/*
 * Copyright (c) 2021, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 3-Clause Clear License
 * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
 * License was not distributed with this source code in the LICENSE file, you
 * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/.  If the
 * Alliance for Open Media Patent License 1.0 was not distributed with this
 * source code in the PATENTS file, you can obtain it at
 * aomedia.org/license/patent-license/.
 */

#ifndef AOM_AOM_DSP_PROB_H_
#define AOM_AOM_DSP_PROB_H_

#include <assert.h>
#include <stdio.h>

#include "config/aom_config.h"

#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/entcode.h"
#include "aom_ports/bitops.h"
#include "aom_ports/mem.h"

typedef uint16_t aom_cdf_prob;

#define EC_PROB_SHIFT 7
#define EC_MIN_PROB 4  // must be <= (1<<EC_PROB_SHIFT)/16

#define CDF_SIZE(x) ((x) + 2)
#define NUM_PARA_COMBINATIONS 125
#define NUM_PARA_INTERVALS 3
#define CDF_PROB_BITS 15
#define CDF_PROB_TOP (1 << CDF_PROB_BITS)
#define CDF_INIT_TOP 32768
#define CDF_SHIFT (15 - CDF_PROB_BITS)
/*The value stored in an iCDF is CDF_PROB_TOP minus the actual cumulative
  probability (an "inverse" CDF).
  This function converts from one representation to the other (and is its own
  inverse).*/
#define AOM_ICDF(x) (CDF_PROB_TOP - (x))

#if CDF_SHIFT == 0

#define AOM_CDF2(a0) AOM_ICDF(a0), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF3(a0, a1) AOM_ICDF(a0), AOM_ICDF(a1), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF4(a0, a1, a2) \
  AOM_ICDF(a0), AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF5(a0, a1, a2, a3) \
  AOM_ICDF(a0)                   \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF6(a0, a1, a2, a3, a4)                        \
  AOM_ICDF(a0)                                              \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF7(a0, a1, a2, a3, a4, a5)                                  \
  AOM_ICDF(a0)                                                            \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5), \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF8(a0, a1, a2, a3, a4, a5, a6)                              \
  AOM_ICDF(a0)                                                            \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5), \
      AOM_ICDF(a6), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF9(a0, a1, a2, a3, a4, a5, a6, a7)                          \
  AOM_ICDF(a0)                                                            \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5), \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF10(a0, a1, a2, a3, a4, a5, a6, a7, a8)                     \
  AOM_ICDF(a0)                                                            \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5), \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF11(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)                 \
  AOM_ICDF(a0)                                                            \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5), \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9),             \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF12(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)               \
  AOM_ICDF(a0)                                                               \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5),    \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9), AOM_ICDF(a10), \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF13(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11)          \
  AOM_ICDF(a0)                                                               \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5),    \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9), AOM_ICDF(a10), \
      AOM_ICDF(a11), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF14(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12)     \
  AOM_ICDF(a0)                                                               \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5),    \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9), AOM_ICDF(a10), \
      AOM_ICDF(a11), AOM_ICDF(a12), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF15(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13) \
  AOM_ICDF(a0)                                                                \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5),     \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9), AOM_ICDF(a10),  \
      AOM_ICDF(a11), AOM_ICDF(a12), AOM_ICDF(a13), AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF16(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, \
                  a14)                                                        \
  AOM_ICDF(a0)                                                                \
  , AOM_ICDF(a1), AOM_ICDF(a2), AOM_ICDF(a3), AOM_ICDF(a4), AOM_ICDF(a5),     \
      AOM_ICDF(a6), AOM_ICDF(a7), AOM_ICDF(a8), AOM_ICDF(a9), AOM_ICDF(a10),  \
      AOM_ICDF(a11), AOM_ICDF(a12), AOM_ICDF(a13), AOM_ICDF(a14),             \
      AOM_ICDF(CDF_PROB_TOP), 0

