/* * Copyright (c) 2016, Alliance for Open Media. All rights reserved. * * This source code is subject to the terms of the BSD 2 Clause License and * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License * was not distributed with this source code in the LICENSE file, you can * obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent. */ #ifndef AOM_AV1_ENCODER_VAR_BASED_PART_H_ #define AOM_AV1_ENCODER_VAR_BASED_PART_H_ #include <stdio.h> #include "config/aom_config.h" #include "config/aom_dsp_rtcd.h" #include "config/av1_rtcd.h" #include "av1/encoder/encoder.h" // Calculate block index x and y from split level and index #define GET_BLK_IDX_X(idx, level) … #define GET_BLK_IDX_Y(idx, level) … #ifdef __cplusplus extern "C" { #endif #define QINDEX_LARGE_BLOCK_THR … // this threshold #define CALC_CHROMA_THRESH_FOR_ZEROMV_SKIP(thresh_exit_part) … /*!\brief Set the thresholds for variance based partition. * * Set the variance split thresholds for following the block sizes: * 0 - threshold_128x128, 1 - threshold_64x64, 2 - threshold_32x32, * 3 - vbp_threshold_16x16. 4 - vbp_threshold_8x8 (to split to 4x4 partition) is * currently only used on key frame. The thresholds are based om Q, resolution, * noise level, and content state. * * \ingroup variance_partition * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] q q index * \param[in] content_lowsumdiff Low sumdiff flag for superblock * * \remark Returns the set of thresholds in \c cpi->vbp_info.thresholds. */ void av1_set_variance_partition_thresholds(AV1_COMP *cpi, int q, int content_lowsumdiff); /*!\brief Variance based partition selection. * * Select the partitioning based on the variance of the residual signal, * residual generated as the difference between the source and prediction. * The prediction is the reconstructed LAST or reconstructed GOLDEN, whichever * has lower y sad. For LAST, option exists (speed feature) to use motion * compensation based on superblock motion via int_pro_motion_estimation. For * key frames reference is fixed 128 level, so variance is the source variance. * The variance is computed for downsampled inputs (8x8 or 4x4 downsampled), * and selection is done top-down via as set of partition thresholds. defined * for each block level, and set based on Q, resolution, noise level, and * content state. * * \ingroup variance_partition * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] tile Pointer to TileInfo * \param[in] td Pointer to ThreadData * \param[in] x Pointer to MACROBLOCK * \param[in] mi_row Row coordinate of the superblock in a step size of MI_SIZE * \param[in] mi_col Column coordinate of the super block in a step size of MI_SIZE * * \return Returns the partition in \c xd->mi[0]->sb_type. Also sets the low * temporal variance flag and the color sensitivity flag (both used in * nonrd_pickmode). */ int av1_choose_var_based_partitioning(AV1_COMP *cpi, const TileInfo *const tile, ThreadData *td, MACROBLOCK *x, int mi_row, int mi_col); // Read out the block's temporal variance for 64x64 SB case. int av1_get_force_skip_low_temp_var_small_sb(const uint8_t *variance_low, int mi_row, int mi_col, BLOCK_SIZE bsize); // Read out the block's temporal variance for 128x128 SB case. int av1_get_force_skip_low_temp_var(const uint8_t *variance_low, int mi_row, int mi_col, BLOCK_SIZE bsize); #ifdef __cplusplus } // extern "C" #endif #endif // AOM_AV1_ENCODER_VAR_BASED_PART_H_
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