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- /*
- * Copyright (c) 2010 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.
- */
- #include <assert.h>
- #include <limits.h>
- #include <math.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "./vpx_dsp_rtcd.h"
- #include "vpx_dsp/vpx_dsp_common.h"
- #include "vpx_mem/vpx_mem.h"
- #include "vpx_ports/mem.h"
- #include "vpx_ports/system_state.h"
- #include "vp9/common/vp9_alloccommon.h"
- #include "vp9/encoder/vp9_aq_cyclicrefresh.h"
- #include "vp9/common/vp9_common.h"
- #include "vp9/common/vp9_entropymode.h"
- #include "vp9/common/vp9_quant_common.h"
- #include "vp9/common/vp9_seg_common.h"
- #include "vp9/encoder/vp9_encodemv.h"
- #include "vp9/encoder/vp9_ratectrl.h"
- // Max rate per frame for 1080P and below encodes if no level requirement given.
- // For larger formats limit to MAX_MB_RATE bits per MB
- // 4Mbits is derived from the level requirement for level 4 (1080P 30) which
- // requires that HW can sustain a rate of 16Mbits over a 4 frame group.
- // If a lower level requirement is specified then this may over ride this value.
- #define MAX_MB_RATE 250
- #define MAXRATE_1080P 4000000
- #define DEFAULT_KF_BOOST 2000
- #define DEFAULT_GF_BOOST 2000
- #define LIMIT_QRANGE_FOR_ALTREF_AND_KEY 1
- #define MIN_BPB_FACTOR 0.005
- #define MAX_BPB_FACTOR 50
- #if CONFIG_VP9_HIGHBITDEPTH
- #define ASSIGN_MINQ_TABLE(bit_depth, name) \
- do { \
- switch (bit_depth) { \
- case VPX_BITS_8: name = name##_8; break; \
- case VPX_BITS_10: name = name##_10; break; \
- default: \
- assert(bit_depth == VPX_BITS_12); \
- name = name##_12; \
- break; \
- } \
- } while (0)
- #else
- #define ASSIGN_MINQ_TABLE(bit_depth, name) \
- do { \
- (void)bit_depth; \
- name = name##_8; \
- } while (0)
- #endif
- // Tables relating active max Q to active min Q
- static int kf_low_motion_minq_8[QINDEX_RANGE];
- static int kf_high_motion_minq_8[QINDEX_RANGE];
- static int arfgf_low_motion_minq_8[QINDEX_RANGE];
- static int arfgf_high_motion_minq_8[QINDEX_RANGE];
- static int inter_minq_8[QINDEX_RANGE];
- static int rtc_minq_8[QINDEX_RANGE];
- #if CONFIG_VP9_HIGHBITDEPTH
- static int kf_low_motion_minq_10[QINDEX_RANGE];
- static int kf_high_motion_minq_10[QINDEX_RANGE];
- static int arfgf_low_motion_minq_10[QINDEX_RANGE];
- static int arfgf_high_motion_minq_10[QINDEX_RANGE];
- static int inter_minq_10[QINDEX_RANGE];
- static int rtc_minq_10[QINDEX_RANGE];
- static int kf_low_motion_minq_12[QINDEX_RANGE];
- static int kf_high_motion_minq_12[QINDEX_RANGE];
- static int arfgf_low_motion_minq_12[QINDEX_RANGE];
- static int arfgf_high_motion_minq_12[QINDEX_RANGE];
- static int inter_minq_12[QINDEX_RANGE];
- static int rtc_minq_12[QINDEX_RANGE];
- #endif
- #ifdef AGGRESSIVE_VBR
- static int gf_high = 2400;
- static int gf_low = 400;
- static int kf_high = 4000;
- static int kf_low = 400;
- #else
- static int gf_high = 2000;
- static int gf_low = 400;
- static int kf_high = 4800;
- static int kf_low = 300;
- #endif
- // Functions to compute the active minq lookup table entries based on a
- // formulaic approach to facilitate easier adjustment of the Q tables.
- // The formulae were derived from computing a 3rd order polynomial best
- // fit to the original data (after plotting real maxq vs minq (not q index))
- static int get_minq_index(double maxq, double x3, double x2, double x1,
- vpx_bit_depth_t bit_depth) {
- int i;
- const double minqtarget = VPXMIN(((x3 * maxq + x2) * maxq + x1) * maxq, maxq);
- // Special case handling to deal with the step from q2.0
- // down to lossless mode represented by q 1.0.
- if (minqtarget <= 2.0) return 0;
- for (i = 0; i < QINDEX_RANGE; i++) {
- if (minqtarget <= vp9_convert_qindex_to_q(i, bit_depth)) return i;
- }
- return QINDEX_RANGE - 1;
- }
- static void init_minq_luts(int *kf_low_m, int *kf_high_m, int *arfgf_low,
- int *arfgf_high, int *inter, int *rtc,
- vpx_bit_depth_t bit_depth) {
- int i;
- for (i = 0; i < QINDEX_RANGE; i++) {
- const double maxq = vp9_convert_qindex_to_q(i, bit_depth);
- kf_low_m[i] = get_minq_index(maxq, 0.000001, -0.0004, 0.150, bit_depth);
- kf_high_m[i] = get_minq_index(maxq, 0.0000021, -0.00125, 0.45, bit_depth);
- #ifdef AGGRESSIVE_VBR
- arfgf_low[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.275, bit_depth);
- inter[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.80, bit_depth);
- #else
- arfgf_low[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.30, bit_depth);
- inter[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.70, bit_depth);
- #endif
- arfgf_high[i] = get_minq_index(maxq, 0.0000021, -0.00125, 0.55, bit_depth);
- rtc[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.70, bit_depth);
- }
- }
- void vp9_rc_init_minq_luts(void) {
- init_minq_luts(kf_low_motion_minq_8, kf_high_motion_minq_8,
- arfgf_low_motion_minq_8, arfgf_high_motion_minq_8,
- inter_minq_8, rtc_minq_8, VPX_BITS_8);
- #if CONFIG_VP9_HIGHBITDEPTH
- init_minq_luts(kf_low_motion_minq_10, kf_high_motion_minq_10,
- arfgf_low_motion_minq_10, arfgf_high_motion_minq_10,
- inter_minq_10, rtc_minq_10, VPX_BITS_10);
- init_minq_luts(kf_low_motion_minq_12, kf_high_motion_minq_12,
- arfgf_low_motion_minq_12, arfgf_high_motion_minq_12,
- inter_minq_12, rtc_minq_12, VPX_BITS_12);
- #endif
- }
- // These functions use formulaic calculations to make playing with the
- // quantizer tables easier. If necessary they can be replaced by lookup
- // tables if and when things settle down in the experimental bitstream
- double vp9_convert_qindex_to_q(int qindex, vpx_bit_depth_t bit_depth) {
- // Convert the index to a real Q value (scaled down to match old Q values)
- #if CONFIG_VP9_HIGHBITDEPTH
- switch (bit_depth) {
- case VPX_BITS_8: return vp9_ac_quant(qindex, 0, bit_depth) / 4.0;
- case VPX_BITS_10: return vp9_ac_quant(qindex, 0, bit_depth) / 16.0;
- default:
- assert(bit_depth == VPX_BITS_12);
- return vp9_ac_quant(qindex, 0, bit_depth) / 64.0;
- }
- #else
- return vp9_ac_quant(qindex, 0, bit_depth) / 4.0;
- #endif
- }
- int vp9_convert_q_to_qindex(double q_val, vpx_bit_depth_t bit_depth) {
- int i;
- for (i = 0; i < QINDEX_RANGE; ++i)
- if (vp9_convert_qindex_to_q(i, bit_depth) >= q_val) break;
- if (i == QINDEX_RANGE) i--;
- return i;
- }
- int vp9_rc_bits_per_mb(FRAME_TYPE frame_type, int qindex,
- double correction_factor, vpx_bit_depth_t bit_depth) {
- const double q = vp9_convert_qindex_to_q(qindex, bit_depth);
- int enumerator = frame_type == KEY_FRAME ? 2700000 : 1800000;
- assert(correction_factor <= MAX_BPB_FACTOR &&
- correction_factor >= MIN_BPB_FACTOR);
- // q based adjustment to baseline enumerator
- enumerator += (int)(enumerator * q) >> 12;
- return (int)(enumerator * correction_factor / q);
- }
- int vp9_estimate_bits_at_q(FRAME_TYPE frame_type, int q, int mbs,
- double correction_factor,
- vpx_bit_depth_t bit_depth) {
- const int bpm =
- (int)(vp9_rc_bits_per_mb(frame_type, q, correction_factor, bit_depth));
- return VPXMAX(FRAME_OVERHEAD_BITS,
- (int)(((uint64_t)bpm * mbs) >> BPER_MB_NORMBITS));
- }
- int vp9_rc_clamp_pframe_target_size(const VP9_COMP *const cpi, int target) {
- const RATE_CONTROL *rc = &cpi->rc;
- const VP9EncoderConfig *oxcf = &cpi->oxcf;
- const int min_frame_target =
- VPXMAX(rc->min_frame_bandwidth, rc->avg_frame_bandwidth >> 5);
- if (target < min_frame_target) target = min_frame_target;
- if (cpi->refresh_golden_frame && rc->is_src_frame_alt_ref) {
- // If there is an active ARF at this location use the minimum
- // bits on this frame even if it is a constructed arf.
- // The active maximum quantizer insures that an appropriate
- // number of bits will be spent if needed for constructed ARFs.
- target = min_frame_target;
- }
- // Clip the frame target to the maximum allowed value.
- if (target > rc->max_frame_bandwidth) target = rc->max_frame_bandwidth;
- if (oxcf->rc_max_inter_bitrate_pct) {
- const int max_rate =
- rc->avg_frame_bandwidth * oxcf->rc_max_inter_bitrate_pct / 100;
- target = VPXMIN(target, max_rate);
- }
- return target;
- }
- int vp9_rc_clamp_iframe_target_size(const VP9_COMP *const cpi, int target) {
- const RATE_CONTROL *rc = &cpi->rc;
- const VP9EncoderConfig *oxcf = &cpi->oxcf;
- if (oxcf->rc_max_intra_bitrate_pct) {
- const int max_rate =
- rc->avg_frame_bandwidth * oxcf->rc_max_intra_bitrate_pct / 100;
- target = VPXMIN(target, max_rate);
- }
- if (target > rc->max_frame_bandwidth) target = rc->max_frame_bandwidth;
- return target;
- }
- // TODO(marpan/jianj): bits_off_target and buffer_level are used in the saame
- // way for CBR mode, for the buffering updates below. Look into removing one
- // of these (i.e., bits_off_target).
- // Update the buffer level before encoding with the per-frame-bandwidth,
- static void update_buffer_level_preencode(VP9_COMP *cpi) {
- RATE_CONTROL *const rc = &cpi->rc;
- rc->bits_off_target += rc->avg_frame_bandwidth;
- // Clip the buffer level to the maximum specified buffer size.
- rc->bits_off_target = VPXMIN(rc->bits_off_target, rc->maximum_buffer_size);
- rc->buffer_level = rc->bits_off_target;
- }
- // Update the buffer level before encoding with the per-frame-bandwidth
- // for SVC. The current and all upper temporal layers are updated, needed
- // for the layered rate control which involves cumulative buffer levels for
- // the temporal layers. Allow for using the timestamp(pts) delta for the
- // framerate when the set_ref_frame_config is used.
- static void update_buffer_level_svc_preencode(VP9_COMP *cpi) {
- SVC *const svc = &cpi->svc;
- int i;
- // Set this to 1 to use timestamp delta for "framerate" under
- // ref_frame_config usage.
- int use_timestamp = 1;
- const int64_t ts_delta =
- svc->time_stamp_superframe - svc->time_stamp_prev[svc->spatial_layer_id];
- for (i = svc->temporal_layer_id; i < svc->number_temporal_layers; ++i) {
- const int layer =
- LAYER_IDS_TO_IDX(svc->spatial_layer_id, i, svc->number_temporal_layers);
- LAYER_CONTEXT *const lc = &svc->layer_context[layer];
- RATE_CONTROL *const lrc = &lc->rc;
- if (use_timestamp && cpi->svc.use_set_ref_frame_config &&
- svc->number_temporal_layers == 1 && ts_delta > 0 &&
- svc->current_superframe > 0) {
- // TODO(marpan): This may need to be modified for temporal layers.
- const double framerate_pts = 10000000.0 / ts_delta;
- lrc->bits_off_target += (int)(lc->target_bandwidth / framerate_pts);
- } else {
- lrc->bits_off_target += (int)(lc->target_bandwidth / lc->framerate);
- }
- // Clip buffer level to maximum buffer size for the layer.
- lrc->bits_off_target =
- VPXMIN(lrc->bits_off_target, lrc->maximum_buffer_size);
- lrc->buffer_level = lrc->bits_off_target;
- if (i == svc->temporal_layer_id) {
- cpi->rc.bits_off_target = lrc->bits_off_target;
- cpi->rc.buffer_level = lrc->buffer_level;
- }
- }
- }
- // Update the buffer level for higher temporal layers, given the encoded current
- // temporal layer.
- static void update_layer_buffer_level_postencode(SVC *svc,
- int encoded_frame_size) {
- int i = 0;
- const int current_temporal_layer = svc->temporal_layer_id;
- for (i = current_temporal_layer + 1; i < svc->number_temporal_layers; ++i) {
- const int layer =
- LAYER_IDS_TO_IDX(svc->spatial_layer_id, i, svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- lrc->bits_off_target -= encoded_frame_size;
- // Clip buffer level to maximum buffer size for the layer.
- lrc->bits_off_target =
- VPXMIN(lrc->bits_off_target, lrc->maximum_buffer_size);
- lrc->buffer_level = lrc->bits_off_target;
- }
- }
- // Update the buffer level after encoding with encoded frame size.
- static void update_buffer_level_postencode(VP9_COMP *cpi,
- int encoded_frame_size) {
- RATE_CONTROL *const rc = &cpi->rc;
- rc->bits_off_target -= encoded_frame_size;
- // Clip the buffer level to the maximum specified buffer size.
- rc->bits_off_target = VPXMIN(rc->bits_off_target, rc->maximum_buffer_size);
- // For screen-content mode, and if frame-dropper is off, don't let buffer
- // level go below threshold, given here as -rc->maximum_ buffer_size.
- if (cpi->oxcf.content == VP9E_CONTENT_SCREEN &&
- cpi->oxcf.drop_frames_water_mark == 0)
- rc->bits_off_target = VPXMAX(rc->bits_off_target, -rc->maximum_buffer_size);
- rc->buffer_level = rc->bits_off_target;
- if (is_one_pass_cbr_svc(cpi)) {
- update_layer_buffer_level_postencode(&cpi->svc, encoded_frame_size);
- }
- }
- int vp9_rc_get_default_min_gf_interval(int width, int height,
- double framerate) {
- // Assume we do not need any constraint lower than 4K 20 fps
- static const double factor_safe = 3840 * 2160 * 20.0;
- const double factor = width * height * framerate;
- const int default_interval =
- clamp((int)(framerate * 0.125), MIN_GF_INTERVAL, MAX_GF_INTERVAL);
- if (factor <= factor_safe)
- return default_interval;
- else
- return VPXMAX(default_interval,
- (int)(MIN_GF_INTERVAL * factor / factor_safe + 0.5));
- // Note this logic makes:
- // 4K24: 5
- // 4K30: 6
- // 4K60: 12
- }
- int vp9_rc_get_default_max_gf_interval(double framerate, int min_gf_interval) {
- int interval = VPXMIN(MAX_GF_INTERVAL, (int)(framerate * 0.75));
- interval += (interval & 0x01); // Round to even value
- return VPXMAX(interval, min_gf_interval);
- }
- void vp9_rc_init(const VP9EncoderConfig *oxcf, int pass, RATE_CONTROL *rc) {
- int i;
- if (pass == 0 && oxcf->rc_mode == VPX_CBR) {
- rc->avg_frame_qindex[KEY_FRAME] = oxcf->worst_allowed_q;
- rc->avg_frame_qindex[INTER_FRAME] = oxcf->worst_allowed_q;
- } else {
- rc->avg_frame_qindex[KEY_FRAME] =
- (oxcf->worst_allowed_q + oxcf->best_allowed_q) / 2;
- rc->avg_frame_qindex[INTER_FRAME] =
- (oxcf->worst_allowed_q + oxcf->best_allowed_q) / 2;
- }
- rc->last_q[KEY_FRAME] = oxcf->best_allowed_q;
- rc->last_q[INTER_FRAME] = oxcf->worst_allowed_q;
- rc->buffer_level = rc->starting_buffer_level;
- rc->bits_off_target = rc->starting_buffer_level;
- rc->rolling_target_bits = rc->avg_frame_bandwidth;
- rc->rolling_actual_bits = rc->avg_frame_bandwidth;
- rc->long_rolling_target_bits = rc->avg_frame_bandwidth;
- rc->long_rolling_actual_bits = rc->avg_frame_bandwidth;
- rc->total_actual_bits = 0;
- rc->total_target_bits = 0;
- rc->total_target_vs_actual = 0;
- rc->avg_frame_low_motion = 0;
- rc->count_last_scene_change = 0;
- rc->af_ratio_onepass_vbr = 10;
- rc->prev_avg_source_sad_lag = 0;
- rc->high_source_sad = 0;
- rc->reset_high_source_sad = 0;
- rc->high_source_sad_lagindex = -1;
- rc->high_num_blocks_with_motion = 0;
- rc->hybrid_intra_scene_change = 0;
- rc->re_encode_maxq_scene_change = 0;
- rc->alt_ref_gf_group = 0;
- rc->last_frame_is_src_altref = 0;
- rc->fac_active_worst_inter = 150;
- rc->fac_active_worst_gf = 100;
- rc->force_qpmin = 0;
- for (i = 0; i < MAX_LAG_BUFFERS; ++i) rc->avg_source_sad[i] = 0;
- rc->frames_since_key = 8; // Sensible default for first frame.
