1233d2500723e5594f3e7c70896ffeeef32b9c950ywan/* 2233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Copyright (c) 2014 The WebM project authors. All Rights Reserved. 3233d2500723e5594f3e7c70896ffeeef32b9c950ywan * 4233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Use of this source code is governed by a BSD-style license 5233d2500723e5594f3e7c70896ffeeef32b9c950ywan * that can be found in the LICENSE file in the root of the source 6233d2500723e5594f3e7c70896ffeeef32b9c950ywan * tree. An additional intellectual property rights grant can be found 7233d2500723e5594f3e7c70896ffeeef32b9c950ywan * in the file PATENTS. All contributing project authors may 8233d2500723e5594f3e7c70896ffeeef32b9c950ywan * be found in the AUTHORS file in the root of the source tree. 9233d2500723e5594f3e7c70896ffeeef32b9c950ywan */ 10233d2500723e5594f3e7c70896ffeeef32b9c950ywan 11233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include <limits.h> 12233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include <math.h> 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/encoder/vp9_aq_cyclicrefresh.h" 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/common/vp9_seg_common.h" 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/encoder/vp9_ratectrl.h" 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/encoder/vp9_rdopt.h" 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/encoder/vp9_segmentation.h" 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan 22233d2500723e5594f3e7c70896ffeeef32b9c950ywanstruct CYCLIC_REFRESH { 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Percentage of super-blocks per frame that are targeted as candidates 24233d2500723e5594f3e7c70896ffeeef32b9c950ywan // for cyclic refresh. 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan int max_sbs_perframe; 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Maximum q-delta as percentage of base q. 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan int max_qdelta_perc; 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Block size below which we don't apply cyclic refresh. 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan BLOCK_SIZE min_block_size; 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Superblock starting index for cycling through the frame. 31233d2500723e5594f3e7c70896ffeeef32b9c950ywan int sb_index; 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Controls how long a block will need to wait to be refreshed again. 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan int time_for_refresh; 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Actual number of (8x8) blocks that were applied delta-q (segment 1). 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan int num_seg_blocks; 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Actual encoding bits for segment 1. 37233d2500723e5594f3e7c70896ffeeef32b9c950ywan int actual_seg_bits; 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan // RD mult. parameters for segment 1. 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan int rdmult; 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Cyclic refresh map. 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan signed char *map; 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Projected rate and distortion for the current superblock. 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan int64_t projected_rate_sb; 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan int64_t projected_dist_sb; 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Thresholds applied to projected rate/distortion of the superblock. 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan int64_t thresh_rate_sb; 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan int64_t thresh_dist_sb; 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan}; 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan 50233d2500723e5594f3e7c70896ffeeef32b9c950ywanCYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols) { 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan CYCLIC_REFRESH *const cr = vpx_calloc(1, sizeof(*cr)); 52233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cr == NULL) 53233d2500723e5594f3e7c70896ffeeef32b9c950ywan return NULL; 54233d2500723e5594f3e7c70896ffeeef32b9c950ywan 55233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->map = vpx_calloc(mi_rows * mi_cols, sizeof(*cr->map)); 56233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cr->map == NULL) { 57233d2500723e5594f3e7c70896ffeeef32b9c950ywan vpx_free(cr); 58233d2500723e5594f3e7c70896ffeeef32b9c950ywan return NULL; 59233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 60233d2500723e5594f3e7c70896ffeeef32b9c950ywan 61233d2500723e5594f3e7c70896ffeeef32b9c950ywan return cr; 62233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 63233d2500723e5594f3e7c70896ffeeef32b9c950ywan 64233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr) { 65233d2500723e5594f3e7c70896ffeeef32b9c950ywan vpx_free(cr->map); 66233d2500723e5594f3e7c70896ffeeef32b9c950ywan vpx_free(cr); 67233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 68233d2500723e5594f3e7c70896ffeeef32b9c950ywan 69233d2500723e5594f3e7c70896ffeeef32b9c950ywan// Check if we should turn off cyclic refresh based on bitrate condition. 