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_ENCODER_SPEED_FEATURES_H_ 13 #define AOM_AV1_ENCODER_SPEED_FEATURES_H_ 14 15 #include "av1/common/enums.h" 16 #include "av1/encoder/enc_enums.h" 17 #include "av1/encoder/mcomp.h" 18 #include "av1/encoder/encodemb.h" 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 /*! @file */ 25 26 /*!\cond */ 27 #define MAX_MESH_STEP 4 28 29 typedef struct MESH_PATTERN { 30 int range; 31 int interval; 32 } MESH_PATTERN; 33 34 enum { 35 GM_FULL_SEARCH, 36 GM_REDUCED_REF_SEARCH_SKIP_L2_L3, 37 GM_REDUCED_REF_SEARCH_SKIP_L2_L3_ARF2, 38 39 // Same as GM_REDUCED_REF_SEARCH_SKIP_L2_L3_ARF2 but with extra filtering 40 // to keep at most two ref frames 41 GM_SEARCH_CLOSEST_REFS_ONLY, 42 43 GM_DISABLE_SEARCH 44 } UENUM1BYTE(GM_SEARCH_TYPE); 45 46 enum { 47 DIST_WTD_COMP_ENABLED, 48 DIST_WTD_COMP_SKIP_MV_SEARCH, 49 DIST_WTD_COMP_DISABLED, 50 } UENUM1BYTE(DIST_WTD_COMP_FLAG); 51 52 enum { 53 INTRA_ALL = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED) | (1 << D45_PRED) | 54 (1 << D135_PRED) | (1 << D113_PRED) | (1 << D157_PRED) | 55 (1 << D203_PRED) | (1 << D67_PRED) | (1 << SMOOTH_PRED) | 56 (1 << SMOOTH_V_PRED) | (1 << SMOOTH_H_PRED) | (1 << PAETH_PRED), 57 UV_INTRA_ALL = 58 (1 << UV_DC_PRED) | (1 << UV_V_PRED) | (1 << UV_H_PRED) | 59 (1 << UV_D45_PRED) | (1 << UV_D135_PRED) | (1 << UV_D113_PRED) | 60 (1 << UV_D157_PRED) | (1 << UV_D203_PRED) | (1 << UV_D67_PRED) | 61 (1 << UV_SMOOTH_PRED) | (1 << UV_SMOOTH_V_PRED) | 62 (1 << UV_SMOOTH_H_PRED) | (1 << UV_PAETH_PRED) | (1 << UV_CFL_PRED), 63 UV_INTRA_DC = (1 << UV_DC_PRED), 64 UV_INTRA_DC_CFL = (1 << UV_DC_PRED) | (1 << UV_CFL_PRED), 65 UV_INTRA_DC_TM = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED), 66 UV_INTRA_DC_PAETH_CFL = 67 (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | (1 << UV_CFL_PRED), 68 UV_INTRA_DC_H_V = (1 << UV_DC_PRED) | (1 << UV_V_PRED) | (1 << UV_H_PRED), 69 UV_INTRA_DC_H_V_CFL = (1 << UV_DC_PRED) | (1 << UV_V_PRED) | 70 (1 << UV_H_PRED) | (1 << UV_CFL_PRED), 71 UV_INTRA_DC_PAETH_H_V = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | 72 (1 << UV_V_PRED) | (1 << UV_H_PRED), 73 UV_INTRA_DC_PAETH_H_V_CFL = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | 74 (1 << UV_V_PRED) | (1 << UV_H_PRED) | 75 (1 << UV_CFL_PRED), 76 INTRA_DC = (1 << DC_PRED), 77 INTRA_DC_TM = (1 << DC_PRED) | (1 << PAETH_PRED), 78 INTRA_DC_H_V = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED), 79 INTRA_DC_H_V_SMOOTH = 80 (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED) | (1 << SMOOTH_PRED), 81 INTRA_DC_PAETH_H_V = 82 (1 << DC_PRED) | (1 << PAETH_PRED) | (1 << V_PRED) | (1 << H_PRED) 83 }; 84 85 enum { 86 INTER_ALL = (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | 87 (1 << NEWMV) | (1 << NEAREST_NEARESTMV) | (1 << NEAR_NEARMV) | 88 (1 << NEW_NEWMV) | (1 << NEAREST_NEWMV) | (1 << NEAR_NEWMV) | 89 (1 << NEW_NEARMV) | (1 << NEW_NEARESTMV) | (1 << GLOBAL_GLOBALMV), 90 INTER_NEAREST_NEAR_ZERO = (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | 91 (1 << NEAREST_NEARESTMV) | (1 << GLOBAL_GLOBALMV) | 92 (1 << NEAREST_NEWMV) | (1 << NEW_NEARESTMV) | 93 (1 << NEW_NEARMV) | (1 << NEAR_NEWMV) | 94 (1 << NEAR_NEARMV), 95 INTER_SINGLE_ALL = 96 (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | (1 << NEWMV), 97 }; 98 99 enum { 100 DISABLE_ALL_INTER_SPLIT = (1 << THR_COMP_GA) | (1 << THR_COMP_LA) | 101 (1 << THR_ALTR) | (1 << THR_GOLD) | (1 << THR_LAST), 102 103 DISABLE_ALL_SPLIT = (1 << THR_INTRA) | DISABLE_ALL_INTER_SPLIT, 104 105 DISABLE_COMPOUND_SPLIT = (1 << THR_COMP_GA) | (1 << THR_COMP_LA), 106 107 LAST_AND_INTRA_SPLIT_ONLY = (1 << THR_COMP_GA) | (1 << THR_COMP_LA) | 108 (1 << THR_ALTR) | (1 << THR_GOLD) 109 }; 110 111 enum { 112 TXFM_CODING_SF = 1, 113 INTER_PRED_SF = 2, 114 INTRA_PRED_SF = 4, 115 PARTITION_SF = 8, 116 LOOP_FILTER_SF = 16, 117 RD_SKIP_SF = 32, 118 RESERVE_2_SF = 64, 119 RESERVE_3_SF = 128, 120 } UENUM1BYTE(DEV_SPEED_FEATURES); 121 122 /* This enumeration defines when the rate control recode loop will be 123 * enabled. 124 */ 125 enum { 126 /* 127 * No recodes allowed 128 */ 129 DISALLOW_RECODE = 0, 130 /* 131 * Allow recode only for KF/ARF/GF frames 132 */ 133 ALLOW_RECODE_KFARFGF = 1, 134 /* 135 * Allow recode for all frame types based on bitrate constraints. 136 */ 137 ALLOW_RECODE = 2, 138 } UENUM1BYTE(RECODE_LOOP_TYPE); 139 140 enum { 141 SUBPEL_TREE = 0, 142 SUBPEL_TREE_PRUNED = 1, // Prunes 1/2-pel searches 143 SUBPEL_TREE_PRUNED_MORE = 2, // Prunes 1/2-pel searches more aggressively 144 SUBPEL_SEARCH_METHODS 145 } UENUM1BYTE(SUBPEL_SEARCH_METHOD); 146 147 enum { 148 // Try the full image with different values. 149 LPF_PICK_FROM_FULL_IMAGE, 150 // Try the full image filter search with non-dual filter only. 151 LPF_PICK_FROM_FULL_IMAGE_NON_DUAL, 152 // Try a small portion of the image with different values. 153 LPF_PICK_FROM_SUBIMAGE, 154 // Estimate the level based on quantizer and frame type 155 LPF_PICK_FROM_Q, 156 // Pick 0 to disable LPF if LPF was enabled last frame 157 LPF_PICK_MINIMAL_LPF 158 } UENUM1BYTE(LPF_PICK_METHOD); 159 /*!\endcond */ 160 161 /*!\enum CDEF_PICK_METHOD 162 * \brief This enumeration defines a variety of CDEF pick methods 163 */ 164 typedef enum { 165 CDEF_FULL_SEARCH, /**< Full search */ 166 CDEF_FAST_SEARCH_LVL1, /**< Search among a subset of all possible filters. */ 167 CDEF_FAST_SEARCH_LVL2, /**< Search reduced subset of filters than Level 1. */ 168 CDEF_FAST_SEARCH_LVL3, /**< Search reduced subset of secondary filters than 169 Level 2. */ 170 CDEF_FAST_SEARCH_LVL4, /**< Search reduced subset of filters than Level 3. */ 171 CDEF_FAST_SEARCH_LVL5, /**< Search reduced subset of filters than Level 4. */ 172 CDEF_PICK_FROM_Q, /**< Estimate filter strength based on quantizer. */ 173 CDEF_PICK_METHODS 174 } CDEF_PICK_METHOD; 175 176 /*!\cond */ 177 enum { 178 // Terminate search early based on distortion so far compared to 179 // qp step, distortion in the neighborhood of the frame, etc. 180 FLAG_EARLY_TERMINATE = 1 << 0, 181 182 // Skips comp inter modes if the best so far is an intra mode. 183 FLAG_SKIP_COMP_BESTINTRA = 1 << 1, 184 185 // Skips oblique intra modes if the best so far is an inter mode. 186 FLAG_SKIP_INTRA_BESTINTER = 1 << 3, 187 188 // Skips oblique intra modes at angles 27, 63, 117, 153 if the best 189 // intra so far is not one of the neighboring directions. 190 FLAG_SKIP_INTRA_DIRMISMATCH = 1 << 4, 191 192 // Skips intra modes other than DC_PRED if the source variance is small 193 FLAG_SKIP_INTRA_LOWVAR = 1 << 5, 194 } UENUM1BYTE(MODE_SEARCH_SKIP_LOGIC); 195 196 enum { 197 // No tx type pruning 198 TX_TYPE_PRUNE_0 = 0, 199 // adaptively prunes the least perspective tx types out of all 16 200 // (tuned to provide negligible quality loss) 201 TX_TYPE_PRUNE_1 = 1, 202 // similar, but applies much more aggressive pruning to get better speed-up 203 TX_TYPE_PRUNE_2 = 2, 204 TX_TYPE_PRUNE_3 = 3, 205 // More aggressive pruning based on tx type score and allowed tx count 206 TX_TYPE_PRUNE_4 = 4, 207 TX_TYPE_PRUNE_5 = 5, 208 } UENUM1BYTE(TX_TYPE_PRUNE_MODE); 209 210 enum { 211 // No reaction to rate control on a detected slide/scene change. 212 NO_DETECTION = 0, 213 214 // Set to larger Q based only on the detected slide/scene change and 215 // current/past Q. 216 FAST_DETECTION_MAXQ = 1, 217 } UENUM1BYTE(OVERSHOOT_DETECTION_CBR); 218 219 enum { 220 // Turns off multi-winner mode. So we will do txfm search on either all modes 221 // if winner mode is off, or we will only on txfm search on a single winner 222 // mode. 223 MULTI_WINNER_MODE_OFF = 0, 224 225 // Limits the number of winner modes to at most 2 226 MULTI_WINNER_MODE_FAST = 1, 227 228 // Uses the default number of winner modes, which is 3 for intra mode, and 1 229 // for inter mode. 230 MULTI_WINNER_MODE_DEFAULT = 2, 231 232 // Maximum number of winner modes allowed. 233 MULTI_WINNER_MODE_LEVELS, 234 } UENUM1BYTE(MULTI_WINNER_MODE_TYPE); 235 236 enum { 237 PRUNE_NEARMV_OFF = 0, // Turn off nearmv pruning 238 PRUNE_NEARMV_LEVEL1 = 1, // Prune nearmv for qindex (0-85) 239 PRUNE_NEARMV_LEVEL2 = 2, // Prune nearmv for qindex (0-170) 240 PRUNE_NEARMV_LEVEL3 = 3, // Prune nearmv more aggressively for qindex (0-170) 241 PRUNE_NEARMV_MAX = PRUNE_NEARMV_LEVEL3, 242 } UENUM1BYTE(PRUNE_NEARMV_LEVEL); 243 244 enum { 245 // Default transform search used in evaluation of best inter candidates 246 // (MODE_EVAL stage) and motion mode winner processing (WINNER_MODE_EVAL 247 // stage). 248 TX_SEARCH_DEFAULT = 0, 249 // Transform search in motion mode rd during MODE_EVAL stage. 250 TX_SEARCH_MOTION_MODE, 251 // Transform search in compound type mode rd during MODE_EVAL stage. 252 TX_SEARCH_COMP_TYPE_MODE, 253 // All transform search cases 254 TX_SEARCH_CASES 255 } UENUM1BYTE(TX_SEARCH_CASE); 256 257 typedef struct { 258 TX_TYPE_PRUNE_MODE prune_2d_txfm_mode; 259 int fast_intra_tx_type_search; 260 261 // INT_MAX: Disable fast search. 262 // 1 - 1024: Probability threshold used for conditionally forcing tx type, 263 // during mode search. 264 // 0: Force tx type to be DCT_DCT unconditionally, during 265 // mode search. 266 int fast_inter_tx_type_prob_thresh; 267 268 // Prune less likely chosen transforms for each intra mode. The speed 269 // feature ranges from 0 to 2, for different speed / compression trade offs. 270 int use_reduced_intra_txset; 271 272 // Use a skip flag prediction model to detect blocks with skip = 1 early 273 // and avoid doing full TX type search for such blocks. 274 int use_skip_flag_prediction; 275 276 // Threshold used by the ML based method to predict TX block split decisions. 277 int ml_tx_split_thresh; 278 279 // skip remaining transform type search when we found the rdcost of skip is 280 // better than applying transform 281 int skip_tx_search; 282 283 // Prune tx type search using previous frame stats. 284 int prune_tx_type_using_stats; 285 // Prune tx type search using estimated RDcost 286 int prune_tx_type_est_rd; 287 288 // Flag used to control the winner mode processing for tx type pruning for 289 // inter blocks. It enables further tx type mode pruning based on ML model for 290 // mode evaluation and disables tx type mode pruning for winner mode 291 // processing. 