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/*
* Copyright (c) 2019, 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_TPL_MODEL_H_
#define AOM_AV1_ENCODER_TPL_MODEL_H_
#ifdef __cplusplus
extern "C" {
#endif
/*!\cond */
struct AV1_COMP;
struct EncodeFrameParams;
struct EncodeFrameInput;
#include "config/aom_config.h"
#include "aom_scale/yv12config.h"
#include "av1/common/mv.h"
#include "av1/common/scale.h"
#include "av1/encoder/block.h"
#include "av1/encoder/lookahead.h"
static INLINE BLOCK_SIZE convert_length_to_bsize(int length) {
switch (length) {
case 64: return BLOCK_64X64;
case 32: return BLOCK_32X32;
case 16: return BLOCK_16X16;
case 8: return BLOCK_8X8;
case 4: return BLOCK_4X4;
default:
assert(0 && "Invalid block size for tpl model");
return BLOCK_16X16;
}
}
typedef struct AV1TplRowMultiThreadSync {
#if CONFIG_MULTITHREAD
// Synchronization objects for top-right dependency.
pthread_mutex_t *mutex_;
pthread_cond_t *cond_;
#endif
// Buffer to store the macroblock whose encoding is complete.
// num_finished_cols[i] stores the number of macroblocks which finished
// encoding in the ith macroblock row.
int *num_finished_cols;
// Number of extra macroblocks of the top row to be complete for encoding
// of the current macroblock to start. A value of 1 indicates top-right
// dependency.
int sync_range;
// Number of macroblock rows.
int rows;
// Number of threads processing the current tile.
int num_threads_working;
} AV1TplRowMultiThreadSync;
typedef struct AV1TplRowMultiThreadInfo {
// Row synchronization related function pointers.
void (*sync_read_ptr)(AV1TplRowMultiThreadSync *tpl_mt_sync, int r, int c);
void (*sync_write_ptr)(AV1TplRowMultiThreadSync *tpl_mt_sync, int r, int c,
int cols);
} AV1TplRowMultiThreadInfo;
// TODO(jingning): This needs to be cleaned up next.
// TPL stats buffers are prepared for every frame in the GOP,
// including (internal) overlays and (internal) arfs.
// In addition, frames in the lookahead that are outside of the GOP
// are also used.
// Thus it should use
// (gop_length) + (# overlays) + (MAX_LAG_BUFFERS - gop_len) =
// MAX_LAG_BUFFERS + (# overlays)
// 2 * MAX_LAG_BUFFERS is therefore a safe estimate.
// TODO(bohanli): test setting it to 1.5 * MAX_LAG_BUFFER
#define MAX_TPL_FRAME_IDX (2 * MAX_LAG_BUFFERS)
// The first REF_FRAMES + 1 buffers are reserved.
// tpl_data->tpl_frame starts after REF_FRAMES + 1
#define MAX_LENGTH_TPL_FRAME_STATS (MAX_TPL_FRAME_IDX + REF_FRAMES + 1)
#define MAX_TPL_EXTEND (MAX_LAG_BUFFERS - MAX_GF_INTERVAL)
#define TPL_DEP_COST_SCALE_LOG2 4
#define TPL_EPSILON 0.0000001
typedef struct TplTxfmStats {
double abs_coeff_sum[256]; // Assume we are using 16x16 transform block
int txfm_block_count;
} TplTxfmStats;
typedef struct TplDepStats {
int64_t intra_cost;
int64_t inter_cost;
int64_t srcrf_dist;
int64_t recrf_dist;
int64_t cmp_recrf_dist[2];
int64_t srcrf_rate;
int64_t recrf_rate;
int64_t cmp_recrf_rate[2];
int64_t mc_dep_rate;
int64_t mc_dep_dist;
int_mv mv[INTER_REFS_PER_FRAME];
int ref_frame_index[2];
int64_t pred_error[INTER_REFS_PER_FRAME];
} TplDepStats;
typedef struct TplDepFrame {
uint8_t is_valid;
TplDepStats *tpl_stats_ptr;
const YV12_BUFFER_CONFIG *gf_picture;
YV12_BUFFER_CONFIG *rec_picture;
int ref_map_index[REF_FRAMES];
int stride;
int width;
int height;
int mi_rows;
int mi_cols;
int base_rdmult;
uint32_t frame_display_index;
double abs_coeff_sum[256]; // Assume we are using 16x16 transform block
double abs_coeff_mean[256];
int coeff_num; // number of coefficients in a transform block
int txfm_block_count;
} TplDepFrame;
/*!\endcond */
/*!
