| /* |
| * Copyright (c) 2021, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 3-Clause Clear License |
| * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear |
| * License was not distributed with this source code in the LICENSE file, you |
| * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. If the |
| * Alliance for Open Media Patent License 1.0 was not distributed with this |
| * source code in the PATENTS file, you can obtain it at |
| * aomedia.org/license/patent-license/. |
| */ |
| |
| #include <limits.h> |
| |
| #include "aom_mem/aom_mem.h" |
| |
| #include "av1/common/pred_common.h" |
| #include "av1/common/tile_common.h" |
| |
| #include "av1/common/cost.h" |
| #include "av1/encoder/segmentation.h" |
| |
| void av1_enable_segmentation(struct segmentation *seg) { |
| seg->enabled = 1; |
| seg->update_map = 1; |
| seg->update_data = 1; |
| seg->temporal_update = 0; |
| } |
| |
| void av1_disable_segmentation(struct segmentation *seg) { |
| seg->enabled = 0; |
| seg->update_map = 0; |
| seg->update_data = 0; |
| seg->temporal_update = 0; |
| } |
| |
| void av1_disable_segfeature(struct segmentation *seg, int segment_id, |
| SEG_LVL_FEATURES feature_id) { |
| seg->feature_mask[segment_id] &= ~(1 << feature_id); |
| } |
| |
| void av1_clear_segdata(struct segmentation *seg, int segment_id, |
| SEG_LVL_FEATURES feature_id) { |
| seg->feature_data[segment_id][feature_id] = 0; |
| } |
| |
| static void count_segs(const AV1_COMMON *cm, MACROBLOCKD *xd, |
| const TileInfo *tile, MB_MODE_INFO **mi, |
| unsigned *no_pred_segcounts, |
| unsigned (*temporal_predictor_count)[2], |
| unsigned *t_unpred_seg_counts, int bw, int bh, |
| int mi_row, int mi_col) { |
| const CommonModeInfoParams *const mi_params = &cm->mi_params; |
| if (mi_row >= mi_params->mi_rows || mi_col >= mi_params->mi_cols) return; |
| |
| xd->mi = mi; |
| assert(xd->mi && xd->mi[0]); |
| set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, mi_params->mi_rows, |
| mi_params->mi_cols, &xd->mi[0]->chroma_ref_info); |
| |
| // Count the number of hits on each segment with no prediction |
| const int segment_id = xd->mi[0]->segment_id; |
| no_pred_segcounts[segment_id]++; |
| |
| // Temporal prediction not allowed on key frames |
| if (cm->current_frame.frame_type != KEY_FRAME && |
| xd->mi[0]->region_type != INTRA_REGION) { |
| const BLOCK_SIZE bsize = xd->mi[0]->sb_type[xd->tree_type == CHROMA_PART]; |
| // Test to see if the segment id matches the predicted value. |
| const int pred_segment_id = |
| cm->last_frame_seg_map |
| ? get_segment_id(mi_params, cm->last_frame_seg_map, bsize, mi_row, |
| mi_col) |
| : 0; |
| const int pred_flag = pred_segment_id == segment_id; |
| const int pred_context = av1_get_pred_context_seg_id(xd); |
| |
| // Store the prediction status for this mb and update counts |
| // as appropriate |
| xd->mi[0]->seg_id_predicted = pred_flag; |
| temporal_predictor_count[pred_context][pred_flag]++; |
| |
| // Update the "unpredicted" segment count |
| if (!pred_flag) t_unpred_seg_counts[segment_id]++; |
| } |
| } |
| |
| static void count_segs_sb(const AV1_COMMON *cm, MACROBLOCKD *xd, |
| const TileInfo *tile, MB_MODE_INFO **mi, |
| unsigned *no_pred_segcounts, |
| unsigned (*temporal_predictor_count)[2], |
| unsigned *t_unpred_seg_counts, int mi_row, int mi_col, |
| const PARTITION_TREE *ptree) { |
| const CommonModeInfoParams *const mi_params = &cm->mi_params; |
| const int mis = mi_params->mi_stride; |
