1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #include <limits.h>
13 #include <math.h>
14
15 #include "av1/common/seg_common.h"
16 #include "av1/encoder/aq_cyclicrefresh.h"
17 #include "av1/encoder/ratectrl.h"
18 #include "av1/encoder/segmentation.h"
19 #include "aom_dsp/aom_dsp_common.h"
20 #include "aom_ports/system_state.h"
21
av1_cyclic_refresh_alloc(int mi_rows,int mi_cols)22 CYCLIC_REFRESH *av1_cyclic_refresh_alloc(int mi_rows, int mi_cols) {
23 size_t last_coded_q_map_size;
24 CYCLIC_REFRESH *const cr = aom_calloc(1, sizeof(*cr));
25 if (cr == NULL) return NULL;
26
27 cr->map = aom_calloc(mi_rows * mi_cols, sizeof(*cr->map));
28 if (cr->map == NULL) {
29 av1_cyclic_refresh_free(cr);
30 return NULL;
31 }
32 last_coded_q_map_size = mi_rows * mi_cols * sizeof(*cr->last_coded_q_map);
33 cr->last_coded_q_map = aom_malloc(last_coded_q_map_size);
34 if (cr->last_coded_q_map == NULL) {
35 av1_cyclic_refresh_free(cr);
36 return NULL;
37 }
38 assert(MAXQ <= 255);
39 memset(cr->last_coded_q_map, MAXQ, last_coded_q_map_size);
40 cr->avg_frame_low_motion = 0.0;
41 return cr;
42 }
43
av1_cyclic_refresh_free(CYCLIC_REFRESH * cr)44 void av1_cyclic_refresh_free(CYCLIC_REFRESH *cr) {
45 if (cr != NULL) {
46 aom_free(cr->map);
47 aom_free(cr->last_coded_q_map);
48 aom_free(cr);
49 }
50 }
51
52 // Check if this coding block, of size bsize, should be considered for refresh
53 // (lower-qp coding). Decision can be based on various factors, such as
54 // size of the coding block (i.e., below min_block size rejected), coding
55 // mode, and rate/distortion.
candidate_refresh_aq(const CYCLIC_REFRESH * cr,const MB_MODE_INFO * mbmi,int64_t rate,int64_t dist,int bsize)56 static int candidate_refresh_aq(const CYCLIC_REFRESH *cr,
57 const MB_MODE_INFO *mbmi, int64_t rate,
58 int64_t dist, int bsize) {
59 MV mv = mbmi->mv[0].as_mv;
60 // Reject the block for lower-qp coding if projected distortion
61 // is above the threshold, and any of the following is true:
62 // 1) mode uses large mv
63 // 2) mode is an intra-mode
64 // Otherwise accept for refresh.
65 if (dist > cr->thresh_dist_sb &&
66 (mv.row > cr->motion_thresh || mv.row < -cr->motion_thresh ||
67 mv.col > cr->motion_thresh || mv.col < -cr->motion_thresh ||
68 !is_inter_block(mbmi)))
69 return CR_SEGMENT_ID_BASE;
70 else if (bsize >= BLOCK_16X16 && rate < cr->thresh_rate_sb &&
71 is_inter_block(mbmi) && mbmi->mv[0].as_int == 0 &&
72 cr->rate_boost_fac > 10)
73 // More aggressive delta-q for bigger blocks with zero motion.
