| /* |
| * Copyright (c) 2021, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 3-Clause Clear License |
| * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear |
| * License was not distributed with this source code in the LICENSE file, you |
| * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. 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 |
| * aomedia.org/license/patent-license/. |
| */ |
| |
| #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/encode_strategy.h" |
| #include "av1/encoder/gop_structure.h" |
| #include "av1/encoder/random.h" |
| #include "av1/encoder/ratectrl.h" |
| |
| #define USE_UNRESTRICTED_Q_IN_CQ_MODE 0 |
| |
| // 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 MIN_BPB_FACTOR 0.005 |
| #define MAX_BPB_FACTOR 50 |
| |
| #define SUPERRES_QADJ_PER_DENOM_KEYFRAME_SOLO 0 |
| #define SUPERRES_QADJ_PER_DENOM_KEYFRAME 2 |
| #define SUPERRES_QADJ_PER_DENOM_ARFFRAME 0 |
| |
| #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 arfgf_ld_low_motion_minq_8[QINDEX_RANGE]; |
| static int arfgf_ld_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 arfgf_ld_low_motion_minq_10[QINDEX_RANGE]; |
| static int arfgf_ld_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 arfgf_ld_low_motion_minq_12[QINDEX_RANGE]; |
| static int arfgf_ld_high_motion_minq_12[QINDEX_RANGE]; |
| static int inter_minq_12[QINDEX_RANGE]; |
| static int rtc_minq_12[QINDEX_RANGE]; |
| |
| static int gf_high = 2400; |
| static int gf_low = 300; |
| #ifdef STRICT_RC |
| static int kf_high = 3200; |
| #else |
| static int kf_high = 5000; |
| #endif |
| 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 FrameDimensionCfg *const frm_dim_cfg, |
| int width, int height) { |
| return (double)(frm_dim_cfg->width * frm_dim_cfg->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) { |
| const double minqtarget = AOMMIN(((x3 * maxq + x2) * maxq + x1) * maxq, maxq); |
| |
| // Special case handling to deal with lossless mode |
| if (minqtarget <= 1.0) return 0; |
| |
| return av1_find_qindex(minqtarget, bit_depth, 0, |
| bit_depth == AOM_BITS_8 ? QINDEX_RANGE_8_BITS - 1 |
| : bit_depth == AOM_BITS_10 ? QINDEX_RANGE_10_BITS - 1 |
| : QINDEX_RANGE - 1); |
| } |
| |
| static void init_minq_luts(int *kf_low_m, int *kf_high_m, int *arfgf_low, |
| int *arfgf_high, int *arfgf_ld_low, |
| int *arfgf_ld_high, int *inter, int *rtc, |
| aom_bit_depth_t bit_depth) { |
| int i; |
| |
| for (i = 0; i < (bit_depth == AOM_BITS_8 ? QINDEX_RANGE_8_BITS |
| : bit_depth == AOM_BITS_10 ? QINDEX_RANGE_10_BITS |
| : QINDEX_RANGE); |
| i++) { |
| const double maxq = av1_convert_qindex_to_q(i, bit_depth); |
| kf_low_m[i] = |
| get_minq_index(maxq, 0.000001 * 4, -0.0004 * 2, 0.15, bit_depth); |
| kf_high_m[i] = |
| get_minq_index(maxq, 0.0000021 * 4, -0.00125 * 2, 0.45, bit_depth); |
| arfgf_low[i] = |
| get_minq_index(maxq, 0.0000015 * 4, -0.0009 * 2, 0.30, bit_depth); |
| arfgf_high[i] = |
| get_minq_index(maxq, 0.0000021 * 4, -0.00125 * 2, 0.55, bit_depth); |
| arfgf_ld_low[i] = |
| get_minq_index(maxq, 0.0000015 * 4, -0.0009 * 2, 0.35, bit_depth); |
| arfgf_ld_high[i] = |
| get_minq_index(maxq, 0.0000021 * 4, -0.00125 * 2, 0.65, bit_depth); |
| inter[i] = |
| get_minq_index(maxq, 0.00000271 * 4, -0.00113 * 2, 0.90, bit_depth); |
| rtc[i] = |
| get_minq_index(maxq, 0.00000271 * 4, -0.00113 * 2, 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, |
| arfgf_ld_low_motion_minq_8, arfgf_ld_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, |
| arfgf_ld_low_motion_minq_10, arfgf_ld_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, |
| arfgf_ld_low_motion_minq_12, arfgf_ld_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) { |
| // Please ensure restoration.c:get_qstep() is in sync with changes here. |
| // Convert the index to a real Q value normalized for unitary transforms. |
| switch (bit_depth) { |
| case AOM_BITS_8: |
| return av1_ac_quant_QTX(qindex, 0, bit_depth) / |
| (8.0 * (1 << QUANT_TABLE_BITS)); |
| case AOM_BITS_10: |
| return av1_ac_quant_QTX(qindex, 0, bit_depth) / |
| (32.0 * (1 << QUANT_TABLE_BITS)); |
| case AOM_BITS_12: |
| return av1_ac_quant_QTX(qindex, 0, bit_depth) / |
| (128.0 * (1 << QUANT_TABLE_BITS)); |
| |
| 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 int is_screen_content_type) { |
| const double q = av1_convert_qindex_to_q(qindex, bit_depth); |
| int enumerator = frame_type == KEY_FRAME ? 1000000 : 750000; |
| if (is_screen_content_type) { |
| enumerator = frame_type == KEY_FRAME ? 500000 : 375000; |
| } |
| |
| assert(correction_factor <= MAX_BPB_FACTOR && |
| correction_factor >= MIN_BPB_FACTOR); |
| |
| // q based adjustment to baseline enumerator |
| 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 is_screen_content_type) { |
| const int bpm = (int)(av1_rc_bits_per_mb(frame_type, q, correction_factor, |
| bit_depth, is_screen_content_type)); |
| 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, |
| FRAME_UPDATE_TYPE frame_update_type) { |
| 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 (frame_update_type == OVERLAY_UPDATE || |
| frame_update_type == KFFLT_OVERLAY_UPDATE || |
| frame_update_type == INTNL_OVERLAY_UPDATE) { |
| // 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_cfg.max_inter_bitrate_pct) { |
| const int max_rate = |
| rc->avg_frame_bandwidth * oxcf->rc_cfg.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 RateControlCfg *const rc_cfg = &cpi->oxcf.rc_cfg; |
| if (rc_cfg->max_intra_bitrate_pct) { |
| const int max_rate = |
| rc->avg_frame_bandwidth * rc_cfg->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. |
| if (!cm->show_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 |
| interval = AOMMAX(MAX_GF_INTERVAL, interval); |
| return AOMMAX(interval, min_gf_interval); |
| } |
| |
| void av1_rc_init(const AV1EncoderConfig *oxcf, int pass, RATE_CONTROL *rc) { |
