From: Fiona Glaser <fiona@x264.com>
Date: Fri, 25 Oct 2013 00:19:00 +0000 (-0700)
Subject: chroma-me: take shortcut in BI analysis
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=77cc44feea75106fae6d3113f6babbbe8cffba87;p=libx264

chroma-me: take shortcut in BI analysis

~100 cycles faster with subme>=9
---

diff --git a/encoder/analyse.c b/encoder/analyse.c
index d1b00f46..3796afb2 100644
--- a/encoder/analyse.c
+++ b/encoder/analyse.c
@@ -2121,7 +2121,7 @@ static void x264_mb_analyse_inter_b16x16( x264_t *h, x264_mb_analysis_t *a )
         int cost00 = h->pixf.mbcmp[PIXEL_16x16]( h->mb.pic.p_fenc[0], FENC_STRIDE, pix0, 16 )
                    + ref_costs + l0_mv_cost + l1_mv_cost;
 
-        if( h->mb.b_chroma_me )
+        if( h->mb.b_chroma_me && cost00 < a->i_cost16x16bi )
         {
             ALIGNED_ARRAY_16( pixel, bi, [16*FENC_STRIDE] );