commit b7bb0976b7a6d45b425ce25082c508c218ed681f
author Debargha Mukherjee <debargha@google.com> Thu Mar 09 06:47:43 2017 -0800
committer Debargha Mukherjee <debargha@google.com> Fri Mar 10 19:31:12 2017 +0000
tree f2b4b82936ddd1f2ed3e3702fada253c27a9c75f
parent bcf25cda9105758cd447a73d9457aaccad1ad365

Replace one self guided filter with highpass

Adds an option controlled by a macro to replace one of
the guided filters in the self-guided tool with a simple
bandpass filtered version generated with a 3x3 kernel.
By default the macro USE_HIGHPASS_IN_SGRPROJ is 0 (turned
off), that defaults us to the dual self-guided filter.
When the macro is turned on, the larger radius guided
filter is replaced by a simpler filter that is much faster.

Results (if USE_HIGHPASS_IN_SGRPROJ is on vs. off):
lowres: performance drop by +0.14% (BDRATE)
midres: performance drop by +0.27% (BDRATE)

Further experiments on this variation of guided filters is
pending.

Change-Id: I7bbcfcad7ee266cd49a8dc6d96795a454feb1a94