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chromium / libyuv / libyuv / 1c31461771ed6d21101ea7236496a620ba926863
commit1c31461771ed6d21101ea7236496a620ba926863[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Thu Apr 18 09:40:41 2024
committerFrank Barchard <fbarchard@chromium.org>Mon Sep 16 04:31:11 2024
treeadaeea75061dc01560f5defe3f0dfbdc61f23583
parent2d62d8d22a612a51f91d9f90f55c674b77b340e9 [diff]
[AArch64] Add Neon dot-product implementation for ARGBGrayRow

We can use dot product instructions to apply the coefficients without
needing to use LD4 deinterleaving load instructions, and then TBL to mix
in the original alpha component. This is significantly faster on some
micro-architectures where LD4 instructions are known to be slow compared
to normal loads.

Reduction in cycle counts observed compared to existing Neon code:

 Cortex-A55: -12.6%
Cortex-A510: -48.6%
 Cortex-A76: -39.7%
Cortex-A720: -52.3%
  Cortex-X1: -63.5%
  Cortex-X2: -67.0%

Bug: b/42280946
Change-Id: I3641785e74873438acc00d675f5bc490dfa95b50
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5785972
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
3 files changed
tree: adaeea75061dc01560f5defe3f0dfbdc61f23583
  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.