| const RateControlCfg *const rc_cfg = &oxcf->rc_cfg; |
| int i; |
| |
| if (pass == 0 && rc_cfg->mode == AOM_CBR) { |
| rc->avg_frame_qindex[KEY_FRAME] = rc_cfg->worst_allowed_q; |
| rc->avg_frame_qindex[INTER_FRAME] = rc_cfg->worst_allowed_q; |
| } else { |
| rc->avg_frame_qindex[KEY_FRAME] = |
| (rc_cfg->worst_allowed_q + rc_cfg->best_allowed_q) / 2; |
| rc->avg_frame_qindex[INTER_FRAME] = |
| (rc_cfg->worst_allowed_q + rc_cfg->best_allowed_q) / 2; |
| } |
| |
| rc->last_q[KEY_FRAME] = rc_cfg->best_allowed_q; |
| rc->last_q[INTER_FRAME] = rc_cfg->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->frames_till_gf_update_due = 0; |
| rc->ni_av_qi = rc_cfg->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(rc_cfg->worst_allowed_q, |
| oxcf->tool_cfg.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->gf_cfg.min_gf_interval; |
| rc->max_gf_interval = oxcf->gf_cfg.max_gf_interval; |
| if (rc->min_gf_interval == 0) |
| rc->min_gf_interval = av1_rc_get_default_min_gf_interval( |
| oxcf->frm_dim_cfg.width, oxcf->frm_dim_cfg.height, |
| oxcf->input_cfg.init_framerate); |
| if (rc->max_gf_interval == 0) |
| rc->max_gf_interval = av1_rc_get_default_max_gf_interval( |
| oxcf->input_cfg.init_framerate, rc->min_gf_interval); |
| rc->baseline_gf_interval = (rc->min_gf_interval + rc->max_gf_interval) / 2; |
| rc->avg_frame_low_motion = 0; |
| |
| rc->resize_state = ORIG; |
| rc->resize_avg_qp = 0; |
| rc->resize_buffer_underflow = 0; |
| rc->resize_count = 0; |
| } |
| |
| int av1_rc_drop_frame(AV1_COMP *cpi) { |
| const AV1EncoderConfig *oxcf = &cpi->oxcf; |
| RATE_CONTROL *const rc = &cpi->rc; |
| |
| if (!oxcf->rc_cfg.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->rc_cfg.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 int adjust_q_cbr(const AV1_COMP *cpi, int q, int active_worst_quality) { |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const AV1_COMMON *const cm = &cpi->common; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| const int max_delta = 16; |
| const int change_avg_frame_bandwidth = |
| abs(rc->avg_frame_bandwidth - rc->prev_avg_frame_bandwidth) > |
| 0.1 * (rc->avg_frame_bandwidth); |
| // If resolution changes or avg_frame_bandwidth significantly changed, |
| // then set this flag to indicate change in target bits per macroblock. |
| const int change_target_bits_mb = |
| cm->prev_frame && |
| (cm->width != cm->prev_frame->width || |
| cm->height != cm->prev_frame->height || change_avg_frame_bandwidth); |
| // Apply some control/clamp to QP under certain conditions. |
| if (cm->current_frame.frame_type != KEY_FRAME && rc->frames_since_key > 1 && |
| !change_target_bits_mb && |
| (!cpi->oxcf.rc_cfg.gf_cbr_boost_pct || (level > 1))) { |
| // Make sure q is between oscillating Qs to prevent resonance. |
| if (rc->rc_1_frame * rc->rc_2_frame == -1 && |
| rc->q_1_frame != rc->q_2_frame) { |
| q = clamp(q, AOMMIN(rc->q_1_frame, rc->q_2_frame), |
| AOMMAX(rc->q_1_frame, rc->q_2_frame)); |
| } |
| // Limit the decrease in Q from previous frame. |
| if (rc->q_1_frame - q > max_delta) q = rc->q_1_frame - max_delta; |
| } |
| // For single spatial layer: if resolution has increased push q closer |
| // to the active_worst to avoid excess overshoot. |
| if (cm->prev_frame && (cm->width * cm->height > |
| 1.5 * cm->prev_frame->width * cm->prev_frame->height)) |
| q = (q + active_worst_quality) >> 1; |
| return AOMMAX(AOMMIN(q, cpi->rc.worst_quality), cpi->rc.best_quality); |
| } |
| |
| static const RATE_FACTOR_LEVEL rate_factor_levels[FRAME_UPDATE_TYPES] = { |
| KF_STD, // KF_UPDATE |
| INTER_NORMAL, // LF_UPDATE |
| GF_ARF_STD, // GF_UPDATE |
| GF_ARF_STD, // ARF_UPDATE |
| INTER_NORMAL, // OVERLAY_UPDATE |
| INTER_NORMAL, // INTNL_OVERLAY_UPDATE |
| GF_ARF_LOW, // INTNL_ARF_UPDATE |
| GF_ARF_STD, // KFFLT_UPDATE |
| INTER_NORMAL, // KFFLT_OVERLAY_UPDATE |
| }; |
| |
| static RATE_FACTOR_LEVEL get_rate_factor_level(const GF_GROUP *const gf_group) { |
| const FRAME_UPDATE_TYPE update_type = gf_group->update_type[gf_group->index]; |
| assert(update_type < FRAME_UPDATE_TYPES); |
| return rate_factor_levels[update_type]; |
| } |
| |
| /*!\brief Gets a rate vs Q correction factor |
| * |
| * This function returns the current value of a correction factor used to |
| * dynamilcally adjust the relationship between Q and the expected number |
| * of bits for the frame. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder instance structure |
| * \param[in] width Frame width |
| * \param[in] height Frame height |
| * |
| * \return Returns a correction factor for the current frame |
| */ |
| static double get_rate_correction_factor(const AV1_COMP *cpi, int width, |
| int height) { |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| double rcf; |
| |
| if (cpi->common.current_frame.frame_type == KEY_FRAME) { |
| rcf = rc->rate_correction_factors[KF_STD]; |
| } else if (is_stat_consumption_stage(cpi)) { |
| const RATE_FACTOR_LEVEL rf_lvl = get_rate_factor_level(&cpi->gf_group); |
| rcf = rc->rate_correction_factors[rf_lvl]; |
| } else { |
| if (level <= 1 && (cpi->oxcf.rc_cfg.mode != AOM_CBR || |
| cpi->oxcf.rc_cfg.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->oxcf.frm_dim_cfg, width, height); |
| return fclamp(rcf, MIN_BPB_FACTOR, MAX_BPB_FACTOR); |
| } |
| |
| /*!\brief Sets a rate vs Q correction factor |
| * |
| * This function updates the current value of a correction factor used to |
| * dynamilcally adjust the relationship between Q and the expected number |
| * of bits for the frame. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder instance structure |
| * \param[in] factor New correction factor |
| * \param[in] width Frame width |
| * \param[in] height Frame height |
| * |
| * No return value but updates the rate correction factor for the |
