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| author | Clement Courbet <courbet@google.com> | 2020-03-20 09:22:55 +0100 |
|---|---|---|
| committer | Clement Courbet <courbet@google.com> | 2020-03-20 13:33:37 +0100 |
| commit | 81374532905b376cead0958c543c431bac530620 (patch) | |
| tree | 01fd3ccc746a17b21a367c97c0ada53270ff2c3e /vp8/encoder/segmentation.c | |
| parent | a0765aa9f34e7f5dfa1ba938dbe9e1399a75bf5e (diff) | |
| download | libvpx-81374532905b376cead0958c543c431bac530620.tar libvpx-81374532905b376cead0958c543c431bac530620.tar.gz libvpx-81374532905b376cead0958c543c431bac530620.tar.bz2 libvpx-81374532905b376cead0958c543c431bac530620.zip | |
Optimize vp9_get_sub_block_energy.
Because energy scaling is non-decreasing, we can work on the variance
and scale after the loop. This avoids costly computations (in
particular, log()) within the loop.
We've measured that we spend 0.8% of our total time computing the log.
Change-Id: I302fc0ecd9fd8cf96ee9f31b8673e82de1b2b3e2
Diffstat (limited to 'vp8/encoder/segmentation.c')
0 files changed, 0 insertions, 0 deletions