decodemv.c (60820B)
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 #include <assert.h> 13 14 #include "av1/common/cfl.h" 15 #include "av1/common/common.h" 16 #include "av1/common/entropy.h" 17 #include "av1/common/entropymode.h" 18 #include "av1/common/entropymv.h" 19 #include "av1/common/mvref_common.h" 20 #include "av1/common/pred_common.h" 21 #include "av1/common/reconinter.h" 22 #include "av1/common/reconintra.h" 23 #include "av1/common/seg_common.h" 24 #include "av1/common/warped_motion.h" 25 26 #include "av1/decoder/decodeframe.h" 27 #include "av1/decoder/decodemv.h" 28 29 #include "aom_dsp/aom_dsp_common.h" 30 #include "aom_ports/bitops.h" 31 32 #define ACCT_STR __func__ 33 34 #define DEC_MISMATCH_DEBUG 0 35 36 static PREDICTION_MODE read_intra_mode(aom_reader *r, aom_cdf_prob *cdf) { 37 return (PREDICTION_MODE)aom_read_symbol(r, cdf, INTRA_MODES, ACCT_STR); 38 } 39 40 static void read_cdef(AV1_COMMON *cm, aom_reader *r, MACROBLOCKD *const xd) { 41 const int skip_txfm = xd->mi[0]->skip_txfm; 42 if (cm->features.coded_lossless) return; 43 if (cm->features.allow_intrabc) { 44 assert(cm->cdef_info.cdef_bits == 0); 45 return; 46 } 47 48 // At the start of a superblock, mark that we haven't yet read CDEF strengths 49 // for any of the CDEF units contained in this superblock. 50 const int sb_mask = (cm->seq_params->mib_size - 1); 51 const int mi_row_in_sb = (xd->mi_row & sb_mask); 52 const int mi_col_in_sb = (xd->mi_col & sb_mask); 53 if (mi_row_in_sb == 0 && mi_col_in_sb == 0) { 54 xd->cdef_transmitted[0] = xd->cdef_transmitted[1] = 55 xd->cdef_transmitted[2] = xd->cdef_transmitted[3] = false; 56 } 57 58 // CDEF unit size is 64x64 irrespective of the superblock size. 59 const int cdef_size = 1 << (6 - MI_SIZE_LOG2); 60 61 // Find index of this CDEF unit in this superblock. 62 const int index_mask = cdef_size; 63 const int cdef_unit_row_in_sb = ((xd->mi_row & index_mask) != 0); 64 const int cdef_unit_col_in_sb = ((xd->mi_col & index_mask) != 0); 65 const int index = (cm->seq_params->sb_size == BLOCK_128X128) 66 ? cdef_unit_col_in_sb + 2 * cdef_unit_row_in_sb 67 : 0; 68 69 // Read CDEF strength from the first non-skip coding block in this CDEF unit. 70 if (!xd->cdef_transmitted[index] && !skip_txfm) { 71 // CDEF strength for this CDEF unit needs to be read into the MB_MODE_INFO 72 // of the 1st block in this CDEF unit. 73 const int first_block_mask = ~(cdef_size - 1); 74 CommonModeInfoParams *const mi_params = &cm->mi_params; 75 const int grid_idx = 76 get_mi_grid_idx(mi_params, xd->mi_row & first_block_mask, 77 xd->mi_col & first_block_mask); 78 MB_MODE_INFO *const mbmi = mi_params->mi_grid_base[grid_idx]; 79 mbmi->cdef_strength = 80 aom_read_literal(r, cm->cdef_info.cdef_bits, ACCT_STR); 81 xd->cdef_transmitted[index] = true; 82 } 83 } 84 85 static int read_delta_qindex(AV1_COMMON *cm, const MACROBLOCKD *xd, 86 aom_reader *r, MB_MODE_INFO *const mbmi) { 87 int sign, abs, reduced_delta_qindex = 0; 88 BLOCK_SIZE bsize = mbmi->bsize; 89 const int b_col = xd->mi_col & (cm->seq_params->mib_size - 1); 90 const int b_row = xd->mi_row & (cm->seq_params->mib_size - 1); 91 const int read_delta_q_flag = (b_col == 0 && b_row == 0); 92 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 93 94 if ((bsize != cm->seq_params->sb_size || mbmi->skip_txfm == 0) && 95 read_delta_q_flag) { 96 abs = aom_read_symbol(r, ec_ctx->delta_q_cdf, DELTA_Q_PROBS + 1, ACCT_STR); 97 const int smallval = (abs < DELTA_Q_SMALL); 98 99 if (!smallval) { 100 const int rem_bits = aom_read_literal(r, 3, ACCT_STR) + 1; 101 const int thr = (1 << rem_bits) + 1; 102 abs = aom_read_literal(r, rem_bits, ACCT_STR) + thr; 103 } 104 105 if (abs) { 106 sign = aom_read_bit(r, ACCT_STR); 107 } else { 108 sign = 1; 109 } 110 111 reduced_delta_qindex = sign ? -abs : abs; 112 } 113 return reduced_delta_qindex; 114 } 115 static int read_delta_lflevel(const AV1_COMMON *const cm, aom_reader *r, 116 aom_cdf_prob *const cdf, 117 const MB_MODE_INFO *const mbmi, int mi_col, 118 int mi_row) { 119 int reduced_delta_lflevel = 0; 120 const BLOCK_SIZE bsize = mbmi->bsize; 121 const int b_col = mi_col & (cm->seq_params->mib_size - 1); 122 const int b_row = mi_row & (cm->seq_params->mib_size - 1); 123 const int read_delta_lf_flag = (b_col == 0 && b_row == 0); 124 125 if ((bsize != cm->seq_params->sb_size || mbmi->skip_txfm == 0) && 126 read_delta_lf_flag) { 127 int abs = aom_read_symbol(r, cdf, DELTA_LF_PROBS + 1, ACCT_STR); 128 const int smallval = (abs < DELTA_LF_SMALL); 129 if (!smallval) { 130 const int rem_bits = aom_read_literal(r, 3, ACCT_STR) + 1; 131 const int thr = (1 << rem_bits) + 1; 132 abs = aom_read_literal(r, rem_bits, ACCT_STR) + thr; 133 } 134 const int sign = abs ? aom_read_bit(r, ACCT_STR) : 1; 135 reduced_delta_lflevel = sign ? -abs : abs; 136 } 137 return reduced_delta_lflevel; 138 } 139 140 static UV_PREDICTION_MODE read_intra_mode_uv(FRAME_CONTEXT *ec_ctx, 141 aom_reader *r, 142 CFL_ALLOWED_TYPE cfl_allowed, 143 PREDICTION_MODE y_mode) { 144 const UV_PREDICTION_MODE uv_mode = 145 aom_read_symbol(r, ec_ctx->uv_mode_cdf[cfl_allowed][y_mode], 146 UV_INTRA_MODES - !cfl_allowed, ACCT_STR); 147 return uv_mode; 148 } 149 150 static uint8_t read_cfl_alphas(FRAME_CONTEXT *const ec_ctx, aom_reader *r, 151 int8_t *signs_out) { 152 const int8_t joint_sign = 153 aom_read_symbol(r, ec_ctx->cfl_sign_cdf, CFL_JOINT_SIGNS, "cfl:signs"); 154 uint8_t idx = 0; 155 // Magnitudes are only coded for nonzero values 156 if (CFL_SIGN_U(joint_sign) != CFL_SIGN_ZERO) { 157 aom_cdf_prob *cdf_u = ec_ctx->cfl_alpha_cdf[CFL_CONTEXT_U(joint_sign)]; 158 idx = (uint8_t)aom_read_symbol(r, cdf_u, CFL_ALPHABET_SIZE, "cfl:alpha_u") 159 << CFL_ALPHABET_SIZE_LOG2; 160 } 161 if (CFL_SIGN_V(joint_sign) != CFL_SIGN_ZERO) { 162 aom_cdf_prob *cdf_v = ec_ctx->cfl_alpha_cdf[CFL_CONTEXT_V(joint_sign)]; 163 idx += (uint8_t)aom_read_symbol(r, cdf_v, CFL_ALPHABET_SIZE, "cfl:alpha_v"); 164 } 165 *signs_out = joint_sign; 166 return idx; 167 } 168 169 static INTERINTRA_MODE read_interintra_mode(MACROBLOCKD *xd, aom_reader *r, 170 int size_group) { 171 const INTERINTRA_MODE ii_mode = (INTERINTRA_MODE)aom_read_symbol( 172 r, xd->tile_ctx->interintra_mode_cdf[size_group], INTERINTRA_MODES, 173 ACCT_STR); 174 return ii_mode; 175 } 176 177 static PREDICTION_MODE read_inter_mode(FRAME_CONTEXT *ec_ctx, aom_reader *r, 178 int16_t ctx) { 179 int16_t mode_ctx = ctx & NEWMV_CTX_MASK; 180 int is_newmv, is_zeromv, is_refmv; 181 is_newmv = aom_read_symbol(r, ec_ctx->newmv_cdf[mode_ctx], 2, ACCT_STR) == 0; 182 if (is_newmv) return NEWMV; 183 184 mode_ctx = (ctx >> GLOBALMV_OFFSET) & GLOBALMV_CTX_MASK; 185 is_zeromv = 186 aom_read_symbol(r, ec_ctx->zeromv_cdf[mode_ctx], 2, ACCT_STR) == 0; 187 if (is_zeromv) return GLOBALMV; 188 189 mode_ctx = (ctx >> REFMV_OFFSET) & REFMV_CTX_MASK; 190 is_refmv = aom_read_symbol(r, ec_ctx->refmv_cdf[mode_ctx], 2, ACCT_STR) == 0; 191 if (is_refmv) 192 return NEARESTMV; 193 else 194 return NEARMV; 195 } 196 197 static void read_drl_idx(FRAME_CONTEXT *ec_ctx, DecoderCodingBlock *dcb, 198 MB_MODE_INFO *mbmi, aom_reader *r) { 199 MACROBLOCKD *const xd = &dcb->xd; 200 uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame); 201 mbmi->ref_mv_idx = 0; 202 if (mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV) { 203 for (int idx = 0; idx < 2; ++idx) { 204 if (dcb->ref_mv_count[ref_frame_type] > idx + 1) { 205 uint8_t drl_ctx = av1_drl_ctx(xd->weight[ref_frame_type], idx); 206 int drl_idx = aom_read_symbol(r, ec_ctx->drl_cdf[drl_ctx], 2, ACCT_STR); 207 mbmi->ref_mv_idx = idx + drl_idx; 208 if (!drl_idx) return; 209 } 210 } 211 } 212 if (have_nearmv_in_inter_mode(mbmi->mode)) { 213 // Offset the NEARESTMV mode. 214 // TODO(jingning): Unify the two syntax decoding loops after the NEARESTMV 215 // mode is factored in. 216 for (int idx = 1; idx < 3; ++idx) { 217 if (dcb->ref_mv_count[ref_frame_type] > idx + 1) { 218 uint8_t drl_ctx = av1_drl_ctx(xd->weight[ref_frame_type], idx); 219 int drl_idx = aom_read_symbol(r, ec_ctx->drl_cdf[drl_ctx], 2, ACCT_STR); 220 mbmi->ref_mv_idx = idx + drl_idx - 1; 221 if (!drl_idx) return; 222 } 223 } 224 } 225 } 226 227 static MOTION_MODE read_motion_mode(AV1_COMMON *cm, MACROBLOCKD *xd, 228 MB_MODE_INFO *mbmi, aom_reader *r) { 229 if (cm->features.switchable_motion_mode == 0) return SIMPLE_TRANSLATION; 230 if (mbmi->skip_mode) return SIMPLE_TRANSLATION; 231 232 const MOTION_MODE last_motion_mode_allowed = motion_mode_allowed( 233 xd->global_motion, xd, mbmi, cm->features.allow_warped_motion); 234 int motion_mode; 235 236 if (last_motion_mode_allowed == SIMPLE_TRANSLATION) return SIMPLE_TRANSLATION; 237 238 if (last_motion_mode_allowed == OBMC_CAUSAL) { 239 motion_mode = 240 aom_read_symbol(r, xd->tile_ctx->obmc_cdf[mbmi->bsize], 2, ACCT_STR); 241 return (MOTION_MODE)(SIMPLE_TRANSLATION + motion_mode); 242 } else { 243 motion_mode = aom_read_symbol(r, xd->tile_ctx->motion_mode_cdf[mbmi->bsize], 244 MOTION_MODES, ACCT_STR); 245 return (MOTION_MODE)(SIMPLE_TRANSLATION + motion_mode); 246 } 247 } 248 249 static PREDICTION_MODE read_inter_compound_mode(MACROBLOCKD *xd, aom_reader *r, 250 int16_t ctx) { 251 const int mode = 252 aom_read_symbol(r, xd->tile_ctx->inter_compound_mode_cdf[ctx], 253 INTER_COMPOUND_MODES, ACCT_STR); 254 assert(is_inter_compound_mode(NEAREST_NEARESTMV + mode)); 255 return NEAREST_NEARESTMV + mode; 256 } 257 258 int av1_neg_deinterleave(int diff, int ref, int max) { 259 if (!ref) return diff; 260 if (ref >= (max - 1)) return max - diff - 1; 261 if (2 * ref < max) { 262 if (diff <= 2 * ref) { 263 if (diff & 1) 264 return ref + ((diff + 1) >> 1); 265 else 266 return ref - (diff >> 1); 267 } 268 return diff; 269 } else { 270 if (diff <= 2 * (max - ref - 1)) { 271 if (diff & 1) 272 return ref + ((diff + 1) >> 1); 273 else 274 return ref - (diff >> 1); 275 } 276 return max - (diff + 1); 277 } 278 } 279 280 static int read_segment_id(AV1_COMMON *const cm, const MACROBLOCKD *const xd, 281 aom_reader *r, int skip) { 282 int cdf_num; 283 const uint8_t pred = av1_get_spatial_seg_pred(cm, xd, &cdf_num, 0); 284 if (skip) return pred; 285 286 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 287 struct segmentation *const seg = &cm->seg; 288 struct segmentation_probs *const segp = &ec_ctx->seg; 289 aom_cdf_prob *pred_cdf = segp->spatial_pred_seg_cdf[cdf_num]; 290 const int coded_id = aom_read_symbol(r, pred_cdf, MAX_SEGMENTS, ACCT_STR); 291 const int segment_id = 292 av1_neg_deinterleave(coded_id, pred, seg->last_active_segid + 1); 293 294 if (segment_id < 0 || segment_id > seg->last_active_segid) { 295 aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME, 296 "Corrupted segment_ids"); 297 } 298 return segment_id; 299 } 300 301 static int dec_get_segment_id(const AV1_COMMON *cm, const uint8_t *segment_ids, 302 int mi_offset, int x_mis, int y_mis) { 303 int segment_id = INT_MAX; 304 305 for (int y = 0; y < y_mis; y++) 306 for (int x = 0; x < x_mis; x++) 307 segment_id = AOMMIN( 308 segment_id, segment_ids[mi_offset + y * cm->mi_params.mi_cols + x]); 309 310 assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); 311 return segment_id; 312 } 313 314 static int read_intra_segment_id(AV1_COMMON *const cm, 315 const MACROBLOCKD *const xd, BLOCK_SIZE bsize, 316 aom_reader *r, int skip) { 317 struct segmentation *const seg = &cm->seg; 318 if (!seg->enabled) return 0; // Default for disabled segmentation 319 assert(seg->update_map && !seg->temporal_update); 320 321 const CommonModeInfoParams *const mi_params = &cm->mi_params; 322 const int mi_row = xd->mi_row; 323 const int mi_col = xd->mi_col; 324 const int mi_stride = cm->mi_params.mi_cols; 325 const int mi_offset = mi_row * mi_stride + mi_col; 326 const int bw = mi_size_wide[bsize]; 327 const int bh = mi_size_high[bsize]; 328 const int x_mis = AOMMIN(mi_params->mi_cols - mi_col, bw); 329 const int y_mis = AOMMIN(mi_params->mi_rows - mi_row, bh); 330 const int segment_id = read_segment_id(cm, xd, r, skip); 331 set_segment_id(cm->cur_frame->seg_map, mi_offset, x_mis, y_mis, mi_stride, 332 segment_id); 333 return segment_id; 334 } 335 336 static void copy_segment_id(const CommonModeInfoParams *const mi_params, 337 const uint8_t *last_segment_ids, 338 uint8_t *current_segment_ids, int mi_offset, 339 int x_mis, int y_mis) { 340 const int stride = mi_params->mi_cols; 341 if (last_segment_ids) { 342 assert(last_segment_ids != current_segment_ids); 343 for (int y = 0; y < y_mis; y++) { 344 memcpy(¤t_segment_ids[mi_offset + y * stride], 345 &last_segment_ids[mi_offset + y * stride], 346 sizeof(current_segment_ids[0]) * x_mis); 347 } 348 } else { 349 for (int y = 0; y < y_mis; y++) { 350 memset(¤t_segment_ids[mi_offset + y * stride], 0, 351 sizeof(current_segment_ids[0]) * x_mis); 352 } 353 } 354 } 355 356 static int get_predicted_segment_id(AV1_COMMON *const cm, int mi_offset, 357 int x_mis, int y_mis) { 358 return cm->last_frame_seg_map ? dec_get_segment_id(cm, cm->last_frame_seg_map, 359 mi_offset, x_mis, y_mis) 360 : 0; 361 } 362 363 static int read_inter_segment_id(AV1_COMMON *const cm, MACROBLOCKD *const xd, 364 int preskip, aom_reader *r) { 365 struct segmentation *const seg = &cm->seg; 366 const CommonModeInfoParams *const mi_params = &cm->mi_params; 367 MB_MODE_INFO *const mbmi = xd->mi[0]; 368 const int mi_row = xd->mi_row; 369 const int mi_col = xd->mi_col; 370 const int mi_offset = mi_row * mi_params->mi_cols + mi_col; 371 const int bw = mi_size_wide[mbmi->bsize]; 372 const int bh = mi_size_high[mbmi->bsize]; 373 374 // TODO(slavarnway): move x_mis, y_mis into xd ????? 