| * current frame type in cpi->rc. |
| */ |
| static void set_rate_correction_factor(AV1_COMP *cpi, double factor, int width, |
| int height) { |
| RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| |
| // Normalize RCF to account for the size-dependent scaling factor. |
| factor /= resize_rate_factor(&cpi->oxcf.frm_dim_cfg, width, height); |
| |
| factor = fclamp(factor, MIN_BPB_FACTOR, MAX_BPB_FACTOR); |
| |
| if (cpi->common.current_frame.frame_type == KEY_FRAME) { |
| rc->rate_correction_factors[KF_STD] = factor; |
| } else if (is_stat_consumption_stage(cpi)) { |
| const RATE_FACTOR_LEVEL rf_lvl = get_rate_factor_level(&cpi->gf_group); |
| rc->rate_correction_factors[rf_lvl] = factor; |
| } else { |
| if (level <= 1 && (cpi->oxcf.rc_cfg.mode != AOM_CBR || |
| cpi->oxcf.rc_cfg.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.q_cfg.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( |
| cm->current_frame.frame_type, cm->quant_params.base_qindex, MBs, |
| rate_correction_factor, cm->seq_params.bit_depth, |
| cpi->is_screen_content_type); |
| } |
| // 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->quant_params.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); |
| } |
| |
| // Calculate rate for the given 'q'. |
| static int get_bits_per_mb(const AV1_COMP *cpi, int use_cyclic_refresh, |
| double correction_factor, int q) { |
| const AV1_COMMON *const cm = &cpi->common; |
| return use_cyclic_refresh |
| ? av1_cyclic_refresh_rc_bits_per_mb(cpi, q, correction_factor) |
| : av1_rc_bits_per_mb(cm->current_frame.frame_type, q, |
| correction_factor, cm->seq_params.bit_depth, |
| cpi->is_screen_content_type); |
| } |
| |
| /*!\brief Searches for a Q index value predicted to give an average macro |
| * block rate closest to the target value. |
| * |
| * Similar to find_qindex_by_rate() function, but returns a q index with a |
| * rate just above or below the desired rate, depending on which of the two |
| * rates is closer to the desired rate. |
| * Also, respects the selected aq_mode when computing the rate. |
| * |
| * \ingroup rate_control |
| * \param[in] desired_bits_per_mb Target bits per mb |
| * \param[in] cpi Top level encoder instance structure |
| * \param[in] correction_factor Current Q to rate correction factor |
| * \param[in] best_qindex Min allowed Q value. |
| * \param[in] worst_qindex Max allowed Q value. |
| * |
| * \return Returns a correction factor for the current frame |
| */ |
| static int find_closest_qindex_by_rate(int desired_bits_per_mb, |
| const AV1_COMP *cpi, |
| double correction_factor, |
| int best_qindex, int worst_qindex) { |
| const int use_cyclic_refresh = cpi->oxcf.q_cfg.aq_mode == CYCLIC_REFRESH_AQ && |
| cpi->cyclic_refresh->apply_cyclic_refresh; |
| |
| // Find 'qindex' based on 'desired_bits_per_mb'. |
| assert(best_qindex <= worst_qindex); |
| int low = best_qindex; |
| int high = worst_qindex; |
| while (low < high) { |
| const int mid = (low + high) >> 1; |
| const int mid_bits_per_mb = |
| get_bits_per_mb(cpi, use_cyclic_refresh, correction_factor, mid); |
| if (mid_bits_per_mb > desired_bits_per_mb) { |
| low = mid + 1; |
| } else { |
| high = mid; |
| } |
| } |
| assert(low == high); |
| |
| // Calculate rate difference of this q index from the desired rate. |
| const int curr_q = low; |
| const int curr_bits_per_mb = |
| get_bits_per_mb(cpi, use_cyclic_refresh, correction_factor, curr_q); |
| const int curr_bit_diff = (curr_bits_per_mb <= desired_bits_per_mb) |
| ? desired_bits_per_mb - curr_bits_per_mb |
| : INT_MAX; |
| assert((curr_bit_diff != INT_MAX && curr_bit_diff >= 0) || |
| curr_q == worst_qindex); |
| |
| // Calculate rate difference for previous q index too. |
| const int prev_q = curr_q - 1; |
| int prev_bit_diff; |
| if (curr_bit_diff == INT_MAX || curr_q == best_qindex) { |
| prev_bit_diff = INT_MAX; |
| } else { |
| const int prev_bits_per_mb = |
| get_bits_per_mb(cpi, use_cyclic_refresh, correction_factor, prev_q); |
| assert(prev_bits_per_mb > desired_bits_per_mb); |
| prev_bit_diff = prev_bits_per_mb - desired_bits_per_mb; |
| } |
| |
| // Pick one of the two q indices, depending on which one has rate closer to |
| // the desired rate. |
| return (curr_bit_diff <= prev_bit_diff) ? curr_q : prev_q; |
| } |
| |
| 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 int MBs = av1_get_MBs(width, height); |
| const double correction_factor = |
| get_rate_correction_factor(cpi, width, height); |
| const int target_bits_per_mb = |
| (int)(((uint64_t)target_bits_per_frame << BPER_MB_NORMBITS) / MBs); |
| |
| int q = |
| find_closest_qindex_by_rate(target_bits_per_mb, cpi, correction_factor, |
| active_best_quality, active_worst_quality); |
| if (cpi->oxcf.rc_cfg.mode == AOM_CBR && has_no_stats_stage(cpi)) |
| return adjust_q_cbr(cpi, q, active_worst_quality); |
| |
| 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, |
| int is_lowdelay, aom_bit_depth_t bit_depth) { |
| if (is_lowdelay) { |
| int *arfgf_ld_low_motion_minq; |
| int *arfgf_ld_high_motion_minq; |
| ASSIGN_MINQ_TABLE(bit_depth, arfgf_ld_low_motion_minq); |
| ASSIGN_MINQ_TABLE(bit_depth, arfgf_ld_high_motion_minq); |
| return get_active_quality(q, rc->gfu_boost, gf_low, gf_high, |
| arfgf_ld_low_motion_minq, |
| arfgf_ld_high_motion_minq); |
| } else { |
| 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); |
| } |
| } |
| |
| static int get_gf_high_motion_quality(int q, int is_lowdelay, |
| aom_bit_depth_t bit_depth) { |
| if (is_lowdelay) { |
| int *arfgf_ld_high_motion_minq; |
| ASSIGN_MINQ_TABLE(bit_depth, arfgf_ld_high_motion_minq); |
| return arfgf_ld_high_motion_minq[q]; |
| } else { |
| int *arfgf_high_motion_minq; |
| ASSIGN_MINQ_TABLE(bit_depth, arfgf_high_motion_minq); |
| return arfgf_high_motion_minq[q]; |
| } |
| } |
| |