- rc->this_key_frame_forced = 0;
- rc->next_key_frame_forced = 0;
- rc->source_alt_ref_pending = 0;
- rc->source_alt_ref_active = 0;
- rc->frames_till_gf_update_due = 0;
- rc->ni_av_qi = oxcf->worst_allowed_q;
- rc->ni_tot_qi = 0;
- rc->ni_frames = 0;
- rc->tot_q = 0.0;
- rc->avg_q = vp9_convert_qindex_to_q(oxcf->worst_allowed_q, oxcf->bit_depth);
- for (i = 0; i < RATE_FACTOR_LEVELS; ++i) {
- rc->rate_correction_factors[i] = 1.0;
- rc->damped_adjustment[i] = 0;
- }
- rc->min_gf_interval = oxcf->min_gf_interval;
- rc->max_gf_interval = oxcf->max_gf_interval;
- if (rc->min_gf_interval == 0)
- rc->min_gf_interval = vp9_rc_get_default_min_gf_interval(
- oxcf->width, oxcf->height, oxcf->init_framerate);
- if (rc->max_gf_interval == 0)
- rc->max_gf_interval = vp9_rc_get_default_max_gf_interval(
- oxcf->init_framerate, rc->min_gf_interval);
- rc->baseline_gf_interval = (rc->min_gf_interval + rc->max_gf_interval) / 2;
- rc->force_max_q = 0;
- rc->last_post_encode_dropped_scene_change = 0;
- rc->use_post_encode_drop = 0;
- rc->ext_use_post_encode_drop = 0;
- rc->arf_active_best_quality_adjustment_factor = 1.0;
- rc->preserve_arf_as_gld = 0;
- rc->preserve_next_arf_as_gld = 0;
- rc->show_arf_as_gld = 0;
- }
- static int check_buffer_above_thresh(VP9_COMP *cpi, int drop_mark) {
- SVC *svc = &cpi->svc;
- if (!cpi->use_svc || cpi->svc.framedrop_mode != FULL_SUPERFRAME_DROP) {
- RATE_CONTROL *const rc = &cpi->rc;
- return (rc->buffer_level > drop_mark);
- } else {
- int i;
- // For SVC in the FULL_SUPERFRAME_DROP): the condition on
- // buffer (if its above threshold, so no drop) is checked on current and
- // upper spatial layers. If any spatial layer is not above threshold then
- // we return 0.
- for (i = svc->spatial_layer_id; i < svc->number_spatial_layers; ++i) {
- const int layer = LAYER_IDS_TO_IDX(i, svc->temporal_layer_id,
- svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- // Exclude check for layer whose bitrate is 0.
- if (lc->target_bandwidth > 0) {
- const int drop_mark_layer = (int)(cpi->svc.framedrop_thresh[i] *
- lrc->optimal_buffer_level / 100);
- if (!(lrc->buffer_level > drop_mark_layer)) return 0;
- }
- }
- return 1;
- }
- }
- static int check_buffer_below_thresh(VP9_COMP *cpi, int drop_mark) {
- SVC *svc = &cpi->svc;
- if (!cpi->use_svc || cpi->svc.framedrop_mode == LAYER_DROP) {
- RATE_CONTROL *const rc = &cpi->rc;
- return (rc->buffer_level <= drop_mark);
- } else {
- int i;
- // For SVC in the constrained framedrop mode (svc->framedrop_mode =
- // CONSTRAINED_LAYER_DROP or FULL_SUPERFRAME_DROP): the condition on
- // buffer (if its below threshold, so drop frame) is checked on current
- // and upper spatial layers. For FULL_SUPERFRAME_DROP mode if any
- // spatial layer is <= threshold, then we return 1 (drop).
- for (i = svc->spatial_layer_id; i < svc->number_spatial_layers; ++i) {
- const int layer = LAYER_IDS_TO_IDX(i, svc->temporal_layer_id,
- svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- // Exclude check for layer whose bitrate is 0.
- if (lc->target_bandwidth > 0) {
- const int drop_mark_layer = (int)(cpi->svc.framedrop_thresh[i] *
- lrc->optimal_buffer_level / 100);
- if (cpi->svc.framedrop_mode == FULL_SUPERFRAME_DROP) {
- if (lrc->buffer_level <= drop_mark_layer) return 1;
- } else {
- if (!(lrc->buffer_level <= drop_mark_layer)) return 0;
- }
- }
- }
- if (cpi->svc.framedrop_mode == FULL_SUPERFRAME_DROP)
- return 0;
- else
- return 1;
- }
- }
- static int drop_frame(VP9_COMP *cpi) {
- const VP9EncoderConfig *oxcf = &cpi->oxcf;
- RATE_CONTROL *const rc = &cpi->rc;
- SVC *svc = &cpi->svc;
- int drop_frames_water_mark = oxcf->drop_frames_water_mark;
- if (cpi->use_svc) {
- // If we have dropped max_consec_drop frames, then we don't
- // drop this spatial layer, and reset counter to 0.
- if (svc->drop_count[svc->spatial_layer_id] == svc->max_consec_drop) {
- svc->drop_count[svc->spatial_layer_id] = 0;
- return 0;
- } else {
- drop_frames_water_mark = svc->framedrop_thresh[svc->spatial_layer_id];
- }
- }
- if (!drop_frames_water_mark ||
- (svc->spatial_layer_id > 0 &&
- svc->framedrop_mode == FULL_SUPERFRAME_DROP)) {
- return 0;
- } else {
- if ((rc->buffer_level < 0 && svc->framedrop_mode != FULL_SUPERFRAME_DROP) ||
- (check_buffer_below_thresh(cpi, -1) &&
- svc->framedrop_mode == FULL_SUPERFRAME_DROP)) {
- // Always drop if buffer is below 0.
- return 1;
- } else {
- // If buffer is below drop_mark, for now just drop every other frame
- // (starting with the next frame) until it increases back over drop_mark.
- int drop_mark =
- (int)(drop_frames_water_mark * rc->optimal_buffer_level / 100);
- if (check_buffer_above_thresh(cpi, drop_mark) &&
- (rc->decimation_factor > 0)) {
- --rc->decimation_factor;
- } else if (check_buffer_below_thresh(cpi, drop_mark) &&
- rc->decimation_factor == 0) {
- rc->decimation_factor = 1;
- }
- if (rc->decimation_factor > 0) {
- if (rc->decimation_count > 0) {
- --rc->decimation_count;
- return 1;
- } else {
- rc->decimation_count = rc->decimation_factor;
- return 0;
- }
- } else {
- rc->decimation_count = 0;
- return 0;
- }
- }
- }
- }
- int post_encode_drop_cbr(VP9_COMP *cpi, size_t *size) {
- size_t frame_size = *size << 3;
- int64_t new_buffer_level =
- cpi->rc.buffer_level + cpi->rc.avg_frame_bandwidth - (int64_t)frame_size;
- // For now we drop if new buffer level (given the encoded frame size) goes
- // below 0.
- if (new_buffer_level < 0) {
- *size = 0;
- vp9_rc_postencode_update_drop_frame(cpi);
- // Update flag to use for next frame.
- if (cpi->rc.high_source_sad ||
- (cpi->use_svc && cpi->svc.high_source_sad_superframe))
- cpi->rc.last_post_encode_dropped_scene_change = 1;
- // Force max_q on next fame.
- cpi->rc.force_max_q = 1;
- cpi->rc.avg_frame_qindex[INTER_FRAME] = cpi->rc.worst_quality;
- cpi->last_frame_dropped = 1;
- cpi->ext_refresh_frame_flags_pending = 0;
- if (cpi->use_svc) {
- SVC *svc = &cpi->svc;
- int sl = 0;
- int tl = 0;
- svc->last_layer_dropped[svc->spatial_layer_id] = 1;
- svc->drop_spatial_layer[svc->spatial_layer_id] = 1;
- svc->drop_count[svc->spatial_layer_id]++;
- svc->skip_enhancement_layer = 1;
- // Postencode drop is only checked on base spatial layer,
- // for now if max-q is set on base we force it on all layers.
- for (sl = 0; sl < svc->number_spatial_layers; ++sl) {
- for (tl = 0; tl < svc->number_temporal_layers; ++tl) {
- const int layer =
- LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- lrc->force_max_q = 1;
- lrc->avg_frame_qindex[INTER_FRAME] = cpi->rc.worst_quality;
- }
- }
- }
- return 1;
- }
- cpi->rc.force_max_q = 0;
- cpi->rc.last_post_encode_dropped_scene_change = 0;
- return 0;
- }
- int vp9_rc_drop_frame(VP9_COMP *cpi) {
- SVC *svc = &cpi->svc;
- int svc_prev_layer_dropped = 0;
- // In the constrained or full_superframe framedrop mode for svc
- // (framedrop_mode != LAYER_DROP), if the previous spatial layer was
- // dropped, drop the current spatial layer.
- if (cpi->use_svc && svc->spatial_layer_id > 0 &&
- svc->drop_spatial_layer[svc->spatial_layer_id - 1])
- svc_prev_layer_dropped = 1;
- if ((svc_prev_layer_dropped && svc->framedrop_mode != LAYER_DROP) ||
- drop_frame(cpi)) {
- vp9_rc_postencode_update_drop_frame(cpi);
- cpi->ext_refresh_frame_flags_pending = 0;
- cpi->last_frame_dropped = 1;
- if (cpi->use_svc) {
- svc->last_layer_dropped[svc->spatial_layer_id] = 1;
- svc->drop_spatial_layer[svc->spatial_layer_id] = 1;
- svc->drop_count[svc->spatial_layer_id]++;
- svc->skip_enhancement_layer = 1;
- if (svc->framedrop_mode == LAYER_DROP ||
- svc->drop_spatial_layer[0] == 0) {
- // For the case of constrained drop mode where the base is dropped
- // (drop_spatial_layer[0] == 1), which means full superframe dropped,
- // we don't increment the svc frame counters. In particular temporal
- // layer counter (which is incremented in vp9_inc_frame_in_layer())
- // won't be incremented, so on a dropped frame we try the same
- // temporal_layer_id on next incoming frame. This is to avoid an
- // issue with temporal alignement with full superframe dropping.
- vp9_inc_frame_in_layer(cpi);
- }
- if (svc->spatial_layer_id == svc->number_spatial_layers - 1) {
- int i;
- int all_layers_drop = 1;
- for (i = 0; i < svc->spatial_layer_id; i++) {
- if (svc->drop_spatial_layer[i] == 0) {
- all_layers_drop = 0;
- break;
- }
- }
- if (all_layers_drop == 1) svc->skip_enhancement_layer = 0;
- }
- }
- return 1;
- }
- return 0;
- }
- static int adjust_q_cbr(const VP9_COMP *cpi, int q) {
- // This makes sure q is between oscillating Qs to prevent resonance.
- if (!cpi->rc.reset_high_source_sad &&
- (!cpi->oxcf.gf_cbr_boost_pct ||
- !(cpi->refresh_alt_ref_frame || cpi->refresh_golden_frame)) &&
- (cpi->rc.rc_1_frame * cpi->rc.rc_2_frame == -1) &&
- cpi->rc.q_1_frame != cpi->rc.q_2_frame) {
- int qclamp = clamp(q, VPXMIN(cpi->rc.q_1_frame, cpi->rc.q_2_frame),
- VPXMAX(cpi->rc.q_1_frame, cpi->rc.q_2_frame));
- // If the previous frame had overshoot and the current q needs to increase
- // above the clamped value, reduce the clamp for faster reaction to
- // overshoot.
- if (cpi->rc.rc_1_frame == -1 && q > qclamp)
- q = (q + qclamp) >> 1;
- else
- q = qclamp;
- }
- if (cpi->oxcf.content == VP9E_CONTENT_SCREEN)
- vp9_cyclic_refresh_limit_q(cpi, &q);
- return VPXMAX(VPXMIN(q, cpi->rc.worst_quality), cpi->rc.best_quality);
- }
- static double get_rate_correction_factor(const VP9_COMP *cpi) {
- const RATE_CONTROL *const rc = &cpi->rc;
- const VP9_COMMON *const cm = &cpi->common;
- double rcf;
- if (frame_is_intra_only(cm)) {
- rcf = rc->rate_correction_factors[KF_STD];
- } else if (cpi->oxcf.pass == 2) {
- RATE_FACTOR_LEVEL rf_lvl =
- cpi->twopass.gf_group.rf_level[cpi->twopass.gf_group.index];
- rcf = rc->rate_correction_factors[rf_lvl];
- } else {
- if ((cpi->refresh_alt_ref_frame || cpi->refresh_golden_frame) &&
- !rc->is_src_frame_alt_ref && !cpi->use_svc &&
- (cpi->oxcf.rc_mode != VPX_CBR || cpi->oxcf.gf_cbr_boost_pct > 100))
- rcf = rc->rate_correction_factors[GF_ARF_STD];
- else
- rcf = rc->rate_correction_factors[INTER_NORMAL];
- }
- rcf *= rcf_mult[rc->frame_size_selector];
- return fclamp(rcf, MIN_BPB_FACTOR, MAX_BPB_FACTOR);
- }
- static void set_rate_correction_factor(VP9_COMP *cpi, double factor) {
- RATE_CONTROL *const rc = &cpi->rc;
- const VP9_COMMON *const cm = &cpi->common;
- // Normalize RCF to account for the size-dependent scaling factor.
- factor /= rcf_mult[cpi->rc.frame_size_selector];
- factor = fclamp(factor, MIN_BPB_FACTOR, MAX_BPB_FACTOR);
- if (frame_is_intra_only(cm)) {
- rc->rate_correction_factors[KF_STD] = factor;
- } else if (cpi->oxcf.pass == 2) {
- RATE_FACTOR_LEVEL rf_lvl =
- cpi->twopass.gf_group.rf_level[cpi->twopass.gf_group.index];
- rc->rate_correction_factors[rf_lvl] = factor;
- } else {
- if ((cpi->refresh_alt_ref_frame || cpi->refresh_golden_frame) &&
- !rc->is_src_frame_alt_ref && !cpi->use_svc &&
- (cpi->oxcf.rc_mode != VPX_CBR || cpi->oxcf.gf_cbr_boost_pct > 100))
- rc->rate_correction_factors[GF_ARF_STD] = factor;
- else
- rc->rate_correction_factors[INTER_NORMAL] = factor;
- }
- }
- void vp9_rc_update_rate_correction_factors(VP9_COMP *cpi) {
- const VP9_COMMON *const cm = &cpi->common;
- int correction_factor = 100;
- double rate_correction_factor = get_rate_correction_factor(cpi);
- double adjustment_limit;
- RATE_FACTOR_LEVEL rf_lvl =
- cpi->twopass.gf_group.rf_level[cpi->twopass.gf_group.index];
- int projected_size_based_on_q = 0;
- // Do not update the rate factors for arf overlay frames.
- if (cpi->rc.is_src_frame_alt_ref) return;
- // Clear down mmx registers to allow floating point in what follows
- vpx_clear_system_state();
- // Work out how big we would have expected the frame to be at this Q given
- // the current correction factor.
- // Stay in double to avoid int overflow when values are large
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cpi->common.seg.enabled) {
- projected_size_based_on_q =
- vp9_cyclic_refresh_estimate_bits_at_q(cpi, rate_correction_factor);
- } else {
- FRAME_TYPE frame_type = cm->intra_only ? KEY_FRAME : cm->frame_type;
- projected_size_based_on_q =
- vp9_estimate_bits_at_q(frame_type, cm->base_qindex, cm->MBs,
- rate_correction_factor, cm->bit_depth);
- }
- // Work out a size correction factor.
- if (projected_size_based_on_q > FRAME_OVERHEAD_BITS)
- correction_factor = (int)((100 * (int64_t)cpi->rc.projected_frame_size) /
- projected_size_based_on_q);
- // Do not use damped adjustment for the first frame of each frame type
- if (!cpi->rc.damped_adjustment[rf_lvl]) {
- adjustment_limit = 1.0;
- cpi->rc.damped_adjustment[rf_lvl] = 1;
- } else {
- // More heavily damped adjustment used if we have been oscillating either
- // side of target.
- adjustment_limit =
- 0.25 + 0.5 * VPXMIN(1, fabs(log10(0.01 * correction_factor)));
- }
- cpi->rc.q_2_frame = cpi->rc.q_1_frame;
- cpi->rc.q_1_frame = cm->base_qindex;
- cpi->rc.rc_2_frame = cpi->rc.rc_1_frame;
- if (correction_factor > 110)
- cpi->rc.rc_1_frame = -1;
- else if (correction_factor < 90)
- cpi->rc.rc_1_frame = 1;
- else
- cpi->rc.rc_1_frame = 0;
- // Turn off oscilation detection in the case of massive overshoot.
- if (cpi->rc.rc_1_frame == -1 && cpi->rc.rc_2_frame == 1 &&
- correction_factor > 1000) {
- cpi->rc.rc_2_frame = 0;
- }
- if (correction_factor > 102) {
- // We are not already at the worst allowable quality
- correction_factor =
- (int)(100 + ((correction_factor - 100) * adjustment_limit));
- rate_correction_factor = (rate_correction_factor * correction_factor) / 100;
- // Keep rate_correction_factor within limits
- if (rate_correction_factor > MAX_BPB_FACTOR)
- rate_correction_factor = MAX_BPB_FACTOR;
- } else if (correction_factor < 99) {
- // We are not already at the best allowable quality
- correction_factor =
- (int)(100 - ((100 - correction_factor) * adjustment_limit));
- rate_correction_factor = (rate_correction_factor * correction_factor) / 100;
- // Keep rate_correction_factor within limits
- if (rate_correction_factor < MIN_BPB_FACTOR)
- rate_correction_factor = MIN_BPB_FACTOR;
- }
- set_rate_correction_factor(cpi, rate_correction_factor);
- }
- int vp9_rc_regulate_q(const VP9_COMP *cpi, int target_bits_per_frame,
- int active_best_quality, int active_worst_quality) {
- const VP9_COMMON *const cm = &cpi->common;
- CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
- int q = active_worst_quality;
- int last_error = INT_MAX;
- int i, target_bits_per_mb, bits_per_mb_at_this_q;
- const double correction_factor = get_rate_correction_factor(cpi);
- // Calculate required scaling factor based on target frame size and size of
- // frame produced using previous Q.
