566 строки
23 KiB
C
566 строки
23 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <limits.h>
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#include <math.h>
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#include "vp10/common/seg_common.h"
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#include "vp10/encoder/aq_cyclicrefresh.h"
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#include "vp10/encoder/ratectrl.h"
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#include "vp10/encoder/segmentation.h"
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#include "vpx_dsp/vpx_dsp_common.h"
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#include "vpx_ports/system_state.h"
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struct CYCLIC_REFRESH {
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// Percentage of blocks per frame that are targeted as candidates
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// for cyclic refresh.
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int percent_refresh;
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// Maximum q-delta as percentage of base q.
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int max_qdelta_perc;
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// Superblock starting index for cycling through the frame.
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int sb_index;
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// Controls how long block will need to wait to be refreshed again, in
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// excess of the cycle time, i.e., in the case of all zero motion, block
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// will be refreshed every (100/percent_refresh + time_for_refresh) frames.
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int time_for_refresh;
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// Target number of (8x8) blocks that are set for delta-q.
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int target_num_seg_blocks;
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// Actual number of (8x8) blocks that were applied delta-q.
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int actual_num_seg1_blocks;
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int actual_num_seg2_blocks;
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// RD mult. parameters for segment 1.
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int rdmult;
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// Cyclic refresh map.
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signed char *map;
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// Map of the last q a block was coded at.
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uint8_t *last_coded_q_map;
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// Thresholds applied to the projected rate/distortion of the coding block,
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// when deciding whether block should be refreshed.
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int64_t thresh_rate_sb;
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int64_t thresh_dist_sb;
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// Threshold applied to the motion vector (in units of 1/8 pel) of the
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// coding block, when deciding whether block should be refreshed.
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int16_t motion_thresh;
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// Rate target ratio to set q delta.
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double rate_ratio_qdelta;
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// Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
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int rate_boost_fac;
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double low_content_avg;
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int qindex_delta[3];
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};
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CYCLIC_REFRESH *vp10_cyclic_refresh_alloc(int mi_rows, int mi_cols) {
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size_t last_coded_q_map_size;
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CYCLIC_REFRESH *const cr = vpx_calloc(1, sizeof(*cr));
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if (cr == NULL)
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return NULL;
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cr->map = vpx_calloc(mi_rows * mi_cols, sizeof(*cr->map));
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if (cr->map == NULL) {
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vp10_cyclic_refresh_free(cr);
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return NULL;
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}
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last_coded_q_map_size = mi_rows * mi_cols * sizeof(*cr->last_coded_q_map);
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cr->last_coded_q_map = vpx_malloc(last_coded_q_map_size);
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if (cr->last_coded_q_map == NULL) {
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vp10_cyclic_refresh_free(cr);
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return NULL;
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}
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assert(MAXQ <= 255);
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memset(cr->last_coded_q_map, MAXQ, last_coded_q_map_size);
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return cr;
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}
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void vp10_cyclic_refresh_free(CYCLIC_REFRESH *cr) {
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vpx_free(cr->map);
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vpx_free(cr->last_coded_q_map);
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vpx_free(cr);
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}
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// Check if we should turn off cyclic refresh based on bitrate condition.
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static int apply_cyclic_refresh_bitrate(const VP10_COMMON *cm,
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const RATE_CONTROL *rc) {
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// Turn off cyclic refresh if bits available per frame is not sufficiently
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// larger than bit cost of segmentation. Segment map bit cost should scale
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// with number of seg blocks, so compare available bits to number of blocks.
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// Average bits available per frame = avg_frame_bandwidth
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// Number of (8x8) blocks in frame = mi_rows * mi_cols;
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const float factor = 0.25;
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const int number_blocks = cm->mi_rows * cm->mi_cols;
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// The condition below corresponds to turning off at target bitrates:
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// (at 30fps), ~12kbps for CIF, 36kbps for VGA, 100kps for HD/720p.
