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 81 static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a, 82 ENTROPY_CONTEXT b) { 83 return (a != 0) + (b != 0); 84 } 85 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 } 171 172 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
