mirror of
https://chromium.googlesource.com/libyuv/libyuv
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f310cb6ce1
Add SetMaxThreads() and GetMaxThreads() APIs (with LIBYUV_NUM_THREADS environment variable override, defaulting to half of logical cores capped at 8 when built with -fopenmp). Enable OpenMP parallel row processing for large frames (>= 1280x720) in I420ToARGBMatrix and CopyPlane (including reshaping coalesced contiguous planes across threads), and configure thread counts for ComputeHammingDistance, ComputeSumSquareError, and CalcFrameSsim. 1280x720 Benchmarks (ms): Benchmark Reps 1T 2T 4T 8T Speedup -------------------------------------------------------- I420ToARGB_Opt 1000 272 162 88 60 4.53x CopyPlane_Opt 1000 57 42 19 14 4.07x BenchmarkPsnr_Opt 1000 92 76 56 34 2.71x BenchmarkSsim_Opt 100 518 241 147 89 5.82x R=rrwinterton@gmail.com Bug: none Test: libyuv_unittest --gtest_filter=*TestSetMaxThreads*:*I420ToARGB_Opt*:*CopyPlane_Opt*:*Ssim* Change-Id: I5ca9a2b8c68eaac870da6353c51306930d015c3a CONV=a7f09b98-93ab-4652-a8eb-8d9551361f61 TAG=agy |
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| .. | ||
| deprecated_builds.md | ||
| environment_variables.md | ||
| feature_detection.md | ||
| filtering.md | ||
| formats.md | ||
| getting_started.md | ||
| rotation.md | ||