shithub: libvpx

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Added a speed feature controlling a motion search parameter

This commit added a speed feature to control the step_param used in
full pixel motion search. The intention is to reduced the search
steps for high speed real time coding.

Change-Id: I21d2f0105c2b647783a6688615da7fcf2b6d670b

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

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

@@ -141,7 +141,7 @@

   // TODO(jingning) exploiting adaptive motion search control in non-RD

   // mode decision too.

-  step_param = 6;

+  step_param = cpi->sf.mv.fullpel_search_step_param;

   for (i = LAST_FRAME; i <= LAST_FRAME && cpi->common.show_frame; ++i) {

     if ((x->pred_mv_sad[ref] >> 3) > x->pred_mv_sad[i]) {

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

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

@@ -283,6 +283,7 @@

   }

   if (speed >= 7) {

     sf->use_quant_fp = cm->frame_type == KEY_FRAME ? 0 : 1;

+    sf->mv.fullpel_search_step_param = 10;

     sf->lpf_pick = LPF_PICK_MINIMAL_LPF;

     sf->encode_breakout_thresh = (MIN(cm->width, cm->height) >= 720) ?

         800 : 300;

@@ -312,6 +313,7 @@

   sf->mv.reduce_first_step_size = 0;

   sf->mv.auto_mv_step_size = 0;

   sf->mv.max_step_search_steps = MAX_MVSEARCH_STEPS;

+  sf->mv.fullpel_search_step_param = 6;

   sf->comp_inter_joint_search_thresh = BLOCK_4X4;

   sf->adaptive_rd_thresh = 0;

   sf->use_lastframe_partitioning = LAST_FRAME_PARTITION_OFF;

@@ -359,7 +361,6 @@

   sf->search_type_check_frequency = 50;

   sf->encode_breakout_thresh = 0;

   sf->elevate_newmv_thresh = 0;

-

   // Recode loop tolerence %.

   sf->recode_tolerance = 25;

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

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

@@ -162,6 +162,9 @@

   // Control when to stop subpel search

   int subpel_force_stop;

+

+  // This variable sets the step_param used in full pel motion search.

+  int fullpel_search_step_param;

 } MV_SPEED_FEATURES;

 typedef struct SPEED_FEATURES {