292 int winner_mode_tx_type_pruning; 293 } TX_TYPE_SEARCH; 294 295 enum { 296 // Search partitions using RD criterion 297 SEARCH_PARTITION, 298 299 // Always use a fixed size partition 300 FIXED_PARTITION, 301 302 // Partition using source variance 303 VAR_BASED_PARTITION, 304 305 #if CONFIG_RT_ML_PARTITIONING 306 // Partition using ML model 307 ML_BASED_PARTITION 308 #endif 309 } UENUM1BYTE(PARTITION_SEARCH_TYPE); 310 311 enum { 312 NOT_IN_USE, 313 DIRECT_PRED, 314 RELAXED_PRED, 315 ADAPT_PRED 316 } UENUM1BYTE(MAX_PART_PRED_MODE); 317 318 enum { 319 LAST_MV_DATA, 320 CURRENT_Q, 321 QTR_ONLY, 322 } UENUM1BYTE(MV_PREC_LOGIC); 323 324 enum { 325 SUPERRES_AUTO_ALL, // Tries all possible superres ratios 326 SUPERRES_AUTO_DUAL, // Tries no superres and q-based superres ratios 327 SUPERRES_AUTO_SOLO, // Only apply the q-based superres ratio 328 } UENUM1BYTE(SUPERRES_AUTO_SEARCH_TYPE); 329 /*!\endcond */ 330 331 /*!\enum INTERNAL_COST_UPDATE_TYPE 332 * \brief This enum decides internally how often to update the entropy costs 333 * 334 * INTERNAL_COST_UPD_TYPE is similar to \ref COST_UPDATE_TYPE but has slightly 335 * more flexibility in update frequency. This enum is separate from \ref 336 * COST_UPDATE_TYPE because although \ref COST_UPDATE_TYPE is not exposed, its 337 * values are public so it cannot be modified without breaking public API. 338 * Due to the use of AOMMIN() in populate_unified_cost_update_freq() to 339 * compute the unified cost update frequencies (out of COST_UPDATE_TYPE and 340 * INTERNAL_COST_UPDATE_TYPE), the values of this enum type must be listed in 341 * the order of increasing frequencies. 342 * 343 * \warning In case of any updates/modifications to the enum COST_UPDATE_TYPE, 344 * update the enum INTERNAL_COST_UPDATE_TYPE as well. 345 */ 346 typedef enum { 347 INTERNAL_COST_UPD_OFF, /*!< Turn off cost updates. */ 348 INTERNAL_COST_UPD_TILE, /*!< Update every tile. */ 349 INTERNAL_COST_UPD_SBROW_SET, /*!< Update every row_set of height 256 pixs. */ 350 INTERNAL_COST_UPD_SBROW, /*!< Update every sb rows inside a tile. */ 351 INTERNAL_COST_UPD_SB, /*!< Update every sb. */ 352 } INTERNAL_COST_UPDATE_TYPE; 353 354 /*!\enum SIMPLE_MOTION_SEARCH_PRUNE_LEVEL 355 * \brief This enumeration defines a variety of simple motion search based 356 * partition prune levels 357 */ 358 typedef enum { 359 NO_PRUNING = -1, 360 SIMPLE_AGG_LVL0, /*!< Simple prune aggressiveness level 0. */ 361 SIMPLE_AGG_LVL1, /*!< Simple prune aggressiveness level 1. */ 362 SIMPLE_AGG_LVL2, /*!< Simple prune aggressiveness level 2. */ 363 SIMPLE_AGG_LVL3, /*!< Simple prune aggressiveness level 3. */ 364 QIDX_BASED_AGG_LVL1, /*!< Qindex based prune aggressiveness level, aggressive 365 level maps to simple agg level 1 or 2 based on qindex. 366 */ 367 TOTAL_SIMPLE_AGG_LVLS = QIDX_BASED_AGG_LVL1, /*!< Total number of simple prune 368 aggressiveness levels. */ 369 TOTAL_QINDEX_BASED_AGG_LVLS = 370 QIDX_BASED_AGG_LVL1 - 371 SIMPLE_AGG_LVL3, /*!< Total number of qindex based simple prune 372 aggressiveness levels. */ 373 TOTAL_AGG_LVLS = TOTAL_SIMPLE_AGG_LVLS + 374 TOTAL_QINDEX_BASED_AGG_LVLS, /*!< Total number of levels. */ 375 } SIMPLE_MOTION_SEARCH_PRUNE_LEVEL; 376 377 /*!\enum PRUNE_MESH_SEARCH_LEVEL 378 * \brief This enumeration defines a variety of mesh search prune levels. 379 */ 380 typedef enum { 381 PRUNE_MESH_SEARCH_DISABLED = 0, /*!< Prune mesh search level 0. */ 382 PRUNE_MESH_SEARCH_LVL_1 = 1, /*!< Prune mesh search level 1. */ 383 PRUNE_MESH_SEARCH_LVL_2 = 2, /*!< Prune mesh search level 2. */ 384 } PRUNE_MESH_SEARCH_LEVEL; 385 386 /*!\enum INTER_SEARCH_EARLY_TERM_IDX 387 * \brief This enumeration defines inter search early termination index in 388 * non-rd path based on sse value. 389 */ 390 typedef enum { 391 EARLY_TERM_DISABLED = 392 0, /*!< Early terminate inter mode search based on sse disabled. */ 393 EARLY_TERM_IDX_1 = 394 1, /*!< Early terminate inter mode search based on sse, index 1. */ 395 EARLY_TERM_IDX_2 = 396 2, /*!< Early terminate inter mode search based on sse, index 2. */ 397 EARLY_TERM_IDX_3 = 398 3, /*!< Early terminate inter mode search based on sse, index 3. */ 399 EARLY_TERM_IDX_4 = 400 4, /*!< Early terminate inter mode search based on sse, index 4. */ 401 EARLY_TERM_INDICES, /*!< Total number of early terminate indices */ 402 } INTER_SEARCH_EARLY_TERM_IDX; 403 404 /*! 405 * \brief Sequence/frame level speed vs quality features 406 */ 407 typedef struct HIGH_LEVEL_SPEED_FEATURES { 408 /*! Frame level coding parameter update. */ 409 int frame_parameter_update; 410 411 /*! 412 * Cases and frame types for which the recode loop is enabled. 413 */ 414 RECODE_LOOP_TYPE recode_loop; 415 416 /*! 417 * Controls the tolerance vs target rate used in deciding whether to 418 * recode a frame. It has no meaning if recode is disabled. 419 */ 420 int recode_tolerance; 421 422 /*! 423 * Determine how motion vector precision is chosen. The possibilities are: 424 * LAST_MV_DATA: use the mv data from the last coded frame 425 * CURRENT_Q: use the current q as a threshold 426 * QTR_ONLY: use quarter pel precision only. 427 */ 428 MV_PREC_LOGIC high_precision_mv_usage; 429 430 /*! 431 * Always set to 0. If on it enables 0 cost background transmission 432 * (except for the initial transmission of the segmentation). The feature is 433 * disabled because the addition of very large block sizes make the 434 * backgrounds very to cheap to encode, and the segmentation we have 435 * adds overhead. 436 */ 437 int static_segmentation; 438 439 /*! 440 * Superres-auto mode search type: 441 */ 442 SUPERRES_AUTO_SEARCH_TYPE superres_auto_search_type; 443 444 /*! 445 * Enable/disable extra screen content test by encoding key frame twice. 446 */ 447 int disable_extra_sc_testing; 448 449 /*! 450 * Enable/disable second_alt_ref temporal filtering. 451 */ 452 int second_alt_ref_filtering; 453 454 /*! 455 * The number of frames to be used during temporal filtering of an ARF frame 456 * is adjusted based on noise level of the current frame. The sf has three 457 * levels to decide number of frames to be considered for filtering: 458 * 0 : Use default number of frames 459 * 1 and 2 : Reduce the number of frames based on noise level with varied 460 * aggressiveness 461 */ 462 int adjust_num_frames_for_arf_filtering; 463 464 /*! 465 * Decide the bit estimation approach used in qindex decision. 466 * 0: estimate bits based on a constant value; 467 * 1: estimate bits more accurately based on the frame complexity. 468 */ 469 int accurate_bit_estimate; 470 471 /*! 472 * Decide the approach for weight calculation during temporal filtering. 473 * 0: Calculate weight using exp() 474 * 1: Calculate weight using a lookup table that approximates exp(). 475 */ 476 int weight_calc_level_in_tf; 477 478 /*! 479 * Decide whether to perform motion estimation at split block (i.e. 16x16) 480 * level or not. 481 * 0: Always allow motion estimation. 482 * 1: Conditionally allow motion estimation based on 4x4 sub-blocks variance. 483 */ 484 int allow_sub_blk_me_in_tf; 485 } HIGH_LEVEL_SPEED_FEATURES; 486 487 /*! 488 * Speed features for the first pass. 489 */ 490 typedef struct FIRST_PASS_SPEED_FEATURES { 491 /*! 492 * \brief Reduces the mv search window. 493 * By default, the initial search window is around 494 * MIN(MIN(dims), MAX_FULL_PEL_VAL) = MIN(MIN(dims), 1023). 495 * Each step reduction decrease the window size by about a factor of 2. 496 */ 497 int reduce_mv_step_param; 498 499 /*! 500 * \brief Skips the motion search when the zero mv has small sse. 501 */ 502 int skip_motion_search_threshold; 503 504 /*! 505 * \brief Skips reconstruction by using source buffers for prediction 506 */ 507 int disable_recon; 508 509 /*! 510 * \brief Skips the motion search centered on 0,0 mv. 511 */ 512 int skip_zeromv_motion_search; 513 } FIRST_PASS_SPEED_FEATURES; 514 515 /*!\cond */ 516 typedef struct TPL_SPEED_FEATURES { 517 // GOP length adaptive decision. 518 // If set to 0, tpl model decides whether a shorter gf interval is better. 519 // If set to 1, tpl stats of ARFs from base layer, (base+1) layer and 520 // (base+2) layer decide whether a shorter gf interval is better. 521 // If set to 2, tpl stats of ARFs from base layer, (base+1) layer and GF boost 522 // decide whether a shorter gf interval is better. 523 // If set to 3, gop length adaptive decision is disabled. 524 int gop_length_decision_method; 525 // Prune the intra modes search by tpl. 526 // If set to 0, we will search all intra modes from DC_PRED to PAETH_PRED. 527 // If set to 1, we only search DC_PRED, V_PRED, and H_PRED. 528 int prune_intra_modes; 529 // This parameter controls which step in the n-step process we start at. 530 int reduce_first_step_size; 531 // Skip motion estimation based on the precision of center MVs and the 532 // difference between center MVs. 533 // If set to 0, motion estimation is skipped for duplicate center MVs 534 // (default). If set to 1, motion estimation is skipped for duplicate 535 // full-pixel center MVs. If set to 2, motion estimation is skipped if the 536 // difference between center MVs is less than the threshold. 537 int skip_alike_starting_mv; 538 539 // When to stop subpel search. 540 SUBPEL_FORCE_STOP subpel_force_stop; 541 542 // Which search method to use. 543 SEARCH_METHODS search_method; 544 545 // Prune starting mvs in TPL based on sad scores. 546 int prune_starting_mv; 547 548 // Prune reference frames in TPL. 549 int prune_ref_frames_in_tpl; 550 551 // Support compound predictions. 552 int allow_compound_pred; 553 554 // Calculate rate and distortion based on Y plane only. 555 int use_y_only_rate_distortion; 556 557 // Use SAD instead of SATD during intra/inter mode search. 558 // If set to 0, use SATD always. 559 // If set to 1, use SAD during intra/inter mode search for frames in the 560 // higher temporal layers of the hierarchical prediction structure. 561 // If set to 2, use SAD during intra/inter mode search for all frames. 562 // This sf is disabled for the first GF group of the key-frame interval, 563 // i.e., SATD is used during intra/inter mode search of the first GF group. 564 int use_sad_for_mode_decision; 565 566 // Skip tpl processing for frames of type LF_UPDATE. 567 // This sf is disabled for the first GF group of the key-frame interval. 568 int reduce_num_frames; 569 } TPL_SPEED_FEATURES; 570 571 typedef struct GLOBAL_MOTION_SPEED_FEATURES { 572 GM_SEARCH_TYPE gm_search_type; 573 574 // During global motion estimation, prune remaining reference frames in a 575 // given direction(past/future), if the evaluated ref_frame in that direction 576 // yields gm_type as INVALID/TRANSLATION/IDENTITY 577 int prune_ref_frame_for_gm_search; 578 579 // When the current GM type is set to ZEROMV, prune ZEROMV if its performance 580 // is worse than NEWMV under SSE metric. 