AOMedia AV1 Codec: av1/encoder/speed_features.h Source File

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speed_features.h
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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
21extern "C" {
22#endif
23
25
27#define MAX_MESH_STEP 4
28
29typedef struct MESH_PATTERN {
30 int range;
31 int interval;
32} MESH_PATTERN;
33
34enum {
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
46enum {
47 DIST_WTD_COMP_ENABLED,
48 DIST_WTD_COMP_SKIP_MV_SEARCH,
49 DIST_WTD_COMP_DISABLED,
50} UENUM1BYTE(DIST_WTD_COMP_FLAG);
51
52enum {
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
85enum {
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
99enum {
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
111enum {
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 */
125enum {
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
140enum {
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
147enum {
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);
160
164 typedef enum {
165 CDEF_FULL_SEARCH,
166 CDEF_FAST_SEARCH_LVL1,
167 CDEF_FAST_SEARCH_LVL2,
168 CDEF_FAST_SEARCH_LVL3,
170 CDEF_FAST_SEARCH_LVL4,
171 CDEF_FAST_SEARCH_LVL5,
172 CDEF_PICK_FROM_Q,
173 CDEF_PICK_METHODS
174} CDEF_PICK_METHOD;
175
177enum {
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
196enum {
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
210enum {
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
219enum {
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
236enum {
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
244enum {
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
257typedef 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
295enum {
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
311enum {
312 NOT_IN_USE,
313 DIRECT_PRED,
314 RELAXED_PRED,
315 ADAPT_PRED
316} UENUM1BYTE(MAX_PART_PRED_MODE);
317
318enum {
319 LAST_MV_DATA,
320 CURRENT_Q,
321 QTR_ONLY,
322} UENUM1BYTE(MV_PREC_LOGIC);
323
324enum {
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);
330
346 typedef enum {
347 INTERNAL_COST_UPD_OFF,
348 INTERNAL_COST_UPD_TILE,
349 INTERNAL_COST_UPD_SBROW_SET,
350 INTERNAL_COST_UPD_SBROW,
351 INTERNAL_COST_UPD_SB,
352} INTERNAL_COST_UPDATE_TYPE;
353
358 typedef enum {
359 NO_PRUNING = -1,
360 SIMPLE_AGG_LVL0,
361 SIMPLE_AGG_LVL1,
362 SIMPLE_AGG_LVL2,
363 SIMPLE_AGG_LVL3,
364 QIDX_BASED_AGG_LVL1,
367 TOTAL_SIMPLE_AGG_LVLS = QIDX_BASED_AGG_LVL1,
369 TOTAL_QINDEX_BASED_AGG_LVLS =
370 QIDX_BASED_AGG_LVL1 -
371 SIMPLE_AGG_LVL3,
373 TOTAL_AGG_LVLS = TOTAL_SIMPLE_AGG_LVLS +
374 TOTAL_QINDEX_BASED_AGG_LVLS,
375} SIMPLE_MOTION_SEARCH_PRUNE_LEVEL;
376
380 typedef enum {
381 PRUNE_MESH_SEARCH_DISABLED = 0,
382 PRUNE_MESH_SEARCH_LVL_1 = 1,
383 PRUNE_MESH_SEARCH_LVL_2 = 2,
384} PRUNE_MESH_SEARCH_LEVEL;
385
390 typedef enum {
391 EARLY_TERM_DISABLED =
392 0,
393 EARLY_TERM_IDX_1 =
394 1,
395 EARLY_TERM_IDX_2 =
396 2,
397 EARLY_TERM_IDX_3 =
398 3,
399 EARLY_TERM_IDX_4 =
400 4,
401 EARLY_TERM_INDICES,
402} INTER_SEARCH_EARLY_TERM_IDX;
403
407 typedef struct HIGH_LEVEL_SPEED_FEATURES {
409 int frame_parameter_update;
410
414 RECODE_LOOP_TYPE recode_loop;
415
420 int recode_tolerance;
421
428 MV_PREC_LOGIC high_precision_mv_usage;
429
437 int static_segmentation;
438
442 SUPERRES_AUTO_SEARCH_TYPE superres_auto_search_type;
443
447 int disable_extra_sc_testing;
448
452 int second_alt_ref_filtering;
453
462 int adjust_num_frames_for_arf_filtering;
463
469 int accurate_bit_estimate;
470
476 int weight_calc_level_in_tf;
477
484 int allow_sub_blk_me_in_tf;
