shithub: libvpx

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vp9-rtc: Speed feature changes for speed 9.

Add threshold multipler for variance partitioning
as speed feature, and increase it by 2x for speed >= 9
for resoln >= VGA. Also only allow simple_interpol
filter when avg_low_motion is below threshold.

Better tradeoff of speed/quality comparing to speed 8.

Change-Id: I6bd29ad3cced470b32d04f60771120531112a5d9

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -555,7 +555,8 @@

                                int content_state) {

   VP9_COMMON *const cm = &cpi->common;

   const int is_key_frame = frame_is_intra_only(cm);

-  const int threshold_multiplier = is_key_frame ? 20 : 1;

+  const int threshold_multiplier =

+      is_key_frame ? 20 : cpi->sf.variance_part_thresh_mult;

   int64_t threshold_base =

       (int64_t)(threshold_multiplier * cpi->y_dequant[q][1]);

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

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

@@ -451,6 +451,7 @@

   sf->enhanced_full_pixel_motion_search = 0;

   sf->use_accurate_subpel_search = USE_2_TAPS;

   sf->nonrd_use_ml_partition = 0;

+  sf->variance_part_thresh_mult = 1;

   if (speed >= 1) {

     sf->allow_txfm_domain_distortion = 1;

@@ -760,7 +761,8 @@

       sf->disable_16x16part_nonkey = 1;

     // Allow for disabling GOLDEN reference, for CBR mode.

     if (cpi->oxcf.rc_mode == VPX_CBR) sf->disable_golden_ref = 1;

-    sf->default_interp_filter = BILINEAR;

+    if (cpi->rc.avg_frame_low_motion < 70) sf->default_interp_filter = BILINEAR;

+    if (cm->width * cm->height >= 640 * 360) sf->variance_part_thresh_mult = 2;

   }

   if (sf->nonrd_use_ml_partition)

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

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

@@ -605,6 +605,9 @@

   // Use machine learning based partition search.

   int nonrd_use_ml_partition;

+

+  // Multiplier for base thresold for variance partitioning.

+  int variance_part_thresh_mult;

 } SPEED_FEATURES;

 struct VP9_COMP;