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android / platform / external / libyuv / 790e0634a8a974cdc4721e5de34a06dc4961f7fa
commit790e0634a8a974cdc4721e5de34a06dc4961f7fa[log] [tgz]
authorFrank Barchard <fbarchard@google.com>Tue Jun 06 17:50:32 2017 -0700
committerFrank Barchard <fbarchard@google.com>Wed Jun 07 01:04:35 2017 +0000
tree1a063e29d07e40e48e7070365ebabb9b28f0413a
parent47d6eaa37771b02d4fc8b8cd75dabe384f350a97 [diff]
Port HammingDistance_NEON 32 bit code to 64 bit

The 32 bit version of HammingDistance_NEON accumulates
using vertical add and paired adds, which takes 3 instructions
instead of 4.
The instructions are also portable between 32 and 64 bit.

Was BenchmarkHammingDistance_Opt (105 ms)
Now BenchmarkHammingDistance_Opt (90 ms)

TBR=kjellander@chromium.org
BUG=libyuv:701
TEST=BenchmarkHammingDistance

BenchmarkHammingDistance_Opt (90 ms)

Change-Id: If9e621e0bd2fe2492a1532056f8a1b451ba53d7e
Reviewed-on: https://chromium-review.googlesource.com/526365
Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
1 file changed
tree: 1a063e29d07e40e48e7070365ebabb9b28f0413a
  1. build_overrides/
  2. docs/
  3. include/
  4. infra/
  5. source/
  6. tools_libyuv/
  7. unit_test/
  8. util/
  9. .clang-format
  10. .gitignore
  11. .gn
  12. all.gyp
  13. Android.mk
  14. AUTHORS
  15. BUILD.gn
  16. cleanup_links.py
  17. CM_linux_packages.cmake
  18. CMakeLists.txt
  19. codereview.settings
  20. DEPS
  21. download_vs_toolchain.py
  22. gyp_libyuv
  23. gyp_libyuv.py
  24. libyuv.gni
  25. libyuv.gyp
  26. libyuv.gypi
  27. libyuv_nacl.gyp
  28. libyuv_test.gyp
  29. LICENSE
  30. LICENSE_THIRD_PARTY
  31. linux.mk
  32. OWNERS
  33. PATENTS
  34. PRESUBMIT.py
  35. public.mk
  36. pylintrc
  37. README.chromium
  38. README.md
  39. 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.
  • Convert from YUV to formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSE2/SSSE3/AVX2 on x86/x64.
  • Optimized for Neon on Arm.
  • Optimized for DSP R2 on Mips.

Development

See [Getting started] 1 for instructions on how to get started developing.

You can also browse the [docs directory] 2 for more documentation.