- target_bits_per_mb =
- (int)(((uint64_t)target_bits_per_frame << BPER_MB_NORMBITS) / cm->MBs);
- i = active_best_quality;
- do {
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled &&
- cr->apply_cyclic_refresh &&
- (!cpi->oxcf.gf_cbr_boost_pct || !cpi->refresh_golden_frame)) {
- bits_per_mb_at_this_q =
- (int)vp9_cyclic_refresh_rc_bits_per_mb(cpi, i, correction_factor);
- } else {
- FRAME_TYPE frame_type = cm->intra_only ? KEY_FRAME : cm->frame_type;
- bits_per_mb_at_this_q = (int)vp9_rc_bits_per_mb(
- frame_type, i, correction_factor, cm->bit_depth);
- }
- if (bits_per_mb_at_this_q <= target_bits_per_mb) {
- if ((target_bits_per_mb - bits_per_mb_at_this_q) <= last_error)
- q = i;
- else
- q = i - 1;
- break;
- } else {
- last_error = bits_per_mb_at_this_q - target_bits_per_mb;
- }
- } while (++i <= active_worst_quality);
- // Adjustment to q for CBR mode.
- if (cpi->oxcf.rc_mode == VPX_CBR) return adjust_q_cbr(cpi, q);
- return q;
- }
- static int get_active_quality(int q, int gfu_boost, int low, int high,
- int *low_motion_minq, int *high_motion_minq) {
- if (gfu_boost > high) {
- return low_motion_minq[q];
- } else if (gfu_boost < low) {
- return high_motion_minq[q];
- } else {
- const int gap = high - low;
- const int offset = high - gfu_boost;
- const int qdiff = high_motion_minq[q] - low_motion_minq[q];
- const int adjustment = ((offset * qdiff) + (gap >> 1)) / gap;
- return low_motion_minq[q] + adjustment;
- }
- }
- static int get_kf_active_quality(const RATE_CONTROL *const rc, int q,
- vpx_bit_depth_t bit_depth) {
- int *kf_low_motion_minq;
- int *kf_high_motion_minq;
- ASSIGN_MINQ_TABLE(bit_depth, kf_low_motion_minq);
- ASSIGN_MINQ_TABLE(bit_depth, kf_high_motion_minq);
- return get_active_quality(q, rc->kf_boost, kf_low, kf_high,
- kf_low_motion_minq, kf_high_motion_minq);
- }
- static int get_gf_active_quality(const VP9_COMP *const cpi, int q,
- vpx_bit_depth_t bit_depth) {
- const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
- const RATE_CONTROL *const rc = &cpi->rc;
- int *arfgf_low_motion_minq;
- int *arfgf_high_motion_minq;
- const int gfu_boost = cpi->multi_layer_arf
- ? gf_group->gfu_boost[gf_group->index]
- : rc->gfu_boost;
- ASSIGN_MINQ_TABLE(bit_depth, arfgf_low_motion_minq);
- ASSIGN_MINQ_TABLE(bit_depth, arfgf_high_motion_minq);
- return get_active_quality(q, gfu_boost, gf_low, gf_high,
- arfgf_low_motion_minq, arfgf_high_motion_minq);
- }
- static int calc_active_worst_quality_one_pass_vbr(const VP9_COMP *cpi) {
- const RATE_CONTROL *const rc = &cpi->rc;
- const unsigned int curr_frame = cpi->common.current_video_frame;
- int active_worst_quality;
- if (cpi->common.frame_type == KEY_FRAME) {
- active_worst_quality =
- curr_frame == 0 ? rc->worst_quality : rc->last_q[KEY_FRAME] << 1;
- } else {
- if (!rc->is_src_frame_alt_ref &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
- active_worst_quality =
- curr_frame == 1
- ? rc->last_q[KEY_FRAME] * 5 >> 2
- : rc->last_q[INTER_FRAME] * rc->fac_active_worst_gf / 100;
- } else {
- active_worst_quality = curr_frame == 1
- ? rc->last_q[KEY_FRAME] << 1
- : rc->avg_frame_qindex[INTER_FRAME] *
- rc->fac_active_worst_inter / 100;
- }
- }
- return VPXMIN(active_worst_quality, rc->worst_quality);
- }
- // Adjust active_worst_quality level based on buffer level.
- static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
- // Adjust active_worst_quality: If buffer is above the optimal/target level,
- // bring active_worst_quality down depending on fullness of buffer.
- // If buffer is below the optimal level, let the active_worst_quality go from
- // ambient Q (at buffer = optimal level) to worst_quality level
- // (at buffer = critical level).
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *rc = &cpi->rc;
- // Buffer level below which we push active_worst to worst_quality.
- int64_t critical_level = rc->optimal_buffer_level >> 3;
- int64_t buff_lvl_step = 0;
- int adjustment = 0;
- int active_worst_quality;
- int ambient_qp;
- unsigned int num_frames_weight_key = 5 * cpi->svc.number_temporal_layers;
- if (frame_is_intra_only(cm) || rc->reset_high_source_sad || rc->force_max_q)
- return rc->worst_quality;
- // For ambient_qp we use minimum of avg_frame_qindex[KEY_FRAME/INTER_FRAME]
- // for the first few frames following key frame. These are both initialized
- // to worst_quality and updated with (3/4, 1/4) average in postencode_update.
- // So for first few frames following key, the qp of that key frame is weighted
- // into the active_worst_quality setting.
- ambient_qp = (cm->current_video_frame < num_frames_weight_key)
- ? VPXMIN(rc->avg_frame_qindex[INTER_FRAME],
- rc->avg_frame_qindex[KEY_FRAME])
- : rc->avg_frame_qindex[INTER_FRAME];
- active_worst_quality = VPXMIN(rc->worst_quality, (ambient_qp * 5) >> 2);
- // For SVC if the current base spatial layer was key frame, use the QP from
- // that base layer for ambient_qp.
- if (cpi->use_svc && cpi->svc.spatial_layer_id > 0) {
- int layer = LAYER_IDS_TO_IDX(0, cpi->svc.temporal_layer_id,
- cpi->svc.number_temporal_layers);
- const LAYER_CONTEXT *lc = &cpi->svc.layer_context[layer];
- if (lc->is_key_frame) {
- const RATE_CONTROL *lrc = &lc->rc;
- ambient_qp = VPXMIN(ambient_qp, lrc->last_q[KEY_FRAME]);
- active_worst_quality = VPXMIN(rc->worst_quality, (ambient_qp * 9) >> 3);
- }
- }
- if (rc->buffer_level > rc->optimal_buffer_level) {
- // Adjust down.
- // Maximum limit for down adjustment ~30%; make it lower for screen content.
- int max_adjustment_down = active_worst_quality / 3;
- if (cpi->oxcf.content == VP9E_CONTENT_SCREEN)
- max_adjustment_down = active_worst_quality >> 3;
- if (max_adjustment_down) {
- buff_lvl_step = ((rc->maximum_buffer_size - rc->optimal_buffer_level) /
- max_adjustment_down);
- if (buff_lvl_step)
- adjustment = (int)((rc->buffer_level - rc->optimal_buffer_level) /
- buff_lvl_step);
- active_worst_quality -= adjustment;
- }
- } else if (rc->buffer_level > critical_level) {
- // Adjust up from ambient Q.
- if (critical_level) {
- buff_lvl_step = (rc->optimal_buffer_level - critical_level);
- if (buff_lvl_step) {
- adjustment = (int)((rc->worst_quality - ambient_qp) *
- (rc->optimal_buffer_level - rc->buffer_level) /
- buff_lvl_step);
- }
- active_worst_quality = ambient_qp + adjustment;
- }
- } else {
- // Set to worst_quality if buffer is below critical level.
- active_worst_quality = rc->worst_quality;
- }
- return active_worst_quality;
- }
- static int rc_pick_q_and_bounds_one_pass_cbr(const VP9_COMP *cpi,
- int *bottom_index,
- int *top_index) {
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *const rc = &cpi->rc;
- int active_best_quality;
- int active_worst_quality = calc_active_worst_quality_one_pass_cbr(cpi);
- int q;
- int *rtc_minq;
- ASSIGN_MINQ_TABLE(cm->bit_depth, rtc_minq);
- if (frame_is_intra_only(cm)) {
- active_best_quality = rc->best_quality;
- // Handle the special case for key frames forced when we have reached
- // the maximum key frame interval. Here force the Q to a range
- // based on the ambient Q to reduce the risk of popping.
- if (rc->this_key_frame_forced) {
- int qindex = rc->last_boosted_qindex;
- double last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- int delta_qindex = vp9_compute_qdelta(
- rc, last_boosted_q, (last_boosted_q * 0.75), cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- } else if (cm->current_video_frame > 0) {
- // not first frame of one pass and kf_boost is set
- double q_adj_factor = 1.0;
- double q_val;
- active_best_quality = get_kf_active_quality(
- rc, rc->avg_frame_qindex[KEY_FRAME], cm->bit_depth);
- // Allow somewhat lower kf minq with small image formats.
- if ((cm->width * cm->height) <= (352 * 288)) {
- q_adj_factor -= 0.25;
- }
- // Convert the adjustment factor to a qindex delta
- // on active_best_quality.
- q_val = vp9_convert_qindex_to_q(active_best_quality, cm->bit_depth);
- active_best_quality +=
- vp9_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
- }
- } else if (!rc->is_src_frame_alt_ref && !cpi->use_svc &&
- cpi->oxcf.gf_cbr_boost_pct &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
- // Use the lower of active_worst_quality and recent
- // average Q as basis for GF/ARF best Q limit unless last frame was
- // a key frame.
- if (rc->frames_since_key > 1 &&
- rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality) {
- q = rc->avg_frame_qindex[INTER_FRAME];
- } else {
- q = active_worst_quality;
- }
- active_best_quality = get_gf_active_quality(cpi, q, cm->bit_depth);
- } else {
- // Use the lower of active_worst_quality and recent/average Q.
- if (cm->current_video_frame > 1) {
- if (rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality)
- active_best_quality = rtc_minq[rc->avg_frame_qindex[INTER_FRAME]];
- else
- active_best_quality = rtc_minq[active_worst_quality];
- } else {
- if (rc->avg_frame_qindex[KEY_FRAME] < active_worst_quality)
- active_best_quality = rtc_minq[rc->avg_frame_qindex[KEY_FRAME]];
- else
- active_best_quality = rtc_minq[active_worst_quality];
- }
- }
- // Clip the active best and worst quality values to limits
- active_best_quality =
- clamp(active_best_quality, rc->best_quality, rc->worst_quality);
- active_worst_quality =
- clamp(active_worst_quality, active_best_quality, rc->worst_quality);
- *top_index = active_worst_quality;
- *bottom_index = active_best_quality;
- // Special case code to try and match quality with forced key frames
- if (frame_is_intra_only(cm) && rc->this_key_frame_forced) {
- q = rc->last_boosted_qindex;
- } else {
- q = vp9_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality,
- active_worst_quality);
- if (q > *top_index) {
- // Special case when we are targeting the max allowed rate
- if (rc->this_frame_target >= rc->max_frame_bandwidth)
- *top_index = q;
- else
- q = *top_index;
- }
- }
- assert(*top_index <= rc->worst_quality && *top_index >= rc->best_quality);
- assert(*bottom_index <= rc->worst_quality &&
- *bottom_index >= rc->best_quality);
- assert(q <= rc->worst_quality && q >= rc->best_quality);
- return q;
- }
- static int get_active_cq_level_one_pass(const RATE_CONTROL *rc,
- const VP9EncoderConfig *const oxcf) {
- static const double cq_adjust_threshold = 0.1;
- int active_cq_level = oxcf->cq_level;
- if (oxcf->rc_mode == VPX_CQ && rc->total_target_bits > 0) {
- const double x = (double)rc->total_actual_bits / rc->total_target_bits;
- if (x < cq_adjust_threshold) {
- active_cq_level = (int)(active_cq_level * x / cq_adjust_threshold);
- }
- }
- return active_cq_level;
- }
- #define SMOOTH_PCT_MIN 0.1
- #define SMOOTH_PCT_DIV 0.05
- static int get_active_cq_level_two_pass(const TWO_PASS *twopass,
- const RATE_CONTROL *rc,
- const VP9EncoderConfig *const oxcf) {
- static const double cq_adjust_threshold = 0.1;
- int active_cq_level = oxcf->cq_level;
- if (oxcf->rc_mode == VPX_CQ) {
- if (twopass->mb_smooth_pct > SMOOTH_PCT_MIN) {
- active_cq_level -=
- (int)((twopass->mb_smooth_pct - SMOOTH_PCT_MIN) / SMOOTH_PCT_DIV);
- active_cq_level = VPXMAX(active_cq_level, 0);
- }
- if (rc->total_target_bits > 0) {
- const double x = (double)rc->total_actual_bits / rc->total_target_bits;
- if (x < cq_adjust_threshold) {
- active_cq_level = (int)(active_cq_level * x / cq_adjust_threshold);
- }
- }
- }
- return active_cq_level;
- }
- static int rc_pick_q_and_bounds_one_pass_vbr(const VP9_COMP *cpi,
- int *bottom_index,
- int *top_index) {
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *const rc = &cpi->rc;
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- const int cq_level = get_active_cq_level_one_pass(rc, oxcf);
- int active_best_quality;
- int active_worst_quality = calc_active_worst_quality_one_pass_vbr(cpi);
- int q;
- int *inter_minq;
- ASSIGN_MINQ_TABLE(cm->bit_depth, inter_minq);
- if (frame_is_intra_only(cm)) {
- if (oxcf->rc_mode == VPX_Q) {
- int qindex = cq_level;
- double q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- int delta_qindex = vp9_compute_qdelta(rc, q, q * 0.25, cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- } else if (rc->this_key_frame_forced) {
- // Handle the special case for key frames forced when we have reached
- // the maximum key frame interval. Here force the Q to a range
- // based on the ambient Q to reduce the risk of popping.
- int qindex = rc->last_boosted_qindex;
- double last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- int delta_qindex = vp9_compute_qdelta(
- rc, last_boosted_q, last_boosted_q * 0.75, cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- } else {
- // not first frame of one pass and kf_boost is set
- double q_adj_factor = 1.0;
- double q_val;
- active_best_quality = get_kf_active_quality(
- rc, rc->avg_frame_qindex[KEY_FRAME], cm->bit_depth);
- // Allow somewhat lower kf minq with small image formats.
- if ((cm->width * cm->height) <= (352 * 288)) {
- q_adj_factor -= 0.25;
- }
- // Convert the adjustment factor to a qindex delta
- // on active_best_quality.
- q_val = vp9_convert_qindex_to_q(active_best_quality, cm->bit_depth);
- active_best_quality +=
- vp9_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
- }
- } else if (!rc->is_src_frame_alt_ref &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
- // Use the lower of active_worst_quality and recent
- // average Q as basis for GF/ARF best Q limit unless last frame was
- // a key frame.
- if (rc->frames_since_key > 1) {
- if (rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality) {
- q = rc->avg_frame_qindex[INTER_FRAME];
- } else {
- q = active_worst_quality;
- }
- } else {
- q = rc->avg_frame_qindex[KEY_FRAME];
- }
- // For constrained quality dont allow Q less than the cq level
- if (oxcf->rc_mode == VPX_CQ) {
- if (q < cq_level) q = cq_level;
- active_best_quality = get_gf_active_quality(cpi, q, cm->bit_depth);
- // Constrained quality use slightly lower active best.
- active_best_quality = active_best_quality * 15 / 16;
- } else if (oxcf->rc_mode == VPX_Q) {
- int qindex = cq_level;
- double q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- int delta_qindex;
- if (cpi->refresh_alt_ref_frame)
- delta_qindex = vp9_compute_qdelta(rc, q, q * 0.40, cm->bit_depth);
- else
- delta_qindex = vp9_compute_qdelta(rc, q, q * 0.50, cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- } else {
- active_best_quality = get_gf_active_quality(cpi, q, cm->bit_depth);
- }
- } else {
- if (oxcf->rc_mode == VPX_Q) {
- int qindex = cq_level;
- double q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- double delta_rate[FIXED_GF_INTERVAL] = { 0.50, 1.0, 0.85, 1.0,
- 0.70, 1.0, 0.85, 1.0 };
- int delta_qindex = vp9_compute_qdelta(
- rc, q, q * delta_rate[cm->current_video_frame % FIXED_GF_INTERVAL],
- cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- } else {
- // Use the min of the average Q and active_worst_quality as basis for
- // active_best.
- if (cm->current_video_frame > 1) {
- q = VPXMIN(rc->avg_frame_qindex[INTER_FRAME], active_worst_quality);
- active_best_quality = inter_minq[q];
- } else {
- active_best_quality = inter_minq[rc->avg_frame_qindex[KEY_FRAME]];
- }
- // For the constrained quality mode we don't want
- // q to fall below the cq level.
- if ((oxcf->rc_mode == VPX_CQ) && (active_best_quality < cq_level)) {
- active_best_quality = cq_level;
- }
- }
- }
- // Clip the active best and worst quality values to limits
- active_best_quality =
- clamp(active_best_quality, rc->best_quality, rc->worst_quality);
- active_worst_quality =
- clamp(active_worst_quality, active_best_quality, rc->worst_quality);
- *top_index = active_worst_quality;
- *bottom_index = active_best_quality;
- #if LIMIT_QRANGE_FOR_ALTREF_AND_KEY
- {
- int qdelta = 0;
- vpx_clear_system_state();
- // Limit Q range for the adaptive loop.