74 return CR_SEGMENT_ID_BOOST2;
75 else
76 return CR_SEGMENT_ID_BOOST1;
77 }
78
79 // Compute delta-q for the segment.
compute_deltaq(const AV1_COMP * cpi,int q,double rate_factor)80 static int compute_deltaq(const AV1_COMP *cpi, int q, double rate_factor) {
81 const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
82 const RATE_CONTROL *const rc = &cpi->rc;
83 int deltaq =
84 av1_compute_qdelta_by_rate(rc, cpi->common.current_frame.frame_type, q,
85 rate_factor, cpi->common.seq_params.bit_depth);
86 if ((-deltaq) > cr->max_qdelta_perc * q / 100) {
87 deltaq = -cr->max_qdelta_perc * q / 100;
88 }
89 return deltaq;
90 }
91
92 // For the just encoded frame, estimate the bits, incorporating the delta-q
93 // from non-base segment. For now ignore effect of multiple segments
94 // (with different delta-q). Note this function is called in the postencode
95 // (called from rc_update_rate_correction_factors()).
av1_cyclic_refresh_estimate_bits_at_q(const AV1_COMP * cpi,double correction_factor)96 int av1_cyclic_refresh_estimate_bits_at_q(const AV1_COMP *cpi,
97 double correction_factor) {
98 const AV1_COMMON *const cm = &cpi->common;
99 const FRAME_TYPE frame_type = cm->current_frame.frame_type;
100 const int base_qindex = cm->quant_params.base_qindex;
101 const int bit_depth = cm->seq_params.bit_depth;
102 const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
103 const int mbs = cm->mi_params.MBs;
104 const int num4x4bl = mbs << 4;
105 // Weight for non-base segments: use actual number of blocks refreshed in
106 // previous/just encoded frame. Note number of blocks here is in 4x4 units.
107 const double weight_segment1 = (double)cr->actual_num_seg1_blocks / num4x4bl;
108 const double weight_segment2 = (double)cr->actual_num_seg2_blocks / num4x4bl;
109 // Take segment weighted average for estimated bits.
110 const int estimated_bits =
111 (int)((1.0 - weight_segment1 - weight_segment2) *
112 av1_estimate_bits_at_q(frame_type, base_qindex, mbs,
113 correction_factor, bit_depth) +
114 weight_segment1 * av1_estimate_bits_at_q(
115 frame_type, base_qindex + cr->qindex_delta[1],
116 mbs, correction_factor, bit_depth) +
117 weight_segment2 * av1_estimate_bits_at_q(
118 frame_type, base_qindex + cr->qindex_delta[2],
119 mbs, correction_factor, bit_depth));
120 return estimated_bits;
121 }
122
123 // Prior to encoding the frame, estimate the bits per mb, for a given q = i and
124 // a corresponding delta-q (for segment 1). This function is called in the
125 // rc_regulate_q() to set the base qp index.
126 // Note: the segment map is set to either 0/CR_SEGMENT_ID_BASE (no refresh) or
127 // to 1/CR_SEGMENT_ID_BOOST1 (refresh) for each superblock, prior to encoding.
av1_cyclic_refresh_rc_bits_per_mb(const AV1_COMP * cpi,int i,double correction_factor)128 int av1_cyclic_refresh_rc_bits_per_mb(const AV1_COMP *cpi, int i,
129 double correction_factor) {
130 const AV1_COMMON *const cm = &cpi->common;
131 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
132 int bits_per_mb;
133 int num4x4bl = cm->mi_params.MBs << 4;
134 // Weight for segment prior to encoding: take the average of the target
135 // number for the frame to be encoded and the actual from the previous frame.
136 double weight_segment =
137 (double)((cr->target_num_seg_blocks + cr->actual_num_seg1_blocks +
138 cr->actual_num_seg2_blocks) >>
139 1) /
140 num4x4bl;
141 // Compute delta-q corresponding to qindex i.
142 int deltaq = compute_deltaq(cpi, i, cr->rate_ratio_qdelta);
143 // Take segment weighted average for bits per mb.
