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/*
* 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) (((idx) & (0x01)) << (level))
#define GET_BLK_IDX_Y(idx, level) (((idx) >> (0x01)) << (level))
#ifdef __cplusplus
extern "C" {
#endif
#define QINDEX_LARGE_BLOCK_THR \
100 // Use increased thresholds for midres for speed 9 when qindex is above
// this threshold
#define CALC_CHROMA_THRESH_FOR_ZEROMV_SKIP(thresh_exit_part) \
((3 * (thresh_exit_part)) >> 2)
/*!\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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