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// Also turn off at very small frame sizes, to avoid too large fraction of
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// superblocks to be refreshed per frame. Threshold below is less than QCIF.
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if (rc->avg_frame_bandwidth < factor * number_blocks ||
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number_blocks / 64 < 5)
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return 0;
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else
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return 1;
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}
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// Check if this coding block, of size bsize, should be considered for refresh
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// (lower-qp coding). Decision can be based on various factors, such as
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// size of the coding block (i.e., below min_block size rejected), coding
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// mode, and rate/distortion.
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static int candidate_refresh_aq(const CYCLIC_REFRESH *cr,
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const MB_MODE_INFO *mbmi,
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int64_t rate,
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int64_t dist,
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int bsize) {
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MV mv = mbmi->mv[0].as_mv;
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// Reject the block for lower-qp coding if projected distortion
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// is above the threshold, and any of the following is true:
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// 1) mode uses large mv
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// 2) mode is an intra-mode
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// Otherwise accept for refresh.
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if (dist > cr->thresh_dist_sb &&
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(mv.row > cr->motion_thresh || mv.row < -cr->motion_thresh ||
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mv.col > cr->motion_thresh || mv.col < -cr->motion_thresh ||
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!is_inter_block(mbmi)))
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return CR_SEGMENT_ID_BASE;
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else if (bsize >= BLOCK_16X16 &&
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rate < cr->thresh_rate_sb &&
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is_inter_block(mbmi) &&
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mbmi->mv[0].as_int == 0 &&
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cr->rate_boost_fac > 10)
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// More aggressive delta-q for bigger blocks with zero motion.
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return CR_SEGMENT_ID_BOOST2;
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else
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return CR_SEGMENT_ID_BOOST1;
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}
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// Compute delta-q for the segment.
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static int compute_deltaq(const VP10_COMP *cpi, int q, double rate_factor) {
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const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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const RATE_CONTROL *const rc = &cpi->rc;
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int deltaq = vp10_compute_qdelta_by_rate(rc, cpi->common.frame_type,
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q, rate_factor,
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cpi->common.bit_depth);
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if ((-deltaq) > cr->max_qdelta_perc * q / 100) {
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deltaq = -cr->max_qdelta_perc * q / 100;
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}
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return deltaq;
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}
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// For the just encoded frame, estimate the bits, incorporating the delta-q
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// from non-base segment. For now ignore effect of multiple segments
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// (with different delta-q). Note this function is called in the postencode
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// (called from rc_update_rate_correction_factors()).
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int vp10_cyclic_refresh_estimate_bits_at_q(const VP10_COMP *cpi,
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double correction_factor) {
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const VP10_COMMON *const cm = &cpi->common;
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const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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int estimated_bits;
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int mbs = cm->MBs;
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int num8x8bl = mbs << 2;
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// Weight for non-base segments: use actual number of blocks refreshed in
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// previous/just encoded frame. Note number of blocks here is in 8x8 units.
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double weight_segment1 = (double)cr->actual_num_seg1_blocks / num8x8bl;
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double weight_segment2 = (double)cr->actual_num_seg2_blocks / num8x8bl;
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// Take segment weighted average for estimated bits.
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estimated_bits = (int)((1.0 - weight_segment1 - weight_segment2) *
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vp10_estimate_bits_at_q(cm->frame_type, cm->base_qindex, mbs,
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correction_factor, cm->bit_depth) +
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weight_segment1 *
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vp10_estimate_bits_at_q(cm->frame_type,
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cm->base_qindex + cr->qindex_delta[1], mbs,
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correction_factor, cm->bit_depth) +
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weight_segment2 *
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vp10_estimate_bits_at_q(cm->frame_type,
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cm->base_qindex + cr->qindex_delta[2], mbs,
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correction_factor, cm->bit_depth));
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return estimated_bits;
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}
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// Prior to encoding the frame, estimate the bits per mb, for a given q = i and
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// a corresponding delta-q (for segment 1). This function is called in the
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// rc_regulate_q() to set the base qp index.
