text: /*
   *  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.
   */
  
  
  #ifndef VP10_COMMON_ENTROPYMV_H_
  #define VP10_COMMON_ENTROPYMV_H_
  
  #include "./vpx_config.h"
  
  #include "vpx_dsp/prob.h"
  
  #include "vp10/common/mv.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  struct VP10Common;
  
  void vp10_init_mv_probs(struct VP10Common *cm);
  
  void vp10_adapt_mv_probs(struct VP10Common *cm, int usehp);
  int vp10_use_mv_hp(const MV *ref);
  
  #define MV_UPDATE_PROB 252
  
  /* Symbols for coding which components are zero jointly */
  #define MV_JOINTS     4
  typedef enum {
    MV_JOINT_ZERO = 0,             /* Zero vector */
    MV_JOINT_HNZVZ = 1,            /* Vert zero, hor nonzero */
    MV_JOINT_HZVNZ = 2,            /* Hor zero, vert nonzero */
    MV_JOINT_HNZVNZ = 3,           /* Both components nonzero */
  } MV_JOINT_TYPE;
  
  static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
    return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
  }
  
  static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
    return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
  }
  
  /* Symbols for coding magnitude class of nonzero components */
  #define MV_CLASSES     11
  typedef enum {
    MV_CLASS_0 = 0,      /* (0, 2]     integer pel */
    MV_CLASS_1 = 1,      /* (2, 4]     integer pel */
    MV_CLASS_2 = 2,      /* (4, 8]     integer pel */
    MV_CLASS_3 = 3,      /* (8, 16]    integer pel */
    MV_CLASS_4 = 4,      /* (16, 32]   integer pel */
    MV_CLASS_5 = 5,      /* (32, 64]   integer pel */
    MV_CLASS_6 = 6,      /* (64, 128]  integer pel */
    MV_CLASS_7 = 7,      /* (128, 256] integer pel */
    MV_CLASS_8 = 8,      /* (256, 512] integer pel */
    MV_CLASS_9 = 9,      /* (512, 1024] integer pel */
    MV_CLASS_10 = 10,    /* (1024,2048] integer pel */
  } MV_CLASS_TYPE;
  
  #define CLASS0_BITS    1  /* bits at integer precision for class 0 */
  #define CLASS0_SIZE    (1 << CLASS0_BITS)
  #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
  #define MV_FP_SIZE 4
  
  #define MV_MAX_BITS    (MV_CLASSES + CLASS0_BITS + 2)
  #define MV_MAX         ((1 << MV_MAX_BITS) - 1)
  #define MV_VALS        ((MV_MAX << 1) + 1)
  
  #define MV_IN_USE_BITS 14
  #define MV_UPP   ((1 << MV_IN_USE_BITS) - 1)
  #define MV_LOW   (-(1 << MV_IN_USE_BITS))
  
  extern const vpx_tree_index vp10_mv_joint_tree[];
  extern const vpx_tree_index vp10_mv_class_tree[];
  extern const vpx_tree_index vp10_mv_class0_tree[];
  extern const vpx_tree_index vp10_mv_fp_tree[];
  
  typedef struct {
    vpx_prob sign;
    vpx_prob classes[MV_CLASSES - 1];
    vpx_prob class0[CLASS0_SIZE - 1];
    vpx_prob bits[MV_OFFSET_BITS];
    vpx_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
    vpx_prob fp[MV_FP_SIZE - 1];
    vpx_prob class0_hp;
    vpx_prob hp;
  } nmv_component;
  
  typedef struct {
    vpx_prob joints[MV_JOINTS - 1];
    nmv_component comps[2];
  } nmv_context;
  
  static INLINE MV_JOINT_TYPE vp10_get_mv_joint(const MV *mv) {
    if (mv->row == 0) {
      return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
    } else {
      return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
    }
  }
  
  MV_CLASS_TYPE vp10_get_mv_class(int z, int *offset);
  
  typedef struct {
    unsigned int sign[2];
    unsigned int classes[MV_CLASSES];
    unsigned int class0[CLASS0_SIZE];
    unsigned int bits[MV_OFFSET_BITS][2];
    unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
    unsigned int fp[MV_FP_SIZE];
    unsigned int class0_hp[2];
    unsigned int hp[2];
  } nmv_component_counts;
  
  typedef struct {
    unsigned int joints[MV_JOINTS];
    nmv_component_counts comps[2];
  } nmv_context_counts;
  
  void vp10_inc_mv(const MV *mv, nmv_context_counts *mvctx, const int usehp);
  
  #ifdef __cplusplus
  }  // extern "C"
  #endif
  
  #endif  // VP10_COMMON_ENTROPYMV_H_
  