1 2 /* 3 * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 4 * 5 * Use of this source code is governed by a BSD-style license 6 * that can be found in the LICENSE file in the root of the source 7 * tree. An additional intellectual property rights grant can be found 8 * in the file PATENTS. All contributing project authors may 9 * be found in the AUTHORS file in the root of the source tree. 10 */ 11 12 #include <limits.h> 13 14 #include "vp9/common/vp9_common.h" 15 #include "vp9/common/vp9_pred_common.h" 16 #include "vp9/common/vp9_seg_common.h" 17 18 static INLINE const MB_MODE_INFO *get_mbmi(const MODE_INFO *const mi) { 19 return (mi != NULL) ? &mi->mbmi : NULL; 20 } 21 22 // Returns a context number for the given MB prediction signal 23 int vp9_get_pred_context_switchable_interp(const MACROBLOCKD *xd) { 24 // Note: 25 // The mode info data structure has a one element border above and to the 26 // left of the entries correpsonding to real macroblocks. 27 // The prediction flags in these dummy entries are initialised to 0. 28 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 29 const int left_type = left_mbmi != NULL && is_inter_block(left_mbmi) ? 30 left_mbmi->interp_filter : SWITCHABLE_FILTERS; 31 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 32 const int above_type = above_mbmi != NULL && is_inter_block(above_mbmi) ? 33 above_mbmi->interp_filter : SWITCHABLE_FILTERS; 34 35 if (left_type == above_type) 36 return left_type; 37 else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS) 38 return above_type; 39 else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS) 40 return left_type; 41 else 42 return SWITCHABLE_FILTERS; 43 } 44 45 // The mode info data structure has a one element border above and to the 46 // left of the entries corresponding to real macroblocks. 47 // The prediction flags in these dummy entries are initialized to 0. 48 // 0 - inter/inter, inter/--, --/inter, --/-- 49 // 1 - intra/inter, inter/intra 50 // 2 - intra/--, --/intra 51 // 3 - intra/intra 52 int vp9_get_intra_inter_context(const MACROBLOCKD *xd) { 53 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 54 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 55 const int has_above = above_mbmi != NULL; 56 const int has_left = left_mbmi != NULL; 57 58 if (has_above && has_left) { // both edges available 59 const int above_intra = !is_inter_block(above_mbmi); 60 const int left_intra = !is_inter_block(left_mbmi); 61 return left_intra && above_intra ? 3 62 : left_intra || above_intra; 63 } else if (has_above || has_left) { // one edge available 64 return 2 * !is_inter_block(has_above ? above_mbmi : left_mbmi); 65 } else { 66 return 0; 67 } 68 } 69 70 int vp9_get_reference_mode_context(const VP9_COMMON *cm, 71 const MACROBLOCKD *xd) { 72 int ctx; 73 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 74 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 75 const int has_above = above_mbmi != NULL; 76 const int has_left = left_mbmi != NULL; 77 // Note: 78 // The mode info data structure has a one element border above and to the 79 // left of the entries correpsonding to real macroblocks. 80 // The prediction flags in these dummy entries are initialised to 0. 81 if (has_above && has_left) { // both edges available 82 if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi)) 83 // neither edge uses comp pred (0/1) 84 ctx = (above_mbmi->ref_frame[0] == cm->comp_fixed_ref) ^ 85 (left_mbmi->ref_frame[0] == cm->comp_fixed_ref); 86 else if (!has_second_ref(above_mbmi)) 87 // one of two edges uses comp pred (2/3) 88 ctx = 2 + (above_mbmi->ref_frame[0] == cm->comp_fixed_ref || 89 !is_inter_block(above_mbmi)); 90 else if (!has_second_ref(left_mbmi)) 91 // one of two edges uses comp pred (2/3) 92 ctx = 2 + (left_mbmi->ref_frame[0] == cm->comp_fixed_ref || 93 !is_inter_block(left_mbmi)); 94 else // both edges use comp pred (4) 95 ctx = 4; 96 } else if (has_above || has_left) { // one edge available 97 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi; 98 99 if (!has_second_ref(edge_mbmi)) 100 // edge does not use comp pred (0/1) 101 ctx = edge_mbmi->ref_frame[0] == cm->comp_fixed_ref; 102 else 103 // edge uses comp pred (3) 104 ctx = 3; 105 } else { // no edges available (1) 106 ctx = 1; 107 } 108 assert(ctx >= 0 && ctx < COMP_INTER_CONTEXTS); 109 return ctx; 110 } 111 112 // Returns a context number for the given MB prediction signal 113 int vp9_get_pred_context_comp_ref_p(const VP9_COMMON *cm, 114 const MACROBLOCKD *xd) { 115 int pred_context; 116 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 117 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 118 const int above_in_image = above_mbmi != NULL; 119 const int left_in_image = left_mbmi != NULL; 120 121 // Note: 122 // The mode info data structure has a one element border above and to the 123 // left of the entries correpsonding to real macroblocks. 124 // The prediction flags in these dummy entries are initialised to 0. 