- if (cm->frame_type == KEY_FRAME && !rc->this_key_frame_forced &&
- !(cm->current_video_frame == 0)) {
- qdelta = vp9_compute_qdelta_by_rate(
- &cpi->rc, cm->frame_type, active_worst_quality, 2.0, cm->bit_depth);
- } else if (!rc->is_src_frame_alt_ref &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
- qdelta = vp9_compute_qdelta_by_rate(
- &cpi->rc, cm->frame_type, active_worst_quality, 1.75, cm->bit_depth);
- }
- if (rc->high_source_sad && cpi->sf.use_altref_onepass) qdelta = 0;
- *top_index = active_worst_quality + qdelta;
- *top_index = (*top_index > *bottom_index) ? *top_index : *bottom_index;
- }
- #endif
- if (oxcf->rc_mode == VPX_Q) {
- q = active_best_quality;
- // Special case code to try and match quality with forced key frames
- } else if ((cm->frame_type == KEY_FRAME) && rc->this_key_frame_forced) {
- q = rc->last_boosted_qindex;
- } else {
- q = vp9_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality,
- active_worst_quality);
- if (q > *top_index) {
- // Special case when we are targeting the max allowed rate
- if (rc->this_frame_target >= rc->max_frame_bandwidth)
- *top_index = q;
- else
- q = *top_index;
- }
- }
- assert(*top_index <= rc->worst_quality && *top_index >= rc->best_quality);
- assert(*bottom_index <= rc->worst_quality &&
- *bottom_index >= rc->best_quality);
- assert(q <= rc->worst_quality && q >= rc->best_quality);
- return q;
- }
- int vp9_frame_type_qdelta(const VP9_COMP *cpi, int rf_level, int q) {
- static const double rate_factor_deltas[RATE_FACTOR_LEVELS] = {
- 1.00, // INTER_NORMAL
- 1.00, // INTER_HIGH
- 1.50, // GF_ARF_LOW
- 1.75, // GF_ARF_STD
- 2.00, // KF_STD
- };
- const VP9_COMMON *const cm = &cpi->common;
- int qdelta = vp9_compute_qdelta_by_rate(
- &cpi->rc, cm->frame_type, q, rate_factor_deltas[rf_level], cm->bit_depth);
- return qdelta;
- }
- #define STATIC_MOTION_THRESH 95
- static void pick_kf_q_bound_two_pass(const VP9_COMP *cpi, int *bottom_index,
- int *top_index) {
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *const rc = &cpi->rc;
- int active_best_quality;
- int active_worst_quality = cpi->twopass.active_worst_quality;
- if (rc->this_key_frame_forced) {
- // Handle the special case for key frames forced when we have reached
- // the maximum key frame interval. Here force the Q to a range
- // based on the ambient Q to reduce the risk of popping.
- double last_boosted_q;
- int delta_qindex;
- int qindex;
- if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) {
- qindex = VPXMIN(rc->last_kf_qindex, rc->last_boosted_qindex);
- active_best_quality = qindex;
- last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
- last_boosted_q * 1.25, cm->bit_depth);
- active_worst_quality =
- VPXMIN(qindex + delta_qindex, active_worst_quality);
- } else {
- qindex = rc->last_boosted_qindex;
- last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
- last_boosted_q * 0.75, cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- }
- } else {
- // Not forced keyframe.
- double q_adj_factor = 1.0;
- double q_val;
- // Baseline value derived from cpi->active_worst_quality and kf boost.
- active_best_quality =
- get_kf_active_quality(rc, active_worst_quality, cm->bit_depth);
- if (cpi->twopass.kf_zeromotion_pct >= STATIC_KF_GROUP_THRESH) {
- active_best_quality /= 4;
- }
- // Dont allow the active min to be lossless (q0) unlesss the max q
- // already indicates lossless.
- active_best_quality =
- VPXMIN(active_worst_quality, VPXMAX(1, active_best_quality));
- // Allow somewhat lower kf minq with small image formats.
- if ((cm->width * cm->height) <= (352 * 288)) {
- q_adj_factor -= 0.25;
- }
- // Make a further adjustment based on the kf zero motion measure.
- q_adj_factor += 0.05 - (0.001 * (double)cpi->twopass.kf_zeromotion_pct);
- // Convert the adjustment factor to a qindex delta
- // on active_best_quality.
- q_val = vp9_convert_qindex_to_q(active_best_quality, cm->bit_depth);
- active_best_quality +=
- vp9_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
- }
- *top_index = active_worst_quality;
- *bottom_index = active_best_quality;
- }
- static int rc_constant_q(const VP9_COMP *cpi, int *bottom_index, int *top_index,
- int gf_group_index) {
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *const rc = &cpi->rc;
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- const GF_GROUP *gf_group = &cpi->twopass.gf_group;
- const int is_intra_frame = frame_is_intra_only(cm);
- const int cq_level = get_active_cq_level_two_pass(&cpi->twopass, rc, oxcf);
- int q = cq_level;
- int active_best_quality = cq_level;
- int active_worst_quality = cq_level;
- // Key frame qp decision
- if (is_intra_frame && rc->frames_to_key > 1)
- pick_kf_q_bound_two_pass(cpi, &active_best_quality, &active_worst_quality);
- // ARF / GF qp decision
- if (!is_intra_frame && !rc->is_src_frame_alt_ref &&
- cpi->refresh_alt_ref_frame) {
- active_best_quality = get_gf_active_quality(cpi, q, cm->bit_depth);
- // Modify best quality for second level arfs. For mode VPX_Q this
- // becomes the baseline frame q.
- if (gf_group->rf_level[gf_group_index] == GF_ARF_LOW) {
- const int layer_depth = gf_group->layer_depth[gf_group_index];
- // linearly fit the frame q depending on the layer depth index from
- // the base layer ARF.
- active_best_quality = ((layer_depth - 1) * cq_level +
- active_best_quality + layer_depth / 2) /
- layer_depth;
- }
- }
- q = active_best_quality;
- *top_index = active_worst_quality;
- *bottom_index = active_best_quality;
- return q;
- }
- static int rc_pick_q_and_bounds_two_pass(const VP9_COMP *cpi, int *bottom_index,
- int *top_index, int gf_group_index) {
- const VP9_COMMON *const cm = &cpi->common;
- const RATE_CONTROL *const rc = &cpi->rc;
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- const GF_GROUP *gf_group = &cpi->twopass.gf_group;
- const int cq_level = get_active_cq_level_two_pass(&cpi->twopass, rc, oxcf);
- int active_best_quality;
- int active_worst_quality = cpi->twopass.active_worst_quality;
- int q;
- int *inter_minq;
- int arf_active_best_quality_adjustment, arf_active_best_quality_max;
- int *arfgf_high_motion_minq;
- const int boost_frame =
- !rc->is_src_frame_alt_ref &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame);
- ASSIGN_MINQ_TABLE(cm->bit_depth, inter_minq);
- if (oxcf->rc_mode == VPX_Q)
- return rc_constant_q(cpi, bottom_index, top_index, gf_group_index);
- if (frame_is_intra_only(cm)) {
- pick_kf_q_bound_two_pass(cpi, &active_best_quality, &active_worst_quality);
- } else if (boost_frame) {
- // Use the lower of active_worst_quality and recent
- // average Q as basis for GF/ARF best Q limit unless last frame was
- // a key frame.
- if (rc->frames_since_key > 1 &&
- rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality) {
- q = rc->avg_frame_qindex[INTER_FRAME];
- } else {
- q = active_worst_quality;
- }
- // For constrained quality dont allow Q less than the cq level
- if (oxcf->rc_mode == VPX_CQ) {
- if (q < cq_level) q = cq_level;
- }
- active_best_quality = get_gf_active_quality(cpi, q, cm->bit_depth);
- ASSIGN_MINQ_TABLE(cm->bit_depth, arfgf_high_motion_minq);
- arf_active_best_quality_max = arfgf_high_motion_minq[q];
- arf_active_best_quality_adjustment =
- arf_active_best_quality_max - active_best_quality;
- active_best_quality = arf_active_best_quality_max -
- (int)(arf_active_best_quality_adjustment *
- rc->arf_active_best_quality_adjustment_factor);
- // Modify best quality for second level arfs. For mode VPX_Q this
- // becomes the baseline frame q.
- if (gf_group->rf_level[gf_group_index] == GF_ARF_LOW) {
- const int layer_depth = gf_group->layer_depth[gf_group_index];
- // linearly fit the frame q depending on the layer depth index from
- // the base layer ARF.
- active_best_quality =
- ((layer_depth - 1) * q + active_best_quality + layer_depth / 2) /
- layer_depth;
- }
- } else {
- active_best_quality = inter_minq[active_worst_quality];
- // For the constrained quality mode we don't want
- // q to fall below the cq level.
- if ((oxcf->rc_mode == VPX_CQ) && (active_best_quality < cq_level)) {
- active_best_quality = cq_level;
- }
- }
- // Extension to max or min Q if undershoot or overshoot is outside
- // the permitted range.
- if (frame_is_intra_only(cm) || boost_frame) {
- active_best_quality -=
- (cpi->twopass.extend_minq + cpi->twopass.extend_minq_fast);
- active_worst_quality += (cpi->twopass.extend_maxq / 2);
- } else {
- active_best_quality -=
- (cpi->twopass.extend_minq + cpi->twopass.extend_minq_fast) / 2;
- active_worst_quality += cpi->twopass.extend_maxq;
- // For normal frames do not allow an active minq lower than the q used for
- // the last boosted frame.
- active_best_quality = VPXMAX(active_best_quality, rc->last_boosted_qindex);
- }
- #if LIMIT_QRANGE_FOR_ALTREF_AND_KEY
- vpx_clear_system_state();
- // Static forced key frames Q restrictions dealt with elsewhere.
- if (!frame_is_intra_only(cm) || !rc->this_key_frame_forced ||
- cpi->twopass.last_kfgroup_zeromotion_pct < STATIC_MOTION_THRESH) {
- int qdelta = vp9_frame_type_qdelta(cpi, gf_group->rf_level[gf_group_index],
- active_worst_quality);
- active_worst_quality =
- VPXMAX(active_worst_quality + qdelta, active_best_quality);
- }
- #endif
- // Modify active_best_quality for downscaled normal frames.
- if (rc->frame_size_selector != UNSCALED && !frame_is_kf_gf_arf(cpi)) {
- int qdelta = vp9_compute_qdelta_by_rate(
- rc, cm->frame_type, active_best_quality, 2.0, cm->bit_depth);
- active_best_quality =
- VPXMAX(active_best_quality + qdelta, rc->best_quality);
- }
- active_best_quality =
- clamp(active_best_quality, rc->best_quality, rc->worst_quality);
- active_worst_quality =
- clamp(active_worst_quality, active_best_quality, rc->worst_quality);
- if (frame_is_intra_only(cm) && rc->this_key_frame_forced) {
- // If static since last kf use better of last boosted and last kf q.
- if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) {
- q = VPXMIN(rc->last_kf_qindex, rc->last_boosted_qindex);
- } else {
- q = rc->last_boosted_qindex;
- }
- } else if (frame_is_intra_only(cm) && !rc->this_key_frame_forced) {
- q = active_best_quality;
- } else {
- q = vp9_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality,
- active_worst_quality);
- if (q > active_worst_quality) {
- // Special case when we are targeting the max allowed rate.
- if (rc->this_frame_target >= rc->max_frame_bandwidth)
- active_worst_quality = q;
- else
- q = active_worst_quality;
- }
- }
- clamp(q, active_best_quality, active_worst_quality);
- *top_index = active_worst_quality;
- *bottom_index = active_best_quality;
- assert(*top_index <= rc->worst_quality && *top_index >= rc->best_quality);
- assert(*bottom_index <= rc->worst_quality &&
- *bottom_index >= rc->best_quality);
- assert(q <= rc->worst_quality && q >= rc->best_quality);
- return q;
- }
- int vp9_rc_pick_q_and_bounds(const VP9_COMP *cpi, int *bottom_index,
- int *top_index) {
- int q;
- const int gf_group_index = cpi->twopass.gf_group.index;
- if (cpi->oxcf.pass == 0) {
- if (cpi->oxcf.rc_mode == VPX_CBR)
- q = rc_pick_q_and_bounds_one_pass_cbr(cpi, bottom_index, top_index);
- else
- q = rc_pick_q_and_bounds_one_pass_vbr(cpi, bottom_index, top_index);
- } else {
- q = rc_pick_q_and_bounds_two_pass(cpi, bottom_index, top_index,
- gf_group_index);
- }
- if (cpi->sf.use_nonrd_pick_mode) {
- if (cpi->sf.force_frame_boost == 1) q -= cpi->sf.max_delta_qindex;
- if (q < *bottom_index)
- *bottom_index = q;
- else if (q > *top_index)
- *top_index = q;
- }
- return q;
- }
- void vp9_configure_buffer_updates(VP9_COMP *cpi, int gf_group_index) {
- VP9_COMMON *cm = &cpi->common;
- TWO_PASS *const twopass = &cpi->twopass;
- cpi->rc.is_src_frame_alt_ref = 0;
- cm->show_existing_frame = 0;
- cpi->rc.show_arf_as_gld = 0;
- switch (twopass->gf_group.update_type[gf_group_index]) {
- case KF_UPDATE:
- cpi->refresh_last_frame = 1;
- cpi->refresh_golden_frame = 1;
- cpi->refresh_alt_ref_frame = 1;
- break;
- case LF_UPDATE:
- cpi->refresh_last_frame = 1;
- cpi->refresh_golden_frame = 0;
- cpi->refresh_alt_ref_frame = 0;
- break;
- case GF_UPDATE:
- cpi->refresh_last_frame = 1;
- cpi->refresh_golden_frame = 1;
- cpi->refresh_alt_ref_frame = 0;
- break;
- case OVERLAY_UPDATE:
- cpi->refresh_last_frame = 0;
- cpi->refresh_golden_frame = 1;
- cpi->refresh_alt_ref_frame = 0;
- cpi->rc.is_src_frame_alt_ref = 1;
- if (cpi->rc.preserve_arf_as_gld) {
- cpi->rc.show_arf_as_gld = 1;
- cpi->refresh_golden_frame = 0;
- cm->show_existing_frame = 1;
- cm->refresh_frame_context = 0;
- }
- break;
- case MID_OVERLAY_UPDATE:
- cpi->refresh_last_frame = 1;
- cpi->refresh_golden_frame = 0;
- cpi->refresh_alt_ref_frame = 0;
- cpi->rc.is_src_frame_alt_ref = 1;
- break;
- case USE_BUF_FRAME:
- cpi->refresh_last_frame = 0;
- cpi->refresh_golden_frame = 0;
- cpi->refresh_alt_ref_frame = 0;
- cpi->rc.is_src_frame_alt_ref = 1;
- cm->show_existing_frame = 1;
- cm->refresh_frame_context = 0;
- break;
- default:
- assert(twopass->gf_group.update_type[gf_group_index] == ARF_UPDATE);
- cpi->refresh_last_frame = 0;
- cpi->refresh_golden_frame = 0;
- cpi->refresh_alt_ref_frame = 1;
- break;
- }
- }
- void vp9_estimate_qp_gop(VP9_COMP *cpi) {
- int gop_length = cpi->twopass.gf_group.gf_group_size;
- int bottom_index, top_index;
- int idx;
- const int gf_index = cpi->twopass.gf_group.index;
- const int is_src_frame_alt_ref = cpi->rc.is_src_frame_alt_ref;
- const int refresh_frame_context = cpi->common.refresh_frame_context;
- for (idx = 1; idx <= gop_length; ++idx) {
- TplDepFrame *tpl_frame = &cpi->tpl_stats[idx];
- int target_rate = cpi->twopass.gf_group.bit_allocation[idx];
- cpi->twopass.gf_group.index = idx;
- vp9_rc_set_frame_target(cpi, target_rate);
- vp9_configure_buffer_updates(cpi, idx);
- tpl_frame->base_qindex =
- rc_pick_q_and_bounds_two_pass(cpi, &bottom_index, &top_index, idx);
- tpl_frame->base_qindex = VPXMAX(tpl_frame->base_qindex, 1);
- }
- // Reset the actual index and frame update
- cpi->twopass.gf_group.index = gf_index;
- cpi->rc.is_src_frame_alt_ref = is_src_frame_alt_ref;
- cpi->common.refresh_frame_context = refresh_frame_context;
- vp9_configure_buffer_updates(cpi, gf_index);
- }
- void vp9_rc_compute_frame_size_bounds(const VP9_COMP *cpi, int frame_target,
- int *frame_under_shoot_limit,
- int *frame_over_shoot_limit) {
- if (cpi->oxcf.rc_mode == VPX_Q) {
- *frame_under_shoot_limit = 0;
- *frame_over_shoot_limit = INT_MAX;
- } else {
- // For very small rate targets where the fractional adjustment
- // may be tiny make sure there is at least a minimum range.
- const int tol_low = (cpi->sf.recode_tolerance_low * frame_target) / 100;
- const int tol_high = (cpi->sf.recode_tolerance_high * frame_target) / 100;
- *frame_under_shoot_limit = VPXMAX(frame_target - tol_low - 100, 0);
- *frame_over_shoot_limit =
- VPXMIN(frame_target + tol_high + 100, cpi->rc.max_frame_bandwidth);
- }
- }
- void vp9_rc_set_frame_target(VP9_COMP *cpi, int target) {
- const VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- rc->this_frame_target = target;
- // Modify frame size target when down-scaling.
