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_ENTROPY_H_
13 #define AOM_AV1_COMMON_ENTROPY_H_
14
15 #include "config/aom_config.h"
16
17 #include "aom/aom_integer.h"
18 #include "aom_dsp/prob.h"
19
20 #include "av1/common/common.h"
21 #include "av1/common/common_data.h"
22 #include "av1/common/enums.h"
23
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27
28 #define TOKEN_CDF_Q_CTXS 4
29
30 #define TXB_SKIP_CONTEXTS 13
31
32 #define EOB_COEF_CONTEXTS 9
33
34 #define SIG_COEF_CONTEXTS_2D 26
35 #define SIG_COEF_CONTEXTS_1D 16
36 #define SIG_COEF_CONTEXTS_EOB 4
37 #define SIG_COEF_CONTEXTS (SIG_COEF_CONTEXTS_2D + SIG_COEF_CONTEXTS_1D)
38
39 #define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS)
40 #define DC_SIGN_CONTEXTS 3
41
42 #define BR_TMP_OFFSET 12
43 #define BR_REF_CAT 4
44 #define LEVEL_CONTEXTS 21
45
46 #define NUM_BASE_LEVELS 2
47
48 #define BR_CDF_SIZE (4)
49 #define COEFF_BASE_RANGE (4 * (BR_CDF_SIZE - 1))
50
51 #define COEFF_CONTEXT_BITS 6
52 #define COEFF_CONTEXT_MASK ((1 << COEFF_CONTEXT_BITS) - 1)
53 #define MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + NUM_BASE_LEVELS + 1)
54
55 #define BASE_CONTEXT_POSITION_NUM 12
56
57 enum {
58 TX_CLASS_2D = 0,
59 TX_CLASS_HORIZ = 1,
60 TX_CLASS_VERT = 2,
61 TX_CLASSES = 3,
62 } UENUM1BYTE(TX_CLASS);
63
64 #define DCT_MAX_VALUE 16384
65 #define DCT_MAX_VALUE_HIGH10 65536
66 #define DCT_MAX_VALUE_HIGH12 262144
67
68 /* Coefficients are predicted via a 3-dimensional probability table indexed on
69 * REF_TYPES, COEF_BANDS and COEF_CONTEXTS. */
70 #define REF_TYPES 2 // intra=0, inter=1
71
72 struct AV1Common;
73 struct frame_contexts;
74 void av1_reset_cdf_symbol_counters(struct frame_contexts *fc);
75 void av1_default_coef_probs(struct AV1Common *cm);
76
77 struct frame_contexts;
78
79 typedef char ENTROPY_CONTEXT;
80
combine_entropy_contexts(ENTROPY_CONTEXT a,ENTROPY_CONTEXT b)81 static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
82 ENTROPY_CONTEXT b) {
83 return (a != 0) + (b != 0);
84 }
85
get_entropy_context(TX_SIZE tx_size,const ENTROPY_CONTEXT * a,const ENTROPY_CONTEXT * l)86 static INLINE int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a,
87 const ENTROPY_CONTEXT *l) {
88 ENTROPY_CONTEXT above_ec = 0, left_ec = 0;
89
90 switch (tx_size) {
91 case TX_4X4:
92 above_ec = a[0] != 0;
93 left_ec = l[0] != 0;
94 break;
95 case TX_4X8:
96 above_ec = a[0] != 0;
97 left_ec = !!*(const uint16_t *)l;
98 break;
99 case TX_8X4:
100 above_ec = !!*(const uint16_t *)a;
101 left_ec = l[0] != 0;
102 break;
103 case TX_8X16:
104 above_ec = !!*(const uint16_t *)a;
105 left_ec = !!*(const uint32_t *)l;
106 break;
107 case TX_16X8:
108 above_ec = !!*(const uint32_t *)a;
109 left_ec = !!*(const uint16_t *)l;
110 break;
111 case TX_16X32:
112 above_ec = !!*(const uint32_t *)a;
113 left_ec = !!*(const uint64_t *)l;
114 break;
115 case TX_32X16:
116 above_ec = !!*(const uint64_t *)a;
117 left_ec = !!*(const uint32_t *)l;
118 break;
119 case TX_8X8:
120 above_ec = !!*(const uint16_t *)a;
121 left_ec = !!*(const uint16_t *)l;
122 break;
123 case TX_16X16:
124 above_ec = !!*(const uint32_t *)a;
125 left_ec = !!*(const uint32_t *)l;
126 break;
127 case TX_32X32:
128 above_ec = !!*(const uint64_t *)a;
129 left_ec = !!*(const uint64_t *)l;
130 break;
131 case TX_64X64:
132 above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
133 left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
134 break;
135 case TX_32X64:
136 above_ec = !!*(const uint64_t *)a;
137 left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
138 break;
139 case TX_64X32:
140 above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
141 left_ec = !!*(const uint64_t *)l;
142 break;
143 case TX_4X16:
144 above_ec = a[0] != 0;
145 left_ec = !!*(const uint32_t *)l;
146 break;
147 case TX_16X4:
148 above_ec = !!*(const uint32_t *)a;
149 left_ec = l[0] != 0;
150 break;
151 case TX_8X32:
152 above_ec = !!*(const uint16_t *)a;
153 left_ec = !!*(const uint64_t *)l;
154 break;
155 case TX_32X8:
156 above_ec = !!*(const uint64_t *)a;
157 left_ec = !!*(const uint16_t *)l;
158 break;
159 case TX_16X64:
160 above_ec = !!*(const uint32_t *)a;
161 left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
162 break;
163 case TX_64X16:
164 above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
165 left_ec = !!*(const uint32_t *)l;
166 break;
167 default: assert(0 && "Invalid transform size."); break;
168 }
169 return combine_entropy_contexts(above_ec, left_ec);
170 }
171
get_txsize_entropy_ctx(TX_SIZE txsize)172 static INLINE TX_SIZE get_txsize_entropy_ctx(TX_SIZE txsize) {
173 return (TX_SIZE)((txsize_sqr_map[txsize] + txsize_sqr_up_map[txsize] + 1) >>
174 1);
175 }
176
177 #ifdef __cplusplus
178 } // extern "C"
179 #endif
180
181 #endif // AOM_AV1_COMMON_ENTROPY_H_
182