485} HIGH_LEVEL_SPEED_FEATURES;
486
490 typedef struct FIRST_PASS_SPEED_FEATURES {
497 int reduce_mv_step_param;
498
502 int skip_motion_search_threshold;
503
507 int disable_recon;
508
512 int skip_zeromv_motion_search;
513} FIRST_PASS_SPEED_FEATURES;
514
516typedef 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
571typedef 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
597typedef 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
827typedef 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(chiyotsai@google.com): 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
925typedef 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
1174typedef 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
1202typedef 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
1330typedef 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
1395typedef 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
1437typedef 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
1493typedef 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
1554typedef 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
1935
1939 typedef struct SPEED_FEATURES {
1943 HIGH_LEVEL_SPEED_FEATURES hl_sf;
1944
1948 FIRST_PASS_SPEED_FEATURES fp_sf;
1949
1953 TPL_SPEED_FEATURES tpl_sf;
1954
1958 GLOBAL_MOTION_SPEED_FEATURES gm_sf;
1959
1963 PARTITION_SPEED_FEATURES part_sf;
1964
1968 MV_SPEED_FEATURES mv_sf;
1969
1973 INTER_MODE_SPEED_FEATURES inter_sf;
1974
1978 INTERP_FILTER_SPEED_FEATURES interp_sf;
1979
1983 INTRA_MODE_SPEED_FEATURES intra_sf;
1984
1988 TX_SPEED_FEATURES tx_sf;
1989
1993 RD_CALC_SPEED_FEATURES rd_sf;
1994
1998 WINNER_MODE_SPEED_FEATURES winner_mode_sf;
1999
2003 LOOP_FILTER_SPEED_FEATURES lpf_sf;
2004
2008 REAL_TIME_SPEED_FEATURES rt_sf;
2009} SPEED_FEATURES;
2010
2011
2012struct AV1_COMP;
2013
2026 void av1_set_speed_features_framesize_independent(struct AV1_COMP *cpi,
2027 int speed);
2028
2040 void av1_set_speed_features_framesize_dependent(struct AV1_COMP *cpi,
2041 int speed);
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_
enums.h
prune_zero_mv_with_sse
static int prune_zero_mv_with_sse(const aom_variance_fn_ptr_t *fn_ptr, const MACROBLOCK *x, BLOCK_SIZE bsize, const HandleInterModeArgs *args, int prune_zero_mv_with_sse)
Prunes ZeroMV Search Using Best NEWMV's SSE.
Definition rdopt.c:2501
av1_set_speed_features_framesize_independent
void av1_set_speed_features_framesize_independent(struct AV1_COMP *cpi, int speed)
Frame size independent speed vs quality trade off flags.
av1_set_speed_features_qindex_dependent
void av1_set_speed_features_qindex_dependent(struct AV1_COMP *cpi, int speed)
Q index dependent speed vs quality trade off flags.
av1_set_speed_features_framesize_dependent
void av1_set_speed_features_framesize_dependent(struct AV1_COMP *cpi, int speed)
Frame size dependent speed vs quality trade off flags.
INTERNAL_COST_UPDATE_TYPE
INTERNAL_COST_UPDATE_TYPE
This enum decides internally how often to update the entropy costs.
Definition speed_features.h:346
INTERNAL_COST_UPD_OFF
@ INTERNAL_COST_UPD_OFF
Definition speed_features.h:347
INTERNAL_COST_UPD_SBROW_SET
@ INTERNAL_COST_UPD_SBROW_SET
Definition speed_features.h:349
INTERNAL_COST_UPD_SBROW
@ INTERNAL_COST_UPD_SBROW
Definition speed_features.h:350
INTERNAL_COST_UPD_SB
@ INTERNAL_COST_UPD_SB
Definition speed_features.h:351
INTERNAL_COST_UPD_TILE
@ INTERNAL_COST_UPD_TILE
Definition speed_features.h:348
INTER_SEARCH_EARLY_TERM_IDX
INTER_SEARCH_EARLY_TERM_IDX
This enumeration defines inter search early termination index in non-rd path based on sse value.
