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Frank Barchard b5c764cfdd ARGBBlur AVX2 and NEON64 
Add ComputeCumulativeSumRow_AVX2, CumulativeSumToAverageRow_AVX2,
ComputeCumulativeSumRow_NEON, and CumulativeSumToAverageRow_NEON to
accelerate ARGBBlur and ARGBComputeCumulativeSum on x86_64 and aarch64.
Update ARGBBlurSmall_Opt to benchmark 320x180 with radius 1 and use a
circular cumsum buffer of height radius * 2 + 2 in TestBlur.

ARGBBlurSmall_Opt (320x180, r=1, 10000 iterations):
CPU                       Was C/SSE2    Now AVX2/NEON          Speedup
--------------------  --------------  ---------------  ---------------
Intel Granite Rapids    29 ms (SSE2)     24 ms (AVX2)            1.21x
Intel Emerald Rapids    30 ms (SSE2)     23 ms (AVX2)            1.30x
Intel Sapphire Rapid    32 ms (SSE2)     28 ms (AVX2)            1.14x
Intel Ice Lake          43 ms (SSE2)     34 ms (AVX2)            1.26x
Intel Skylake-X         54 ms (SSE2)     45 ms (AVX2)            1.20x
Intel Haswell           59 ms (SSE2)     54 ms (AVX2)            1.09x
AMD Zen 5               32 ms (SSE2)     19 ms (AVX2)            1.68x
AMD Zen 4               36 ms (SSE2)     26 ms (AVX2)            1.38x
AMD Zen 3               42 ms (SSE2)     28 ms (AVX2)            1.50x
ARM Neoverse-V2           256 ms (C)     40 ms (NEON)            6.40x

ARGBBlur_Opt (1280x720, r=55, 1000 iterations):
CPU                       Was C/SSE2    Now AVX2/NEON          Speedup
--------------------  --------------  ---------------  ---------------
Intel Granite Rapids  1150 ms (SSE2)    984 ms (AVX2)            1.17x
Intel Emerald Rapids  1081 ms (SSE2)    953 ms (AVX2)            1.13x
Intel Sapphire Rapid  1124 ms (SSE2)    973 ms (AVX2)            1.16x
Intel Ice Lake        1450 ms (SSE2)   1167 ms (AVX2)            1.24x
Intel Skylake-X       1935 ms (SSE2)   1630 ms (AVX2)            1.19x
Intel Haswell         2211 ms (SSE2)   1982 ms (AVX2)            1.12x
AMD Zen 5             1089 ms (SSE2)    694 ms (AVX2)            1.57x
AMD Zen 4             1045 ms (SSE2)    929 ms (AVX2)            1.12x
AMD Zen 3             1215 ms (SSE2)    967 ms (AVX2)            1.26x
ARM Neoverse-V2          6529 ms (C)   1544 ms (NEON)            4.23x

Bug: b/456384776
Change-Id: I39c463c791826d3adb05f0b0845b0b1f56f0e4da
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8464496
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: richard winterton <rrwinterton@gmail.com>
2026-09-25 17:28:50 -07:00
build_overrides [vpython] Migrate .vpython3 to vpython.toml 2026-09-18 00:28:26 -07:00
docs convert, scale: Add P010/P210/P410 convert paths and NV16/NV24/Px10 scale 2026-09-23 20:43:22 -07:00
include ARGBBlur AVX2 and NEON64 2026-09-25 17:28:50 -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 ARGBBlur AVX2 and NEON64 2026-09-25 17:28:50 -07:00
tools_libyuv Remove libyuv dependency on base/ 2025-01-08 09:04:21 -08:00
unit_test ARGBBlur AVX2 and NEON64 2026-09-25 17:28:50 -07:00
util [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -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
Android.bp [libyuv] Update build files with missing sources and sort lists 2026-09-03 11:02:07 -07:00
Android.mk [libyuv] Update build files with missing sources and sort lists 2026-09-03 11:02:07 -07:00
AUTHORS Fix same-width vertical point upsampling 2026-08-24 19:28:50 -07:00
BUILD.bazel [libyuv] Use Armv8.5-A architecture flags for SME and SVE2 build targets 2026-09-09 09:17:24 -07:00
BUILD.gn [libyuv] Use Armv8.5-A architecture flags for SME and SVE2 build targets 2026-09-09 09:17:24 -07:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt [libyuv] Use Armv8.5-A architecture flags for SME and SVE2 build targets 2026-09-09 09:17:24 -07:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS [DEPS] Add CPython CIPD package for hermetic Python toolchain 2026-08-19 20:31:30 -07:00
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 GEMINI.md: Update Arm wording and guidance 2026-08-18 11:21:14 -07:00
libyuv.bzl [libyuv] Simplify RVV configuration in BUILD.bazel and libyuv.bzl 2026-09-08 17:50:17 -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 [libyuv] Update build files with missing sources and sort lists 2026-09-03 11:02:07 -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 Remove magjed from OWNERS 2026-08-24 10:43:21 -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 RVV port to inline from intrinsics 2026-09-21 14:26:26 -07:00
README.md Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
vpython.toml [vpython] Migrate .vpython3 to vpython.toml 2026-09-18 00:28:26 -07:00
vpython.toml.uv.lock [vpython] Migrate .vpython3 to vpython.toml 2026-09-18 00:28:26 -07:00
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.