From c725502bf32b0df223aaf179a828360433606a1c Mon Sep 17 00:00:00 2001
From: Jingning Han <jingning@google.com>
Date: Fri, 19 Jul 2013 15:18:05 -0700
Subject: [PATCH] Skip buffer update in sub8x8 rd loop
This commit allows the encoder to skip a few buffer update steps in
rd_pick_best_mbsegmentation, when early breakout has been triggered
in the rd_check_segment_txsize. It provides about 1% speed-up for
bus_cif at 2000 kbps, in the settings of speed 0.
Change-Id: Ica034f10a24dec572b397d8389a2b81020ebc0b9
---
vp9/encoder/vp9_rdopt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index ae51a3317d..69e45e8001 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -2129,6 +2129,8 @@ static int64_t rd_pick_best_mbsegmentation(VP9_COMP *cpi, MACROBLOCK *x,
rd_check_segment_txsize(cpi, x, &bsi, seg_mvs, mi_row, mi_col);
+ if (bsi.segment_rd > best_rd)
+ return INT64_MAX;
/* set it to the best */
for (i = 0; i < 4; i++) {
x->e_mbd.mode_info_context->bmi[i].as_mv[0].as_int = bsi.mvs[i].as_int;
--
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