tree c6a3eac192fc09518c17bbc0e48b5adc777ba4ad
parent dbaf5f64e2d1fbcf2a1953c0c3e62011eaeb8d86
author Marco <marpan@google.com> 1456418288 -0800
committer Marco <marpan@google.com> 1456876122 -0800

vp9-svc: Allow for 2 stage downscaling for spatial layers.

For 1 pass cbr mode: allow for two-stage 1:2 scaling
(which will use the 1:2 optimized scaler) if the spatial
layer is 1/4x1/4 of souce.

Without this change, the base layer for 3 spatial layers would
be using the non-normative scaler which is un-optimized/C code.

Change-Id: I9d73f92a4a96927d0f1d6bf75315c1e60513226a