* \brief Params related to temporal dependency model.
*/
typedef struct TplParams {
/*!
* Block granularity of tpl score storage.
*/
uint8_t tpl_stats_block_mis_log2;
/*!
* Tpl motion estimation block 1d size. tpl_bsize_1d >= 16.
*/
uint8_t tpl_bsize_1d;
/*!
* Buffer to store the frame level tpl information for each frame in a gf
* group. tpl_stats_buffer[i] stores the tpl information of ith frame in a gf
* group
*/
TplDepFrame tpl_stats_buffer[MAX_LENGTH_TPL_FRAME_STATS];
/*!
* Buffer to store tpl stats at block granularity.
* tpl_stats_pool[i][j] stores the tpl stats of jth block of ith frame in a gf
* group.
*/
TplDepStats *tpl_stats_pool[MAX_LAG_BUFFERS];
/*!
* Buffer to store tpl reconstructed frame.
* tpl_rec_pool[i] stores the reconstructed frame of ith frame in a gf group.
*/
YV12_BUFFER_CONFIG tpl_rec_pool[MAX_LAG_BUFFERS];
/*!
* Pointer to tpl_stats_buffer.
*/
TplDepFrame *tpl_frame;
/*!
* Scale factors for the current frame.
*/
struct scale_factors sf;
/*!
* GF group index of the current frame.
*/
int frame_idx;
/*!
* Array of pointers to the frame buffers holding the source frame.
* src_ref_frame[i] stores the pointer to the source frame of the ith
* reference frame type.
*/
const YV12_BUFFER_CONFIG *src_ref_frame[INTER_REFS_PER_FRAME];
/*!
* Array of pointers to the frame buffers holding the tpl reconstructed frame.
* ref_frame[i] stores the pointer to the tpl reconstructed frame of the ith
* reference frame type.
*/
const YV12_BUFFER_CONFIG *ref_frame[INTER_REFS_PER_FRAME];
/*!
* Parameters related to synchronization for top-right dependency in row based
* multi-threading of tpl
*/
AV1TplRowMultiThreadSync tpl_mt_sync;
/*!
* Frame border for tpl frame.
*/
int border_in_pixels;
/*!
* Skip tpl setup when tpl data from gop length decision can be reused.
*/
int skip_tpl_setup_stats;
} TplParams;
/*!\brief Allocate buffers used by tpl model
*
* \param[in] Top-level encode/decode structure
* \param[in] lag_in_frames number of lookahead frames
*
* \param[out] tpl_data tpl data structure
*/
void av1_setup_tpl_buffers(AV1_COMMON *const cm, TplParams *const tpl_data,
int lag_in_frames);
/*!\brief Implements temporal dependency modelling for a GOP (GF/ARF
* group) and selects between 16 and 32 frame GOP structure.
*
*\ingroup tpl_modelling
*
* \param[in] cpi Top - level encoder instance structure
* \param[in] gop_eval Flag if it is in the GOP length decision stage
* \param[in] frame_params Per frame encoding parameters
* \param[in] frame_input Input frame buffers
*
* \return Indicates whether or not we should use a longer GOP length.
*/
int av1_tpl_setup_stats(struct AV1_COMP *cpi, int gop_eval,
const struct EncodeFrameParams *const frame_params,
const struct EncodeFrameInput *const frame_input);
/*!\cond */
int av1_tpl_ptr_pos(int mi_row, int mi_col, int stride, uint8_t right_shift);
void av1_init_tpl_stats(TplParams *const tpl_data);
void av1_tpl_rdmult_setup(struct AV1_COMP *cpi);
void av1_tpl_rdmult_setup_sb(struct AV1_COMP *cpi, MACROBLOCK *const x,
BLOCK_SIZE sb_size, int mi_row, int mi_col);
void av1_mc_flow_dispenser_row(struct AV1_COMP *cpi,
TplTxfmStats *tpl_txfm_stats, MACROBLOCK *x,
int mi_row, BLOCK_SIZE bsize, TX_SIZE tx_size);
/*!\brief Compute the entropy of an exponential probability distribution
* function (pdf) subjected to uniform quantization.