- if (cpi->oxcf.resize_mode == RESIZE_DYNAMIC &&
- rc->frame_size_selector != UNSCALED)
- rc->this_frame_target = (int)(rc->this_frame_target *
- rate_thresh_mult[rc->frame_size_selector]);
- // Target rate per SB64 (including partial SB64s.
- rc->sb64_target_rate = (int)(((int64_t)rc->this_frame_target * 64 * 64) /
- (cm->width * cm->height));
- }
- static void update_alt_ref_frame_stats(VP9_COMP *cpi) {
- // this frame refreshes means next frames don't unless specified by user
- RATE_CONTROL *const rc = &cpi->rc;
- rc->frames_since_golden = 0;
- // Mark the alt ref as done (setting to 0 means no further alt refs pending).
- rc->source_alt_ref_pending = 0;
- // Set the alternate reference frame active flag
- rc->source_alt_ref_active = 1;
- }
- static void update_golden_frame_stats(VP9_COMP *cpi) {
- RATE_CONTROL *const rc = &cpi->rc;
- // Update the Golden frame usage counts.
- if (cpi->refresh_golden_frame) {
- // this frame refreshes means next frames don't unless specified by user
- rc->frames_since_golden = 0;
- // If we are not using alt ref in the up and coming group clear the arf
- // active flag. In multi arf group case, if the index is not 0 then
- // we are overlaying a mid group arf so should not reset the flag.
- if (cpi->oxcf.pass == 2) {
- if (!rc->source_alt_ref_pending && (cpi->twopass.gf_group.index == 0))
- rc->source_alt_ref_active = 0;
- } else if (!rc->source_alt_ref_pending) {
- rc->source_alt_ref_active = 0;
- }
- // Decrement count down till next gf
- if (rc->frames_till_gf_update_due > 0) rc->frames_till_gf_update_due--;
- } else if (!cpi->refresh_alt_ref_frame) {
- // Decrement count down till next gf
- if (rc->frames_till_gf_update_due > 0) rc->frames_till_gf_update_due--;
- rc->frames_since_golden++;
- if (rc->show_arf_as_gld) {
- rc->frames_since_golden = 0;
- // If we are not using alt ref in the up and coming group clear the arf
- // active flag. In multi arf group case, if the index is not 0 then
- // we are overlaying a mid group arf so should not reset the flag.
- if (!rc->source_alt_ref_pending && (cpi->twopass.gf_group.index == 0))
- rc->source_alt_ref_active = 0;
- }
- }
- }
- static void update_altref_usage(VP9_COMP *const cpi) {
- VP9_COMMON *const cm = &cpi->common;
- int sum_ref_frame_usage = 0;
- int arf_frame_usage = 0;
- int mi_row, mi_col;
- if (cpi->rc.alt_ref_gf_group && !cpi->rc.is_src_frame_alt_ref &&
- !cpi->refresh_golden_frame && !cpi->refresh_alt_ref_frame)
- for (mi_row = 0; mi_row < cm->mi_rows; mi_row += 8) {
- for (mi_col = 0; mi_col < cm->mi_cols; mi_col += 8) {
- int sboffset = ((cm->mi_cols + 7) >> 3) * (mi_row >> 3) + (mi_col >> 3);
- sum_ref_frame_usage += cpi->count_arf_frame_usage[sboffset] +
- cpi->count_lastgolden_frame_usage[sboffset];
- arf_frame_usage += cpi->count_arf_frame_usage[sboffset];
- }
- }
- if (sum_ref_frame_usage > 0) {
- double altref_count = 100.0 * arf_frame_usage / sum_ref_frame_usage;
- cpi->rc.perc_arf_usage =
- 0.75 * cpi->rc.perc_arf_usage + 0.25 * altref_count;
- }
- }
- static void compute_frame_low_motion(VP9_COMP *const cpi) {
- VP9_COMMON *const cm = &cpi->common;
- int mi_row, mi_col;
- MODE_INFO **mi = cm->mi_grid_visible;
- RATE_CONTROL *const rc = &cpi->rc;
- const int rows = cm->mi_rows, cols = cm->mi_cols;
- int cnt_zeromv = 0;
- for (mi_row = 0; mi_row < rows; mi_row++) {
- for (mi_col = 0; mi_col < cols; mi_col++) {
- if (mi[0]->ref_frame[0] == LAST_FRAME &&
- abs(mi[0]->mv[0].as_mv.row) < 16 && abs(mi[0]->mv[0].as_mv.col) < 16)
- cnt_zeromv++;
- mi++;
- }
- mi += 8;
- }
- cnt_zeromv = 100 * cnt_zeromv / (rows * cols);
- rc->avg_frame_low_motion = (3 * rc->avg_frame_low_motion + cnt_zeromv) >> 2;
- }
- void vp9_rc_postencode_update(VP9_COMP *cpi, uint64_t bytes_used) {
- const VP9_COMMON *const cm = &cpi->common;
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- RATE_CONTROL *const rc = &cpi->rc;
- SVC *const svc = &cpi->svc;
- const int qindex = cm->base_qindex;
- // Update rate control heuristics
- rc->projected_frame_size = (int)(bytes_used << 3);
- // Post encode loop adjustment of Q prediction.
- vp9_rc_update_rate_correction_factors(cpi);
- // Keep a record of last Q and ambient average Q.
- if (frame_is_intra_only(cm)) {
- rc->last_q[KEY_FRAME] = qindex;
- rc->avg_frame_qindex[KEY_FRAME] =
- ROUND_POWER_OF_TWO(3 * rc->avg_frame_qindex[KEY_FRAME] + qindex, 2);
- if (cpi->use_svc) {
- int i = 0;
- SVC *svc = &cpi->svc;
- for (i = 0; i < svc->number_temporal_layers; ++i) {
- const int layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, i,
- svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- lrc->last_q[KEY_FRAME] = rc->last_q[KEY_FRAME];
- lrc->avg_frame_qindex[KEY_FRAME] = rc->avg_frame_qindex[KEY_FRAME];
- }
- }
- } else {
- if ((cpi->use_svc && oxcf->rc_mode == VPX_CBR) ||
- (!rc->is_src_frame_alt_ref &&
- !(cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame))) {
- rc->last_q[INTER_FRAME] = qindex;
- rc->avg_frame_qindex[INTER_FRAME] =
- ROUND_POWER_OF_TWO(3 * rc->avg_frame_qindex[INTER_FRAME] + qindex, 2);
- rc->ni_frames++;
- rc->tot_q += vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- rc->avg_q = rc->tot_q / rc->ni_frames;
- // Calculate the average Q for normal inter frames (not key or GFU
- // frames).
- rc->ni_tot_qi += qindex;
- rc->ni_av_qi = rc->ni_tot_qi / rc->ni_frames;
- }
- }
- if (cpi->use_svc) vp9_svc_adjust_avg_frame_qindex(cpi);
- // Keep record of last boosted (KF/KF/ARF) Q value.
- // If the current frame is coded at a lower Q then we also update it.
- // If all mbs in this group are skipped only update if the Q value is
- // better than that already stored.
- // This is used to help set quality in forced key frames to reduce popping
- if ((qindex < rc->last_boosted_qindex) || (cm->frame_type == KEY_FRAME) ||
- (!rc->constrained_gf_group &&
- (cpi->refresh_alt_ref_frame ||
- (cpi->refresh_golden_frame && !rc->is_src_frame_alt_ref)))) {
- rc->last_boosted_qindex = qindex;
- }
- if (frame_is_intra_only(cm)) rc->last_kf_qindex = qindex;
- update_buffer_level_postencode(cpi, rc->projected_frame_size);
- // Rolling monitors of whether we are over or underspending used to help
- // regulate min and Max Q in two pass.
- if (!frame_is_intra_only(cm)) {
- rc->rolling_target_bits = ROUND_POWER_OF_TWO(
- rc->rolling_target_bits * 3 + rc->this_frame_target, 2);
- rc->rolling_actual_bits = ROUND_POWER_OF_TWO(
- rc->rolling_actual_bits * 3 + rc->projected_frame_size, 2);
- rc->long_rolling_target_bits = ROUND_POWER_OF_TWO(
- rc->long_rolling_target_bits * 31 + rc->this_frame_target, 5);
- rc->long_rolling_actual_bits = ROUND_POWER_OF_TWO(
- rc->long_rolling_actual_bits * 31 + rc->projected_frame_size, 5);
- }
- // Actual bits spent
- rc->total_actual_bits += rc->projected_frame_size;
- rc->total_target_bits += cm->show_frame ? rc->avg_frame_bandwidth : 0;
- rc->total_target_vs_actual = rc->total_actual_bits - rc->total_target_bits;
- if (!cpi->use_svc) {
- if (is_altref_enabled(cpi) && cpi->refresh_alt_ref_frame &&
- (!frame_is_intra_only(cm)))
- // Update the alternate reference frame stats as appropriate.
- update_alt_ref_frame_stats(cpi);
- else
- // Update the Golden frame stats as appropriate.
- update_golden_frame_stats(cpi);
- }
- // If second (long term) temporal reference is used for SVC,
- // update the golden frame counter, only for base temporal layer.
- if (cpi->use_svc && svc->use_gf_temporal_ref_current_layer &&
- svc->temporal_layer_id == 0) {
- int i = 0;
- if (cpi->refresh_golden_frame)
- rc->frames_since_golden = 0;
- else
- rc->frames_since_golden++;
- // Decrement count down till next gf
- if (rc->frames_till_gf_update_due > 0) rc->frames_till_gf_update_due--;
- // Update the frames_since_golden for all upper temporal layers.
- for (i = 1; i < svc->number_temporal_layers; ++i) {
- const int layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, i,
- svc->number_temporal_layers);
- LAYER_CONTEXT *const lc = &svc->layer_context[layer];
- RATE_CONTROL *const lrc = &lc->rc;
- lrc->frames_since_golden = rc->frames_since_golden;
- }
- }
- if (frame_is_intra_only(cm)) rc->frames_since_key = 0;
- if (cm->show_frame) {
- rc->frames_since_key++;
- rc->frames_to_key--;
- }
- // Trigger the resizing of the next frame if it is scaled.
- if (oxcf->pass != 0) {
- cpi->resize_pending =
- rc->next_frame_size_selector != rc->frame_size_selector;
- rc->frame_size_selector = rc->next_frame_size_selector;
- }
- if (oxcf->pass == 0) {
- if (!frame_is_intra_only(cm) &&
- (!cpi->use_svc ||
- (cpi->use_svc &&
- !svc->layer_context[svc->temporal_layer_id].is_key_frame &&
- svc->spatial_layer_id == svc->number_spatial_layers - 1))) {
- compute_frame_low_motion(cpi);
- if (cpi->sf.use_altref_onepass) update_altref_usage(cpi);
- }
- // For SVC: set avg_frame_low_motion (only computed on top spatial layer)
- // to all lower spatial layers.
- if (cpi->use_svc &&
- svc->spatial_layer_id == svc->number_spatial_layers - 1) {
- int i;
- for (i = 0; i < svc->number_spatial_layers - 1; ++i) {
- const int layer = LAYER_IDS_TO_IDX(i, svc->temporal_layer_id,
- svc->number_temporal_layers);
- LAYER_CONTEXT *const lc = &svc->layer_context[layer];
- RATE_CONTROL *const lrc = &lc->rc;
- lrc->avg_frame_low_motion = rc->avg_frame_low_motion;
- }
- }
- cpi->rc.last_frame_is_src_altref = cpi->rc.is_src_frame_alt_ref;
- }
- if (!frame_is_intra_only(cm)) rc->reset_high_source_sad = 0;
- rc->last_avg_frame_bandwidth = rc->avg_frame_bandwidth;
- if (cpi->use_svc && svc->spatial_layer_id < svc->number_spatial_layers - 1)
- svc->lower_layer_qindex = cm->base_qindex;
- }
- void vp9_rc_postencode_update_drop_frame(VP9_COMP *cpi) {
- cpi->common.current_video_frame++;
- cpi->rc.frames_since_key++;
- cpi->rc.frames_to_key--;
- cpi->rc.rc_2_frame = 0;
- cpi->rc.rc_1_frame = 0;
- cpi->rc.last_avg_frame_bandwidth = cpi->rc.avg_frame_bandwidth;
- // For SVC on dropped frame when framedrop_mode != LAYER_DROP:
- // in this mode the whole superframe may be dropped if only a single layer
- // has buffer underflow (below threshold). Since this can then lead to
- // increasing buffer levels/overflow for certain layers even though whole
- // superframe is dropped, we cap buffer level if its already stable.
- if (cpi->use_svc && cpi->svc.framedrop_mode != LAYER_DROP &&
- cpi->rc.buffer_level > cpi->rc.optimal_buffer_level) {
- cpi->rc.buffer_level = cpi->rc.optimal_buffer_level;
- cpi->rc.bits_off_target = cpi->rc.optimal_buffer_level;
- }
- }
- static int calc_pframe_target_size_one_pass_vbr(const VP9_COMP *const cpi) {
- const RATE_CONTROL *const rc = &cpi->rc;
- const int af_ratio = rc->af_ratio_onepass_vbr;
- int target =
- (!rc->is_src_frame_alt_ref &&
- (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame))
- ? (rc->avg_frame_bandwidth * rc->baseline_gf_interval * af_ratio) /
- (rc->baseline_gf_interval + af_ratio - 1)
- : (rc->avg_frame_bandwidth * rc->baseline_gf_interval) /
- (rc->baseline_gf_interval + af_ratio - 1);
- return vp9_rc_clamp_pframe_target_size(cpi, target);
- }
- static int calc_iframe_target_size_one_pass_vbr(const VP9_COMP *const cpi) {
- static const int kf_ratio = 25;
- const RATE_CONTROL *rc = &cpi->rc;
- const int target = rc->avg_frame_bandwidth * kf_ratio;
- return vp9_rc_clamp_iframe_target_size(cpi, target);
- }
- static void adjust_gfint_frame_constraint(VP9_COMP *cpi, int frame_constraint) {
- RATE_CONTROL *const rc = &cpi->rc;
- rc->constrained_gf_group = 0;
- // Reset gf interval to make more equal spacing for frame_constraint.
- if ((frame_constraint <= 7 * rc->baseline_gf_interval >> 2) &&
- (frame_constraint > rc->baseline_gf_interval)) {
- rc->baseline_gf_interval = frame_constraint >> 1;
- if (rc->baseline_gf_interval < 5)
- rc->baseline_gf_interval = frame_constraint;
- rc->constrained_gf_group = 1;
- } else {
- // Reset to keep gf_interval <= frame_constraint.
- if (rc->baseline_gf_interval > frame_constraint) {
- rc->baseline_gf_interval = frame_constraint;
- rc->constrained_gf_group = 1;
- }
- }
- }
- void vp9_rc_get_one_pass_vbr_params(VP9_COMP *cpi) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- int target;
- if (!cpi->refresh_alt_ref_frame &&
- (cm->current_video_frame == 0 || (cpi->frame_flags & FRAMEFLAGS_KEY) ||
- rc->frames_to_key == 0)) {
- cm->frame_type = KEY_FRAME;
- rc->this_key_frame_forced =
- cm->current_video_frame != 0 && rc->frames_to_key == 0;
- rc->frames_to_key = cpi->oxcf.key_freq;
- rc->kf_boost = DEFAULT_KF_BOOST;
- rc->source_alt_ref_active = 0;
- } else {
- cm->frame_type = INTER_FRAME;
- }
- if (rc->frames_till_gf_update_due == 0) {
- double rate_err = 1.0;
- rc->gfu_boost = DEFAULT_GF_BOOST;
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cpi->oxcf.pass == 0) {
- vp9_cyclic_refresh_set_golden_update(cpi);
- } else {
- rc->baseline_gf_interval = VPXMIN(
- 20, VPXMAX(10, (rc->min_gf_interval + rc->max_gf_interval) / 2));
- }
- rc->af_ratio_onepass_vbr = 10;
- if (rc->rolling_target_bits > 0)
- rate_err =
- (double)rc->rolling_actual_bits / (double)rc->rolling_target_bits;
- if (cm->current_video_frame > 30) {
- if (rc->avg_frame_qindex[INTER_FRAME] > (7 * rc->worst_quality) >> 3 &&
- rate_err > 3.5) {
- rc->baseline_gf_interval =
- VPXMIN(15, (3 * rc->baseline_gf_interval) >> 1);
- } else if (rc->avg_frame_low_motion < 20) {
- // Decrease gf interval for high motion case.
- rc->baseline_gf_interval = VPXMAX(6, rc->baseline_gf_interval >> 1);
- }
- // Adjust boost and af_ratio based on avg_frame_low_motion, which varies
- // between 0 and 100 (stationary, 100% zero/small motion).
