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George Steed c4a0c8d34a [AArch64] Add SVE2 and SME implementations for Convert8To8Row 
SVE can make use of the UMULH instruction to avoid needing separate
widening multiply and narrowing steps for the scale application.

Reduction in runtime for Convert8To8Row_SVE2 observed compared to the
existing Neon implementation:

        Cortex-A510: -13.2%
        Cortex-A520: -16.4%
        Cortex-A710: -37.1%
        Cortex-A715: -38.5%
        Cortex-A720: -38.4%
          Cortex-X2: -33.2%
          Cortex-X3: -31.8%
          Cortex-X4: -31.8%
        Cortex-X925: -13.9%

Change-Id: I17c0cb81661c5fbce786b47cdf481549cfdcbfc7
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/6207692
Reviewed-by: Wan-Teh Chang <wtc@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
2025-01-28 15:53:26 -08:00
build_overrides Roll chromium_revision af3d01376b..f2539aa88a (1174635:1398488) 2025-01-08 06:40:17 -08:00
docs avx10_2 detect 2025-01-21 13:53:19 -08:00
include [AArch64] Add SVE2 and SME implementations for Convert8To8Row 2025-01-28 15:53:26 -08:00
infra/config Revert "Remove linux_tsan2 bot from CQ." 2025-01-09 00:26:58 -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 [AArch64] Add SVE2 and SME implementations for Convert8To8Row 2025-01-28 15:53:26 -08:00
tools_libyuv Remove libyuv dependency on base/ 2025-01-08 09:04:21 -08:00
unit_test J420ToI420 using planar 8 bit scaling 2025-01-22 02:50:24 -08:00
util avx10_2 detect 2025-01-21 13:53:19 -08:00
.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 Roll chromium_revision 829c6df33d..7d683aeda8 (945687:1050091) 2022-09-22 14:56:57 +00:00
.vpython3 Update protobuf version in .vpython3. 2025-01-09 00:32:24 -08:00
Android.bp Split scale_test and scale_plane_test to allow building on small devices 2023-12-09 18:39:41 +00:00
Android.mk Split scale_test and scale_plane_test to allow building on small devices 2023-12-09 18:39:41 +00:00
AUTHORS [DEPS] Remove cleanup_links pre_deps_hooks 2024-04-08 15:47:48 +00:00
BUILD.gn Roll chromium_revision af3d01376b..f2539aa88a (1174635:1398488) 2025-01-08 06:40:17 -08:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt Update "TEST" to "UNIT_TEST" in a comment 2025-01-27 16:21:09 -08:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS Remove libyuv dependency on base/ 2025-01-08 09:04:21 -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
libyuv.gni Revert "Do not enable libyuv_use_sme for is_android" 2024-10-15 18:20:36 +00:00
libyuv.gyp Add libyuv.gyp build files 2022-03-21 23:48:16 +00:00
libyuv.gypi Fix missing headers in GN/GYP build files 2024-04-01 09:19:24 +00:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk Split convert_test and convert_argb_test to allow building on small systems that run out of memory compiling unittests. 2023-12-08 13:39:56 +00:00
OWNERS add jansson@google.com to infra owners to cover when Mirko is OOO 2022-10-28 09:46:02 +00:00
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 J420ToI420 AVX2 2025-01-27 11:23:44 -08:00
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

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.