| BLOCK_SIZE bsize = ptree->bsize; |
| const int bw = mi_size_wide[bsize], bh = mi_size_high[bsize]; |
| const int hbw = bw / 2, hbh = bh / 2; |
| const int qbw = bw / 4, qbh = bh / 4; |
| const int ebw = bw / 8, ebh = bh / 8; |
| |
| if (mi_row >= mi_params->mi_rows || mi_col >= mi_params->mi_cols) return; |
| |
| #define CSEGS(cs_bw, cs_bh, cs_rowoff, cs_coloff) \ |
| count_segs(cm, xd, tile, mi + mis * (cs_rowoff) + (cs_coloff), \ |
| no_pred_segcounts, temporal_predictor_count, t_unpred_seg_counts, \ |
| (cs_bw), (cs_bh), mi_row + (cs_rowoff), mi_col + (cs_coloff)); |
| #define CSEGS_RECURSIVE(cs_rowoff, cs_coloff, subtree) \ |
| count_segs_sb(cm, xd, tile, mi + mis * (cs_rowoff) + (cs_coloff), \ |
| no_pred_segcounts, temporal_predictor_count, \ |
| t_unpred_seg_counts, mi_row + (cs_rowoff), \ |
| mi_col + (cs_coloff), subtree); |
| |
| int tree_idx = 0; |
| const PARTITION_TYPE partition = ptree->partition; |
| switch (partition) { |
| case PARTITION_NONE: CSEGS(bw, bh, 0, 0); break; |
| case PARTITION_HORZ: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(hbh, 0, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_VERT: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(0, hbw, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_HORZ_3: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(qbh, 0, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(qbh, hbw, ptree->sub_tree[tree_idx++]); |
| if (mi_row + 3 * qbh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(3 * qbh, 0, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_VERT_3: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(0, qbw, ptree->sub_tree[tree_idx++]); |
| CSEGS_RECURSIVE(hbh, qbw, ptree->sub_tree[tree_idx++]); |
| if (mi_col + 3 * qbw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, 3 * qbw, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_HORZ_4A: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(ebh, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + 3 * ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(3 * ebh, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + 7 * ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(7 * ebh, 0, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_HORZ_4B: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(ebh, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + 5 * ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(5 * ebh, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_row + 7 * ebh < mi_params->mi_rows) |
| CSEGS_RECURSIVE(7 * ebh, 0, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_VERT_4A: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_col + ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, ebw, ptree->sub_tree[tree_idx++]); |
| if (mi_col + 3 * ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, 3 * ebw, ptree->sub_tree[tree_idx++]); |
| if (mi_col + 7 * ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, 7 * ebw, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_VERT_4B: |
| CSEGS_RECURSIVE(0, 0, ptree->sub_tree[tree_idx++]); |
| if (mi_col + ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, ebw, ptree->sub_tree[tree_idx++]); |
| if (mi_col + 5 * ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, 5 * ebw, ptree->sub_tree[tree_idx++]); |
| if (mi_col + 7 * ebw < mi_params->mi_cols) |
| CSEGS_RECURSIVE(0, 7 * ebw, ptree->sub_tree[tree_idx++]); |
| break; |
| case PARTITION_SPLIT: { |
| for (int n = 0; n < 4; n++) { |