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// Note: the segment map is set to either 0/CR_SEGMENT_ID_BASE (no refresh) or
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// to 1/CR_SEGMENT_ID_BOOST1 (refresh) for each superblock, prior to encoding.
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int vp10_cyclic_refresh_rc_bits_per_mb(const VP10_COMP *cpi, int i,
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double correction_factor) {
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const VP10_COMMON *const cm = &cpi->common;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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int bits_per_mb;
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int num8x8bl = cm->MBs << 2;
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// Weight for segment prior to encoding: take the average of the target
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// number for the frame to be encoded and the actual from the previous frame.
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double weight_segment = (double)((cr->target_num_seg_blocks +
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cr->actual_num_seg1_blocks + cr->actual_num_seg2_blocks) >> 1) /
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num8x8bl;
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// Compute delta-q corresponding to qindex i.
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int deltaq = compute_deltaq(cpi, i, cr->rate_ratio_qdelta);
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// Take segment weighted average for bits per mb.
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bits_per_mb = (int)((1.0 - weight_segment) *
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vp10_rc_bits_per_mb(cm->frame_type, i, correction_factor, cm->bit_depth) +
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weight_segment *
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vp10_rc_bits_per_mb(cm->frame_type, i + deltaq, correction_factor,
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cm->bit_depth));
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return bits_per_mb;
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}
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// Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
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// check if we should reset the segment_id, and update the cyclic_refresh map
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// and segmentation map.
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void vp10_cyclic_refresh_update_segment(VP10_COMP *const cpi,
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MB_MODE_INFO *const mbmi,
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int mi_row, int mi_col,
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BLOCK_SIZE bsize,
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int64_t rate,
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int64_t dist,
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int skip) {
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const VP10_COMMON *const cm = &cpi->common;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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const int bw = num_8x8_blocks_wide_lookup[bsize];
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const int bh = num_8x8_blocks_high_lookup[bsize];
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const int xmis = VPXMIN(cm->mi_cols - mi_col, bw);
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const int ymis = VPXMIN(cm->mi_rows - mi_row, bh);
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const int block_index = mi_row * cm->mi_cols + mi_col;
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const int refresh_this_block = candidate_refresh_aq(cr, mbmi, rate, dist,
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bsize);
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// Default is to not update the refresh map.
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int new_map_value = cr->map[block_index];
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int x = 0; int y = 0;
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// If this block is labeled for refresh, check if we should reset the
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// segment_id.
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if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
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mbmi->segment_id = refresh_this_block;
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// Reset segment_id if will be skipped.
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if (skip)
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mbmi->segment_id = CR_SEGMENT_ID_BASE;
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}
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// Update the cyclic refresh map, to be used for setting segmentation map
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// for the next frame. If the block will be refreshed this frame, mark it
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// as clean. The magnitude of the -ve influences how long before we consider
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// it for refresh again.
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if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
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new_map_value = -cr->time_for_refresh;
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} else if (refresh_this_block) {
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// Else if it is accepted as candidate for refresh, and has not already
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// been refreshed (marked as 1) then mark it as a candidate for cleanup
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// for future time (marked as 0), otherwise don't update it.
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if (cr->map[block_index] == 1)
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new_map_value = 0;
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} else {
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// Leave it marked as block that is not candidate for refresh.
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new_map_value = 1;
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}
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// Update entries in the cyclic refresh map with new_map_value, and
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// copy mbmi->segment_id into global segmentation map.
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for (y = 0; y < ymis; y++)
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for (x = 0; x < xmis; x++) {
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int map_offset = block_index + y * cm->mi_cols + x;
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cr->map[map_offset] = new_map_value;
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cpi->segmentation_map[map_offset] = mbmi->segment_id;
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// Inter skip blocks were clearly not coded at the current qindex, so
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// don't update the map for them. For cases where motion is non-zero or
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// the reference frame isn't the previous frame, the previous value in
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// the map for this spatial location is not entirely correct.
