2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef VP9_ENCODER_VP9_SPEED_FEATURES_H_
12 #define VP9_ENCODER_VP9_SPEED_FEATURES_H_
14 #include "vp9/common/vp9_enums.h"
21 INTRA_ALL = (1 << DC_PRED) |
22 (1 << V_PRED) | (1 << H_PRED) |
23 (1 << D45_PRED) | (1 << D135_PRED) |
24 (1 << D117_PRED) | (1 << D153_PRED) |
25 (1 << D207_PRED) | (1 << D63_PRED) |
27 INTRA_DC = (1 << DC_PRED),
28 INTRA_DC_TM = (1 << DC_PRED) | (1 << TM_PRED),
29 INTRA_DC_H_V = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED),
30 INTRA_DC_TM_H_V = (1 << DC_PRED) | (1 << TM_PRED) | (1 << V_PRED) |
35 INTER_ALL = (1 << NEARESTMV) | (1 << NEARMV) | (1 << ZEROMV) | (1 << NEWMV),
36 INTER_NEAREST = (1 << NEARESTMV),
37 INTER_NEAREST_NEW = (1 << NEARESTMV) | (1 << NEWMV),
38 INTER_NEAREST_ZERO = (1 << NEARESTMV) | (1 << ZEROMV),
39 INTER_NEAREST_NEW_ZERO = (1 << NEARESTMV) | (1 << ZEROMV) | (1 << NEWMV),
40 INTER_NEAREST_NEAR_NEW = (1 << NEARESTMV) | (1 << NEARMV) | (1 << NEWMV),
41 INTER_NEAREST_NEAR_ZERO = (1 << NEARESTMV) | (1 << NEARMV) | (1 << ZEROMV),
45 DISABLE_ALL_INTER_SPLIT = (1 << THR_COMP_GA) |
51 DISABLE_ALL_SPLIT = (1 << THR_INTRA) | DISABLE_ALL_INTER_SPLIT,
53 DISABLE_COMPOUND_SPLIT = (1 << THR_COMP_GA) | (1 << THR_COMP_LA),
55 LAST_AND_INTRA_SPLIT_ONLY = (1 << THR_COMP_GA) |
74 // Allow recode for KF and exceeding maximum frame bandwidth.
75 ALLOW_RECODE_KFMAXBW = 1,
76 // Allow recode only for KF/ARF/GF frames.
77 ALLOW_RECODE_KFARFGF = 2,
78 // Allow recode for all frames based on bitrate constraints.
84 SUBPEL_TREE_PRUNED = 1, // Prunes 1/2-pel searches
85 SUBPEL_TREE_PRUNED_MORE = 2, // Prunes 1/2-pel searches more aggressively
86 SUBPEL_TREE_PRUNED_EVENMORE = 3, // Prunes 1/2- and 1/4-pel searches
87 // Other methods to come
88 } SUBPEL_SEARCH_METHODS;
91 NO_MOTION_THRESHOLD = 0,
92 LOW_MOTION_THRESHOLD = 7
96 LAST_FRAME_PARTITION_OFF = 0,
97 LAST_FRAME_PARTITION_LOW_MOTION = 1,
98 LAST_FRAME_PARTITION_ALL = 2
99 } LAST_FRAME_PARTITION_METHOD;
105 } TX_SIZE_SEARCH_METHOD;
109 RELAXED_NEIGHBORING_MIN_MAX = 1,
110 CONSTRAIN_NEIGHBORING_MIN_MAX = 2,
111 STRICT_NEIGHBORING_MIN_MAX = 3
115 // Try the full image with different values.
116 LPF_PICK_FROM_FULL_IMAGE,
117 // Try a small portion of the image with different values.
118 LPF_PICK_FROM_SUBIMAGE,
119 // Estimate the level based on quantizer and frame type
121 // Pick 0 to disable LPF if LPF was enabled last frame
126 // Terminate search early based on distortion so far compared to
127 // qp step, distortion in the neighborhood of the frame, etc.