- rc->gfu_boost =
- VPXMAX(500, DEFAULT_GF_BOOST * (rc->avg_frame_low_motion << 1) /
- (rc->avg_frame_low_motion + 100));
- rc->af_ratio_onepass_vbr = VPXMIN(15, VPXMAX(5, 3 * rc->gfu_boost / 400));
- }
- adjust_gfint_frame_constraint(cpi, rc->frames_to_key);
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- cpi->refresh_golden_frame = 1;
- rc->source_alt_ref_pending = 0;
- rc->alt_ref_gf_group = 0;
- if (cpi->sf.use_altref_onepass && cpi->oxcf.enable_auto_arf) {
- rc->source_alt_ref_pending = 1;
- rc->alt_ref_gf_group = 1;
- }
- }
- if (cm->frame_type == KEY_FRAME)
- target = calc_iframe_target_size_one_pass_vbr(cpi);
- else
- target = calc_pframe_target_size_one_pass_vbr(cpi);
- vp9_rc_set_frame_target(cpi, target);
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cpi->oxcf.pass == 0)
- vp9_cyclic_refresh_update_parameters(cpi);
- }
- static int calc_pframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
- const VP9EncoderConfig *oxcf = &cpi->oxcf;
- const RATE_CONTROL *rc = &cpi->rc;
- const SVC *const svc = &cpi->svc;
- const int64_t diff = rc->optimal_buffer_level - rc->buffer_level;
- const int64_t one_pct_bits = 1 + rc->optimal_buffer_level / 100;
- int min_frame_target =
- VPXMAX(rc->avg_frame_bandwidth >> 4, FRAME_OVERHEAD_BITS);
- int target;
- if (oxcf->gf_cbr_boost_pct) {
- const int af_ratio_pct = oxcf->gf_cbr_boost_pct + 100;
- target = cpi->refresh_golden_frame
- ? (rc->avg_frame_bandwidth * rc->baseline_gf_interval *
- af_ratio_pct) /
- (rc->baseline_gf_interval * 100 + af_ratio_pct - 100)
- : (rc->avg_frame_bandwidth * rc->baseline_gf_interval * 100) /
- (rc->baseline_gf_interval * 100 + af_ratio_pct - 100);
- } else {
- target = rc->avg_frame_bandwidth;
- }
- if (is_one_pass_cbr_svc(cpi)) {
- // Note that for layers, avg_frame_bandwidth is the cumulative
- // per-frame-bandwidth. For the target size of this frame, use the
- // layer average frame size (i.e., non-cumulative per-frame-bw).
- int layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, svc->temporal_layer_id,
- svc->number_temporal_layers);
- const LAYER_CONTEXT *lc = &svc->layer_context[layer];
- target = lc->avg_frame_size;
- min_frame_target = VPXMAX(lc->avg_frame_size >> 4, FRAME_OVERHEAD_BITS);
- }
- if (diff > 0) {
- // Lower the target bandwidth for this frame.
- const int pct_low = (int)VPXMIN(diff / one_pct_bits, oxcf->under_shoot_pct);
- target -= (target * pct_low) / 200;
- } else if (diff < 0) {
- // Increase the target bandwidth for this frame.
- const int pct_high =
- (int)VPXMIN(-diff / one_pct_bits, oxcf->over_shoot_pct);
- target += (target * pct_high) / 200;
- }
- if (oxcf->rc_max_inter_bitrate_pct) {
- const int max_rate =
- rc->avg_frame_bandwidth * oxcf->rc_max_inter_bitrate_pct / 100;
- target = VPXMIN(target, max_rate);
- }
- return VPXMAX(min_frame_target, target);
- }
- static int calc_iframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
- const RATE_CONTROL *rc = &cpi->rc;
- const VP9EncoderConfig *oxcf = &cpi->oxcf;
- const SVC *const svc = &cpi->svc;
- int target;
- if (cpi->common.current_video_frame == 0) {
- target = ((rc->starting_buffer_level / 2) > INT_MAX)
- ? INT_MAX
- : (int)(rc->starting_buffer_level / 2);
- } else {
- int kf_boost = 32;
- double framerate = cpi->framerate;
- if (svc->number_temporal_layers > 1 && oxcf->rc_mode == VPX_CBR) {
- // Use the layer framerate for temporal layers CBR mode.
- const int layer =
- LAYER_IDS_TO_IDX(svc->spatial_layer_id, svc->temporal_layer_id,
- svc->number_temporal_layers);
- const LAYER_CONTEXT *lc = &svc->layer_context[layer];
- framerate = lc->framerate;
- }
- kf_boost = VPXMAX(kf_boost, (int)(2 * framerate - 16));
- if (rc->frames_since_key < framerate / 2) {
- kf_boost = (int)(kf_boost * rc->frames_since_key / (framerate / 2));
- }
- target = ((16 + kf_boost) * rc->avg_frame_bandwidth) >> 4;
- }
- return vp9_rc_clamp_iframe_target_size(cpi, target);
- }
- static void set_intra_only_frame(VP9_COMP *cpi) {
- VP9_COMMON *const cm = &cpi->common;
- SVC *const svc = &cpi->svc;
- // Don't allow intra_only frame for bypass/flexible SVC mode, or if number
- // of spatial layers is 1 or if number of spatial or temporal layers > 3.
- // Also if intra-only is inserted on very first frame, don't allow if
- // if number of temporal layers > 1. This is because on intra-only frame
- // only 3 reference buffers can be updated, but for temporal layers > 1
- // we generally need to use buffer slots 4 and 5.
- if ((cm->current_video_frame == 0 && svc->number_temporal_layers > 1) ||
- svc->temporal_layering_mode == VP9E_TEMPORAL_LAYERING_MODE_BYPASS ||
- svc->number_spatial_layers > 3 || svc->number_temporal_layers > 3 ||
- svc->number_spatial_layers == 1)
- return;
- cm->show_frame = 0;
- cm->intra_only = 1;
- cm->frame_type = INTER_FRAME;
- cpi->ext_refresh_frame_flags_pending = 1;
- cpi->ext_refresh_last_frame = 1;
- cpi->ext_refresh_golden_frame = 1;
- cpi->ext_refresh_alt_ref_frame = 1;
- if (cm->current_video_frame == 0) {
- cpi->lst_fb_idx = 0;
- cpi->gld_fb_idx = 1;
- cpi->alt_fb_idx = 2;
- } else {
- int i;
- int count = 0;
- cpi->lst_fb_idx = -1;
- cpi->gld_fb_idx = -1;
- cpi->alt_fb_idx = -1;
- // For intra-only frame we need to refresh all slots that were
- // being used for the base layer (fb_idx_base[i] == 1).
- // Start with assigning last first, then golden and then alt.
- for (i = 0; i < REF_FRAMES; ++i) {
- if (svc->fb_idx_base[i] == 1) count++;
- if (count == 1 && cpi->lst_fb_idx == -1) cpi->lst_fb_idx = i;
- if (count == 2 && cpi->gld_fb_idx == -1) cpi->gld_fb_idx = i;
- if (count == 3 && cpi->alt_fb_idx == -1) cpi->alt_fb_idx = i;
- }
- // If golden or alt is not being used for base layer, then set them
- // to the lst_fb_idx.
- if (cpi->gld_fb_idx == -1) cpi->gld_fb_idx = cpi->lst_fb_idx;
- if (cpi->alt_fb_idx == -1) cpi->alt_fb_idx = cpi->lst_fb_idx;
- }
- }
- void vp9_rc_get_svc_params(VP9_COMP *cpi) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- SVC *const svc = &cpi->svc;
- int target = rc->avg_frame_bandwidth;
- int layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, svc->temporal_layer_id,
- svc->number_temporal_layers);
- if (svc->first_spatial_layer_to_encode)
- svc->layer_context[svc->temporal_layer_id].is_key_frame = 0;
- // Periodic key frames is based on the super-frame counter
- // (svc.current_superframe), also only base spatial layer is key frame.
- // Key frame is set for any of the following: very first frame, frame flags
- // indicates key, superframe counter hits key frequencey, or (non-intra) sync
- // flag is set for spatial layer 0.
- if ((cm->current_video_frame == 0 && !svc->previous_frame_is_intra_only) ||
- (cpi->frame_flags & FRAMEFLAGS_KEY) ||
- (cpi->oxcf.auto_key &&
- (svc->current_superframe % cpi->oxcf.key_freq == 0) &&
- !svc->previous_frame_is_intra_only && svc->spatial_layer_id == 0) ||
- (svc->spatial_layer_sync[0] == 1 && svc->spatial_layer_id == 0)) {
- cm->frame_type = KEY_FRAME;
- rc->source_alt_ref_active = 0;
- if (is_one_pass_cbr_svc(cpi)) {
- if (cm->current_video_frame > 0) vp9_svc_reset_temporal_layers(cpi, 1);
- layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, svc->temporal_layer_id,
- svc->number_temporal_layers);
- svc->layer_context[layer].is_key_frame = 1;
- cpi->ref_frame_flags &= (~VP9_LAST_FLAG & ~VP9_GOLD_FLAG & ~VP9_ALT_FLAG);
- // Assumption here is that LAST_FRAME is being updated for a keyframe.
- // Thus no change in update flags.
- target = calc_iframe_target_size_one_pass_cbr(cpi);
- }
- } else {
- cm->frame_type = INTER_FRAME;
- if (is_one_pass_cbr_svc(cpi)) {
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- // Add condition current_video_frame > 0 for the case where first frame
- // is intra only followed by overlay/copy frame. In this case we don't
- // want to reset is_key_frame to 0 on overlay/copy frame.
- lc->is_key_frame =
- (svc->spatial_layer_id == 0 && cm->current_video_frame > 0)
- ? 0
- : svc->layer_context[svc->temporal_layer_id].is_key_frame;
- target = calc_pframe_target_size_one_pass_cbr(cpi);
- }
- }
- if (svc->simulcast_mode) {
- if (svc->spatial_layer_id > 0 &&
- svc->layer_context[layer].is_key_frame == 1) {
- cm->frame_type = KEY_FRAME;
- cpi->ref_frame_flags &= (~VP9_LAST_FLAG & ~VP9_GOLD_FLAG & ~VP9_ALT_FLAG);
- target = calc_iframe_target_size_one_pass_cbr(cpi);
- }
- // Set the buffer idx and refresh flags for key frames in simulcast mode.
- // Note the buffer slot for long-term reference is set below (line 2255),
- // and alt_ref is used for that on key frame. So use last and golden for
- // the other two normal slots.
- if (cm->frame_type == KEY_FRAME) {
- if (svc->number_spatial_layers == 2) {
- if (svc->spatial_layer_id == 0) {
- cpi->lst_fb_idx = 0;
- cpi->gld_fb_idx = 2;
- cpi->alt_fb_idx = 6;
- } else if (svc->spatial_layer_id == 1) {
- cpi->lst_fb_idx = 1;
- cpi->gld_fb_idx = 3;
- cpi->alt_fb_idx = 6;
- }
- } else if (svc->number_spatial_layers == 3) {
- if (svc->spatial_layer_id == 0) {
- cpi->lst_fb_idx = 0;
- cpi->gld_fb_idx = 3;
- cpi->alt_fb_idx = 6;
- } else if (svc->spatial_layer_id == 1) {
- cpi->lst_fb_idx = 1;
- cpi->gld_fb_idx = 4;
- cpi->alt_fb_idx = 6;
- } else if (svc->spatial_layer_id == 2) {
- cpi->lst_fb_idx = 2;
- cpi->gld_fb_idx = 5;
- cpi->alt_fb_idx = 7;
- }
- }
- cpi->ext_refresh_last_frame = 1;
- cpi->ext_refresh_golden_frame = 1;
- cpi->ext_refresh_alt_ref_frame = 1;
- }
- }
- // Check if superframe contains a sync layer request.
- vp9_svc_check_spatial_layer_sync(cpi);
- // If long term termporal feature is enabled, set the period of the update.
- // The update/refresh of this reference frame is always on base temporal
- // layer frame.
- if (svc->use_gf_temporal_ref_current_layer) {
- // Only use gf long-term prediction on non-key superframes.
- if (!svc->layer_context[svc->temporal_layer_id].is_key_frame) {
- // Use golden for this reference, which will be used for prediction.
- int index = svc->spatial_layer_id;
- if (svc->number_spatial_layers == 3) index = svc->spatial_layer_id - 1;
- assert(index >= 0);
- cpi->gld_fb_idx = svc->buffer_gf_temporal_ref[index].idx;
- // Enable prediction off LAST (last reference) and golden (which will
- // generally be further behind/long-term reference).
- cpi->ref_frame_flags = VP9_LAST_FLAG | VP9_GOLD_FLAG;
- }
- // Check for update/refresh of reference: only refresh on base temporal
- // layer.
- if (svc->temporal_layer_id == 0) {
- if (svc->layer_context[svc->temporal_layer_id].is_key_frame) {
- // On key frame we update the buffer index used for long term reference.
- // Use the alt_ref since it is not used or updated on key frames.
- int index = svc->spatial_layer_id;
- if (svc->number_spatial_layers == 3) index = svc->spatial_layer_id - 1;
- assert(index >= 0);
- cpi->alt_fb_idx = svc->buffer_gf_temporal_ref[index].idx;
- cpi->ext_refresh_alt_ref_frame = 1;
- } else if (rc->frames_till_gf_update_due == 0) {
- // Set perdiod of next update. Make it a multiple of 10, as the cyclic
- // refresh is typically ~10%, and we'd like the update to happen after
- // a few cylces of the refresh (so it better quality frame). Note the
- // cyclic refresh for SVC only operates on base temporal layer frames.
- // Choose 20 as perdiod for now (2 cycles).
- rc->baseline_gf_interval = 20;
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- cpi->ext_refresh_golden_frame = 1;
- rc->gfu_boost = DEFAULT_GF_BOOST;
- }
- }
- } else if (!svc->use_gf_temporal_ref) {
- rc->frames_till_gf_update_due = INT_MAX;
- rc->baseline_gf_interval = INT_MAX;
- }
- if (svc->set_intra_only_frame) {
- set_intra_only_frame(cpi);
- target = calc_iframe_target_size_one_pass_cbr(cpi);
- }
- // Any update/change of global cyclic refresh parameters (amount/delta-qp)
- // should be done here, before the frame qp is selected.
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
- vp9_cyclic_refresh_update_parameters(cpi);
- vp9_rc_set_frame_target(cpi, target);
- if (cm->show_frame) update_buffer_level_svc_preencode(cpi);
- }
- void vp9_rc_get_one_pass_cbr_params(VP9_COMP *cpi) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- int target;
- if ((cm->current_video_frame == 0) || (cpi->frame_flags & FRAMEFLAGS_KEY) ||
- (cpi->oxcf.auto_key && rc->frames_to_key == 0)) {
- cm->frame_type = KEY_FRAME;
- rc->frames_to_key = cpi->oxcf.key_freq;
- rc->kf_boost = DEFAULT_KF_BOOST;
- rc->source_alt_ref_active = 0;
- } else {
- cm->frame_type = INTER_FRAME;
- }
- if (rc->frames_till_gf_update_due == 0) {
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
- vp9_cyclic_refresh_set_golden_update(cpi);
- else
- rc->baseline_gf_interval =
- (rc->min_gf_interval + rc->max_gf_interval) / 2;
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- // NOTE: frames_till_gf_update_due must be <= frames_to_key.
- 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;
- rc->gfu_boost = DEFAULT_GF_BOOST;
- }
- // Any update/change of global cyclic refresh parameters (amount/delta-qp)
- // should be done here, before the frame qp is selected.
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
- vp9_cyclic_refresh_update_parameters(cpi);
- if (frame_is_intra_only(cm))
- target = calc_iframe_target_size_one_pass_cbr(cpi);
- else
- target = calc_pframe_target_size_one_pass_cbr(cpi);
- vp9_rc_set_frame_target(cpi, target);
- if (cm->show_frame) update_buffer_level_preencode(cpi);
- if (cpi->oxcf.resize_mode == RESIZE_DYNAMIC)
- cpi->resize_pending = vp9_resize_one_pass_cbr(cpi);
- else
- cpi->resize_pending = 0;
- }
- int vp9_compute_qdelta(const RATE_CONTROL *rc, double qstart, double qtarget,
- vpx_bit_depth_t bit_depth) {
- int start_index = rc->worst_quality;
- int target_index = rc->worst_quality;
- int i;
- // Convert the average q value to an index.
- for (i = rc->best_quality; i < rc->worst_quality; ++i) {
- start_index = i;
- if (vp9_convert_qindex_to_q(i, bit_depth) >= qstart) break;
- }
- // Convert the q target to an index
- for (i = rc->best_quality; i < rc->worst_quality; ++i) {
- target_index = i;
- if (vp9_convert_qindex_to_q(i, bit_depth) >= qtarget) break;
- }
- return target_index - start_index;
- }
- int vp9_compute_qdelta_by_rate(const RATE_CONTROL *rc, FRAME_TYPE frame_type,
- int qindex, double rate_target_ratio,
- vpx_bit_depth_t bit_depth) {
- int target_index = rc->worst_quality;
- int i;
- // Look up the current projected bits per block for the base index
- const int base_bits_per_mb =
- vp9_rc_bits_per_mb(frame_type, qindex, 1.0, bit_depth);
- // Find the target bits per mb based on the base value and given ratio.
- const int target_bits_per_mb = (int)(rate_target_ratio * base_bits_per_mb);
- // Convert the q target to an index
- for (i = rc->best_quality; i < rc->worst_quality; ++i) {
- if (vp9_rc_bits_per_mb(frame_type, i, 1.0, bit_depth) <=
- target_bits_per_mb) {
- target_index = i;
- break;
- }
- }
- return target_index - qindex;
- }
- void vp9_rc_set_gf_interval_range(const VP9_COMP *const cpi,
- RATE_CONTROL *const rc) {
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- // Special case code for 1 pass fixed Q mode tests
- if ((oxcf->pass == 0) && (oxcf->rc_mode == VPX_Q)) {
- rc->max_gf_interval = FIXED_GF_INTERVAL;
- rc->min_gf_interval = FIXED_GF_INTERVAL;
- rc->static_scene_max_gf_interval = FIXED_GF_INTERVAL;
- } else {
- // Set Maximum gf/arf interval
- rc->max_gf_interval = oxcf->max_gf_interval;
- rc->min_gf_interval = oxcf->min_gf_interval;
- if (rc->min_gf_interval == 0)
- rc->min_gf_interval = vp9_rc_get_default_min_gf_interval(
- oxcf->width, oxcf->height, cpi->framerate);
- if (rc->max_gf_interval == 0)
- rc->max_gf_interval = vp9_rc_get_default_max_gf_interval(
- cpi->framerate, rc->min_gf_interval);
- // Extended max interval for genuinely static scenes like slide shows.
