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 AOM_AV1_COMMON_ENTROPYMV_H_
13 #define AOM_AV1_COMMON_ENTROPYMV_H_
14
15 #include "config/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 #define MV_UPDATE_PROB 252
30
31 /* Symbols for coding which components are zero jointly */
32 #define MV_JOINTS 4
33 enum {
34 MV_JOINT_ZERO = 0, /* Zero vector */
35 MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
36 MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
37 MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
38 } UENUM1BYTE(MV_JOINT_TYPE);
39
mv_joint_vertical(MV_JOINT_TYPE type)40 static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
41 return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
42 }
43
mv_joint_horizontal(MV_JOINT_TYPE type)44 static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
45 return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
46 }
47
48 /* Symbols for coding magnitude class of nonzero components */
49 #define MV_CLASSES 11
50 enum {
51 MV_CLASS_0 = 0, /* (0, 2] integer pel */
52 MV_CLASS_1 = 1, /* (2, 4] integer pel */
53 MV_CLASS_2 = 2, /* (4, 8] integer pel */
54 MV_CLASS_3 = 3, /* (8, 16] integer pel */
55 MV_CLASS_4 = 4, /* (16, 32] integer pel */
56 MV_CLASS_5 = 5, /* (32, 64] integer pel */
57 MV_CLASS_6 = 6, /* (64, 128] integer pel */
58 MV_CLASS_7 = 7, /* (128, 256] integer pel */
59 MV_CLASS_8 = 8, /* (256, 512] integer pel */
60 MV_CLASS_9 = 9, /* (512, 1024] integer pel */
61 MV_CLASS_10 = 10, /* (1024,2048] integer pel */
62 } UENUM1BYTE(MV_CLASS_TYPE);
63
64 #define CLASS0_BITS 1 /* bits at integer precision for class 0 */
65 #define CLASS0_SIZE (1 << CLASS0_BITS)
66 #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
67 #define MV_BITS_CONTEXTS 6
68 #define MV_FP_SIZE 4
69
70 #define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
71 #define MV_MAX ((1 << MV_MAX_BITS) - 1)
72 #define MV_VALS ((MV_MAX << 1) + 1)
73
74 #define MV_IN_USE_BITS 14
75 #define MV_UPP (1 << MV_IN_USE_BITS)
76 #define MV_LOW (-(1 << MV_IN_USE_BITS))
77
78 typedef struct {
79 aom_cdf_prob classes_cdf[CDF_SIZE(MV_CLASSES)];
80 aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
81 aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
82 aom_cdf_prob sign_cdf[CDF_SIZE(2)];
83 aom_cdf_prob class0_hp_cdf[CDF_SIZE(2)];
84 aom_cdf_prob hp_cdf[CDF_SIZE(2)];
85 aom_cdf_prob class0_cdf[CDF_SIZE(CLASS0_SIZE)];
86 aom_cdf_prob bits_cdf[MV_OFFSET_BITS][CDF_SIZE(2)];
87 } nmv_component;
88
89 typedef struct {
90 aom_cdf_prob joints_cdf[CDF_SIZE(MV_JOINTS)];
91 nmv_component comps[2];
92 } nmv_context;
93
94 enum {
95 MV_SUBPEL_NONE = -1,
96 MV_SUBPEL_LOW_PRECISION = 0,
97 MV_SUBPEL_HIGH_PRECISION,
98 } SENUM1BYTE(MvSubpelPrecision);
99
100 #ifdef __cplusplus
101 } // extern "C"
102 #endif
103
104 #endif // AOM_AV1_COMMON_ENTROPYMV_H_
105