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Frank Barchard 20b0a91bc1 Transpose 16x16 for AVX2 
- TransposeWx16_AVX2 and TransposeUVWx16_AVX2 using 2 lanes of 8 ymm
  registers, with Any for tail.
- Move TransposeUVWx16_C to rotate_common.cc and pass the C function to
  TUVANY, so the LSX 16 row Any version transposes all 16 rows.

I420Rotate90_Opt (LIBYUV_WIDTH=1279 LIBYUV_HEIGHT=719 LIBYUV_REPEAT=1000):
CPU                      SSSE3   AVX2  AVX512  AVX2 x   512 x
Intel Haswell             1812    916     945   1.98x   1.92x
AMD Milan (Zen 3)          177    118     118   1.50x   1.50x
Intel Granite Rapids       245    186     186   1.32x   1.32x
Intel Emerald Rapids       246    193     176   1.27x   1.40x
Intel Sapphire Rapids      278    233     225   1.19x   1.24x
Intel Ice Lake             308    213     221   1.45x   1.39x
Intel Skylake-X            365    267     246   1.37x   1.48x
AMD Turin (Zen 5)          106     75      75   1.41x   1.41x
AMD Genoa (Zen 4)          149     98      93   1.52x   1.60x
AMD Venice (Zen 6)         106     74      73   1.43x   1.45x

NV12Rotate90_Opt (LIBYUV_WIDTH=1279 LIBYUV_HEIGHT=719 LIBYUV_REPEAT=1000):
CPU                      SSSE3   AVX2  AVX512  AVX2 x   512 x
Intel Haswell             1771    963     935   1.84x   1.89x
AMD Milan (Zen 3)          173    118     118   1.47x   1.47x
Intel Granite Rapids       275    189     186   1.46x   1.48x
Intel Emerald Rapids       256    188     179   1.36x   1.43x
Intel Sapphire Rapids      286    232     218   1.23x   1.31x
Intel Ice Lake             309    208     218   1.49x   1.42x
Intel Skylake-X            380    269     251   1.41x   1.51x
AMD Turin (Zen 5)          112     74      73   1.51x   1.53x
AMD Genoa (Zen 4)          146     97      93   1.51x   1.57x
AMD Venice (Zen 6)         114     73      72   1.56x   1.58x

Bug: None
Change-Id: Ia89219e3336f39a817aa662e1452824d781664a3
TAG=agy
CONV=bea53b37-b2bf-46fa-9e44-a708b438fabc
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8489456
Reviewed-by: richard winterton <rrwinterton@gmail.com>
2026-10-01 17:31:33 -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 Transpose 16x16 for AVX2 2026-10-01 17:31:33 -07:00
infra/config
riscv_script [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -07:00
source Transpose 16x16 for AVX2 2026-10-01 17:31:33 -07:00
tools_libyuv
unit_test [libyuv] Enable LIBYUV_ENABLE_ROWWIN and MSAN_MEMSET for MSan builds 2026-09-28 10:49:58 -07:00
util [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -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 [build] Use hermetic python3 for script_executable in .gn 2026-09-28 06:02:39 -07:00
Android.bp
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] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -07:00
BUILD.gn [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -07:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -07:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS [build] Use hermetic python3 for script_executable in .gn 2026-09-28 06:02:39 -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
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 [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -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
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 ARGBToRGB24 AVX512 with tail masking 2026-09-29 16:15:44 -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
winarm.mk NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00
WORKSPACE.bazel

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.