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| 1 /* |
| 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| 3 * |
| 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. |
| 9 */ |
| 10 |
| 11 #ifndef VP9_ENCODER_VP9_SPEED_FEATURES_H_ |
| 12 #define VP9_ENCODER_VP9_SPEED_FEATURES_H_ |
| 13 |
| 14 #include "vp9/common/vp9_enums.h" |
| 15 |
| 16 #ifdef __cplusplus |
| 17 extern "C" { |
| 18 #endif |
| 19 |
| 20 typedef enum { |
| 21 DIAMOND = 0, |
| 22 NSTEP = 1, |
| 23 HEX = 2, |
| 24 BIGDIA = 3, |
| 25 SQUARE = 4, |
| 26 FAST_HEX = 5, |
| 27 FAST_DIAMOND = 6 |
| 28 } SEARCH_METHODS; |
| 29 |
| 30 typedef enum { |
| 31 // No recode. |
| 32 DISALLOW_RECODE = 0, |
| 33 // Allow recode for KF and exceeding maximum frame bandwidth. |
| 34 ALLOW_RECODE_KFMAXBW = 1, |
| 35 // Allow recode only for KF/ARF/GF frames. |
| 36 ALLOW_RECODE_KFARFGF = 2, |
| 37 // Allow recode for all frames based on bitrate constraints. |
| 38 ALLOW_RECODE = 3, |
| 39 } RECODE_LOOP_TYPE; |
| 40 |
| 41 typedef enum { |
| 42 SUBPEL_TREE = 0, |
| 43 // Other methods to come |
| 44 } SUBPEL_SEARCH_METHODS; |
| 45 |
| 46 typedef enum { |
| 47 LAST_FRAME_PARTITION_OFF = 0, |
| 48 LAST_FRAME_PARTITION_LOW_MOTION = 1, |
| 49 LAST_FRAME_PARTITION_ALL = 2 |
| 50 } LAST_FRAME_PARTITION_METHOD; |
| 51 |
| 52 typedef enum { |
| 53 USE_FULL_RD = 0, |
| 54 USE_LARGESTINTRA, |
| 55 USE_LARGESTINTRA_MODELINTER, |
| 56 USE_LARGESTALL |
| 57 } TX_SIZE_SEARCH_METHOD; |
| 58 |
| 59 typedef enum { |
| 60 NOT_IN_USE = 0, |
| 61 RELAXED_NEIGHBORING_MIN_MAX = 1, |
| 62 STRICT_NEIGHBORING_MIN_MAX = 2 |
| 63 } AUTO_MIN_MAX_MODE; |
| 64 |
| 65 typedef enum { |
| 66 // Try the full image with different values. |
| 67 LPF_PICK_FROM_FULL_IMAGE, |
| 68 // Try a small portion of the image with different values. |
| 69 LPF_PICK_FROM_SUBIMAGE, |
| 70 // Estimate the level based on quantizer and frame type |
| 71 LPF_PICK_FROM_Q, |
| 72 } LPF_PICK_METHOD; |
| 73 |
| 74 typedef enum { |
| 75 // Terminate search early based on distortion so far compared to |
| 76 // qp step, distortion in the neighborhood of the frame, etc. |
| 77 FLAG_EARLY_TERMINATE = 1 << 0, |
| 78 |
| 79 // Skips comp inter modes if the best so far is an intra mode. |
| 80 FLAG_SKIP_COMP_BESTINTRA = 1 << 1, |
| 81 |
| 82 // Skips comp inter modes if the best single intermode so far does |
| 83 // not have the same reference as one of the two references being |
| 84 // tested. |
| 85 FLAG_SKIP_COMP_REFMISMATCH = 1 << 2, |
| 86 |
| 87 // Skips oblique intra modes if the best so far is an inter mode. |
| 88 FLAG_SKIP_INTRA_BESTINTER = 1 << 3, |
| 89 |
| 90 // Skips oblique intra modes at angles 27, 63, 117, 153 if the best |
| 91 // intra so far is not one of the neighboring directions. |
| 92 FLAG_SKIP_INTRA_DIRMISMATCH = 1 << 4, |
| 93 |
| 94 // Skips intra modes other than DC_PRED if the source variance is small |
| 95 FLAG_SKIP_INTRA_LOWVAR = 1 << 5, |
| 96 } MODE_SEARCH_SKIP_LOGIC; |
| 97 |
| 98 typedef enum { |
| 99 // Search partitions using RD/NONRD criterion |
| 100 SEARCH_PARTITION = 0, |
| 101 |
| 102 // Always use a fixed size partition |
| 103 FIXED_PARTITION = 1, |
| 104 |
| 105 // Use a fixed size partition in every 64X64 SB, where the size is |
| 106 // determined based on source variance |
| 107 VAR_BASED_FIXED_PARTITION = 2, |
| 108 |
| 109 REFERENCE_PARTITION = 3, |
| 110 |
| 111 // Use an arbitrary partitioning scheme based on source variance within |
| 112 // a 64X64 SB |
| 113 VAR_BASED_PARTITION, |
| 114 |
| 115 // Use non-fixed partitions based on source variance |
| 116 SOURCE_VAR_BASED_PARTITION |
| 117 } PARTITION_SEARCH_TYPE; |
| 118 |
