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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.
+ */
+
+#include <limits.h>
+#include <math.h>
+
+#include "av1/common/seg_common.h"
+#include "av1/encoder/aq_cyclicrefresh.h"
+#include "av1/encoder/ratectrl.h"
+#include "av1/encoder/segmentation.h"
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom_ports/system_state.h"
+
+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.
+ int8_t *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];
+};
+
+CYCLIC_REFRESH *av1_cyclic_refresh_alloc(int mi_rows, int mi_cols) {
+ size_t last_coded_q_map_size;
+ CYCLIC_REFRESH *const cr = aom_calloc(1, sizeof(*cr));
+ if (cr == NULL) return NULL;
+
+ cr->map = aom_calloc(mi_rows * mi_cols, sizeof(*cr->map));
+ if (cr->map == NULL) {
+ av1_cyclic_refresh_free(cr);
+ return NULL;
+ }
+ last_coded_q_map_size = mi_rows * mi_cols * sizeof(*cr->last_coded_q_map);
+ cr->last_coded_q_map = aom_malloc(last_coded_q_map_size);
+ if (cr->last_coded_q_map == NULL) {
+ av1_cyclic_refresh_free(cr);
+ return NULL;
+ }
+ assert(MAXQ <= 255);
+ memset(cr->last_coded_q_map, MAXQ, last_coded_q_map_size);
+
+ return cr;
+}
+
+void av1_cyclic_refresh_free(CYCLIC_REFRESH *cr) {
+ if (cr != NULL) {
+ aom_free(cr->map);
+ aom_free(cr->last_coded_q_map);
+ aom_free(cr);
+ }
+}
+
+// Check if we should turn off cyclic refresh based on bitrate condition.
+static int apply_cyclic_refresh_bitrate(const AV1_COMMON *cm,
+ const RATE_CONTROL *rc) {
+ // Turn off cyclic refresh if bits available per frame is not sufficiently
+ // larger than bit cost of segmentation. Segment map bit cost should scale
+ // with number of seg blocks, so compare available bits to number of blocks.
+ // Average bits available per frame = avg_frame_bandwidth
+ // Number of (8x8) blocks in frame = mi_rows * mi_cols;
+ const float factor = 0.25;
+ const int number_blocks = cm->mi_rows * cm->mi_cols;
+ // The condition below corresponds to turning off at target bitrates:
+ // (at 30fps), ~12kbps for CIF, 36kbps for VGA, 100kps for HD/720p.
+ // Also turn off at very small frame sizes, to avoid too large fraction of
+ // superblocks to be refreshed per frame. Threshold below is less than QCIF.
+ if (rc->avg_frame_bandwidth < factor * number_blocks ||
+ number_blocks / 64 < 5)
+ return 0;
+ else
+ return 1;
+}
+
+// Check if this coding block, of size bsize, should be considered for refresh
+// (lower-qp coding). Decision can be based on various factors, such as
+// size of the coding block (i.e., below min_block size rejected), coding
+// mode, and rate/distortion.
+static int candidate_refresh_aq(const CYCLIC_REFRESH *cr,
+ const MB_MODE_INFO *mbmi, int64_t rate,
+ int64_t dist, int bsize) {
+ MV mv = mbmi->mv[0].as_mv;
+ // Reject the block for lower-qp coding if projected distortion
+ // is above the threshold, and any of the following is true:
+ // 1) mode uses large mv
+ // 2) mode is an intra-mode
+ // Otherwise accept for refresh.
+ if (dist > cr->thresh_dist_sb &&
+ (mv.row > cr->motion_thresh || mv.row < -cr->motion_thresh ||
+ mv.col > cr->motion_thresh || mv.col < -cr->motion_thresh ||
+ !is_inter_block(mbmi)))
+ return CR_SEGMENT_ID_BASE;
+ else if (bsize >= BLOCK_16X16 && rate < cr->thresh_rate_sb &&
+ is_inter_block(mbmi) && mbmi->mv[0].as_int == 0 &&
+ cr->rate_boost_fac > 10)
+ // More aggressive delta-q for bigger blocks with zero motion.
