libyuv

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Frank Barchard f506767c5f [libyuv] Fix HAS_ macros for MergeRGBRow, HalfFloatRow Fix two HAS_ macro issues in include/libyuv/row.h found while auditing row function SIMD coverage across all architectures: 1. Add missing HAS_MERGERGBROW_NEON so MergeRGBRow_NEON and MergeRGBRow_Any_NEON in row_neon.cc / row_neon64.cc are enabled and dispatched by MergeRGBPlane on 32-bit and 64-bit ARM. 2. Add missing HAS_HALFFLOATROW_LSX and HAS_HALFFLOATROW_LASX so HalfFloatRow_LSX, HalfFloatRow_Any_LSX, HalfFloatRow_LASX, and HalfFloatRow_Any_LASX in row_lsx.cc / row_lasx.cc are enabled and dispatched by HalfFloatPlane on LoongArch. Maximum SIMD ISA supported per C row function: ------------------------------------------------------------------------ C Row Function arm x86 riscv wasm loongson hexagon ------------------------------------------------------------------------ AB64ToARGBRow_C NEON AVX2 RVV - - HVX ABGRToAR30Row_C NEON AVX512BW - - - - ABGRToUVJRow_C - - - - - - ABGRToUVRow_C - - - - - - ABGRToYJRow_C DOTPROD SSSE3 - - - - ABGRToYRow_C DOTPROD - - - - - AR30ToAB30Row_C - AVX512BW - - - - AR30ToABGRRow_C - AVX512BW - - - - AR30ToARGBRow_C - AVX512BW - - - - AR64ShuffleRow_C NEON AVX512BW RVV WASMSIMD - - AR64ToAB64Row_C NEON AVX512BW RVV WASMSIMD - HVX AR64ToARGBRow_C NEON AVX2 RVV - - HVX ARGB1555ToARGBRow_C SVE2 AVX2 - WASMSIMD LASX - ARGB1555ToUVMatrixRow_C NEON AVX2 - WASMSIMD - - ARGB1555ToUVRow_C NEON - - - LASX - ARGB1555ToYMatrixRow_C NEON AVX2 - WASMSIMD - - ARGB1555ToYRow_C NEON - - - LASX - ARGB4444ToARGBRow_C NEON AVX2 - WASMSIMD LASX - ARGB4444ToUVMatrixRow_C NEON AVX2 - WASMSIMD - - ARGB4444ToUVRow_C NEON - - - - - ARGB4444ToYMatrixRow_C NEON AVX2 - WASMSIMD - - ARGB4444ToYRow_C NEON - - - - - ARGBAddRow_C NEON AVX2 - - LASX HVX ARGBAffineRow_C - SSE2 - - - - ARGBAlphaBlendRow_C SME AVX512BW RVV WASMSIMD LASX HVX ARGBAttenuateRow_C NEON AVX512BW RVV - LASX HVX ARGBBlendRow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBColorMatrixRow_C I8MM SSSE3 - - LASX - ARGBColorTableRow_C - X86 - - - - ARGBCopyAlphaRow_C - AVX2 - - - HVX ARGBCopyYToAlphaRow_C NEON AVX512BW RVV WASMSIMD - HVX ARGBExtractAlphaRow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBGrayRow_C DOTPROD AVX512VNNI - - LASX - ARGBLumaColorTableRow_C - SSSE3 - - - - ARGBMirrorRow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBMultiplyRow_C SME AVX512BW RVV - LASX HVX ARGBOrRow_C SME AVX512BW RVV WASMSIMD LASX HVX ARGBPolynomialRow_C - AVX2 - - - - ARGBQuantizeRow_C NEON SSE2 - - LASX - ARGBSepiaRow_C DOTPROD SSSE3 - - LASX - ARGBSetRow_C NEON X86 RVV - LASX HVX ARGBShadeRow_C NEON SSE2 - - LASX - ARGBShuffleRow_C NEON AVX512BW RVV WASMSIMD LASX - ARGBSubtractRow_C NEON AVX2 - - LASX HVX ARGBToAB64Row_C NEON AVX2 RVV - - HVX ARGBToABGRRow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBToAR30Row_C NEON AVX512BW - - - - ARGBToAR64Row_C NEON AVX2 RVV - - HVX ARGBToARGB1555Row_C NEON AVX2 - WASMSIMD LASX - ARGBToARGB4444Row_C NEON AVX2 - WASMSIMD LASX - ARGBToBGRARow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBToRAWRow_C SVE2 AVX512BW RVV - LASX - ARGBToRGB24Row_C SVE2 AVX512BW RVV - LASX - ARGBToRGB565DitherRow_C SVE2 AVX2 - WASMSIMD LASX - ARGBToRGB565Row_C SVE2 AVX2 - WASMSIMD LASX - ARGBToRGBARow_C NEON AVX512BW RVV WASMSIMD LASX HVX ARGBToUV444MatrixRow_C I8MM AVX512VBMI RVV WASMSIMD - HVX ARGBToUVMatrixRow_C SME AVX512VBMI RVV WASMSIMD - HVX ARGBToYMatrixRow_C SME AVX512VBMI RVV WASMSIMD LASX HVX ARGBUnattenuateRow_C - AVX2 - - - - AYUVToUVRow_C SVE2 AVX512VBMI - - - - AYUVToVURow_C SVE2 AVX512VBMI - - - - AYUVToYRow_C NEON AVX512VBMI - - - - BGRAToUVRow_C - - - - - - BGRAToYRow_C DOTPROD - - - - - BlendPlaneRow_C NEON AVX512BW RVV WASMSIMD - HVX ByteToFloatRow_C NEON - - - - - ComputeCumulativeSumRow_C NEON AVX2 - - - - Convert16To8Row_C SME AVX512BW RVV - - HVX Convert8To16Row_C SME AVX512BW RVV WASMSIMD - HVX Convert8To8Row_C SME AVX2 - - - HVX CopyRow_C SME AVX512BW RVV - LASX HVX CopyRow_16_C - - - - - HVX CumulativeSumToAverageRow_C NEON AVX2 - - - - DetileRow_C NEON SSE2 - - - - DetileRow_16_C NEON AVX - - - - DetileSplitUVRow_C NEON SSSE3 - - - - DivideRow_16_C SVE2 AVX2 - - - HVX GaussRow_C - - - - - - GaussRow_F32_C NEON - - - - - HalfFloatRow_C SVE2 AVX2 - - LASX - HalfMergeUVRow_C SVE2 AVX512BW - - - - HalfRow_16To8_C SME AVX512BW RVV - - HVX HalfWidthRow_16To8_C SME AVX512BW RVV - - - HalfWidthRow_16To8_Odd_C - - - - - - I210AlphaToARGBRow_C SME AVX2 - - - - I210ToAR30Row_C SME AVX2 - - - - I210ToARGBRow_C SME AVX2 - - - - I212ToAR30Row_C SME AVX2 - - - - I212ToARGBRow_C SME AVX2 - - - - I400ToARGBRow_C SME AVX512BW RVV - LASX HVX I410AlphaToARGBRow_C SME AVX2 - - - - I410ToAR30Row_C SME AVX2 - - - - I410ToARGBRow_C SME AVX2 - - - - I422AlphaToARGBRow_C SME AVX512BW RVV - LASX HVX I422ToAR30Row_C SME AVX512BW RVV WASMSIMD - - I422ToARGB1555Row_C SME AVX2 - WASMSIMD LASX - I422ToARGB4444Row_C SME AVX2 - WASMSIMD LASX - I422ToARGBRow_C SME AVX512BW RVV WASMSIMD LASX HVX I422ToRGB24Row_C SME AVX512VBMI RVV WASMSIMD LASX - I422ToRGB565Row_C SME AVX2 - WASMSIMD LASX - I422ToRGBARow_C SME AVX2 RVV - LASX HVX I422ToUYVYRow_C NEON AVX2 - - LASX - I422ToYUY2Row_C NEON AVX2 - - LASX - I444AlphaToARGBRow_C SME AVX2 RVV - - HVX I444ToARGBRow_C SME AVX2 RVV - LASX HVX I444ToRGB24Row_C SME AVX2 RVV - - - InterpolateRow_C