#else
#define AOM_CDF2(a0)                                         \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 2) + \
            ((CDF_INIT_TOP - 2) >> 1)) /                     \
               ((CDF_INIT_TOP - 2)) +                        \
           1)                                                \
  , AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF3(a0, a1)                                         \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 3) +     \
            ((CDF_INIT_TOP - 3) >> 1)) /                         \
               ((CDF_INIT_TOP - 3)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 3) + \
                ((CDF_INIT_TOP - 3) >> 1)) /                     \
                   ((CDF_INIT_TOP - 3)) +                        \
               2),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF4(a0, a1, a2)                                     \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 4) +     \
            ((CDF_INIT_TOP - 4) >> 1)) /                         \
               ((CDF_INIT_TOP - 4)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 4) + \
                ((CDF_INIT_TOP - 4) >> 1)) /                     \
                   ((CDF_INIT_TOP - 4)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 4) + \
                ((CDF_INIT_TOP - 4) >> 1)) /                     \
                   ((CDF_INIT_TOP - 4)) +                        \
               3),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF5(a0, a1, a2, a3)                                 \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 5) +     \
            ((CDF_INIT_TOP - 5) >> 1)) /                         \
               ((CDF_INIT_TOP - 5)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 5) + \
                ((CDF_INIT_TOP - 5) >> 1)) /                     \
                   ((CDF_INIT_TOP - 5)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 5) + \
                ((CDF_INIT_TOP - 5) >> 1)) /                     \
                   ((CDF_INIT_TOP - 5)) +                        \
               3),                                               \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 5) + \
                ((CDF_INIT_TOP - 5) >> 1)) /                     \
                   ((CDF_INIT_TOP - 5)) +                        \
               4),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF6(a0, a1, a2, a3, a4)                             \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 6) +     \
            ((CDF_INIT_TOP - 6) >> 1)) /                         \
               ((CDF_INIT_TOP - 6)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 6) + \
                ((CDF_INIT_TOP - 6) >> 1)) /                     \
                   ((CDF_INIT_TOP - 6)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 6) + \
                ((CDF_INIT_TOP - 6) >> 1)) /                     \
                   ((CDF_INIT_TOP - 6)) +                        \
               3),                                               \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 6) + \
                ((CDF_INIT_TOP - 6) >> 1)) /                     \
                   ((CDF_INIT_TOP - 6)) +                        \
               4),                                               \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 6) + \
                ((CDF_INIT_TOP - 6) >> 1)) /                     \
                   ((CDF_INIT_TOP - 6)) +                        \
               5),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF7(a0, a1, a2, a3, a4, a5)                         \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) +     \
            ((CDF_INIT_TOP - 7) >> 1)) /                         \
               ((CDF_INIT_TOP - 7)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) + \
                ((CDF_INIT_TOP - 7) >> 1)) /                     \
                   ((CDF_INIT_TOP - 7)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) + \
                ((CDF_INIT_TOP - 7) >> 1)) /                     \
                   ((CDF_INIT_TOP - 7)) +                        \
               3),                                               \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) + \
                ((CDF_INIT_TOP - 7) >> 1)) /                     \
                   ((CDF_INIT_TOP - 7)) +                        \
               4),                                               \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) + \
                ((CDF_INIT_TOP - 7) >> 1)) /                     \
                   ((CDF_INIT_TOP - 7)) +                        \
               5),                                               \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 7) + \
                ((CDF_INIT_TOP - 7) >> 1)) /                     \
                   ((CDF_INIT_TOP - 7)) +                        \
               6),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF8(a0, a1, a2, a3, a4, a5, a6)                     \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) +     \
            ((CDF_INIT_TOP - 8) >> 1)) /                         \
               ((CDF_INIT_TOP - 8)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               3),                                               \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               4),                                               \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               5),                                               \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               6),                                               \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 8) + \
                ((CDF_INIT_TOP - 8) >> 1)) /                     \
                   ((CDF_INIT_TOP - 8)) +                        \
               7),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF9(a0, a1, a2, a3, a4, a5, a6, a7)                 \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) +     \
            ((CDF_INIT_TOP - 9) >> 1)) /                         \
               ((CDF_INIT_TOP - 9)) +                            \
           1)                                                    \
  ,                                                              \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               2),                                               \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               3),                                               \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               4),                                               \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               5),                                               \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               6),                                               \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               7),                                               \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 9) + \
                ((CDF_INIT_TOP - 9) >> 1)) /                     \
                   ((CDF_INIT_TOP - 9)) +                        \
               8),                                               \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF10(a0, a1, a2, a3, a4, a5, a6, a7, a8)             \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) +     \
            ((CDF_INIT_TOP - 10) >> 1)) /                         \
               ((CDF_INIT_TOP - 10)) +                            \
           1)                                                     \
  ,                                                               \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               2),                                                \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               3),                                                \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               4),                                                \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               5),                                                \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               6),                                                \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               7),                                                \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               8),                                                \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 10) + \
                ((CDF_INIT_TOP - 10) >> 1)) /                     \
                   ((CDF_INIT_TOP - 10)) +                        \
               9),                                                \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF11(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)          \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +      \
            ((CDF_INIT_TOP - 11) >> 1)) /                          \
               ((CDF_INIT_TOP - 11)) +                             \
           1)                                                      \
  ,                                                                \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               2),                                                 \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               3),                                                 \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               4),                                                 \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               5),                                                 \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               6),                                                 \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               7),                                                 \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               8),                                                 \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) +  \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               9),                                                 \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 11) + \
                ((CDF_INIT_TOP - 11) >> 1)) /                      \
                   ((CDF_INIT_TOP - 11)) +                         \
               10),                                                \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF12(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)      \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +       \
            ((CDF_INIT_TOP - 12) >> 1)) /                           \
               ((CDF_INIT_TOP - 12)) +                              \
           1)                                                       \
  ,                                                                 \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               2),                                                  \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               3),                                                  \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               4),                                                  \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               5),                                                  \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               6),                                                  \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               7),                                                  \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               8),                                                  \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +   \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               9),                                                  \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) +  \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               10),                                                 \