581 // 0 : no pruning 582 // 1 : conservative pruning 583 // 2 : aggressive pruning 584 int prune_zero_mv_with_sse; 585 586 // Disable global motion estimation based on stats of previous frames in the 587 // GF group 588 int disable_gm_search_based_on_stats; 589 590 // Downsampling pyramid level to use for global motion estimation 591 int downsample_level; 592 593 // Number of refinement steps to apply after initial model generation 594 int num_refinement_steps; 595 } GLOBAL_MOTION_SPEED_FEATURES; 596 597 typedef struct PARTITION_SPEED_FEATURES { 598 PARTITION_SEARCH_TYPE partition_search_type; 599 600 // Used if partition_search_type = FIXED_PARTITION 601 BLOCK_SIZE fixed_partition_size; 602 603 // Prune extended partition types search based on the current best partition 604 // and the combined rdcost of the subblocks estimated from previous 605 // partitions. Can take values 0 - 2, 0 referring to no pruning, and 1 - 2 606 // increasing aggressiveness of pruning in order. 607 int prune_ext_partition_types_search_level; 608 609 // Prune part4 based on block size 610 int prune_part4_search; 611 612 // Use a ML model to prune rectangular, ab and 4-way horz 613 // and vert partitions 614 int ml_prune_partition; 615 616 // Use a ML model to adaptively terminate partition search after trying 617 // PARTITION_SPLIT. Can take values 0 - 2, 0 meaning not being enabled, and 618 // 1 - 2 increasing aggressiveness in order. 619 int ml_early_term_after_part_split_level; 620 621 // Skip rectangular partition test when partition type none gives better 622 // rd than partition type split. Can take values 0 - 2, 0 referring to no 623 // skipping, and 1 - 2 increasing aggressiveness of skipping in order. 624 int less_rectangular_check_level; 625 626 // Use square partition only beyond this block size. 627 BLOCK_SIZE use_square_partition_only_threshold; 628 629 // Sets max square partition levels for this superblock based on 630 // motion vector and prediction error distribution produced from 16x16 631 // simple motion search 632 MAX_PART_PRED_MODE auto_max_partition_based_on_simple_motion; 633 634 // Min and max square partition size we enable (block_size) as per auto 635 // min max, but also used by adjust partitioning, and pick_partitioning. 636 BLOCK_SIZE default_min_partition_size; 637 BLOCK_SIZE default_max_partition_size; 638 639 // Sets level of adjustment of variance-based partitioning during 640 // rd_use_partition 0 - no partition adjustment, 1 - try to merge partitions 641 // for small blocks and high QP, 2 - try to merge partitions, 3 - try to merge 642 // and split leaf partitions and 0 - 3 decreasing aggressiveness in order. 643 int adjust_var_based_rd_partitioning; 644 645 // Partition search early breakout thresholds. 646 int64_t partition_search_breakout_dist_thr; 647 int partition_search_breakout_rate_thr; 648 649 // Thresholds for ML based partition search breakout. 650 int ml_partition_search_breakout_thresh[PARTITION_BLOCK_SIZES]; 651 652 // Aggressiveness levels for pruning split and rectangular partitions based on 653 // simple_motion_search. SIMPLE_AGG_LVL0 to SIMPLE_AGG_LVL3 correspond to 654 // simple motion search based pruning. QIDX_BASED_AGG_LVL1 corresponds to 655 // qindex based and simple motion search based pruning. 656 int simple_motion_search_prune_agg; 657 658 // Perform simple_motion_search on each possible subblock and use it to prune 659 // PARTITION_HORZ and PARTITION_VERT. 660 int simple_motion_search_prune_rect; 661 662 // Perform simple motion search before none_partition to decide if we 663 // want to remove all partitions other than PARTITION_SPLIT. If set to 0, this 664 // model is disabled. If set to 1, the model attempts to perform 665 // PARTITION_SPLIT only. If set to 2, the model also attempts to prune 666 // PARTITION_SPLIT. 667 int simple_motion_search_split; 668 669 // Use features from simple_motion_search to terminate prediction block 670 // partition after PARTITION_NONE 671 int simple_motion_search_early_term_none; 672 673 // Controls whether to reduce the number of motion search steps. If this is 0, 674 // then simple_motion_search has the same number of steps as 675 // single_motion_search (assuming no other speed features). Otherwise, reduce 676 // the number of steps by the value contained in this variable. 677 int simple_motion_search_reduce_search_steps; 678 679 // This variable controls the maximum block size where intra blocks can be 680 // used in inter frames. 681 // TODO(aconverse): Fold this into one of the other many mode skips 682 BLOCK_SIZE max_intra_bsize; 683 684 // Use CNN with luma pixels on source frame on each of the 64x64 subblock to 685 // perform partition pruning in intra frames. 686 // 0: No Pruning 687 // 1: Prune split and rectangular partitions only 688 // 2: Prune none, split and rectangular partitions 689 int intra_cnn_based_part_prune_level; 690 691 // Disable extended partition search if the current bsize is greater than the 692 // threshold. Must be a square block size BLOCK_8X8 or higher. 693 BLOCK_SIZE ext_partition_eval_thresh; 694 695 // Use best partition decision so far to tune 'ext_partition_eval_thresh' 696 int ext_part_eval_based_on_cur_best; 697 698 // Disable rectangular partitions for larger block sizes. 699 int rect_partition_eval_thresh; 700 701 // Prune extended partition search based on whether the split/rect partitions 702 // provided an improvement in the previous search. 703 // 0 : no pruning 704 // 1 : prune 1:4 partition search using winner info from split partitions 705 // 2 : prune 1:4 and AB partition search using split and HORZ/VERT info 706 int prune_ext_part_using_split_info; 707 708 // Prunt rectangular, AB and 4-way partition based on q index and block size 709 // 0 : no pruning 710 // 1 : prune sub_8x8 at very low quantizers 711 // 2 : prune all block size based on qindex 712 int prune_rectangular_split_based_on_qidx; 713 714 // Prune rectangular partitions based on 4x4 sub-block variance 715 // false : no pruning 716 // true : prune rectangular partitions based on 4x4 sub-block variance 717 // deviation 718 // 719 // For allintra encode, this speed feature reduces instruction count by 6.4% 720 // for speed=6 with coding performance change less than 0.24%. For AVIF image 721 // encode, this speed feature reduces encode time by 8.14% for speed 6 on a 722 // typical image dataset with coding performance change less than 0.16%. This 723 // speed feature is not applicable to speed >= 7. 724 bool prune_rect_part_using_4x4_var_deviation; 725 726 // Prune rectangular partitions based on prediction mode chosen by NONE 727 // partition. 728 // false : no pruning 729 // true : prunes rectangular partition as described below 730 // If prediction mode chosen by NONE partition is 731 // DC_PRED or SMOOTH_PRED: Prunes both horizontal and vertical partitions if 732 // at least one of the left and top neighbor blocks is larger than the 733 // current block. 734 // Directional Mode: Prunes either of the horizontal and vertical partition 735 // based on center angle of the prediction mode chosen by NONE partition. For 736 // example, vertical partition is pruned if center angle of the prediction 737 // mode chosen by NONE partition is close to 180 degrees (i.e. horizontal 738 // direction) and vice versa. 739 // For allintra encode, this speed feature reduces instruction count by 5.1% 740 // for speed=6 with coding performance change less than 0.22%. For AVIF image 741 // encode, this speed feature reduces encode time by 4.44% for speed 6 on a 742 // typical image dataset with coding performance change less than 0.15%. 743 // For speed >= 7, variance-based logic is used to determine the partition 744 // structure instead of recursive partition search. Therefore, this speed 745 // feature is not applicable in such cases. 746 bool prune_rect_part_using_none_pred_mode; 747 748 // Terminate partition search for child partition, 749 // when NONE and SPLIT partition rd_costs are INT64_MAX. 750 int early_term_after_none_split; 751 752 // Level used to adjust threshold for av1_ml_predict_breakout(). At lower 753 // levels, more conservative threshold is used, and value of 0 indicates 754 // av1_ml_predict_breakout() is disabled. Value of 3 corresponds to default 755 // case with no adjustment to lbd thresholds. 756 int ml_predict_breakout_level; 757 758 // Prune sub_8x8 (BLOCK_4X4, BLOCK_4X8 and BLOCK_8X4) partitions. 759 // 0 : no pruning 760 // 1 : pruning based on neighbour block information 761 // 2 : prune always 762 int prune_sub_8x8_partition_level; 763 764 // Prune rectangular split based on simple motion search split/no_split score. 765 // 0: disable pruning, 1: enable pruning 766 int simple_motion_search_rect_split; 767 768 // The current encoder adopts a DFS search for block partitions. 769 // Therefore the mode selection and associated rdcost is ready for smaller 770 // blocks before the mode selection for some partition types. 771 // AB partition could use previous rd information and skip mode search. 772 // An example is: 773 // 774 // current block 775 // +---+---+ 776 // | | 777 // + + 778 // | | 779 // +-------+ 780 // 781 // SPLIT partition has been searched first before trying HORZ_A 782 // +---+---+ 783 // | R | R | 784 // +---+---+ 785 // | R | R | 786 // +---+---+ 787 // 788 // HORZ_A 789 // +---+---+ 790 // | | | 791 // +---+---+ 792 // | | 793 // +-------+ 794 // 795 // With this speed feature, the top two sub blocks can directly use rdcost 796 // searched in split partition, and the mode info is also copied from 797 // saved info. Similarly, the bottom rectangular block can also use 798 // the available information from previous rectangular search. 799 int reuse_prev_rd_results_for_part_ab; 800 801 // Reuse the best prediction modes found in PARTITION_SPLIT and PARTITION_RECT 802 // when encoding PARTITION_AB. 803 int reuse_best_prediction_for_part_ab; 804 805 // The current partition search records the best rdcost so far and uses it 806 // in mode search and transform search to early skip when some criteria is 807 // met. For example, when the current rdcost is larger than the best rdcost, 808 // or the model rdcost is larger than the best rdcost times some thresholds. 809 // By default, this feature is turned on to speed up the encoder partition 810 // search. 811 // If disabling it, at speed 0, 30 frames, we could get 812 // about -0.25% quality gain (psnr, ssim, vmaf), with about 13% slowdown. 813 int use_best_rd_for_pruning; 814 815 // Skip evaluation of non-square partitions based on the corresponding NONE 816 // partition. 817 // 0: no pruning 818 // 1: prune extended partitions if NONE is skippable 819 // 2: on top of 1, prune rectangular partitions if NONE is inter, not a newmv 820 // mode and skippable 821 int skip_non_sq_part_based_on_none; 822 823 // Disables 8x8 and below partitions for low quantizers. 