243 lines
12 KiB
C
243 lines
12 KiB
C
/*
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* Copyright (c) 2019, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AV1_ENCODER_PARTITION_STRATEGY_H_
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#define AOM_AV1_ENCODER_PARTITION_STRATEGY_H_
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#include "config/aom_config.h"
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#include "av1/encoder/encodeframe.h"
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#include "av1/encoder/encodeframe_utils.h"
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#include "av1/encoder/encodemb.h"
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#include "av1/encoder/encoder.h"
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#if !CONFIG_REALTIME_ONLY
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// Early terminates PARTITION_NONE using simple_motion_search features and the
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// rate, distortion, and rdcost of PARTITION_NONE. This is only called when:
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// - The frame is a show frame
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// - The frame is not intra only
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// - The current bsize is > BLOCK_8X8
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// - blk_row + blk_height/2 < total_rows and blk_col + blk_width/2 < total_cols
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void av1_simple_motion_search_early_term_none(AV1_COMP *const cpi,
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MACROBLOCK *x,
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SIMPLE_MOTION_DATA_TREE *sms_tree,
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const RD_STATS *none_rdc,
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PartitionSearchState *part_state);
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// Get the features for selecting the max and min partition size. Currently this
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// performs simple_motion_search on 16X16 subblocks of the current superblock,
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// and then extract the statistics of sse and motion vectors as features.
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void av1_get_max_min_partition_features(AV1_COMP *const cpi, MACROBLOCK *x,
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int mi_row, int mi_col,
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float *features);
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// Predict the maximum BLOCK_SIZE to be used to encoder the current superblock.
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BLOCK_SIZE av1_predict_max_partition(const AV1_COMP *const cpi,
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const MACROBLOCK *const x,
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const float *features);
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// Attempts an early termination after PARTITION_SPLIT.
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void av1_ml_early_term_after_split(AV1_COMP *const cpi, MACROBLOCK *const x,
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SIMPLE_MOTION_DATA_TREE *const sms_tree,
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int64_t best_rd, int64_t part_none_rd,
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int64_t part_split_rd,
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int64_t *split_block_rd,
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PartitionSearchState *part_state);
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// Use the rdcost ratio and source var ratio to prune PARTITION_HORZ and
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// PARTITION_VERT.
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// TODO(chiyotsai@google.com): Currently this model does not use q value and has
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// no information about rectangular partitions. Preliminary experiments suggest
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// that we can get better performance by adding in q_index and rectangular
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// sse/var from SMS. We should retrain and tune this model later.
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void av1_ml_prune_rect_partition(AV1_COMP *const cpi, const MACROBLOCK *const x,
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int64_t best_rd, int64_t none_rd,
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const int64_t *split_rd,
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PartitionSearchState *part_state);
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// Use a ML model to predict if horz4 and vert4 should be considered.
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void av1_ml_prune_4_partition(AV1_COMP *const cpi, MACROBLOCK *const x,
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int part_ctx, int64_t best_rd,
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PartitionSearchState *part_state,
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int *part4_allowed,
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unsigned int pb_source_variance);
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// ML-based partition search breakout after PARTITION_NONE.
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void av1_ml_predict_breakout(AV1_COMP *const cpi, const MACROBLOCK *const x,
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const RD_STATS *const rd_stats,
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unsigned int pb_source_variance, int bit_depth,
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PartitionSearchState *part_state);
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// The first round of partition pruning determined before any partition
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// has been tested. The decisions will be updated and passed back
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// to the partition search function.
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void av1_prune_partitions_before_search(AV1_COMP *const cpi,
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MACROBLOCK *const x,
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SIMPLE_MOTION_DATA_TREE *const sms_tree,
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PartitionSearchState *part_state);
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// Prune out partitions that lead to coding block sizes outside the min and max
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// bsizes set by the encoder. Max and min square partition levels are defined as
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// the partition nodes that the recursive function rd_pick_partition() can
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// reach. To implement this: only PARTITION_NONE is allowed if the current node
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// equals max_partition_size, only PARTITION_SPLIT is allowed if the current
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// node exceeds max_partition_size.
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void av1_prune_partitions_by_max_min_bsize(SuperBlockEnc *sb_enc,
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PartitionSearchState *part_state);
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// Prune out AB partitions based on rd decisions made from testing the
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// basic partitions.
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void av1_prune_ab_partitions(AV1_COMP *cpi, const MACROBLOCK *x,
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const PC_TREE *pc_tree, int pb_source_variance,
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int64_t best_rdcost,
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const RD_RECT_PART_WIN_INFO *rect_part_win_info,
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bool ext_partition_allowed,
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PartitionSearchState *part_state,
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int *ab_partitions_allowed);
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void av1_collect_motion_search_features_sb(AV1_COMP *const cpi, ThreadData *td,
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TileDataEnc *tile_data,
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const int mi_row, const int mi_col,
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const BLOCK_SIZE bsize,
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aom_partition_features_t *features);
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#if CONFIG_PARTITION_SEARCH_ORDER
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void av1_prepare_motion_search_features_block(
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AV1_COMP *const cpi, ThreadData *td, TileDataEnc *tile_data,
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const int mi_row, const int mi_col, const BLOCK_SIZE bsize,
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const int valid_partition_types, unsigned int *block_sse,
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unsigned int *block_var, unsigned int sub_block_sse[4],
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unsigned int sub_block_var[4], unsigned int horz_block_sse[2],
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unsigned int horz_block_var[2], unsigned int vert_block_sse[2],
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unsigned int vert_block_var[2]);
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#endif // CONFIG_PARTITION_SEARCH_ORDER
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#endif // !CONFIG_REALTIME_ONLY
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// A simplified version of set_offsets meant to be used for
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// simple_motion_search.
