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vp9-svc: Fix to initialize downsampling filters.

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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
This commit is contained in:
Marco
2018-01-31 13:33:27 -08:00
parent efa786d464
commit 2c950e131c
1 changed files with 2 additions and 2 deletions
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4
vp9/encoder/vp9_svc_layercontext.c
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@@ -45,8 +45,8 @@ void vp9_init_layer_context(VP9_COMP *const cpi) {
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) {