144 bits_per_mb =
145 (int)((1.0 - weight_segment) *
146 av1_rc_bits_per_mb(cm->current_frame.frame_type, i,
147 correction_factor,
148 cm->seq_params.bit_depth) +
149 weight_segment * av1_rc_bits_per_mb(cm->current_frame.frame_type,
150 i + deltaq, correction_factor,
151 cm->seq_params.bit_depth));
152 return bits_per_mb;
153 }
154
155 // Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
156 // check if we should reset the segment_id, and update the cyclic_refresh map
157 // and segmentation map.
av1_cyclic_refresh_update_segment(const AV1_COMP * cpi,MB_MODE_INFO * const mbmi,int mi_row,int mi_col,BLOCK_SIZE bsize,int64_t rate,int64_t dist,int skip)158 void av1_cyclic_refresh_update_segment(const AV1_COMP *cpi,
159 MB_MODE_INFO *const mbmi, int mi_row,
160 int mi_col, BLOCK_SIZE bsize,
161 int64_t rate, int64_t dist, int skip) {
162 const AV1_COMMON *const cm = &cpi->common;
163 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
164 const int bw = mi_size_wide[bsize];
165 const int bh = mi_size_high[bsize];
166 const int xmis = AOMMIN(cm->mi_params.mi_cols - mi_col, bw);
167 const int ymis = AOMMIN(cm->mi_params.mi_rows - mi_row, bh);
168 const int block_index = mi_row * cm->mi_params.mi_cols + mi_col;
169 const int refresh_this_block =
170 candidate_refresh_aq(cr, mbmi, rate, dist, bsize);
171 // Default is to not update the refresh map.
172 int new_map_value = cr->map[block_index];
173
174 // If this block is labeled for refresh, check if we should reset the
175 // segment_id.
176 if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
177 mbmi->segment_id = refresh_this_block;
178 // Reset segment_id if will be skipped.
179 if (skip) mbmi->segment_id = CR_SEGMENT_ID_BASE;
180 }
181
182 // Update the cyclic refresh map, to be used for setting segmentation map
183 // for the next frame. If the block will be refreshed this frame, mark it
184 // as clean. The magnitude of the -ve influences how long before we consider
185 // it for refresh again.
186 if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
187 new_map_value = -cr->time_for_refresh;
188 } else if (refresh_this_block) {
189 // Else if it is accepted as candidate for refresh, and has not already
190 // been refreshed (marked as 1) then mark it as a candidate for cleanup
191 // for future time (marked as 0), otherwise don't update it.
192 if (cr->map[block_index] == 1) new_map_value = 0;
193 } else {
194 // Leave it marked as block that is not candidate for refresh.
195 new_map_value = 1;
196 }
197
198 // Update entries in the cyclic refresh map with new_map_value, and
199 // copy mbmi->segment_id into global segmentation map.
200 for (int y = 0; y < ymis; y++)
201 for (int x = 0; x < xmis; x++) {
202 int map_offset = block_index + y * cm->mi_params.mi_cols + x;
203 cr->map[map_offset] = new_map_value;
204 cpi->enc_seg.map[map_offset] = mbmi->segment_id;
205 }
206 }
207
208 // Update the some stats after encode frame is done.
av1_cyclic_refresh_postencode(AV1_COMP * const cpi)209 void av1_cyclic_refresh_postencode(AV1_COMP *const cpi) {
210 AV1_COMMON *const cm = &cpi->common;
211 const CommonModeInfoParams *const mi_params = &cm->mi_params;
212 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
213 unsigned char *const seg_map = cpi->enc_seg.map;
214 cr->cnt_zeromv = 0;
215 cr->actual_num_seg1_blocks = 0;
216 cr->actual_num_seg2_blocks = 0;
217 for (int mi_row = 0; mi_row < mi_params->mi_rows; mi_row++) {
218 for (int mi_col = 0; mi_col < mi_params->mi_cols; mi_col++) {
219 MB_MODE_INFO **mi =
220 mi_params->mi_grid_base + mi_row * mi_params->mi_stride + mi_col;
221 MV mv = mi[0]->mv[0].as_mv;
222 if (cm->seg.enabled) {
223 int map_index = mi_row * mi_params->mi_cols + mi_col;
224 if (cyclic_refresh_segment_id(seg_map[map_index]) ==
225 CR_SEGMENT_ID_BOOST1)
226 cr->actual_num_seg1_blocks++;
227 else if (cyclic_refresh_segment_id(seg_map[map_index]) ==
228 CR_SEGMENT_ID_BOOST2)
229 cr->actual_num_seg2_blocks++;
230 }
231 // Accumulate low_content_frame.
