diff options
Diffstat (limited to 'third_party/aom/av1/encoder/ratectrl.c')
| -rw-r--r-- | third_party/aom/av1/encoder/ratectrl.c | 1776 |
1 files changed, 0 insertions, 1776 deletions
diff --git a/third_party/aom/av1/encoder/ratectrl.c b/third_party/aom/av1/encoder/ratectrl.c deleted file mode 100644 index 2597fb990..000000000 --- a/third_party/aom/av1/encoder/ratectrl.c +++ /dev/null @@ -1,1776 +0,0 @@ -/* - * Copyright (c) 2016, Alliance for Open Media. All rights reserved - * - * This source code is subject to the terms of the BSD 2 Clause License and - * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License - * was not distributed with this source code in the LICENSE file, you can - * obtain it at www.aomedia.org/license/software. If the Alliance for Open - * Media Patent License 1.0 was not distributed with this source code in the - * PATENTS file, you can obtain it at www.aomedia.org/license/patent. - */ - -#include <assert.h> -#include <limits.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "aom_dsp/aom_dsp_common.h" -#include "aom_mem/aom_mem.h" -#include "aom_ports/mem.h" -#include "aom_ports/system_state.h" - -#include "av1/common/alloccommon.h" -#include "av1/encoder/aq_cyclicrefresh.h" -#include "av1/common/common.h" -#include "av1/common/entropymode.h" -#include "av1/common/quant_common.h" -#include "av1/common/seg_common.h" - -#include "av1/encoder/encodemv.h" -#include "av1/encoder/random.h" -#include "av1/encoder/ratectrl.h" - -// Max rate target for 1080P and below encodes under normal circumstances -// (1920 * 1080 / (16 * 16)) * MAX_MB_RATE bits per MB -#define MAX_MB_RATE 250 -#define MAXRATE_1080P 2025000 - -#define DEFAULT_KF_BOOST 2000 -#define DEFAULT_GF_BOOST 2000 - -#define MIN_BPB_FACTOR 0.005 -#define MAX_BPB_FACTOR 50 - -#define FRAME_OVERHEAD_BITS 200 -#define ASSIGN_MINQ_TABLE(bit_depth, name) \ - do { \ - switch (bit_depth) { \ - case AOM_BITS_8: name = name##_8; break; \ - case AOM_BITS_10: name = name##_10; break; \ - case AOM_BITS_12: name = name##_12; break; \ - default: \ - assert(0 && \ - "bit_depth should be AOM_BITS_8, AOM_BITS_10" \ - " or AOM_BITS_12"); \ - name = NULL; \ - } \ - } while (0) - -// 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]; - -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]; - -static int gf_high = 2000; -static int gf_low = 400; -static int kf_high = 5000; -static int kf_low = 400; - -// How many times less pixels there are to encode given the current scaling. -// Temporary replacement for rcf_mult and rate_thresh_mult. -static double resize_rate_factor(const AV1_COMP *cpi, int width, int height) { - return (double)(cpi->oxcf.width * cpi->oxcf.height) / (width * height); -} - -// 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, - aom_bit_depth_t bit_depth) { - int i; - const double minqtarget = AOMMIN(((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 <= av1_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, - aom_bit_depth_t bit_depth) { - int i; - for (i = 0; i < QINDEX_RANGE; i++) { - const double maxq = av1_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); - arfgf_low[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.30, bit_depth); - arfgf_high[i] = get_minq_index(maxq, 0.0000021, -0.00125, 0.55, bit_depth); - inter[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.90, bit_depth); - rtc[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.70, bit_depth); - } -} - -void av1_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, AOM_BITS_8); - 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, AOM_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, AOM_BITS_12); -} - -// 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 av1_convert_qindex_to_q(int qindex, aom_bit_depth_t bit_depth) { - // Convert the index to a real Q value (scaled down to match old Q values) - switch (bit_depth) { - case AOM_BITS_8: return av1_ac_quant_Q3(qindex, 0, bit_depth) / 4.0; - case AOM_BITS_10: return av1_ac_quant_Q3(qindex, 0, bit_depth) / 16.0; - case AOM_BITS_12: return av1_ac_quant_Q3(qindex, 0, bit_depth) / 64.0; - default: - assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12"); - return -1.0; - } -} - -int av1_rc_bits_per_mb(FRAME_TYPE frame_type, int qindex, - double correction_factor, aom_bit_depth_t bit_depth) { - const double q = av1_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 av1_estimate_bits_at_q(FRAME_TYPE frame_type, int q, int mbs, - double correction_factor, - aom_bit_depth_t bit_depth) { - const int bpm = - (int)(av1_rc_bits_per_mb(frame_type, q, correction_factor, bit_depth)); - return AOMMAX(FRAME_OVERHEAD_BITS, - (int)((uint64_t)bpm * mbs) >> BPER_MB_NORMBITS); -} - -int av1_rc_clamp_pframe_target_size(const AV1_COMP *const cpi, int target) { - const RATE_CONTROL *rc = &cpi->rc; - const AV1EncoderConfig *oxcf = &cpi->oxcf; - const int min_frame_target = - AOMMAX(rc->min_frame_bandwidth, rc->avg_frame_bandwidth >> 5); - // Clip the frame target to the minimum setup value. - if (cpi->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; - } else