shithub: libvpx

Download patch

ref: 56fa3ab886c47ccab74e7457dc57d43537dcaf75
parent: 252822e81c1d6f7edb359f4358fe9cec2fbb14a8
author: Jingning Han <jingning@google.com>
date: Tue Sep 16 05:49:17 EDT 2014 

Use non-zero mode threshold for NEARESTMV modes

This commit makes the encoder to use non-zero mode threshold for
NEARESTMV modes. The runtime for test clips of speed 3 is reduced
by about 1%.

pedestrian 1080p 2000 kbps, 143239 ms -> 141989 ms
bus CIF 1000 kbps, 7835 ms -> 7749 ms

The compression performance change is about -0.02% for both derf
and stdhd.

Change-Id: Ib71808922c41ae2997100cb7c561f68dcebfa08e


--- a/vp9/encoder/vp9_rd.c
+++ b/vp9/encoder/vp9_rd.c
@@ -457,9 +457,15 @@
   for (i = 0; i < MAX_MODES; ++i)
     rd->thresh_mult[i] = cpi->oxcf.mode == BEST ? -500 : 0;
 
-  rd->thresh_mult[THR_NEARESTMV] = 0;
-  rd->thresh_mult[THR_NEARESTG] = 0;
-  rd->thresh_mult[THR_NEARESTA] = 0;
+  if (sf->adaptive_rd_thresh) {
+    rd->thresh_mult[THR_NEARESTMV] = 300;
+    rd->thresh_mult[THR_NEARESTG] = 300;
+    rd->thresh_mult[THR_NEARESTA] = 300;
+  } else {
+    rd->thresh_mult[THR_NEARESTMV] = 0;
+    rd->thresh_mult[THR_NEARESTG] = 0;
+    rd->thresh_mult[THR_NEARESTA] = 0;
+  }
 
   rd->thresh_mult[THR_DC] += 1000;
 
-- 
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