shithub: libvpx

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Experimental change to speed 1 settings.

Allow tx search for ARF and GF helps quality but a little slower.
Setting subpel_iters_per_step to 1 improves encode speed.
Setting sf->mode_skip_start = 10 improves speed.

Initial local results suggest overall impact on quality is neutral
but encode is up to 15% faster.

Change-Id: Ibde02cae6626a44c10a1da0cefe888afbb51f037

--- a/vp9/encoder/vp9_onyx_if.c

+++ b/vp9/encoder/vp9_onyx_if.c

@@ -541,7 +541,16 @@

     sf->thresh_mult_sub8x8[THR_COMP_GA] = INT_MAX;

 }

-static void set_good_speed_feature(VP9_COMMON *cm,

+// Intra only frames, golden frames (except alt ref overlays) and

+// alt ref frames tend to be coded at a higher than ambient quality

+static INLINE int frame_is_boosted(const VP9_COMP *cpi,

+                                   const VP9_COMMON *const cm) {

+  return frame_is_intra_only(cm) || cpi->refresh_alt_ref_frame ||

+         (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref);

+}

+

+static void set_good_speed_feature(VP9_COMP *cpi,

+                                   VP9_COMMON *cm,

                                    SPEED_FEATURES *sf,

                                    int speed) {

   int i;

@@ -551,7 +560,7 @@

   if (speed == 1) {

     sf->use_square_partition_only = !frame_is_intra_only(cm);

     sf->less_rectangular_check  = 1;

-    sf->tx_size_search_method = frame_is_intra_only(cm)

+    sf->tx_size_search_method = frame_is_boosted(cpi, cm)

       ? USE_FULL_RD : USE_LARGESTALL;

     if (MIN(cm->width, cm->height) >= 720)

@@ -568,6 +577,8 @@

     sf->intra_y_mode_mask[TX_32X32] = INTRA_DC_H_V;

     sf->intra_uv_mode_mask[TX_32X32] = INTRA_DC_H_V;

     sf->intra_uv_mode_mask[TX_16X16] = INTRA_DC_H_V;

+    sf->subpel_iters_per_step = 1;

+    sf->mode_skip_start = 10;

   }

   if (speed == 2) {

     sf->use_square_partition_only = !frame_is_intra_only(cm);

@@ -937,7 +948,7 @@

     case MODE_FIRSTPASS:

     case MODE_GOODQUALITY:

     case MODE_SECONDPASS:

-      set_good_speed_feature(cm, sf, speed);

+      set_good_speed_feature(cpi, cm, sf, speed);

       break;

     case MODE_REALTIME:

       set_rt_speed_feature(cm, sf, speed);