824 int disable_8x8_part_based_on_qidx; 825 } PARTITION_SPEED_FEATURES; 826 827 typedef struct MV_SPEED_FEATURES { 828 // Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc). 829 SEARCH_METHODS search_method; 830 831 // Enable the use of faster, less accurate mv search method 832 // 0: disable, 1: if bsize >= BLOCK_32X32, 2: based on bsize, SAD and qp 833 // TODO([email protected]): Take the clip's resolution and mv activity into 834 // account. 835 int use_bsize_dependent_search_method; 836 837 // If this is set to 1, we limit the motion search range to 2 times the 838 // largest motion vector found in the last frame. 839 int auto_mv_step_size; 840 841 // Subpel_search_method can only be subpel_tree which does a subpixel 842 // logarithmic search that keeps stepping at 1/2 pixel units until 843 // you stop getting a gain, and then goes on to 1/4 and repeats 844 // the same process. Along the way it skips many diagonals. 845 SUBPEL_SEARCH_METHOD subpel_search_method; 846 847 // Maximum number of steps in logarithmic subpel search before giving up. 848 int subpel_iters_per_step; 849 850 // When to stop subpel search. 851 SUBPEL_FORCE_STOP subpel_force_stop; 852 853 // When to stop subpel search in simple motion search. 854 SUBPEL_FORCE_STOP simple_motion_subpel_force_stop; 855 856 // If true, sub-pixel search uses the exact convolve function used for final 857 // encoding and decoding; otherwise, it uses bilinear interpolation. 858 SUBPEL_SEARCH_TYPE use_accurate_subpel_search; 859 860 // Threshold for allowing exhaustive motion search. 861 int exhaustive_searches_thresh; 862 863 // Pattern to be used for any exhaustive mesh searches (except intraBC ME). 864 MESH_PATTERN mesh_patterns[MAX_MESH_STEP]; 865 866 // Pattern to be used for exhaustive mesh searches of intraBC ME. 867 MESH_PATTERN intrabc_mesh_patterns[MAX_MESH_STEP]; 868 869 // Reduce single motion search range based on MV result of prior ref_mv_idx. 870 int reduce_search_range; 871 872 // Prune mesh search. 873 PRUNE_MESH_SEARCH_LEVEL prune_mesh_search; 874 875 // Use the rd cost around the best FULLPEL_MV to speed up subpel search 876 int use_fullpel_costlist; 877 878 // Set the full pixel search level of obmc 879 // 0: obmc_full_pixel_diamond 880 // 1: obmc_refining_search_sad (faster) 881 int obmc_full_pixel_search_level; 882 883 // Accurate full pixel motion search based on TPL stats. 884 int full_pixel_search_level; 885 886 // Allow intrabc motion search 887 int use_intrabc; 888 889 // Whether to downsample the rows in sad calculation during motion search. 890 // This is only active when there are at least 16 rows. When this sf is 891 // active, if there is a large discrepancy in the SAD values for the final 892 // motion vector between skipping vs not skipping, motion search is redone 893 // with skip row features off. 894 // 0: Disabled (do not downsample rows) 895 // 1: Skip SAD calculation of odd rows if the SAD deviation of the even and 896 // odd rows for the starting MV is small. Redo motion search with sf off 897 // when SAD deviation is high for the final motion vector. 898 // 2: Skip SAD calculation of odd rows. SAD deviation is not tested for the 899 // start MV and tested only for the final MV. 900 int use_downsampled_sad; 901 902 // Enable/disable extensive joint motion search. 903 int disable_extensive_joint_motion_search; 904 905 // Enable second best mv check in joint mv search. 906 // 0: allow second MV (use rd cost as the metric) 907 // 1: use var as the metric 908 // 2: disable second MV 909 int disable_second_mv; 910 911 // Skips full pixel search based on start mv of prior ref_mv_idx. 912 // 0: Disabled 913 // 1: Skips the full pixel search upto 4 neighbor full-pel MV positions. 914 // 2: Skips the full pixel search upto 8 neighbor full-pel MV positions. 915 int skip_fullpel_search_using_startmv; 916 917 // Method to use for refining WARPED_CAUSAL motion vectors 918 // TODO(rachelbarker): Can this be unified with OBMC in some way? 919 WARP_SEARCH_METHOD warp_search_method; 920 921 // Maximum number of iterations in WARPED_CAUSAL refinement search 922 int warp_search_iters; 923 } MV_SPEED_FEATURES; 924 925 typedef struct INTER_MODE_SPEED_FEATURES { 926 // 2-pass inter mode model estimation where the preliminary pass skips 927 // transform search and uses a model to estimate rd, while the final pass 928 // computes the full transform search. Two types of models are supported: 929 // 0: not used 930 // 1: used with online dynamic rd model 931 // 2: used with static rd model 932 int inter_mode_rd_model_estimation; 933 934 // Bypass transform search based on skip rd at following stages 935 // i. Compound type mode search 936 // ii. Motion mode search (mode evaluation and winner motion mode stage) 937 // iii. Transform search for best inter candidates 938 int txfm_rd_gate_level[TX_SEARCH_CASES]; 939 940 // Limit the inter mode tested in the RD loop 941 int reduce_inter_modes; 942 943 // This variable is used to cap the maximum number of times we skip testing a 944 // mode to be evaluated. A high value means we will be faster. 945 int adaptive_rd_thresh; 946 947 // Aggressively prune inter modes when best mode is skippable. 948 int prune_inter_modes_if_skippable; 949 950 // Drop less likely to be picked reference frames in the RD search. 951 // Has seven levels for now: 0, 1, 2, 3, 4, 5 and 6 where higher levels prune 952 // more aggressively than lower ones. (0 means no pruning). 953 int selective_ref_frame; 954 955 // Prune reference frames for rectangular partitions. 956 // 0 implies no pruning 957 // 1 implies prune for extended partition 958 // 2 implies prune horiz, vert and extended partition 959 int prune_ref_frame_for_rect_partitions; 960 961 // Prune inter modes w.r.t past reference frames 962 // 0 no pruning 963 // 1 prune inter modes w.r.t ALTREF2 and ALTREF reference frames 964 // 2 prune inter modes w.r.t BWDREF, ALTREF2 and ALTREF reference frames 965 int alt_ref_search_fp; 966 967 // Prune reference frames for single prediction modes based on temporal 968 // distance and pred MV SAD. Feasible values are 0, 1, 2. The feature is 969 // disabled for 0. An increasing value indicates more aggressive pruning 970 // threshold. 971 int prune_single_ref; 972 973 // Prune compound reference frames 974 // 0 no pruning 975 // 1 prune compound references which do not satisfy the two conditions: 976 // a) The references are at a nearest distance from the current frame in 977 // both past and future direction. 978 // b) The references have minimum pred_mv_sad in both past and future 979 // direction. 980 // 2 prune compound references except the one with nearest distance from the 981 // current frame in both past and future direction. 982 int prune_comp_ref_frames; 983 984 // Skip the current ref_mv in NEW_MV mode based on mv, rate cost, etc. 985 // This speed feature equaling 0 means no skipping. 986 // If the speed feature equals 1 or 2, skip the current ref_mv in NEW_MV mode 987 // if we have already encountered ref_mv in the drl such that: 988 // 1. The other drl has the same mv during the SIMPLE_TRANSLATION search 989 // process as the current mv. 990 // 2. The rate needed to encode the current mv is larger than that for the 991 // other ref_mv. 992 // The speed feature equaling 1 means using subpel mv in the comparison. 993 // The speed feature equaling 2 means using fullpel mv in the comparison. 994 // If the speed feature >= 3, skip the current ref_mv in NEW_MV mode based on 995 // known full_mv bestsme and drl cost. 996 int skip_newmv_in_drl; 997 998 // This speed feature checks duplicate ref MVs among NEARESTMV, NEARMV, 999 // GLOBALMV and skips NEARMV or GLOBALMV (in order) if a duplicate is found 1000 // TODO(any): Instead of skipping repeated ref mv, use the recalculated 1001 // rd-cost based on mode rate and skip the mode evaluation 1002 int skip_repeated_ref_mv; 1003 1004 // Flag used to control the ref_best_rd based gating for chroma 1005 int perform_best_rd_based_gating_for_chroma; 1006 1007 // Reuse the inter_intra_mode search result from NEARESTMV mode to other 1008 // single ref modes 1009 int reuse_inter_intra_mode; 1010 1011 // prune wedge and compound segment approximate rd evaluation based on 1012 // compound average modeled rd 1013 int prune_comp_type_by_model_rd; 1014 1015 // prune wedge and compound segment approximate rd evaluation based on 1016 // compound average rd/ref_best_rd 1017 int prune_comp_type_by_comp_avg; 1018 1019 // Skip some ref frames in compound motion search by single motion search 1020 // result. Has three levels for now: 0 referring to no skipping, and 1 - 3 1021 // increasing aggressiveness of skipping in order. 1022 // Note: The search order might affect the result. It assumes that the single 1023 // reference modes are searched before compound modes. It is better to search 1024 // same single inter mode as a group. 1025 int prune_comp_search_by_single_result; 1026 1027 // Instead of performing a full MV search, do a simple translation first 1028 // and only perform a full MV search on the motion vectors that performed 1029 // well. 1030 int prune_mode_search_simple_translation; 1031 1032 // Only search compound modes with at least one "good" reference frame. 1033 // A reference frame is good if, after looking at its performance among 1034 // the single reference modes, it is one of the two best performers. 1035 int prune_compound_using_single_ref; 1036 1037 // Skip extended compound mode (NEAREST_NEWMV, NEW_NEARESTMV, NEAR_NEWMV, 1038 // NEW_NEARMV) using ref frames of above and left neighbor 1039 // blocks. 1040 // 0 : no pruning 1041 // 1 : prune ext compound modes using neighbor blocks (less aggressiveness) 1042 // 2 : prune ext compound modes using neighbor blocks (high aggressiveness) 1043 // 3 : prune ext compound modes unconditionally (highest aggressiveness) 1044 int prune_ext_comp_using_neighbors; 1045 1046 // Skip NEW_NEARMV and NEAR_NEWMV extended compound modes 1047 int skip_ext_comp_nearmv_mode; 1048 1049 // Skip extended compound mode when ref frame corresponding to NEWMV does not 1050 // have NEWMV as single mode winner. 1051 // 0 : no pruning 1052 // 1 : prune extended compound mode (less aggressiveness) 1053 // 2 : prune extended compound mode (high aggressiveness) 1054 int prune_comp_using_best_single_mode_ref; 1055 1056 // Skip NEARESTMV and NEARMV using weight computed in ref mv list population 1057 // 1058 // Pruning is enabled only when both the top and left neighbor blocks are 1059 // available and when the current block already has a valid inter prediction. 