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if (!is_inter_block(mbmi) || !skip)
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cr->last_coded_q_map[map_offset] = clamp(
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cm->base_qindex + cr->qindex_delta[mbmi->segment_id], 0, MAXQ);
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}
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}
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// Update the actual number of blocks that were applied the segment delta q.
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void vp10_cyclic_refresh_postencode(VP10_COMP *const cpi) {
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VP10_COMMON *const cm = &cpi->common;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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unsigned char *const seg_map = cpi->segmentation_map;
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int mi_row, mi_col;
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cr->actual_num_seg1_blocks = 0;
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cr->actual_num_seg2_blocks = 0;
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for (mi_row = 0; mi_row < cm->mi_rows; mi_row++)
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for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
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if (cyclic_refresh_segment_id(
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seg_map[mi_row * cm->mi_cols + mi_col]) == CR_SEGMENT_ID_BOOST1)
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cr->actual_num_seg1_blocks++;
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else if (cyclic_refresh_segment_id(
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seg_map[mi_row * cm->mi_cols + mi_col]) == CR_SEGMENT_ID_BOOST2)
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cr->actual_num_seg2_blocks++;
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}
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}
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// Set golden frame update interval, for 1 pass CBR mode.
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void vp10_cyclic_refresh_set_golden_update(VP10_COMP *const cpi) {
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RATE_CONTROL *const rc = &cpi->rc;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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// Set minimum gf_interval for GF update to a multiple (== 2) of refresh
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// period. Depending on past encoding stats, GF flag may be reset and update
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// may not occur until next baseline_gf_interval.
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if (cr->percent_refresh > 0)
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rc->baseline_gf_interval = 4 * (100 / cr->percent_refresh);
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else
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rc->baseline_gf_interval = 40;
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}
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// Update some encoding stats (from the just encoded frame). If this frame's
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// background has high motion, refresh the golden frame. Otherwise, if the
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// golden reference is to be updated check if we should NOT update the golden
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// ref.
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void vp10_cyclic_refresh_check_golden_update(VP10_COMP *const cpi) {
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VP10_COMMON *const cm = &cpi->common;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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int mi_row, mi_col;
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double fraction_low = 0.0;
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int low_content_frame = 0;
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MODE_INFO **mi = cm->mi_grid_visible;
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RATE_CONTROL *const rc = &cpi->rc;
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const int rows = cm->mi_rows, cols = cm->mi_cols;
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int cnt1 = 0, cnt2 = 0;
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int force_gf_refresh = 0;
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for (mi_row = 0; mi_row < rows; mi_row++) {
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for (mi_col = 0; mi_col < cols; mi_col++) {
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int16_t abs_mvr = mi[0]->mbmi.mv[0].as_mv.row >= 0 ?
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mi[0]->mbmi.mv[0].as_mv.row : -1 * mi[0]->mbmi.mv[0].as_mv.row;
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int16_t abs_mvc = mi[0]->mbmi.mv[0].as_mv.col >= 0 ?
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mi[0]->mbmi.mv[0].as_mv.col : -1 * mi[0]->mbmi.mv[0].as_mv.col;
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// Calculate the motion of the background.
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if (abs_mvr <= 16 && abs_mvc <= 16) {
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cnt1++;
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if (abs_mvr == 0 && abs_mvc == 0)
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cnt2++;
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}
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mi++;
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// Accumulate low_content_frame.
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if (cr->map[mi_row * cols + mi_col] < 1)
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low_content_frame++;
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}
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mi += 8;
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}
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// For video conference clips, if the background has high motion in current
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// frame because of the camera movement, set this frame as the golden frame.
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// Use 70% and 5% as the thresholds for golden frame refreshing.
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// Also, force this frame as a golden update frame if this frame will change
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// the resolution (resize_pending != 0).