- rc->static_scene_max_gf_interval = MAX_STATIC_GF_GROUP_LENGTH;
- if (rc->max_gf_interval > rc->static_scene_max_gf_interval)
- rc->max_gf_interval = rc->static_scene_max_gf_interval;
- // Clamp min to max
- rc->min_gf_interval = VPXMIN(rc->min_gf_interval, rc->max_gf_interval);
- if (oxcf->target_level == LEVEL_AUTO) {
- const uint32_t pic_size = cpi->common.width * cpi->common.height;
- const uint32_t pic_breadth =
- VPXMAX(cpi->common.width, cpi->common.height);
- int i;
- for (i = LEVEL_1; i < LEVEL_MAX; ++i) {
- if (vp9_level_defs[i].max_luma_picture_size >= pic_size &&
- vp9_level_defs[i].max_luma_picture_breadth >= pic_breadth) {
- if (rc->min_gf_interval <=
- (int)vp9_level_defs[i].min_altref_distance) {
- rc->min_gf_interval =
- (int)vp9_level_defs[i].min_altref_distance + 1;
- rc->max_gf_interval =
- VPXMAX(rc->max_gf_interval, rc->min_gf_interval);
- }
- break;
- }
- }
- }
- }
- }
- void vp9_rc_update_framerate(VP9_COMP *cpi) {
- const VP9_COMMON *const cm = &cpi->common;
- const VP9EncoderConfig *const oxcf = &cpi->oxcf;
- RATE_CONTROL *const rc = &cpi->rc;
- int vbr_max_bits;
- rc->avg_frame_bandwidth = (int)(oxcf->target_bandwidth / cpi->framerate);
- rc->min_frame_bandwidth =
- (int)(rc->avg_frame_bandwidth * oxcf->two_pass_vbrmin_section / 100);
- rc->min_frame_bandwidth =
- VPXMAX(rc->min_frame_bandwidth, FRAME_OVERHEAD_BITS);
- // A maximum bitrate for a frame is defined.
- // However this limit is extended if a very high rate is given on the command
- // line or the the rate cannnot be acheived because of a user specificed max q
- // (e.g. when the user specifies lossless encode).
- //
- // If a level is specified that requires a lower maximum rate then the level
- // value take precedence.
- vbr_max_bits =
- (int)(((int64_t)rc->avg_frame_bandwidth * oxcf->two_pass_vbrmax_section) /
- 100);
- rc->max_frame_bandwidth =
- VPXMAX(VPXMAX((cm->MBs * MAX_MB_RATE), MAXRATE_1080P), vbr_max_bits);
- vp9_rc_set_gf_interval_range(cpi, rc);
- }
- #define VBR_PCT_ADJUSTMENT_LIMIT 50
- // For VBR...adjustment to the frame target based on error from previous frames
- static void vbr_rate_correction(VP9_COMP *cpi, int *this_frame_target) {
- RATE_CONTROL *const rc = &cpi->rc;
- int64_t vbr_bits_off_target = rc->vbr_bits_off_target;
- int max_delta;
- int frame_window = VPXMIN(16, ((int)cpi->twopass.total_stats.count -
- cpi->common.current_video_frame));
- // Calcluate the adjustment to rate for this frame.
- if (frame_window > 0) {
- max_delta = (vbr_bits_off_target > 0)
- ? (int)(vbr_bits_off_target / frame_window)
- : (int)(-vbr_bits_off_target / frame_window);
- max_delta = VPXMIN(max_delta,
- ((*this_frame_target * VBR_PCT_ADJUSTMENT_LIMIT) / 100));
- // vbr_bits_off_target > 0 means we have extra bits to spend
- if (vbr_bits_off_target > 0) {
- *this_frame_target += (vbr_bits_off_target > max_delta)
- ? max_delta
- : (int)vbr_bits_off_target;
- } else {
- *this_frame_target -= (vbr_bits_off_target < -max_delta)
- ? max_delta
- : (int)-vbr_bits_off_target;
- }
- }
- // Fast redistribution of bits arising from massive local undershoot.
- // Dont do it for kf,arf,gf or overlay frames.
- if (!frame_is_kf_gf_arf(cpi) && !rc->is_src_frame_alt_ref &&
- rc->vbr_bits_off_target_fast) {
- int one_frame_bits = VPXMAX(rc->avg_frame_bandwidth, *this_frame_target);
- int fast_extra_bits;
- fast_extra_bits = (int)VPXMIN(rc->vbr_bits_off_target_fast, one_frame_bits);
- fast_extra_bits = (int)VPXMIN(
- fast_extra_bits,
- VPXMAX(one_frame_bits / 8, rc->vbr_bits_off_target_fast / 8));
- *this_frame_target += (int)fast_extra_bits;
- rc->vbr_bits_off_target_fast -= fast_extra_bits;
- }
- }
- void vp9_set_target_rate(VP9_COMP *cpi) {
- RATE_CONTROL *const rc = &cpi->rc;
- int target_rate = rc->base_frame_target;
- if (cpi->common.frame_type == KEY_FRAME)
- target_rate = vp9_rc_clamp_iframe_target_size(cpi, target_rate);
- else
- target_rate = vp9_rc_clamp_pframe_target_size(cpi, target_rate);
- if (!cpi->oxcf.vbr_corpus_complexity) {
- // Correction to rate target based on prior over or under shoot.
- if (cpi->oxcf.rc_mode == VPX_VBR || cpi->oxcf.rc_mode == VPX_CQ)
- vbr_rate_correction(cpi, &target_rate);
- }
- vp9_rc_set_frame_target(cpi, target_rate);
- }
- // Check if we should resize, based on average QP from past x frames.
- // Only allow for resize at most one scale down for now, scaling factor is 2.
- int vp9_resize_one_pass_cbr(VP9_COMP *cpi) {
- const VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- RESIZE_ACTION resize_action = NO_RESIZE;
- int avg_qp_thr1 = 70;
- int avg_qp_thr2 = 50;
- int min_width = 180;
- int min_height = 180;
- int down_size_on = 1;
- cpi->resize_scale_num = 1;
- cpi->resize_scale_den = 1;
- // Don't resize on key frame; reset the counters on key frame.
- if (cm->frame_type == KEY_FRAME) {
- cpi->resize_avg_qp = 0;
- cpi->resize_count = 0;
- return 0;
- }
- // Check current frame reslution to avoid generating frames smaller than
- // the minimum resolution.
- if (ONEHALFONLY_RESIZE) {
- if ((cm->width >> 1) < min_width || (cm->height >> 1) < min_height)
- down_size_on = 0;
- } else {
- if (cpi->resize_state == ORIG &&
- (cm->width * 3 / 4 < min_width || cm->height * 3 / 4 < min_height))
- return 0;
- else if (cpi->resize_state == THREE_QUARTER &&
- ((cpi->oxcf.width >> 1) < min_width ||
- (cpi->oxcf.height >> 1) < min_height))
- down_size_on = 0;
- }
- #if CONFIG_VP9_TEMPORAL_DENOISING
- // If denoiser is on, apply a smaller qp threshold.
- if (cpi->oxcf.noise_sensitivity > 0) {
- avg_qp_thr1 = 60;
- avg_qp_thr2 = 40;
- }
- #endif
- // Resize based on average buffer underflow and QP over some window.
- // Ignore samples close to key frame, since QP is usually high after key.
- if (cpi->rc.frames_since_key > 2 * cpi->framerate) {
- const int window = (int)(4 * cpi->framerate);
- cpi->resize_avg_qp += cm->base_qindex;
- if (cpi->rc.buffer_level < (int)(30 * rc->optimal_buffer_level / 100))
- ++cpi->resize_buffer_underflow;
- ++cpi->resize_count;
- // Check for resize action every "window" frames.
- if (cpi->resize_count >= window) {
- int avg_qp = cpi->resize_avg_qp / cpi->resize_count;
- // Resize down if buffer level has underflowed sufficient amount in past
- // window, and we are at original or 3/4 of original resolution.
- // Resize back up if average QP is low, and we are currently in a resized
- // down state, i.e. 1/2 or 3/4 of original resolution.
- // Currently, use a flag to turn 3/4 resizing feature on/off.
- if (cpi->resize_buffer_underflow > (cpi->resize_count >> 2)) {
- if (cpi->resize_state == THREE_QUARTER && down_size_on) {
- resize_action = DOWN_ONEHALF;
- cpi->resize_state = ONE_HALF;
- } else if (cpi->resize_state == ORIG) {
- resize_action = ONEHALFONLY_RESIZE ? DOWN_ONEHALF : DOWN_THREEFOUR;
- cpi->resize_state = ONEHALFONLY_RESIZE ? ONE_HALF : THREE_QUARTER;
- }
- } else if (cpi->resize_state != ORIG &&
- avg_qp < avg_qp_thr1 * cpi->rc.worst_quality / 100) {
- if (cpi->resize_state == THREE_QUARTER ||
- avg_qp < avg_qp_thr2 * cpi->rc.worst_quality / 100 ||
- ONEHALFONLY_RESIZE) {
- resize_action = UP_ORIG;
- cpi->resize_state = ORIG;
- } else if (cpi->resize_state == ONE_HALF) {
- resize_action = UP_THREEFOUR;
- cpi->resize_state = THREE_QUARTER;
- }
- }
- // Reset for next window measurement.
- cpi->resize_avg_qp = 0;
- cpi->resize_count = 0;
- cpi->resize_buffer_underflow = 0;
- }
- }
- // If decision is to resize, reset some quantities, and check is we should
- // reduce rate correction factor,
- if (resize_action != NO_RESIZE) {
- int target_bits_per_frame;
- int active_worst_quality;
- int qindex;
- int tot_scale_change;
- if (resize_action == DOWN_THREEFOUR || resize_action == UP_THREEFOUR) {
- cpi->resize_scale_num = 3;
- cpi->resize_scale_den = 4;
- } else if (resize_action == DOWN_ONEHALF) {
- cpi->resize_scale_num = 1;
- cpi->resize_scale_den = 2;
- } else { // UP_ORIG or anything else
- cpi->resize_scale_num = 1;
- cpi->resize_scale_den = 1;
- }
- tot_scale_change = (cpi->resize_scale_den * cpi->resize_scale_den) /
- (cpi->resize_scale_num * cpi->resize_scale_num);
- // Reset buffer level to optimal, update target size.
- rc->buffer_level = rc->optimal_buffer_level;
- rc->bits_off_target = rc->optimal_buffer_level;
- rc->this_frame_target = calc_pframe_target_size_one_pass_cbr(cpi);
- // Get the projected qindex, based on the scaled target frame size (scaled
- // so target_bits_per_mb in vp9_rc_regulate_q will be correct target).
- target_bits_per_frame = (resize_action >= 0)
- ? rc->this_frame_target * tot_scale_change
- : rc->this_frame_target / tot_scale_change;
- active_worst_quality = calc_active_worst_quality_one_pass_cbr(cpi);
- qindex = vp9_rc_regulate_q(cpi, target_bits_per_frame, rc->best_quality,
- active_worst_quality);
- // If resize is down, check if projected q index is close to worst_quality,
- // and if so, reduce the rate correction factor (since likely can afford
- // lower q for resized frame).
- if (resize_action > 0 && qindex > 90 * cpi->rc.worst_quality / 100) {
- rc->rate_correction_factors[INTER_NORMAL] *= 0.85;
- }
- // If resize is back up, check if projected q index is too much above the
- // current base_qindex, and if so, reduce the rate correction factor
- // (since prefer to keep q for resized frame at least close to previous q).
- if (resize_action < 0 && qindex > 130 * cm->base_qindex / 100) {
- rc->rate_correction_factors[INTER_NORMAL] *= 0.9;
- }
- }
- return resize_action;
- }
- static void adjust_gf_boost_lag_one_pass_vbr(VP9_COMP *cpi,
- uint64_t avg_sad_current) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- int target;
- int found = 0;
- int found2 = 0;
- int frame;
- int i;
- uint64_t avg_source_sad_lag = avg_sad_current;
- int high_source_sad_lagindex = -1;
- int steady_sad_lagindex = -1;
- uint32_t sad_thresh1 = 70000;
- uint32_t sad_thresh2 = 120000;
- int low_content = 0;
- int high_content = 0;
- double rate_err = 1.0;
- // Get measure of complexity over the future frames, and get the first
- // future frame with high_source_sad/scene-change.
- int tot_frames = (int)vp9_lookahead_depth(cpi->lookahead) - 1;
- for (frame = tot_frames; frame >= 1; --frame) {
- const int lagframe_idx = tot_frames - frame + 1;
- uint64_t reference_sad = rc->avg_source_sad[0];
- for (i = 1; i < lagframe_idx; ++i) {
- if (rc->avg_source_sad[i] > 0)
- reference_sad = (3 * reference_sad + rc->avg_source_sad[i]) >> 2;
- }
- // Detect up-coming scene change.
- if (!found &&
- (rc->avg_source_sad[lagframe_idx] >
- VPXMAX(sad_thresh1, (unsigned int)(reference_sad << 1)) ||
- rc->avg_source_sad[lagframe_idx] >
- VPXMAX(3 * sad_thresh1 >> 2,
- (unsigned int)(reference_sad << 2)))) {
- high_source_sad_lagindex = lagframe_idx;
- found = 1;
- }
- // Detect change from motion to steady.
- if (!found2 && lagframe_idx > 1 && lagframe_idx < tot_frames &&
- rc->avg_source_sad[lagframe_idx - 1] > (sad_thresh1 >> 2)) {
- found2 = 1;
- for (i = lagframe_idx; i < tot_frames; ++i) {
- if (!(rc->avg_source_sad[i] > 0 &&
- rc->avg_source_sad[i] < (sad_thresh1 >> 2) &&
- rc->avg_source_sad[i] <
- (rc->avg_source_sad[lagframe_idx - 1] >> 1))) {
- found2 = 0;
- i = tot_frames;
- }
- }
- if (found2) steady_sad_lagindex = lagframe_idx;
- }
- avg_source_sad_lag += rc->avg_source_sad[lagframe_idx];
- }
- if (tot_frames > 0) avg_source_sad_lag = avg_source_sad_lag / tot_frames;
- // Constrain distance between detected scene cuts.
- if (high_source_sad_lagindex != -1 &&
- high_source_sad_lagindex != rc->high_source_sad_lagindex - 1 &&
- abs(high_source_sad_lagindex - rc->high_source_sad_lagindex) < 4)
- rc->high_source_sad_lagindex = -1;
- else
- rc->high_source_sad_lagindex = high_source_sad_lagindex;
- // Adjust some factors for the next GF group, ignore initial key frame,
- // and only for lag_in_frames not too small.
- if (cpi->refresh_golden_frame == 1 && cm->current_video_frame > 30 &&
- cpi->oxcf.lag_in_frames > 8) {
- int frame_constraint;
- if (rc->rolling_target_bits > 0)
- rate_err =
- (double)rc->rolling_actual_bits / (double)rc->rolling_target_bits;
- high_content = high_source_sad_lagindex != -1 ||
- avg_source_sad_lag > (rc->prev_avg_source_sad_lag << 1) ||
- avg_source_sad_lag > sad_thresh2;
- low_content = high_source_sad_lagindex == -1 &&
- ((avg_source_sad_lag < (rc->prev_avg_source_sad_lag >> 1)) ||
- (avg_source_sad_lag < sad_thresh1));
- if (low_content) {
- rc->gfu_boost = DEFAULT_GF_BOOST;
- rc->baseline_gf_interval =
- VPXMIN(15, (3 * rc->baseline_gf_interval) >> 1);
- } else if (high_content) {
- rc->gfu_boost = DEFAULT_GF_BOOST >> 1;
- rc->baseline_gf_interval = (rate_err > 3.0)
- ? VPXMAX(10, rc->baseline_gf_interval >> 1)
- : VPXMAX(6, rc->baseline_gf_interval >> 1);
- }
- if (rc->baseline_gf_interval > cpi->oxcf.lag_in_frames - 1)
- rc->baseline_gf_interval = cpi->oxcf.lag_in_frames - 1;
- // Check for constraining gf_interval for up-coming scene/content changes,
- // or for up-coming key frame, whichever is closer.
- frame_constraint = rc->frames_to_key;
- if (rc->high_source_sad_lagindex > 0 &&
- frame_constraint > rc->high_source_sad_lagindex)
- frame_constraint = rc->high_source_sad_lagindex;
- if (steady_sad_lagindex > 3 && frame_constraint > steady_sad_lagindex)
- frame_constraint = steady_sad_lagindex;
- adjust_gfint_frame_constraint(cpi, frame_constraint);
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- // Adjust factors for active_worst setting & af_ratio for next gf interval.
- rc->fac_active_worst_inter = 150; // corresponds to 3/2 (= 150 /100).
- rc->fac_active_worst_gf = 100;
- if (rate_err < 2.0 && !high_content) {
- rc->fac_active_worst_inter = 120;
- rc->fac_active_worst_gf = 90;
- } else if (rate_err > 8.0 && rc->avg_frame_qindex[INTER_FRAME] < 16) {
- // Increase active_worst faster at low Q if rate fluctuation is high.
- rc->fac_active_worst_inter = 200;
- if (rc->avg_frame_qindex[INTER_FRAME] < 8)
- rc->fac_active_worst_inter = 400;
- }
- if (low_content && rc->avg_frame_low_motion > 80) {
- rc->af_ratio_onepass_vbr = 15;
- } else if (high_content || rc->avg_frame_low_motion < 30) {
- rc->af_ratio_onepass_vbr = 5;
- rc->gfu_boost = DEFAULT_GF_BOOST >> 2;
- }
- if (cpi->sf.use_altref_onepass && cpi->oxcf.enable_auto_arf) {
- // Flag to disable usage of ARF based on past usage, only allow this
- // disabling if current frame/group does not start with key frame or
- // scene cut. Note perc_arf_usage is only computed for speed >= 5.
- int arf_usage_low =
- (cm->frame_type != KEY_FRAME && !rc->high_source_sad &&
- cpi->rc.perc_arf_usage < 15 && cpi->oxcf.speed >= 5);
- // Don't use alt-ref for this group under certain conditions.