232 if (is_inter_block(mi[0]) && abs(mv.row) < 16 && abs(mv.col) < 16)
233 cr->cnt_zeromv++;
234 }
235 }
236 cr->cnt_zeromv =
237 100 * cr->cnt_zeromv / (mi_params->mi_rows * mi_params->mi_cols);
238 cr->avg_frame_low_motion =
239 (3 * cr->avg_frame_low_motion + (double)cr->cnt_zeromv) / 4;
240 }
241
242 // Set golden frame update interval, for 1 pass CBR mode.
av1_cyclic_refresh_set_golden_update(AV1_COMP * const cpi)243 void av1_cyclic_refresh_set_golden_update(AV1_COMP *const cpi) {
244 RATE_CONTROL *const rc = &cpi->rc;
245 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
246 // Set minimum gf_interval for GF update to a multiple of the refresh period,
247 // with some max limit. Depending on past encoding stats, GF flag may be
248 // reset and update may not occur until next baseline_gf_interval.
249 if (cr->percent_refresh > 0)
250 rc->baseline_gf_interval = AOMMIN(2 * (100 / cr->percent_refresh), 40);
251 else
252 rc->baseline_gf_interval = 20;
253 if (cr->avg_frame_low_motion < 40) rc->baseline_gf_interval = 8;
254 }
255
256 // Update the segmentation map, and related quantities: cyclic refresh map,
257 // refresh sb_index, and target number of blocks to be refreshed.
258 // The map is set to either 0/CR_SEGMENT_ID_BASE (no refresh) or to
259 // 1/CR_SEGMENT_ID_BOOST1 (refresh) for each superblock.
260 // Blocks labeled as BOOST1 may later get set to BOOST2 (during the
261 // encoding of the superblock).
cyclic_refresh_update_map(AV1_COMP * const cpi)262 static void cyclic_refresh_update_map(AV1_COMP *const cpi) {
263 AV1_COMMON *const cm = &cpi->common;
264 const CommonModeInfoParams *const mi_params = &cm->mi_params;
265 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
266 unsigned char *const seg_map = cpi->enc_seg.map;
267 int i, block_count, bl_index, sb_rows, sb_cols, sbs_in_frame;
268 int xmis, ymis, x, y;
269 memset(seg_map, CR_SEGMENT_ID_BASE, mi_params->mi_rows * mi_params->mi_cols);
270 sb_cols = (mi_params->mi_cols + cm->seq_params.mib_size - 1) /
271 cm->seq_params.mib_size;
272 sb_rows = (mi_params->mi_rows + cm->seq_params.mib_size - 1) /
273 cm->seq_params.mib_size;
274 sbs_in_frame = sb_cols * sb_rows;
275 // Number of target blocks to get the q delta (segment 1).
276 block_count =
277 cr->percent_refresh * mi_params->mi_rows * mi_params->mi_cols / 100;
278 // Set the segmentation map: cycle through the superblocks, starting at
279 // cr->mb_index, and stopping when either block_count blocks have been found
280 // to be refreshed, or we have passed through whole frame.
281 if (cr->sb_index >= sbs_in_frame) cr->sb_index = 0;
282 assert(cr->sb_index < sbs_in_frame);
283 i = cr->sb_index;
284 cr->target_num_seg_blocks = 0;
285 do {
286 int sum_map = 0;
287 // Get the mi_row/mi_col corresponding to superblock index i.
