commit ba8052c05527e4279defac2248b70a51e8c79a93
author Jingning Han <jingning@google.com> Tue Jul 23 13:34:43 2019 -0700
committer Jingning Han <jingning@google.com> Wed Jul 24 21:26:40 2019 +0000
tree d37d479af3baecbdf541617ef9c0142653fbbfb0
parent 978b3c2f762da515fd0eb5379ee851618cf33955

Tune the reference frame assignment to fit speed feature

Adjust the reference frame assignment to better fit the existing
speed features. Local test on bus_cif at 1000 kbps shows about
10% speed up in speed 1. The compression performance is slightly
improved by 0.02% - 0.08% in speed 1 and 150 frames across lowres,
midres, and ugc360.

STATS_CHANGED

Change-Id: I43a70b6ea7d5ba30ad65f03fc596b732c7bd1d64

av1/encoder/encode_strategy.c

diff --git a/av1/encoder/encode_strategy.c b/av1/encoder/encode_strategy.c
index 0e31056..fdcbac6 100644
--- a/av1/encoder/encode_strategy.c
+++ b/av1/encoder/encode_strategy.c
@@ -1146,15 +1146,15 @@
 
   if (gld_stack_size) {
     cm->remapped_ref_idx[GOLDEN_FRAME - LAST_FRAME] =
-        ref_buffer_stack->gld_stack[gld_stack_size - 1];
+        ref_buffer_stack->gld_stack[0];
 
     if (gld_stack_size > 1) {
       if (arf_stack_size <= 1)
         cm->remapped_ref_idx[BWDREF_FRAME - LAST_FRAME] =
-            ref_buffer_stack->gld_stack[0];
+            ref_buffer_stack->gld_stack[1];
       else
         cm->remapped_ref_idx[LAST3_FRAME - LAST_FRAME] =
-            ref_buffer_stack->gld_stack[0];
+            ref_buffer_stack->gld_stack[1];
     }
   }