+ return CR_SEGMENT_ID_BOOST2;
+ else
+ return CR_SEGMENT_ID_BOOST1;
+}
+
+// Compute delta-q for the segment.
+static int compute_deltaq(const AV1_COMP *cpi, int q, double rate_factor) {
+ const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ const RATE_CONTROL *const rc = &cpi->rc;
+ int deltaq =
+ av1_compute_qdelta_by_rate(rc, cpi->common.frame_type, q, rate_factor,
+ cpi->common.seq_params.bit_depth);
+ if ((-deltaq) > cr->max_qdelta_perc * q / 100) {
+ deltaq = -cr->max_qdelta_perc * q / 100;
+ }
+ return deltaq;
+}
+
+// For the just encoded frame, estimate the bits, incorporating the delta-q
+// from non-base segment. For now ignore effect of multiple segments
+// (with different delta-q). Note this function is called in the postencode
+// (called from rc_update_rate_correction_factors()).
+int av1_cyclic_refresh_estimate_bits_at_q(const AV1_COMP *cpi,
+ double correction_factor) {
+ const AV1_COMMON *const cm = &cpi->common;
+ const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ int estimated_bits;
+ int mbs = cm->MBs;
+ int num8x8bl = mbs << 2;
+ // Weight for non-base segments: use actual number of blocks refreshed in
+ // previous/just encoded frame. Note number of blocks here is in 8x8 units.
+ double weight_segment1 = (double)cr->actual_num_seg1_blocks / num8x8bl;
+ double weight_segment2 = (double)cr->actual_num_seg2_blocks / num8x8bl;
+ // Take segment weighted average for estimated bits.
+ estimated_bits =
+ (int)((1.0 - weight_segment1 - weight_segment2) *
+ av1_estimate_bits_at_q(cm->frame_type, cm->base_qindex, mbs,
+ correction_factor,
+ cm->seq_params.bit_depth) +
+ weight_segment1 * av1_estimate_bits_at_q(
+ cm->frame_type,
+ cm->base_qindex + cr->qindex_delta[1], mbs,
+ correction_factor, cm->seq_params.bit_depth) +
+ weight_segment2 * av1_estimate_bits_at_q(
+ cm->frame_type,
+ cm->base_qindex + cr->qindex_delta[2], mbs,
+ correction_factor, cm->seq_params.bit_depth));
+ return estimated_bits;
+}
+
+// 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.
+int av1_cyclic_refresh_rc_bits_per_mb(const AV1_COMP *cpi, int i,
+ double correction_factor) {
+ const AV1_COMMON *const cm = &cpi->common;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ int bits_per_mb;
+ int num8x8bl = cm->MBs << 2;
+ // Weight for segment prior to encoding: take the average of the target
+ // number for the frame to be encoded and the actual from the previous frame.
+ double weight_segment =
+ (double)((cr->target_num_seg_blocks + cr->actual_num_seg1_blocks +
+ cr->actual_num_seg2_blocks) >>
+ 1) /
+ num8x8bl;
+ // Compute delta-q corresponding to qindex i.
+ int deltaq = compute_deltaq(cpi, i, cr->rate_ratio_qdelta);
+ // Take segment weighted average for bits per mb.
+ bits_per_mb =
+ (int)((1.0 - weight_segment) *
+ av1_rc_bits_per_mb(cm->frame_type, i, correction_factor,
+ cm->seq_params.bit_depth) +
+ weight_segment * av1_rc_bits_per_mb(cm->frame_type, i + deltaq,
+ correction_factor,
+ cm->seq_params.bit_depth));
+ return bits_per_mb;
+}
+
+// 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 av1_cyclic_refresh_update_segment(const 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) {
+ const AV1_COMMON *const cm = &cpi->common;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ const int bw = mi_size_wide[bsize];
+ const int bh = mi_size_high[bsize];
+ const int xmis = AOMMIN(cm->mi_cols - mi_col, bw);
+ const int ymis = AOMMIN(cm->mi_rows - mi_row, bh);
+ const int block_index = mi_row * cm->mi_cols + mi_col;
+ const int refresh_this_block =
+ candidate_refresh_aq(cr, mbmi, rate, dist, bsize);
+ // Default is to not update the refresh map.