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if (cpi->resize_pending != 0 ||
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(cnt1 * 10 > (70 * rows * cols) && cnt2 * 20 < cnt1)) {
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vp10_cyclic_refresh_set_golden_update(cpi);
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rc->frames_till_gf_update_due = rc->baseline_gf_interval;
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if (rc->frames_till_gf_update_due > rc->frames_to_key)
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rc->frames_till_gf_update_due = rc->frames_to_key;
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cpi->refresh_golden_frame = 1;
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force_gf_refresh = 1;
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}
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fraction_low =
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(double)low_content_frame / (rows * cols);
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// Update average.
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cr->low_content_avg = (fraction_low + 3 * cr->low_content_avg) / 4;
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if (!force_gf_refresh && cpi->refresh_golden_frame == 1) {
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// Don't update golden reference if the amount of low_content for the
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// current encoded frame is small, or if the recursive average of the
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// low_content over the update interval window falls below threshold.
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if (fraction_low < 0.8 || cr->low_content_avg < 0.7)
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cpi->refresh_golden_frame = 0;
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// Reset for next internal.
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cr->low_content_avg = fraction_low;
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}
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}
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// Update the segmentation map, and related quantities: cyclic refresh map,
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// refresh sb_index, and target number of blocks to be refreshed.
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// The map is set to either 0/CR_SEGMENT_ID_BASE (no refresh) or to
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// 1/CR_SEGMENT_ID_BOOST1 (refresh) for each superblock.
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// Blocks labeled as BOOST1 may later get set to BOOST2 (during the
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// encoding of the superblock).
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static void cyclic_refresh_update_map(VP10_COMP *const cpi) {
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VP10_COMMON *const cm = &cpi->common;
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CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
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unsigned char *const seg_map = cpi->segmentation_map;
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int i, block_count, bl_index, sb_rows, sb_cols, sbs_in_frame;
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int xmis, ymis, x, y;
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memset(seg_map, CR_SEGMENT_ID_BASE, cm->mi_rows * cm->mi_cols);
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sb_cols = (cm->mi_cols + cm->mib_size - 1) / cm->mib_size;
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sb_rows = (cm->mi_rows + cm->mib_size - 1) / cm->mib_size;
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sbs_in_frame = sb_cols * sb_rows;
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// Number of target blocks to get the q delta (segment 1).
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block_count = cr->percent_refresh * cm->mi_rows * cm->mi_cols / 100;
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// Set the segmentation map: cycle through the superblocks, starting at
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// cr->mb_index, and stopping when either block_count blocks have been found
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// to be refreshed, or we have passed through whole frame.
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assert(cr->sb_index < sbs_in_frame);
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i = cr->sb_index;
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cr->target_num_seg_blocks = 0;
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|
do {
|
|
int sum_map = 0;
|
|
// Get the mi_row/mi_col corresponding to superblock index i.
|
|
int sb_row_index = (i / sb_cols);
|
|
int sb_col_index = i - sb_row_index * sb_cols;
|
|
int mi_row = sb_row_index * cm->mib_size;
|
|
int mi_col = sb_col_index * cm->mib_size;
|
|
int qindex_thresh =
|
|
cpi->oxcf.content == VP9E_CONTENT_SCREEN
|
|
? vp10_get_qindex(&cm->seg, CR_SEGMENT_ID_BOOST2, cm->base_qindex)
|
|
: 0;
|
|
assert(mi_row >= 0 && mi_row < cm->mi_rows);
|
|
assert(mi_col >= 0 && mi_col < cm->mi_cols);
|
|
bl_index = mi_row * cm->mi_cols + mi_col;
|
|
// Loop through all MI blocks in superblock and update map.
|
|
xmis = VPXMIN(cm->mi_cols - mi_col, cm->mib_size);
|
|
ymis = VPXMIN(cm->mi_rows - mi_row, cm->mib_size);
|
|
for (y = 0; y < ymis; y++) {
|
|
for (x = 0; x < xmis; x++) {
|
|
const int bl_index2 = bl_index + y * cm->mi_cols + x;
|
|
// If the block is as a candidate for clean up then mark it
|
|
// for possible boost/refresh (segment 1). The segment id may get
|
|
// reset to 0 later if block gets coded anything other than ZEROMV.
