1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #ifndef AV1_COMMON_ENTROPYMV_H_
13 #define AV1_COMMON_ENTROPYMV_H_
14
15 #include "./aom_config.h"
16
17 #include "aom_dsp/prob.h"
18
19 #include "av1/common/mv.h"
20
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24
25 struct AV1Common;
26
27 void av1_init_mv_probs(struct AV1Common *cm);
28
29 void av1_adapt_mv_probs(struct AV1Common *cm, int usehp);
30
31 #define MV_UPDATE_PROB 252
32
33 /* Symbols for coding which components are zero jointly */
34 #define MV_JOINTS 4
35 typedef enum {
36 MV_JOINT_ZERO = 0, /* Zero vector */
37 MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
38 MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
39 MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
40 } MV_JOINT_TYPE;
41
mv_joint_vertical(MV_JOINT_TYPE type)42 static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
43 return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
44 }
45
mv_joint_horizontal(MV_JOINT_TYPE type)46 static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
47 return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
48 }
49
50 /* Symbols for coding magnitude class of nonzero components */
51 #define MV_CLASSES 11
52 typedef enum {
53 MV_CLASS_0 = 0, /* (0, 2] integer pel */
54 MV_CLASS_1 = 1, /* (2, 4] integer pel */
55 MV_CLASS_2 = 2, /* (4, 8] integer pel */
56 MV_CLASS_3 = 3, /* (8, 16] integer pel */
57 MV_CLASS_4 = 4, /* (16, 32] integer pel */
58 MV_CLASS_5 = 5, /* (32, 64] integer pel */
59 MV_CLASS_6 = 6, /* (64, 128] integer pel */
60 MV_CLASS_7 = 7, /* (128, 256] integer pel */
61 MV_CLASS_8 = 8, /* (256, 512] integer pel */
62 MV_CLASS_9 = 9, /* (512, 1024] integer pel */
63 MV_CLASS_10 = 10, /* (1024,2048] integer pel */
64 } MV_CLASS_TYPE;
65
66 #define CLASS0_BITS 1 /* bits at integer precision for class 0 */
67 #define CLASS0_SIZE (1 << CLASS0_BITS)
68 #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
69 #if CONFIG_NEW_MULTISYMBOL
70 #define MV_BITS_CONTEXTS 6
71 #endif
72 #define MV_FP_SIZE 4
73
74 #define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
75 #define MV_MAX ((1 << MV_MAX_BITS) - 1)
76 #define MV_VALS ((MV_MAX << 1) + 1)
77
78 #define MV_IN_USE_BITS 14
79 #define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
80 #define MV_LOW (-(1 << MV_IN_USE_BITS))
81
82 extern const aom_tree_index av1_mv_joint_tree[];
83 extern const aom_tree_index av1_mv_class_tree[];
84 extern const aom_tree_index av1_mv_class0_tree[];
85 extern const aom_tree_index av1_mv_fp_tree[];
86
87 typedef struct {
88 aom_prob sign;
89 aom_prob classes[MV_CLASSES - 1];
90 aom_cdf_prob class_cdf[CDF_SIZE(MV_CLASSES)];
91 aom_prob class0[CLASS0_SIZE - 1];
92 aom_prob bits[MV_OFFSET_BITS];
93 aom_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
94 aom_prob fp[MV_FP_SIZE - 1];
95 aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
96 aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
97 aom_prob class0_hp;
98 aom_prob hp;
99 #if CONFIG_NEW_MULTISYMBOL
100 aom_cdf_prob class0_hp_cdf[CDF_SIZE(2)];
101 aom_cdf_prob hp_cdf[CDF_SIZE(2)];
102 aom_cdf_prob class0_cdf[CDF_SIZE(CLASS0_SIZE)];
103 aom_cdf_prob bits_cdf[MV_BITS_CONTEXTS][CDF_SIZE(2)];
104 #endif
105 } nmv_component;
106
107 typedef struct {
108 aom_prob joints[MV_JOINTS - 1];
109 aom_cdf_prob joint_cdf[CDF_SIZE(MV_JOINTS)];
110 nmv_component comps[2];
111 } nmv_context;
112
av1_get_mv_joint(const MV * mv)113 static INLINE MV_JOINT_TYPE av1_get_mv_joint(const MV *mv) {
114 if (mv->row == 0) {
115 return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
116 } else {
117 return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
118 }
119 }
120
121 MV_CLASS_TYPE av1_get_mv_class(int z, int *offset);
122
123 typedef struct {
124 unsigned int sign[2];
125 unsigned int classes[MV_CLASSES];
126 unsigned int class0[CLASS0_SIZE];
127 unsigned int bits[MV_OFFSET_BITS][2];
128 unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
129 unsigned int fp[MV_FP_SIZE];
130 unsigned int class0_hp[2];
131 unsigned int hp[2];
132 } nmv_component_counts;
133
134 typedef struct {
135 unsigned int joints[MV_JOINTS];
136 nmv_component_counts comps[2];
137 } nmv_context_counts;
138
139 typedef enum {
140 #if CONFIG_INTRABC || CONFIG_AMVR
141 MV_SUBPEL_NONE = -1,
142 #endif
143 MV_SUBPEL_LOW_PRECISION = 0,
144 MV_SUBPEL_HIGH_PRECISION,
145 } MvSubpelPrecision;
146
147 void av1_inc_mv(const MV *mv, nmv_context_counts *mvctx,
148 MvSubpelPrecision precision);
149
150 #ifdef __cplusplus
151 } // extern "C"
152 #endif
153
154 #endif // AV1_COMMON_ENTROPYMV_H_
155