70233d2500723e5594f3e7c70896ffeeef32b9c950ywanstatic int apply_cyclic_refresh_bitrate(const VP9_COMMON *cm, 71233d2500723e5594f3e7c70896ffeeef32b9c950ywan const RATE_CONTROL *rc) { 72233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Turn off cyclic refresh if bits available per frame is not sufficiently 73233d2500723e5594f3e7c70896ffeeef32b9c950ywan // larger than bit cost of segmentation. Segment map bit cost should scale 74233d2500723e5594f3e7c70896ffeeef32b9c950ywan // with number of seg blocks, so compare available bits to number of blocks. 75233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Average bits available per frame = av_per_frame_bandwidth 76233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Number of (8x8) blocks in frame = mi_rows * mi_cols; 77233d2500723e5594f3e7c70896ffeeef32b9c950ywan const float factor = 0.5; 78233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int number_blocks = cm->mi_rows * cm->mi_cols; 79233d2500723e5594f3e7c70896ffeeef32b9c950ywan // The condition below corresponds to turning off at target bitrates: 80233d2500723e5594f3e7c70896ffeeef32b9c950ywan // ~24kbps for CIF, 72kbps for VGA (at 30fps). 81233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Also turn off at very small frame sizes, to avoid too large fraction of 82233d2500723e5594f3e7c70896ffeeef32b9c950ywan // superblocks to be refreshed per frame. Threshold below is less than QCIF. 83233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (rc->av_per_frame_bandwidth < factor * number_blocks || 84233d2500723e5594f3e7c70896ffeeef32b9c950ywan number_blocks / 64 < 5) 85233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 0; 86233d2500723e5594f3e7c70896ffeeef32b9c950ywan else 87233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 1; 88233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 89233d2500723e5594f3e7c70896ffeeef32b9c950ywan 90233d2500723e5594f3e7c70896ffeeef32b9c950ywan// Check if this coding block, of size bsize, should be considered for refresh 91233d2500723e5594f3e7c70896ffeeef32b9c950ywan// (lower-qp coding). Decision can be based on various factors, such as 92233d2500723e5594f3e7c70896ffeeef32b9c950ywan// size of the coding block (i.e., below min_block size rejected), coding 93233d2500723e5594f3e7c70896ffeeef32b9c950ywan// mode, and rate/distortion. 94233d2500723e5594f3e7c70896ffeeef32b9c950ywanstatic int candidate_refresh_aq(const CYCLIC_REFRESH *cr, 95233d2500723e5594f3e7c70896ffeeef32b9c950ywan const MB_MODE_INFO *mbmi, 96233d2500723e5594f3e7c70896ffeeef32b9c950ywan BLOCK_SIZE bsize, int use_rd) { 97233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (use_rd) { 98233d2500723e5594f3e7c70896ffeeef32b9c950ywan // If projected rate is below the thresh_rate (well below target, 99233d2500723e5594f3e7c70896ffeeef32b9c950ywan // so undershoot expected), accept it for lower-qp coding. 100233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cr->projected_rate_sb < cr->thresh_rate_sb) 101233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 1; 102233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Otherwise, reject the block for lower-qp coding if any of the following: 103233d2500723e5594f3e7c70896ffeeef32b9c950ywan // 1) prediction block size is below min_block_size 104233d2500723e5594f3e7c70896ffeeef32b9c950ywan // 2) mode is non-zero mv and projected distortion is above thresh_dist 105233d2500723e5594f3e7c70896ffeeef32b9c950ywan // 3) mode is an intra-mode (we may want to allow some of this under 106233d2500723e5594f3e7c70896ffeeef32b9c950ywan // another thresh_dist) 107233d2500723e5594f3e7c70896ffeeef32b9c950ywan else if (bsize < cr->min_block_size || 108233d2500723e5594f3e7c70896ffeeef32b9c950ywan (mbmi->mv[0].as_int != 0 && 109233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->projected_dist_sb > cr->thresh_dist_sb) || 110233d2500723e5594f3e7c70896ffeeef32b9c950ywan !is_inter_block(mbmi)) 111233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 0; 112233d2500723e5594f3e7c70896ffeeef32b9c950ywan else 113233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 1; 114233d2500723e5594f3e7c70896ffeeef32b9c950ywan } else { 115233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Rate/distortion not used for update. 