      AOM_ICDF((((a10) - 11) * ((CDF_INIT_TOP >> CDF_SHIFT) - 12) + \
                ((CDF_INIT_TOP - 12) >> 1)) /                       \
                   ((CDF_INIT_TOP - 12)) +                          \
               11),                                                 \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF13(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11) \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +       \
            ((CDF_INIT_TOP - 13) >> 1)) /                           \
               ((CDF_INIT_TOP - 13)) +                              \
           1)                                                       \
  ,                                                                 \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               2),                                                  \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               3),                                                  \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               4),                                                  \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               5),                                                  \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               6),                                                  \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               7),                                                  \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               8),                                                  \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +   \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               9),                                                  \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) +  \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               10),                                                 \
      AOM_ICDF((((a10) - 11) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) + \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               11),                                                 \
      AOM_ICDF((((a11) - 12) * ((CDF_INIT_TOP >> CDF_SHIFT) - 13) + \
                ((CDF_INIT_TOP - 13) >> 1)) /                       \
                   ((CDF_INIT_TOP - 13)) +                          \
               12),                                                 \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF14(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12) \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +            \
            ((CDF_INIT_TOP - 14) >> 1)) /                                \
               ((CDF_INIT_TOP - 14)) +                                   \
           1)                                                            \
  ,                                                                      \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               2),                                                       \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               3),                                                       \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               4),                                                       \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               5),                                                       \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               6),                                                       \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               7),                                                       \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               8),                                                       \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +        \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               9),                                                       \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +       \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               10),                                                      \
      AOM_ICDF((((a10) - 11) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +      \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               11),                                                      \
      AOM_ICDF((((a11) - 12) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +      \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               12),                                                      \
      AOM_ICDF((((a12) - 13) * ((CDF_INIT_TOP >> CDF_SHIFT) - 14) +      \
                ((CDF_INIT_TOP - 14) >> 1)) /                            \
                   ((CDF_INIT_TOP - 14)) +                               \
               13),                                                      \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF15(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13) \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +                 \
            ((CDF_INIT_TOP - 15) >> 1)) /                                     \
               ((CDF_INIT_TOP - 15)) +                                        \
           1)                                                                 \
  ,                                                                           \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               2),                                                            \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               3),                                                            \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               4),                                                            \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               5),                                                            \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               6),                                                            \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               7),                                                            \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               8),                                                            \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +             \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               9),                                                            \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +            \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               10),                                                           \
      AOM_ICDF((((a10) - 11) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +           \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               11),                                                           \
      AOM_ICDF((((a11) - 12) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +           \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               12),                                                           \
      AOM_ICDF((((a12) - 13) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +           \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               13),                                                           \
      AOM_ICDF((((a13) - 14) * ((CDF_INIT_TOP >> CDF_SHIFT) - 15) +           \
                ((CDF_INIT_TOP - 15) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 15)) +                                    \
               14),                                                           \
      AOM_ICDF(CDF_PROB_TOP), 0
#define AOM_CDF16(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, \
                  a14)                                                        \
  AOM_ICDF((((a0) - 1) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +                 \
            ((CDF_INIT_TOP - 16) >> 1)) /                                     \
               ((CDF_INIT_TOP - 16)) +                                        \
           1)                                                                 \
  ,                                                                           \
      AOM_ICDF((((a1) - 2) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               2),                                                            \
      AOM_ICDF((((a2) - 3) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               3),                                                            \
      AOM_ICDF((((a3) - 4) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               4),                                                            \
      AOM_ICDF((((a4) - 5) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               5),                                                            \
      AOM_ICDF((((a5) - 6) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               6),                                                            \
      AOM_ICDF((((a6) - 7) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               7),                                                            \
      AOM_ICDF((((a7) - 8) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               8),                                                            \
      AOM_ICDF((((a8) - 9) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +             \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               9),                                                            \
      AOM_ICDF((((a9) - 10) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +            \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               10),                                                           \
      AOM_ICDF((((a10) - 11) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +           \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               11),                                                           \
      AOM_ICDF((((a11) - 12) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +           \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               12),                                                           \
      AOM_ICDF((((a12) - 13) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +           \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               13),                                                           \
      AOM_ICDF((((a13) - 14) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +           \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               14),                                                           \
      AOM_ICDF((((a14) - 15) * ((CDF_INIT_TOP >> CDF_SHIFT) - 16) +           \
                ((CDF_INIT_TOP - 16) >> 1)) /                                 \
                   ((CDF_INIT_TOP - 16)) +                                    \
               15),                                                           \
      AOM_ICDF(CDF_PROB_TOP), 0

