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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_AQ_CYCLICREFRESH_H_
#define AOM_AV1_ENCODER_AQ_CYCLICREFRESH_H_
#include "av1/common/blockd.h"
#include "av1/encoder/block.h"
#include "av1/encoder/tokenize.h"
#ifdef __cplusplus
extern "C" {
#endif
// The segment ids used in cyclic refresh: from base (no boost) to increasing
// boost (higher delta-qp).
#define CR_SEGMENT_ID_BASE 0
#define CR_SEGMENT_ID_BOOST1 1
#define CR_SEGMENT_ID_BOOST2 2
// Maximum rate target ratio for setting segment delta-qp.
#define CR_MAX_RATE_TARGET_RATIO 4.0
/*!
* \brief The stucture of CYCLIC_REFRESH.
* \ingroup cyclic_refresh
*/
struct CYCLIC_REFRESH {
/*!
* Percentage of blocks per frame that are targeted as candidates
* for cyclic refresh.
*/
int percent_refresh;
/*!
* Active adjustment delta for cyclic refresh for rate control.
*/
int percent_refresh_adjustment;
/*!
* Maximum q-delta as percentage of base q.
*/
int max_qdelta_perc;
/*!
*Superblock starting index for cycling through the frame.
*/
int sb_index;
/*!
*Superblock index cyclic refresh index last frame
*/
int last_sb_index;
/*!
* Controls how long block will need to wait to be refreshed again, in
* excess of the cycle time, i.e., in the case of all zero motion, block
* will be refreshed every (100/percent_refresh + time_for_refresh) frames.
*/
int time_for_refresh;
/*!
* Target number of (4x4) blocks that are set for delta-q.
*/
int target_num_seg_blocks;
/*!
* Actual number of (4x4) blocks that were applied delta-q,
* for segment 1.
*/
int actual_num_seg1_blocks;
/*!
* Actual number of (4x4) blocks that were applied delta-q,
* for segment 2.
*/
int actual_num_seg2_blocks;
/*!
* RD mult. parameters for segment 1.
*/
int rdmult;
/*!
* Cyclic refresh map.
*/
int8_t *map;
/*!
* Threshold applied to the projected rate of the coding block,
* when deciding whether block should be refreshed.
*/
int64_t thresh_rate_sb;
/*!
* Threshold applied to the projected distortion of the coding block,
* when deciding whether block should be refreshed.
*/
int64_t thresh_dist_sb;
/*!
* Threshold applied to the motion vector (in units of 1/8 pel) of the
* coding block, when deciding whether block should be refreshed.
*/
int16_t motion_thresh;
/*!
* Rate target ratio to set q delta.
*/
double rate_ratio_qdelta;
/*!
* Active adjustment of qdelta rate ratio for enhanced rate control
*/
double rate_ratio_qdelta_adjustment;
/*!
* Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
*/
int rate_boost_fac;
/*!\cond */
int qindex_delta[3];
int apply_cyclic_refresh;
int skip_over4x4;
int counter_encode_maxq_scene_change;
int use_block_sad_scene_det;
/*!\endcond */
};
struct AV1_COMP;
typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
CYCLIC_REFRESH *av1_cyclic_refresh_alloc(int mi_rows, int mi_cols);
void av1_cyclic_refresh_free(CYCLIC_REFRESH *cr);
/*!\brief Estimate the bits, incorporating the delta-q from the segments.
*
* For the just encoded frame, estimate the bits, incorporating the delta-q
* from non-base segment(s). Note this function is called in the postencode
* (called from rc_update_rate_correction_factors()).
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
* \param[in] correction_factor rate correction factor
*
* \return Return the estimated bits at given q.
*/
int av1_cyclic_refresh_estimate_bits_at_q(const struct AV1_COMP *cpi,
double correction_factor);
/*!\brief Estimate the bits per mb, for given q = i and delta-q.
*
* Prior to encoding the frame, estimate the bits per mb, for a given q = i and
* a corresponding delta-q (for segment 1). This function is called in the
* rc_regulate_q() to set the base qp index. Note: the segment map is set to
* either 0/CR_SEGMENT_ID_BASE (no refresh) or to 1/CR_SEGMENT_ID_BOOST1
* (refresh) for each superblock, prior to encoding.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
* \param[in] i q index
* \param[in] correction_factor rate correction factor
*
* \return Return the estimated bits for q = i and delta-q (segment 1).
*/
int av1_cyclic_refresh_rc_bits_per_mb(const struct AV1_COMP *cpi, int i,
double correction_factor);
/*!\brief Update segment_id for blocks are skipped.