375 const int x_mis = AOMMIN(mi_params->mi_cols - mi_col, bw); 376 const int y_mis = AOMMIN(mi_params->mi_rows - mi_row, bh); 377 378 if (!seg->enabled) return 0; // Default for disabled segmentation 379 380 if (!seg->update_map) { 381 copy_segment_id(mi_params, cm->last_frame_seg_map, cm->cur_frame->seg_map, 382 mi_offset, x_mis, y_mis); 383 return get_predicted_segment_id(cm, mi_offset, x_mis, y_mis); 384 } 385 386 uint8_t segment_id; 387 const int mi_stride = cm->mi_params.mi_cols; 388 if (preskip) { 389 if (!seg->segid_preskip) return 0; 390 } else { 391 if (mbmi->skip_txfm) { 392 if (seg->temporal_update) { 393 mbmi->seg_id_predicted = 0; 394 } 395 segment_id = read_segment_id(cm, xd, r, 1); 396 set_segment_id(cm->cur_frame->seg_map, mi_offset, x_mis, y_mis, mi_stride, 397 segment_id); 398 return segment_id; 399 } 400 } 401 402 if (seg->temporal_update) { 403 const uint8_t ctx = av1_get_pred_context_seg_id(xd); 404 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 405 struct segmentation_probs *const segp = &ec_ctx->seg; 406 aom_cdf_prob *pred_cdf = segp->pred_cdf[ctx]; 407 mbmi->seg_id_predicted = aom_read_symbol(r, pred_cdf, 2, ACCT_STR); 408 if (mbmi->seg_id_predicted) { 409 segment_id = get_predicted_segment_id(cm, mi_offset, x_mis, y_mis); 410 } else { 411 segment_id = read_segment_id(cm, xd, r, 0); 412 } 413 } else { 414 segment_id = read_segment_id(cm, xd, r, 0); 415 } 416 set_segment_id(cm->cur_frame->seg_map, mi_offset, x_mis, y_mis, mi_stride, 417 segment_id); 418 return segment_id; 419 } 420 421 static int read_skip_mode(AV1_COMMON *cm, const MACROBLOCKD *xd, int segment_id, 422 aom_reader *r) { 423 if (!cm->current_frame.skip_mode_info.skip_mode_flag) return 0; 424 425 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) { 426 return 0; 427 } 428 429 if (!is_comp_ref_allowed(xd->mi[0]->bsize)) return 0; 430 431 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME) || 432 segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { 433 // These features imply single-reference mode, while skip mode implies 434 // compound reference. Hence, the two are mutually exclusive. 435 // In other words, skip_mode is implicitly 0 here. 436 return 0; 437 } 438 439 const int ctx = av1_get_skip_mode_context(xd); 440 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 441 const int skip_mode = 442 aom_read_symbol(r, ec_ctx->skip_mode_cdfs[ctx], 2, ACCT_STR); 443 return skip_mode; 444 } 445 446 static int read_skip_txfm(AV1_COMMON *cm, const MACROBLOCKD *xd, int segment_id, 447 aom_reader *r) { 448 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) { 449 return 1; 450 } else { 451 const int ctx = av1_get_skip_txfm_context(xd); 452 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 453 const int skip_txfm = 454 aom_read_symbol(r, ec_ctx->skip_txfm_cdfs[ctx], 2, ACCT_STR); 455 return skip_txfm; 456 } 457 } 458 459 // Merge the sorted list of cached colors(cached_colors[0...n_cached_colors-1]) 460 // and the sorted list of transmitted colors(colors[n_cached_colors...n-1]) into 461 // one single sorted list(colors[...]). 462 static void merge_colors(uint16_t *colors, uint16_t *cached_colors, 463 int n_colors, int n_cached_colors) { 464 if (n_cached_colors == 0) return; 465 int cache_idx = 0, trans_idx = n_cached_colors; 466 for (int i = 0; i < n_colors; ++i) { 467 if (cache_idx < n_cached_colors && 468 (trans_idx >= n_colors || 469 cached_colors[cache_idx] <= colors[trans_idx])) { 470 colors[i] = cached_colors[cache_idx++]; 471 } else { 472 assert(trans_idx < n_colors); 473 colors[i] = colors[trans_idx++]; 474 } 475 } 476 } 477 478 static void read_palette_colors_y(MACROBLOCKD *const xd, int bit_depth, 479 PALETTE_MODE_INFO *const pmi, aom_reader *r) { 480 uint16_t color_cache[2 * PALETTE_MAX_SIZE]; 481 uint16_t cached_colors[PALETTE_MAX_SIZE]; 482 const int n_cache = av1_get_palette_cache(xd, 0, color_cache); 483 const int n = pmi->palette_size[0]; 484 int idx = 0; 485 for (int i = 0; i < n_cache && idx < n; ++i) 486 if (aom_read_bit(r, ACCT_STR)) cached_colors[idx++] = color_cache[i]; 487 if (idx < n) { 488 const int n_cached_colors = idx; 489 pmi->palette_colors[idx++] = aom_read_literal(r, bit_depth, ACCT_STR); 490 if (idx < n) { 491 const int min_bits = bit_depth - 3; 492 int bits = min_bits + aom_read_literal(r, 2, ACCT_STR); 493 int range = (1 << bit_depth) - pmi->palette_colors[idx - 1] - 1; 494 for (; idx < n; ++idx) { 495 assert(range >= 0); 496 const int delta = aom_read_literal(r, bits, ACCT_STR) + 1; 497 pmi->palette_colors[idx] = clamp(pmi->palette_colors[idx - 1] + delta, 498 0, (1 << bit_depth) - 1); 499 range -= (pmi->palette_colors[idx] - pmi->palette_colors[idx - 1]); 500 bits = AOMMIN(bits, aom_ceil_log2(range)); 501 } 502 } 503 merge_colors(pmi->palette_colors, cached_colors, n, n_cached_colors); 504 } else { 505 memcpy(pmi->palette_colors, cached_colors, n * sizeof(cached_colors[0])); 506 } 507 } 508 509 static void read_palette_colors_uv(MACROBLOCKD *const xd, int bit_depth, 510 PALETTE_MODE_INFO *const pmi, 511 aom_reader *r) { 512 const int n = pmi->palette_size[1]; 513 // U channel colors. 514 uint16_t color_cache[2 * PALETTE_MAX_SIZE]; 515 uint16_t cached_colors[PALETTE_MAX_SIZE]; 516 const int n_cache = av1_get_palette_cache(xd, 1, color_cache); 517 int idx = 0; 518 for (int i = 0; i < n_cache && idx < n; ++i) 519 if (aom_read_bit(r, ACCT_STR)) cached_colors[idx++] = color_cache[i]; 520 if (idx < n) { 521 const int n_cached_colors = idx; 522 idx += PALETTE_MAX_SIZE; 523 pmi->palette_colors[idx++] = aom_read_literal(r, bit_depth, ACCT_STR); 524 if (idx < PALETTE_MAX_SIZE + n) { 525 const int min_bits = bit_depth - 3; 526 int bits = min_bits + aom_read_literal(r, 2, ACCT_STR); 527 int range = (1 << bit_depth) - pmi->palette_colors[idx - 1]; 528 for (; idx < PALETTE_MAX_SIZE + n; ++idx) { 529 assert(range >= 0); 530 const int delta = aom_read_literal(r, bits, ACCT_STR); 531 pmi->palette_colors[idx] = clamp(pmi->palette_colors[idx - 1] + delta, 532 0, (1 << bit_depth) - 1); 533 range -= (pmi->palette_colors[idx] - pmi->palette_colors[idx - 1]); 534 bits = AOMMIN(bits, aom_ceil_log2(range)); 535 } 536 } 537 merge_colors(pmi->palette_colors + PALETTE_MAX_SIZE, cached_colors, n, 538 n_cached_colors); 539 } else { 540 memcpy(pmi->palette_colors + PALETTE_MAX_SIZE, cached_colors, 541 n * sizeof(cached_colors[0])); 542 } 543 544 // V channel colors. 545 if (aom_read_bit(r, ACCT_STR)) { // Delta encoding. 546 const int min_bits_v = bit_depth - 4; 547 const int max_val = 1 << bit_depth; 548 int bits = min_bits_v + aom_read_literal(r, 2, ACCT_STR); 549 pmi->palette_colors[2 * PALETTE_MAX_SIZE] = 550 aom_read_literal(r, bit_depth, ACCT_STR); 551 for (int i = 1; i < n; ++i) { 552 int delta = aom_read_literal(r, bits, ACCT_STR); 553 if (delta && aom_read_bit(r, ACCT_STR)) delta = -delta; 554 int val = (int)pmi->palette_colors[2 * PALETTE_MAX_SIZE + i - 1] + delta; 555 if (val < 0) val += max_val; 556 if (val >= max_val) val -= max_val; 557 pmi->palette_colors[2 * PALETTE_MAX_SIZE + i] = val; 558 } 559 } else { 560 for (int i = 0; i < n; ++i) { 561 pmi->palette_colors[2 * PALETTE_MAX_SIZE + i] = 562 aom_read_literal(r, bit_depth, ACCT_STR); 563 } 564 } 565 } 566 567 static void read_palette_mode_info(AV1_COMMON *const cm, MACROBLOCKD *const xd, 568 aom_reader *r) { 569 const int num_planes = av1_num_planes(cm); 570 MB_MODE_INFO *const mbmi = xd->mi[0]; 571 const BLOCK_SIZE bsize = mbmi->bsize; 572 assert(av1_allow_palette(cm->features.allow_screen_content_tools, bsize)); 573 PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; 574 const int bsize_ctx = av1_get_palette_bsize_ctx(bsize); 575 576 if (mbmi->mode == DC_PRED) { 577 const int palette_mode_ctx = av1_get_palette_mode_ctx(xd); 578 const int modev = aom_read_symbol( 579 r, xd->tile_ctx->palette_y_mode_cdf[bsize_ctx][palette_mode_ctx], 2, 580 ACCT_STR); 581 if (modev) { 582 pmi->palette_size[0] = 583 aom_read_symbol(r, xd->tile_ctx->palette_y_size_cdf[bsize_ctx], 584 PALETTE_SIZES, ACCT_STR) + 585 2; 586 read_palette_colors_y(xd, cm->seq_params->bit_depth, pmi, r); 587 } 588 } 589 if (num_planes > 1 && mbmi->uv_mode == UV_DC_PRED && xd->is_chroma_ref) { 