#endif

static INLINE uint8_t get_prob(unsigned int num, unsigned int den) {
  assert(den != 0);
  {
    const int p = (int)(((uint64_t)num * 256 + (den >> 1)) / den);
    // (p > 255) ? 255 : (p < 1) ? 1 : p;
    const int clipped_prob = p | ((255 - p) >> 23) | (p == 0);
    return (uint8_t)clipped_prob;
  }
}

/* para_adjustment_list array defines all possible triplets of adjustment
 parameters allowed in PARA method. The first entry with {0, 0, 0} corresponds
 to the default setting where no adjustment is made for the speed of adaptation.
 Note: Developers may use the default (0) value for newly introduced contexts.
 As an example, for the newly introduced default_stx_set_cdf table below, 0
 values are added to explicitly set to default rate adaptation.
 ----------------------------------------------------------------------------
 static const aom_cdf_prob
       default_stx_set_cdf[IST_DIR_SIZE][CDF_SIZE(IST_DIR_SIZE)] = {
         { AOM_CDF7(32744, 32748, 32752, 32756, 32760, 32764), 0 },
         { AOM_CDF7(4, 32748, 32752, 32756, 32760, 32764), 0 },
         { AOM_CDF7(4, 8, 32752, 32756, 32760, 32764), 0 },
         { AOM_CDF7(4, 8, 12, 32756, 32760, 32764), 0 },
         { AOM_CDF7(4, 8, 12, 16, 32760, 32764), 0 },
         { AOM_CDF7(4, 8, 12, 16, 20, 32764), 0 },
         { AOM_CDF7(4, 8, 12, 16, 20, 24), 0 },
       };
 ----------------------------------------------------------------------------
 */
static const int
    para_adjustment_list[NUM_PARA_COMBINATIONS][NUM_PARA_INTERVALS] = {
      { 0, 0, 0 },    { 0, 0, -1 },   { 0, 0, -2 },   { 0, 0, 1 },
      { 0, 0, 1 },    { 0, -1, 0 },   { 0, -1, -1 },  { 0, -1, -2 },
      { 0, -1, 1 },   { 0, -1, 1 },   { 0, -2, 0 },   { 0, -2, -1 },
      { 0, -2, -2 },  { 0, -2, 1 },   { 0, -2, 1 },   { 0, 1, 0 },
      { 0, 1, -1 },   { 0, 1, -2 },   { 0, 1, 1 },    { 0, 1, 1 },
      { 0, 1, 0 },    { 0, 1, -1 },   { 0, 1, -2 },   { 0, 1, 1 },
      { 0, 1, 1 },    { -1, 0, 0 },   { -1, 0, -1 },  { -1, 0, -2 },
      { -1, 0, 1 },   { -1, 0, 1 },   { -1, -1, 0 },  { -1, -1, -1 },
      { -1, -1, -2 }, { -1, -1, 1 },  { -1, -1, 1 },  { -1, -2, 0 },
      { -1, -2, -1 }, { -1, -2, -2 }, { -1, -2, 1 },  { -1, -2, 1 },
      { -1, 1, 0 },   { -1, 1, -1 },  { -1, 1, -2 },  { -1, 1, 1 },
      { -1, 1, 1 },   { -1, 1, 0 },   { -1, 1, -1 },  { -1, 1, -2 },
      { -1, 1, 1 },   { -1, 1, 1 },   { -2, 0, 0 },   { -2, 0, -1 },
      { -2, 0, -2 },  { -2, 0, 1 },   { -2, 0, 1 },   { -2, -1, 0 },
      { -2, -1, -1 }, { -2, -1, -2 }, { -2, -1, 1 },  { -2, -1, 1 },
      { -2, -2, 0 },  { -2, -2, -1 }, { -2, -2, -2 }, { -2, -2, 1 },
      { -2, -2, 1 },  { -2, 1, 0 },   { -2, 1, -1 },  { -2, 1, -2 },
      { -2, 1, 1 },   { -2, 1, 1 },   { -2, 1, 0 },   { -2, 1, -1 },
      { -2, 1, -2 },  { -2, 1, 1 },   { -2, 1, 1 },   { 1, 0, 0 },
      { 1, 0, -1 },   { 1, 0, -2 },   { 1, 0, 1 },    { 1, 0, 1 },
      { 1, -1, 0 },   { 1, -1, -1 },  { 1, -1, -2 },  { 1, -1, 1 },
      { 1, -1, 1 },   { 1, -2, 0 },   { 1, -2, -1 },  { 1, -2, -2 },
      { 1, -2, 1 },   { 1, -2, 1 },   { 1, 1, 0 },    { 1, 1, -1 },
      { 1, 1, -2 },   { 1, 1, 1 },    { 1, 1, 1 },    { 1, 1, 0 },
      { 1, 1, -1 },   { 1, 1, -2 },   { 1, 1, 1 },    { 1, 1, 1 },
      { 1, 0, 0 },    { 1, 0, -1 },   { 1, 0, -2 },   { 1, 0, 1 },
      { 1, 0, 1 },    { 1, -1, 0 },   { 1, -1, -1 },  { 1, -1, -2 },
      { 1, -1, 1 },   { 1, -1, 1 },   { 1, -2, 0 },   { 1, -2, -1 },
      { 1, -2, -2 },  { 1, -2, 1 },   { 1, -2, 1 },   { 1, 1, 0 },
      { 1, 1, -1 },   { 1, 1, -2 },   { 1, 1, 1 },    { 1, 1, 1 },
      { 1, 1, 0 },    { 1, 1, -1 },   { 1, 1, -2 },   { 1, 1, 1 },
      { 1, 1, 1 },
    };