116233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (bsize < cr->min_block_size || 117233d2500723e5594f3e7c70896ffeeef32b9c950ywan mbmi->mv[0].as_int != 0 || 118233d2500723e5594f3e7c70896ffeeef32b9c950ywan !is_inter_block(mbmi)) 119233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 0; 120233d2500723e5594f3e7c70896ffeeef32b9c950ywan else 121233d2500723e5594f3e7c70896ffeeef32b9c950ywan return 1; 122233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 123233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 124233d2500723e5594f3e7c70896ffeeef32b9c950ywan 125233d2500723e5594f3e7c70896ffeeef32b9c950ywan// Prior to coding a given prediction block, of size bsize at (mi_row, mi_col), 126233d2500723e5594f3e7c70896ffeeef32b9c950ywan// check if we should reset the segment_id, and update the cyclic_refresh map 127233d2500723e5594f3e7c70896ffeeef32b9c950ywan// and segmentation map. 128233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_cyclic_refresh_update_segment(VP9_COMP *const cpi, 129233d2500723e5594f3e7c70896ffeeef32b9c950ywan MB_MODE_INFO *const mbmi, 130233d2500723e5594f3e7c70896ffeeef32b9c950ywan int mi_row, int mi_col, 131233d2500723e5594f3e7c70896ffeeef32b9c950ywan BLOCK_SIZE bsize, int use_rd) { 132233d2500723e5594f3e7c70896ffeeef32b9c950ywan const VP9_COMMON *const cm = &cpi->common; 133233d2500723e5594f3e7c70896ffeeef32b9c950ywan CYCLIC_REFRESH *const cr = cpi->cyclic_refresh; 134233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int bw = num_8x8_blocks_wide_lookup[bsize]; 135233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int bh = num_8x8_blocks_high_lookup[bsize]; 136233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int xmis = MIN(cm->mi_cols - mi_col, bw); 137233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int ymis = MIN(cm->mi_rows - mi_row, bh); 138233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int block_index = mi_row * cm->mi_cols + mi_col; 139233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int refresh_this_block = candidate_refresh_aq(cr, mbmi, bsize, use_rd); 140233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Default is to not update the refresh map. 141233d2500723e5594f3e7c70896ffeeef32b9c950ywan int new_map_value = cr->map[block_index]; 142233d2500723e5594f3e7c70896ffeeef32b9c950ywan int x = 0; int y = 0; 143233d2500723e5594f3e7c70896ffeeef32b9c950ywan 144233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Check if we should reset the segment_id for this block. 145233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (mbmi->segment_id > 0 && !refresh_this_block) 146233d2500723e5594f3e7c70896ffeeef32b9c950ywan mbmi->segment_id = 0; 147233d2500723e5594f3e7c70896ffeeef32b9c950ywan 148233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Update the cyclic refresh map, to be used for setting segmentation map 149233d2500723e5594f3e7c70896ffeeef32b9c950ywan // for the next frame. If the block will be refreshed this frame, mark it 150233d2500723e5594f3e7c70896ffeeef32b9c950ywan // as clean. The magnitude of the -ve influences how long before we consider 151233d2500723e5594f3e7c70896ffeeef32b9c950ywan // it for refresh again. 152233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (mbmi->segment_id == 1) { 153233d2500723e5594f3e7c70896ffeeef32b9c950ywan new_map_value = -cr->time_for_refresh; 154233d2500723e5594f3e7c70896ffeeef32b9c950ywan } else if (refresh_this_block) { 155233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Else if it is accepted as candidate for refresh, and has not already 156233d2500723e5594f3e7c70896ffeeef32b9c950ywan // been refreshed (marked as 1) then mark it as a candidate for cleanup 157233d2500723e5594f3e7c70896ffeeef32b9c950ywan // for future time (marked as 0), otherwise don't update it. 158233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cr->map[block_index] == 1) 159233d2500723e5594f3e7c70896ffeeef32b9c950ywan new_map_value = 0; 160233d2500723e5594f3e7c70896ffeeef32b9c950ywan } else { 161233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Leave it marked as block that is not candidate for refresh. 