| static int calc_active_worst_quality_no_stats_vbr(const AV1_COMP *cpi) { |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| const unsigned int curr_frame = cpi->common.current_frame.frame_number; |
| int active_worst_quality; |
| |
| if (cpi->common.current_frame.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 && level <= 1) { |
| 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_no_stats_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->current_frame.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_frame.frame_number < 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; |
| } |
| |
| // Calculate the active_best_quality level. |
| static int calc_active_best_quality_no_stats_cbr(const AV1_COMP *cpi, |
| int active_worst_quality, |
| int width, int height) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| const CurrentFrame *const current_frame = &cm->current_frame; |
| int *rtc_minq; |
| const int bit_depth = cm->seq_params.bit_depth; |
| int active_best_quality = rc->best_quality; |
| ASSIGN_MINQ_TABLE(bit_depth, rtc_minq); |
| |
| 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) { |
| 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 (current_frame->frame_number > 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->oxcf.rc_cfg.gf_cbr_boost_pct && |
| level <= 1) { |
| // 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. |
| int q = active_worst_quality; |
| if (rc->frames_since_key > 1 && |
| rc->avg_frame_qindex[INTER_FRAME] < active_worst_quality) { |
| q = rc->avg_frame_qindex[INTER_FRAME]; |
| } |
| active_best_quality = get_gf_active_quality( |
| rc, q, cpi->oxcf.gf_cfg.lag_in_frames == 0, bit_depth); |
| } else { |
| // Use the lower of active_worst_quality and recent/average Q. |
| FRAME_TYPE frame_type = |
| (current_frame->frame_number > 1) ? INTER_FRAME : KEY_FRAME; |
| if (rc->avg_frame_qindex[frame_type] < active_worst_quality) |
| active_best_quality = rtc_minq[rc->avg_frame_qindex[frame_type]]; |
| else |
| active_best_quality = rtc_minq[active_worst_quality]; |
| } |
| return active_best_quality; |
| } |
| |
| /*!\brief Picks q and q bounds given CBR rate control parameters in \c cpi->rc. |
| * |
| * Handles the special case when using: |
| * - Constant bit-rate mode: \c cpi->oxcf.rc_cfg.mode == \ref AOM_CBR, and |
| * - 1-pass encoding without LAP (look-ahead processing), so 1st pass stats are |
| * NOT available. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder structure |
| * \param[in] width Coded frame width |
| * \param[in] height Coded frame height |
| * \param[out] bottom_index Bottom bound for q index (best quality) |
| * \param[out] top_index Top bound for q index (worst quality) |
| * \return Returns selected q index to be used for encoding this frame. |
| */ |
| static int rc_pick_q_and_bounds_no_stats_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; |
| const CurrentFrame *const current_frame = &cm->current_frame; |
| int q; |
| const int bit_depth = cm->seq_params.bit_depth; |
| int active_worst_quality = calc_active_worst_quality_no_stats_cbr(cpi); |
| int active_best_quality = calc_active_best_quality_no_stats_cbr( |
| cpi, active_worst_quality, width, height); |
| assert(has_no_stats_stage(cpi)); |
| assert(cpi->oxcf.rc_cfg.mode == AOM_CBR); |
| |
| // 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 (current_frame->frame_type == KEY_FRAME && !rc->this_key_frame_forced && |
| current_frame->frame_number != 0) { |
| int qdelta = 0; |
| aom_clear_system_state(); |
| qdelta = av1_compute_qdelta_by_rate(&cpi->rc, current_frame->frame_type, |
| active_worst_quality, 2.0, |
| cpi->is_screen_content_type, 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 (current_frame->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 gf_group_pyramid_level(const GF_GROUP *gf_group, int gf_index) { |
| return gf_group->layer_depth[gf_index]; |
| } |
| |
| static int get_active_qp(const RATE_CONTROL *rc, |
| const AV1EncoderConfig *const oxcf, int intra_only, |
| aom_superres_mode superres_mode, int superres_denom) { |
| const RateControlCfg *const rc_cfg = &oxcf->rc_cfg; |
| static const double cq_adjust_threshold = 0.1; |
| int active_qp = rc_cfg->qp; |
| (void)intra_only; |
| if (rc_cfg->mode == AOM_CQ || rc_cfg->mode == AOM_Q) { |
| // printf("Superres %d %d %d = %d\n", superres_denom, intra_only, |
| // rc->frames_to_key, !(intra_only && rc->frames_to_key <= 1)); |
| if ((superres_mode == AOM_SUPERRES_QTHRESH || |
| superres_mode == AOM_SUPERRES_AUTO) && |
| superres_denom != SCALE_NUMERATOR) { |
| int mult = SUPERRES_QADJ_PER_DENOM_KEYFRAME_SOLO; |
| if (intra_only && rc->frames_to_key <= 1) { |
| mult = 0; |
| } else if (intra_only) { |
| mult = SUPERRES_QADJ_PER_DENOM_KEYFRAME; |
| } else { |
| mult = SUPERRES_QADJ_PER_DENOM_ARFFRAME; |
| } |
| active_qp = |
| AOMMAX(active_qp - ((superres_denom - SCALE_NUMERATOR) * mult), 0); |
| } |
| } |
| if (rc_cfg->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_qp = (int)(active_qp * x / cq_adjust_threshold); |
| } |
| } |
| return active_qp; |
| } |
| |
| /*! \brief Pick q index for this frame using fixed q index offsets. |
| * |
| * The q index offsets are fixed in the sense that they are independent of the |
| * video content. The offsets for each pyramid level are taken from |
| * \c oxcf->q_cfg.fixed_qp_offsets array. |
| * |
| * \ingroup rate_control |
| * \param[in] oxcf Top level encoder configuration |
| * \param[in] rc Top level rate control structure |
| * \param[in] gf_group Configuration of current golden frame group |
| * \param[in] gf_index Index of this frame in the golden frame group |
| * \param[in] qp Upper bound for q index (this may be same as |
| * \c oxcf->qp, or slightly modified for some |
| * special cases) |
| * \param[in] bit_depth Bit depth of the codec (same as |
| * \c cm->seq_params.bit_depth) |