128 FLAG_EARLY_TERMINATE = 1 << 0,
130 // Skips comp inter modes if the best so far is an intra mode.
131 FLAG_SKIP_COMP_BESTINTRA = 1 << 1,
133 // Skips oblique intra modes if the best so far is an inter mode.
134 FLAG_SKIP_INTRA_BESTINTER = 1 << 3,
136 // Skips oblique intra modes at angles 27, 63, 117, 153 if the best
137 // intra so far is not one of the neighboring directions.
138 FLAG_SKIP_INTRA_DIRMISMATCH = 1 << 4,
140 // Skips intra modes other than DC_PRED if the source variance is small
141 FLAG_SKIP_INTRA_LOWVAR = 1 << 5,
142 } MODE_SEARCH_SKIP_LOGIC;
145 FLAG_SKIP_EIGHTTAP = 1 << EIGHTTAP,
146 FLAG_SKIP_EIGHTTAP_SMOOTH = 1 << EIGHTTAP_SMOOTH,
147 FLAG_SKIP_EIGHTTAP_SHARP = 1 << EIGHTTAP_SHARP,
148 } INTERP_FILTER_MASK;
151 // Search partitions using RD/NONRD criterion
154 // Always use a fixed size partition
159 // Use an arbitrary partitioning scheme based on source variance within
163 // Use non-fixed partitions based on source variance
164 SOURCE_VAR_BASED_PARTITION
165 } PARTITION_SEARCH_TYPE;
168 // Does a dry run to see if any of the contexts need to be updated or not,
169 // before the final run.
172 // No dry run conducted.
175 // No dry run, also only half the coef contexts and bands are updated.
176 // The rest are not updated at all.
180 typedef struct MV_SPEED_FEATURES {
181 // Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc).
182 SEARCH_METHODS search_method;
184 // This parameter controls which step in the n-step process we start at.
185 // It's changed adaptively based on circumstances.
186 int reduce_first_step_size;
188 // If this is set to 1, we limit the motion search range to 2 times the
189 // largest motion vector found in the last frame.
190 int auto_mv_step_size;
192 // Subpel_search_method can only be subpel_tree which does a subpixel
193 // logarithmic search that keeps stepping at 1/2 pixel units until
194 // you stop getting a gain, and then goes on to 1/4 and repeats
195 // the same process. Along the way it skips many diagonals.
196 SUBPEL_SEARCH_METHODS subpel_search_method;
198 // Maximum number of steps in logarithmic subpel search before giving up.
199 int subpel_iters_per_step;
201 // Control when to stop subpel search
202 int subpel_force_stop;
204 // This variable sets the step_param used in full pel motion search.
205 int fullpel_search_step_param;
208 typedef struct SPEED_FEATURES {
209 MV_SPEED_FEATURES mv;
211 // Frame level coding parameter update
212 int frame_parameter_update;
214 RECODE_LOOP_TYPE recode_loop;
216 // Trellis (dynamic programming) optimization of quantized values (+1, 0).
217 int optimize_coefficients;
219 // Always set to 0. If on it enables 0 cost background transmission
220 // (except for the initial transmission of the segmentation). The feature is
221 // disabled because the addition of very large block sizes make the
222 // backgrounds very to cheap to encode, and the segmentation we have
224 int static_segmentation;
226 // If 1 we iterate finding a best reference for 2 ref frames together - via
227 // a log search that iterates 4 times (check around mv for last for best
228 // error of combined predictor then check around mv for alt). If 0 we
229 // we just use the best motion vector found for each frame by itself.
230 BLOCK_SIZE comp_inter_joint_search_thresh;
232 // This variable is used to cap the maximum number of times we skip testing a
233 // mode to be evaluated. A high value means we will be faster.
234 int adaptive_rd_thresh;
236 // Enables skipping the reconstruction step (idct, recon) in the
237 // intermediate steps assuming the last frame didn't have too many intra
238 // blocks and the q is less than a threshold.