|
|
if (cr->map[bl_index2] == 0) {
|
|
if (cr->last_coded_q_map[bl_index2] > qindex_thresh)
|
|
sum_map++;
|
|
} else if (cr->map[bl_index2] < 0) {
|
|
cr->map[bl_index2]++;
|
|
}
|
|
}
|
|
}
|
|
// Enforce constant segment over superblock.
|
|
// If segment is at least half of superblock, set to 1.
|
|
if (sum_map >= xmis * ymis / 2) {
|
|
for (y = 0; y < ymis; y++)
|
|
for (x = 0; x < xmis; x++) {
|
|
seg_map[bl_index + y * cm->mi_cols + x] = CR_SEGMENT_ID_BOOST1;
|
|
}
|
|
cr->target_num_seg_blocks += xmis * ymis;
|
|
}
|
|
i++;
|
|
if (i == sbs_in_frame) {
|
|
i = 0;
|
|
}
|
|
} while (cr->target_num_seg_blocks < block_count && i != cr->sb_index);
|
|
cr->sb_index = i;
|
|
}
|
|
|
|
// Set cyclic refresh parameters.
|
|
void vp10_cyclic_refresh_update_parameters(VP10_COMP *const cpi) {
|
|
const RATE_CONTROL *const rc = &cpi->rc;
|
|
const VP10_COMMON *const cm = &cpi->common;
|
|
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
|
|
cr->percent_refresh = 10;
|
|
cr->max_qdelta_perc = 50;
|
|
cr->time_for_refresh = 0;
|
|
// Use larger delta-qp (increase rate_ratio_qdelta) for first few (~4)
|
|
// periods of the refresh cycle, after a key frame.
|
|
if (rc->frames_since_key < 4 * cr->percent_refresh)
|
|
cr->rate_ratio_qdelta = 3.0;
|
|
else
|
|
cr->rate_ratio_qdelta = 2.0;
|
|
// Adjust some parameters for low resolutions at low bitrates.
|
|
if (cm->width <= 352 &&
|
|
cm->height <= 288 &&
|
|
rc->avg_frame_bandwidth < 3400) {
|
|
cr->motion_thresh = 4;
|
|
cr->rate_boost_fac = 10;
|
|
} else {
|
|
cr->motion_thresh = 32;
|
|
cr->rate_boost_fac = 17;
|
|
}
|
|
}
|
|
|
|
// Setup cyclic background refresh: set delta q and segmentation map.
|
|
void vp10_cyclic_refresh_setup(VP10_COMP *const cpi) {
|
|
VP10_COMMON *const cm = &cpi->common;
|
|
const RATE_CONTROL *const rc = &cpi->rc;
|
|
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
|
|
struct segmentation *const seg = &cm->seg;
|
|
const int apply_cyclic_refresh = apply_cyclic_refresh_bitrate(cm, rc);
|
|
if (cm->current_video_frame == 0)
|
|
cr->low_content_avg = 0.0;
|
|
// Don't apply refresh on key frame or enhancement layer frames.
|
|
if (!apply_cyclic_refresh || cm->frame_type == KEY_FRAME) {
|
|
// Set segmentation map to 0 and disable.
|
|
unsigned char *const seg_map = cpi->segmentation_map;
|
|
memset(seg_map, 0, cm->mi_rows * cm->mi_cols);
|
|
vp10_disable_segmentation(&cm->seg);
|
|
if (cm->frame_type == KEY_FRAME) {
|
|
memset(cr->last_coded_q_map, MAXQ,
|
|
cm->mi_rows * cm->mi_cols * sizeof(*cr->last_coded_q_map));
|
|
cr->sb_index = 0;
|
|
}
|
|
return;
|
|
} else {
|
|
int qindex_delta = 0;
|
|
int qindex2;
|
|
const double q = vp10_convert_qindex_to_q(cm->base_qindex, cm->bit_depth);
|
|
vpx_clear_system_state();
|
|
// Set rate threshold to some multiple (set to 2 for now) of the target
|
|
// rate (target is given by sb64_target_rate and scaled by 256).