125 const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref]; 126 const int var_ref_idx = !fix_ref_idx; 127 128 if (above_in_image && left_in_image) { // both edges available 129 const int above_intra = !is_inter_block(above_mbmi); 130 const int left_intra = !is_inter_block(left_mbmi); 131 132 if (above_intra && left_intra) { // intra/intra (2) 133 pred_context = 2; 134 } else if (above_intra || left_intra) { // intra/inter 135 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; 136 137 if (!has_second_ref(edge_mbmi)) // single pred (1/3) 138 pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]); 139 else // comp pred (1/3) 140 pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx] 141 != cm->comp_var_ref[1]); 142 } else { // inter/inter 143 const int l_sg = !has_second_ref(left_mbmi); 144 const int a_sg = !has_second_ref(above_mbmi); 145 const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0] 146 : above_mbmi->ref_frame[var_ref_idx]; 147 const MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0] 148 : left_mbmi->ref_frame[var_ref_idx]; 149 150 if (vrfa == vrfl && cm->comp_var_ref[1] == vrfa) { 151 pred_context = 0; 152 } else if (l_sg && a_sg) { // single/single 153 if ((vrfa == cm->comp_fixed_ref && vrfl == cm->comp_var_ref[0]) || 154 (vrfl == cm->comp_fixed_ref && vrfa == cm->comp_var_ref[0])) 155 pred_context = 4; 156 else if (vrfa == vrfl) 157 pred_context = 3; 158 else 159 pred_context = 1; 160 } else if (l_sg || a_sg) { // single/comp 161 const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl; 162 const MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl; 163 if (vrfc == cm->comp_var_ref[1] && rfs != cm->comp_var_ref[1]) 164 pred_context = 1; 165 else if (rfs == cm->comp_var_ref[1] && vrfc != cm->comp_var_ref[1]) 166 pred_context = 2; 167 else 168 pred_context = 4; 169 } else if (vrfa == vrfl) { // comp/comp 170 pred_context = 4; 171 } else { 172 pred_context = 2; 173 } 174 } 175 } else if (above_in_image || left_in_image) { // one edge available 176 const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi; 177 178 if (!is_inter_block(edge_mbmi)) { 179 pred_context = 2; 180 } else { 181 if (has_second_ref(edge_mbmi)) 182 pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx] 183 != cm->comp_var_ref[1]); 184 else 185 pred_context = 3 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]); 186 } 187 } else { // no edges available (2) 188 pred_context = 2; 189 } 190 assert(pred_context >= 0 && pred_context < REF_CONTEXTS); 191 192 return pred_context; 193 } 194 195 int vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) { 196 int pred_context; 197 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 198 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 199 const int has_above = above_mbmi != NULL; 200 const int has_left = left_mbmi != NULL; 201 // Note: 202 // The mode info data structure has a one element border above and to the 203 // left of the entries correpsonding to real macroblocks. 204 // The prediction flags in these dummy entries are initialised to 0. 205 if (has_above && has_left) { // both edges available 206 const int above_intra = !is_inter_block(above_mbmi); 207 const int left_intra = !is_inter_block(left_mbmi); 208 209 if (above_intra && left_intra) { // intra/intra 210 pred_context = 2; 211 } else if (above_intra || left_intra) { // intra/inter or inter/intra 212 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; 213 if (!has_second_ref(edge_mbmi)) 214 pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME); 215 else 216 pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME || 217 edge_mbmi->ref_frame[1] == LAST_FRAME); 218 } else { // inter/inter 219 const int above_has_second = has_second_ref(above_mbmi); 220 const int left_has_second = has_second_ref(left_mbmi); 221 const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0]; 222 const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1]; 223 const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0]; 224 const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1]; 225 226 if (above_has_second && left_has_second) { 227 pred_context = 1 + (above0 == LAST_FRAME || above1 == LAST_FRAME || 228 left0 == LAST_FRAME || left1 == LAST_FRAME); 229 } else if (above_has_second || left_has_second) { 230 const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0; 231 const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0; 232 const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1; 233 234 if (rfs == LAST_FRAME) 235 pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME); 236 else 237 pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME); 238 } else { 239 pred_context = 2 * (above0 == LAST_FRAME) + 2 * (left0 == LAST_FRAME); 240 } 241 } 242 } else if (has_above || has_left) { // one edge available 243 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi; 244 if (!is_inter_block(edge_mbmi)) { // intra 245 pred_context = 2; 246 } else { // inter 247 if (!has_second_ref(edge_mbmi)) 248 pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME); 249 else 250 pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME || 251 edge_mbmi->ref_frame[1] == LAST_FRAME); 252 } 253 } else { // no edges available 254 pred_context = 2; 255 } 256 257 assert(pred_context >= 0 && pred_context < REF_CONTEXTS); 258 return pred_context; 259 } 260 261 int vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) { 262 int pred_context; 263 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 264 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 265 const int has_above = above_mbmi != NULL; 266 const int has_left = left_mbmi != NULL; 267 268 // Note: 269 // The mode info data structure has a one element border above and to the 270 // left of the entries correpsonding to real macroblocks. 