*
* After encoding a given prediction block, of size bsize at (mi_row, mi_col),
* check if we should reset the segment_id based on skip_txfm,
* and update the cyclic_refresh map and segmentation counters.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
* \param[in] x Pointer to MACROBLOCK structure
* \param[in] mi_row Row coordinate of the block in a step size of MI_SIZE
* \param[in] mi_col Col coordinate of the block in a step size of MI_SIZE
* \param[in] bsize Block size
* \param[in] dry_run A code indicating whether it is part of the final
* pass for reconstructing the superblock
*
* \remark Update the \c mbmi->segment_id, the \c cpi->cyclic_refresh and
* the \c cm->cpi->enc_seg.map.
*/
void av1_cyclic_reset_segment_skip(const struct AV1_COMP *cpi,
MACROBLOCK *const x, int mi_row, int mi_col,
BLOCK_SIZE bsize, RUN_TYPE dry_run);
/*!\brief Update segment_id for block based on mode selected.
*
* Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
* check if we should reset the segment_id (based on mode/motion/skip selected
* for that block) and update the cyclic_refresh map and segmentation map.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
* \param[in] x Pointer to MACROBLOCK structure
* \param[in] mi_row Row coordinate of the block in a step size of MI_SIZE
* \param[in] mi_col Col coordinate of the block in a step size of MI_SIZE
* \param[in] bsize Block size
* \param[in] rate Projected block rate from pickmode
* \param[in] dist Projected block dist from pickmode
* \param[in] skip Skip flag set from picmode
* \param[in] dry_run A code indicating whether it is part of the final
* pass for reconstructing the superblock
*
* \remark Update the \c mbmi->segment_id, the \c cpi->cyclic_refresh and
* the \c cm->cpi->enc_seg.map.
*/
void av1_cyclic_refresh_update_segment(const struct AV1_COMP *cpi,
MACROBLOCK *const x, int mi_row,
int mi_col, BLOCK_SIZE bsize,
int64_t rate, int64_t dist, int skip,
RUN_TYPE dry_run);
/*!\brief Initialize counters used for cyclic refresh.
*
* Initializes cyclic refresh counters actual_num_seg1_blocks and
* actual_num_seg2_blocks.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] x Pointer to MACROBLOCK structure
*
* \remark Update the \c x->actual_num_seg1_blocks and the
* \c x->actual_num_seg2_blocks.
*/
void av1_init_cyclic_refresh_counters(MACROBLOCK *const x);
/*!\brief Accumulate cyclic refresh counters.
*
* Accumulates cyclic refresh counters actual_num_seg1_blocks and
* actual_num_seg2_blocks from MACROBLOCK strcture to CYCLIC_REFRESH strcture.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cyclic_refresh Pointer to CYCLIC_REFRESH structure
* \param[in] x Pointer to MACROBLOCK structure
*
* \remark Update the \c cyclic_refresh->actual_num_seg1_blocks and the
* \c cyclic_refresh->actual_num_seg2_blocks.
*/
void av1_accumulate_cyclic_refresh_counters(
CYCLIC_REFRESH *const cyclic_refresh, const MACROBLOCK *const x);
/*!\brief Set golden frame update interval nased on cyclic refresh.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
*
* \remark Returns the interval in \c cpi->rc.baseline_gf_interval.
*/
void av1_cyclic_refresh_set_golden_update(struct AV1_COMP *const cpi);
/*!\brief Set the global/frame level parameters for cyclic refresh.
*
* First call to the cyclic refresh, before encoding the frame.
* Sets the flag on whether cyclic refresh should be applied, sets
* the amount/percent of refresh, and the amount of boost applied to
* the two segments (set by rate_ratio_qdelta and rate_boost_fac).
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
*
* \remark Updates the \c cpi->cyclic_refresh with the settings.
*/
void av1_cyclic_refresh_update_parameters(struct AV1_COMP *const cpi);
/*!\brief Setup the cyclic background refresh.
*
* Set the delta q for the segment(s), and set the segmentation map.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
*
* \remark Updates the \c cpi->cyclic_refresh with the cyclic refresh
* parameters and the \c cm->seg with the segmentation data.
*/
void av1_cyclic_refresh_setup(struct AV1_COMP *const cpi);
int av1_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr);
int av1_cyclic_refresh_disable_lf_cdef(struct AV1_COMP *const cpi);
static inline int cyclic_refresh_segment_id_boosted(int segment_id) {
return segment_id == CR_SEGMENT_ID_BOOST1 ||
segment_id == CR_SEGMENT_ID_BOOST2;
}
static inline int cyclic_refresh_segment_id(int segment_id) {
if (segment_id == CR_SEGMENT_ID_BOOST1)
return CR_SEGMENT_ID_BOOST1;
else if (segment_id == CR_SEGMENT_ID_BOOST2)
return CR_SEGMENT_ID_BOOST2;
else
return CR_SEGMENT_ID_BASE;
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_AQ_CYCLICREFRESH_H_