Definition speed_features.h:390
EARLY_TERM_INDICES
@ EARLY_TERM_INDICES
Definition speed_features.h:401
EARLY_TERM_IDX_1
@ EARLY_TERM_IDX_1
Definition speed_features.h:393
EARLY_TERM_IDX_4
@ EARLY_TERM_IDX_4
Definition speed_features.h:399
EARLY_TERM_IDX_2
@ EARLY_TERM_IDX_2
Definition speed_features.h:395
EARLY_TERM_DISABLED
@ EARLY_TERM_DISABLED
Definition speed_features.h:391
EARLY_TERM_IDX_3
@ EARLY_TERM_IDX_3
Definition speed_features.h:397
SIMPLE_MOTION_SEARCH_PRUNE_LEVEL
SIMPLE_MOTION_SEARCH_PRUNE_LEVEL
This enumeration defines a variety of simple motion search based partition prune levels.
Definition speed_features.h:358
QIDX_BASED_AGG_LVL1
@ QIDX_BASED_AGG_LVL1
Definition speed_features.h:364
SIMPLE_AGG_LVL3
@ SIMPLE_AGG_LVL3
Definition speed_features.h:363
TOTAL_SIMPLE_AGG_LVLS
@ TOTAL_SIMPLE_AGG_LVLS
Definition speed_features.h:367
SIMPLE_AGG_LVL1
@ SIMPLE_AGG_LVL1
Definition speed_features.h:361
SIMPLE_AGG_LVL0
@ SIMPLE_AGG_LVL0
Definition speed_features.h:360
TOTAL_AGG_LVLS
@ TOTAL_AGG_LVLS
Definition speed_features.h:373
SIMPLE_AGG_LVL2
@ SIMPLE_AGG_LVL2
Definition speed_features.h:362
TOTAL_QINDEX_BASED_AGG_LVLS
@ TOTAL_QINDEX_BASED_AGG_LVLS
Definition speed_features.h:369
PRUNE_MESH_SEARCH_LEVEL
PRUNE_MESH_SEARCH_LEVEL
This enumeration defines a variety of mesh search prune levels.
Definition speed_features.h:380
PRUNE_MESH_SEARCH_LVL_1
@ PRUNE_MESH_SEARCH_LVL_1
Definition speed_features.h:382
PRUNE_MESH_SEARCH_LVL_2
@ PRUNE_MESH_SEARCH_LVL_2
Definition speed_features.h:383
PRUNE_MESH_SEARCH_DISABLED
@ PRUNE_MESH_SEARCH_DISABLED
Definition speed_features.h:381
CDEF_PICK_METHOD
CDEF_PICK_METHOD
This enumeration defines a variety of CDEF pick methods.
Definition speed_features.h:164
CDEF_FAST_SEARCH_LVL2
@ CDEF_FAST_SEARCH_LVL2
Definition speed_features.h:167
CDEF_FAST_SEARCH_LVL5
@ CDEF_FAST_SEARCH_LVL5
Definition speed_features.h:171
CDEF_FAST_SEARCH_LVL1
@ CDEF_FAST_SEARCH_LVL1
Definition speed_features.h:166
CDEF_FULL_SEARCH
@ CDEF_FULL_SEARCH
Definition speed_features.h:165
CDEF_PICK_FROM_Q
@ CDEF_PICK_FROM_Q
Definition speed_features.h:172
CDEF_FAST_SEARCH_LVL4
@ CDEF_FAST_SEARCH_LVL4
Definition speed_features.h:170
CDEF_FAST_SEARCH_LVL3
@ CDEF_FAST_SEARCH_LVL3
Definition speed_features.h:168
AV1_COMP
Top level encoder structure.
Definition encoder.h:2878
AV1_COMP::speed
int speed
Definition encoder.h:3100
FIRST_PASS_SPEED_FEATURES
Definition speed_features.h:490
FIRST_PASS_SPEED_FEATURES::disable_recon
int disable_recon
Skips reconstruction by using source buffers for prediction.
Definition speed_features.h:507
FIRST_PASS_SPEED_FEATURES::reduce_mv_step_param
int reduce_mv_step_param
Reduces the mv search window. By default, the initial search window is around MIN(MIN(dims),...
Definition speed_features.h:497
FIRST_PASS_SPEED_FEATURES::skip_zeromv_motion_search
int skip_zeromv_motion_search
Skips the motion search centered on 0,0 mv.