if (target < min_frame_target) { - 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 = AOMMIN(target, max_rate); - } - - return target; -} - -int av1_rc_clamp_iframe_target_size(const AV1_COMP *const cpi, int target) { - const RATE_CONTROL *rc = &cpi->rc; - const AV1EncoderConfig *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 = AOMMIN(target, max_rate); - } - if (target > rc->max_frame_bandwidth) target = rc->max_frame_bandwidth; - return target; -} - -// Update the buffer level: leaky bucket model. -static void update_buffer_level(AV1_COMP *cpi, int encoded_frame_size) { - const AV1_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - - // Non-viewable frames are a special case and are treated as pure overhead. - // TODO(zoeliu): To further explore whether we should treat BWDREF_FRAME - // differently, since it is a no-show frame. - if (!cm->show_frame && !rc->is_bwd_ref_frame) - rc->bits_off_target -= encoded_frame_size; - else - rc->bits_off_target += rc->avg_frame_bandwidth - encoded_frame_size; - - // Clip the buffer level to the maximum specified buffer size. - rc->bits_off_target = AOMMIN(rc->bits_off_target, rc->maximum_buffer_size); - rc->buffer_level = rc->bits_off_target; -} - -int av1_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 AOMMAX(default_interval, - (int)(MIN_GF_INTERVAL * factor / factor_safe + 0.5)); - // Note this logic makes: - // 4K24: 5 - // 4K30: 6 - // 4K60: 12 -} - -int av1_rc_get_default_max_gf_interval(double framerate, int min_gf_interval) { - int interval = AOMMIN(MAX_GF_INTERVAL, (int)(framerate * 0.75)); - interval += (interval & 0x01); // Round to even value -#if CONFIG_FIX_GF_LENGTH - interval = AOMMAX(FIXED_GF_LENGTH, interval); -#endif - return AOMMAX(interval, min_gf_interval); -} - -void av1_rc_init(const AV1EncoderConfig *oxcf, int pass, RATE_CONTROL *rc) { - int i; - - if (pass == 0 && oxcf->rc_mode == AOM_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->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 = av1_convert_qindex_to_q(oxcf->worst_allowed_q, oxcf->bit_depth); - - for (i = 0; i < RATE_FACTOR_LEVELS; ++i) { - rc->rate_correction_factors[i] = 0.7; - } - rc->rate_correction_factors[KF_STD] = 1.0; - 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 = av1_rc_get_default_min_gf_interval( - oxcf->width, oxcf->height, oxcf->init_framerate); - if (rc->max_gf_interval == 0) - rc->max_gf_interval = av1_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; -} - -int av1_rc_drop_frame(AV1_COMP *cpi) { - const AV1EncoderConfig *oxcf = &cpi->oxcf; - RATE_CONTROL *const rc = &cpi->rc; - - if (!oxcf->drop_frames_water_mark) { - return 0; - } else { - if (rc->buffer_level < 0) { - // 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)(oxcf->drop_frames_water_mark * rc->optimal_buffer_level / 100); - if ((rc->buffer_level > drop_mark) && (rc->decimation_factor > 0)) { - --rc->decimation_factor; - } else if (rc->buffer_level <= 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; - } - } - } -} - -static double get_rate_correction_factor(const AV1_COMP *cpi, int width, - int height) { - const RATE_CONTROL *const rc = &cpi->rc; - double rcf; - - if (cpi->common.frame_type == KEY_FRAME) { - 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->oxcf.rc_mode != AOM_CBR || cpi->oxcf.gf_cbr_boost_pct > 20)) - rcf = rc->rate_correction_factors[GF_ARF_STD]; - else - rcf = rc->rate_correction_factors[INTER_NORMAL]; - } - rcf *= resize_rate_factor(cpi, width, height); - return fclamp(rcf, MIN_BPB_FACTOR, MAX_BPB_FACTOR); -} - -static void set_rate_correction_factor(AV1_COMP *cpi, double factor, int width, - int height) { - RATE_CONTROL *const rc = &cpi->rc; - - // Normalize RCF to account for the size-dependent scaling factor. - factor /= resize_rate_factor(cpi, width, height); - - factor = fclamp(factor, MIN_BPB_FACTOR, MAX_BPB_FACTOR); - - if (cpi->common.frame_type == KEY_FRAME) { - 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->oxcf.rc_mode != AOM_CBR || cpi->oxcf.gf_cbr_boost_pct > 20)) - rc->rate_correction_factors[GF_ARF_STD] = factor; - else - rc->rate_correction_factors[INTER_NORMAL] = factor; - } -} - -void av1_rc_update_rate_correction_factors(AV1_COMP *cpi, int width, - int height) { - const AV1_COMMON *const cm = &cpi->common; - int correction_factor = 100; - double rate_correction_factor = - get_rate_correction_factor(cpi, width, height); - double adjustment_limit; - const int MBs = av1_get_MBs(width, height); - - 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 - aom_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 = - av1_cyclic_refresh_estimate_bits_at_q(cpi, rate_correction_factor); - } else { - projected_size_based_on_q = av1_estimate_bits_at_q( - cpi->common.frame_type, cm->base_qindex, MBs, rate_correction_factor, - cm->seq_params.