- if (arf_usage_low ||
- (rc->high_source_sad_lagindex > 0 &&
- rc->high_source_sad_lagindex <= rc->frames_till_gf_update_due) ||
- (avg_source_sad_lag > 3 * sad_thresh1 >> 3)) {
- rc->source_alt_ref_pending = 0;
- rc->alt_ref_gf_group = 0;
- } else {
- rc->source_alt_ref_pending = 1;
- rc->alt_ref_gf_group = 1;
- // If alt-ref is used for this gf group, limit the interval.
- if (rc->baseline_gf_interval > 12) {
- rc->baseline_gf_interval = 12;
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- }
- }
- }
- target = calc_pframe_target_size_one_pass_vbr(cpi);
- vp9_rc_set_frame_target(cpi, target);
- }
- rc->prev_avg_source_sad_lag = avg_source_sad_lag;
- }
- // Compute average source sad (temporal sad: between current source and
- // previous source) over a subset of superblocks. Use this is detect big changes
- // in content and allow rate control to react.
- // This function also handles special case of lag_in_frames, to measure content
- // level in #future frames set by the lag_in_frames.
- void vp9_scene_detection_onepass(VP9_COMP *cpi) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- YV12_BUFFER_CONFIG const *unscaled_src = cpi->un_scaled_source;
- YV12_BUFFER_CONFIG const *unscaled_last_src = cpi->unscaled_last_source;
- uint8_t *src_y;
- int src_ystride;
- int src_width;
- int src_height;
- uint8_t *last_src_y;
- int last_src_ystride;
- int last_src_width;
- int last_src_height;
- if (cpi->un_scaled_source == NULL || cpi->unscaled_last_source == NULL ||
- (cpi->use_svc && cpi->svc.current_superframe == 0))
- return;
- src_y = unscaled_src->y_buffer;
- src_ystride = unscaled_src->y_stride;
- src_width = unscaled_src->y_width;
- src_height = unscaled_src->y_height;
- last_src_y = unscaled_last_src->y_buffer;
- last_src_ystride = unscaled_last_src->y_stride;
- last_src_width = unscaled_last_src->y_width;
- last_src_height = unscaled_last_src->y_height;
- #if CONFIG_VP9_HIGHBITDEPTH
- if (cm->use_highbitdepth) return;
- #endif
- rc->high_source_sad = 0;
- rc->high_num_blocks_with_motion = 0;
- // For SVC: scene detection is only checked on first spatial layer of
- // the superframe using the original/unscaled resolutions.
- if (cpi->svc.spatial_layer_id == cpi->svc.first_spatial_layer_to_encode &&
- src_width == last_src_width && src_height == last_src_height) {
- YV12_BUFFER_CONFIG *frames[MAX_LAG_BUFFERS] = { NULL };
- int num_mi_cols = cm->mi_cols;
- int num_mi_rows = cm->mi_rows;
- int start_frame = 0;
- int frames_to_buffer = 1;
- int frame = 0;
- int scene_cut_force_key_frame = 0;
- int num_zero_temp_sad = 0;
- uint64_t avg_sad_current = 0;
- uint32_t min_thresh = 10000;
- float thresh = 8.0f;
- uint32_t thresh_key = 140000;
- if (cpi->oxcf.speed <= 5) thresh_key = 240000;
- if (cpi->oxcf.content != VP9E_CONTENT_SCREEN) min_thresh = 65000;
- if (cpi->oxcf.rc_mode == VPX_VBR) thresh = 2.1f;
- if (cpi->use_svc && cpi->svc.number_spatial_layers > 1) {
- const int aligned_width = ALIGN_POWER_OF_TWO(src_width, MI_SIZE_LOG2);
- const int aligned_height = ALIGN_POWER_OF_TWO(src_height, MI_SIZE_LOG2);
- num_mi_cols = aligned_width >> MI_SIZE_LOG2;
- num_mi_rows = aligned_height >> MI_SIZE_LOG2;
- }
- if (cpi->oxcf.lag_in_frames > 0) {
- frames_to_buffer = (cm->current_video_frame == 1)
- ? (int)vp9_lookahead_depth(cpi->lookahead) - 1
- : 2;
- start_frame = (int)vp9_lookahead_depth(cpi->lookahead) - 1;
- for (frame = 0; frame < frames_to_buffer; ++frame) {
- const int lagframe_idx = start_frame - frame;
- if (lagframe_idx >= 0) {
- struct lookahead_entry *buf =
- vp9_lookahead_peek(cpi->lookahead, lagframe_idx);
- frames[frame] = &buf->img;
- }
- }
- // The avg_sad for this current frame is the value of frame#1
- // (first future frame) from previous frame.
- avg_sad_current = rc->avg_source_sad[1];
- if (avg_sad_current >
- VPXMAX(min_thresh,
- (unsigned int)(rc->avg_source_sad[0] * thresh)) &&
- cm->current_video_frame > (unsigned int)cpi->oxcf.lag_in_frames)
- rc->high_source_sad = 1;
- else
- rc->high_source_sad = 0;
- if (rc->high_source_sad && avg_sad_current > thresh_key)
- scene_cut_force_key_frame = 1;
- // Update recursive average for current frame.
- if (avg_sad_current > 0)
- rc->avg_source_sad[0] =
- (3 * rc->avg_source_sad[0] + avg_sad_current) >> 2;
- // Shift back data, starting at frame#1.
- for (frame = 1; frame < cpi->oxcf.lag_in_frames - 1; ++frame)
- rc->avg_source_sad[frame] = rc->avg_source_sad[frame + 1];
- }
- for (frame = 0; frame < frames_to_buffer; ++frame) {
- if (cpi->oxcf.lag_in_frames == 0 ||
- (frames[frame] != NULL && frames[frame + 1] != NULL &&
- frames[frame]->y_width == frames[frame + 1]->y_width &&
- frames[frame]->y_height == frames[frame + 1]->y_height)) {
- int sbi_row, sbi_col;
- const int lagframe_idx =
- (cpi->oxcf.lag_in_frames == 0) ? 0 : start_frame - frame + 1;
- const BLOCK_SIZE bsize = BLOCK_64X64;
- // Loop over sub-sample of frame, compute average sad over 64x64 blocks.
- uint64_t avg_sad = 0;
- uint64_t tmp_sad = 0;
- int num_samples = 0;
- int sb_cols = (num_mi_cols + MI_BLOCK_SIZE - 1) / MI_BLOCK_SIZE;
- int sb_rows = (num_mi_rows + MI_BLOCK_SIZE - 1) / MI_BLOCK_SIZE;
- if (cpi->oxcf.lag_in_frames > 0) {
- src_y = frames[frame]->y_buffer;
- src_ystride = frames[frame]->y_stride;
- last_src_y = frames[frame + 1]->y_buffer;
- last_src_ystride = frames[frame + 1]->y_stride;
- }
- num_zero_temp_sad = 0;
- for (sbi_row = 0; sbi_row < sb_rows; ++sbi_row) {
- for (sbi_col = 0; sbi_col < sb_cols; ++sbi_col) {
- // Checker-board pattern, ignore boundary.
- if (((sbi_row > 0 && sbi_col > 0) &&
- (sbi_row < sb_rows - 1 && sbi_col < sb_cols - 1) &&
- ((sbi_row % 2 == 0 && sbi_col % 2 == 0) ||
- (sbi_row % 2 != 0 && sbi_col % 2 != 0)))) {
- tmp_sad = cpi->fn_ptr[bsize].sdf(src_y, src_ystride, last_src_y,
- last_src_ystride);
- avg_sad += tmp_sad;
- num_samples++;
- if (tmp_sad == 0) num_zero_temp_sad++;
- }
- src_y += 64;
- last_src_y += 64;
- }
- src_y += (src_ystride << 6) - (sb_cols << 6);
- last_src_y += (last_src_ystride << 6) - (sb_cols << 6);
- }
- if (num_samples > 0) avg_sad = avg_sad / num_samples;
- // Set high_source_sad flag if we detect very high increase in avg_sad
- // between current and previous frame value(s). Use minimum threshold
- // for cases where there is small change from content that is completely
- // static.
- if (lagframe_idx == 0) {
- if (avg_sad >
- VPXMAX(min_thresh,
- (unsigned int)(rc->avg_source_sad[0] * thresh)) &&
- rc->frames_since_key > 1 + cpi->svc.number_spatial_layers &&
- num_zero_temp_sad < 3 * (num_samples >> 2))
- rc->high_source_sad = 1;
- else
- rc->high_source_sad = 0;
- if (rc->high_source_sad && avg_sad > thresh_key)
- scene_cut_force_key_frame = 1;
- if (avg_sad > 0 || cpi->oxcf.rc_mode == VPX_CBR)
- rc->avg_source_sad[0] = (3 * rc->avg_source_sad[0] + avg_sad) >> 2;
- } else {
- rc->avg_source_sad[lagframe_idx] = avg_sad;
- }
- if (num_zero_temp_sad < (3 * num_samples >> 2))
- rc->high_num_blocks_with_motion = 1;
- }
- }
- // For CBR non-screen content mode, check if we should reset the rate
- // control. Reset is done if high_source_sad is detected and the rate
- // control is at very low QP with rate correction factor at min level.
- if (cpi->oxcf.rc_mode == VPX_CBR &&
- cpi->oxcf.content != VP9E_CONTENT_SCREEN && !cpi->use_svc) {
- if (rc->high_source_sad && rc->last_q[INTER_FRAME] == rc->best_quality &&
- rc->avg_frame_qindex[INTER_FRAME] < (rc->best_quality << 1) &&
- rc->rate_correction_factors[INTER_NORMAL] == MIN_BPB_FACTOR) {
- rc->rate_correction_factors[INTER_NORMAL] = 0.5;
- rc->avg_frame_qindex[INTER_FRAME] = rc->worst_quality;
- rc->buffer_level = rc->optimal_buffer_level;
- rc->bits_off_target = rc->optimal_buffer_level;
- rc->reset_high_source_sad = 1;
- }
- if (cm->frame_type != KEY_FRAME && rc->reset_high_source_sad)
- rc->this_frame_target = rc->avg_frame_bandwidth;
- }
- // For SVC the new (updated) avg_source_sad[0] for the current superframe
- // updates the setting for all layers.
- if (cpi->use_svc) {
- int sl, tl;
- SVC *const svc = &cpi->svc;
- for (sl = 0; sl < svc->number_spatial_layers; ++sl)
- for (tl = 0; tl < svc->number_temporal_layers; ++tl) {
- int layer = LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers);
- LAYER_CONTEXT *const lc = &svc->layer_context[layer];
- RATE_CONTROL *const lrc = &lc->rc;
- lrc->avg_source_sad[0] = rc->avg_source_sad[0];
- }
- }
- // For VBR, under scene change/high content change, force golden refresh.
- if (cpi->oxcf.rc_mode == VPX_VBR && cm->frame_type != KEY_FRAME &&
- rc->high_source_sad && rc->frames_to_key > 3 &&
- rc->count_last_scene_change > 4 &&
- cpi->ext_refresh_frame_flags_pending == 0) {
- int target;
- cpi->refresh_golden_frame = 1;
- if (scene_cut_force_key_frame) cm->frame_type = KEY_FRAME;
- rc->source_alt_ref_pending = 0;
- if (cpi->sf.use_altref_onepass && cpi->oxcf.enable_auto_arf)
- rc->source_alt_ref_pending = 1;
- rc->gfu_boost = DEFAULT_GF_BOOST >> 1;
- rc->baseline_gf_interval =
- VPXMIN(20, VPXMAX(10, rc->baseline_gf_interval));
- adjust_gfint_frame_constraint(cpi, rc->frames_to_key);
- rc->frames_till_gf_update_due = rc->baseline_gf_interval;
- target = calc_pframe_target_size_one_pass_vbr(cpi);
- vp9_rc_set_frame_target(cpi, target);
- rc->count_last_scene_change = 0;
- } else {
- rc->count_last_scene_change++;
- }
- // If lag_in_frame is used, set the gf boost and interval.
- if (cpi->oxcf.lag_in_frames > 0)
- adjust_gf_boost_lag_one_pass_vbr(cpi, avg_sad_current);
- }
- }
- // Test if encoded frame will significantly overshoot the target bitrate, and
- // if so, set the QP, reset/adjust some rate control parameters, and return 1.
- // frame_size = -1 means frame has not been encoded.
- int vp9_encodedframe_overshoot(VP9_COMP *cpi, int frame_size, int *q) {
- VP9_COMMON *const cm = &cpi->common;
- RATE_CONTROL *const rc = &cpi->rc;
- SPEED_FEATURES *const sf = &cpi->sf;
- int thresh_qp = 7 * (rc->worst_quality >> 3);
- int thresh_rate = rc->avg_frame_bandwidth << 3;
- // Lower thresh_qp for video (more overshoot at lower Q) to be
- // more conservative for video.
- if (cpi->oxcf.content != VP9E_CONTENT_SCREEN)
- thresh_qp = 3 * (rc->worst_quality >> 2);
- // If this decision is not based on an encoded frame size but just on
- // scene/slide change detection (i.e., re_encode_overshoot_cbr_rt ==
- // FAST_DETECTION_MAXQ), for now skip the (frame_size > thresh_rate)
- // condition in this case.
- // TODO(marpan): Use a better size/rate condition for this case and
- // adjust thresholds.
- if ((sf->overshoot_detection_cbr_rt == FAST_DETECTION_MAXQ ||
- frame_size > thresh_rate) &&
- cm->base_qindex < thresh_qp) {
- double rate_correction_factor =
- cpi->rc.rate_correction_factors[INTER_NORMAL];
- const int target_size = cpi->rc.avg_frame_bandwidth;
- double new_correction_factor;
- int target_bits_per_mb;
- double q2;
- int enumerator;
- // Force a re-encode, and for now use max-QP.
- *q = cpi->rc.worst_quality;
- cpi->cyclic_refresh->counter_encode_maxq_scene_change = 0;
- cpi->rc.re_encode_maxq_scene_change = 1;
- // If the frame_size is much larger than the threshold (big content change)
- // and the encoded frame used alot of Intra modes, then force hybrid_intra
- // encoding for the re-encode on this scene change. hybrid_intra will
- // use rd-based intra mode selection for small blocks.
- if (sf->overshoot_detection_cbr_rt == RE_ENCODE_MAXQ &&
- frame_size > (thresh_rate << 1) && cpi->svc.spatial_layer_id == 0) {
- MODE_INFO **mi = cm->mi_grid_visible;
- int sum_intra_usage = 0;
- int mi_row, mi_col;
- int tot = 0;
- for (mi_row = 0; mi_row < cm->mi_rows; mi_row++) {
- for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
- if (mi[0]->ref_frame[0] == INTRA_FRAME) sum_intra_usage++;
- tot++;
- mi++;
- }
- mi += 8;
- }
- sum_intra_usage = 100 * sum_intra_usage / (cm->mi_rows * cm->mi_cols);
- if (sum_intra_usage > 60) cpi->rc.hybrid_intra_scene_change = 1;
- }
- // Adjust avg_frame_qindex, buffer_level, and rate correction factors, as
- // these parameters will affect QP selection for subsequent frames. If they
- // have settled down to a very different (low QP) state, then not adjusting
- // them may cause next frame to select low QP and overshoot again.
- cpi->rc.avg_frame_qindex[INTER_FRAME] = *q;
- rc->buffer_level = rc->optimal_buffer_level;
- rc->bits_off_target = rc->optimal_buffer_level;
- // Reset rate under/over-shoot flags.
- cpi->rc.rc_1_frame = 0;
- cpi->rc.rc_2_frame = 0;
- // Adjust rate correction factor.
- target_bits_per_mb =
- (int)(((uint64_t)target_size << BPER_MB_NORMBITS) / cm->MBs);
- // Rate correction factor based on target_bits_per_mb and qp (==max_QP).
- // This comes from the inverse computation of vp9_rc_bits_per_mb().
- q2 = vp9_convert_qindex_to_q(*q, cm->bit_depth);
- enumerator = 1800000; // Factor for inter frame.
- enumerator += (int)(enumerator * q2) >> 12;
- new_correction_factor = (double)target_bits_per_mb * q2 / enumerator;
- if (new_correction_factor > rate_correction_factor) {
- rate_correction_factor =
- VPXMIN(2.0 * rate_correction_factor, new_correction_factor);
- if (rate_correction_factor > MAX_BPB_FACTOR)
- rate_correction_factor = MAX_BPB_FACTOR;
- cpi->rc.rate_correction_factors[INTER_NORMAL] = rate_correction_factor;
- }
- // For temporal layers, reset the rate control parametes across all
- // temporal layers. If the first_spatial_layer_to_encode > 0, then this
- // superframe has skipped lower base layers. So in this case we should also
- // reset and force max-q for spatial layers < first_spatial_layer_to_encode.
- if (cpi->use_svc) {
- int tl = 0;
- int sl = 0;
- SVC *svc = &cpi->svc;
- for (sl = 0; sl < svc->first_spatial_layer_to_encode; ++sl) {
- for (tl = 0; tl < svc->number_temporal_layers; ++tl) {
- const int layer =
- LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers);
- LAYER_CONTEXT *lc = &svc->layer_context[layer];
- RATE_CONTROL *lrc = &lc->rc;
- lrc->avg_frame_qindex[INTER_FRAME] = *q;
- lrc->buffer_level = lrc->optimal_buffer_level;
- lrc->bits_off_target = lrc->optimal_buffer_level;
- lrc->rc_1_frame = 0;
- lrc->rc_2_frame = 0;
- lrc->rate_correction_factors[INTER_NORMAL] = rate_correction_factor;
- lrc->force_max_q = 1;
- }
- }
- }
- return 1;
- } else {
- return 0;
- }
- }
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