commit fff06fb0c69efa4a6ec43d56661e4b3bd62a006d
author Yunqing Wang <yunqingwang@google.com> Fri Oct 12 16:03:27 2018 -0700
committer Yunqing Wang <yunqingwang@google.com> Wed Oct 17 18:06:41 2018 +0000
tree fa14ba46300864f3133268b9ef76673a74df9fb4
parent 29147cfe56c41a91b4e1eb636edc0e9c1bf84f98

Use sharp interpolation filter in temporal filtering

Used sharp interpolation filter at temporal filtering motion compensation
stage as done in VP9. This gave 0.3759% PSNR gain and 0.4604% SSIM gain.

AWCY result(speed 1):
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.3759 | -0.3107 | -0.5555 |   0.2210 | -0.4604 | -0.0932 |    -0.3368

STATS_CHANGED

Change-Id: I54ffdeae113d28acb08ab428859b4f9b997b05db

av1/encoder/temporal_filter.c

diff --git a/av1/encoder/temporal_filter.c b/av1/encoder/temporal_filter.c
index cab4b73..2c5a360 100644
--- a/av1/encoder/temporal_filter.c
+++ b/av1/encoder/temporal_filter.c
@@ -47,7 +47,8 @@
   int uv_stride;
   // TODO(angiebird): change plane setting accordingly
   ConvolveParams conv_params = get_conv_params(0, 0, xd->bd);
-  const InterpFilters interp_filters = xd->mi[0]->interp_filters;
+  const InterpFilters interp_filters =
+      av1_make_interp_filters(MULTITAP_SHARP, MULTITAP_SHARP);
   WarpTypesAllowed warp_types;
   memset(&warp_types, 0, sizeof(WarpTypesAllowed));
 
@@ -262,7 +263,7 @@
         cpi->common.allow_high_precision_mv, x->errorperbit,
         &cpi->fn_ptr[BLOCK_16X16], 0, mv_sf->subpel_iters_per_step,
         cond_cost_list(cpi, cost_list), NULL, NULL, &distortion, &sse, NULL,
-        NULL, 0, 0, 0, 0, 0, 1);
+        NULL, 0, 0, 16, 16, USE_2_TAPS_ORIG, 1);
   }
 
   x->e_mbd.mi[0]->mv[0] = x->best_mv;