libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_aq_variance.c

 /*
  *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include <math.h>
 
 #include "vp9/encoder/vp9_aq_variance.h"
 
 #include "vp9/common/vp9_seg_common.h"
 
 #include "vp9/encoder/vp9_ratectrl.h"
 #include "vp9/encoder/vp9_rd.h"
 #include "vp9/encoder/vp9_segmentation.h"
 #include "vp9/common/vp9_systemdependent.h"
 
-#define ENERGY_MIN (-1)
+#define ENERGY_MIN (-4)
 #define ENERGY_MAX (1)
 #define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN +  1)
 #define ENERGY_IN_BOUNDS(energy)\
   assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
 
 static const double rate_ratio[MAX_SEGMENTS] =
-  {1.143, 1.0, 0.875, 1.0, 1.0, 1.0, 1.0, 1.0};
-static const int segment_id[ENERGY_SPAN] = {0, 1, 2};
+  {2.5, 2.0, 1.5, 1.0, 0.75, 1.0, 1.0, 1.0};
+static const int segment_id[ENERGY_SPAN] = {0, 1, 1, 2, 3, 4};
 
 #define SEGMENT_ID(i) segment_id[(i) - ENERGY_MIN]
 
 DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = {0};
 #if CONFIG_VP9_HIGHBITDEPTH
 DECLARE_ALIGNED(16, static const uint16_t, vp9_highbd_64_zeros[64]) = {0};
 #endif
 
 unsigned int vp9_vaq_segment_id(int energy) {
   ENERGY_IN_BOUNDS(energy);
@@ skipping 100 matching lines @@
 #define DEFAULT_E_MIDPOINT 10.0
 int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
   double energy;
   double energy_midpoint;
   vp9_clear_system_state();
   energy_midpoint =
     (cpi->oxcf.pass == 2) ? cpi->twopass.mb_av_energy : DEFAULT_E_MIDPOINT;
   energy = vp9_log_block_var(cpi, x, bs) - energy_midpoint;
   return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX);
 }