases Wiki Activity
2,967 Commits 4 Branches 0 Tags BSD-3-Clause 72 MiB
C++ 95.2%
C 2.3%
Python 1.6%
Starlark 0.4%
CMake 0.3%
Other 0.1%
Go to file
Frank Barchard 3c5fa6ef27 libyuv] Replace hardcoded RGB to YUV functions with Matrix variants 
Removes non-matrix implementations for RGB24, RAW, RGB565, ARGB1555,
and ARGB4444 conversions. Introduces RGBToYMatrixRow, RGBToUVMatrixRow,
and equivalent functions for 16-bit and 24-bit formats. These functions
utilize a 2-step conversion internally (to ARGB, then to YUV) inside
row_common.cc for C, AVX2, and NEON, allowing the high-level
convert.cc logic to execute in a single pass using ArgbConstants.

Benchmark on Zen4
Test: libyuv_unittest --gtest_filter=*RGB*ToI420*

Was BT.601-only
ARGBToI420_Opt (115 ms)
ARGB4444ToI420_Opt (190 ms)
RGB565ToI420_Opt (194 ms)
ARGB1555ToI420_Opt (207 ms)
RGB24ToI420_Opt (143 ms)
RGBAToI420_Opt (167 ms)
28.07% ARGBToUVMatrixRow_AVX512BW
19.65% ARGBToYMatrixRow_AVX512BW
11.32% RGBAToUVRow_SSSE3
10.24% ARGB1555ToARGBRow_SSE2
 8.56% ARGB4444ToARGBRow_SSE2
 8.47% RGB565ToARGBRow_SSE2
 4.17% RGBAToYRow_AVX512BW
 4.04% RGB24ToARGBRow_AVX512BW

Now Matrix
ARGBToI420_Opt (124 ms)
ARGB4444ToI420_Opt (287 ms)
RGB565ToI420_Opt (292 ms)
ARGB1555ToI420_Opt (324 ms)
RGB24ToI420_Opt (236 ms)
RGBAToI420_Opt (126 ms)
29.74% ARGBToUVMatrixRow_AVX2
14.58% ARGB1555ToARGBRow_SSE2
12.59% RGB565ToARGBRow_SSE2
11.32% ARGB4444ToARGBRow_SSE2
 9.35% ARGBToYMatrixRow_AVX2
 8.45% RGB24ToARGBRow_SSSE3
 5.56% ARGBToYMatrixRow_AVX512BW
 1.37% ARGBToUVMatrixRow_Any_AVX2
 0.74% ARGBToYMatrixRow_Any_AVX2
 0.49% ARGB4444ToARGBRow_Any_SSE2
 0.46% RGB565ToARGBRow_Any_SSE2
 0.39% ARGB1555ToARGBRow_Any_SSE2
 0.28% RGB24ToARGBRow_Any_SSSE3
 0.11% ARGB4444ToYMatrixRow_AVX2
 0.09% RGB565ToUVMatrixRow_AVX2
 0.09% RGB565ToYMatrixRow_AVX2
 0.07% RGBToYMatrixRow_AVX2
 0.05% ARGB1555ToUVMatrixRow_AVX2
 0.04% ARGB1555ToYMatrixRow_AVX2
 0.03% RGBToUVMatrixRow_AVX2
 0.02% ARGB4444ToUVMatrixRow_AVX2

Bug: libyuv:508639302
Change-Id: I362c0cfe4c86ee1f3ffb569fa4f784b84148f11a
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/7891045
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: richard winterton <rrwinterton@gmail.com>
2026-06-01 14:04:07 -07:00
build_overrides [tracing] Remove enable_base_tracing 2025-05-15 01:22:38 -07:00
docs Mirrow AVX2 functions for Visual C 2026-05-15 15:05:31 -07:00
include libyuv] Replace hardcoded RGB to YUV functions with Matrix variants 2026-06-01 14:04:07 -07:00
infra/config Use default xcode version in libyuv 2025-11-24 07:54:14 -08:00
riscv_script Support RVV v0.12 intrinsics for row_rvv.cc & scale_rvv.cc 2024-06-17 18:01:49 +00:00
source libyuv] Replace hardcoded RGB to YUV functions with Matrix variants 2026-06-01 14:04:07 -07:00
tools_libyuv Remove libyuv dependency on base/ 2025-01-08 09:04:21 -08:00
unit_test [libyuv] Fix security vulnerabilities in ScalePlane and ARGBAffineRow_C 2026-05-29 18:30:38 -07:00
util Experimental SVE FMMLA detect 2025-10-27 14:34:55 -07:00
.clang-format clang-format libyuv 2016-11-07 17:37:23 -08:00
.gitignore DetilePlane and unittest for NEON 2022-01-31 20:05:55 +00:00
.gn Set use_siso=true by default in .gn 2025-06-23 23:50:32 -07:00
.vpython3 [libyuv] Bump vpython from 3.8 to 3.11 2025-09-03 12:22:19 -07:00
Android.bp Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
Android.mk Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
AUTHORS [DEPS] Remove cleanup_links pre_deps_hooks 2024-04-08 15:47:48 +00:00
BUILD.bazel Add Bazel build support 2026-04-15 18:20:26 -07:00
BUILD.gn Stop setting --dynamic-linker for target_os="android" 2026-05-27 04:34:07 -07:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS Roll chromium_revision 30d4d9c779..2fec1883d8 (1554090:1584384) 2026-02-12 23:42:06 -08:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-09 19:34:43 +00:00
download_vs_toolchain.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
GEMINI.md Mirrow AVX2 functions for Visual C 2026-05-15 15:05:31 -07:00
libyuv.bzl Add Bazel build support 2026-04-15 18:20:26 -07:00
libyuv.gni row_win.cc rewrite into intrinsics 2026-04-15 19:53:16 -07:00
libyuv.gyp Stop setting --dynamic-linker for target_os="android" 2026-05-27 04:34:07 -07:00
libyuv.gypi Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
OWNERS row_win.cc rewrite into intrinsics 2026-04-15 19:53:16 -07:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
public.mk use unix line endings 2018-06-20 23:19:59 +00:00
pylintrc Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
README.chromium libyuv] Replace hardcoded RGB to YUV functions with Matrix variants 2026-06-01 14:04:07 -07:00
README.md Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
winarm.mk NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00
WORKSPACE.bazel Add Bazel build support 2026-04-15 18:20:26 -07:00

README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon/SVE2/SME on Arm.
  • Optimized for MSA on Mips.
  • Optimized for RVV on RISC-V.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.