+ int new_map_value = cr->map[block_index];
+ int x = 0;
+ int y = 0;
+
+ // If this block is labeled for refresh, check if we should reset the
+ // segment_id.
+ if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
+ mbmi->segment_id = refresh_this_block;
+ // Reset segment_id if will be skipped.
+ if (skip) mbmi->segment_id = CR_SEGMENT_ID_BASE;
+ }
+
+ // Update the cyclic refresh map, to be used for setting segmentation map
+ // for the next frame. If the block will be refreshed this frame, mark it
+ // as clean. The magnitude of the -ve influences how long before we consider
+ // it for refresh again.
+ if (cyclic_refresh_segment_id_boosted(mbmi->segment_id)) {
+ new_map_value = -cr->time_for_refresh;
+ } else if (refresh_this_block) {
+ // Else if it is accepted as candidate for refresh, and has not already
+ // been refreshed (marked as 1) then mark it as a candidate for cleanup
+ // for future time (marked as 0), otherwise don't update it.
+ if (cr->map[block_index] == 1) new_map_value = 0;
+ } else {
+ // Leave it marked as block that is not candidate for refresh.
+ new_map_value = 1;
+ }
+
+ // Update entries in the cyclic refresh map with new_map_value, and
+ // copy mbmi->segment_id into global segmentation map.
+ for (y = 0; y < ymis; y++)
+ for (x = 0; x < xmis; x++) {
+ int map_offset = block_index + y * cm->mi_cols + x;
+ cr->map[map_offset] = new_map_value;
+ cpi->segmentation_map[map_offset] = mbmi->segment_id;
+ // Inter skip blocks were clearly not coded at the current qindex, so
+ // don't update the map for them. For cases where motion is non-zero or
+ // the reference frame isn't the previous frame, the previous value in
+ // the map for this spatial location is not entirely correct.
+ if ((!is_inter_block(mbmi) || !skip) &&
+ mbmi->segment_id <= CR_SEGMENT_ID_BOOST2) {
+ cr->last_coded_q_map[map_offset] = clamp(
+ cm->base_qindex + cr->qindex_delta[mbmi->segment_id], 0, MAXQ);
+ } else if (is_inter_block(mbmi) && skip &&
+ mbmi->segment_id <= CR_SEGMENT_ID_BOOST2) {
+ cr->last_coded_q_map[map_offset] =
+ AOMMIN(clamp(cm->base_qindex + cr->qindex_delta[mbmi->segment_id],
+ 0, MAXQ),
+ cr->last_coded_q_map[map_offset]);
+ }
+ }
+}
+
+// Update the actual number of blocks that were applied the segment delta q.
+void av1_cyclic_refresh_postencode(AV1_COMP *const cpi) {
+ AV1_COMMON *const cm = &cpi->common;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ unsigned char *const seg_map = cpi->segmentation_map;
+ int mi_row, mi_col;
+ cr->actual_num_seg1_blocks = 0;
+ cr->actual_num_seg2_blocks = 0;
+ for (mi_row = 0; mi_row < cm->mi_rows; mi_row++)
+ for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
+ if (cyclic_refresh_segment_id(seg_map[mi_row * cm->mi_cols + mi_col]) ==
+ CR_SEGMENT_ID_BOOST1)
+ cr->actual_num_seg1_blocks++;
+ else if (cyclic_refresh_segment_id(
+ seg_map[mi_row * cm->mi_cols + mi_col]) ==
+ CR_SEGMENT_ID_BOOST2)
+ cr->actual_num_seg2_blocks++;
+ }
+}
+
+// Set golden frame update interval, for 1 pass CBR mode.