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); - - // More heavily damped adjustment used if we have been oscillating either side - // of target. - if (correction_factor > 0) { - adjustment_limit = - 0.25 + 0.5 * AOMMIN(1, fabs(log10(0.01 * correction_factor))); - } else { - adjustment_limit = 0.75; - } - - 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; - - 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, width, height); -} - -int av1_rc_regulate_q(const AV1_COMP *cpi, int target_bits_per_frame, - int active_best_quality, int active_worst_quality, - int width, int height) { - const AV1_COMMON *const cm = &cpi->common; - int q = active_worst_quality; - int last_error = INT_MAX; - int i, target_bits_per_mb, bits_per_mb_at_this_q; - const int MBs = av1_get_MBs(width, height); - const double correction_factor = - get_rate_correction_factor(cpi, width, height); - - // 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) / MBs; - - i = active_best_quality; - - do { - if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled) { - bits_per_mb_at_this_q = - (int)av1_cyclic_refresh_rc_bits_per_mb(cpi, i, correction_factor); - } else { - bits_per_mb_at_this_q = (int)av1_rc_bits_per_mb( - cm->frame_type, i, correction_factor, cm->seq_params.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); - - // In CBR mode, this makes sure q is between oscillating Qs to prevent - // resonance. - if (cpi->oxcf.rc_mode == AOM_CBR && - (cpi->rc.rc_1_frame * cpi->rc.rc_2_frame == -1) && - cpi->rc.q_1_frame != cpi->rc.q_2_frame) { - q = clamp(q, AOMMIN(cpi->rc.q_1_frame, cpi->rc.q_2_frame), - AOMMAX(cpi->rc.q_1_frame, cpi->rc.q_2_frame)); - } - 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, - aom_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 RATE_CONTROL *const rc, int q, - aom_bit_depth_t bit_depth) { - int *arfgf_low_motion_minq; - int *arfgf_high_motion_minq; - ASSIGN_MINQ_TABLE(bit_depth, arfgf_low_motion_minq); - ASSIGN_MINQ_TABLE(bit_depth, arfgf_high_motion_minq); - return get_active_quality(q, rc->gfu_boost, gf_low, gf_high, - arfgf_low_motion_minq, arfgf_high_motion_minq); -} - -#if REDUCE_LAST_ALT_BOOST -static int get_gf_high_motion_quality(int q, aom_bit_depth_t bit_depth) { - int *arfgf_high_motion_minq; - ASSIGN_MINQ_TABLE(bit_depth, arfgf_high_motion_minq); - return arfgf_high_motion_minq[q]; -} -#endif - -static int calc_active_worst_quality_one_pass_vbr(const AV1_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] * 2; - } else { - if (!rc->is_src_frame_alt_ref && - (cpi->refresh_golden_frame || cpi->refresh_alt2_ref_frame || - cpi->refresh_alt_ref_frame)) { - active_worst_quality = curr_frame == 1 ? rc->last_q[KEY_FRAME] * 5 / 4 - : rc->last_q[INTER_FRAME]; - } else { - active_worst_quality = curr_frame == 1 ? rc->last_q[KEY_FRAME] * 2 - : rc->last_q[INTER_FRAME] * 2; - } - } - return AOMMIN(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 AV1_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 AV1_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; - if (cm->frame_type == KEY_FRAME) 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 < 5) - ? AOMMIN(rc->avg_frame_qindex[INTER_FRAME], - rc->avg_frame_qindex[KEY_FRAME]) - : rc->avg_frame_qindex[INTER_FRAME]; - active_worst_quality = AOMMIN(rc->worst_quality, ambient_qp * 5 / 4); - if (rc->buffer_level > rc->optimal_buffer_level) { - // Adjust down. - // Maximum limit for down adjustment, ~30%. - int 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 AV1_COMP *cpi, int width, - int height, int *bottom_index, - int *top_index) { - const AV1_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; - const int bit_depth = cm->seq_params.bit_depth; - ASSIGN_MINQ_TABLE(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 = av1_convert_qindex_to_q(qindex, bit_depth); - int delta_qindex = av1_compute_qdelta(rc, last_boosted_q, - (last_boosted_q * 0.75), bit_depth); - active_best_quality = AOMMAX(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], bit_depth); - - // Allow somewhat lower kf minq with small image formats. - if ((width * height) <= (352 * 288)) { - q_adj_factor -= 0.25; - } - - // Convert the adjustment factor to a qindex delta - // on active_best_quality. - q_val = av1_convert_qindex_to_q(active_best_quality, bit_depth); - active_best_quality += - av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, 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 && - 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(rc, q, 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; - - // Limit Q range for the adaptive loop. - if (cm->frame_type == KEY_FRAME && !rc->this_key_frame_forced && - !