1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent.
*/
#ifndef AOM_AV1_COMMON_ENTROPY_H_
#define AOM_AV1_COMMON_ENTROPY_H_
#include "config/aom_config.h"
#include "aom/aom_integer.h"
#include "aom_dsp/prob.h"
#include "av1/common/common.h"
#include "av1/common/common_data.h"
#include "av1/common/enums.h"
#ifdef __cplusplus
extern "C" {
#endif
#define TOKEN_CDF_Q_CTXS 4
#define TXB_SKIP_CONTEXTS 13
#define EOB_COEF_CONTEXTS 9
#define SIG_COEF_CONTEXTS_2D 26
#define SIG_COEF_CONTEXTS_1D 16
#define SIG_COEF_CONTEXTS_EOB 4
#define SIG_COEF_CONTEXTS (SIG_COEF_CONTEXTS_2D + SIG_COEF_CONTEXTS_1D)
#define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS)
#define DC_SIGN_CONTEXTS 3
#define BR_TMP_OFFSET 12
#define BR_REF_CAT 4
#define LEVEL_CONTEXTS 21
#define NUM_BASE_LEVELS 2
#define BR_CDF_SIZE (4)
#define COEFF_BASE_RANGE (4 * (BR_CDF_SIZE - 1))
#define COEFF_CONTEXT_BITS 6
#define COEFF_CONTEXT_MASK ((1 << COEFF_CONTEXT_BITS) - 1)
#define MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + NUM_BASE_LEVELS + 1)
#define BASE_CONTEXT_POSITION_NUM 12
typedef enum TX_CLASS {
TX_CLASS_2D = 0,
TX_CLASS_HORIZ = 1,
TX_CLASS_VERT = 2,
TX_CLASSES = 3,
} TX_CLASS;
#define DCT_MAX_VALUE 16384
#define DCT_MAX_VALUE_HIGH10 65536
#define DCT_MAX_VALUE_HIGH12 262144
/* Coefficients are predicted via a 3-dimensional probability table indexed on
* REF_TYPES, COEF_BANDS and COEF_CONTEXTS. */
#define REF_TYPES 2 // intra=0, inter=1
struct AV1Common;
struct frame_contexts;
void av1_reset_cdf_symbol_counters(struct frame_contexts *fc);
void av1_default_coef_probs(struct AV1Common *cm);
struct frame_contexts;
typedef char ENTROPY_CONTEXT;
static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
ENTROPY_CONTEXT b) {
return (a != 0) + (b != 0);
}
static INLINE int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a,
const ENTROPY_CONTEXT *l) {
ENTROPY_CONTEXT above_ec = 0, left_ec = 0;
switch (tx_size) {
case TX_4X4:
above_ec = a[0] != 0;
left_ec = l[0] != 0;
break;
case TX_4X8:
above_ec = a[0] != 0;
left_ec = !!*(const uint16_t *)l;
break;
case TX_8X4:
above_ec = !!*(const uint16_t *)a;
left_ec = l[0] != 0;
break;
case TX_8X16:
above_ec = !!*(const uint16_t *)a;
left_ec = !!*(const uint32_t *)l;
break;
case TX_16X8:
above_ec = !!*(const uint32_t *)a;
left_ec = !!*(const uint16_t *)l;
break;
case TX_16X32:
above_ec = !!*(const uint32_t *)a;
left_ec = !!*(const uint64_t *)l;
break;
case TX_32X16:
above_ec = !!*(const uint64_t *)a;
left_ec = !!*(const uint32_t *)l;
break;
case TX_8X8:
above_ec = !!*(const uint16_t *)a;
left_ec = !!*(const uint16_t *)l;
break;
case TX_16X16:
above_ec = !!*(const uint32_t *)a;
left_ec = !!*(const uint32_t *)l;
break;
case TX_32X32:
above_ec = !!*(const uint64_t *)a;
left_ec = !!*(const uint64_t *)l;
break;
case TX_64X64:
above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
break;
case TX_32X64:
above_ec = !!*(const uint64_t *)a;
left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
break;
case TX_64X32:
above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
left_ec = !!*(const uint64_t *)l;
break;
case TX_4X16:
above_ec = a[0] != 0;
left_ec = !!*(const uint32_t *)l;
break;
case TX_16X4:
above_ec = !!*(const uint32_t *)a;
left_ec = l[0] != 0;
break;
case TX_8X32:
above_ec = !!*(const uint16_t *)a;
left_ec = !!*(const uint64_t *)l;
break;
case TX_32X8:
above_ec = !!*(const uint64_t *)a;
left_ec = !!*(const uint16_t *)l;
break;
case TX_16X64:
above_ec = !!*(const uint32_t *)a;
left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
break;
case TX_64X16:
above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
left_ec = !!*(const uint32_t *)l;
break;
default: assert(0 && "Invalid transform size."); break;
}
return combine_entropy_contexts(above_ec, left_ec);
}
static INLINE TX_SIZE get_txsize_entropy_ctx(TX_SIZE txsize) {
return (TX_SIZE)((txsize_sqr_map[txsize] + txsize_sqr_up_map[txsize] + 1) >>
1);
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_ENTROPY_H_
|