+void av1_cyclic_refresh_set_golden_update(AV1_COMP *const cpi) {
+ RATE_CONTROL *const rc = &cpi->rc;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ // Set minimum gf_interval for GF update to a multiple (== 2) of refresh
+ // period. Depending on past encoding stats, GF flag may be reset and update
+ // may not occur until next baseline_gf_interval.
+ if (cr->percent_refresh > 0)
+ rc->baseline_gf_interval = 4 * (100 / cr->percent_refresh);
+ else
+ rc->baseline_gf_interval = 40;
+}
+
+// Update some encoding stats (from the just encoded frame). If this frame's
+// background has high motion, refresh the golden frame. Otherwise, if the
+// golden reference is to be updated check if we should NOT update the golden
+// ref.
+void av1_cyclic_refresh_check_golden_update(AV1_COMP *const cpi) {
+ AV1_COMMON *const cm = &cpi->common;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ int mi_row, mi_col;
+ double fraction_low = 0.0;
+ int low_content_frame = 0;
+
+ MB_MODE_INFO **mi;
+ RATE_CONTROL *const rc = &cpi->rc;
+ const int rows = cm->mi_rows, cols = cm->mi_cols;
+ int cnt1 = 0, cnt2 = 0;
+ int force_gf_refresh = 0;
+
+ for (mi_row = 0; mi_row < rows; mi_row++) {
+ mi = cm->mi_grid_visible + mi_row * cm->mi_stride;
+
+ for (mi_col = 0; mi_col < cols; mi_col++) {
+ int16_t abs_mvr = mi[0]->mv[0].as_mv.row >= 0
+ ? mi[0]->mv[0].as_mv.row
+ : -1 * mi[0]->mv[0].as_mv.row;
+ int16_t abs_mvc = mi[0]->mv[0].as_mv.col >= 0
+ ? mi[0]->mv[0].as_mv.col
+ : -1 * mi[0]->mv[0].as_mv.col;
+
+ // Calculate the motion of the background.
+ if (abs_mvr <= 16 && abs_mvc <= 16) {
+ cnt1++;
+ if (abs_mvr == 0 && abs_mvc == 0) cnt2++;
+ }
+ mi++;
+
+ // Accumulate low_content_frame.
+ if (cr->map[mi_row * cols + mi_col] < 1) low_content_frame++;
+ }
+ }
+
+ // For video conference clips, if the background has high motion in current
+ // frame because of the camera movement, set this frame as the golden frame.
+ // Use 70% and 5% as the thresholds for golden frame refreshing.
+ if (cnt1 * 10 > (70 * rows * cols) && cnt2 * 20 < cnt1) {
+ av1_cyclic_refresh_set_golden_update(cpi);
+ rc->frames_till_gf_update_due = rc->baseline_gf_interval;
+
+ if (rc->frames_till_gf_update_due > rc->frames_to_key)
+ rc->frames_till_gf_update_due = rc->frames_to_key;
+ cpi->refresh_golden_frame = 1;
+ force_gf_refresh = 1;
+ }
+
+ fraction_low = (double)low_content_frame / (rows * cols);
+ // Update average.
+ cr->low_content_avg = (fraction_low + 3 * cr->low_content_avg) / 4;
+ if (!force_gf_refresh && cpi->refresh_golden_frame == 1) {
+ // Don't update golden reference if the amount of low_content for the
+ // current encoded frame is small, or if the recursive average of the
+ // low_content over the update interval window falls below threshold.
+ if (fraction_low < 0.8 || cr->low_content_avg < 0.7)
+ cpi->refresh_golden_frame = 0;
+ // Reset for next internal.
+ cr->low_content_avg = fraction_low;
+ }
+}
+
+// Update the segmentation map, and related quantities: cyclic refresh map,
+// refresh sb_index, and target number of blocks to be refreshed.
+// The map is set to either 0/CR_SEGMENT_ID_BASE (no refresh) or to
+// 1/CR_SEGMENT_ID_BOOST1 (refresh) for each superblock.
+// Blocks labeled as BOOST1 may later get set to BOOST2 (during the
+// encoding of the superblock).