| 119 typedef enum { |
| 120 // Does a dry run to see if any of the contexts need to be updated or not, |
| 121 // before the final run. |
| 122 TWO_LOOP = 0, |
| 123 |
| 124 // No dry run conducted. |
| 125 ONE_LOOP = 1, |
| 126 |
| 127 // No dry run, also only half the coef contexts and bands are updated. |
| 128 // The rest are not updated at all. |
| 129 ONE_LOOP_REDUCED = 2 |
| 130 } FAST_COEFF_UPDATE; |
| 131 |
| 132 typedef struct { |
| 133 // Frame level coding parameter update |
| 134 int frame_parameter_update; |
| 135 |
| 136 // Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc). |
| 137 SEARCH_METHODS search_method; |
| 138 |
| 139 RECODE_LOOP_TYPE recode_loop; |
| 140 |
| 141 // Subpel_search_method can only be subpel_tree which does a subpixel |
| 142 // logarithmic search that keeps stepping at 1/2 pixel units until |
| 143 // you stop getting a gain, and then goes on to 1/4 and repeats |
| 144 // the same process. Along the way it skips many diagonals. |
| 145 SUBPEL_SEARCH_METHODS subpel_search_method; |
| 146 |
| 147 // Maximum number of steps in logarithmic subpel search before giving up. |
| 148 int subpel_iters_per_step; |
| 149 |
| 150 // Control when to stop subpel search |
| 151 int subpel_force_stop; |
| 152 |
| 153 // This parameter controls the number of steps we'll do in a diamond |
| 154 // search. |
| 155 int max_step_search_steps; |
| 156 |
| 157 // This parameter controls which step in the n-step process we start at. |
| 158 // It's changed adaptively based on circumstances. |
| 159 int reduce_first_step_size; |
| 160 |
| 161 // If this is set to 1, we limit the motion search range to 2 times the |
| 162 // largest motion vector found in the last frame. |
| 163 int auto_mv_step_size; |
| 164 |
| 165 // Trellis (dynamic programming) optimization of quantized values (+1, 0). |
| 166 int optimize_coefficients; |
| 167 |
| 168 // Always set to 0. If on it enables 0 cost background transmission |
| 169 // (except for the initial transmission of the segmentation). The feature is |
| 170 // disabled because the addition of very large block sizes make the |
| 171 // backgrounds very to cheap to encode, and the segmentation we have |
| 172 // adds overhead. |
| 173 int static_segmentation; |
| 174 |
| 175 // If 1 we iterate finding a best reference for 2 ref frames together - via |
| 176 // a log search that iterates 4 times (check around mv for last for best |
| 177 // error of combined predictor then check around mv for alt). If 0 we |
| 178 // we just use the best motion vector found for each frame by itself. |
| 179 int comp_inter_joint_search_thresh; |
| 180 |
| 181 // This variable is used to cap the maximum number of times we skip testing a |
| 182 // mode to be evaluated. A high value means we will be faster. |
| 183 int adaptive_rd_thresh; |
| 184 |
| 185 // Enables skipping the reconstruction step (idct, recon) in the |
| 186 // intermediate steps assuming the last frame didn't have too many intra |
| 187 // blocks and the q is less than a threshold. |
| 188 int skip_encode_sb; |
| 189 int skip_encode_frame; |
| 190 // Speed feature to allow or disallow skipping of recode at block |
| 191 // level within a frame. |
| 192 int allow_skip_recode; |
| 193 |
| 194 // This variable allows us to reuse the last frames partition choices |
| 195 // (64x64 v 32x32 etc) for this frame. It can be set to only use the last |
| 196 // frame as a starting point in low motion scenes or always use it. If set |
| 197 // we use last partitioning_redo frequency to determine how often to redo |
| 198 // the partitioning from scratch. Adjust_partitioning_from_last_frame |