Definition speed_features.h:512
FIRST_PASS_SPEED_FEATURES::skip_motion_search_threshold
int skip_motion_search_threshold
Skips the motion search when the zero mv has small sse.
Definition speed_features.h:502
HIGH_LEVEL_SPEED_FEATURES
Sequence/frame level speed vs quality features.
Definition speed_features.h:407
HIGH_LEVEL_SPEED_FEATURES::adjust_num_frames_for_arf_filtering
int adjust_num_frames_for_arf_filtering
Definition speed_features.h:462
HIGH_LEVEL_SPEED_FEATURES::allow_sub_blk_me_in_tf
int allow_sub_blk_me_in_tf
Definition speed_features.h:484
HIGH_LEVEL_SPEED_FEATURES::second_alt_ref_filtering
int second_alt_ref_filtering
Definition speed_features.h:452
HIGH_LEVEL_SPEED_FEATURES::frame_parameter_update
int frame_parameter_update
Definition speed_features.h:409
HIGH_LEVEL_SPEED_FEATURES::weight_calc_level_in_tf
int weight_calc_level_in_tf
Definition speed_features.h:476
HIGH_LEVEL_SPEED_FEATURES::high_precision_mv_usage
MV_PREC_LOGIC high_precision_mv_usage
Definition speed_features.h:428
HIGH_LEVEL_SPEED_FEATURES::disable_extra_sc_testing
int disable_extra_sc_testing
Definition speed_features.h:447
HIGH_LEVEL_SPEED_FEATURES::recode_tolerance
int recode_tolerance
Definition speed_features.h:420
HIGH_LEVEL_SPEED_FEATURES::superres_auto_search_type
SUPERRES_AUTO_SEARCH_TYPE superres_auto_search_type
Definition speed_features.h:442
HIGH_LEVEL_SPEED_FEATURES::static_segmentation
int static_segmentation
Definition speed_features.h:437
HIGH_LEVEL_SPEED_FEATURES::accurate_bit_estimate
int accurate_bit_estimate
Definition speed_features.h:469
HIGH_LEVEL_SPEED_FEATURES::recode_loop
RECODE_LOOP_TYPE recode_loop
Definition speed_features.h:414
SPEED_FEATURES
Top level speed vs quality trade off data struture.
Definition speed_features.h:1939
SPEED_FEATURES::mv_sf
MV_SPEED_FEATURES mv_sf
Definition speed_features.h:1968
SPEED_FEATURES::tpl_sf
TPL_SPEED_FEATURES tpl_sf
Definition speed_features.h:1953
SPEED_FEATURES::lpf_sf
LOOP_FILTER_SPEED_FEATURES lpf_sf
Definition speed_features.h:2003
SPEED_FEATURES::tx_sf
TX_SPEED_FEATURES tx_sf
Definition speed_features.h:1988
SPEED_FEATURES::inter_sf
INTER_MODE_SPEED_FEATURES inter_sf
Definition speed_features.h:1973
SPEED_FEATURES::rd_sf
RD_CALC_SPEED_FEATURES rd_sf
Definition speed_features.h:1993
SPEED_FEATURES::part_sf
PARTITION_SPEED_FEATURES part_sf
Definition speed_features.h:1963
SPEED_FEATURES::gm_sf
GLOBAL_MOTION_SPEED_FEATURES gm_sf
Definition speed_features.h:1958
SPEED_FEATURES::interp_sf
INTERP_FILTER_SPEED_FEATURES interp_sf
Definition speed_features.h:1978
SPEED_FEATURES::fp_sf
FIRST_PASS_SPEED_FEATURES fp_sf
Definition speed_features.h:1948
SPEED_FEATURES::intra_sf
INTRA_MODE_SPEED_FEATURES intra_sf
Definition speed_features.h:1983
SPEED_FEATURES::winner_mode_sf
WINNER_MODE_SPEED_FEATURES winner_mode_sf
Definition speed_features.h:1998
SPEED_FEATURES::rt_sf
REAL_TIME_SPEED_FEATURES rt_sf
Definition speed_features.h:2008
SPEED_FEATURES::hl_sf
HIGH_LEVEL_SPEED_FEATURES hl_sf
Definition speed_features.h:1943