SME AVX512BW RVV WASMSIMD LASX HVX InterpolateRow_16_C SME AVX512BW - WASMSIMD - HVX J400ToARGBRow_C NEON AVX512BW RVV WASMSIMD LASX HVX MergeAR64Row_C NEON AVX2 - - - - MergeARGB16To8Row_C NEON AVX2 - - - - MergeARGBRow_C NEON AVX2 RVV - - HVX MergeRGBRow_C NEON AVX512VBMI RVV - - - MergeUVRow_C SME AVX512BW RVV WASMSIMD LASX HVX MergeUVRow_16_C SME AVX2 - - - HVX MergeXR30Row_C NEON AVX512BW - - - - MergeXR64Row_C NEON AVX2 - - - - MergeXRGB16To8Row_C NEON AVX2 - - - - MergeXRGBRow_C NEON AVX2 RVV - - HVX MirrorRow_C NEON AVX512BW - WASMSIMD LASX HVX MirrorRow_16_C - AVX512BW - - - HVX MirrorSplitUVRow_C NEON AVX512BW - WASMSIMD LASX HVX MirrorUVRow_C NEON AVX512BW RVV WASMSIMD LASX HVX MultiplyRow_16_C SME AVX512BW RVV WASMSIMD - HVX NV12ToARGBRow_C SME AVX512BW RVV WASMSIMD LASX HVX NV12ToRGB24Row_C SME AVX512VBMI RVV - - - NV12ToRGB565Row_C NEON AVX2 - WASMSIMD LASX - NV21ToARGBRow_C SME AVX512BW RVV WASMSIMD LASX HVX NV21ToRGB24Row_C SME AVX512VBMI RVV - - - NV21ToYUV24Row_C NEON AVX2 - - - - P210ToAR30Row_C SME AVX2 - - - - P210ToARGBRow_C SME AVX2 - - - - P410ToAR30Row_C SME AVX2 - - - - P410ToARGBRow_C SME AVX2 - - - - RAWToARGBRow_C SVE2 AVX512BW RVV WASMSIMD LASX - RAWToRGB24Row_C SVE2 AVX512VBMI RVV WASMSIMD LASX - RAWToRGBARow_C SVE2 AVX512VBMI RVV - - - RAWToUVJRow_C - - - - - - RAWToUVRow_C NEON - - - LASX - RGB24MirrorRow_C NEON AVX512VBMI - WASMSIMD - - RGB24ToARGBRow_C SVE2 AVX512BW RVV WASMSIMD LASX - RGB24ToUVJRow_C - - - - - - RGB24ToUVRow_C NEON - - - LASX - RGB565ToARGBRow_C NEON AVX2 - WASMSIMD LASX - RGB565ToUVMatrixRow_C NEON AVX2 - WASMSIMD - - RGB565ToUVRow_C NEON - - - LASX - RGB565ToYMatrixRow_C NEON AVX2 - WASMSIMD - - RGB565ToYRow_C NEON - - - LASX - RGBAToARGBRow_C NEON AVX512BW RVV WASMSIMD LASX HVX RGBAToUVJRow_C - - - - - - RGBAToUVRow_C - - - - - - RGBAToYJRow_C DOTPROD SSSE3 - - - - RGBAToYRow_C DOTPROD - - - - - RGBColorTableRow_C - X86 - - - - RGBToUV444MatrixRow_C NEON AVX512BW RVV WASMSIMD - - RGBToUVMatrixRow_C NEON AVX512BW RVV WASMSIMD - - RGBToYMatrixRow_C DOTPROD AVX512BW RVV WASMSIMD LASX - SetRow_C NEON ERMS - - LASX HVX SobelRow_C NEON SSE2 - - LASX - SobelToPlaneRow_C NEON SSE2 - - LASX - SobelXRow_C NEON SSE2 - - - - SobelXYRow_C NEON SSE2 - - LASX - SobelYRow_C NEON SSE2 - - - - SplitARGBRow_C NEON AVX2 RVV - - HVX SplitRGBRow_C NEON AVX2 RVV - - - SplitUVRow_C SVE2 AVX512BW RVV - LASX HVX SplitUVRow_16_C NEON AVX2 - - - HVX SplitXRGBRow_C NEON AVX2 RVV - - HVX SwapUVRow_C NEON AVX512BW RVV WASMSIMD - HVX UYVYToARGBRow_C SME AVX2 - - LASX - UYVYToUV422Row_C NEON AVX2 - - LASX HVX UYVYToUVRow_C SVE2 AVX2 - - LASX HVX UYVYToYRow_C SVE2 AVX2 - - LASX HVX YUY2ToARGBRow_C SME AVX2 - - LASX - YUY2ToNVUVRow_C NEON AVX2 - - - - YUY2ToUV422Row_C NEON AVX2 - - LASX HVX YUY2ToUVRow_C SVE2 AVX2 - - LASX HVX YUY2ToYRow_C SVE2 AVX2 - - LASX HVX ------------------------------------------------------------------------ SIMD (170/179 95%) 158 88% 156 87% 64 36% 56 31% 75 42% 64 36% ------------------------------------------------------------------------ Bug: none Test: libyuv_unittest --gtest_filter=MergeRGB:HalfFloat Change-Id: I53d5e14b284346247551e9e8da87f60cc4ef4d63 Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8640326 Reviewed-by: Wan-Teh Chang <wtc@google.com>		2026-10-27 13:13:51 -07:00
build_overrides	[vpython] Migrate .vpython3 to vpython.toml	2026-09-18 00:28:26 -07:00
docs	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -07:00
include	[libyuv] Fix HAS_ macros for MergeRGBRow, HalfFloatRow	2026-10-27 13:13:51 -07:00
infra/config	Use default xcode version in libyuv	2025-11-24 07:54:14 -08:00
riscv_script	[libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking	2026-09-28 10:59:30 -07:00
source	AArch64: Avoid lane-indexed LD4 dependency in 32 bit transpose	2026-10-27 12:36:26 -07:00
tools_libyuv	Remove libyuv dependency on base/	2025-01-08 09:04:21 -08:00
unit_test	[libyuv] Add ARGBOr and ARGBAlphaBlend with multi-platform SIMD	2026-10-26 11:24:16 -07:00
util	[libyuv] Optimize SsimWindowRow with SIMD and use compare_win on x86	2026-10-20 15:00:52 -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	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -07:00
Android.mk	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -07:00
AUTHORS	Fix same-width vertical point upsampling	2026-08-24 19:28:50 -07:00
BUILD.bazel	[libyuv] Add WASM SIMD128 and Relaxed SIMD for RAWToRGB24Row	2026-10-05 17:45:41 -07:00
BUILD.gn	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -07:00
CM_linux_packages.cmake	Use grep extended regex for version	2024-11-13 02:11:17 +00:00
CMakeLists.txt	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -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	Update pylintrc to a pep-8 like style	2024-12-18 05:38:56 -08:00
GEMINI.md	[libyuv] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -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] Add Qualcomm Hexagon HVX SIMD support	2026-10-19 14:16:18 -07:00
LICENSE	Update Copyright notice to follow new chromium conventions.	2012-08-08 19:04:24 +00:00
linux.mk	[libyuv] Optimize SsimWindowRow with SIMD and use compare_win on x86	2026-10-20 15:00:52 -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	[libyuv] Add AVX-512 VNNI row functions for ARGB to YUV and Gray	2026-10-26 14:07:50 -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.