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android / platform / external / libyuv / d981495b
commitd981495b4207d2c079dbbf690788858c17e145bb[log] [tgz]
authorFrank Barchard <fbarchard@google.com>Wed Jun 07 15:19:25 2017 -0700
committerCommit Bot <commit-bot@chromium.org>Wed Jun 07 23:23:24 2017 +0000
treebe43a03932fe1a9a7e60ad07715f09672312ad07
parent790e0634a8a974cdc4721e5de34a06dc4961f7fa [diff]
Hamming Distance using 16 bit accumulators

Summing 16 bit hamming codes restricts the maximum length,
but saves an inner loop instruction.  The outer loop can sum the
values.

32 bit Neon
Now BenchmarkHammingDistance_Opt (78 ms)
Was BenchmarkHammingDistance_Opt (92 ms)

64 bit Neon
Now BenchmarkHammingDistance_Opt (85 ms)
Was BenchmarkHammingDistance_Opt (92 ms)

R=wangcheng@google.com
TBR=kjellander@chromium.org
BUG=libyuv:701
TEST=BenchmarkHammingDistance

Change-Id: Ie40f0eac2f3339c33b833b42af5d394b122066ae
Reviewed-on: https://chromium-review.googlesource.com/526932
Reviewed-by: Frank Barchard <fbarchard@google.com>
Reviewed-by: Cheng Wang <wangcheng@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
4 files changed
tree: be43a03932fe1a9a7e60ad07715f09672312ad07
  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.