271 // The prediction flags in these dummy entries are initialised to 0. 272 if (has_above && has_left) { // both edges available 273 const int above_intra = !is_inter_block(above_mbmi); 274 const int left_intra = !is_inter_block(left_mbmi); 275 276 if (above_intra && left_intra) { // intra/intra 277 pred_context = 2; 278 } else if (above_intra || left_intra) { // intra/inter or inter/intra 279 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; 280 if (!has_second_ref(edge_mbmi)) { 281 if (edge_mbmi->ref_frame[0] == LAST_FRAME) 282 pred_context = 3; 283 else 284 pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME); 285 } else { 286 pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME || 287 edge_mbmi->ref_frame[1] == GOLDEN_FRAME); 288 } 289 } else { // inter/inter 290 const int above_has_second = has_second_ref(above_mbmi); 291 const int left_has_second = has_second_ref(left_mbmi); 292 const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0]; 293 const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1]; 294 const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0]; 295 const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1]; 296 297 if (above_has_second && left_has_second) { 298 if (above0 == left0 && above1 == left1) 299 pred_context = 3 * (above0 == GOLDEN_FRAME || 300 above1 == GOLDEN_FRAME || 301 left0 == GOLDEN_FRAME || 302 left1 == GOLDEN_FRAME); 303 else 304 pred_context = 2; 305 } else if (above_has_second || left_has_second) { 306 const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0; 307 const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0; 308 const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1; 309 310 if (rfs == GOLDEN_FRAME) 311 pred_context = 3 + (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME); 312 else if (rfs == ALTREF_FRAME) 313 pred_context = crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME; 314 else 315 pred_context = 1 + 2 * (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME); 316 } else { 317 if (above0 == LAST_FRAME && left0 == LAST_FRAME) { 318 pred_context = 3; 319 } else if (above0 == LAST_FRAME || left0 == LAST_FRAME) { 320 const MV_REFERENCE_FRAME edge0 = (above0 == LAST_FRAME) ? left0 321 : above0; 322 pred_context = 4 * (edge0 == GOLDEN_FRAME); 323 } else { 324 pred_context = 2 * (above0 == GOLDEN_FRAME) + 325 2 * (left0 == GOLDEN_FRAME); 326 } 327 } 328 } 329 } else if (has_above || has_left) { // one edge available 330 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi; 331 332 if (!is_inter_block(edge_mbmi) || 333 (edge_mbmi->ref_frame[0] == LAST_FRAME && !has_second_ref(edge_mbmi))) 334 pred_context = 2; 335 else if (!has_second_ref(edge_mbmi)) 336 pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME); 337 else 338 pred_context = 3 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME || 339 edge_mbmi->ref_frame[1] == GOLDEN_FRAME); 340 } else { // no edges available (2) 341 pred_context = 2; 342 } 343 assert(pred_context >= 0 && pred_context < REF_CONTEXTS); 344 return pred_context; 345 } 346 // Returns a context number for the given MB prediction signal 347 // The mode info data structure has a one element border above and to the 348 // left of the entries corresponding to real blocks. 349 // The prediction flags in these dummy entries are initialized to 0. 350 int vp9_get_tx_size_context(const MACROBLOCKD *xd) { 351 const int max_tx_size = max_txsize_lookup[xd->mi[0].src_mi->mbmi.sb_type]; 352 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd)); 353 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd)); 354 const int has_above = above_mbmi != NULL; 355 const int has_left = left_mbmi != NULL; 356 int above_ctx = (has_above && !above_mbmi->skip) ? (int)above_mbmi->tx_size 357 : max_tx_size; 358 int left_ctx = (has_left && !left_mbmi->skip) ? (int)left_mbmi->tx_size 359 : max_tx_size; 360 if (!has_left) 361 left_ctx = above_ctx; 362 363 if (!has_above) 364 above_ctx = left_ctx; 365 366 return (above_ctx + left_ctx) > max_tx_size; 367 } 368 369 int vp9_get_segment_id(const VP9_COMMON *cm, const uint8_t *segment_ids, 370 BLOCK_SIZE bsize, int mi_row, int mi_col) { 371 const int mi_offset = mi_row * cm->mi_cols + mi_col; 372 const int bw = num_8x8_blocks_wide_lookup[bsize]; 373 const int bh = num_8x8_blocks_high_lookup[bsize]; 374 const int xmis = MIN(cm->mi_cols - mi_col, bw); 375 const int ymis = MIN(cm->mi_rows - mi_row, bh); 376 int x, y, segment_id = INT_MAX; 377 378 for (y = 0; y < ymis; y++) 379 for (x = 0; x < xmis; x++) 380 segment_id = MIN(segment_id, 381 segment_ids[mi_offset + y * cm->mi_cols + x]); 382 383 assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); 384 return segment_id; 385 } 386