240 int skip_encode_frame;
241 // Speed feature to allow or disallow skipping of recode at block
242 // level within a frame.
243 int allow_skip_recode;
245 // This variable allows us to reuse the last frames partition choices
246 // (64x64 v 32x32 etc) for this frame. It can be set to only use the last
247 // frame as a starting point in low motion scenes or always use it. If set
248 // we use last partitioning_redo frequency to determine how often to redo
249 // the partitioning from scratch. Adjust_partitioning_from_last_frame
250 // enables us to adjust up or down one partitioning from the last frames
252 LAST_FRAME_PARTITION_METHOD use_lastframe_partitioning;
254 // The threshold is to determine how slow the motino is, it is used when
255 // use_lastframe_partitioning is set to LAST_FRAME_PARTITION_LOW_MOTION
256 MOTION_THRESHOLD lf_motion_threshold;
258 // Determine which method we use to determine transform size. We can choose
259 // between options like full rd, largest for prediction size, largest
260 // for intra and model coefs for the rest.
261 TX_SIZE_SEARCH_METHOD tx_size_search_method;
263 // Low precision 32x32 fdct keeps everything in 16 bits and thus is less
264 // precise but significantly faster than the non lp version.
267 // TODO(JBB): remove this as its no longer used.
269 // After looking at the first set of modes (set by index here), skip
270 // checking modes for reference frames that don't match the reference frame
271 // of the best so far.
274 // TODO(JBB): Remove this.
275 int reference_masking;
277 PARTITION_SEARCH_TYPE partition_search_type;
279 // Used if partition_search_type = FIXED_SIZE_PARTITION
280 BLOCK_SIZE always_this_block_size;
282 // Skip rectangular partition test when partition type none gives better
283 // rd than partition type split.
284 int less_rectangular_check;
286 // Disable testing non square partitions. (eg 16x32)
287 int use_square_partition_only;
289 // Sets min and max partition sizes for this 64x64 region based on the
290 // same 64x64 in last encoded frame, and the left and above neighbor.
291 AUTO_MIN_MAX_MODE auto_min_max_partition_size;
293 // Min and max partition size we enable (block_size) as per auto
294 // min max, but also used by adjust partitioning, and pick_partitioning.
295 BLOCK_SIZE min_partition_size;
296 BLOCK_SIZE max_partition_size;
298 // Whether or not we allow partitions one smaller or one greater than the last
299 // frame's partitioning. Only used if use_lastframe_partitioning is set.
300 int adjust_partitioning_from_last_frame;
302 // How frequently we re do the partitioning from scratch. Only used if
303 // use_lastframe_partitioning is set.
304 int last_partitioning_redo_frequency;
306 // This enables constrained copy partitioning, which, given an input block
307 // size bsize, will copy previous partition for partitions less than bsize,
308 // otherwise bsize partition is used. bsize is currently set to 16x16.
309 // Used for the case where motion is detected in superblock.
310 int constrain_copy_partition;
312 // Disables sub 8x8 blocksizes in different scenarios: Choices are to disable
313 // it always, to allow it for only Last frame and Intra, disable it for all
314 // inter modes or to enable it always.
315 int disable_split_mask;
317 // TODO(jingning): combine the related motion search speed features
318 // This allows us to use motion search at other sizes as a starting
319 // point for this motion search and limits the search range around it.
320 int adaptive_motion_search;
322 int schedule_mode_search;
324 // Allows sub 8x8 modes to use the prediction filter that was determined
325 // best for 8x8 mode. If set to 0 we always re check all the filters for
326 // sizes less than 8x8, 1 means we check all filter modes if no 8x8 filter
327 // was selected, and 2 means we use 8 tap if no 8x8 filter mode was selected.