| 199 // enables us to adjust up or down one partitioning from the last frames |
| 200 // partitioning. |
| 201 LAST_FRAME_PARTITION_METHOD use_lastframe_partitioning; |
| 202 |
| 203 // Determine which method we use to determine transform size. We can choose |
| 204 // between options like full rd, largest for prediction size, largest |
| 205 // for intra and model coefs for the rest. |
| 206 TX_SIZE_SEARCH_METHOD tx_size_search_method; |
| 207 |
| 208 // Low precision 32x32 fdct keeps everything in 16 bits and thus is less |
| 209 // precise but significantly faster than the non lp version. |
| 210 int use_lp32x32fdct; |
| 211 |
| 212 // TODO(JBB): remove this as its no longer used. |
| 213 |
| 214 // After looking at the first set of modes (set by index here), skip |
| 215 // checking modes for reference frames that don't match the reference frame |
| 216 // of the best so far. |
| 217 int mode_skip_start; |
| 218 |
| 219 // TODO(JBB): Remove this. |
| 220 int reference_masking; |
| 221 |
| 222 PARTITION_SEARCH_TYPE partition_search_type; |
| 223 |
| 224 // Used if partition_search_type = FIXED_SIZE_PARTITION |
| 225 BLOCK_SIZE always_this_block_size; |
| 226 |
| 227 // Skip rectangular partition test when partition type none gives better |
| 228 // rd than partition type split. |
| 229 int less_rectangular_check; |
| 230 |
| 231 // Disable testing non square partitions. (eg 16x32) |
| 232 int use_square_partition_only; |
| 233 |
| 234 // Sets min and max partition sizes for this 64x64 region based on the |
| 235 // same 64x64 in last encoded frame, and the left and above neighbor. |
| 236 AUTO_MIN_MAX_MODE auto_min_max_partition_size; |
| 237 |
| 238 // Min and max partition size we enable (block_size) as per auto |
| 239 // min max, but also used by adjust partitioning, and pick_partitioning. |
| 240 BLOCK_SIZE min_partition_size; |
| 241 BLOCK_SIZE max_partition_size; |
| 242 |
| 243 // Whether or not we allow partitions one smaller or one greater than the last |
| 244 // frame's partitioning. Only used if use_lastframe_partitioning is set. |
| 245 int adjust_partitioning_from_last_frame; |
| 246 |
| 247 // How frequently we re do the partitioning from scratch. Only used if |
| 248 // use_lastframe_partitioning is set. |
| 249 int last_partitioning_redo_frequency; |
| 250 |
| 251 // This enables constrained copy partitioning, which, given an input block |
| 252 // size bsize, will copy previous partition for partitions less than bsize, |
| 253 // otherwise bsize partition is used. bsize is currently set to 16x16. |
| 254 // Used for the case where motion is detected in superblock. |
| 255 int constrain_copy_partition; |
| 256 |
| 257 // Disables sub 8x8 blocksizes in different scenarios: Choices are to disable |
| 258 // it always, to allow it for only Last frame and Intra, disable it for all |
| 259 // inter modes or to enable it always. |
| 260 int disable_split_mask; |
| 261 |
| 262 // TODO(jingning): combine the related motion search speed features |
| 263 // This allows us to use motion search at other sizes as a starting |
| 264 // point for this motion search and limits the search range around it. |
| 265 int adaptive_motion_search; |
| 266 |
| 267 // Allows sub 8x8 modes to use the prediction filter that was determined |
| 268 // best for 8x8 mode. If set to 0 we always re check all the filters for |
| 269 // sizes less than 8x8, 1 means we check all filter modes if no 8x8 filter |
| 270 // was selected, and 2 means we use 8 tap if no 8x8 filter mode was selected. |
| 271 int adaptive_pred_interp_filter; |
| 272 |