1060 int prune_nearest_near_mv_using_refmv_weight; 1061 1062 // Based on previous ref_mv_idx search result, prune the following search. 1063 int prune_ref_mv_idx_search; 1064 1065 // Disable one sided compound modes. 1066 int disable_onesided_comp; 1067 1068 // Prune obmc search using previous frame stats. 1069 // INT_MAX : disable obmc search 1070 int prune_obmc_prob_thresh; 1071 1072 // Prune warped motion search using previous frame stats. 1073 int prune_warped_prob_thresh; 1074 1075 // Variance threshold to enable/disable Interintra wedge search 1076 unsigned int disable_interintra_wedge_var_thresh; 1077 1078 // Variance threshold to enable/disable Interinter wedge search 1079 unsigned int disable_interinter_wedge_var_thresh; 1080 1081 // De-couple wedge and mode search during interintra RDO. 1082 int fast_interintra_wedge_search; 1083 1084 // Whether fast wedge sign estimate is used 1085 int fast_wedge_sign_estimate; 1086 1087 // Enable/disable ME for interinter wedge search. 1088 int disable_interinter_wedge_newmv_search; 1089 1090 // Decide when and how to use joint_comp. 1091 DIST_WTD_COMP_FLAG use_dist_wtd_comp_flag; 1092 1093 // Clip the frequency of updating the mv cost. 1094 INTERNAL_COST_UPDATE_TYPE mv_cost_upd_level; 1095 1096 // Clip the frequency of updating the coeff cost. 1097 INTERNAL_COST_UPDATE_TYPE coeff_cost_upd_level; 1098 1099 // Clip the frequency of updating the mode cost. 1100 INTERNAL_COST_UPDATE_TYPE mode_cost_upd_level; 1101 1102 // Prune inter modes based on tpl stats 1103 // 0 : no pruning 1104 // 1 - 3 indicate increasing aggressiveness in order. 1105 int prune_inter_modes_based_on_tpl; 1106 1107 // Skip NEARMV and NEAR_NEARMV modes using ref frames of above and left 1108 // neighbor blocks and qindex. 1109 PRUNE_NEARMV_LEVEL prune_nearmv_using_neighbors; 1110 1111 // Model based breakout after interpolation filter search 1112 // 0: no breakout 1113 // 1: use model based rd breakout 1114 int model_based_post_interp_filter_breakout; 1115 1116 // Reuse compound type rd decision when exact match is found 1117 // 0: No reuse 1118 // 1: Reuse the compound type decision 1119 int reuse_compound_type_decision; 1120 1121 // Enable/disable masked compound. 1122 int disable_masked_comp; 1123 1124 // Enable/disable MV refinement for compound modes corresponds to compound 1125 // types COMPOUND_AVERAGE, COMPOUND_DISTWTD (currently, this compound type 1126 // is disabled for speeds >= 2 using the sf 'use_dist_wtd_comp_flag') and 1127 // COMPOUND_DIFFWTD based on the availability. Levels 0 to 3 indicate 1128 // increasing order of aggressiveness to disable MV refinement. 1129 // 0: MV Refinement is enabled and for NEW_NEWMV mode used two iterations of 1130 // refinement in av1_joint_motion_search(). 1131 // 1: MV Refinement is disabled for COMPOUND_DIFFWTD and enabled for 1132 // COMPOUND_AVERAGE & COMPOUND_DISTWTD. 1133 // 2: MV Refinement is enabled for COMPOUND_AVERAGE & COMPOUND_DISTWTD for 1134 // NEW_NEWMV mode with one iteration of refinement in 1135 // av1_joint_motion_search() and MV Refinement is disabled for other compound 1136 // type modes. 1137 // 3: MV Refinement is disabled. 1138 int enable_fast_compound_mode_search; 1139 1140 // Reuse masked compound type search results 1141 int reuse_mask_search_results; 1142 1143 // Enable/disable fast search for wedge masks 1144 int enable_fast_wedge_mask_search; 1145 1146 // Early breakout from transform search of inter modes 1147 int inter_mode_txfm_breakout; 1148 1149 // Limit number of inter modes for txfm search if a newmv mode gets 1150 // evaluated among the top modes. 1151 // 0: no pruning 1152 // 1 to 3 indicate increasing order of aggressiveness 1153 int limit_inter_mode_cands; 1154 1155 // Cap the no. of txfm searches for a given prediction mode. 1156 // 0: no cap, 1: cap beyond first 4 searches, 2: cap beyond first 3 searches. 1157 int limit_txfm_eval_per_mode; 1158 1159 // Prune warped motion search based on block size. 1160 int extra_prune_warped; 1161 1162 // Do not search compound modes for ARF. 1163 // The intuition is that ARF is predicted by frames far away from it, 1164 // whose temporal correlations with the ARF are likely low. 1165 // It is therefore likely that compound modes do not work as well for ARF 1166 // as other inter frames. 1167 // Speed/quality impact: 1168 // Speed 1: 12% faster, 0.1% psnr loss. 1169 // Speed 2: 2% faster, 0.05% psnr loss. 1170 // No change for speed 3 and up, because |disable_onesided_comp| is true. 1171 int skip_arf_compound; 1172 } INTER_MODE_SPEED_FEATURES; 1173 1174 typedef struct INTERP_FILTER_SPEED_FEATURES { 1175 // Do limited interpolation filter search for dual filters, since best choice 1176 // usually includes EIGHTTAP_REGULAR. 1177 int use_fast_interpolation_filter_search; 1178 1179 // Disable dual filter 1180 int disable_dual_filter; 1181 1182 // Save results of av1_interpolation_filter_search for a block 1183 // Check mv and ref_frames before search, if they are very close with previous 1184 // saved results, filter search can be skipped. 1185 int use_interp_filter; 1186 1187 // skip sharp_filter evaluation based on regular and smooth filter rd for 1188 // dual_filter=0 case 1189 int skip_sharp_interp_filter_search; 1190 1191 // skip interpolation filter search for a block in chessboard pattern 1192 int cb_pred_filter_search; 1193 1194 // adaptive interp_filter search to allow skip of certain filter types. 1195 int adaptive_interp_filter_search; 1196 1197 // Forces interpolation filter to EIGHTTAP_REGULAR and skips interpolation 1198 // filter search. 1199 int skip_interp_filter_search; 1200 } INTERP_FILTER_SPEED_FEATURES; 1201 1202 typedef struct INTRA_MODE_SPEED_FEATURES { 1203 // These bit masks allow you to enable or disable intra modes for each 1204 // transform size separately. 1205 int intra_y_mode_mask[TX_SIZES]; 1206 int intra_uv_mode_mask[TX_SIZES]; 1207 1208 // flag to allow skipping intra mode for inter frame prediction 1209 int skip_intra_in_interframe; 1210 1211 // Prune intra mode candidates based on source block histogram of gradient. 1212 // Applies to luma plane only. 1213 // Feasible values are 0..4. The feature is disabled for 0. An increasing 1214 // value indicates more aggressive pruning threshold. 1215 int intra_pruning_with_hog; 1216 1217 // Prune intra mode candidates based on source block histogram of gradient. 1218 // Applies to chroma plane only. 1219 // Feasible values are 0..4. The feature is disabled for 0. An increasing 1220 // value indicates more aggressive pruning threshold. 1221 int chroma_intra_pruning_with_hog; 1222 1223 // Enable/disable smooth intra modes. 1224 int disable_smooth_intra; 1225 1226 // Prune UV_SMOOTH_PRED mode for chroma based on chroma source variance. 1227 // false : No pruning 1228 // true : Prune UV_SMOOTH_PRED mode based on chroma source variance 1229 // 1230 // For allintra encode, this speed feature reduces instruction count 1231 // by 1.90%, 2.21% and 1.97% for speed 6, 7 and 8 with coding performance 1232 // change less than 0.04%. For AVIF image encode, this speed feature reduces 1233 // encode time by 1.56%, 2.14% and 0.90% for speed 6, 7 and 8 on a typical 1234 // image dataset with coding performance change less than 0.05%. 1235 bool prune_smooth_intra_mode_for_chroma; 1236 1237 // Prune filter intra modes in intra frames. 1238 // 0 : No pruning 1239 // 1 : Evaluate applicable filter intra modes based on best intra mode so far 1240 // 2 : Do not evaluate filter intra modes 1241 int prune_filter_intra_level; 1242 1243 // prune palette search 1244 // 0: No pruning 1245 // 1: Perform coarse search to prune the palette colors. For winner colors, 1246 // neighbors are also evaluated using a finer search. 1247 // 2: Perform 2 way palette search from max colors to min colors (and min 1248 // colors to remaining colors) and terminate the search if current number of 1249 // palette colors is not the winner. 1250 int prune_palette_search_level; 1251 1252 // Terminate early in luma palette_size search. Speed feature values indicate 1253 // increasing level of pruning. 1254 // 0: No early termination 1255 // 1: Terminate early for higher luma palette_size, if header rd cost of lower 1256 // palette_size is more than 2 * best_rd. This level of pruning is more 1257 // conservative when compared to sf level 2 as the cases which will get pruned 1258 // with sf level 1 is a subset of the cases which will get pruned with sf 1259 // level 2. 1260 // 2: Terminate early for higher luma palette_size, if header rd cost of lower 1261 // palette_size is more than best_rd. 1262 // For allintra encode, this sf reduces instruction count by 2.49%, 1.07%, 1263 // 2.76%, 2.30%, 1.84%, 2.69%, 2.04%, 2.05% and 1.44% for speed 0, 1, 2, 3, 4, 1264 // 5, 6, 7 and 8 on screen content set with coding performance change less 1265 // than 0.01% for speed <= 2 and less than 0.03% for speed >= 3. For AVIF 1266 // image encode, this sf reduces instruction count by 1.94%, 1.13%, 1.29%, 1267 // 0.93%, 0.89%, 1.03%, 1.07%, 1.20% and 0.18% for speed 0, 1, 2, 3, 4, 5, 6, 1268 // 7 and 8 on a typical image dataset with coding performance change less than 1269 // 0.01%. 1270 int prune_luma_palette_size_search_level; 1271 1272 // Prune chroma intra modes based on luma intra mode winner. 1273 // 0: No pruning 1274 // 1: Prune chroma intra modes other than UV_DC_PRED, UV_SMOOTH_PRED, 1275 // UV_CFL_PRED and the mode that corresponds to luma intra mode winner. 1276 int prune_chroma_modes_using_luma_winner; 1277 1278 // Clip the frequency of updating the mv cost for intrabc. 1279 INTERNAL_COST_UPDATE_TYPE dv_cost_upd_level; 1280 1281 // We use DCT_DCT transform followed by computing SATD (Sum of Absolute 1282 // Transformed Differences) as an estimation of RD score to quickly find the 1283 // best possible Chroma from Luma (CFL) parameter. Then we do a full RD search 1284 // near the best possible parameter. The search range is set here. 1285 // The range of cfl_searh_range should be [1, 33], and the following are the 1286 // recommended values. 1287 // 1: Fastest mode. 1288 // 3: Default mode that provides good speedup without losing compression 1289 // performance at speed 0. 1290 // 33: Exhaustive rd search (33 == CFL_MAGS_SIZE). This mode should only 1291 // be used for debugging purpose. 1292 int cfl_search_range; 1293 1294 // TOP_INTRA_MODEL_COUNT is 4 that is the number of top model rd to store in 1295 // intra mode decision. Here, add a speed feature to reduce this number for 1296 // higher speeds. 