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_ENTROPYMODE_H_ 13 #define AOM_AV1_COMMON_ENTROPYMODE_H_ 14 15 #include "av1/common/entropy.h" 16 #include "av1/common/entropymv.h" 17 #include "av1/common/filter.h" 18 #include "av1/common/seg_common.h" 19 #include "aom_dsp/aom_filter.h" 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 #define BLOCK_SIZE_GROUPS 4 26 27 #define TX_SIZE_CONTEXTS 3 28 29 #define INTER_OFFSET(mode) ((mode)-NEARESTMV) 30 #define INTER_COMPOUND_OFFSET(mode) (uint8_t)((mode)-NEAREST_NEARESTMV) 31 32 // Number of possible contexts for a color index. 33 // As can be seen from av1_get_palette_color_index_context(), the possible 34 // contexts are (2,0,0), (2,2,1), (3,2,0), (4,1,0), (5,0,0). These are mapped to 35 // a value from 0 to 4 using 'palette_color_index_context_lookup' table. 36 #define PALETTE_COLOR_INDEX_CONTEXTS 5 37 38 // Palette Y mode context for a block is determined by number of neighboring 39 // blocks (top and/or left) using a palette for Y plane. So, possible Y mode' 40 // context values are: 41 // 0 if neither left nor top block uses palette for Y plane, 42 // 1 if exactly one of left or top block uses palette for Y plane, and 43 // 2 if both left and top blocks use palette for Y plane. 44 #define PALETTE_Y_MODE_CONTEXTS 3 45 46 // Palette UV mode context for a block is determined by whether this block uses 47 // palette for the Y plane. So, possible values are: 48 // 0 if this block doesn't use palette for Y plane. 49 // 1 if this block uses palette for Y plane (i.e. Y palette size > 0). 50 #define PALETTE_UV_MODE_CONTEXTS 2 51 52 // Map the number of pixels in a block size to a context 53 // 64(BLOCK_8X8, BLOCK_4x16, BLOCK_16X4) -> 0 54 // 128(BLOCK_8X16, BLOCK_16x8) -> 1 55 // ... 56 // 4096(BLOCK_64X64) -> 6 57 #define PALATTE_BSIZE_CTXS 7 58 59 #define KF_MODE_CONTEXTS 5 60 61 struct AV1Common; 62 63 typedef struct { 64 const int16_t *scan; 65 const int16_t *iscan; 66 const int16_t *neighbors; 67 } SCAN_ORDER; 68 69 typedef struct frame_contexts { 70 aom_cdf_prob txb_skip_cdf[TX_SIZES][TXB_SKIP_CONTEXTS][CDF_SIZE(2)]; 71 aom_cdf_prob eob_extra_cdf[TX_SIZES][PLANE_TYPES][EOB_COEF_CONTEXTS] 72 [CDF_SIZE(2)]; 73 aom_cdf_prob dc_sign_cdf[PLANE_TYPES][DC_SIGN_CONTEXTS][CDF_SIZE(2)]; 74 aom_cdf_prob eob_flag_cdf16[PLANE_TYPES][2][CDF_SIZE(5)]; 75 aom_cdf_prob eob_flag_cdf32[PLANE_TYPES][2][CDF_SIZE(6)]; 76 aom_cdf_prob eob_flag_cdf64[PLANE_TYPES][2][CDF_SIZE(7)]; 77 aom_cdf_prob eob_flag_cdf128[PLANE_TYPES][2][CDF_SIZE(8)]; 78 aom_cdf_prob eob_flag_cdf256[PLANE_TYPES][2][CDF_SIZE(9)]; 79 aom_cdf_prob eob_flag_cdf512[PLANE_TYPES][2][CDF_SIZE(10)]; 80 aom_cdf_prob eob_flag_cdf1024[PLANE_TYPES][2][CDF_SIZE(11)]; 81 aom_cdf_prob coeff_base_eob_cdf[TX_SIZES][PLANE_TYPES][SIG_COEF_CONTEXTS_EOB] 82 [CDF_SIZE(3)]; 83 aom_cdf_prob coeff_base_cdf[TX_SIZES][PLANE_TYPES][SIG_COEF_CONTEXTS] 84 [CDF_SIZE(4)]; 85 aom_cdf_prob coeff_br_cdf[TX_SIZES][PLANE_TYPES][LEVEL_CONTEXTS] 86 [CDF_SIZE(BR_CDF_SIZE)]; 87 88 aom_cdf_prob newmv_cdf[NEWMV_MODE_CONTEXTS][CDF_SIZE(2)]; 