| * \return Returns selected q index to be used for encoding this frame. |
| */ |
| static int get_q_using_fixed_offsets(const AV1EncoderConfig *const oxcf, |
| const RATE_CONTROL *const rc, |
| const GF_GROUP *const gf_group, |
| int gf_index, int qp, int bit_depth) { |
| assert(oxcf->q_cfg.use_fixed_qp_offsets == 1 || |
| oxcf->q_cfg.use_fixed_qp_offsets == 2); |
| assert(oxcf->rc_cfg.mode == AOM_Q); |
| const FRAME_UPDATE_TYPE update_type = gf_group->update_type[gf_index]; |
| |
| int offset_idx = -1; |
| if (update_type == KF_UPDATE) { |
| if (rc->frames_to_key <= 1) { |
| // Image / intra-only coding: ignore offsets. |
| return qp; |
| } |
| offset_idx = 0; |
| } else if (update_type == ARF_UPDATE || update_type == GF_UPDATE || |
| update_type == INTNL_ARF_UPDATE || update_type == LF_UPDATE || |
| update_type == KFFLT_UPDATE) { |
| if (gf_group->layer_depth[gf_index] >= |
| oxcf->gf_cfg.gf_max_pyr_height + 1) { // Leaf. |
| return qp; // Directly Return worst quality allowed. |
| } |
| offset_idx = |
| AOMMIN(gf_group->layer_depth[gf_index], oxcf->gf_cfg.gf_max_pyr_height); |
| } else { // Overlay frame. |
| assert(update_type == OVERLAY_UPDATE || |
| update_type == KFFLT_OVERLAY_UPDATE || |
| update_type == INTNL_OVERLAY_UPDATE); |
| return qp; // Directly Return worst quality allowed. |
| } |
| assert(offset_idx >= 0 && offset_idx < FIXED_QP_OFFSET_COUNT); |
| assert(oxcf->q_cfg.fixed_qp_offsets[offset_idx] >= 0); |
| |
| // Get qindex offset, by first converting to 'q' and then back. |
| const double q_val_orig = av1_convert_qindex_to_q(qp, bit_depth); |
| const double q_val_target = |
| AOMMAX(q_val_orig - oxcf->q_cfg.fixed_qp_offsets[offset_idx], 0.0); |
| const int delta_qindex = |
| av1_compute_qdelta(rc, q_val_orig, q_val_target, bit_depth); |
| return AOMMAX(qp + delta_qindex, 0); |
| } |
| |
| /*!\brief Picks q and q bounds given non-CBR rate control params in \c cpi->rc. |
| * |
| * Handles the special case when using: |
| * - Any rate control other than constant bit-rate mode: |
| * \c cpi->oxcf.rc_cfg.mode != \ref AOM_CBR, and |
| * - 1-pass encoding without LAP (look-ahead processing), so 1st pass stats are |
| * NOT available. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder structure |
| * \param[in] width Coded frame width |
| * \param[in] height Coded frame height |
| * \param[in] gf_index Index of this frame in the golden frame group |
| * \param[out] bottom_index Bottom bound for q index (best quality) |
| * \param[out] top_index Top bound for q index (worst quality) |
| * \return Returns selected q index to be used for encoding this frame. |
| */ |
| static int rc_pick_q_and_bounds_no_stats(const AV1_COMP *cpi, int width, |
| int height, int gf_index, |
| int *bottom_index, int *top_index) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const CurrentFrame *const current_frame = &cm->current_frame; |
| const AV1EncoderConfig *const oxcf = &cpi->oxcf; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| const enum aom_rc_mode rc_mode = oxcf->rc_cfg.mode; |
| |
| assert(has_no_stats_stage(cpi)); |
| assert(rc_mode == AOM_VBR || |
| (!USE_UNRESTRICTED_Q_IN_CQ_MODE && rc_mode == AOM_CQ) || |
| rc_mode == AOM_Q); |
| assert(IMPLIES(rc_mode == AOM_Q, |
| gf_group->update_type[gf_index] == ARF_UPDATE || |
| gf_group->update_type[gf_index] == KFFLT_UPDATE)); |
| |
| const int qp = |
| get_active_qp(rc, oxcf, frame_is_intra_only(cm), cpi->superres_mode, |
| cm->superres_scale_denominator); |
| const int bit_depth = cm->seq_params.bit_depth; |
| |
| if (oxcf->q_cfg.use_fixed_qp_offsets) { |
| return get_q_using_fixed_offsets(oxcf, rc, gf_group, gf_index, qp, |
| bit_depth); |
| } |
| |
| int active_best_quality; |
| int active_worst_quality = calc_active_worst_quality_no_stats_vbr(cpi); |
| int q; |
| int *inter_minq; |
| ASSIGN_MINQ_TABLE(bit_depth, inter_minq); |
| |
| if (frame_is_intra_only(cm)) { |
| if (rc_mode == AOM_Q) { |
| const int qindex = qp; |
| 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 && level <= 1) { |
| // 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 (rc_mode == AOM_CQ) { |
| if (q < qp) q = qp; |
| active_best_quality = get_gf_active_quality( |
| rc, q, cpi->oxcf.gf_cfg.lag_in_frames == 0, bit_depth); |
| // Constrained quality use slightly lower active best. |
| active_best_quality = active_best_quality * 15 / 16; |
| } else if (rc_mode == AOM_Q) { |
| const int qindex = qp; |
| const double q_val = av1_convert_qindex_to_q(qindex, bit_depth); |
| const int delta_qindex = |
| (level <= 1) ? 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, cpi->oxcf.gf_cfg.lag_in_frames == 0, bit_depth); |
| } |
| } else { |
| assert(rc_mode != AOM_Q); |
| // Use the lower of active_worst_quality and recent/average Q. |
| active_best_quality = (current_frame->frame_number > 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 ((rc_mode == AOM_CQ) && (active_best_quality < qp)) { |
| active_best_quality = qp; |
| } |
| } |
| |
| // 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 (current_frame->frame_type == KEY_FRAME && !rc->this_key_frame_forced && |
| current_frame->frame_number != 0) { |
| qdelta = av1_compute_qdelta_by_rate( |
| &cpi->rc, current_frame->frame_type, active_worst_quality, 2.0, |
| cpi->is_screen_content_type, bit_depth); |
| } else if (!rc->is_src_frame_alt_ref && (level <= 1)) { |
| qdelta = av1_compute_qdelta_by_rate( |
| &cpi->rc, current_frame->frame_type, active_worst_quality, 1.75, |
| cpi->is_screen_content_type, bit_depth); |
| } |
| *top_index = active_worst_quality + qdelta; |
| *top_index = AOMMAX(*top_index, *bottom_index); |
| } |
| |
| if (rc_mode == AOM_Q) { |
| q = active_best_quality; |
| // Special case code to try and match quality with forced key frames |
| } else if ((current_frame->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 const double rate_factor_deltas[RATE_FACTOR_LEVELS] = { |
