shithub: libvpx

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vp9: Some speed feature settings for speed 9.

Disable 8x8 blocks for higher resolutions,
reduce mv_thresh for 1/2 subpel motion, and
disable golden reference at superblock level
based on source sad and motion content.

~6% loss in RTC metrics over current speed 9.
Speedup about ~10% for high motion clip on linux.

Change-Id: I7ff8f81ac93ee8a90d5a1f4837c955d000bd75e7

--- a/test/vp9_datarate_test.cc

+++ b/test/vp9_datarate_test.cc

@@ -266,7 +266,7 @@

   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));

   ASSERT_GE(effective_datarate_[0], cfg_.rc_target_bitrate * 0.75)

       << " The datarate for the file is lower than target by too much!";

-  ASSERT_LE(effective_datarate_[0], cfg_.rc_target_bitrate * 1.35)

+  ASSERT_LE(effective_datarate_[0], cfg_.rc_target_bitrate * 1.36)

       << " The datarate for the file is greater than target by too much!";

 }

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

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

@@ -583,6 +583,7 @@

     } else {

       thresholds[1] = (5 * threshold_base) >> 1;

     }

+    if (cpi->sf.disable_16x16part_nonkey) thresholds[2] = INT64_MAX;

   }

 }

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

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

@@ -1660,6 +1660,10 @@

     }

   }

+  if (sf->disable_golden_ref && (x->content_state_sb != kVeryHighSad ||

+                                 cpi->rc.avg_frame_low_motion < 60))

+    usable_ref_frame = LAST_FRAME;

+

   if (!((cpi->ref_frame_flags & flag_list[GOLDEN_FRAME]) &&

         !svc_force_zero_mode[GOLDEN_FRAME - 1] && !force_skip_low_temp_var))

     use_golden_nonzeromv = 0;

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

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

@@ -375,6 +375,8 @@

   sf->nonrd_keyframe = 0;

   sf->svc_use_lowres_part = 0;

   sf->re_encode_overshoot_rt = 0;

+  sf->disable_16x16part_nonkey = 0;

+  sf->disable_golden_ref = 0;

   if (speed >= 1) {

     sf->allow_txfm_domain_distortion = 1;

@@ -671,8 +673,15 @@

   if (speed >= 9) {

     sf->mv.enable_adaptive_subpel_force_stop = 1;

     sf->mv.adapt_subpel_force_stop.mv_thresh = 2;

+    if (cpi->rc.avg_frame_low_motion < 40)

+      sf->mv.adapt_subpel_force_stop.mv_thresh = 1;

     sf->mv.adapt_subpel_force_stop.force_stop_below = 1;

     sf->mv.adapt_subpel_force_stop.force_stop_above = 2;

+    // Disable partition blocks below 16x16, except for low-resolutions.

+    if (cm->frame_type != KEY_FRAME && cm->width >= 320 && cm->height >= 240)

+      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;

   }

   if (sf->use_altref_onepass) {

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

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

@@ -531,6 +531,12 @@

   // Enable re-encoding on scene change with potential high overshoot,

   // for real-time encoding flow.

   int re_encode_overshoot_rt;

+

+  // Disable partitioning of 16x16 blocks.

+  int disable_16x16part_nonkey;

+

+  // Allow for disabling golden reference.

+  int disable_golden_ref;

 } SPEED_FEATURES;

 struct VP9_COMP;