288 int sb_row_index = (i / sb_cols);
289 int sb_col_index = i - sb_row_index * sb_cols;
290 int mi_row = sb_row_index * cm->seq_params.mib_size;
291 int mi_col = sb_col_index * cm->seq_params.mib_size;
292 // TODO(any): Ensure the population of
293 // cpi->common.features.allow_screen_content_tools and use the same instead
294 // of cpi->oxcf.content == AOM_CONTENT_SCREEN
295 int qindex_thresh = cpi->oxcf.content == AOM_CONTENT_SCREEN
296 ? av1_get_qindex(&cm->seg, CR_SEGMENT_ID_BOOST2,
297 cm->quant_params.base_qindex)
298 : 0;
299 assert(mi_row >= 0 && mi_row < mi_params->mi_rows);
300 assert(mi_col >= 0 && mi_col < mi_params->mi_cols);
301 bl_index = mi_row * mi_params->mi_cols + mi_col;
302 // Loop through all MI blocks in superblock and update map.
303 xmis = AOMMIN(mi_params->mi_cols - mi_col, cm->seq_params.mib_size);
304 ymis = AOMMIN(mi_params->mi_rows - mi_row, cm->seq_params.mib_size);
305 for (y = 0; y < ymis; y++) {
306 for (x = 0; x < xmis; x++) {
307 const int bl_index2 = bl_index + y * mi_params->mi_cols + x;
308 // If the block is as a candidate for clean up then mark it
309 // for possible boost/refresh (segment 1). The segment id may get
310 // reset to 0 later if block gets coded anything other than GLOBALMV.
311 if (cr->map[bl_index2] == 0) {
312 if (cr->last_coded_q_map[bl_index2] > qindex_thresh) sum_map++;
313 } else if (cr->map[bl_index2] < 0) {
314 cr->map[bl_index2]++;
315 }
316 }
317 }
318 // Enforce constant segment over superblock.
319 // If segment is at least half of superblock, set to 1.
320 if (sum_map >= xmis * ymis / 2) {
321 for (y = 0; y < ymis; y++)
322 for (x = 0; x < xmis; x++) {
323 seg_map[bl_index + y * mi_params->mi_cols + x] = CR_SEGMENT_ID_BOOST1;
324 }
325 cr->target_num_seg_blocks += xmis * ymis;
326 }
327 i++;
328 if (i == sbs_in_frame) {
329 i = 0;
330 }
331 } while (cr->target_num_seg_blocks < block_count && i != cr->sb_index);
332 cr->sb_index = i;
333 }
334
335 // Set cyclic refresh parameters.
av1_cyclic_refresh_update_parameters(AV1_COMP * const cpi)336 void av1_cyclic_refresh_update_parameters(AV1_COMP *const cpi) {
337 // TODO(marpan): Parameters need to be tuned.
338 const RATE_CONTROL *const rc = &cpi->rc;
339 const AV1_COMMON *const cm = &cpi->common;
340 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
341 int num4x4bl = cm->mi_params.MBs << 4;
342 int target_refresh = 0;
343 double weight_segment_target = 0;
344 double weight_segment = 0;
345 int qp_thresh = AOMMIN(20, rc->best_quality << 1);
346 int qp_max_thresh = 118 * MAXQ >> 7;
347 cr->apply_cyclic_refresh = 1;
348 if (frame_is_intra_only(cm) || is_lossless_requested(&cpi->oxcf) ||
349 cpi->svc.temporal_layer_id > 0 ||
350 rc->avg_frame_qindex[INTER_FRAME] < qp_thresh ||
351 (rc->frames_since_key > 20 &&
352 rc->avg_frame_qindex[INTER_FRAME] > qp_max_thresh) ||
353 (cr->avg_frame_low_motion < 45 && rc->frames_since_key > 40)) {
354 cr->apply_cyclic_refresh = 0;
355 return;
356 }
357 cr->percent_refresh = 10;
358 cr->max_qdelta_perc = 60;
359 cr->time_for_refresh = 0;
360 cr->motion_thresh = 32;
361 cr->rate_boost_fac = 15;
362 // Use larger delta-qp (increase rate_ratio_qdelta) for first few (~4)
363 // periods of the refresh cycle, after a key frame.
