From: Jingning Han <jingning@google.com>
Date: Tue, 1 Mar 2016 00:52:44 +0000 (-0800)
Subject: Port alt reference frame filter improvement to VP9
X-Git-Tag: v1.6.0~320^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9c0a2a7935c37c6925600770fa2d9ca73375cd73;p=libvpx

Port alt reference frame filter improvement to VP9

Use sharp filter to generate motion compensated reference for
temporal filtering. It improves the average coding performance of
VP9 speed 0:
derf    0.34%
hevcmr  0.38%
stdhd   0.58%

Change-Id: I1772a051be545de8c343055274e5ca0929d19cda
---

diff --git a/vp9/encoder/vp9_temporal_filter.c b/vp9/encoder/vp9_temporal_filter.c
index 82f566b13..ebe28b8bf 100644
--- a/vp9/encoder/vp9_temporal_filter.c
+++ b/vp9/encoder/vp9_temporal_filter.c
@@ -45,8 +45,7 @@ static void temporal_filter_predictors_mb_c(MACROBLOCKD *xd,
                                             int x, int y) {
   const int which_mv = 0;
   const MV mv = { mv_row, mv_col };
-  const InterpKernel *const kernel =
-    vp9_filter_kernels[xd->mi[0]->interp_filter];
+  const InterpKernel *const kernel = vp9_filter_kernels[EIGHTTAP_SHARP];
 
   enum mv_precision mv_precision_uv;
   int uv_stride;
@@ -86,6 +85,7 @@ static void temporal_filter_predictors_mb_c(MACROBLOCKD *xd,
     return;
   }
 #endif  // CONFIG_VP9_HIGHBITDEPTH
+  (void)xd;
   vp9_build_inter_predictor(y_mb_ptr, stride,
                             &pred[0], 16,
                             &mv,