shithub: libvpx

Download patch

ref: affd9921e405063ed7815f412b15e634c8c9cfca
parent: bb9511684f70a735b3b909712666021e178c93e7
author: Deepa K G <deepa.kg@ittiam.com>
date: Thu Jun 20 14:30:41 EDT 2019 

Set up frame contexts based on frame type

In single layer ARF case, use different frame
contexts for KF, ARF/GF, LF, OVERLAY update types.

Change-Id: Iebb7f9bb430e483dea1e75fc122b9b67645ce804


--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -814,7 +814,17 @@
   if (frame_is_intra_only(cm) || cm->error_resilient_mode) {
     vp9_setup_past_independence(cm);
   } else {
-    if (!cpi->use_svc) cm->frame_context_idx = cpi->refresh_alt_ref_frame;
+    if (!cpi->use_svc) {
+      const int boost_frame =
+          !cpi->rc.is_src_frame_alt_ref &&
+          (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame);
+      if (boost_frame)
+        cm->frame_context_idx = 1;
+      else if (cpi->rc.is_src_frame_alt_ref)
+        cm->frame_context_idx = 2;
+      else
+        cm->frame_context_idx = 3;
+    }
   }
 
   // TODO(jingning): Overwrite the frame_context_idx index in multi-layer ARF