| 1.00, // INTER_NORMAL |
| 1.50, // GF_ARF_LOW |
| 2.00, // GF_ARF_STD |
| 2.00, // KF_STD |
| }; |
| |
| int av1_frame_type_qdelta(const AV1_COMP *cpi, int q) { |
| const RATE_FACTOR_LEVEL rf_lvl = get_rate_factor_level(&cpi->gf_group); |
| const FRAME_TYPE frame_type = (rf_lvl == KF_STD) ? KEY_FRAME : INTER_FRAME; |
| double rate_factor; |
| |
| rate_factor = rate_factor_deltas[rf_lvl]; |
| return av1_compute_qdelta_by_rate(&cpi->rc, frame_type, q, rate_factor, |
| cpi->is_screen_content_type, |
| cpi->common.seq_params.bit_depth); |
| } |
| |
| // This unrestricted Q selection on CQ mode is useful when testing new features, |
| // but may lead to Q being out of range on current RC restrictions |
| #if USE_UNRESTRICTED_Q_IN_CQ_MODE |
| static int rc_pick_q_and_bounds_no_stats_cq(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 qp = |
| get_active_qp(rc, oxcf, frame_is_intra_only(cm), cpi->superres_mode, |
| cm->superres_scale_denominator); |
| const int bit_depth = cm->seq_params.bit_depth; |
| const int q = (int)av1_convert_qindex_to_q(qp, bit_depth); |
| (void)width; |
| (void)height; |
| assert(has_no_stats_stage(cpi)); |
| assert(cpi->oxcf.rc_cfg.mode == AOM_CQ); |
| |
| *top_index = q; |
| *bottom_index = q; |
| |
| return q; |
| } |
| #endif // USE_UNRESTRICTED_Q_IN_CQ_MODE |
| |
| #define STATIC_MOTION_THRESH 95 |
| static void get_intra_q_and_bounds(const AV1_COMP *cpi, int width, int height, |
| int *active_best, int *active_worst, int qp, |
| int is_fwd_kf) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const AV1EncoderConfig *const oxcf = &cpi->oxcf; |
| int active_best_quality; |
| int active_worst_quality = *active_worst; |
| const int bit_depth = cm->seq_params.bit_depth; |
| |
| if (rc->frames_to_key <= 1 && oxcf->rc_cfg.mode == AOM_Q) { |
| // If the next frame is also a key frame or the current frame is the |
| // only frame in the sequence in AOM_Q mode, just use the qp as q. |
| active_best_quality = qp; |
| active_worst_quality = qp; |
| } else if (is_fwd_kf) { |
| // Handle the special case for forward reference key frames. |
| // Increase the boost because this keyframe is used as a forward and |
| // backward reference. |
| 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 * 0.25, bit_depth); |
| active_best_quality = AOMMAX(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. |
| double last_boosted_q; |
| int delta_qindex; |
| int qindex; |
| |
| 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 * 0.50, |
| 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); |
| if (cpi->is_screen_content_type) { |
| active_best_quality /= 2; |
| } |
| |
| // 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); |
| |
| // Tweak active_best_quality for AOM_Q mode when superres is on, as this |
| // will be used directly as 'q' later. |
| if (oxcf->rc_cfg.mode == AOM_Q && |
| (cpi->superres_mode == AOM_SUPERRES_QTHRESH || |
| cpi->superres_mode == AOM_SUPERRES_AUTO) && |
| cm->superres_scale_denominator != SCALE_NUMERATOR) { |
| active_best_quality = |
| AOMMAX(active_best_quality - |
| ((cm->superres_scale_denominator - SCALE_NUMERATOR) * |
| SUPERRES_QADJ_PER_DENOM_KEYFRAME), |
| 0); |
| } |
| } |
| *active_best = active_best_quality; |
| *active_worst = active_worst_quality; |
| } |
| |
| static void adjust_active_best_and_worst_quality(const AV1_COMP *cpi, |
| const int is_intrl_arf_boost, |
| int *active_worst, |
| int *active_best) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| const int bit_depth = cpi->common.seq_params.bit_depth; |
| int active_best_quality = *active_best; |
| int active_worst_quality = *active_worst; |
| // Extension to max or min Q if undershoot or overshoot is outside |
| // the permitted range. |
| if (cpi->oxcf.rc_cfg.mode != AOM_Q) { |
| if (frame_is_intra_only(cm) || |
| (!rc->is_src_frame_alt_ref && (level <= 1 || is_intrl_arf_boost))) { |
| 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(); |
| #ifndef STRICT_RC |
| // 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)) { |
| const int qdelta = av1_frame_type_qdelta(cpi, active_worst_quality); |
| active_worst_quality = |
| AOMMAX(active_worst_quality + qdelta, active_best_quality); |
| } |
| #endif |
| |
| // 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->current_frame.frame_type, active_best_quality, 2.0, |
| cpi->is_screen_content_type, 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); |
| |
| *active_best = active_best_quality; |
| *active_worst = active_worst_quality; |
| } |
| |
| /*!\brief Gets a Q value to use for the current frame |
| * |
| * |
| * Selects a Q value from a permitted range that we estimate |
| * will result in approximately the target number of bits. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder instance structure |
| * \param[in] width Width of frame |
| * \param[in] height Height of frame |
| * \param[in] active_worst_quality Max Q allowed |
| * \param[in] active_best_quality Min Q allowed |
| * |
| * \return The suggested Q for this frame. |
| */ |
| static int get_q(const AV1_COMP *cpi, const int width, const int height, |
| const int active_worst_quality, |
| const int active_best_quality) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| int q; |
| |
| if (cpi->oxcf.rc_cfg.mode == AOM_Q || |
| (frame_is_intra_only(cm) && !rc->this_key_frame_forced && |
| cpi->twopass.kf_zeromotion_pct >= STATIC_KF_GROUP_THRESH && |
| rc->frames_to_key > 1)) { |
| 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); |
| } |
| q = clamp(q, active_best_quality, active_worst_quality); |
| } 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) { |
| q = active_worst_quality; |
| } |
| } |
| q = AOMMAX(q, active_best_quality); |
| } |
| return q; |
| } |
| |