+static void cyclic_refresh_update_map(AV1_COMP *const cpi) {
+ AV1_COMMON *const cm = &cpi->common;
+ CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
+ unsigned char *const seg_map = cpi->segmentation_map;
+ int i, block_count, bl_index, sb_rows, sb_cols, sbs_in_frame;
+ int xmis, ymis, x, y;
+ memset(seg_map, CR_SEGMENT_ID_BASE, cm->mi_rows * cm->mi_cols);
+ sb_cols =
+ (cm->mi_cols + cm->seq_params.mib_size - 1) / cm->seq_params.mib_size;
+ sb_rows =
+ (cm->mi_rows + cm->seq_params.mib_size - 1) / cm->seq_params.mib_size;
+ sbs_in_frame = sb_cols * sb_rows;
+ // Number of target blocks to get the q delta (segment 1).
+ block_count = cr->percent_refresh * cm->mi_rows * cm->mi_cols / 100;
+ // Set the segmentation map: cycle through the superblocks, starting at
+ // cr->mb_index, and stopping when either block_count blocks have been found
+ // to be refreshed, or we have passed through whole frame.
+ if (cr->sb_index >= sbs_in_frame) cr->sb_index = 0;
+ assert(cr->sb_index < sbs_in_frame);
+ i = cr->sb_index;
+ cr->target_num_seg_blocks = 0;
+ 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->seq_params.mib_size;
+ int mi_col = sb_col_index * cm->seq_params.mib_size;
+ int qindex_thresh =
+ cpi->oxcf.content == AOM_CONTENT_SCREEN
+ ? av1_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 = AOMMIN(cm->mi_cols - mi_col, cm->seq_params.mib_size);
+ ymis = AOMMIN(cm->mi_rows - mi_row, cm->seq_params.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 GLOBALMV.
+ 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 av1_cyclic_refresh_update_parameters(AV1_COMP *const cpi) {
+ const RATE_CONTROL *const rc = &cpi->rc;
+ const AV1_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 av1_cyclic_refresh_setup(AV1_COMP *const cpi) {
+ AV1_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);
+ int resolution_change =
+ cm->prev_frame && (cm->width != cm->prev_frame->width ||
+ cm->height != cm->prev_frame->height);
+ if (resolution_change) {
+ memset(cpi->segmentation_map, 0, cm->mi_rows * cm->mi_cols);
+ av1_clearall_segfeatures(seg);
+ aom_clear_system_state();
+ av1_disable_segmentation(seg);
+ return;
+ }
+ 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);
+ av1_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 =
+ av1_convert_qindex_to_q(cm->base_qindex, cm->seq_params.bit_depth);
+ aom_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:
+ // av1_convert_qindex_to_q(), av1_ac_quant(), ac_qlookup*[].
+ cr->thresh_dist_sb = ((int64_t)(q * q)) << 2;
+
+ // Set up segmentation.
+ // Clear down the segment map.
+ av1_enable_segmentation(&cm->seg);
+ av1_clearall_segfeatures(seg);
+
+ // Note: setting temporal_update has no effect, as the seg-map coding method
+ // (temporal or spatial) is determined in
+ // av1_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.
+ av1_disable_segfeature(seg, CR_SEGMENT_ID_BASE, SEG_LVL_ALT_Q);
+ // Use segment BOOST1 for in-frame Q adjustment.
+ av1_enable_segfeature(seg, CR_SEGMENT_ID_BOOST1, SEG_LVL_ALT_Q);
+ // Use segment BOOST2 for more aggressive in-frame Q adjustment.
+ av1_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 = av1_compute_rd_mult(cpi, qindex2);
+
+ av1_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,
+ AOMMIN(CR_MAX_RATE_TARGET_RATIO,
+ 0.1 * cr->rate_boost_fac * cr->rate_ratio_qdelta));
+ cr->qindex_delta[2] = qindex_delta;
+ av1_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 av1_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr) {
+ return cr->rdmult;
+}
+
+void av1_cyclic_refresh_reset_resize(AV1_COMP *const cpi) {
+ const AV1_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;
+}