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static inline void set_offsets_for_motion_search(const AV1_COMP *const cpi,
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MACROBLOCK *const x,
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int mi_row, int mi_col,
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BLOCK_SIZE bsize) {
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const AV1_COMMON *const cm = &cpi->common;
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const CommonModeInfoParams *const mi_params = &cm->mi_params;
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const int num_planes = av1_num_planes(cm);
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MACROBLOCKD *const xd = &x->e_mbd;
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const int mi_width = mi_size_wide[bsize];
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const int mi_height = mi_size_high[bsize];
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set_mode_info_offsets(&cpi->common.mi_params, &cpi->mbmi_ext_info, x, xd,
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mi_row, mi_col);
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// Set up destination pointers.
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av1_setup_dst_planes(xd->plane, bsize, &cm->cur_frame->buf, mi_row, mi_col, 0,
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num_planes);
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// Set up limit values for MV components.
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// Mv beyond the range do not produce new/different prediction block.
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av1_set_mv_limits(mi_params, &x->mv_limits, mi_row, mi_col, mi_height,
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mi_width, cpi->oxcf.border_in_pixels);
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set_plane_n4(xd, mi_width, mi_height, num_planes);
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xd->mi_row = mi_row;
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xd->mi_col = mi_col;
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// Set up distance of MB to edge of frame in 1/8th pel units.
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assert(!(mi_col & (mi_width - 1)) && !(mi_row & (mi_height - 1)));
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xd->mb_to_top_edge = -GET_MV_SUBPEL(mi_row * MI_SIZE);
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xd->mb_to_bottom_edge =
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GET_MV_SUBPEL((mi_params->mi_rows - mi_height - mi_row) * MI_SIZE);
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xd->mb_to_left_edge = -GET_MV_SUBPEL(mi_col * MI_SIZE);
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xd->mb_to_right_edge =
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GET_MV_SUBPEL((mi_params->mi_cols - mi_width - mi_col) * MI_SIZE);
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// Set up source buffers.
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av1_setup_src_planes(x, cpi->source, mi_row, mi_col, num_planes, bsize);
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}
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void av1_init_simple_motion_search_mvs_for_sb(const AV1_COMP *cpi,
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const TileInfo *tile_info,
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MACROBLOCK *x,
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SIMPLE_MOTION_DATA_TREE *sms_root,
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int mi_row, int mi_col);
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static inline int is_full_sb(const CommonModeInfoParams *const mi_params,
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int mi_row, int mi_col, BLOCK_SIZE sb_size) {
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const int sb_mi_wide = mi_size_wide[sb_size];
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const int sb_mi_high = mi_size_high[sb_size];
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return (mi_row + sb_mi_high) <= mi_params->mi_rows &&
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(mi_col + sb_mi_wide) <= mi_params->mi_cols;
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}
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#if !CONFIG_REALTIME_ONLY
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// Do not use this criteria for screen content videos.
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// Since screen content videos could often find good predictors and the largest
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// block size is likely to be used.
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static inline int use_auto_max_partition(const AV1_COMP *const cpi,
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BLOCK_SIZE sb_size, int mi_row,
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int mi_col) {
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assert(IMPLIES(cpi->ppi->gf_group.size > 0,
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cpi->gf_frame_index < cpi->ppi->gf_group.size));
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const AV1_COMMON *const cm = &cpi->common;
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return !frame_is_intra_only(cm) && !cpi->use_screen_content_tools &&
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cpi->sf.part_sf.auto_max_partition_based_on_simple_motion !=
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NOT_IN_USE &&
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sb_size == BLOCK_128X128 &&
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is_full_sb(&cm->mi_params, mi_row, mi_col, sb_size) &&
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cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
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OVERLAY_UPDATE &&
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cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
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INTNL_OVERLAY_UPDATE;
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}
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static BLOCK_SIZE dim_to_size(int dim) {
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switch (dim) {
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case 4: return BLOCK_4X4;
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case 8: return BLOCK_8X8;
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case 16: return BLOCK_16X16;
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case 32: return BLOCK_32X32;
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case 64: return BLOCK_64X64;
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case 128: return BLOCK_128X128;
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default: assert(0); return 0;
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}
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}
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static inline void set_max_min_partition_size(SuperBlockEnc *sb_enc,
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AV1_COMP *cpi, MACROBLOCK *x,
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const SPEED_FEATURES *sf,
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BLOCK_SIZE sb_size, int mi_row,
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int mi_col) {
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const AV1_COMMON *cm = &cpi->common;
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sb_enc->max_partition_size =
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AOMMIN(sf->part_sf.default_max_partition_size,
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dim_to_size(cpi->oxcf.part_cfg.max_partition_size));
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sb_enc->min_partition_size =
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AOMMAX(sf->part_sf.default_min_partition_size,
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dim_to_size(cpi->oxcf.part_cfg.min_partition_size));
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sb_enc->max_partition_size =
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AOMMIN(sb_enc->max_partition_size, cm->seq_params->sb_size);
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sb_enc->min_partition_size =
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AOMMIN(sb_enc->min_partition_size, cm->seq_params->sb_size);
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if (use_auto_max_partition(cpi, sb_size, mi_row, mi_col)) {
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float features[FEATURE_SIZE_MAX_MIN_PART_PRED] = { 0.0f };
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av1_get_max_min_partition_features(cpi, x, mi_row, mi_col, features);
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sb_enc->max_partition_size =
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AOMMAX(AOMMIN(av1_predict_max_partition(cpi, x, features),
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sb_enc->max_partition_size),
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sb_enc->min_partition_size);
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}
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}
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#endif // !CONFIG_REALTIME_ONLY
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#endif // AOM_AV1_ENCODER_PARTITION_STRATEGY_H_
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