(cm->current_video_frame == 0)) { - int qdelta = 0; - aom_clear_system_state(); - qdelta = av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, - active_worst_quality, 2.0, bit_depth); - *top_index = active_worst_quality + qdelta; - *top_index = AOMMAX(*top_index, *bottom_index); - } - - // Special case code to try and match quality with forced key frames - if (cm->frame_type == KEY_FRAME && rc->this_key_frame_forced) { - q = rc->last_boosted_qindex; - } else { - q = av1_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality, - active_worst_quality, width, height); - 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(const RATE_CONTROL *rc, - const AV1EncoderConfig *const oxcf) { - static const double cq_adjust_threshold = 0.1; - int active_cq_level = oxcf->cq_level; - if (oxcf->rc_mode == AOM_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; -} - -static int rc_pick_q_and_bounds_one_pass_vbr(const AV1_COMP *cpi, int width, - int height, int *bottom_index, - int *top_index) { - const AV1_COMMON *const cm = &cpi->common; - const RATE_CONTROL *const rc = &cpi->rc; - const AV1EncoderConfig *const oxcf = &cpi->oxcf; - const int cq_level = get_active_cq_level(rc, oxcf); - int active_best_quality; - int active_worst_quality = calc_active_worst_quality_one_pass_vbr(cpi); - int q; - int *inter_minq; - const int bit_depth = cm->seq_params.bit_depth; - ASSIGN_MINQ_TABLE(bit_depth, inter_minq); - - if (frame_is_intra_only(cm)) { - if (oxcf->rc_mode == AOM_Q) { - const int qindex = cq_level; - const double q_val = av1_convert_qindex_to_q(qindex, bit_depth); - const int delta_qindex = - av1_compute_qdelta(rc, q_val, q_val * 0.25, bit_depth); - active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality); - } else if (rc->this_key_frame_forced) { - const int qindex = rc->last_boosted_qindex; - const double last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth); - const int delta_qindex = av1_compute_qdelta( - rc, last_boosted_q, last_boosted_q * 0.75, bit_depth); - active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality); - } else { // not first frame of one pass and kf_boost is set - double q_adj_factor = 1.0; - - active_best_quality = - get_kf_active_quality(rc, rc->avg_frame_qindex[KEY_FRAME], bit_depth); - - // Allow somewhat lower kf minq with small image formats. - if ((width * height) <= (352 * 288)) { - q_adj_factor -= 0.25; - } - - // Convert the adjustment factor to a qindex delta on active_best_quality. - { - const double q_val = - av1_convert_qindex_to_q(active_best_quality, bit_depth); - active_best_quality += - av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, 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. - q = (rc->frames_since_key > 1 && - rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality) - ? rc->avg_frame_qindex[INTER_FRAME] - : rc->avg_frame_qindex[KEY_FRAME]; - // For constrained quality dont allow Q less than the cq level - if (oxcf->rc_mode == AOM_CQ) { - if (q < cq_level) q = cq_level; - active_best_quality = get_gf_active_quality(rc, q, bit_depth); - // Constrained quality use slightly lower active best. - active_best_quality = active_best_quality * 15 / 16; - } else if (oxcf->rc_mode == AOM_Q) { - const int qindex = cq_level; - const double q_val = av1_convert_qindex_to_q(qindex, bit_depth); - const int delta_qindex = - (cpi->refresh_alt_ref_frame) - ? av1_compute_qdelta(rc, q_val, q_val * 0.40, bit_depth) - : av1_compute_qdelta(rc, q_val, q_val * 0.50, bit_depth); - active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality); - } else { - active_best_quality = get_gf_active_quality(rc, q, bit_depth); - } - } else { - if (oxcf->rc_mode == AOM_Q) { - const int qindex = cq_level; - const double q_val = av1_convert_qindex_to_q(qindex, bit_depth); - const double delta_rate[FIXED_GF_INTERVAL] = { 0.50, 1.0, 0.85, 1.0, - 0.70, 1.0, 0.85, 1.0 }; - const int delta_qindex = av1_compute_qdelta( - rc, q_val, - q_val * delta_rate[cm->current_video_frame % FIXED_GF_INTERVAL], - bit_depth); - active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality); - } else { - // Use the lower of active_worst_quality and recent/average Q. - active_best_quality = (cm->current_video_frame > 1) - ? inter_minq[rc->avg_frame_qindex[INTER_FRAME]] - : 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 == AOM_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; - - // Limit Q range for the adaptive loop. - { - int qdelta = 0; - aom_clear_system_state(); - if (cm->frame_type == KEY_FRAME && !rc->this_key_frame_forced && - !(cm->current_video_frame == 0)) { - qdelta = av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, - active_worst_quality, 2.0, bit_depth); - } else if (!rc->is_src_frame_alt_ref && - (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) { - qdelta = av1_compute_qdelta_by_rate( - &cpi->rc, cm->frame_type, active_worst_quality, 1.75, bit_depth); - } - *top_index = active_worst_quality + qdelta; - *top_index = AOMMAX(*top_index, *bottom_index); - } - - if (oxcf->rc_mode == AOM_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 = av1_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality, - active_worst_quality, width, height); - 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 av1_frame_type_qdelta(const AV1_COMP *cpi, int rf_level, int q) { - static const FRAME_TYPE frame_type[RATE_FACTOR_LEVELS] = { - INTER_FRAME, INTER_FRAME, INTER_FRAME, INTER_FRAME, INTER_FRAME, KEY_FRAME - }; - const AV1_COMMON *const cm = &cpi->common; - int qdelta = av1_compute_qdelta_by_rate(&cpi->rc, frame_type[rf_level], q, - rate_factor_deltas[rf_level], - cm->seq_params.bit_depth); - return