89 aom_cdf_prob zeromv_cdf[GLOBALMV_MODE_CONTEXTS][CDF_SIZE(2)]; 90 aom_cdf_prob refmv_cdf[REFMV_MODE_CONTEXTS][CDF_SIZE(2)]; 91 aom_cdf_prob drl_cdf[DRL_MODE_CONTEXTS][CDF_SIZE(2)]; 92 93 aom_cdf_prob inter_compound_mode_cdf[INTER_MODE_CONTEXTS] 94 [CDF_SIZE(INTER_COMPOUND_MODES)]; 95 aom_cdf_prob compound_type_cdf[BLOCK_SIZES_ALL] 96 [CDF_SIZE(MASKED_COMPOUND_TYPES)]; 97 aom_cdf_prob wedge_idx_cdf[BLOCK_SIZES_ALL][CDF_SIZE(16)]; 98 aom_cdf_prob interintra_cdf[BLOCK_SIZE_GROUPS][CDF_SIZE(2)]; 99 aom_cdf_prob wedge_interintra_cdf[BLOCK_SIZES_ALL][CDF_SIZE(2)]; 100 aom_cdf_prob interintra_mode_cdf[BLOCK_SIZE_GROUPS] 101 [CDF_SIZE(INTERINTRA_MODES)]; 102 aom_cdf_prob motion_mode_cdf[BLOCK_SIZES_ALL][CDF_SIZE(MOTION_MODES)]; 103 aom_cdf_prob obmc_cdf[BLOCK_SIZES_ALL][CDF_SIZE(2)]; 104 aom_cdf_prob palette_y_size_cdf[PALATTE_BSIZE_CTXS][CDF_SIZE(PALETTE_SIZES)]; 105 aom_cdf_prob palette_uv_size_cdf[PALATTE_BSIZE_CTXS][CDF_SIZE(PALETTE_SIZES)]; 106 aom_cdf_prob palette_y_color_index_cdf[PALETTE_SIZES] 107 [PALETTE_COLOR_INDEX_CONTEXTS] 108 [CDF_SIZE(PALETTE_COLORS)]; 109 aom_cdf_prob palette_uv_color_index_cdf[PALETTE_SIZES] 110 [PALETTE_COLOR_INDEX_CONTEXTS] 111 [CDF_SIZE(PALETTE_COLORS)]; 112 aom_cdf_prob palette_y_mode_cdf[PALATTE_BSIZE_CTXS][PALETTE_Y_MODE_CONTEXTS] 113 [CDF_SIZE(2)]; 114 aom_cdf_prob palette_uv_mode_cdf[PALETTE_UV_MODE_CONTEXTS][CDF_SIZE(2)]; 115 aom_cdf_prob comp_inter_cdf[COMP_INTER_CONTEXTS][CDF_SIZE(2)]; 116 aom_cdf_prob single_ref_cdf[REF_CONTEXTS][SINGLE_REFS - 1][CDF_SIZE(2)]; 117 aom_cdf_prob comp_ref_type_cdf[COMP_REF_TYPE_CONTEXTS][CDF_SIZE(2)]; 118 aom_cdf_prob uni_comp_ref_cdf[UNI_COMP_REF_CONTEXTS][UNIDIR_COMP_REFS - 1] 119 [CDF_SIZE(2)]; 120 aom_cdf_prob comp_ref_cdf[REF_CONTEXTS][FWD_REFS - 1][CDF_SIZE(2)]; 121 aom_cdf_prob comp_bwdref_cdf[REF_CONTEXTS][BWD_REFS - 1][CDF_SIZE(2)]; 122 aom_cdf_prob txfm_partition_cdf[TXFM_PARTITION_CONTEXTS][CDF_SIZE(2)]; 123 aom_cdf_prob compound_index_cdf[COMP_INDEX_CONTEXTS][CDF_SIZE(2)]; 124 aom_cdf_prob comp_group_idx_cdf[COMP_GROUP_IDX_CONTEXTS][CDF_SIZE(2)]; 125 aom_cdf_prob skip_mode_cdfs[SKIP_CONTEXTS][CDF_SIZE(2)]; 126 aom_cdf_prob skip_cdfs[SKIP_CONTEXTS][CDF_SIZE(2)]; 127 aom_cdf_prob intra_inter_cdf[INTRA_INTER_CONTEXTS][CDF_SIZE(2)]; 128 nmv_context nmvc; 129 nmv_context ndvc; 130 aom_cdf_prob intrabc_cdf[CDF_SIZE(2)]; 131 struct segmentation_probs seg; 132 aom_cdf_prob filter_intra_cdfs[BLOCK_SIZES_ALL][CDF_SIZE(2)]; 133 aom_cdf_prob filter_intra_mode_cdf[CDF_SIZE(FILTER_INTRA_MODES)]; 134 aom_cdf_prob switchable_restore_cdf[CDF_SIZE(RESTORE_SWITCHABLE_TYPES)]; 135 aom_cdf_prob wiener_restore_cdf[CDF_SIZE(2)]; 136 aom_cdf_prob sgrproj_restore_cdf[CDF_SIZE(2)]; 137 aom_cdf_prob y_mode_cdf[BLOCK_SIZE_GROUPS][CDF_SIZE(INTRA_MODES)]; 138 aom_cdf_prob uv_mode_cdf[CFL_ALLOWED_TYPES][INTRA_MODES] 139 [CDF_SIZE(UV_INTRA_MODES)]; 140 aom_cdf_prob partition_cdf[PARTITION_CONTEXTS][CDF_SIZE(EXT_PARTITION_TYPES)]; 141 aom_cdf_prob switchable_interp_cdf[SWITCHABLE_FILTER_CONTEXTS] 142 [CDF_SIZE(SWITCHABLE_FILTERS)]; 143 /* kf_y_cdf is discarded after use, so does not require persistent storage. 