*
* pdf(x) = b*exp(-b*x)
*
*\ingroup tpl_modelling
*
* \param[in] q_step quantizer step size
* \param[in] b parameter of exponential distribution
*
* \return entropy cost
*/
double av1_exponential_entropy(double q_step, double b);
/*!\brief Compute the entropy of a Laplace probability distribution
* function (pdf) subjected to non-uniform quantization.
*
* pdf(x) = 0.5*b*exp(-0.5*b*|x|)
*
*\ingroup tpl_modelling
*
* \param[in] q_step quantizer step size for non-zero bins
* \param[in] b parameter of Laplace distribution
* \param[in] zero_bin_ratio zero bin's size is zero_bin_ratio * q_step
*
* \return entropy cost
*/
double av1_laplace_entropy(double q_step, double b, double zero_bin_ratio);
/*!\brief Compute the frame rate using transform block stats
*
* Assume each position i in the transform block is of Laplace distribution
* with mean absolute deviation abs_coeff_mean[i]
*
* Then we can use av1_laplace_entropy() to compute the expected frame
* rate.
*
*\ingroup tpl_modelling
*
* \param[in] q_index quantizer index
* \param[in] block_count number of transform blocks
* \param[in] abs_coeff_mean array of mean absolute deviation
* \param[in] coeff_num number of coefficients per transform block
*
* \return expected frame rate
*/
double av1_laplace_estimate_frame_rate(int q_index, int block_count,
const double *abs_coeff_mean,
int coeff_num);
/*!\brief Init data structure storing transform stats
*
*\ingroup tpl_modelling
*
* \param[in] tpl_frame pointer of tpl frame data structure
* \param[in] tpl_bsize_1d length of the side of a square transform block
*
*/
void av1_tpl_stats_init_txfm_stats(TplDepFrame *tpl_frame, int tpl_bsize_1d);
/*!\brief Estimate coefficient entropy using Laplace dsitribution
*
*\ingroup tpl_modelling
*
* This function is equivalent to -log2(laplace_prob()), where laplace_prob() is
* defined in tpl_model_test.cc
*
* \param[in] q_step quantizer step size without any scaling
* \param[in] b mean absolute deviation of Laplace distribution
* \param[in] zero_bin_ratio zero bin's size is zero_bin_ratio * q_step
* \param[in] qcoeff quantized coefficient
*
* \return estimated coefficient entropy
*
*/
double av1_estimate_coeff_entropy(double q_step, double b,
double zero_bin_ratio, int qcoeff);
/*!\brief Estimate entropy of a transform block using Laplace dsitribution
*
*\ingroup tpl_modelling
*
* \param[in] q_index quantizer index
* \param[in] abs_coeff_mean array of mean absolute deviations
* \param[in] qcoeff_arr array of quantized coefficients
* \param[in] coeff_num number of coefficients per transform block
*
* \return estimated transform block entropy
*
*/
double av1_estimate_txfm_block_entropy(int q_index,
const double *abs_coeff_mean,
int *qcoeff_arr, int coeff_num);
// TODO(angiebird): Add doxygen description here.
int64_t av1_delta_rate_cost(int64_t delta_rate, int64_t recrf_dist,
int64_t srcrf_dist, int pix_num);
/*!\brief Compute the overlap area between two blocks with the same size
*
*\ingroup tpl_modelling
*
* If there is no overlap, this function should return zero.
*
* \param[in] row_a row position of the first block
* \param[in] col_a column position of the first block
* \param[in] row_b row position of the second block
* \param[in] col_b column position of the second block
* \param[in] width width shared by the two blocks
* \param[in] height height shared by the two blocks
*
* \return overlap area of the two blocks
*/
int av1_get_overlap_area(int row_a, int col_a, int row_b, int col_b, int width,
int height);
/*!\endcond */
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_TPL_MODEL_H_