162233d2500723e5594f3e7c70896ffeeef32b9c950ywan new_map_value = 1; 163233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 164233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Update entries in the cyclic refresh map with new_map_value, and 165233d2500723e5594f3e7c70896ffeeef32b9c950ywan // copy mbmi->segment_id into global segmentation map. 166233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (y = 0; y < ymis; y++) 167233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (x = 0; x < xmis; x++) { 168233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->map[block_index + y * cm->mi_cols + x] = new_map_value; 169233d2500723e5594f3e7c70896ffeeef32b9c950ywan cpi->segmentation_map[block_index + y * cm->mi_cols + x] = 170233d2500723e5594f3e7c70896ffeeef32b9c950ywan mbmi->segment_id; 171233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 172233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Keep track of actual number (in units of 8x8) of blocks in segment 1 used 173233d2500723e5594f3e7c70896ffeeef32b9c950ywan // for encoding this frame. 174233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (mbmi->segment_id) 175233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->num_seg_blocks += xmis * ymis; 176233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 177233d2500723e5594f3e7c70896ffeeef32b9c950ywan 178233d2500723e5594f3e7c70896ffeeef32b9c950ywan// Setup cyclic background refresh: set delta q and segmentation map. 179233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_cyclic_refresh_setup(VP9_COMP *const cpi) { 180233d2500723e5594f3e7c70896ffeeef32b9c950ywan VP9_COMMON *const cm = &cpi->common; 181233d2500723e5594f3e7c70896ffeeef32b9c950ywan const RATE_CONTROL *const rc = &cpi->rc; 182233d2500723e5594f3e7c70896ffeeef32b9c950ywan CYCLIC_REFRESH *const cr = cpi->cyclic_refresh; 183233d2500723e5594f3e7c70896ffeeef32b9c950ywan struct segmentation *const seg = &cm->seg; 184233d2500723e5594f3e7c70896ffeeef32b9c950ywan unsigned char *const seg_map = cpi->segmentation_map; 185233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int apply_cyclic_refresh = apply_cyclic_refresh_bitrate(cm, rc); 186233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Don't apply refresh on key frame or enhancement layer frames. 187233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (!apply_cyclic_refresh || 188233d2500723e5594f3e7c70896ffeeef32b9c950ywan (cm->frame_type == KEY_FRAME) || 189233d2500723e5594f3e7c70896ffeeef32b9c950ywan (cpi->svc.temporal_layer_id > 0)) { 190233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Set segmentation map to 0 and disable. 191233d2500723e5594f3e7c70896ffeeef32b9c950ywan vpx_memset(seg_map, 0, cm->mi_rows * cm->mi_cols); 192233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_disable_segmentation(&cm->seg); 193233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cm->frame_type == KEY_FRAME) 194233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->sb_index = 0; 195233d2500723e5594f3e7c70896ffeeef32b9c950ywan return; 196233d2500723e5594f3e7c70896ffeeef32b9c950ywan } else { 197233d2500723e5594f3e7c70896ffeeef32b9c950ywan int qindex_delta = 0; 198233d2500723e5594f3e7c70896ffeeef32b9c950ywan int i, block_count, bl_index, sb_rows, sb_cols, sbs_in_frame; 199233d2500723e5594f3e7c70896ffeeef32b9c950ywan int xmis, ymis, x, y, qindex2; 200233d2500723e5594f3e7c70896ffeeef32b9c950ywan 201233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Rate target ratio to set q delta. 202233d2500723e5594f3e7c70896ffeeef32b9c950ywan const float rate_ratio_qdelta = 2.0; 203233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_clear_system_state(); 204233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Some of these parameters may be set via codec-control function later. 205233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->max_sbs_perframe = 10; 206233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->max_qdelta_perc = 50; 207233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->min_block_size = BLOCK_8X8; 208233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->time_for_refresh = 1; 209233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Set rate threshold to some fraction of target (and scaled by 256). 210233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->thresh_rate_sb = (rc->sb64_target_rate * 256) >> 2; 211233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Distortion threshold, quadratic in Q, scale factor to be adjusted. 212233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->thresh_dist_sb = 8 * (int)(vp9_convert_qindex_to_q(cm->base_qindex) * 213233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_convert_qindex_to_q(cm->base_qindex)); 214233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cpi->sf.use_nonrd_pick_mode) { 215233d2500723e5594f3e7c70896ffeeef32b9c950ywan // May want to be more conservative with thresholds in non-rd mode for now 216233d2500723e5594f3e7c70896ffeeef32b9c950ywan // as rate/distortion are derived from model based on prediction residual. 