shithub: libvpx

Download patch

ref: 2fbdfd2c66f987cf4c0e4c870b6a04c4ad49ef5c
parent: 681d5e9024c7dab82706507037c01a067e0ea89d
author: Jingning Han <jingning@google.com>
date: Thu Nov 20 06:28:00 EST 2014 

Key frame non-RD mode decision process

This commit makes a non-RD coding mode decision process for key
frame coding. It can be optionally turned on in speed -6 and above.

Change-Id: I0847258b392877a0210b4768bef88ebc9ad009b5


--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -2601,7 +2601,9 @@
     if (mbmi->segment_id)
       x->rdmult = vp9_cyclic_refresh_get_rdmult(cpi->cyclic_refresh);
 
-  if (vp9_segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP))
+  if (cm->frame_type == KEY_FRAME)
+    vp9_pick_intra_mode(cpi, x, rd_cost, bsize, ctx);
+  else if (vp9_segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP))
     set_mode_info_seg_skip(x, cm->tx_mode, rd_cost, bsize);
   else
     vp9_pick_inter_mode(cpi, x, tile_data, mi_row, mi_col,
@@ -3456,7 +3458,7 @@
 
       for (mi_row = tile_info->mi_row_start; mi_row < tile_info->mi_row_end;
            mi_row += MI_BLOCK_SIZE) {
-        if (cpi->sf.use_nonrd_pick_mode && !frame_is_intra_only(cm))
+        if (cpi->sf.use_nonrd_pick_mode)
           encode_nonrd_sb_row(cpi, this_tile, mi_row, &tok[tile_row][tile_col]);
         else
           encode_rd_sb_row(cpi, this_tile, mi_row, &tok[tile_row][tile_col]);
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -464,6 +464,57 @@
   DC_PRED, V_PRED, H_PRED, TM_PRED
 };
 
+void vp9_pick_intra_mode(VP9_COMP *cpi, MACROBLOCK *x, RD_COST *rd_cost,
+                         BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx) {
+  MACROBLOCKD *const xd = &x->e_mbd;
+  MB_MODE_INFO *const mbmi = &xd->mi[0].src_mi->mbmi;
+  RD_COST this_rdc, best_rdc;
+  PREDICTION_MODE this_mode;
+  struct estimate_block_intra_args args = { cpi, x, DC_PRED, 0, 0 };
+  const TX_SIZE intra_tx_size =
+      MIN(max_txsize_lookup[bsize],
+          tx_mode_to_biggest_tx_size[cpi->common.tx_mode]);
+  MODE_INFO *const mic = xd->mi[0].src_mi;
+  int *bmode_costs;
+  const MODE_INFO *above_mi = xd->mi[-xd->mi_stride].src_mi;
+  const MODE_INFO *left_mi = xd->left_available ? xd->mi[-1].src_mi : NULL;
+  const PREDICTION_MODE A = vp9_above_block_mode(mic, above_mi, 0);
+  const PREDICTION_MODE L = vp9_left_block_mode(mic, left_mi, 0);
+  bmode_costs = cpi->y_mode_costs[A][L];
+
+  (void) ctx;
+  vp9_rd_cost_reset(&best_rdc);
+  vp9_rd_cost_reset(&this_rdc);
+
+  mbmi->ref_frame[0] = INTRA_FRAME;
+  mbmi->mv[0].as_int = INVALID_MV;
+  mbmi->uv_mode = DC_PRED;
+  vpx_memset(x->skip_txfm, 0, sizeof(x->skip_txfm));
+
+  // Change the limit of this loop to add other intra prediction
+  // mode tests.
+  for (this_mode = DC_PRED; this_mode <= H_PRED; ++this_mode) {
+    args.mode = this_mode;
+    args.rate = 0;
+    args.dist = 0;
+    mbmi->tx_size = intra_tx_size;
+    vp9_foreach_transformed_block_in_plane(xd, bsize, 0,
+                                           estimate_block_intra, &args);
+    this_rdc.rate = args.rate;
+    this_rdc.dist = args.dist;
+    this_rdc.rate += bmode_costs[this_mode];
+    this_rdc.rdcost = RDCOST(x->rdmult, x->rddiv,
+                             this_rdc.rate, this_rdc.dist);
+
+    if (this_rdc.rdcost < best_rdc.rdcost) {
+      best_rdc = this_rdc;
+      mbmi->mode = this_mode;
+    }
+  }
+
+  *rd_cost = best_rdc;
+}
+
 // TODO(jingning) placeholder for inter-frame non-RD mode decision.
 // this needs various further optimizations. to be continued..
 void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
--- a/vp9/encoder/vp9_pickmode.h
+++ b/vp9/encoder/vp9_pickmode.h
@@ -17,6 +17,9 @@
 extern "C" {
 #endif
 
+void vp9_pick_intra_mode(VP9_COMP *cpi, MACROBLOCK *x, RD_COST *rd_cost,
+                         BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx);
+
 void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
                          TileDataEnc *tile_data,
                          int mi_row, int mi_col, RD_COST *rd_cost,
--- a/vp9/encoder/vp9_speed_features.c
+++ b/vp9/encoder/vp9_speed_features.c
@@ -294,7 +294,7 @@
         (frames_since_key % (sf->last_partitioning_redo_frequency << 1) == 1);
     sf->max_delta_qindex = is_keyframe ? 20 : 15;
     sf->partition_search_type = REFERENCE_PARTITION;
-    sf->use_nonrd_pick_mode = 1;
+    sf->use_nonrd_pick_mode = !is_keyframe;
     sf->allow_skip_recode = 0;
     sf->inter_mode_mask[BLOCK_32X32] = INTER_NEAREST_NEW_ZERO;
     sf->inter_mode_mask[BLOCK_32X64] = INTER_NEAREST_NEW_ZERO;
@@ -319,6 +319,9 @@
   if (speed >= 6) {
     // Adaptively switch between SOURCE_VAR_BASED_PARTITION and FIXED_PARTITION.
     sf->partition_search_type = VAR_BASED_PARTITION;
+
+    // Turn on this to use non-RD key frame coding mode.
+    // sf->use_nonrd_pick_mode = 1;
     sf->search_type_check_frequency = 50;
     sf->mv.search_method = NSTEP;
     sf->tx_size_search_method = is_keyframe ? USE_LARGESTALL : USE_TX_8X8;