Condidtionally drop projection from the alt2 frame

Change-Id: I3ac81379669678254672f125df281980b687e16e

Condidtionally drop projection from the alt2 frame
Change-Id: I3ac81379669678254672f125df281980b687e16e
49705df3 · Jingning Han · dd4f0fa5 · 49705df3
Commit 49705df3 authored Oct 19, 2017 by Jingning Han
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av1/common/mvref_common.c av1/common/mvref_common.c +4 -1

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--- a/av1/common/mvref_common.c
+++ b/av1/common/mvref_common.c
@@ -1931,7 +1931,10 @@ void av1_setup_motion_field(AV1_COMMON *cm) {
  }

  motion_field_projection(cm, ALTREF_FRAME);
-  motion_field_projection(cm, ALTREF2_FRAME);
+
+  if (alt2_frame_index > cur_frame_index)
+    motion_field_projection(cm, ALTREF2_FRAME);
+
  motion_field_projection(cm, BWDREF_FRAME);
 }
 #endif  // CONFIG_MFMV