1297 int top_intra_model_count_allowed; 1298 1299 // Adapt top_intra_model_count_allowed locally to prune luma intra modes using 1300 // neighbor block and quantizer information. 1301 int adapt_top_model_rd_count_using_neighbors; 1302 1303 // Prune the evaluation of odd delta angles of directional luma intra modes by 1304 // using the rdcosts of neighbouring delta angles. 1305 // For allintra encode, this speed feature reduces instruction count 1306 // by 4.461%, 3.699% and 3.536% for speed 6, 7 and 8 on a typical video 1307 // dataset with coding performance change less than 0.26%. For AVIF image 1308 // encode, this speed feature reduces encode time by 2.849%, 2.471%, 1309 // and 2.051% for speed 6, 7 and 8 on a typical image dataset with coding 1310 // performance change less than 0.27%. 1311 int prune_luma_odd_delta_angles_in_intra; 1312 1313 // Terminate early in chroma palette_size search. 1314 // 0: No early termination 1315 // 1: Terminate early for higher palette_size, if header rd cost of lower 1316 // palette_size is more than best_rd. 1317 // For allintra encode, this sf reduces instruction count by 0.45%, 1318 // 0.62%, 1.73%, 2.50%, 2.89%, 3.09% and 3.86% for speed 0 to 6 on screen 1319 // content set with coding performance change less than 0.01%. 1320 // For AVIF image encode, this sf reduces instruction count by 0.45%, 0.81%, 1321 // 0.85%, 1.05%, 1.45%, 1.66% and 1.95% for speed 0 to 6 on a typical image 1322 // dataset with no quality drop. 1323 int early_term_chroma_palette_size_search; 1324 1325 // Skips the evaluation of filter intra modes in inter frames if rd evaluation 1326 // of luma intra dc mode results in invalid rd stats. 1327 int skip_filter_intra_in_inter_frames; 1328 } INTRA_MODE_SPEED_FEATURES; 1329 1330 typedef struct TX_SPEED_FEATURES { 1331 // Init search depth for square and rectangular transform partitions. 1332 // Values: 1333 // 0 - search full tree, 1: search 1 level, 2: search the highest level only 1334 int inter_tx_size_search_init_depth_sqr; 1335 int inter_tx_size_search_init_depth_rect; 1336 int intra_tx_size_search_init_depth_sqr; 1337 int intra_tx_size_search_init_depth_rect; 1338 1339 // If any dimension of a coding block size above 64, always search the 1340 // largest transform only, since the largest transform block size is 64x64. 1341 int tx_size_search_lgr_block; 1342 1343 TX_TYPE_SEARCH tx_type_search; 1344 1345 // Skip split transform block partition when the collocated bigger block 1346 // is selected as all zero coefficients. 1347 int txb_split_cap; 1348 1349 // Shortcut the transform block partition and type search when the target 1350 // rdcost is relatively lower. 1351 // Values are 0 (not used) , or 1 - 2 with progressively increasing 1352 // aggressiveness 1353 int adaptive_txb_search_level; 1354 1355 // Prune level for tx_size_type search for inter based on rd model 1356 // 0: no pruning 1357 // 1-2: progressively increasing aggressiveness of pruning 1358 int model_based_prune_tx_search_level; 1359 1360 // Refine TX type after fast TX search. 1361 int refine_fast_tx_search_results; 1362 1363 // Prune transform split/no_split eval based on residual properties. A value 1364 // of 0 indicates no pruning, and the aggressiveness of pruning progressively 1365 // increases from levels 1 to 3. 1366 int prune_tx_size_level; 1367 1368 // Prune the evaluation of transform depths as decided by the NN model. 1369 // false: No pruning. 1370 // true : Avoid the evaluation of specific transform depths using NN model. 1371 // 1372 // For allintra encode, this speed feature reduces instruction count 1373 // by 4.76%, 8.92% and 11.28% for speed 6, 7 and 8 with coding performance 1374 // change less than 0.32%. For AVIF image encode, this speed feature reduces 1375 // encode time by 4.65%, 9.16% and 10.45% for speed 6, 7 and 8 on a typical 1376 // image dataset with coding performance change less than 0.19%. 1377 bool prune_intra_tx_depths_using_nn; 1378 1379 // Enable/disable early breakout during transform search of intra modes, by 1380 // using the minimum rd cost possible. By using this approach, the rd 1381 // evaluation of applicable transform blocks (in the current block) can be 1382 // avoided as 1383 // 1) best_rd evolves during the search in choose_tx_size_type_from_rd() 1384 // 2) appropriate ref_best_rd is passed in intra_block_yrd() 1385 // 1386 // For allintra encode, this speed feature reduces instruction count 1387 // by 1.11%, 1.08%, 1.02% and 0.93% for speed 3, 6, 7 and 8 with coding 1388 // performance change less than 0.02%. For AVIF image encode, this speed 1389 // feature reduces encode time by 0.93%, 1.46%, 1.07%, 0.84%, 0.99% and 0.73% 1390 // for speed 3, 4, 5, 6, 7 and 8 on a typical image dataset with coding 1391 // performance change less than 0.004%. 1392 bool use_rd_based_breakout_for_intra_tx_search; 1393 } TX_SPEED_FEATURES; 1394 1395 typedef struct RD_CALC_SPEED_FEATURES { 1396 // Fast approximation of av1_model_rd_from_var_lapndz 1397 int simple_model_rd_from_var; 1398 1399 // Perform faster distortion computation during the R-D evaluation by trying 1400 // to approximate the prediction error with transform coefficients (faster but 1401 // less accurate) rather than computing distortion in the pixel domain (slower 1402 // but more accurate). The following methods are used for distortion 1403 // computation: 1404 // Method 0: Always compute distortion in the pixel domain 1405 // Method 1: Based on block error, try using transform domain distortion for 1406 // tx_type search and compute distortion in pixel domain for final RD_STATS 1407 // Method 2: Based on block error, try to compute distortion in transform 1408 // domain 1409 // Methods 1 and 2 may fallback to computing distortion in the pixel domain in 1410 // case the block error is less than the threshold, which is controlled by the 1411 // speed feature tx_domain_dist_thres_level. 1412 // 1413 // The speed feature tx_domain_dist_level decides which of the above methods 1414 // needs to be used across different mode evaluation stages as described 1415 // below: 1416 // Eval type: Default Mode Winner 1417 // Level 0 : Method 0 Method 2 Method 0 1418 // Level 1 : Method 1 Method 2 Method 0 1419 // Level 2 : Method 2 Method 2 Method 0 1420 // Level 3 : Method 2 Method 2 Method 2 1421 int tx_domain_dist_level; 1422 1423 // Transform domain distortion threshold level 1424 int tx_domain_dist_thres_level; 1425 1426 // Trellis (dynamic programming) optimization of quantized values 1427 TRELLIS_OPT_TYPE optimize_coefficients; 1428 1429 // Use hash table to store macroblock RD search results 1430 // to avoid repeated search on the same residue signal. 1431 int use_mb_rd_hash; 1432 1433 // Flag used to control the extent of coeff R-D optimization 1434 int perform_coeff_opt; 1435 } RD_CALC_SPEED_FEATURES; 1436 1437 typedef struct WINNER_MODE_SPEED_FEATURES { 1438 // Flag used to control the winner mode processing for better R-D optimization 1439 // of quantized coeffs 1440 int enable_winner_mode_for_coeff_opt; 1441 1442 // Flag used to control the winner mode processing for transform size 1443 // search method 1444 int enable_winner_mode_for_tx_size_srch; 1445 1446 // Control transform size search level 1447 // Eval type: Default Mode Winner 1448 // Level 0 : FULL RD LARGEST ALL FULL RD 1449 // Level 1 : FAST RD LARGEST ALL FULL RD 1450 // Level 2 : LARGEST ALL LARGEST ALL FULL RD 1451 // Level 3 : LARGEST ALL LARGEST ALL LARGEST ALL 1452 int tx_size_search_level; 1453 1454 // Flag used to control the winner mode processing for use transform 1455 // domain distortion 1456 int enable_winner_mode_for_use_tx_domain_dist; 1457 1458 // Flag used to enable processing of multiple winner modes 1459 MULTI_WINNER_MODE_TYPE multi_winner_mode_type; 1460 1461 // Motion mode for winner candidates: 1462 // 0: speed feature OFF 1463 // 1 / 2 : Use configured number of winner candidates 1464 int motion_mode_for_winner_cand; 1465 1466 // Controls the prediction of transform skip block or DC only block. 1467 // 1468 // Different speed feature values (0 to 3) decide the aggressiveness of 1469 // prediction (refer to predict_dc_levels[][] in speed_features.c) to be used 1470 // during different mode evaluation stages. 1471 int dc_blk_pred_level; 1472 1473 // If on, disables interpolation filter search in handle_inter_mode loop, and 1474 // performs it during winner mode processing by \ref 1475 // tx_search_best_inter_candidates. 1476 int winner_mode_ifs; 1477 1478 // Controls the disabling of winner mode processing. Speed feature levels 1479 // are ordered in increasing aggressiveness of pruning. The method considered 1480 // for disabling, depends on the sf level value and it is described as below. 1481 // 0: Do not disable 1482 // 1: Disable for blocks with low source variance. 1483 // 2: Disable for blocks which turn out to be transform skip (skipped based on 1484 // eob) during MODE_EVAL stage except NEWMV mode. 1485 // 3: Disable for blocks which turn out to be transform skip during MODE_EVAL 1486 // stage except NEWMV mode. For high quantizers, prune conservatively based on 1487 // transform skip (skipped based on eob) except for NEWMV mode. 1488 // 4: Disable for blocks which turn out to be transform skip during MODE_EVAL 1489 // stage. 1490 int prune_winner_mode_eval_level; 1491 } WINNER_MODE_SPEED_FEATURES; 1492 1493 typedef struct LOOP_FILTER_SPEED_FEATURES { 1494 // This feature controls how the loop filter level is determined. 1495 LPF_PICK_METHOD lpf_pick; 1496 1497 // Skip some final iterations in the determination of the best loop filter 1498 // level. 1499 int use_coarse_filter_level_search; 1500 1501 // Control how the CDEF strength is determined. 1502 CDEF_PICK_METHOD cdef_pick_method; 1503 1504 // Decoder side speed feature to add penalty for use of dual-sgr filters. 