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fuchsia / third_party / libyuv / dc392094fc77ecc00e12cb9f47ba7168fcac1dcd
commitdc392094fc77ecc00e12cb9f47ba7168fcac1dcd[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Wed May 15 21:37:36 2024 +0100
committerFrank Barchard <fbarchard@chromium.org>Fri Jul 19 19:52:01 2024 +0000
tree12e819b4b28f709f813660a0cdb369ed183bc01f
parent776a509891796d07006d2aedfe40e26b1075b026 [diff]
[AArch64] Unroll ScaleRowDown34_0_Box_NEON

The additional parallel instruction streams provide a good benefit to
little cores with limited out-of-order capability.

Reduction in runtimes observed compared to the existing Neon
implementation:

 Cortex-A55: -19.1%
Cortex-A510: -31.6%
Cortex-A520: -35.2%
 Cortex-A76: -14.3%
Cortex-A715:  +0.1%
Cortex-A720:  =0.0%
  Cortex-X1:  -6.6%
  Cortex-X2:  -0.1%
  Cortex-X3:  -0.2%
  Cortex-X4:  -7.2%

Bug: b/42280945
Change-Id: Idca21a5af1dc6f189e644a81537d41f50ef66498
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5725171
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
2 files changed
tree: 12e819b4b28f709f813660a0cdb369ed183bc01f
  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 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.