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/*
* 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/.
*/
#ifndef AOM_AV1_ENCODER_AQ_CYCLICREFRESH_H_
#define AOM_AV1_ENCODER_AQ_CYCLICREFRESH_H_
#include "av1/common/blockd.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;
/*!
* Maximum q-delta as percentage of base q.
*/
int max_qdelta_perc;
/*!
*Superblock starting index for cycling through the frame.
*/
int 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;
/*!
* Map of the last q a block was coded at.
*/
uint16_t *last_coded_q_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;
/*!
* Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
*/
int rate_boost_fac;
/*!\cond */
double low_content_avg;
int qindex_delta[3];
double weight_segment;
int apply_cyclic_refresh;
int cnt_zeromv;
double avg_frame_low_motion;
/*!\endcond */
};
struct AV1_COMP;
typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
CYCLIC_REFRESH *av1_cyclic_refresh_alloc(int mi_rows, int mi_cols,
aom_bit_depth_t bit_depth);
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 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] mbmi MB_MODE_INFO pointer for mi block
* \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
*
* Updates 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,
MB_MODE_INFO *const mbmi, int mi_row,
int mi_col, BLOCK_SIZE bsize,
int64_t rate, int64_t dist, int skip);
/*!\brief Update stats after encoding frame.
*
* Update the number of block encoded with segment 1 and 2,
* and update the number of blocks encoded with small/zero motion.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
*
* Updates the \c cpi->cyclic_refresh with the new stats.
*/
void av1_cyclic_refresh_postencode(struct AV1_COMP *const cpi);
/*!\brief Set golden frame update interval nased on cyclic refresh.
*
* \ingroup cyclic_refresh
* \callgraph
* \callergraph
*
* \param[in] cpi Top level encoder structure
*
* Populates 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
*
* 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
*
* 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);
void av1_cyclic_refresh_reset_resize(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_