| // Returns |active_best_quality| for an inter frame. |
| // The |active_best_quality| depends on different rate control modes: |
| // VBR, Q, CQ, CBR. |
| // The returning active_best_quality could further be adjusted in |
| // adjust_active_best_and_worst_quality(). |
| static int get_active_best_quality(const AV1_COMP *const cpi, |
| const int active_worst_quality, const int qp, |
| const int gf_index, int *const level1_qp) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const int bit_depth = cm->seq_params.bit_depth; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const AV1EncoderConfig *const oxcf = &cpi->oxcf; |
| const GF_GROUP *gf_group = &cpi->gf_group; |
| const enum aom_rc_mode rc_mode = oxcf->rc_cfg.mode; |
| int *inter_minq; |
| ASSIGN_MINQ_TABLE(bit_depth, inter_minq); |
| int active_best_quality = 0; |
| const int is_level1_frame = (gf_group->layer_depth[gf_index] <= 1); |
| const int is_bottom_leaf_frame = |
| (gf_group->layer_depth[gf_index] == MAX_ARF_LAYERS); |
| assert(IMPLIES(is_bottom_leaf_frame, !is_level1_frame)); |
| const int is_overlay_frame = rc->is_src_frame_alt_ref; |
| |
| if (is_bottom_leaf_frame || is_overlay_frame) { |
| if (rc_mode == AOM_Q) return qp; |
| |
| 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 ((rc_mode == AOM_CQ) && (active_best_quality < qp)) { |
| active_best_quality = qp; |
| } |
| return active_best_quality; |
| } |
| |
| // Determine active_best_quality for frames that are not leaf or overlay. |
| int q = active_worst_quality; |
| // 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]; |
| } |
| if (rc_mode == AOM_CQ && q < qp) q = qp; |
| active_best_quality = get_gf_active_quality( |
| rc, q, cpi->oxcf.gf_cfg.lag_in_frames == 0, bit_depth); |
| // Constrained quality use slightly lower active best. |
| if (rc_mode == AOM_CQ) active_best_quality = active_best_quality * 15 / 16; |
| const int min_boost = get_gf_high_motion_quality( |
| q, cpi->oxcf.gf_cfg.lag_in_frames == 0, bit_depth); |
| const int boost = min_boost - active_best_quality; |
| active_best_quality = min_boost - (int)(boost * rc->arf_boost_factor); |
| if (is_level1_frame) return active_best_quality; |
| |
| if (rc_mode == AOM_Q || rc_mode == AOM_CQ) { |
| if (rc->level1_qp == -1) { // Uninitialized |
| // We are coding frames in display order, but potentially with different |
| // 'pyramid' levels. In this case, there is no ARF_UPDATE frame, and |
| // rc->level1_qp may not be set yet. So, we set that now, to be used for |
| // the subsequent frames in this GF group. |
| assert(!is_level1_frame && !is_bottom_leaf_frame); |
| *level1_qp = active_best_quality; |
| } else { |
| // rc->level1_qp was set from: |
| // - ARF_UPDATE frame earlier, in case of out-of-order coding, OR |
| // - by a previous leaf frame through the 'if' above, in case of coding |
| // frames in display order. So, we use that as a base and then tweak it |
| // below, based on the pyramid level of this frame. |
| active_best_quality = rc->level1_qp; |
| } |
| } |
| int this_height = gf_group_pyramid_level(gf_group, gf_index); |
| while (this_height > 1) { |
| active_best_quality = (active_best_quality + active_worst_quality + 1) / 2; |
| --this_height; |
| } |
| return active_best_quality; |
| } |
| |
| /*!\brief Picks q and q bounds given rate control parameters in \c cpi->rc. |
| * |
| * Handles the the general cases not covered by |
| * \ref rc_pick_q_and_bounds_no_stats_cbr() and |
| * \ref rc_pick_q_and_bounds_no_stats() |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder structure |
| * \param[in] width Coded frame width |
| * \param[in] height Coded frame height |
| * \param[in] gf_index Index of this frame in the golden frame group |
| * \param[out] bottom_index Bottom bound for q index (best quality) |
| * \param[out] top_index Top bound for q index (worst quality) |
| * \param[out] level1_qp Quality for frame(s) at pyramid level 1 |
| * \return Returns selected q index to be used for encoding this frame. |
| */ |
| static int rc_pick_q_and_bounds(const AV1_COMP *cpi, int width, int height, |
| int gf_index, int *bottom_index, int *top_index, |
| int *level1_qp) { |
| 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->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| assert(IMPLIES(has_no_stats_stage(cpi), |
| cpi->oxcf.rc_cfg.mode == AOM_Q && |
| gf_group->update_type[gf_index] != ARF_UPDATE && |
| gf_group->update_type[gf_index] != KFFLT_UPDATE)); |
| const int qp = |
| get_active_qp(rc, oxcf, frame_is_intra_only(cm), cpi->superres_mode, |
| cm->superres_scale_denominator); |
| const int bit_depth = cm->seq_params.bit_depth; |
| |
| if (oxcf->q_cfg.use_fixed_qp_offsets) { |
| return get_q_using_fixed_offsets(oxcf, rc, gf_group, gf_group->index, qp, |
| bit_depth); |
| } |
| |
| int active_best_quality = 0; |
| int active_worst_quality = rc->active_worst_quality; |
| int q; |
| |
| const int is_intrl_arf_boost = |
| gf_group->update_type[gf_index] == INTNL_ARF_UPDATE; |
| |
| if (frame_is_intra_only(cm)) { |
| const int is_fwd_kf = cm->current_frame.frame_type == KEY_FRAME && |
| cm->show_frame == 0 && cpi->no_show_fwd_kf; |
| get_intra_q_and_bounds(cpi, width, height, &active_best_quality, |
| &active_worst_quality, qp, is_fwd_kf); |
| #ifdef STRICT_RC |
| active_best_quality = 0; |
| #endif |
| } else { |
| // Active best quality limited by previous layer. |
| const int pyramid_level = gf_group_pyramid_level(gf_group, gf_index); |
| |
| if ((pyramid_level <= 1) || (pyramid_level > MAX_ARF_LAYERS) || |
| (oxcf->rc_cfg.mode == AOM_Q)) { |
| active_best_quality = get_active_best_quality(cpi, active_worst_quality, |
| qp, gf_index, level1_qp); |
| } else { |
| active_best_quality = rc->active_best_quality[pyramid_level - 1] + 1; |
| active_best_quality = AOMMIN(active_best_quality, active_worst_quality); |