qdelta; -} - -#define STATIC_MOTION_THRESH 95 -static int rc_pick_q_and_bounds_two_pass(const AV1_COMP *cpi, int width, - int height, int *bottom_index, - int *top_index, int *arf_q) { - const AV1_COMMON *const cm = &cpi->common; - const RATE_CONTROL *const rc = &cpi->rc; - const AV1EncoderConfig *const oxcf = &cpi->oxcf; - const GF_GROUP *gf_group = &cpi->twopass.gf_group; - const int cq_level = get_active_cq_level(rc, oxcf); - int active_best_quality; - int active_worst_quality = cpi->twopass.active_worst_quality; - int q; - int *inter_minq; - const int bit_depth = cm->seq_params.bit_depth; - ASSIGN_MINQ_TABLE(bit_depth, inter_minq); - -#if CUSTOMIZED_GF - const int is_intrl_arf_boost = - gf_group->update_type[gf_group->index] == INTNL_ARF_UPDATE; -#else - const int is_intrl_arf_boost = cpi->refresh_alt2_ref_frame; -#endif // CUSTOMIZED_GF - - if (frame_is_intra_only(cm)) { - // 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) { - double last_boosted_q; - int delta_qindex; - int qindex; - - if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) { - qindex = AOMMIN(rc->last_kf_qindex, rc->last_boosted_qindex); - active_best_quality = qindex; - last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth); - delta_qindex = av1_compute_qdelta(rc, last_boosted_q, - last_boosted_q * 1.25, bit_depth); - active_worst_quality = - AOMMIN(qindex + delta_qindex, active_worst_quality); - } else { - qindex = rc->last_boosted_qindex; - last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth); - delta_qindex = av1_compute_qdelta(rc, last_boosted_q, - last_boosted_q * 0.5, bit_depth); - active_best_quality = AOMMAX(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, bit_depth); - - // Allow somewhat lower kf minq with small image formats. - if ((width * 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 = av1_convert_qindex_to_q(active_best_quality, bit_depth); - active_best_quality += - av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, bit_depth); - } - } else if (!rc->is_src_frame_alt_ref && - (cpi->refresh_golden_frame || is_intrl_arf_boost || - 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; - } - // For constrained quality dont allow Q less than the cq level - if (oxcf->rc_mode == AOM_CQ) { - if (q < cq_level) q = cq_level; -#if USE_SYMM_MULTI_LAYER && MULTI_LVL_BOOST_VBR_CQ - if (gf_group->update_type[gf_group->index] == ARF_UPDATE || - (is_intrl_arf_boost && !cpi->new_bwdref_update_rule)) { -#endif // USE_SYMM_MULTI_LAYER && MULTI_LVL_BOOST_VBR_CQ - active_best_quality = get_gf_active_quality(rc, q, bit_depth); - - // Constrained quality use slightly lower active best. - active_best_quality = active_best_quality * 15 / 16; -#if REDUCE_LAST_ALT_BOOST - if (gf_group->update_type[gf_group->index] == ARF_UPDATE) { - const int min_boost = get_gf_high_motion_quality(q, bit_depth); - const int boost = min_boost - active_best_quality; - - active_best_quality = min_boost - (int)(boost * rc->arf_boost_factor); - } -#endif - *arf_q = active_best_quality; -#if USE_SYMM_MULTI_LAYER && MULTI_LVL_BOOST_VBR_CQ - } else { - active_best_quality = rc->arf_q; - int this_height = gf_group->pyramid_level[gf_group->index]; - while (this_height < gf_group->pyramid_height) { - active_best_quality = (active_best_quality + cq_level + 1) / 2; - ++this_height; - } - } -#endif // USE_SYMM_MULTI_LAYER && MULTI_LVL_BOOST_VBR_CQ - } else if (oxcf->rc_mode == AOM_Q) { - if (!cpi->refresh_alt_ref_frame && !is_intrl_arf_boost) { - active_best_quality = cq_level; - } else { - if (gf_group->update_type[gf_group->index] == ARF_UPDATE) { - active_best_quality = get_gf_active_quality(rc, q, bit_depth); - *arf_q = active_best_quality; -#if REDUCE_LAST_ALT_BOOST - const int min_boost = get_gf_high_motion_quality(q, bit_depth); - const int boost = min_boost - active_best_quality; - - active_best_quality = min_boost - (int)(boost * rc->arf_boost_factor); -#endif - } else { - active_best_quality = rc->arf_q; - } -#if USE_SYMM_MULTI_LAYER - if (cpi->new_bwdref_update_rule && is_intrl_arf_boost) { - int this_height = gf_group->pyramid_level[gf_group->index]; - while (this_height < gf_group->pyramid_height) { - active_best_quality = (active_best_quality + cq_level + 1) / 2; - ++this_height; - } - } else { -#endif - // Modify best quality for second level arfs. For mode AOM_Q this - // becomes the baseline frame q. - if (gf_group->rf_level[gf_group->index] == GF_ARF_LOW) - active_best_quality = (active_best_quality + cq_level + 1) / 2; -#if USE_SYMM_MULTI_LAYER - } -#endif - } - } else { - active_best_quality = get_gf_active_quality(rc, q, bit_depth); -#if REDUCE_LAST_ALT_BOOST - const int min_boost = get_gf_high_motion_quality(q, bit_depth); - const int boost = min_boost - active_best_quality; - - active_best_quality = min_boost - (int)(boost * rc->arf_boost_factor); -#endif -#if USE_SYMM_MULTI_LAYER - if (cpi->new_bwdref_update_rule && is_intrl_arf_boost) { - int this_height = gf_group->pyramid_level[gf_group->index]; - while (this_height < gf_group->pyramid_height) { - active_best_quality = - (active_best_quality + active_worst_quality + 1) / 2; - ++this_height; - } - } -#endif - } - } else { - if (oxcf->rc_mode == AOM_Q) { - active_best_quality = cq_level; - } 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 == AOM_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 ((cpi->oxcf.rc_mode != AOM_Q) && - (cpi->twopass.gf_zeromotion_pct < VLOW_MOTION_THRESHOLD)) { - if (frame_is_intra_only(cm) || - (!rc->is_src_frame_alt_ref && - (cpi->refresh_golden_frame || is_intrl_arf_boost || - cpi->refresh_alt_ref_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; - } - } - - aom_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 = av1_frame_type_qdelta(cpi, gf_group->rf_level[gf_group->index], - active_worst_quality); - active_worst_quality = - AOMMAX(active_worst_quality + qdelta, active_best_quality); - } - - // Modify active_best_quality for downscaled normal frames. - if (av1_frame_scaled(cm) && !frame_is_kf_gf_arf(cpi)) { - int qdelta = av1_compute_qdelta_by_rate( - rc, cm->frame_type, active_best_quality, 2.0, bit_depth); - active_best_quality = - AOMMAX(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 (oxcf->rc_mode == AOM_Q) { - q = active_best_quality; - // Special case code to try and match quality with forced key frames. - } else 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 = AOMMIN(rc->last_kf_qindex, rc->last_boosted_qindex); - } else { - q = AOMMIN(rc->last_boosted_qindex, - (active_best_quality + active_worst_quality) / 2); - } - } else { - q = av1_rc_regulate_q(cpi, rc->this_frame_target, active_best_quality, - active_worst_quality, width, height); - 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 av1_rc_pick_q_and_bounds(AV1_COMP *cpi, int width, int height, - int *bottom_index, int *top_index) { - int q; - if (cpi->oxcf.pass == 0) { - if (cpi->oxcf.rc_mode == AOM_CBR) - q = rc_pick_q_and_bounds_one_pass_cbr(cpi, width, height, bottom_index, - top_index); - else - q = rc_pick_q_and_bounds_one_pass_vbr(cpi, width, height, bottom_index, - top_index); - } else { - assert(cpi->oxcf.pass == 2 && "invalid encode pass"); - - GF_GROUP *gf_group = &cpi->twopass.gf_group; - int arf_q = 0; - - q = rc_pick_q_and_bounds_two_pass(cpi, width, height, bottom_index, - top_index, &arf_q); - - if (gf_group->update_type[gf_group->index] == ARF_UPDATE) { - cpi->rc.arf_q = arf_q; - } - } - - return q; -} - -void av1_rc_compute_frame_size_bounds(const AV1_COMP *cpi, int frame_target, - int *frame_under_shoot_limit, - int *frame_over_shoot_limit) { - if (cpi->oxcf.rc_mode == AOM_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 tolerance = (cpi->sf.recode_tolerance * frame_target) / 100; - *frame_under_shoot_limit = AOMMAX(frame_target - tolerance - 200, 0); - *frame_over_shoot_limit = - AOMMIN(frame_target + tolerance + 200, cpi->rc.max_frame_bandwidth); - } -} - -static void rc_set_frame_target(AV1_COMP *cpi, int target, int width, - int height) { - const AV1_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - - rc->this_frame_target = target; - - // Modify frame size target when down-scaled. - if (av1_frame_scaled(cm)) - rc->this_frame_target = - (int)(rc->this_frame_target * resize_rate_factor(cpi, width, height)); - - // Target rate per SB64 (including partial SB64s. - rc->sb64_target_rate = - (int)((int64_t)rc->this_frame_target * 64 * 64) / (width * height); -} - -static void update_alt_ref_frame_stats(AV1_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(AV1_COMP *cpi) { - RATE_CONTROL *const rc = &cpi->rc; -#if CUSTOMIZED_GF - const TWO_PASS *const twopass = &cpi->twopass; - const GF_GROUP *const gf_group = &twopass->gf_group; - const int is_intrnl_arf = - cpi->oxcf.pass == 2 - ? gf_group->update_type[gf_group->index] == INTNL_ARF_UPDATE - : cpi->refresh_alt2_ref_frame; -#else - const int is_intnl_arf = cpi->refresh_alt2_ref_frame; -#endif - - // Update the Golden frame usage counts. - // NOTE(weitinglin): If we use show_existing_frame for an OVERLAY frame, - // only the virtual indices for the reference frame will be - // updated and cpi->refresh_golden_frame will still be zero. - if (cpi->refresh_golden_frame || rc->is_src_frame_alt_ref) { - // We will not use internal overlay frames to replace the golden frame - if (!rc->is_src_frame_ext_arf) - // 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; - } - } else if (!cpi->refresh_alt_ref_frame && !is_intrnl_arf) { - rc->frames_since_golden++; - } -} - -void av1_rc_postencode_update(AV1_COMP *cpi, uint64_t bytes_used) { - const AV1_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; -#if CUSTOMIZED_GF - const TWO_PASS *const twopass = &cpi->twopass; - const GF_GROUP *const gf_group = &twopass->gf_group; - const int is_intrnl_arf = - cpi->oxcf.pass == 2 - ? gf_group->update_type[gf_group->index] == INTNL_ARF_UPDATE - : cpi->refresh_alt2_ref_frame; -#else - const int is_intrnl_arf = cpi->refresh_alt2_ref_frame; -#endif - - const int qindex = cm->base_qindex; - - if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled) { - av1_cyclic_refresh_postencode(cpi); - } - - // Update rate control heuristics - rc->projected_frame_size = (int)(bytes_used << 3); - - // Post encode loop adjustment of Q prediction. - av1_rc_update_rate_correction_factors(cpi, cm->width, cm->height); - - // Keep a record of last Q and ambient average Q. - if (cm->frame_type == KEY_FRAME) { - 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); - } else { - if (!rc->is_src_frame_alt_ref && - !