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| author | Hui Su <huisu@google.com> | 2018-09-18 10:33:23 -0700 |
|---|---|---|
| committer | Hui Su <huisu@google.com> | 2018-09-21 09:37:31 -0700 |
| commit | 1b14cb4e942189db7401c7e0542280fb96672648 (patch) | |
| tree | f0fdd910757ca9accda726b85d82a2464b8b1044 /vp9/encoder/vp9_mcomp.c | |
| parent | 734c3d2b66b063e9ebcf0bc4ceb9ae3a9baacd31 (diff) | |
| download | libvpx-1b14cb4e942189db7401c7e0542280fb96672648.tar libvpx-1b14cb4e942189db7401c7e0542280fb96672648.tar.gz libvpx-1b14cb4e942189db7401c7e0542280fb96672648.tar.bz2 libvpx-1b14cb4e942189db7401c7e0542280fb96672648.zip | |
Improve subpel MV search for speed 1
Do one more subpel MV search each round. This improves coding
efficiency slightly:
lowres 0.12%
midres 0.11%
hdres 0.13%
Also renames the control flag for subpel MV search quality.
Encoding speed loss is less than 1%.
This only affects speed 1.
Change-Id: I3aecd25342f2dcacea6c143db494f7db6282cb92
Diffstat (limited to 'vp9/encoder/vp9_mcomp.c')
| -rw-r--r-- | vp9/encoder/vp9_mcomp.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/vp9/encoder/vp9_mcomp.c b/vp9/encoder/vp9_mcomp.c index 430659de3..30f101574 100644 --- a/vp9/encoder/vp9_mcomp.c +++ b/vp9/encoder/vp9_mcomp.c @@ -734,20 +734,30 @@ uint32_t vp9_find_best_sub_pixel_tree( bc = tc; } - if (iters_per_step > 1 && best_idx != -1) { + if (iters_per_step > 0 && best_idx != -1) { unsigned int second; const int br0 = br; const int bc0 = bc; assert(tr == br || tc == bc); + if (tr == br && tc != bc) { kc = bc - tc; + if (iters_per_step == 1) { + CHECK_BETTER(second, br0, bc0 + kc); + } } else if (tr != br && tc == bc) { kr = br - tr; + if (iters_per_step == 1) { + CHECK_BETTER(second, br0 + kr, bc0); + } } - CHECK_BETTER(second, br0 + kr, bc0); - CHECK_BETTER(second, br0, bc0 + kc); - if (br0 != br || bc0 != bc) { - CHECK_BETTER(second, br0 + kr, bc0 + kc); + + if (iters_per_step > 1) { + CHECK_BETTER(second, br0 + kr, bc0); + CHECK_BETTER(second, br0, bc0 + kc); + if (br0 != br || bc0 != bc) { + CHECK_BETTER(second, br0 + kr, bc0 + kc); + } } } |