static INLINE void update_cdf(aom_cdf_prob *cdf, int8_t val, int nsymbs) {
  int rate;
  int i, tmp;

  static const int nsymbs2speed[17] = { 0, 0, 1, 1, 2, 2, 2, 2, 2,
                                        2, 2, 2, 2, 2, 2, 2, 2 };
  assert(nsymbs < 17);
  const int time_interval = cdf[nsymbs] > 31 ? 2 : cdf[nsymbs] > 15 ? 1 : 0;
  rate = 3 + time_interval + nsymbs2speed[nsymbs] +
         para_adjustment_list[cdf[nsymbs + 1]][time_interval];
  tmp = AOM_ICDF(0);

  // Single loop (faster)
  for (i = 0; i < nsymbs - 1; ++i) {
    tmp = (i == val) ? 0 : tmp;
    if (tmp < cdf[i]) {
      cdf[i] -= ((cdf[i] - tmp) >> rate);
    } else {
      cdf[i] += ((tmp - cdf[i]) >> rate);
    }
  }
  cdf[nsymbs] += (cdf[nsymbs] < 32);
}

// Scale the CDF to match the range value stored in the entropy decoder.
static INLINE unsigned od_ec_prob_scale(uint16_t p, unsigned r, int n,
                                        int nsym) {
  int rr = r >> 8;
  int pp = p >> EC_PROB_SHIFT;
  pp <<= 4;
  pp += av1_prob_inc_tbl[nsym - 2][n];
  return ((rr * pp >> (7 - EC_PROB_SHIFT - CDF_SHIFT + 1 + 6)) << 3);
}

// Adjust probability to more closely match the scaled prob used in
// od_ec_prob_scale()
static INLINE unsigned get_adjusted_prob(uint16_t p, int n, int nsym) {
  int adj_prob = (p >> EC_PROB_SHIFT) << EC_PROB_SHIFT;
  int inc = av1_prob_inc_tbl[nsym - 2][n];
  adj_prob += inc << (EC_PROB_SHIFT - 4);
  return adj_prob;
}

#endif  // AOM_AOM_DSP_PROB_H_