libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_entropy.c

 /*
  *  Copyright (c) 2010 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.
  */
 
@@ skipping 115 matching lines @@
 };
 
 const uint8_t vp9_coefband_trans_4x4[16] = {
   0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5,
 };
 
 const uint8_t vp9_pt_energy_class[ENTROPY_TOKENS] = {
   0, 1, 2, 3, 3, 4, 4, 5, 5, 5, 5, 5
 };
 
-const vp9_tree_index vp9_coefmodel_tree[TREE_SIZE(UNCONSTRAINED_NODES + 1)] = {
-  -EOB_MODEL_TOKEN, 2,
-  -ZERO_TOKEN, 4,
-  -ONE_TOKEN, -TWO_TOKEN,
-};
-
 // Model obtained from a 2-sided zero-centerd distribuition derived
 // from a Pareto distribution. The cdf of the distribution is:
 // cdf(x) = 0.5 + 0.5 * sgn(x) * [1 - {alpha/(alpha + |x|)} ^ beta]
 //
 // For a given beta and a given probablity of the 1-node, the alpha
 // is first solved, and then the {alpha, beta} pair is used to generate
 // the probabilities for the rest of the nodes.
 
 // beta = 8
 
@@ skipping 662 matching lines @@
   } else if (cm->last_frame_type == KEY_FRAME) {
     update_factor = COEF_MAX_UPDATE_FACTOR_AFTER_KEY;  /* adapt quickly */
     count_sat = COEF_COUNT_SAT_AFTER_KEY;
   } else {
     update_factor = COEF_MAX_UPDATE_FACTOR;
     count_sat = COEF_COUNT_SAT;
   }
   for (t = TX_4X4; t <= TX_32X32; t++)
     adapt_coef_probs(cm, t, count_sat, update_factor);
 }