1505 // Takes values 0 - 10, 0 indicating no penalty and each additional level 1506 // adding a penalty of 1% 1507 int dual_sgr_penalty_level; 1508 1509 // prune sgr ep using binary search like mechanism 1510 int enable_sgr_ep_pruning; 1511 1512 // Disable loop restoration for Chroma plane 1513 int disable_loop_restoration_chroma; 1514 1515 // Disable loop restoration for luma plane 1516 int disable_loop_restoration_luma; 1517 1518 // Range of loop restoration unit sizes to search 1519 // The minimum size is clamped against the superblock size in 1520 // av1_pick_filter_restoration, so that the code which sets this value does 1521 // not need to know the superblock size ahead of time. 1522 int min_lr_unit_size; 1523 int max_lr_unit_size; 1524 1525 // Prune RESTORE_WIENER evaluation based on source variance 1526 // 0 : no pruning 1527 // 1 : conservative pruning 1528 // 2 : aggressive pruning 1529 int prune_wiener_based_on_src_var; 1530 1531 // Prune self-guided loop restoration based on wiener search results 1532 // 0 : no pruning 1533 // 1 : pruning based on rdcost ratio of RESTORE_WIENER and RESTORE_NONE 1534 // 2 : pruning based on winner restoration type among RESTORE_WIENER and 1535 // RESTORE_NONE 1536 int prune_sgr_based_on_wiener; 1537 1538 // Reduce the wiener filter win size for luma 1539 int reduce_wiener_window_size; 1540 1541 // Flag to disable Wiener Loop restoration filter. 1542 bool disable_wiener_filter; 1543 1544 // Flag to disable Self-guided Loop restoration filter. 1545 bool disable_sgr_filter; 1546 1547 // Disable the refinement search around the wiener filter coefficients. 1548 bool disable_wiener_coeff_refine_search; 1549 1550 // Whether to downsample the rows in computation of wiener stats. 1551 int use_downsampled_wiener_stats; 1552 } LOOP_FILTER_SPEED_FEATURES; 1553 1554 typedef struct REAL_TIME_SPEED_FEATURES { 1555 // check intra prediction for non-RD mode. 1556 int check_intra_pred_nonrd; 1557 1558 // Skip checking intra prediction. 1559 // 0 - don't skip 1560 // 1 - skip if TX is skipped and best mode is not NEWMV 1561 // 2 - skip if TX is skipped 1562 // Skipping aggressiveness increases from level 1 to 2. 1563 int skip_intra_pred; 1564 1565 // Estimate motion before calculating variance in variance-based partition 1566 // 0 - Only use zero MV 1567 // 1 - perform coarse ME 1568 // 2 - perform coarse ME, and also use neighbours' MVs 1569 // 3 - use neighbours' MVs without performing coarse ME 1570 int estimate_motion_for_var_based_partition; 1571 1572 // For nonrd_use_partition: mode of extra check of leaf partition 1573 // 0 - don't check merge 1574 // 1 - always check merge 1575 // 2 - check merge and prune checking final split 1576 // 3 - check merge and prune checking final split based on bsize and qindex 1577 int nonrd_check_partition_merge_mode; 1578 1579 // For nonrd_use_partition: check of leaf partition extra split 1580 int nonrd_check_partition_split; 1581 1582 // Implements various heuristics to skip searching modes 1583 // The heuristics selected are based on flags 1584 // defined in the MODE_SEARCH_SKIP_HEURISTICS enum 1585 unsigned int mode_search_skip_flags; 1586 1587 // For nonrd: Reduces ref frame search. 1588 // 0 - low level of search prune in non last frames 1589 // 1 - pruned search in non last frames 1590 // 2 - more pruned search in non last frames 1591 int nonrd_prune_ref_frame_search; 1592 1593 // This flag controls the use of non-RD mode decision. 1594 int use_nonrd_pick_mode; 1595 1596 // Use ALTREF frame in non-RD mode decision. 1597 int use_nonrd_altref_frame; 1598 1599 // Use compound reference for non-RD mode. 1600 int use_comp_ref_nonrd; 1601 1602 // Reference frames for compound prediction for nonrd pickmode: 1603 // LAST_GOLDEN (0), LAST_LAST2 (1), or LAST_ALTREF (2). 1604 int ref_frame_comp_nonrd[3]; 1605 1606 // use reduced ref set for real-time mode 1607 int use_real_time_ref_set; 1608 1609 // Skip a number of expensive mode evaluations for blocks with very low 1610 // temporal variance. 1611 int short_circuit_low_temp_var; 1612 1613 // Reuse inter prediction in fast non-rd mode. 1614 int reuse_inter_pred_nonrd; 1615 1616 // Number of best inter modes to search transform. INT_MAX - search all. 1617 int num_inter_modes_for_tx_search; 1618 1619 // Use interpolation filter search in non-RD mode decision. 1620 int use_nonrd_filter_search; 1621 1622 // Use simplified RD model for interpolation search and Intra 1623 int use_simple_rd_model; 1624 1625 // For nonrd mode: use hybrid intra mode search for intra only frames based on 1626 // block properties. 1627 // 0 : use nonrd pick intra for all blocks 1628 // 1 : use rd for bsize < 16x16, nonrd otherwise 1629 // 2 : use rd for bsize < 16x16 and src var >= 101, nonrd otherwise 1630 int hybrid_intra_pickmode; 1631 1632 // Filter blocks by certain criteria such as SAD, source variance, such that 1633 // fewer blocks will go through the palette search. 1634 // For nonrd encoding path, enable this feature reduces encoding time when 1635 // palette mode is used. Disabling it leads to better compression efficiency. 1636 // 0: off 1637 // 1: less aggressive pruning mode 1638 // 2: more aggressive pruning mode 1639 int prune_palette_search_nonrd; 1640 1641 // Compute variance/sse on source difference, prior to encoding superblock. 1642 int source_metrics_sb_nonrd; 1643 1644 // Flag to indicate process for handling overshoot on slide/scene change, 1645 // for real-time CBR mode. 1646 OVERSHOOT_DETECTION_CBR overshoot_detection_cbr; 1647 1648 // Check for scene/content change detection on every frame before encoding. 1649 int check_scene_detection; 1650 1651 // For keyframes in rtc: adjust the rc_bits_per_mb, to reduce overshoot. 1652 int rc_adjust_keyframe; 1653 1654 // On scene change: compute spatial variance. 1655 int rc_compute_spatial_var_sc; 1656 1657 // For nonrd mode: Prefer larger partition blks in variance based partitioning 1658 // 0: disabled, 1-3: increasing aggressiveness 1659 int prefer_large_partition_blocks; 1660 1661 // uses results of temporal noise estimate 1662 int use_temporal_noise_estimate; 1663 1664 // Parameter indicating initial search window to be used in full-pixel search 1665 // for nonrd_pickmode. Range [0, MAX_MVSEARCH_STEPS - 1]. Lower value 1666 // indicates larger window. If set to 0, step_param is set based on internal 1667 // logic in set_mv_search_params(). 1668 int fullpel_search_step_param; 1669 1670 // Bit mask to enable or disable intra modes for each prediction block size 1671 // separately, for nonrd_pickmode. Currently, the sf is not respected when 1672 // 'force_intra_check' is true in 'av1_estimate_intra_mode()' function. Also, 1673 // H and V pred modes allowed through this sf can be further pruned when 1674 //'prune_hv_pred_modes_using_src_sad' sf is true. 1675 int intra_y_mode_bsize_mask_nrd[BLOCK_SIZES]; 1676 1677 // Prune H and V intra predition modes evalution in inter frame. 1678 // The sf does not have any impact. 1679 // i. when frame_source_sad is 1.1 times greater than avg_source_sad 1680 // ii. when cyclic_refresh_segment_id_boosted is enabled 1681 // iii. when SB level source sad is greater than kMedSad 1682 // iv. when color sensitivity is non zero for both the chroma channels 1683 bool prune_hv_pred_modes_using_src_sad; 1684 1685 // Skips mode checks more aggressively in nonRD mode 1686 int nonrd_aggressive_skip; 1687 1688 // Skip cdef on 64x64 blocks/ 1689 // 0: disabled 1690 // 1: skip when NEWMV or INTRA is not picked or color sensitivity is off. 1691 // When color sensitivity is on for a superblock, all 64x64 blocks within 1692 // will not skip. 1693 // 2: more aggressive mode where skip is done for all frames where 1694 // rc->high_source_sad = 0 (non slide-changes), and color sensitivity off. 1695 int skip_cdef_sb; 1696 1697 // Force selective cdf update. 1698 int selective_cdf_update; 1699 1700 // Force only single reference (LAST) for prediction. 1701 int force_only_last_ref; 1702 1703 // Forces larger partition blocks in variance based partitioning for intra 1704 // frames 1705 int force_large_partition_blocks_intra; 1706 1707 // Use fixed partition for superblocks based on source_sad. 1708 // 0: disabled 1709 // 1: enabled 1710 int use_fast_fixed_part; 1711 1712 // Increase source_sad thresholds in nonrd pickmode. 1713 int increase_source_sad_thresh; 1714 1715 // Skip evaluation of no split in tx size selection for merge partition 1716 int skip_tx_no_split_var_based_partition; 1717 1718 // Intermediate termination of newMV mode evaluation based on so far best mode 1719 // sse 1720 int skip_newmv_mode_based_on_sse; 1721 1722 // Define gf length multiplier. 1723 // Level 0: use large multiplier, level 1: use medium multiplier. 1724 int gf_length_lvl; 1725 1726 // Prune inter modes with golden frame as reference for NEARMV and NEWMV modes 1727 int prune_inter_modes_with_golden_ref; 1728 1729 // Prune inter modes w.r.t golden or alt-ref frame based on sad 1730 int prune_inter_modes_wrt_gf_arf_based_on_sad; 1731 1732 // Prune inter mode search in rd path based on current block's temporal 1733 // variance wrt LAST reference. 1734 int prune_inter_modes_using_temp_var; 1735 1736 // Reduce MV precision to halfpel for higher int MV value & frame-level motion 1737 // 0: disabled 1738 // 1-2: Reduce precision to halfpel, fullpel based on conservative 1739 // thresholds, aggressiveness increases with increase in level 1740 // 3: Reduce precision to halfpel using more aggressive thresholds 1741 int reduce_mv_pel_precision_highmotion; 1742 1743 // Reduce MV precision for low complexity blocks 1744 // 0: disabled 1745 // 1: Reduce the mv resolution for zero mv if the variance is low 1746 // 2: Switch to halfpel, fullpel based on low block spatial-temporal 1747 // complexity. 1748 int reduce_mv_pel_precision_lowcomplex; 1749 1750 // Prune intra mode evaluation in inter frames based on mv range. 1751 BLOCK_SIZE prune_intra_mode_based_on_mv_range; 1752 // The number of times to left shift the splitting thresholds in variance 1753 // based partitioning. The minimum values should be 7 to avoid left shifting 1754 // by a negative number. 1755 int var_part_split_threshold_shift; 1756 1757 // Qindex based variance partition threshold index, which determines 1758 // the aggressiveness of partition pruning 1759 // 0: disabled for speeds 9,10 1760 // 1,2: (rd-path) lowers qindex thresholds conditionally (for low SAD sb) 1761 // 3,4: (non-rd path) uses pre-tuned qindex thresholds 1762 int var_part_based_on_qidx; 1763 1764 // Enable GF refresh based on Q value. 1765 int gf_refresh_based_on_qp; 1766 1767 // Temporal filtering 1768 // The value can be 1 or 2, which indicates the threshold to use. 1769 // Must be off for lossless mode. 1770 int use_rtc_tf; 1771 1772 // Use of the identity transform in nonrd_pickmode, 1773 int use_idtx_nonrd; 1774 1775 // Prune the use of the identity transform in nonrd_pickmode: 1776 // only for smaller blocks and higher spatial variance, and when skip_txfm 1777 // is not already set. 1778 int prune_idtx_nonrd; 1779 1780 // Force to only use dct for palette search in nonrd pickmode. 