shithub: libvpx

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vp9-rtc: Add speed feature to force SMOOTH filter

Add speed feature for real-time to always force
SMOOTH filter for subpel motion. Can be useful in some
cases for noisy content or high motion at low bitrate.
Also some speedup in avoiding the checking of two filters.

Keep it off always for now.

Change-Id: I843d79aaddef75f9c6ded60906cc75c279a6e37a

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -1690,10 +1690,7 @@

   int no_scaling = 0;

   unsigned int thresh_svc_skip_golden = 500;

   unsigned int thresh_skip_golden = 500;

-  // TODO(marpan/jianj): forcing smooth_interpol is visually better for noisy

-  // content, at low resolns. Look into adding this conditon. For now keep

-  // it off.

-  int force_smooth_filter = 0;

+  int force_smooth_filter = cpi->sf.force_smooth_interpol;

   int scene_change_detected =

       cpi->rc.high_source_sad ||

       (cpi->use_svc && cpi->svc.high_source_sad_superframe);

--- a/vp9/encoder/vp9_speed_features.c

+++ b/vp9/encoder/vp9_speed_features.c

@@ -453,6 +453,7 @@

   sf->nonrd_use_ml_partition = 0;

   sf->variance_part_thresh_mult = 1;

   sf->cb_pred_filter_search = 0;

+  sf->force_smooth_interpol = 0;

   if (speed >= 1) {

     sf->allow_txfm_domain_distortion = 1;

--- a/vp9/encoder/vp9_speed_features.h

+++ b/vp9/encoder/vp9_speed_features.h

@@ -608,6 +608,9 @@

   // Multiplier for base thresold for variance partitioning.

   int variance_part_thresh_mult;

+

+  // Force subpel motion filter to always use SMOOTH_FILTER.

+  int force_smooth_interpol;

 } SPEED_FEATURES;

 struct VP9_COMP;