364 // Account for larger interval on base layer for temporal layers.
365 if (cr->percent_refresh > 0 &&
366 rc->frames_since_key < 400 / cr->percent_refresh) {
367 cr->rate_ratio_qdelta = 3.0;
368 } else {
369 cr->rate_ratio_qdelta = 2.0;
370 }
371 // Adjust some parameters for low resolutions.
372 if (cm->width * cm->height <= 352 * 288) {
373 if (rc->avg_frame_bandwidth < 3000) {
374 cr->motion_thresh = 16;
375 cr->rate_boost_fac = 13;
376 } else {
377 cr->max_qdelta_perc = 70;
378 cr->rate_ratio_qdelta = AOMMAX(cr->rate_ratio_qdelta, 2.5);
379 }
380 }
381 if (cpi->oxcf.rc_mode == AOM_VBR) {
382 // To be adjusted for VBR mode, e.g., based on gf period and boost.
383 // For now use smaller qp-delta (than CBR), no second boosted seg, and
384 // turn-off (no refresh) on golden refresh (since it's already boosted).
385 cr->percent_refresh = 10;
386 cr->rate_ratio_qdelta = 1.5;
387 cr->rate_boost_fac = 10;
388 if (cpi->refresh_golden_frame == 1) {
389 cr->percent_refresh = 0;
390 cr->rate_ratio_qdelta = 1.0;
391 }
392 }
393 // Weight for segment prior to encoding: take the average of the target
394 // number for the frame to be encoded and the actual from the previous frame.
395 // Use the target if its less. To be used for setting the base qp for the
396 // frame in av1_rc_regulate_q.
397 target_refresh =
398 cr->percent_refresh * cm->mi_params.mi_rows * cm->mi_params.mi_cols / 100;
399 weight_segment_target = (double)(target_refresh) / num4x4bl;
400 weight_segment = (double)((target_refresh + cr->actual_num_seg1_blocks +
401 cr->actual_num_seg2_blocks) >>
402 1) /
403 num4x4bl;
404 if (weight_segment_target < 7 * weight_segment / 8)
405 weight_segment = weight_segment_target;
406 cr->weight_segment = weight_segment;
407 }
408
409 // Setup cyclic background refresh: set delta q and segmentation map.
av1_cyclic_refresh_setup(AV1_COMP * const cpi)410 void av1_cyclic_refresh_setup(AV1_COMP *const cpi) {
411 AV1_COMMON *const cm = &cpi->common;
412 const RATE_CONTROL *const rc = &cpi->rc;
413 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
414 struct segmentation *const seg = &cm->seg;
415 int resolution_change =
416 cm->prev_frame && (cm->width != cm->prev_frame->width ||
417 cm->height != cm->prev_frame->height);
418 if (resolution_change) av1_cyclic_refresh_reset_resize(cpi);
419 if (cm->current_frame.frame_number == 0) cr->low_content_avg = 0.0;
420 if (!cr->apply_cyclic_refresh) {
421 // Set segmentation map to 0 and disable.
422 unsigned char *const seg_map = cpi->enc_seg.map;
423 memset(seg_map, 0, cm->mi_params.mi_rows * cm->mi_params.mi_cols);
424 av1_disable_segmentation(&cm->seg);
425 if (cm->current_frame.frame_type == KEY_FRAME) {
426 memset(cr->last_coded_q_map, MAXQ,
427 cm->mi_params.mi_rows * cm->mi_params.mi_cols *
428 sizeof(*cr->last_coded_q_map));
429 cr->sb_index = 0;
430 }
431 return;
432 } else {
433 const double q = av1_convert_qindex_to_q(cm->quant_params.base_qindex,
434 cm->seq_params.bit_depth);
435 aom_clear_system_state();
436 // Set rate threshold to some multiple (set to 2 for now) of the target
437 // rate (target is given by sb64_target_rate and scaled by 256).