| const int mi_dc = hbw * (n & 1); |
| const int mi_dr = hbh * (n >> 1); |
| count_segs_sb(cm, xd, tile, &mi[mi_dr * mis + mi_dc], no_pred_segcounts, |
| temporal_predictor_count, t_unpred_seg_counts, |
| mi_row + mi_dr, mi_col + mi_dc, ptree->sub_tree[n]); |
| } |
| } break; |
| default: assert(0); |
| } |
| |
| #undef CSEGS |
| } |
| |
| void av1_choose_segmap_coding_method(AV1_COMMON *cm, MACROBLOCKD *xd) { |
| struct segmentation *seg = &cm->seg; |
| struct segmentation_probs *segp = &cm->fc->seg; |
| int no_pred_cost; |
| int t_pred_cost = INT_MAX; |
| int tile_col, tile_row, mi_row, mi_col; |
| unsigned temporal_predictor_count[SEG_TEMPORAL_PRED_CTXS][2] = { { 0 } }; |
| unsigned no_pred_segcounts[MAX_SEGMENTS] = { 0 }; |
| unsigned t_unpred_seg_counts[MAX_SEGMENTS] = { 0 }; |
| (void)xd; |
| int scale_up = cm->prev_frame && (cm->width > cm->prev_frame->width || |
| cm->height > cm->prev_frame->height); |
| // First of all generate stats regarding how well the last segment map |
| // predicts this one |
| if (!scale_up) { |
| for (tile_row = 0; tile_row < cm->tiles.rows; tile_row++) { |
| TileInfo tile_info; |
| av1_tile_set_row(&tile_info, cm, tile_row); |
| for (tile_col = 0; tile_col < cm->tiles.cols; tile_col++) { |
| MB_MODE_INFO **mi_ptr; |
| av1_tile_set_col(&tile_info, cm, tile_col); |
| mi_ptr = cm->mi_params.mi_grid_base + |
| tile_info.mi_row_start * cm->mi_params.mi_stride + |
| tile_info.mi_col_start; |
| for (mi_row = tile_info.mi_row_start; mi_row < tile_info.mi_row_end; |
| mi_row += cm->mib_size, |
| mi_ptr += cm->mib_size * cm->mi_params.mi_stride) { |
| MB_MODE_INFO **mi = mi_ptr; |
| for (mi_col = tile_info.mi_col_start; mi_col < tile_info.mi_col_end; |
| mi_col += cm->mib_size, mi += cm->mib_size) { |
| const SB_INFO *sbi = av1_get_sb_info(cm, mi_row, mi_col); |
| const PARTITION_TREE *ptree = sbi->ptree_root[AOM_PLANE_Y]; |
| count_segs_sb(cm, xd, &tile_info, mi, no_pred_segcounts, |
| temporal_predictor_count, t_unpred_seg_counts, mi_row, |
| mi_col, ptree); |
| } |
| } |
| } |
| } |
| } |
| |
| int seg_id_cost[MAX_SEGMENTS]; |
| av1_cost_tokens_from_cdf(seg_id_cost, segp->tree_cdf, NULL); |
| no_pred_cost = 0; |
| for (int i = 0; i < MAX_SEGMENTS; ++i) |
| no_pred_cost += no_pred_segcounts[i] * seg_id_cost[i]; |
| |
| // Frames without past dependency cannot use temporal prediction |
| if (cm->features.primary_ref_frame != PRIMARY_REF_NONE) { |
| int pred_flag_cost[SEG_TEMPORAL_PRED_CTXS][2]; |
| for (int i = 0; i < SEG_TEMPORAL_PRED_CTXS; ++i) |
| av1_cost_tokens_from_cdf(pred_flag_cost[i], segp->pred_cdf[i], NULL); |
| t_pred_cost = 0; |
| // Cost for signaling the prediction flag. |
| for (int i = 0; i < SEG_TEMPORAL_PRED_CTXS; ++i) { |
| for (int j = 0; j < 2; ++j) |
| t_pred_cost += temporal_predictor_count[i][j] * pred_flag_cost[i][j]; |
| } |
| // Cost for signaling the unpredicted segment id. |
| for (int i = 0; i < MAX_SEGMENTS; ++i) |
| t_pred_cost += t_unpred_seg_counts[i] * seg_id_cost[i]; |
| } |
| |
| // Now choose which coding method to use. |
| if (t_pred_cost < no_pred_cost) { |
| assert(!cm->features.error_resilient_mode); |
| seg->temporal_update = 1; |
| } else { |
| seg->temporal_update = 0; |
| } |
| } |
| |
| void av1_reset_segment_features(AV1_COMMON *cm) { |
| struct segmentation *seg = &cm->seg; |
| |
| // Set up default state for MB feature flags |
| seg->enabled = 0; |
| seg->update_map = 0; |
| seg->update_data = 0; |
| av1_clearall_segfeatures(seg); |
| } |
