From: Alex Converse <aconverse@google.com>
Date: Thu, 26 Jun 2014 19:55:37 +0000 (-0700)
Subject: Use UV prediction when deciding to skip in for lossless.
X-Git-Tag: v1.4.0~1322^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=aed52718762148cd2725f5456cef793c939a38d0;p=libvpx

Use UV prediction when deciding to skip in for lossless.

Change-Id: Ic149749157d762039446d14472d40d9211c6451a
---

diff --git a/vp9/encoder/vp9_pickmode.c b/vp9/encoder/vp9_pickmode.c
index 4c340ea0b..f007d1cb1 100644
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -576,8 +576,14 @@ int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
           unsigned int sse_u, sse_v;
           unsigned int var_u, var_v;
 
-          // Skip u v prediction for less calculation, that won't affect
-          // result much.
+          // Skip UV prediction unless breakout is zero (lossless) to save
+          // computation with low impact on the result
+          if (x->encode_breakout == 0) {
+            xd->plane[1].pre[0] = yv12_mb[ref_frame][1];
+            xd->plane[2].pre[0] = yv12_mb[ref_frame][2];
+            vp9_build_inter_predictors_sbuv(xd, mi_row, mi_col, bsize);
+          }
+
           var_u = cpi->fn_ptr[uv_size].vf(x->plane[1].src.buf,
                                           x->plane[1].src.stride,
                                           xd->plane[1].dst.buf,