217233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->thresh_rate_sb = (rc->sb64_target_rate * 256) >> 3; 218233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->thresh_dist_sb = 4 * (int)(vp9_convert_qindex_to_q(cm->base_qindex) * 219233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_convert_qindex_to_q(cm->base_qindex)); 220233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 221233d2500723e5594f3e7c70896ffeeef32b9c950ywan 222233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->num_seg_blocks = 0; 223233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Set up segmentation. 224233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Clear down the segment map. 225233d2500723e5594f3e7c70896ffeeef32b9c950ywan vpx_memset(seg_map, 0, cm->mi_rows * cm->mi_cols); 226233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_enable_segmentation(&cm->seg); 227233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_clearall_segfeatures(seg); 228233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Select delta coding method. 229233d2500723e5594f3e7c70896ffeeef32b9c950ywan seg->abs_delta = SEGMENT_DELTADATA; 230233d2500723e5594f3e7c70896ffeeef32b9c950ywan 231233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Note: setting temporal_update has no effect, as the seg-map coding method 232233d2500723e5594f3e7c70896ffeeef32b9c950ywan // (temporal or spatial) is determined in vp9_choose_segmap_coding_method(), 233233d2500723e5594f3e7c70896ffeeef32b9c950ywan // based on the coding cost of each method. For error_resilient mode on the 234233d2500723e5594f3e7c70896ffeeef32b9c950ywan // last_frame_seg_map is set to 0, so if temporal coding is used, it is 235233d2500723e5594f3e7c70896ffeeef32b9c950ywan // relative to 0 previous map. 236233d2500723e5594f3e7c70896ffeeef32b9c950ywan // seg->temporal_update = 0; 237233d2500723e5594f3e7c70896ffeeef32b9c950ywan 238233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Segment 0 "Q" feature is disabled so it defaults to the baseline Q. 239233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_disable_segfeature(seg, 0, SEG_LVL_ALT_Q); 240233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Use segment 1 for in-frame Q adjustment. 241233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_enable_segfeature(seg, 1, SEG_LVL_ALT_Q); 242233d2500723e5594f3e7c70896ffeeef32b9c950ywan 243233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Set the q delta for segment 1. 244233d2500723e5594f3e7c70896ffeeef32b9c950ywan qindex_delta = vp9_compute_qdelta_by_rate(cpi, 245233d2500723e5594f3e7c70896ffeeef32b9c950ywan cm->base_qindex, 246233d2500723e5594f3e7c70896ffeeef32b9c950ywan rate_ratio_qdelta); 247233d2500723e5594f3e7c70896ffeeef32b9c950ywan // TODO(marpan): Incorporate the actual-vs-target rate over/undershoot from 248233d2500723e5594f3e7c70896ffeeef32b9c950ywan // previous encoded frame. 249233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (-qindex_delta > cr->max_qdelta_perc * cm->base_qindex / 100) 250233d2500723e5594f3e7c70896ffeeef32b9c950ywan qindex_delta = -cr->max_qdelta_perc * cm->base_qindex / 100; 251233d2500723e5594f3e7c70896ffeeef32b9c950ywan 252233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Compute rd-mult for segment 1. 253233d2500723e5594f3e7c70896ffeeef32b9c950ywan qindex2 = clamp(cm->base_qindex + cm->y_dc_delta_q + qindex_delta, 0, MAXQ); 254233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->rdmult = vp9_compute_rd_mult(cpi, qindex2); 255233d2500723e5594f3e7c70896ffeeef32b9c950ywan 256233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_set_segdata(seg, 1, SEG_LVL_ALT_Q, qindex_delta); 257233d2500723e5594f3e7c70896ffeeef32b9c950ywan 258233d2500723e5594f3e7c70896ffeeef32b9c950ywan sb_cols = (cm->mi_cols + MI_BLOCK_SIZE - 1) / MI_BLOCK_SIZE; 259233d2500723e5594f3e7c70896ffeeef32b9c950ywan sb_rows = (cm->mi_rows + MI_BLOCK_SIZE - 1) / MI_BLOCK_SIZE; 260233d2500723e5594f3e7c70896ffeeef32b9c950ywan sbs_in_frame = sb_cols * sb_rows; 261233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Number of target superblocks to get the q delta (segment 1). 262233d2500723e5594f3e7c70896ffeeef32b9c950ywan block_count = cr->max_sbs_perframe * sbs_in_frame / 100; 263233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Set the segmentation map: cycle through the superblocks, starting at 264233d2500723e5594f3e7c70896ffeeef32b9c950ywan // cr->mb_index, and stopping when either block_count blocks have been found 265233d2500723e5594f3e7c70896ffeeef32b9c950ywan // to be refreshed, or we have passed through whole frame. 