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Adds a new subpel motion function

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Adds a new subpel motion estimation function that uses a 2-level
tree-structured decision tree to eliminate redundant computations.
It searches fewer points than iterative search (which can search
the same point multiple times) but has the same quality roughly.

This is made the default setting at speeds 0 and 1, while at
speed 2 and above only a 1-level search is used.

Also includes various cleanups for consistency and redundancy removal.

Results:
derf: +0.012% psnr
stdhd: +0.09% psnr
Speedup of about 2-3%

Change-Id: Iedde4866f5475586dea0f0ba4cb7428fba24eee9
This commit is contained in:
Deb Mukherjee
2013-08-07 17:01:43 -07:00
parent 296931c817
commit 1ba91a84ad
5 changed files with 323 additions and 178 deletions
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13
vp9/encoder/vp9_onyx_if.c
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@@ -713,8 +713,8 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
sf->search_method = NSTEP;
sf->auto_filter = 1;
sf->recode_loop = 1;
sf->subpel_search_method = SUBPEL_ITERATIVE;
sf->subpel_iters_per_step = 3;
sf->subpel_search_method = SUBPEL_TREE;
sf->subpel_iters_per_step = 2;
sf->optimize_coefficients = !cpi->oxcf.lossless;
sf->reduce_first_step_size = 0;
sf->auto_mv_step_size = 0;
@@ -830,7 +830,7 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
(MIN(cpi->common.width, cpi->common.height) >= 720)? 1 : 0;
sf->auto_mv_step_size = 1;
sf->search_method = SQUARE;
sf->subpel_iters_per_step = 2;
sf->subpel_iters_per_step = 1;
}
if (speed == 3) {
sf->comp_inter_joint_search_thresh = BLOCK_SIZE_TYPES;
@@ -922,9 +922,10 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
if (cpi->sf.subpel_search_method == SUBPEL_ITERATIVE) {
cpi->find_fractional_mv_step = vp9_find_best_sub_pixel_iterative;
} else {
// TODO(debargha): Other methods to come
assert(0);
cpi->find_fractional_mv_step_comp = vp9_find_best_sub_pixel_comp_iterative;
} else if (cpi->sf.subpel_search_method == SUBPEL_TREE) {
cpi->find_fractional_mv_step = vp9_find_best_sub_pixel_tree;
cpi->find_fractional_mv_step_comp = vp9_find_best_sub_pixel_comp_tree;
}
cpi->mb.optimize = cpi->sf.optimize_coefficients == 1 && cpi->pass != 1;