328 int adaptive_pred_interp_filter;
330 // Adaptive prediction mode search
331 int adaptive_mode_search;
333 // Chessboard pattern prediction filter type search
334 int cb_pred_filter_search;
336 int cb_partition_search;
338 int motion_field_mode_search;
340 int alt_ref_search_fp;
342 // Fast quantization process path
345 // Search through variable block partition types in non-RD mode decision
346 // encoding process for RTC.
349 // Use finer quantizer in every other few frames that run variable block
350 // partition type search.
351 int force_frame_boost;
353 // Maximally allowed base quantization index fluctuation.
354 int max_delta_qindex;
356 // Implements various heuristics to skip searching modes
357 // The heuristics selected are based on flags
358 // defined in the MODE_SEARCH_SKIP_HEURISTICS enum
359 unsigned int mode_search_skip_flags;
361 // A source variance threshold below which filter search is disabled
362 // Choose a very large value (UINT_MAX) to use 8-tap always
363 unsigned int disable_filter_search_var_thresh;
365 // These bit masks allow you to enable or disable intra modes for each
366 // transform size separately.
367 int intra_y_mode_mask[TX_SIZES];
368 int intra_uv_mode_mask[TX_SIZES];
370 // This variable enables an early break out of mode testing if the model for
371 // rd built from the prediction signal indicates a value that's much
372 // higher than the best rd we've seen so far.
375 // This enables us to use an estimate for intra rd based on dc mode rather
376 // than choosing an actual uv mode in the stage of encoding before the actual
378 int use_uv_intra_rd_estimate;
380 // This feature controls how the loop filter level is determined.
381 LPF_PICK_METHOD lpf_pick;
383 // This feature limits the number of coefficients updates we actually do
384 // by only looking at counts from 1/2 the bands.
385 FAST_COEFF_UPDATE use_fast_coef_updates;
387 // This flag controls the use of non-RD mode decision.
388 int use_nonrd_pick_mode;
390 // A binary mask indicating if NEARESTMV, NEARMV, ZEROMV, NEWMV
391 // modes are used in order from LSB to MSB for each BLOCK_SIZE.
392 int inter_mode_mask[BLOCK_SIZES];
394 // This feature controls whether we do the expensive context update and
395 // calculation in the rd coefficient costing loop.
396 int use_fast_coef_costing;
398 // This feature controls the tolerence vs target used in deciding whether to
399 // recode a frame. It has no meaning if recode is disabled.
400 int recode_tolerance;
402 // This variable controls the maximum block size where intra blocks can be
403 // used in inter frames.
404 // TODO(aconverse): Fold this into one of the other many mode skips
405 BLOCK_SIZE max_intra_bsize;
407 // The frequency that we check if SOURCE_VAR_BASED_PARTITION or
408 // FIXED_PARTITION search type should be used.
409 int search_type_check_frequency;
411 // When partition is pre-set, the inter prediction result from pick_inter_mode
412 // can be reused in final block encoding process. It is enabled only for real-
413 // time mode speed 6.
414 int reuse_inter_pred_sby;
416 // This variable sets the encode_breakout threshold. Currently, it is only
417 // enabled in real time mode.
418 int encode_breakout_thresh;
420 // In real time encoding, increase the threshold for NEWMV.
421 int elevate_newmv_thresh;
423 // default interp filter choice
424 INTERP_FILTER default_interp_filter;
426 // Early termination in transform size search, which only applies while
427 // tx_size_search_method is USE_FULL_RD.
428 int tx_size_search_breakout;
430 // adaptive interp_filter search to allow skip of certain filter types.
431 int adaptive_interp_filter_search;
433 // mask for skip evaluation of certain interp_filter type.
434 INTERP_FILTER_MASK interp_filter_search_mask;
436 // Partition search early breakout thresholds.
437 int64_t partition_search_breakout_dist_thr;
438 int partition_search_breakout_rate_thr;
440 // Allow skipping partition search for still image frame
441 int allow_partition_search_skip;
446 void vp9_set_speed_features(struct VP9_COMP *cpi);
452 #endif // VP9_ENCODER_VP9_SPEED_FEATURES_H_