144 However, we keep it with the other CDFs in this struct since it needs to 145 be copied to each tile to support parallelism just like the others. 146 */ 147 aom_cdf_prob kf_y_cdf[KF_MODE_CONTEXTS][KF_MODE_CONTEXTS] 148 [CDF_SIZE(INTRA_MODES)]; 149 150 aom_cdf_prob angle_delta_cdf[DIRECTIONAL_MODES] 151 [CDF_SIZE(2 * MAX_ANGLE_DELTA + 1)]; 152 153 aom_cdf_prob tx_size_cdf[MAX_TX_CATS][TX_SIZE_CONTEXTS] 154 [CDF_SIZE(MAX_TX_DEPTH + 1)]; 155 aom_cdf_prob delta_q_cdf[CDF_SIZE(DELTA_Q_PROBS + 1)]; 156 aom_cdf_prob delta_lf_multi_cdf[FRAME_LF_COUNT][CDF_SIZE(DELTA_LF_PROBS + 1)]; 157 aom_cdf_prob delta_lf_cdf[CDF_SIZE(DELTA_LF_PROBS + 1)]; 158 aom_cdf_prob intra_ext_tx_cdf[EXT_TX_SETS_INTRA][EXT_TX_SIZES][INTRA_MODES] 159 [CDF_SIZE(TX_TYPES)]; 160 aom_cdf_prob inter_ext_tx_cdf[EXT_TX_SETS_INTER][EXT_TX_SIZES] 161 [CDF_SIZE(TX_TYPES)]; 162 aom_cdf_prob cfl_sign_cdf[CDF_SIZE(CFL_JOINT_SIGNS)]; 163 aom_cdf_prob cfl_alpha_cdf[CFL_ALPHA_CONTEXTS][CDF_SIZE(CFL_ALPHABET_SIZE)]; 164 int initialized; 165 } FRAME_CONTEXT; 166 167 static const int av1_ext_tx_ind[EXT_TX_SET_TYPES][TX_TYPES] = { 168 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 169 { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 170 { 1, 3, 4, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 171 { 1, 5, 6, 4, 0, 0, 0, 0, 0, 0, 2, 3, 0, 0, 0, 0 }, 172 { 3, 4, 5, 8, 6, 7, 9, 10, 11, 0, 1, 2, 0, 0, 0, 0 }, 173 { 7, 8, 9, 12, 10, 11, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6 }, 174 }; 175 176 static const int av1_ext_tx_inv[EXT_TX_SET_TYPES][TX_TYPES] = { 177 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 178 { 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 179 { 9, 0, 3, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 180 { 9, 0, 10, 11, 3, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 181 { 9, 10, 11, 0, 1, 2, 4, 5, 3, 6, 7, 8, 0, 0, 0, 0 }, 182 { 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 4, 5, 3, 6, 7, 8 }, 183 }; 184 185 void av1_set_default_ref_deltas(int8_t *ref_deltas); 186 void av1_set_default_mode_deltas(int8_t *mode_deltas); 187 void av1_setup_frame_contexts(struct AV1Common *cm); 188 void av1_setup_past_independence(struct AV1Common *cm); 189 190 // Returns (int)ceil(log2(n)). 191 // NOTE: This implementation only works for n <= 2^30. 192 static INLINE int av1_ceil_log2(int n) { 193 if (n < 2) return 0; 194 int i = 1, p = 2; 195 while (p < n) { 196 i++; 197 p = p << 1; 198 } 199 return i; 200 } 201 202 // Returns the context for palette color index at row 'r' and column 'c', 203 // along with the 'color_order' of neighbors and the 'color_idx'. 204 // The 'color_map' is a 2D array with the given 'stride'. 205 int av1_get_palette_color_index_context(const uint8_t *color_map, int stride, 206 int r, int c, int palette_size, 207 uint8_t *color_order, int *color_idx); 208 209 #ifdef __cplusplus 210 } // extern "C" 211 #endif 212 213 #endif // AOM_AV1_COMMON_ENTROPYMODE_H_ 214