266233d2500723e5594f3e7c70896ffeeef32b9c950ywan assert(cr->sb_index < sbs_in_frame); 267233d2500723e5594f3e7c70896ffeeef32b9c950ywan i = cr->sb_index; 268233d2500723e5594f3e7c70896ffeeef32b9c950ywan do { 269233d2500723e5594f3e7c70896ffeeef32b9c950ywan int sum_map = 0; 270233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Get the mi_row/mi_col corresponding to superblock index i. 271233d2500723e5594f3e7c70896ffeeef32b9c950ywan int sb_row_index = (i / sb_cols); 272233d2500723e5594f3e7c70896ffeeef32b9c950ywan int sb_col_index = i - sb_row_index * sb_cols; 273233d2500723e5594f3e7c70896ffeeef32b9c950ywan int mi_row = sb_row_index * MI_BLOCK_SIZE; 274233d2500723e5594f3e7c70896ffeeef32b9c950ywan int mi_col = sb_col_index * MI_BLOCK_SIZE; 275233d2500723e5594f3e7c70896ffeeef32b9c950ywan assert(mi_row >= 0 && mi_row < cm->mi_rows); 276233d2500723e5594f3e7c70896ffeeef32b9c950ywan assert(mi_col >= 0 && mi_col < cm->mi_cols); 277233d2500723e5594f3e7c70896ffeeef32b9c950ywan bl_index = mi_row * cm->mi_cols + mi_col; 278233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Loop through all 8x8 blocks in superblock and update map. 279233d2500723e5594f3e7c70896ffeeef32b9c950ywan xmis = MIN(cm->mi_cols - mi_col, 280233d2500723e5594f3e7c70896ffeeef32b9c950ywan num_8x8_blocks_wide_lookup[BLOCK_64X64]); 281233d2500723e5594f3e7c70896ffeeef32b9c950ywan ymis = MIN(cm->mi_rows - mi_row, 282233d2500723e5594f3e7c70896ffeeef32b9c950ywan num_8x8_blocks_high_lookup[BLOCK_64X64]); 283233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (y = 0; y < ymis; y++) { 284233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (x = 0; x < xmis; x++) { 285233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int bl_index2 = bl_index + y * cm->mi_cols + x; 286233d2500723e5594f3e7c70896ffeeef32b9c950ywan // If the block is as a candidate for clean up then mark it 287233d2500723e5594f3e7c70896ffeeef32b9c950ywan // for possible boost/refresh (segment 1). The segment id may get 288233d2500723e5594f3e7c70896ffeeef32b9c950ywan // reset to 0 later if block gets coded anything other than ZEROMV. 289233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (cr->map[bl_index2] == 0) { 290233d2500723e5594f3e7c70896ffeeef32b9c950ywan seg_map[bl_index2] = 1; 291233d2500723e5594f3e7c70896ffeeef32b9c950ywan sum_map++; 292233d2500723e5594f3e7c70896ffeeef32b9c950ywan } else if (cr->map[bl_index2] < 0) { 293233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->map[bl_index2]++; 294233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 295233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 296233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 297233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Enforce constant segment over superblock. 298233d2500723e5594f3e7c70896ffeeef32b9c950ywan // If segment is partial over superblock, reset to either all 1 or 0. 299233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (sum_map > 0 && sum_map < xmis * ymis) { 300233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int new_value = (sum_map >= xmis * ymis / 2); 301233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (y = 0; y < ymis; y++) 302233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (x = 0; x < xmis; x++) 303233d2500723e5594f3e7c70896ffeeef32b9c950ywan seg_map[bl_index + y * cm->mi_cols + x] = new_value; 304233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 305233d2500723e5594f3e7c70896ffeeef32b9c950ywan i++; 306233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (i == sbs_in_frame) { 307233d2500723e5594f3e7c70896ffeeef32b9c950ywan i = 0; 308233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 309233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (sum_map >= xmis * ymis /2) 310233d2500723e5594f3e7c70896ffeeef32b9c950ywan block_count--; 311233d2500723e5594f3e7c70896ffeeef32b9c950ywan } while (block_count && i != cr->sb_index); 312233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->sb_index = i; 313233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 314233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 315233d2500723e5594f3e7c70896ffeeef32b9c950ywan 316233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_cyclic_refresh_set_rate_and_dist_sb(CYCLIC_REFRESH *cr, 317233d2500723e5594f3e7c70896ffeeef32b9c950ywan int64_t rate_sb, int64_t dist_sb) { 318233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->projected_rate_sb = rate_sb; 319233d2500723e5594f3e7c70896ffeeef32b9c950ywan cr->projected_dist_sb = dist_sb; 320233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 321233d2500723e5594f3e7c70896ffeeef32b9c950ywan 322233d2500723e5594f3e7c70896ffeeef32b9c950ywanint vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr) { 323233d2500723e5594f3e7c70896ffeeef32b9c950ywan return cr->rdmult; 324233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 325