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Use diamond search to replace full search in full-pixel refining search

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In NEWMV mode, currently, full search is used as the refining search
after n-step search. By replacing it with an iterative diamond search
of radius 1 largely reduced the computation complexity, but still
maintained the same encoding quality since the refining search is
done for every macroblock instead of only a small precentage of
macroblocks while using full search.

Tests on the test set showed a 3.4% encoding speed increase with none
psnr & ssim loss.

Change-Id: Ife907d7eb9544d15c34f17dc6e4cfd97cb743d41
This commit is contained in:
Yunqing Wang
2011-05-06 12:51:31 -04:00
parent 5c756005aa
commit cb7b1fb144
8 changed files with 335 additions and 173 deletions
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vp8/encoder/generic/csystemdependent.c
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@@ -90,6 +90,7 @@ void vp8_cmachine_specific_config(VP8_COMP *cpi)
cpi->rtcd.quantize.quantb = vp8_regular_quantize_b;
cpi->rtcd.quantize.fastquantb = vp8_fast_quantize_b_c;
cpi->rtcd.search.full_search = vp8_full_search_sad;
cpi->rtcd.search.refining_search = vp8_refining_search_sad;
cpi->rtcd.search.diamond_search = vp8_diamond_search_sad;
#if !(CONFIG_REALTIME_ONLY)
cpi->rtcd.temporal.apply = vp8_temporal_filter_apply_c;