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fuchsia / third_party / libyuv / 22ac86800edc2b6419a815a300e6d63d0708a35b
commit22ac86800edc2b6419a815a300e6d63d0708a35b[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Sun May 05 19:49:24 2024 +0100
committerFrank Barchard <fbarchard@chromium.org>Thu Oct 24 21:27:39 2024 +0000
tree0b76affc6822b97f6b691b5d5893a8045885469c
parentf4eaeca22aa82f1b69eef4aca7f04b90f1584fb0 [diff]
[AArch64] Add SVE2 implementation of I422ToARGB4444Row

This makes use of the same approach as the Neon code to avoid redundant
narrowing and then widening shifts by instead placing the values at the
top portion of the lanes and then shifting down from there instead.

Observed reduction in runtime compared to the existing Neon code:

Cortex-A510: -35.5%
Cortex-A520: -38.2%
Cortex-A715: -19.8%
Cortex-A720: -19.8%
  Cortex-X2: -24.2%
  Cortex-X3: -24.1%
  Cortex-X4: -21.6%
Cortex-X925: -19.5%

Bug: b/42280942
Change-Id: I0a916600e7bdee0f5480ea843b44ab046bb3d082
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5802968
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
3 files changed
tree: 0b76affc6822b97f6b691b5d5893a8045885469c
  1. build_overrides/
  2. docs/
  3. include/
  4. infra/
  5. riscv_script/
  6. source/
  7. tools_libyuv/
  8. unit_test/
  9. util/
  10. .clang-format
  11. .gitignore
  12. .gn
  13. .vpython
  14. .vpython3
  15. Android.bp
  16. Android.mk
  17. AUTHORS
  18. BUILD.gn
  19. CM_linux_packages.cmake
  20. CMakeLists.txt
  21. codereview.settings
  22. DEPS
  23. DIR_METADATA
  24. download_vs_toolchain.py
  25. libyuv.gni
  26. libyuv.gyp
  27. libyuv.gypi
  28. LICENSE
  29. linux.mk
  30. OWNERS
  31. PATENTS
  32. PRESUBMIT.py
  33. public.mk
  34. pylintrc
  35. README.chromium
  36. README.md
  37. winarm.mk
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.