| 273 // Search through variable block partition types in non-RD mode decision |
| 274 // encoding process for RTC. |
| 275 int partition_check; |
| 276 |
| 277 // Use finer quantizer in every other few frames that run variable block |
| 278 // partition type search. |
| 279 int force_frame_boost; |
| 280 |
| 281 // Maximally allowed base quantization index fluctuation. |
| 282 int max_delta_qindex; |
| 283 |
| 284 // Implements various heuristics to skip searching modes |
| 285 // The heuristics selected are based on flags |
| 286 // defined in the MODE_SEARCH_SKIP_HEURISTICS enum |
| 287 unsigned int mode_search_skip_flags; |
| 288 |
| 289 // A source variance threshold below which the split mode is disabled |
| 290 unsigned int disable_split_var_thresh; |
| 291 |
| 292 // A source variance threshold below which filter search is disabled |
| 293 // Choose a very large value (UINT_MAX) to use 8-tap always |
| 294 unsigned int disable_filter_search_var_thresh; |
| 295 |
| 296 // These bit masks allow you to enable or disable intra modes for each |
| 297 // transform size separately. |
| 298 int intra_y_mode_mask[TX_SIZES]; |
| 299 int intra_uv_mode_mask[TX_SIZES]; |
| 300 |
| 301 // This variable enables an early break out of mode testing if the model for |
| 302 // rd built from the prediction signal indicates a value that's much |
| 303 // higher than the best rd we've seen so far. |
| 304 int use_rd_breakout; |
| 305 |
| 306 // This enables us to use an estimate for intra rd based on dc mode rather |
| 307 // than choosing an actual uv mode in the stage of encoding before the actual |
| 308 // final encode. |
| 309 int use_uv_intra_rd_estimate; |
| 310 |
| 311 // This feature controls how the loop filter level is determined. |
| 312 LPF_PICK_METHOD lpf_pick; |
| 313 |
| 314 // This feature limits the number of coefficients updates we actually do |
| 315 // by only looking at counts from 1/2 the bands. |
| 316 FAST_COEFF_UPDATE use_fast_coef_updates; |
| 317 |
| 318 // This flag controls the use of non-RD mode decision. |
| 319 int use_nonrd_pick_mode; |
| 320 |
| 321 // This variable sets the encode_breakout threshold. Currently, it is only |
| 322 // enabled in real time mode. |
| 323 int encode_breakout_thresh; |
| 324 |
| 325 // A binary mask indicating if NEARESTMV, NEARMV, ZEROMV, NEWMV |
| 326 // modes are disabled in order from LSB to MSB for each BLOCK_SIZE. |
| 327 int disable_inter_mode_mask[BLOCK_SIZES]; |
| 328 |
| 329 // This feature controls whether we do the expensive context update and |
| 330 // calculation in the rd coefficient costing loop. |
| 331 int use_fast_coef_costing; |
| 332 |
| 333 // This feature controls the tolerence vs target used in deciding whether to |
| 334 // recode a frame. It has no meaning if recode is disabled. |
| 335 int recode_tolerance; |
| 336 |
| 337 // This variable controls the maximum block size where intra blocks can be |
| 338 // used in inter frames. |
| 339 // TODO(aconverse): Fold this into one of the other many mode skips |
| 340 BLOCK_SIZE max_intra_bsize; |
| 341 |
| 342 // The frequency that we check if SOURCE_VAR_BASED_PARTITION or |
| 343 // FIXED_PARTITION search type should be used. |
| 344 int search_type_check_frequency; |
| 345 |
| 346 // The threshold used in SOURCE_VAR_BASED_PARTITION search type. |
| 347 int source_var_thresh; |
| 348 } SPEED_FEATURES; |
| 349 |
| 350 struct VP9_COMP; |
| 351 |
| 352 void vp9_set_speed_features(struct VP9_COMP *cpi); |
| 353 |
| 354 #ifdef __cplusplus |
| 355 } // extern "C" |
| 356 #endif |
| 357 |
| 358 #endif // VP9_ENCODER_VP9_SPEED_FEATURES_H_ |
| 359 |
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