590 const int palette_uv_mode_ctx = (pmi->palette_size[0] > 0); 591 const int modev = aom_read_symbol( 592 r, xd->tile_ctx->palette_uv_mode_cdf[palette_uv_mode_ctx], 2, ACCT_STR); 593 if (modev) { 594 pmi->palette_size[1] = 595 aom_read_symbol(r, xd->tile_ctx->palette_uv_size_cdf[bsize_ctx], 596 PALETTE_SIZES, ACCT_STR) + 597 2; 598 read_palette_colors_uv(xd, cm->seq_params->bit_depth, pmi, r); 599 } 600 } 601 } 602 603 static int read_angle_delta(aom_reader *r, aom_cdf_prob *cdf) { 604 const int sym = aom_read_symbol(r, cdf, 2 * MAX_ANGLE_DELTA + 1, ACCT_STR); 605 return sym - MAX_ANGLE_DELTA; 606 } 607 608 static void read_filter_intra_mode_info(const AV1_COMMON *const cm, 609 MACROBLOCKD *const xd, aom_reader *r) { 610 MB_MODE_INFO *const mbmi = xd->mi[0]; 611 FILTER_INTRA_MODE_INFO *filter_intra_mode_info = 612 &mbmi->filter_intra_mode_info; 613 614 if (av1_filter_intra_allowed(cm, mbmi)) { 615 filter_intra_mode_info->use_filter_intra = aom_read_symbol( 616 r, xd->tile_ctx->filter_intra_cdfs[mbmi->bsize], 2, ACCT_STR); 617 if (filter_intra_mode_info->use_filter_intra) { 618 filter_intra_mode_info->filter_intra_mode = aom_read_symbol( 619 r, xd->tile_ctx->filter_intra_mode_cdf, FILTER_INTRA_MODES, ACCT_STR); 620 } 621 } else { 622 filter_intra_mode_info->use_filter_intra = 0; 623 } 624 } 625 626 void av1_read_tx_type(const AV1_COMMON *const cm, MACROBLOCKD *xd, int blk_row, 627 int blk_col, TX_SIZE tx_size, aom_reader *r) { 628 MB_MODE_INFO *mbmi = xd->mi[0]; 629 uint8_t *tx_type = 630 &xd->tx_type_map[blk_row * xd->tx_type_map_stride + blk_col]; 631 *tx_type = DCT_DCT; 632 633 // No need to read transform type if block is skipped. 634 if (mbmi->skip_txfm || 635 segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) 636 return; 637 638 // No need to read transform type for lossless mode(qindex==0). 639 const int qindex = xd->qindex[mbmi->segment_id]; 640 if (qindex == 0) return; 641 642 const int inter_block = is_inter_block(mbmi); 643 if (get_ext_tx_types(tx_size, inter_block, cm->features.reduced_tx_set_used) > 644 1) { 645 const TxSetType tx_set_type = av1_get_ext_tx_set_type( 646 tx_size, inter_block, cm->features.reduced_tx_set_used); 647 const int eset = 648 get_ext_tx_set(tx_size, inter_block, cm->features.reduced_tx_set_used); 649 // eset == 0 should correspond to a set with only DCT_DCT and 650 // there is no need to read the tx_type 651 assert(eset != 0); 652 653 const TX_SIZE square_tx_size = txsize_sqr_map[tx_size]; 654 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 655 if (inter_block) { 656 *tx_type = av1_ext_tx_inv[tx_set_type][aom_read_symbol( 657 r, ec_ctx->inter_ext_tx_cdf[eset][square_tx_size], 658 av1_num_ext_tx_set[tx_set_type], ACCT_STR)]; 659 } else { 660 const PREDICTION_MODE intra_mode = 661 mbmi->filter_intra_mode_info.use_filter_intra 662 ? fimode_to_intradir[mbmi->filter_intra_mode_info 663 .filter_intra_mode] 664 : mbmi->mode; 665 *tx_type = av1_ext_tx_inv[tx_set_type][aom_read_symbol( 666 r, ec_ctx->intra_ext_tx_cdf[eset][square_tx_size][intra_mode], 667 av1_num_ext_tx_set[tx_set_type], ACCT_STR)]; 668 } 669 } 670 } 671 672 static inline void read_mv(aom_reader *r, MV *mv, const MV *ref, 673 nmv_context *ctx, MvSubpelPrecision precision); 674 675 static inline int is_mv_valid(const MV *mv); 676 677 static inline int assign_dv(AV1_COMMON *cm, MACROBLOCKD *xd, int_mv *mv, 678 const int_mv *ref_mv, int mi_row, int mi_col, 679 BLOCK_SIZE bsize, aom_reader *r) { 680 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 681 read_mv(r, &mv->as_mv, &ref_mv->as_mv, &ec_ctx->ndvc, MV_SUBPEL_NONE); 682 // DV should not have sub-pel. 683 assert((mv->as_mv.col & 7) == 0); 684 assert((mv->as_mv.row & 7) == 0); 685 mv->as_mv.col = (mv->as_mv.col >> 3) * 8; 686 mv->as_mv.row = (mv->as_mv.row >> 3) * 8; 687 int valid = is_mv_valid(&mv->as_mv) && 688 av1_is_dv_valid(mv->as_mv, cm, xd, mi_row, mi_col, bsize, 689 cm->seq_params->mib_size_log2); 690 return valid; 691 } 692 693 static void read_intrabc_info(AV1_COMMON *const cm, DecoderCodingBlock *dcb, 694 aom_reader *r) { 695 MACROBLOCKD *const xd = &dcb->xd; 696 MB_MODE_INFO *const mbmi = xd->mi[0]; 697 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 698 mbmi->use_intrabc = aom_read_symbol(r, ec_ctx->intrabc_cdf, 2, ACCT_STR); 699 if (mbmi->use_intrabc) { 700 BLOCK_SIZE bsize = mbmi->bsize; 701 mbmi->mode = DC_PRED; 702 mbmi->uv_mode = UV_DC_PRED; 703 mbmi->interp_filters = av1_broadcast_interp_filter(BILINEAR); 704 mbmi->motion_mode = SIMPLE_TRANSLATION; 705 706 int16_t inter_mode_ctx[MODE_CTX_REF_FRAMES]; 707 int_mv ref_mvs[INTRA_FRAME + 1][MAX_MV_REF_CANDIDATES]; 708 709 av1_find_mv_refs(cm, xd, mbmi, INTRA_FRAME, dcb->ref_mv_count, 710 xd->ref_mv_stack, xd->weight, ref_mvs, /*global_mvs=*/NULL, 711 inter_mode_ctx); 712 713 int_mv nearestmv, nearmv; 714 715 av1_find_best_ref_mvs(0, ref_mvs[INTRA_FRAME], &nearestmv, &nearmv, 0); 716 int_mv dv_ref = nearestmv.as_int == 0 ? nearmv : nearestmv; 717 if (dv_ref.as_int == 0) 718 av1_find_ref_dv(&dv_ref, &xd->tile, cm->seq_params->mib_size, xd->mi_row); 719 // Ref DV should not have sub-pel. 720 int valid_dv = (dv_ref.as_mv.col & 7) == 0 && (dv_ref.as_mv.row & 7) == 0; 721 dv_ref.as_mv.col = (dv_ref.as_mv.col >> 3) * 8; 722 dv_ref.as_mv.row = (dv_ref.as_mv.row >> 3) * 8; 723 valid_dv = valid_dv && assign_dv(cm, xd, &mbmi->mv[0], &dv_ref, xd->mi_row, 724 xd->mi_col, bsize, r); 725 if (!valid_dv) { 726 // Intra bc motion vectors are not valid - signal corrupt frame 727 aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME, 728 "Invalid intrabc dv"); 729 } 730 } 731 } 732 733 // If delta q is present, reads delta_q index. 734 // Also reads delta_q loop filter levels, if present. 735 static void read_delta_q_params(AV1_COMMON *const cm, MACROBLOCKD *const xd, 736 aom_reader *r) { 737 DeltaQInfo *const delta_q_info = &cm->delta_q_info; 738 739 if (delta_q_info->delta_q_present_flag) { 740 MB_MODE_INFO *const mbmi = xd->mi[0]; 741 xd->current_base_qindex += 742 read_delta_qindex(cm, xd, r, mbmi) * delta_q_info->delta_q_res; 743 /* Normative: Clamp to [1,MAXQ] to not interfere with lossless mode */ 744 xd->current_base_qindex = clamp(xd->current_base_qindex, 1, MAXQ); 745 FRAME_CONTEXT *const ec_ctx = xd->tile_ctx; 746 if (delta_q_info->delta_lf_present_flag) { 747 const int mi_row = xd->mi_row; 748 const int mi_col = xd->mi_col; 749 if (delta_q_info->delta_lf_multi) { 750 const int frame_lf_count = 751 av1_num_planes(cm) > 1 ? FRAME_LF_COUNT : FRAME_LF_COUNT - 2; 752 for (int lf_id = 0; lf_id < frame_lf_count; ++lf_id) { 753 const int tmp_lvl = 754 xd->delta_lf[lf_id] + 755 read_delta_lflevel(cm, r, ec_ctx->delta_lf_multi_cdf[lf_id], mbmi, 756 mi_col, mi_row) * 757 delta_q_info->delta_lf_res; 758 mbmi->delta_lf[lf_id] = xd->delta_lf[lf_id] = 759 clamp(tmp_lvl, -MAX_LOOP_FILTER, MAX_LOOP_FILTER); 760 } 761 } else { 762 const int tmp_lvl = xd->delta_lf_from_base + 763 read_delta_lflevel(cm, r, ec_ctx->delta_lf_cdf, 764 mbmi, mi_col, mi_row) * 765 delta_q_info->delta_lf_res; 766 mbmi->delta_lf_from_base = xd->delta_lf_from_base = 767 clamp(tmp_lvl, -MAX_LOOP_FILTER, MAX_LOOP_FILTER); 768 } 769 } 770 } 771 } 772 773 static void read_intra_frame_mode_info(AV1_COMMON *const cm, 774 DecoderCodingBlock *dcb, aom_reader *r) { 775 MACROBLOCKD *const xd = &dcb->xd; 776 MB_MODE_INFO *const mbmi = xd->mi[0]; 777 const MB_MODE_INFO *above_mi = xd->above_mbmi; 778 const MB_MODE_INFO *left_mi = xd->left_mbmi; 779 const BLOCK_SIZE bsize = mbmi->bsize; 780 struct segmentation *const seg = &cm->seg; 781 782 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 783 784 if (seg->segid_preskip) 785 mbmi->segment_id = read_intra_segment_id(cm, xd, bsize, r, 0); 786 787 mbmi->skip_txfm = read_skip_txfm(cm, xd, mbmi->segment_id, r); 788 789 if (!seg->segid_preskip) 790 mbmi->segment_id = read_intra_segment_id(cm, xd, bsize, r, mbmi->skip_txfm); 791 792 read_cdef(cm, r, xd); 793 794 read_delta_q_params(cm, xd, r); 795 796 mbmi->current_qindex = xd->current_base_qindex; 797 798 mbmi->ref_frame[0] = INTRA_FRAME; 799 mbmi->ref_frame[1] = NONE_FRAME; 800 mbmi->palette_mode_info.palette_size[0] = 0; 801 mbmi->palette_mode_info.palette_size[1] = 0; 802 mbmi->filter_intra_mode_info.use_filter_intra = 0; 803 804 const int mi_row = xd->mi_row; 805 const int mi_col = xd->mi_col; 806 xd->above_txfm_context = cm->above_contexts.txfm[xd->tile.tile_row] + mi_col; 807 xd->left_txfm_context = 808 xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK); 809 810 if (av1_allow_intrabc(cm)) { 811 read_intrabc_info(cm, dcb, r); 812 if (is_intrabc_block(mbmi)) return; 813 } 814 815 mbmi->mode = read_intra_mode(r, get_y_mode_cdf(ec_ctx, above_mi, left_mi)); 816 817 const int use_angle_delta = av1_use_angle_delta(bsize); 818 mbmi->angle_delta[PLANE_TYPE_Y] = 819 (use_angle_delta && av1_is_directional_mode(mbmi->mode)) 820 ? read_angle_delta(r, ec_ctx->angle_delta_cdf[mbmi->mode - V_PRED]) 821 : 0; 822 823 if (!cm->seq_params->monochrome && xd->is_chroma_ref) { 824 mbmi->uv_mode = 825 read_intra_mode_uv(ec_ctx, r, is_cfl_allowed(xd), mbmi->mode); 826 if (mbmi->uv_mode == UV_CFL_PRED) { 827 mbmi->cfl_alpha_idx = read_cfl_alphas(ec_ctx, r, &mbmi->cfl_alpha_signs); 828 } 829 const PREDICTION_MODE intra_mode = get_uv_mode(mbmi->uv_mode); 830 mbmi->angle_delta[PLANE_TYPE_UV] = 831 (use_angle_delta && av1_is_directional_mode(intra_mode)) 832 ? read_angle_delta(r, ec_ctx->angle_delta_cdf[intra_mode - V_PRED]) 833 : 0; 834 } else { 835 // Avoid decoding angle_info if there is no chroma prediction 836 mbmi->uv_mode = UV_DC_PRED; 837 } 838 xd->cfl.store_y = store_cfl_required(cm, xd); 839 840 if (av1_allow_palette(cm->features.allow_screen_content_tools, bsize)) 841 read_palette_mode_info(cm, xd, r); 842 843 read_filter_intra_mode_info(cm, xd, r); 844 } 845 846 static int read_mv_component(aom_reader *r, nmv_component *mvcomp, 847 int use_subpel, int usehp) { 848 int mag, d, fr, hp; 849 const int sign = aom_read_symbol(r, mvcomp->sign_cdf, 2, ACCT_STR); 850 const int mv_class = 851 aom_read_symbol(r, mvcomp->classes_cdf, MV_CLASSES, ACCT_STR); 852 const int class0 = mv_class == MV_CLASS_0; 853 854 // Integer part 855 if (class0) { 856 d = aom_read_symbol(r, mvcomp->class0_cdf, CLASS0_SIZE, ACCT_STR); 857 mag = 0; 858 } else { 859 const int n = mv_class + CLASS0_BITS - 1; // number of bits 860 d = 0; 861 for (int i = 0; i < n; ++i) 862 d |= aom_read_symbol(r, mvcomp->bits_cdf[i], 2, ACCT_STR) << i; 863 mag = CLASS0_SIZE << (mv_class + 2); 864 } 865 866 if (use_subpel) { 867 // Fractional part 868 fr = aom_read_symbol(r, class0 ? mvcomp->class0_fp_cdf[d] : mvcomp->fp_cdf, 869 MV_FP_SIZE, ACCT_STR); 870 871 // High precision part (if hp is not used, the default value of the hp is 1) 872 hp = usehp ? aom_read_symbol( 873 r, class0 ? mvcomp->class0_hp_cdf : mvcomp->hp_cdf, 2, 874 ACCT_STR) 875 : 1; 876 } else { 877 fr = 3; 878 hp = 1; 879 } 880 881 // Result 882 mag += ((d << 3) | (fr << 1) | hp) + 1; 883 return sign ? -mag : mag; 884 } 885 886 static inline void read_mv(aom_reader *r, MV *mv, const MV *ref, 887 nmv_context *ctx, MvSubpelPrecision precision) { 888 MV diff = kZeroMv; 889 const MV_JOINT_TYPE joint_type = 890 (MV_JOINT_TYPE)aom_read_symbol(r, ctx->joints_cdf, MV_JOINTS, ACCT_STR); 891 892 if (mv_joint_vertical(joint_type)) 893 diff.row = read_mv_component(r, &ctx->comps[0], precision > MV_SUBPEL_NONE, 894 precision > MV_SUBPEL_LOW_PRECISION); 895 896 if (mv_joint_horizontal(joint_type)) 897 diff.col = read_mv_component(r, &ctx->comps[1], precision > MV_SUBPEL_NONE, 898 precision > MV_SUBPEL_LOW_PRECISION); 899 900 mv->row = ref->row + diff.row; 901 mv->col = ref->col + diff.col; 902 } 903 904 static REFERENCE_MODE read_block_reference_mode(AV1_COMMON *cm, 905 const MACROBLOCKD *xd, 906 aom_reader *r) { 907 if (!is_comp_ref_allowed(xd->mi[0]->bsize)) return SINGLE_REFERENCE; 908 if (cm->current_frame.reference_mode == REFERENCE_MODE_SELECT) { 909 const int ctx = av1_get_reference_mode_context(xd); 910 const REFERENCE_MODE mode = (REFERENCE_MODE)aom_read_symbol( 911 r, xd->tile_ctx->comp_inter_cdf[ctx], 2, ACCT_STR); 912 return mode; // SINGLE_REFERENCE or COMPOUND_REFERENCE 913 } else { 914 assert(cm->current_frame.reference_mode == SINGLE_REFERENCE); 915 return cm->current_frame.reference_mode; 916 } 917 } 918 919 #define READ_REF_BIT(pname) \ 920 aom_read_symbol(r, av1_get_pred_cdf_##pname(xd), 2, ACCT_STR) 921 922 static COMP_REFERENCE_TYPE read_comp_reference_type(const MACROBLOCKD *xd, 923 aom_reader *r) { 924 const int ctx = av1_get_comp_reference_type_context(xd); 925 const COMP_REFERENCE_TYPE comp_ref_type = 926 (COMP_REFERENCE_TYPE)aom_read_symbol( 927 r, xd->tile_ctx->comp_ref_type_cdf[ctx], 2, ACCT_STR); 928 return comp_ref_type; // UNIDIR_COMP_REFERENCE or BIDIR_COMP_REFERENCE 929 } 930 931 static void set_ref_frames_for_skip_mode(AV1_COMMON *const cm, 932 MV_REFERENCE_FRAME ref_frame[2]) { 933 ref_frame[0] = LAST_FRAME + cm->current_frame.skip_mode_info.ref_frame_idx_0; 934 ref_frame[1] = LAST_FRAME + cm->current_frame.skip_mode_info.ref_frame_idx_1; 935 } 936 937 // Read the referncence frame 938 static void read_ref_frames(AV1_COMMON *const cm, MACROBLOCKD *const xd, 939 aom_reader *r, int segment_id, 940 MV_REFERENCE_FRAME ref_frame[2]) { 941 if (xd->mi[0]->skip_mode) { 942 set_ref_frames_for_skip_mode(cm, ref_frame); 943 return; 944 } 945 946 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) { 947 ref_frame[0] = (MV_REFERENCE_FRAME)get_segdata(&cm->seg, segment_id, 948 SEG_LVL_REF_FRAME); 949 ref_frame[1] = NONE_FRAME; 950 } else if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP) || 951 segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { 952 ref_frame[0] = LAST_FRAME; 953 ref_frame[1] = NONE_FRAME; 954 } else { 955 const REFERENCE_MODE mode = read_block_reference_mode(cm, xd, r); 956 957 if (mode == COMPOUND_REFERENCE) { 958 const COMP_REFERENCE_TYPE comp_ref_type = read_comp_reference_type(xd, r); 959 960 if (comp_ref_type == UNIDIR_COMP_REFERENCE) { 961 const int bit = READ_REF_BIT(uni_comp_ref_p); 962 if (bit) { 963 ref_frame[0] = BWDREF_FRAME; 964 ref_frame[1] = ALTREF_FRAME; 965 } else { 966 const int bit1 = READ_REF_BIT(uni_comp_ref_p1); 967 if (bit1) { 968 const int bit2 = READ_REF_BIT(uni_comp_ref_p2); 969 if (bit2) { 970 ref_frame[0] = LAST_FRAME; 971 ref_frame[1] = GOLDEN_FRAME; 972 } else { 973 ref_frame[0] = LAST_FRAME; 974 ref_frame[1] = LAST3_FRAME; 975 } 976 } else { 977 ref_frame[0] = LAST_FRAME; 978 ref_frame[1] = LAST2_FRAME; 979 } 980 } 981 982 return; 983 } 984 985 assert(comp_ref_type == BIDIR_COMP_REFERENCE); 986 987 const int idx = 1; 988 const int bit = READ_REF_BIT(comp_ref_p); 989 // Decode forward references. 