1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12#ifndef VP9_COMMON_VP9_ENTROPYMV_H_
13#define VP9_COMMON_VP9_ENTROPYMV_H_
14
15#include "./vpx_config.h"
16
17#include "vpx_dsp/prob.h"
18
19#include "vp9/common/vp9_mv.h"
20
21#ifdef __cplusplus
22extern "C" {
23#endif
24
25struct VP9Common;
26
27void vp9_init_mv_probs(struct VP9Common *cm);
28
29void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
30int vp9_use_mv_hp(const MV *ref);
31
32#define MV_UPDATE_PROB 252
33
34/* Symbols for coding which components are zero jointly */
35#define MV_JOINTS     4
36typedef enum {
37  MV_JOINT_ZERO = 0,             /* Zero vector */
38  MV_JOINT_HNZVZ = 1,            /* Vert zero, hor nonzero */
39  MV_JOINT_HZVNZ = 2,            /* Hor zero, vert nonzero */
40  MV_JOINT_HNZVNZ = 3,           /* Both components nonzero */
41} MV_JOINT_TYPE;
42
43static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
44  return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
45}
46
47static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
48  return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
49}
50
51/* Symbols for coding magnitude class of nonzero components */
52#define MV_CLASSES     11
53typedef enum {
54  MV_CLASS_0 = 0,      /* (0, 2]     integer pel */
55  MV_CLASS_1 = 1,      /* (2, 4]     integer pel */
56  MV_CLASS_2 = 2,      /* (4, 8]     integer pel */
57  MV_CLASS_3 = 3,      /* (8, 16]    integer pel */
58  MV_CLASS_4 = 4,      /* (16, 32]   integer pel */
59  MV_CLASS_5 = 5,      /* (32, 64]   integer pel */
60  MV_CLASS_6 = 6,      /* (64, 128]  integer pel */
61  MV_CLASS_7 = 7,      /* (128, 256] integer pel */
62  MV_CLASS_8 = 8,      /* (256, 512] integer pel */
63  MV_CLASS_9 = 9,      /* (512, 1024] integer pel */
64  MV_CLASS_10 = 10,    /* (1024,2048] integer pel */
65} MV_CLASS_TYPE;
66
67#define CLASS0_BITS    1  /* bits at integer precision for class 0 */
68#define CLASS0_SIZE    (1 << CLASS0_BITS)
69#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
70#define MV_FP_SIZE 4
71
72#define MV_MAX_BITS    (MV_CLASSES + CLASS0_BITS + 2)
73#define MV_MAX         ((1 << MV_MAX_BITS) - 1)
74#define MV_VALS        ((MV_MAX << 1) + 1)
75
76#define MV_IN_USE_BITS 14
77#define MV_UPP   ((1 << MV_IN_USE_BITS) - 1)
78#define MV_LOW   (-(1 << MV_IN_USE_BITS))
79
80extern const vpx_tree_index vp9_mv_joint_tree[];
81extern const vpx_tree_index vp9_mv_class_tree[];
82extern const vpx_tree_index vp9_mv_class0_tree[];
83extern const vpx_tree_index vp9_mv_fp_tree[];
84
85typedef struct {
86  vpx_prob sign;
87  vpx_prob classes[MV_CLASSES - 1];
88  vpx_prob class0[CLASS0_SIZE - 1];
89  vpx_prob bits[MV_OFFSET_BITS];
90  vpx_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
91  vpx_prob fp[MV_FP_SIZE - 1];
92  vpx_prob class0_hp;
93  vpx_prob hp;
94} nmv_component;
95
96typedef struct {
97  vpx_prob joints[MV_JOINTS - 1];
98  nmv_component comps[2];
99} nmv_context;
100
101static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {
102  if (mv->row == 0) {
103    return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
104  } else {
105    return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
106  }
107}
108
109MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);
110
111typedef struct {
112  unsigned int sign[2];
113  unsigned int classes[MV_CLASSES];
114  unsigned int class0[CLASS0_SIZE];
115  unsigned int bits[MV_OFFSET_BITS][2];
116  unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
117  unsigned int fp[MV_FP_SIZE];
118  unsigned int class0_hp[2];
119  unsigned int hp[2];
120} nmv_component_counts;
121
122typedef struct {
123  unsigned int joints[MV_JOINTS];
124  nmv_component_counts comps[2];
125} nmv_context_counts;
126
127void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
128
129#ifdef __cplusplus
130}  // extern "C"
131#endif
132
133#endif  // VP9_COMMON_VP9_ENTROPYMV_H_
134