(cpi->refresh_golden_frame || is_intrnl_arf || - 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 += av1_convert_qindex_to_q(qindex, cm->seq_params.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; - } - } - - // Keep record of last boosted (KF/GF/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 || is_intrnl_arf || - (cpi->refresh_golden_frame && !rc->is_src_frame_alt_ref)))) { - rc->last_boosted_qindex = qindex; - } - if (cm->frame_type == KEY_FRAME) rc->last_kf_qindex = qindex; - - update_buffer_level(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 (av1_frame_scaled(cm)) - rc->this_frame_target = - (int)(rc->this_frame_target / - resize_rate_factor(cpi, cm->width, cm->height)); - if (cm->frame_type != KEY_FRAME) { - 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; - // TODO(zoeliu): To investigate whether we should treat BWDREF_FRAME - // differently here for rc->avg_frame_bandwidth. - rc->total_target_bits += - (cm->show_frame || rc->is_bwd_ref_frame) ? rc->avg_frame_bandwidth : 0; - - rc->total_target_vs_actual = rc->total_actual_bits - rc->total_target_bits; - - if (is_altref_enabled(cpi) && cpi->refresh_alt_ref_frame && - (cm->frame_type != KEY_FRAME)) - // 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 (cm->frame_type == KEY_FRAME) rc->frames_since_key = 0; - // if (cm->current_video_frame == 1 && cm->show_frame) - /* - rc->this_frame_target = - (int)(rc->this_frame_target / resize_rate_factor(cpi, cm->width, - cm->height)); - */ -} - -void av1_rc_postencode_update_drop_frame(AV1_COMP *cpi) { - // Update buffer level with zero size, update frame counters, and return. - update_buffer_level(cpi, 0); - cpi->rc.frames_since_key++; - cpi->rc.frames_to_key--; - cpi->rc.rc_2_frame = 0; - cpi->rc.rc_1_frame = 0; -} - -// Use this macro to turn on/off use of alt-refs in one-pass mode. -#define USE_ALTREF_FOR_ONE_PASS 1 - -static int calc_pframe_target_size_one_pass_vbr(const AV1_COMP *const cpi) { - static const int af_ratio = 10; - const RATE_CONTROL *const rc = &cpi->rc; - int target; -#if USE_ALTREF_FOR_ONE_PASS - 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); -#else - target = rc->avg_frame_bandwidth; -#endif - return av1_rc_clamp_pframe_target_size(cpi, target); -} - -static int calc_iframe_target_size_one_pass_vbr(const AV1_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 av1_rc_clamp_iframe_target_size(cpi, target); -} - -void av1_rc_get_one_pass_vbr_params(AV1_COMP *cpi) { - AV1_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - int target; - int altref_enabled = is_altref_enabled(cpi); - int sframe_dist = cpi->oxcf.sframe_dist; - int sframe_mode = cpi->oxcf.sframe_mode; - int sframe_enabled = cpi->oxcf.sframe_enabled; - // TODO(yaowu): replace the "auto_key && 0" below with proper decision logic. - if (!cpi->refresh_alt_ref_frame && - (cm->current_video_frame == 0 || (cpi->frame_flags & FRAMEFLAGS_KEY) || - rc->frames_to_key == 0 || (cpi->oxcf.auto_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 (sframe_enabled) { - if (altref_enabled) { - if (sframe_mode == 1) { - // sframe_mode == 1: insert sframe if it matches altref frame. - - if (cm->current_video_frame % sframe_dist == 0 && - cm->frame_type != KEY_FRAME && cm->current_video_frame != 0 && - cpi->refresh_alt_ref_frame) { - cm->frame_type = S_FRAME; - } - } else { - // sframe_mode != 1: if sframe will be inserted at the next available - // altref frame - - if (cm->current_video_frame % sframe_dist == 0 && - cm->frame_type != KEY_FRAME && cm->current_video_frame != 0) { - rc->sframe_due = 1; - } - - if (rc->sframe_due && cpi->refresh_alt_ref_frame) { - cm->frame_type = S_FRAME; - rc->sframe_due = 0; - } - } - } else { - if (cm->current_video_frame % sframe_dist == 0 && - cm->frame_type != KEY_FRAME && cm->current_video_frame != 0) { - cm->frame_type = S_FRAME; - } - } - } - } - if (rc->frames_till_gf_update_due == 0) { - 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; - rc->constrained_gf_group = 1; - } else { - rc->constrained_gf_group = 0; - } - cpi->refresh_golden_frame = 1; - rc->source_alt_ref_pending = USE_ALTREF_FOR_ONE_PASS; - rc->gfu_boost = DEFAULT_GF_BOOST; - } - - if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ) - av1_cyclic_refresh_update_parameters(cpi); - - 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); - rc_set_frame_target(cpi, target, cm->width, cm->height); -} - -static int calc_pframe_target_size_one_pass_cbr(const AV1_COMP *cpi) { - const AV1EncoderConfig *oxcf = &cpi->oxcf; - const RATE_CONTROL *rc = &cpi->rc; - 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 = - AOMMAX(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 (diff > 0) { - // Lower the target bandwidth for this frame. - const int pct_low = (int)AOMMIN(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)AOMMIN(-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 = AOMMIN(target, max_rate); - } - return AOMMAX(min_frame_target, target); -} - -static int calc_iframe_target_size_one_pass_cbr(const AV1_COMP *cpi) { - const RATE_CONTROL *rc = &cpi->rc; - 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; - - kf_boost = AOMMAX(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 av1_rc_clamp_iframe_target_size(cpi, target); -} - -void av1_rc_get_one_pass_cbr_params(AV1_COMP *cpi) { - AV1_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - int target; - // TODO(yaowu): replace the "auto_key && 0" below with proper decision logic. - if ((cm->current_video_frame == 0 || (cpi->frame_flags & FRAMEFLAGS_KEY) || - rc->frames_to_key == 0 || (cpi->oxcf.auto_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) { - if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ) - av1_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) - av1_cyclic_refresh_update_parameters(cpi); - - if (cm->frame_type == KEY_FRAME) - target = calc_iframe_target_size_one_pass_cbr(cpi); - else - target = calc_pframe_target_size_one_pass_cbr(cpi); - - rc_set_frame_target(cpi, target, cm->width, cm->height); - // TODO(afergs): Decide whether to scale up, down, or not at all -} - -int av1_compute_qdelta(const RATE_CONTROL *rc, double qstart, double qtarget, - aom_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 (av1_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 (av1_convert_qindex_to_q(i, bit_depth) >= qtarget) break; - } - - return target_index - start_index; -} - -int av1_compute_qdelta_by_rate(const RATE_CONTROL *rc, FRAME_TYPE frame_type, - int qindex, double rate_target_ratio, - aom_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 = - av1_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 (av1_rc_bits_per_mb(frame_type, i, 1.0, bit_depth) <= - target_bits_per_mb) { - target_index = i; - break; - } - } - return target_index - qindex; -} - -void av1_rc_set_gf_interval_range(const AV1_COMP *const cpi, - RATE_CONTROL *const rc) { - const AV1EncoderConfig *const oxcf = &cpi->oxcf; - - // Special case code for 1 pass fixed Q mode tests - if ((oxcf->pass == 0) && (oxcf->rc_mode == AOM_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 = av1_rc_get_default_min_gf_interval( - oxcf->width, oxcf->height, cpi->framerate); - if (rc->max_gf_interval == 0) - rc->max_gf_interval = av1_rc_get_default_max_gf_interval( - cpi->framerate, rc->min_gf_interval); - - // Extended interval for genuinely static scenes - rc->static_scene_max_gf_interval = MAX_LAG_BUFFERS * 2; - - if (is_altref_enabled(cpi)) { - if (rc->static_scene_max_gf_interval > oxcf->lag_in_frames - 1) - rc->static_scene_max_gf_interval = oxcf->lag_in_frames - 1; - } - - 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 = AOMMIN(rc->min_gf_interval, rc->max_gf_interval); - } -} - -void av1_rc_update_framerate(AV1_COMP *cpi, int width, int height) { - const AV1EncoderConfig *const oxcf = &cpi->oxcf; - RATE_CONTROL *const rc = &cpi->rc; - int vbr_max_bits; - const int MBs = av1_get_MBs(width, height); - - 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 = - AOMMAX(rc->min_frame_bandwidth, FRAME_OVERHEAD_BITS); - - // A maximum bitrate for a frame is defined. - // The baseline for this aligns with HW implementations that - // can support decode of 1080P content up to a bitrate of MAX_MB_RATE bits - // per 16x16 MB (averaged over a frame). 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. - vbr_max_bits = - (int)(((int64_t)rc->avg_frame_bandwidth * oxcf->two_pass_vbrmax_section) / - 100); - rc->max_frame_bandwidth = - AOMMAX(AOMMAX((MBs * MAX_MB_RATE), MAXRATE_1080P), vbr_max_bits); - - av1_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(AV1_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; - double position_factor = 1.0; - - // How far through the clip are we. - // This number is used to damp the per frame rate correction. - // Range 0 - 1.0 - if (cpi->twopass.total_stats.count != 0.) { - position_factor = sqrt((double)cpi->common.current_video_frame / - cpi->twopass.total_stats.count); - } - max_delta = (int)(position_factor * - ((*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 = AOMMAX(rc->avg_frame_bandwidth, *this_frame_target); - int fast_extra_bits; - fast_extra_bits = (int)AOMMIN(rc->vbr_bits_off_target_fast, one_frame_bits); - fast_extra_bits = (int)AOMMIN( - fast_extra_bits, - AOMMAX(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 av1_set_target_rate(AV1_COMP *cpi, int width, int height) { - RATE_CONTROL *const rc = &cpi->rc; - int target_rate = rc->base_frame_target; - - // Correction to rate target based on prior over or under shoot. - if (cpi->oxcf.rc_mode == AOM_VBR || cpi->oxcf.rc_mode == AOM_CQ) - vbr_rate_correction(cpi, &target_rate); - rc_set_frame_target(cpi, target_rate, width, height); -} |