990 if (!bit) { 991 const int bit1 = READ_REF_BIT(comp_ref_p1); 992 ref_frame[!idx] = bit1 ? LAST2_FRAME : LAST_FRAME; 993 } else { 994 const int bit2 = READ_REF_BIT(comp_ref_p2); 995 ref_frame[!idx] = bit2 ? GOLDEN_FRAME : LAST3_FRAME; 996 } 997 998 // Decode backward references. 999 const int bit_bwd = READ_REF_BIT(comp_bwdref_p); 1000 if (!bit_bwd) { 1001 const int bit1_bwd = READ_REF_BIT(comp_bwdref_p1); 1002 ref_frame[idx] = bit1_bwd ? ALTREF2_FRAME : BWDREF_FRAME; 1003 } else { 1004 ref_frame[idx] = ALTREF_FRAME; 1005 } 1006 } else if (mode == SINGLE_REFERENCE) { 1007 const int bit0 = READ_REF_BIT(single_ref_p1); 1008 if (bit0) { 1009 const int bit1 = READ_REF_BIT(single_ref_p2); 1010 if (!bit1) { 1011 const int bit5 = READ_REF_BIT(single_ref_p6); 1012 ref_frame[0] = bit5 ? ALTREF2_FRAME : BWDREF_FRAME; 1013 } else { 1014 ref_frame[0] = ALTREF_FRAME; 1015 } 1016 } else { 1017 const int bit2 = READ_REF_BIT(single_ref_p3); 1018 if (bit2) { 1019 const int bit4 = READ_REF_BIT(single_ref_p5); 1020 ref_frame[0] = bit4 ? GOLDEN_FRAME : LAST3_FRAME; 1021 } else { 1022 const int bit3 = READ_REF_BIT(single_ref_p4); 1023 ref_frame[0] = bit3 ? LAST2_FRAME : LAST_FRAME; 1024 } 1025 } 1026 1027 ref_frame[1] = NONE_FRAME; 1028 } else { 1029 assert(0 && "Invalid prediction mode."); 1030 } 1031 } 1032 } 1033 1034 static inline void read_mb_interp_filter(const MACROBLOCKD *const xd, 1035 InterpFilter interp_filter, 1036 bool enable_dual_filter, 1037 MB_MODE_INFO *const mbmi, 1038 aom_reader *r) { 1039 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 1040 1041 if (!av1_is_interp_needed(xd)) { 1042 set_default_interp_filters(mbmi, interp_filter); 1043 return; 1044 } 1045 1046 if (interp_filter != SWITCHABLE) { 1047 mbmi->interp_filters = av1_broadcast_interp_filter(interp_filter); 1048 } else { 1049 InterpFilter ref0_filter[2] = { EIGHTTAP_REGULAR, EIGHTTAP_REGULAR }; 1050 for (int dir = 0; dir < 2; ++dir) { 1051 const int ctx = av1_get_pred_context_switchable_interp(xd, dir); 1052 ref0_filter[dir] = (InterpFilter)aom_read_symbol( 1053 r, ec_ctx->switchable_interp_cdf[ctx], SWITCHABLE_FILTERS, ACCT_STR); 1054 if (!enable_dual_filter) { 1055 ref0_filter[1] = ref0_filter[0]; 1056 break; 1057 } 1058 } 1059 // The index system works as: (0, 1) -> (vertical, horizontal) filter types 1060 mbmi->interp_filters.as_filters.x_filter = ref0_filter[1]; 1061 mbmi->interp_filters.as_filters.y_filter = ref0_filter[0]; 1062 } 1063 } 1064 1065 static void read_intra_block_mode_info(AV1_COMMON *const cm, 1066 MACROBLOCKD *const xd, 1067 MB_MODE_INFO *const mbmi, 1068 aom_reader *r) { 1069 const BLOCK_SIZE bsize = mbmi->bsize; 1070 const int use_angle_delta = av1_use_angle_delta(bsize); 1071 1072 mbmi->ref_frame[0] = INTRA_FRAME; 1073 mbmi->ref_frame[1] = NONE_FRAME; 1074 1075 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 1076 1077 mbmi->mode = read_intra_mode(r, ec_ctx->y_mode_cdf[size_group_lookup[bsize]]); 1078 1079 mbmi->angle_delta[PLANE_TYPE_Y] = 1080 use_angle_delta && av1_is_directional_mode(mbmi->mode) 1081 ? read_angle_delta(r, ec_ctx->angle_delta_cdf[mbmi->mode - V_PRED]) 1082 : 0; 1083 if (!cm->seq_params->monochrome && xd->is_chroma_ref) { 1084 mbmi->uv_mode = 1085 read_intra_mode_uv(ec_ctx, r, is_cfl_allowed(xd), mbmi->mode); 1086 if (mbmi->uv_mode == UV_CFL_PRED) { 1087 mbmi->cfl_alpha_idx = 1088 read_cfl_alphas(xd->tile_ctx, r, &mbmi->cfl_alpha_signs); 1089 } 1090 const PREDICTION_MODE intra_mode = get_uv_mode(mbmi->uv_mode); 1091 mbmi->angle_delta[PLANE_TYPE_UV] = 1092 use_angle_delta && av1_is_directional_mode(intra_mode) 1093 ? read_angle_delta(r, ec_ctx->angle_delta_cdf[intra_mode - V_PRED]) 1094 : 0; 1095 } else { 1096 // Avoid decoding angle_info if there is no chroma prediction 1097 mbmi->uv_mode = UV_DC_PRED; 1098 } 1099 xd->cfl.store_y = store_cfl_required(cm, xd); 1100 1101 mbmi->palette_mode_info.palette_size[0] = 0; 1102 mbmi->palette_mode_info.palette_size[1] = 0; 1103 if (av1_allow_palette(cm->features.allow_screen_content_tools, bsize)) 1104 read_palette_mode_info(cm, xd, r); 1105 1106 read_filter_intra_mode_info(cm, xd, r); 1107 } 1108 1109 static inline int is_mv_valid(const MV *mv) { 1110 return mv->row > MV_LOW && mv->row < MV_UPP && mv->col > MV_LOW && 1111 mv->col < MV_UPP; 1112 } 1113 1114 static inline int assign_mv(AV1_COMMON *cm, MACROBLOCKD *xd, 1115 PREDICTION_MODE mode, 1116 MV_REFERENCE_FRAME ref_frame[2], int_mv mv[2], 1117 int_mv ref_mv[2], int_mv nearest_mv[2], 1118 int_mv near_mv[2], int is_compound, int allow_hp, 1119 aom_reader *r) { 1120 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 1121 MB_MODE_INFO *mbmi = xd->mi[0]; 1122 BLOCK_SIZE bsize = mbmi->bsize; 1123 FeatureFlags *const features = &cm->features; 1124 if (features->cur_frame_force_integer_mv) { 1125 allow_hp = MV_SUBPEL_NONE; 1126 } 1127 switch (mode) { 1128 case NEWMV: { 1129 nmv_context *const nmvc = &ec_ctx->nmvc; 1130 read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); 1131 break; 1132 } 1133 case NEARESTMV: { 1134 mv[0].as_int = nearest_mv[0].as_int; 1135 break; 1136 } 1137 case NEARMV: { 1138 mv[0].as_int = near_mv[0].as_int; 1139 break; 1140 } 1141 case GLOBALMV: { 1142 mv[0].as_int = gm_get_motion_vector(&cm->global_motion[ref_frame[0]], 1143 features->allow_high_precision_mv, 1144 bsize, xd->mi_col, xd->mi_row, 1145 features->cur_frame_force_integer_mv) 1146 .as_int; 1147 break; 1148 } 1149 case NEW_NEWMV: { 1150 assert(is_compound); 1151 for (int i = 0; i < 2; ++i) { 1152 nmv_context *const nmvc = &ec_ctx->nmvc; 1153 read_mv(r, &mv[i].as_mv, &ref_mv[i].as_mv, nmvc, allow_hp); 1154 } 1155 break; 1156 } 1157 case NEAREST_NEARESTMV: { 1158 assert(is_compound); 1159 mv[0].as_int = nearest_mv[0].as_int; 1160 mv[1].as_int = nearest_mv[1].as_int; 1161 break; 1162 } 1163 case NEAR_NEARMV: { 1164 assert(is_compound); 1165 mv[0].as_int = near_mv[0].as_int; 1166 mv[1].as_int = near_mv[1].as_int; 1167 break; 1168 } 1169 case NEW_NEARESTMV: { 1170 nmv_context *const nmvc = &ec_ctx->nmvc; 1171 read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); 1172 assert(is_compound); 1173 mv[1].as_int = nearest_mv[1].as_int; 1174 break; 1175 } 1176 case NEAREST_NEWMV: { 1177 nmv_context *const nmvc = &ec_ctx->nmvc; 1178 mv[0].as_int = nearest_mv[0].as_int; 1179 read_mv(r, &mv[1].as_mv, &ref_mv[1].as_mv, nmvc, allow_hp); 1180 assert(is_compound); 1181 break; 1182 } 1183 case NEAR_NEWMV: { 1184 nmv_context *const nmvc = &ec_ctx->nmvc; 1185 mv[0].as_int = near_mv[0].as_int; 1186 read_mv(r, &mv[1].as_mv, &ref_mv[1].as_mv, nmvc, allow_hp); 1187 assert(is_compound); 1188 break; 1189 } 1190 case NEW_NEARMV: { 1191 nmv_context *const nmvc = &ec_ctx->nmvc; 1192 read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); 1193 assert(is_compound); 1194 mv[1].as_int = near_mv[1].as_int; 1195 break; 1196 } 1197 case GLOBAL_GLOBALMV: { 1198 assert(is_compound); 1199 mv[0].as_int = gm_get_motion_vector(&cm->global_motion[ref_frame[0]], 1200 features->allow_high_precision_mv, 1201 bsize, xd->mi_col, xd->mi_row, 