438 cr->thresh_rate_sb = ((int64_t)(rc->sb64_target_rate) << 8) << 2;
439 // Distortion threshold, quadratic in Q, scale factor to be adjusted.
440 // q will not exceed 457, so (q * q) is within 32bit; see:
441 // av1_convert_qindex_to_q(), av1_ac_quant(), ac_qlookup*[].
442 cr->thresh_dist_sb = ((int64_t)(q * q)) << 2;
443
444 // Set up segmentation.
445 // Clear down the segment map.
446 av1_enable_segmentation(&cm->seg);
447 av1_clearall_segfeatures(seg);
448
449 // Note: setting temporal_update has no effect, as the seg-map coding method
450 // (temporal or spatial) is determined in
451 // av1_choose_segmap_coding_method(),
452 // based on the coding cost of each method. For error_resilient mode on the
453 // last_frame_seg_map is set to 0, so if temporal coding is used, it is
454 // relative to 0 previous map.
455 // seg->temporal_update = 0;
456
457 // Segment BASE "Q" feature is disabled so it defaults to the baseline Q.
458 av1_disable_segfeature(seg, CR_SEGMENT_ID_BASE, SEG_LVL_ALT_Q);
459 // Use segment BOOST1 for in-frame Q adjustment.
460 av1_enable_segfeature(seg, CR_SEGMENT_ID_BOOST1, SEG_LVL_ALT_Q);
461 // Use segment BOOST2 for more aggressive in-frame Q adjustment.
462 av1_enable_segfeature(seg, CR_SEGMENT_ID_BOOST2, SEG_LVL_ALT_Q);
463
464 // Set the q delta for segment BOOST1.
465 const CommonQuantParams *const quant_params = &cm->quant_params;
466 int qindex_delta =
467 compute_deltaq(cpi, quant_params->base_qindex, cr->rate_ratio_qdelta);
468 cr->qindex_delta[1] = qindex_delta;
469
470 // Compute rd-mult for segment BOOST1.
471 const int qindex2 = clamp(
472 quant_params->base_qindex + quant_params->y_dc_delta_q + qindex_delta,
473 0, MAXQ);
474 cr->rdmult = av1_compute_rd_mult(cpi, qindex2);
475
476 av1_set_segdata(seg, CR_SEGMENT_ID_BOOST1, SEG_LVL_ALT_Q, qindex_delta);
477
478 // Set a more aggressive (higher) q delta for segment BOOST2.
479 qindex_delta = compute_deltaq(
480 cpi, quant_params->base_qindex,
481 AOMMIN(CR_MAX_RATE_TARGET_RATIO,
482 0.1 * cr->rate_boost_fac * cr->rate_ratio_qdelta));
483 cr->qindex_delta[2] = qindex_delta;
484 av1_set_segdata(seg, CR_SEGMENT_ID_BOOST2, SEG_LVL_ALT_Q, qindex_delta);
485
486 // Update the segmentation and refresh map.
487 cyclic_refresh_update_map(cpi);
488 }
489 }
490
av1_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH * cr)491 int av1_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr) {
492 return cr->rdmult;
493 }
494
av1_cyclic_refresh_reset_resize(AV1_COMP * const cpi)495 void av1_cyclic_refresh_reset_resize(AV1_COMP *const cpi) {
496 const AV1_COMMON *const cm = &cpi->common;
497 CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
498 memset(cr->map, 0, cm->mi_params.mi_rows * cm->mi_params.mi_cols);
499 cr->sb_index = 0;
500 cpi->refresh_golden_frame = 1;
501 }
502