|
|
cr->thresh_rate_sb = ((int64_t)(rc->sb64_target_rate) << 8) << 2;
|
|
// Distortion threshold, quadratic in Q, scale factor to be adjusted.
|
|
// q will not exceed 457, so (q * q) is within 32bit; see:
|
|
// vp10_convert_qindex_to_q(), vp10_ac_quant(), ac_qlookup*[].
|
|
cr->thresh_dist_sb = ((int64_t)(q * q)) << 2;
|
|
|
|
// Set up segmentation.
|
|
// Clear down the segment map.
|
|
vp10_enable_segmentation(&cm->seg);
|
|
vp10_clearall_segfeatures(seg);
|
|
// Select delta coding method.
|
|
seg->abs_delta = SEGMENT_DELTADATA;
|
|
|
|
// Note: setting temporal_update has no effect, as the seg-map coding method
|
|
// (temporal or spatial) is determined in vp10_choose_segmap_coding_method(),
|
|
// based on the coding cost of each method. For error_resilient mode on the
|
|
// last_frame_seg_map is set to 0, so if temporal coding is used, it is
|
|
// relative to 0 previous map.
|
|
// seg->temporal_update = 0;
|
|
|
|
// Segment BASE "Q" feature is disabled so it defaults to the baseline Q.
|
|
vp10_disable_segfeature(seg, CR_SEGMENT_ID_BASE, SEG_LVL_ALT_Q);
|
|
// Use segment BOOST1 for in-frame Q adjustment.
|
|
vp10_enable_segfeature(seg, CR_SEGMENT_ID_BOOST1, SEG_LVL_ALT_Q);
|
|
// Use segment BOOST2 for more aggressive in-frame Q adjustment.
|
|
vp10_enable_segfeature(seg, CR_SEGMENT_ID_BOOST2, SEG_LVL_ALT_Q);
|
|
|
|
// Set the q delta for segment BOOST1.
|
|
qindex_delta = compute_deltaq(cpi, cm->base_qindex, cr->rate_ratio_qdelta);
|
|
cr->qindex_delta[1] = qindex_delta;
|
|
|
|
// Compute rd-mult for segment BOOST1.
|
|
qindex2 = clamp(cm->base_qindex + cm->y_dc_delta_q + qindex_delta, 0, MAXQ);
|
|
|
|
cr->rdmult = vp10_compute_rd_mult(cpi, qindex2);
|
|
|
|
vp10_set_segdata(seg, CR_SEGMENT_ID_BOOST1, SEG_LVL_ALT_Q, qindex_delta);
|
|
|
|
// Set a more aggressive (higher) q delta for segment BOOST2.
|
|
qindex_delta = compute_deltaq(
|
|
cpi, cm->base_qindex,
|
|
VPXMIN(CR_MAX_RATE_TARGET_RATIO,
|
|
0.1 * cr->rate_boost_fac * cr->rate_ratio_qdelta));
|
|
cr->qindex_delta[2] = qindex_delta;
|
|
vp10_set_segdata(seg, CR_SEGMENT_ID_BOOST2, SEG_LVL_ALT_Q, qindex_delta);
|
|
|
|
// Update the segmentation and refresh map.
|
|
cyclic_refresh_update_map(cpi);
|
|
}
|
|
}
|
|
|
|
int vp10_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr) {
|
|
return cr->rdmult;
|
|
}
|
|
|
|
void vp10_cyclic_refresh_reset_resize(VP10_COMP *const cpi) {
|
|
const VP10_COMMON *const cm = &cpi->common;
|
|
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
|
|
memset(cr->map, 0, cm->mi_rows * cm->mi_cols);
|
|
cr->sb_index = 0;
|
|
cpi->refresh_golden_frame = 1;
|
|
}
|