1781 int dct_only_palette_nonrd; 1782 1783 // Skip loopfilter, for static content after slide change 1784 // or key frame, once quality has ramped up. 1785 // 0: disabled 1786 // 1: skip only after quality is ramped up. 1787 // 2: aggrssive mode, where skip is done for all frames that 1788 // where rc->high_source_sad = 0 (no slide-changes). 1789 int skip_lf_screen; 1790 1791 // Threshold on the active/inactive region percent to disable 1792 // the loopfilter and cdef. Setting to 100 disables this feature. 1793 int thresh_active_maps_skip_lf_cdef; 1794 1795 // For nonrd: early exit out of variance partition that sets the 1796 // block size to superblock size, and sets mode to zeromv-last skip. 1797 // 0: disabled 1798 // 1: zeromv-skip is enabled at SB level only 1799 // 2: zeromv-skip is enabled at SB level and coding block level 1800 int part_early_exit_zeromv; 1801 1802 // Early terminate inter mode search based on sse in non-rd path. 1803 INTER_SEARCH_EARLY_TERM_IDX sse_early_term_inter_search; 1804 1805 // SAD based adaptive altref selection 1806 int sad_based_adp_altref_lag; 1807 1808 // Enable/disable partition direct merging. 1809 int partition_direct_merging; 1810 1811 // Level of aggressiveness for obtaining tx size based on qstep 1812 int tx_size_level_based_on_qstep; 1813 1814 // Avoid the partitioning of a 16x16 block in variance based partitioning 1815 // (VBP) by making use of minimum and maximum sub-block variances. 1816 // For allintra encode, this speed feature reduces instruction count by 5.39% 1817 // for speed 9 on a typical video dataset with coding performance gain 1818 // of 1.44%. 1819 // For AVIF image encode, this speed feature reduces encode time 1820 // by 8.44% for speed 9 on a typical image dataset with coding performance 1821 // gain of 0.78%. 1822 bool vbp_prune_16x16_split_using_min_max_sub_blk_var; 1823 1824 // A qindex threshold that determines whether to use qindex based CDEF filter 1825 // strength estimation for screen content types. The strength estimation model 1826 // used for screen contents prefers to allow cdef filtering for more frames. 1827 // This sf is used to limit the frames which go through cdef filtering and 1828 // following explains the setting of the same. 1829 // MAXQ (255): This disables the usage of this sf. Here, frame does not use a 1830 // screen content model thus reduces the number of frames that go through cdef 1831 // filtering. 1832 // MINQ (0): Frames always use screen content model thus increasing the number 1833 // of frames that go through cdef filtering. 1834 // This speed feature has a substantial gain on coding metrics, with moderate 1835 // increase encoding time. Select threshold based on speed vs quality 1836 // trade-off. 1837 int screen_content_cdef_filter_qindex_thresh; 1838 1839 // Prune compound mode if its variance is higher than the variance of single 1840 // modes. 1841 bool prune_compoundmode_with_singlecompound_var; 1842 1843 // Allow mode cost update at frame level every couple frames. This 1844 // overrides the command line setting --mode-cost-upd-freq=3 (never update 1845 // except on key frame and first delta). 1846 bool frame_level_mode_cost_update; 1847 1848 // Prune H_PRED during intra mode evaluation in the nonrd path based on best 1849 // mode so far. 1850 // 1851 // For allintra encode, this speed feature reduces instruction count by 1.10% 1852 // for speed 9 with coding performance change less than 0.04%. 1853 // For AVIF image encode, this speed feature reduces encode time by 1.03% for 1854 // speed 9 on a typical image dataset with coding performance change less than 1855 // 0.08%. 1856 bool prune_h_pred_using_best_mode_so_far; 1857 1858 // Enable pruning of intra mode evaluations in nonrd path based on source 1859 // variance and best mode so far. The pruning logic is enabled only if the 1860 // mode is not a winner mode of both the neighboring blocks (left/top). 1861 // 1862 // For allintra encode, this speed feature reduces instruction count by 3.96% 1863 // for speed 9 with coding performance change less than 0.38%. 1864 // For AVIF image encode, this speed feature reduces encode time by 3.46% for 1865 // speed 9 on a typical image dataset with coding performance change less than 1866 // -0.06%. 1867 bool enable_intra_mode_pruning_using_neighbors; 1868 1869 // Prune intra mode evaluations in nonrd path based on best sad so far. 1870 // 1871 // For allintra encode, this speed feature reduces instruction count by 3.05% 1872 // for speed 9 with coding performance change less than 0.24%. 1873 // For AVIF image encode, this speed feature reduces encode time by 1.87% for 1874 // speed 9 on a typical image dataset with coding performance change less than 1875 // 0.16%. 1876 bool prune_intra_mode_using_best_sad_so_far; 1877 1878 // If compound is enabled, and the current block size is \geq BLOCK_16X16, 1879 // limit the compound modes to GLOBAL_GLOBALMV. This does not apply to the 1880 // base layer of svc. 1881 bool check_only_zero_zeromv_on_large_blocks; 1882 1883 // Allow for disabling cdf update for non reference frames in svc mode. 1884 bool disable_cdf_update_non_reference_frame; 1885 1886 // Prune compound modes if the single modes variances do not perform well. 1887 bool prune_compoundmode_with_singlemode_var; 1888 1889 // Skip searching all compound mode if the variance of single_mode residue is 1890 // sufficiently low. 1891 bool skip_compound_based_on_var; 1892 1893 // Sets force_zeromv_skip based on the source sad available. Aggressiveness 1894 // increases with increase in the level set for speed feature. 1895 // 0: No setting 1896 // 1: If source sad is kZeroSad 1897 // 2: If source sad <= kVeryLowSad 1898 int set_zeromv_skip_based_on_source_sad; 1899 1900 // Downgrades the block-level subpel motion search to 1901 // av1_find_best_sub_pixel_tree_pruned_more for higher QP and when fullpel 1902 // search performed well, zeromv has low sad or low source_var 1903 bool use_adaptive_subpel_search; 1904 1905 // A flag used in RTC case to control frame_refs_short_signaling. Note that 1906 // the final decision is made in check_frame_refs_short_signaling(). The flag 1907 // can only be turned on when res < 360p and speed >= 9, in which case only 1908 // LAST and GOLDEN ref frames are used now. 1909 bool enable_ref_short_signaling; 1910 1911 // A flag that controls if we check or bypass GLOBALMV in rtc single ref frame 1912 // case. 1913 bool check_globalmv_on_single_ref; 1914 1915 // Allows for increasing the color_threshold for palette prediction. 1916 // This generally leads to better coding efficiency but with some speed loss. 1917 // Only used for screen content and for nonrd_pickmode. 1918 bool increase_color_thresh_palette; 1919 1920 // Flag to indicate selecting of higher threshold for scenee change detection. 1921 int higher_thresh_scene_detection; 1922 1923 // FLag to indicate skip testing of NEWMV for flat blocks. 1924 int skip_newmv_flat_blocks_screen; 1925 1926 // Flag to force skip encoding for non_reference_frame on slide/scene changes. 1927 int skip_encoding_non_reference_slide_change; 1928 1929 // Flag to indicate more aggressive QP downward adjustment for screen static 1930 // content, to make convergence to min_qp faster. 1931 int rc_faster_convergence_static; 1932 } REAL_TIME_SPEED_FEATURES; 1933 1934 /*!\endcond */ 1935 1936 /*! 1937 * \brief Top level speed vs quality trade off data struture. 1938 */ 1939 typedef struct SPEED_FEATURES { 1940 /*! 1941 * Sequence/frame level speed features: 1942 */ 1943 HIGH_LEVEL_SPEED_FEATURES hl_sf; 1944 1945 /*! 1946 * Speed features for the first pass. 1947 */ 1948 FIRST_PASS_SPEED_FEATURES fp_sf; 1949 1950 /*! 1951 * Speed features related to how tpl's searches are done. 1952 */ 1953 TPL_SPEED_FEATURES tpl_sf; 1954 1955 /*! 1956 * Global motion speed features: 1957 */ 1958 GLOBAL_MOTION_SPEED_FEATURES gm_sf; 1959 1960 /*! 1961 * Partition search speed features: 1962 */ 1963 PARTITION_SPEED_FEATURES part_sf; 1964 1965 /*! 1966 * Motion search speed features: 1967 */ 1968 MV_SPEED_FEATURES mv_sf; 1969 1970 /*! 1971 * Inter mode search speed features: 1972 */ 1973 INTER_MODE_SPEED_FEATURES inter_sf; 1974 1975 /*! 1976 * Interpolation filter search speed features: 1977 */ 1978 INTERP_FILTER_SPEED_FEATURES interp_sf; 1979 1980 /*! 1981 * Intra mode search speed features: 1982 */ 1983 INTRA_MODE_SPEED_FEATURES intra_sf; 1984 1985 /*! 1986 * Transform size/type search speed features: 1987 */ 1988 TX_SPEED_FEATURES tx_sf; 1989 1990 /*! 1991 * RD calculation speed features: 1992 */ 1993 RD_CALC_SPEED_FEATURES rd_sf; 1994 1995 /*! 1996 * Two-pass mode evaluation features: 1997 */ 1998 WINNER_MODE_SPEED_FEATURES winner_mode_sf; 1999 2000 /*! 2001 * In-loop filter speed features: 2002 */ 2003 LOOP_FILTER_SPEED_FEATURES lpf_sf; 2004 2005 /*! 2006 * Real-time mode speed features: 2007 */ 2008 REAL_TIME_SPEED_FEATURES rt_sf; 2009 } SPEED_FEATURES; 2010 /*!\cond */ 2011 2012 struct AV1_COMP; 2013 2014 /*!\endcond */ 2015 /*!\brief Frame size independent speed vs quality trade off flags 2016 * 2017 *\ingroup speed_features 2018 * 2019 * \param[in] cpi Top - level encoder instance structure 2020 * \param[in] speed Speed setting passed in from the command line 2021 * 2022 * \remark No return value but configures the various speed trade off flags 2023 * based on the passed in speed setting. (Higher speed gives lower 2024 * quality) 2025 */ 2026 void av1_set_speed_features_framesize_independent(struct AV1_COMP *cpi, 2027 int speed); 2028 2029 /*!\brief Frame size dependent speed vs quality trade off flags 2030 * 2031 *\ingroup speed_features 2032 * 2033 * \param[in] cpi Top - level encoder instance structure 2034 * \param[in] speed Speed setting passed in from the command line 2035 * 2036 * \remark No return value but configures the various speed trade off flags 2037 * based on the passed in speed setting and frame size. (Higher speed 2038 * corresponds to lower quality) 2039 */ 2040 void av1_set_speed_features_framesize_dependent(struct AV1_COMP *cpi, 2041 int speed); 2042 /*!\brief Q index dependent speed vs quality trade off flags 2043 * 2044 *\ingroup speed_features 2045 * 2046 * \param[in] cpi Top - level encoder instance structure 2047 * \param[in] speed Speed setting passed in from the command line 2048 * 2049 * \remark No return value but configures the various speed trade off flags 2050 * based on the passed in speed setting and current frame's Q index. 2051 * (Higher speed corresponds to lower quality) 2052 */ 2053 void av1_set_speed_features_qindex_dependent(struct AV1_COMP *cpi, int speed); 2054 2055 #ifdef __cplusplus 2056 } // extern "C" 2057 #endif 2058 2059 #endif // AOM_AV1_ENCODER_SPEED_FEATURES_H_ 2060