Marco 4e23998fb4 vp9: SVC: Add option to set downsampling filter type.
Add option in SVC to set the filter type and phase for
the frame level downsampling filters.

For 3 spatial layers: set downsampling filter type to bilinear
and set phase to 8, for lowest spatial layer.

Change-Id: Id81f4b1ba93db19c1cd37b6a46d1281a2c61bc43
2017-05-09 17:22:44 -07:00
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