Improve motion search in real-time mode
Applied better MV prediction in real-time mode, which improves
the encoding quality.
Used quarter-pixel search instead of iterative sub-pixel search
for speed >=5 to improve encoding performance.
Tests on the test set showed:
1. For speed=-5, quality improvement: 1.7% on AvgPSNR and 2.1%
on SSIM, performance improvement: 3.6% (This counts in the
performance lose caused by MV prediction calculation in "Improve
MV prediction in vp8_pick_inter_mode() for speed>3").
2. For speed=-8, quality improvement: 2.1% on AvgPSNR and 2.5%
on SSIM. but, 6.9% performance decrease because of MV prediction
calculation. This should be improved later.
Change-Id: I349a96c452bd691081d8c8e3e54419e7f477bebd
diff --git a/vp8/encoder/mcomp.h b/vp8/encoder/mcomp.h
index 7600f87..83f95c6 100644
--- a/vp8/encoder/mcomp.h
+++ b/vp8/encoder/mcomp.h
@@ -43,8 +43,8 @@
int *num00,
const vp8_variance_fn_ptr_t *vf,
int *mvsadcost[2],
- int *mvcost[2]
-
+ int *mvcost[2],
+ MV *center_mv
);
typedef int (fractional_mv_step_fp)