1202 features->cur_frame_force_integer_mv) 1203 .as_int; 1204 mv[1].as_int = gm_get_motion_vector(&cm->global_motion[ref_frame[1]], 1205 features->allow_high_precision_mv, 1206 bsize, xd->mi_col, xd->mi_row, 1207 features->cur_frame_force_integer_mv) 1208 .as_int; 1209 break; 1210 } 1211 default: { 1212 return 0; 1213 } 1214 } 1215 1216 int ret = is_mv_valid(&mv[0].as_mv); 1217 if (is_compound) { 1218 ret = ret && is_mv_valid(&mv[1].as_mv); 1219 } 1220 return ret; 1221 } 1222 1223 static int read_is_inter_block(AV1_COMMON *const cm, MACROBLOCKD *const xd, 1224 int segment_id, aom_reader *r) { 1225 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) { 1226 const int frame = get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME); 1227 if (frame < LAST_FRAME) return 0; 1228 return frame != INTRA_FRAME; 1229 } 1230 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { 1231 return 1; 1232 } 1233 const int ctx = av1_get_intra_inter_context(xd); 1234 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 1235 const int is_inter = 1236 aom_read_symbol(r, ec_ctx->intra_inter_cdf[ctx], 2, ACCT_STR); 1237 return is_inter; 1238 } 1239 1240 #if DEC_MISMATCH_DEBUG 1241 static void dec_dump_logs(AV1_COMMON *cm, MB_MODE_INFO *const mbmi, int mi_row, 1242 int mi_col, int16_t mode_ctx) { 1243 int_mv mv[2] = { { 0 } }; 1244 for (int ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) 1245 mv[ref].as_mv = mbmi->mv[ref].as_mv; 1246 1247 const int16_t newmv_ctx = mode_ctx & NEWMV_CTX_MASK; 1248 int16_t zeromv_ctx = -1; 1249 int16_t refmv_ctx = -1; 1250 if (mbmi->mode != NEWMV) { 1251 zeromv_ctx = (mode_ctx >> GLOBALMV_OFFSET) & GLOBALMV_CTX_MASK; 1252 if (mbmi->mode != GLOBALMV) 1253 refmv_ctx = (mode_ctx >> REFMV_OFFSET) & REFMV_CTX_MASK; 1254 } 1255 1256 #define FRAME_TO_CHECK 11 1257 if (cm->current_frame.frame_number == FRAME_TO_CHECK && cm->show_frame == 1) { 1258 printf( 1259 "=== DECODER ===: " 1260 "Frame=%d, (mi_row,mi_col)=(%d,%d), skip_mode=%d, mode=%d, bsize=%d, " 1261 "show_frame=%d, mv[0]=(%d,%d), mv[1]=(%d,%d), ref[0]=%d, " 1262 "ref[1]=%d, motion_mode=%d, mode_ctx=%d, " 1263 "newmv_ctx=%d, zeromv_ctx=%d, refmv_ctx=%d, tx_size=%d\n", 1264 cm->current_frame.frame_number, mi_row, mi_col, mbmi->skip_mode, 1265 mbmi->mode, mbmi->sb_type, cm->show_frame, mv[0].as_mv.row, 1266 mv[0].as_mv.col, mv[1].as_mv.row, mv[1].as_mv.col, mbmi->ref_frame[0], 1267 mbmi->ref_frame[1], mbmi->motion_mode, mode_ctx, newmv_ctx, zeromv_ctx, 1268 refmv_ctx, mbmi->tx_size); 1269 } 1270 } 1271 #endif // DEC_MISMATCH_DEBUG 1272 1273 static void read_inter_block_mode_info(AV1Decoder *const pbi, 1274 DecoderCodingBlock *dcb, 1275 MB_MODE_INFO *const mbmi, 1276 aom_reader *r) { 1277 AV1_COMMON *const cm = &pbi->common; 1278 FeatureFlags *const features = &cm->features; 1279 const BLOCK_SIZE bsize = mbmi->bsize; 1280 const int allow_hp = features->allow_high_precision_mv; 1281 int_mv nearestmv[2], nearmv[2]; 1282 int_mv ref_mvs[MODE_CTX_REF_FRAMES][MAX_MV_REF_CANDIDATES] = { { { 0 } } }; 1283 int16_t inter_mode_ctx[MODE_CTX_REF_FRAMES]; 1284 int pts[SAMPLES_ARRAY_SIZE], pts_inref[SAMPLES_ARRAY_SIZE]; 1285 MACROBLOCKD *const xd = &dcb->xd; 1286 FRAME_CONTEXT *ec_ctx = xd->tile_ctx; 1287 1288 mbmi->uv_mode = UV_DC_PRED; 1289 mbmi->palette_mode_info.palette_size[0] = 0; 1290 mbmi->palette_mode_info.palette_size[1] = 0; 1291 1292 av1_collect_neighbors_ref_counts(xd); 1293 1294 read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame); 1295 const int is_compound = has_second_ref(mbmi); 1296 1297 const MV_REFERENCE_FRAME ref_frame = av1_ref_frame_type(mbmi->ref_frame); 1298 av1_find_mv_refs(cm, xd, mbmi, ref_frame, dcb->ref_mv_count, xd->ref_mv_stack, 1299 xd->weight, ref_mvs, /*global_mvs=*/NULL, inter_mode_ctx); 1300 1301 mbmi->ref_mv_idx = 0; 1302 1303 if (mbmi->skip_mode) { 1304 assert(is_compound); 1305 mbmi->mode = NEAREST_NEARESTMV; 1306 } else { 1307 if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP) || 1308 segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_GLOBALMV)) { 1309 mbmi->mode = GLOBALMV; 1310 } else { 1311 const int mode_ctx = 1312 av1_mode_context_analyzer(inter_mode_ctx, mbmi->ref_frame); 1313 if (is_compound) 1314 mbmi->mode = read_inter_compound_mode(xd, r, mode_ctx); 1315 else 1316 mbmi->mode = read_inter_mode(ec_ctx, r, mode_ctx); 1317 if (mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV || 1318 have_nearmv_in_inter_mode(mbmi->mode)) 1319 read_drl_idx(ec_ctx, dcb, mbmi, r); 1320 } 1321 } 1322 1323 if (is_compound != is_inter_compound_mode(mbmi->mode)) { 1324 aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME, 1325 "Prediction mode %d invalid with ref frame %d %d", 1326 mbmi->mode, mbmi->ref_frame[0], mbmi->ref_frame[1]); 1327 } 1328 1329 if (!is_compound && mbmi->mode != GLOBALMV) { 1330 av1_find_best_ref_mvs(allow_hp, ref_mvs[mbmi->ref_frame[0]], &nearestmv[0], 1331 &nearmv[0], features->cur_frame_force_integer_mv); 1332 } 1333 1334 if (is_compound && mbmi->mode != GLOBAL_GLOBALMV) { 1335 const int ref_mv_idx = mbmi->ref_mv_idx + 1; 1336 nearestmv[0] = xd->ref_mv_stack[ref_frame][0].this_mv; 1337 nearestmv[1] = xd->ref_mv_stack[ref_frame][0].comp_mv; 1338 nearmv[0] = xd->ref_mv_stack[ref_frame][ref_mv_idx].this_mv; 1339 nearmv[1] = xd->ref_mv_stack[ref_frame][ref_mv_idx].comp_mv; 1340 lower_mv_precision(&nearestmv[0].as_mv, allow_hp, 1341 features->cur_frame_force_integer_mv); 1342 lower_mv_precision(&nearestmv[1].as_mv, allow_hp, 1343 features->cur_frame_force_integer_mv); 1344 lower_mv_precision(&nearmv[0].as_mv, allow_hp, 1345 features->cur_frame_force_integer_mv); 1346 lower_mv_precision(&nearmv[1].as_mv, allow_hp, 1347 features->cur_frame_force_integer_mv); 1348 } else if (mbmi->ref_mv_idx > 0 && mbmi->mode == NEARMV) { 1349 nearmv[0] = 1350 xd->ref_mv_stack[mbmi->ref_frame[0]][1 + mbmi->ref_mv_idx].this_mv; 1351 } 1352 1353 int_mv ref_mv[2] = { nearestmv[0], nearestmv[1] }; 1354 1355 if (is_compound) { 1356 int ref_mv_idx = mbmi->ref_mv_idx; 1357 // Special case: NEAR_NEWMV and NEW_NEARMV modes use 1358 // 1 + mbmi->ref_mv_idx (like NEARMV) instead of 1359 // mbmi->ref_mv_idx (like NEWMV) 1360 if (mbmi->mode == NEAR_NEWMV || mbmi->mode == NEW_NEARMV) 1361 ref_mv_idx = 1 + mbmi->ref_mv_idx; 1362 1363 // TODO(jingning, yunqing): Do we need a lower_mv_precision() call here? 1364 if (compound_ref0_mode(mbmi->mode) == NEWMV) 1365 ref_mv[0] = xd->ref_mv_stack[ref_frame][ref_mv_idx].this_mv; 1366 1367 if (compound_ref1_mode(mbmi->mode) == NEWMV) 1368 ref_mv[1] = xd->ref_mv_stack[ref_frame][ref_mv_idx].comp_mv; 1369 } else { 1370 if (mbmi->mode == NEWMV) { 1371 if (dcb->ref_mv_count[ref_frame] > 1) 1372 ref_mv[0] = xd->ref_mv_stack[ref_frame][mbmi->ref_mv_idx].this_mv; 1373 } 1374 } 1375 1376 if (mbmi->skip_mode) assert(mbmi->mode == NEAREST_NEARESTMV); 1377 1378 const int mv_corrupted_flag = 1379 !assign_mv(cm, xd, mbmi->mode, mbmi->ref_frame, mbmi->mv, ref_mv, 1380 nearestmv, nearmv, is_compound, allow_hp, r); 1381 aom_merge_corrupted_flag(&dcb->corrupted, mv_corrupted_flag); 1382 1383 mbmi->use_wedge_interintra = 0; 1384 if (cm->seq_params->enable_interintra_compound && !mbmi->skip_mode && 1385 is_interintra_allowed(mbmi)) { 1386 const int bsize_group = size_group_lookup[bsize]; 