ref: 5464395948a84f358f41568304e0c45b248acdf1
dir: /vp9/encoder/vp9_aq_cyclicrefresh.h/
/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
#define VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
#include "vpx/vpx_integer.h"
#include "vp9/common/vp9_blockd.h"
#include "vp9/encoder/vp9_block.h"
#include "vp9/encoder/vp9_skin_detection.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
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 (8x8) blocks that are set for delta-q.
int target_num_seg_blocks;
// Actual number of (8x8) blocks that were applied delta-q.
int actual_num_seg1_blocks;
int actual_num_seg2_blocks;
// RD mult. parameters for segment 1.
int rdmult;
// Cyclic refresh map.
signed char *map;
// Map of the last q a block was coded at.
uint8_t *last_coded_q_map;
// Thresholds applied to the projected rate/distortion of the coding block,
// when deciding whether block should be refreshed.
int64_t thresh_rate_sb;
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;
double low_content_avg;
int qindex_delta[3];
int reduce_refresh;
double weight_segment;
int apply_cyclic_refresh;
};
struct VP9_COMP;
typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols);
void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr);
// Estimate the bits, incorporating the delta-q from segment 1, after encoding
// the frame.
int vp9_cyclic_refresh_estimate_bits_at_q(const struct VP9_COMP *cpi,
double correction_factor);
// Estimate the bits per mb, for a given q = i and a corresponding delta-q
// (for segment 1), prior to encoding the frame.
int vp9_cyclic_refresh_rc_bits_per_mb(const struct VP9_COMP *cpi, int i,
double correction_factor);
// Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
// check if we should reset the segment_id, and update the cyclic_refresh map
// and segmentation map.
void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi,
MODE_INFO *const mi, int mi_row,
int mi_col, BLOCK_SIZE bsize,
int64_t rate, int64_t dist, int skip,
struct macroblock_plane *const p);
void vp9_cyclic_refresh_update_sb_postencode(struct VP9_COMP *const cpi,
const MODE_INFO *const mi,
int mi_row, int mi_col,
BLOCK_SIZE bsize);
// Update the segmentation map, and related quantities: cyclic refresh map,
// refresh sb_index, and target number of blocks to be refreshed.
void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi);
// From the just encoded frame: update the actual number of blocks that were
// applied the segment delta q, and the amount of low motion in the frame.
// Also check conditions for forcing golden update, or preventing golden
// update if the period is up.
void vp9_cyclic_refresh_postencode(struct VP9_COMP *const cpi);
// Set golden frame update interval, for non-svc 1 pass CBR mode.
void vp9_cyclic_refresh_set_golden_update(struct VP9_COMP *const cpi);
// Set/update global/frame level refresh parameters.
void vp9_cyclic_refresh_update_parameters(struct VP9_COMP *const cpi);
// Setup cyclic background refresh: set delta q and segmentation map.
void vp9_cyclic_refresh_setup(struct VP9_COMP *const cpi);
int vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr);
void vp9_cyclic_refresh_reset_resize(struct VP9_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 // VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_