ref: 2c950e131cc180c8d8babbc89f24fc29eb542273
parent: efa786d4649cb39919170d745d4206309b463575
author: Marco <marpan@google.com>
date: Wed Jan 31 08:33:27 EST 2018
vp9-svc: Fix to initialize downsampling filters. For 3 spatial layers with 1/2 downsampling, the downsampling filter for the middle layer was not set for the very first frame, so it was defaulting to the subsample filter (no averaging/phase = 0). Its not set due to the two stage scaling that is done for 1/4 on base layer, during which the intermediate 1/2 result is saved for the middle layer. Fix for now is to set the default downsampling filter to Bilinear (averaging/non-zero phase) for all layers on init (vp9_init_layer_context):. Change-Id: Ic7407810b34c621e7e7420682508d45478bdffcf
--- a/vp9/encoder/vp9_svc_layercontext.c
+++ b/vp9/encoder/vp9_svc_layercontext.c
@@ -45,8 +45,8 @@
svc->ext_lst_fb_idx[sl] = 0;
svc->ext_gld_fb_idx[sl] = 1;
svc->ext_alt_fb_idx[sl] = 2;
- svc->downsample_filter_type[sl] = EIGHTTAP;
- svc->downsample_filter_phase[sl] = 0; // Set to 8 for averaging filter.
+ svc->downsample_filter_type[sl] = BILINEAR;
+ svc->downsample_filter_phase[sl] = 8; // Set to 8 for averaging filter.
}
if (cpi->oxcf.error_resilient_mode == 0 && cpi->oxcf.pass == 2) {