1387 const int interintra = 1388 aom_read_symbol(r, ec_ctx->interintra_cdf[bsize_group], 2, ACCT_STR); 1389 assert(mbmi->ref_frame[1] == NONE_FRAME); 1390 if (interintra) { 1391 const INTERINTRA_MODE interintra_mode = 1392 read_interintra_mode(xd, r, bsize_group); 1393 mbmi->ref_frame[1] = INTRA_FRAME; 1394 mbmi->interintra_mode = interintra_mode; 1395 mbmi->angle_delta[PLANE_TYPE_Y] = 0; 1396 mbmi->angle_delta[PLANE_TYPE_UV] = 0; 1397 mbmi->filter_intra_mode_info.use_filter_intra = 0; 1398 if (av1_is_wedge_used(bsize)) { 1399 mbmi->use_wedge_interintra = aom_read_symbol( 1400 r, ec_ctx->wedge_interintra_cdf[bsize], 2, ACCT_STR); 1401 if (mbmi->use_wedge_interintra) { 1402 mbmi->interintra_wedge_index = (int8_t)aom_read_symbol( 1403 r, ec_ctx->wedge_idx_cdf[bsize], MAX_WEDGE_TYPES, ACCT_STR); 1404 } 1405 } 1406 } 1407 } 1408 1409 for (int ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) { 1410 const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref]; 1411 xd->block_ref_scale_factors[ref] = get_ref_scale_factors_const(cm, frame); 1412 } 1413 1414 mbmi->motion_mode = SIMPLE_TRANSLATION; 1415 if (is_motion_variation_allowed_bsize(mbmi->bsize) && !mbmi->skip_mode && 1416 !has_second_ref(mbmi)) { 1417 mbmi->num_proj_ref = av1_findSamples(cm, xd, pts, pts_inref); 1418 } 1419 av1_count_overlappable_neighbors(cm, xd); 1420 1421 if (mbmi->ref_frame[1] != INTRA_FRAME) 1422 mbmi->motion_mode = read_motion_mode(cm, xd, mbmi, r); 1423 1424 // init 1425 mbmi->comp_group_idx = 0; 1426 mbmi->compound_idx = 1; 1427 mbmi->interinter_comp.type = COMPOUND_AVERAGE; 1428 1429 if (has_second_ref(mbmi) && !mbmi->skip_mode) { 1430 // Read idx to indicate current compound inter prediction mode group 1431 const int masked_compound_used = is_any_masked_compound_used(bsize) && 1432 cm->seq_params->enable_masked_compound; 1433 1434 if (masked_compound_used) { 1435 const int ctx_comp_group_idx = get_comp_group_idx_context(xd); 1436 mbmi->comp_group_idx = (uint8_t)aom_read_symbol( 1437 r, ec_ctx->comp_group_idx_cdf[ctx_comp_group_idx], 2, ACCT_STR); 1438 } 1439 1440 if (mbmi->comp_group_idx == 0) { 1441 if (cm->seq_params->order_hint_info.enable_dist_wtd_comp) { 1442 const int comp_index_ctx = get_comp_index_context(cm, xd); 1443 mbmi->compound_idx = (uint8_t)aom_read_symbol( 1444 r, ec_ctx->compound_index_cdf[comp_index_ctx], 2, ACCT_STR); 1445 mbmi->interinter_comp.type = 1446 mbmi->compound_idx ? COMPOUND_AVERAGE : COMPOUND_DISTWTD; 1447 } else { 1448 // Distance-weighted compound is disabled, so always use average 1449 mbmi->compound_idx = 1; 1450 mbmi->interinter_comp.type = COMPOUND_AVERAGE; 1451 } 1452 } else { 1453 assert(cm->current_frame.reference_mode != SINGLE_REFERENCE && 1454 is_inter_compound_mode(mbmi->mode) && 1455 mbmi->motion_mode == SIMPLE_TRANSLATION); 1456 assert(masked_compound_used); 1457 1458 // compound_diffwtd, wedge 1459 if (is_interinter_compound_used(COMPOUND_WEDGE, bsize)) { 1460 mbmi->interinter_comp.type = 1461 COMPOUND_WEDGE + aom_read_symbol(r, 1462 ec_ctx->compound_type_cdf[bsize], 1463 MASKED_COMPOUND_TYPES, ACCT_STR); 1464 } else { 1465 mbmi->interinter_comp.type = COMPOUND_DIFFWTD; 1466 } 1467 1468 if (mbmi->interinter_comp.type == COMPOUND_WEDGE) { 1469 assert(is_interinter_compound_used(COMPOUND_WEDGE, bsize)); 1470 mbmi->interinter_comp.wedge_index = (int8_t)aom_read_symbol( 1471 r, ec_ctx->wedge_idx_cdf[bsize], MAX_WEDGE_TYPES, ACCT_STR); 1472 mbmi->interinter_comp.wedge_sign = (int8_t)aom_read_bit(r, ACCT_STR); 1473 } else { 1474 assert(mbmi->interinter_comp.type == COMPOUND_DIFFWTD); 1475 mbmi->interinter_comp.mask_type = 1476 aom_read_literal(r, MAX_DIFFWTD_MASK_BITS, ACCT_STR); 1477 } 1478 } 1479 } 1480 1481 read_mb_interp_filter(xd, features->interp_filter, 1482 cm->seq_params->enable_dual_filter, mbmi, r); 1483 1484 if (mbmi->motion_mode == WARPED_CAUSAL) { 1485 const int mi_row = xd->mi_row; 1486 const int mi_col = xd->mi_col; 1487 mbmi->wm_params.wmtype = DEFAULT_WMTYPE; 1488 mbmi->wm_params.invalid = 0; 1489 1490 if (mbmi->num_proj_ref > 1) { 1491 mbmi->num_proj_ref = av1_selectSamples(&mbmi->mv[0].as_mv, pts, pts_inref, 1492 mbmi->num_proj_ref, bsize); 1493 } 1494 1495 if (av1_find_projection(mbmi->num_proj_ref, pts, pts_inref, bsize, 1496 mbmi->mv[0].as_mv.row, mbmi->mv[0].as_mv.col, 1497 &mbmi->wm_params, mi_row, mi_col)) { 1498 #if WARPED_MOTION_DEBUG 1499 printf("Warning: unexpected warped model from aomenc\n"); 1500 #endif 1501 mbmi->wm_params.invalid = 1; 1502 } 1503 } 1504 1505 xd->cfl.store_y = store_cfl_required(cm, xd); 1506 1507 #if DEC_MISMATCH_DEBUG 1508 dec_dump_logs(cm, mi, mi_row, mi_col, mode_ctx); 1509 #endif // DEC_MISMATCH_DEBUG 1510 } 1511 1512 static void read_inter_frame_mode_info(AV1Decoder *const pbi, 1513 DecoderCodingBlock *dcb, aom_reader *r) { 1514 AV1_COMMON *const cm = &pbi->common; 1515 MACROBLOCKD *const xd = &dcb->xd; 1516 MB_MODE_INFO *const mbmi = xd->mi[0]; 1517 int inter_block = 1; 1518 1519 mbmi->mv[0].as_int = 0; 1520 mbmi->mv[1].as_int = 0; 1521 mbmi->segment_id = read_inter_segment_id(cm, xd, 1, r); 1522 1523 mbmi->skip_mode = read_skip_mode(cm, xd, mbmi->segment_id, r); 1524 1525 if (mbmi->skip_mode) 1526 mbmi->skip_txfm = 1; 1527 else 1528 mbmi->skip_txfm = read_skip_txfm(cm, xd, mbmi->segment_id, r); 1529 1530 if (!cm->seg.segid_preskip) 1531 mbmi->segment_id = read_inter_segment_id(cm, xd, 0, r); 1532 1533 read_cdef(cm, r, xd); 1534 1535 read_delta_q_params(cm, xd, r); 1536 1537 if (!mbmi->skip_mode) 1538 inter_block = read_is_inter_block(cm, xd, mbmi->segment_id, r); 1539 1540 mbmi->current_qindex = xd->current_base_qindex; 1541 1542 xd->above_txfm_context = 1543 cm->above_contexts.txfm[xd->tile.tile_row] + xd->mi_col; 1544 xd->left_txfm_context = 1545 xd->left_txfm_context_buffer + (xd->mi_row & MAX_MIB_MASK); 1546 1547 if (inter_block) 1548 read_inter_block_mode_info(pbi, dcb, mbmi, r); 1549 else 1550 read_intra_block_mode_info(cm, xd, mbmi, r); 1551 } 1552 1553 static void intra_copy_frame_mvs(AV1_COMMON *const cm, int mi_row, int mi_col, 1554 int x_mis, int y_mis) { 1555 const int frame_mvs_stride = ROUND_POWER_OF_TWO(cm->mi_params.mi_cols, 1); 1556 MV_REF *frame_mvs = 1557 cm->cur_frame->mvs + (mi_row >> 1) * frame_mvs_stride + (mi_col >> 1); 1558 x_mis = ROUND_POWER_OF_TWO(x_mis, 1); 1559 y_mis = ROUND_POWER_OF_TWO(y_mis, 1); 1560 1561 for (int h = 0; h < y_mis; h++) { 1562 MV_REF *mv = frame_mvs; 1563 for (int w = 0; w < x_mis; w++) { 1564 mv->ref_frame = NONE_FRAME; 1565 mv++; 1566 } 1567 frame_mvs += frame_mvs_stride; 1568 } 1569 } 1570 1571 void av1_read_mode_info(AV1Decoder *const pbi, DecoderCodingBlock *dcb, 1572 aom_reader *r, int x_mis, int y_mis) { 1573 AV1_COMMON *const cm = &pbi->common; 1574 MACROBLOCKD *const xd = &dcb->xd; 1575 MB_MODE_INFO *const mi = xd->mi[0]; 1576 mi->use_intrabc = 0; 1577 1578 if (frame_is_intra_only(cm)) { 1579 read_intra_frame_mode_info(cm, dcb, r); 1580 if (cm->seq_params->order_hint_info.enable_ref_frame_mvs) 1581 intra_copy_frame_mvs(cm, xd->mi_row, xd->mi_col, x_mis, y_mis); 1582 } else { 1583 read_inter_frame_mode_info(pbi, dcb, r); 1584 if (cm->seq_params->order_hint_info.enable_ref_frame_mvs) 1585 av1_copy_frame_mvs(cm, mi, xd->mi_row, xd->mi_col, x_mis, y_mis); 1586 } 1587 }