| #ifdef STRICT_RC |
| active_best_quality += (active_worst_quality - active_best_quality) / 16; |
| #else |
| active_best_quality += (active_worst_quality - active_best_quality) / 2; |
| #endif |
| } |
| |
| // For alt_ref and GF frames (including internal arf frames) adjust the |
| // worst allowed quality as well. This insures that even on hard |
| // sections we dont clamp the Q at the same value for arf frames and |
| // leaf (non arf) frames. This is important to the TPL model which assumes |
| // Q drops with each arf level. |
| if (!(rc->is_src_frame_alt_ref) && (level <= 1 || is_intrl_arf_boost)) { |
| active_worst_quality = |
| (active_best_quality + (3 * active_worst_quality) + 2) / 4; |
| } |
| } |
| |
| adjust_active_best_and_worst_quality( |
| cpi, is_intrl_arf_boost, &active_worst_quality, &active_best_quality); |
| q = get_q(cpi, width, height, active_worst_quality, active_best_quality); |
| |
| // Special case when we are targeting the max allowed rate. |
| if (rc->this_frame_target >= rc->max_frame_bandwidth && |
| q > active_worst_quality) { |
| active_worst_quality = q; |
| } |
| |
| *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(const AV1_COMP *cpi, RATE_CONTROL *rc, int width, |
| int height, int gf_index, int *bottom_index, |
| int *top_index) { |
| int q; |
| // TODO(sarahparker) merge no-stats vbr and altref q computation |
| // with rc_pick_q_and_bounds(). |
| const GF_GROUP *gf_group = &cpi->gf_group; |
| if ((cpi->oxcf.rc_cfg.mode != AOM_Q || |
| gf_group->update_type[gf_index] == ARF_UPDATE || |
| gf_group->update_type[gf_index] == KFFLT_UPDATE) && |
| has_no_stats_stage(cpi)) { |
| if (cpi->oxcf.rc_cfg.mode == AOM_CBR) { |
| q = rc_pick_q_and_bounds_no_stats_cbr(cpi, width, height, bottom_index, |
| top_index); |
| #if USE_UNRESTRICTED_Q_IN_CQ_MODE |
| } else if (cpi->oxcf.rc_cfg.mode == AOM_CQ) { |
| q = rc_pick_q_and_bounds_no_stats_cq(cpi, width, height, bottom_index, |
| top_index); |
| #endif // USE_UNRESTRICTED_Q_IN_CQ_MODE |
| } else { |
| q = rc_pick_q_and_bounds_no_stats(cpi, width, height, gf_index, |
| bottom_index, top_index); |
| } |
| } else { |
| q = rc_pick_q_and_bounds(cpi, width, height, gf_index, bottom_index, |
| top_index, &rc->level1_qp); |
| } |
| if (gf_group->update_type[gf_index] == ARF_UPDATE || |
| gf_group->update_type[gf_index] == KFFLT_UPDATE) |
| rc->level1_qp = 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_cfg.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. |
| assert(cpi->sf.hl_sf.recode_tolerance <= 100); |
| const int tolerance = (int)AOMMAX( |
| 100, ((int64_t)cpi->sf.hl_sf.recode_tolerance * frame_target) / 100); |
| *frame_under_shoot_limit = AOMMAX(frame_target - tolerance, 0); |
| *frame_over_shoot_limit = |
| AOMMIN(frame_target + tolerance, cpi->rc.max_frame_bandwidth); |
| } |
| } |
| |
| void av1_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) && cpi->oxcf.rc_cfg.mode != AOM_CBR) { |
| rc->this_frame_target = |
| (int)(rc->this_frame_target * |
| resize_rate_factor(&cpi->oxcf.frm_dim_cfg, width, height)); |
| } |
| |
| // Target rate per SB64 (including partial SB64s. |
| rc->sb64_target_rate = |
| (int)(((int64_t)rc->this_frame_target << 12) / (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; |
| } |
| |
| static void update_golden_frame_stats(AV1_COMP *cpi) { |
| RATE_CONTROL *const rc = &cpi->rc; |
| |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| // Update the Golden frame usage counts. |
| if (gf_group->update_type[gf_group->index] == GF_UPDATE || |
| rc->is_src_frame_alt_ref) { |
| rc->frames_since_golden = 0; |
| } else if (cpi->common.show_frame) { |
| rc->frames_since_golden++; |
| } |
| } |
| |
| void av1_rc_postencode_update(AV1_COMP *cpi, uint64_t bytes_used) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const CurrentFrame *const current_frame = &cm->current_frame; |
| RATE_CONTROL *const rc = &cpi->rc; |
| const GF_GROUP *const gf_group = &cpi->gf_group; |
| const int level = gf_group->layer_depth[gf_group->index]; |
| |
| const int is_intrnl_arf = |
| gf_group->update_type[gf_group->index] == INTNL_ARF_UPDATE; |
| |
| const int qindex = cm->quant_params.base_qindex; |
| |
| // 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 (current_frame->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 && !(level <= 1 || is_intrnl_arf))) { |
| 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) || |
| (current_frame->frame_type == KEY_FRAME) || |
| (!rc->constrained_gf_group && (level <= 1 || is_intrnl_arf))) { |
| rc->last_boosted_qindex = qindex; |
| } |
| if (current_frame->frame_type == KEY_FRAME) rc->last_kf_qindex = qindex; |
| |
| update_buffer_level(cpi, rc->projected_frame_size); |
| rc->prev_avg_frame_bandwidth = rc->avg_frame_bandwidth; |
| |
| // 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->oxcf.frm_dim_cfg, |
| cm->width, cm->height)); |
| if (current_frame->frame_type != KEY_FRAME) { |
| rc->rolling_target_bits = (int)ROUND_POWER_OF_TWO_64( |
| rc->rolling_target_bits * 3 + rc->this_frame_target, 2); |
| rc->rolling_actual_bits = (int)ROUND_POWER_OF_TWO_64( |
| rc->rolling_actual_bits * 3 + rc->projected_frame_size, 2); |
| rc->long_rolling_target_bits = (int)ROUND_POWER_OF_TWO_64( |
| rc->long_rolling_target_bits * 31 + rc->this_frame_target, 5); |
| rc->long_rolling_actual_bits = (int)ROUND_POWER_OF_TWO_64( |
| 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 (is_altref_enabled(cpi->oxcf.gf_cfg.lag_in_frames, |
| cpi->oxcf.gf_cfg.enable_auto_arf) && |
| gf_group->update_type[gf_group->index] == ARF_UPDATE && |
| (current_frame->frame_type != KEY_FRAME && !frame_is_sframe(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 (current_frame->frame_type == KEY_FRAME) rc->frames_since_key = 0; |
| // if (current_frame->frame_number == 1 && cm->show_frame) |
| /* |
| rc->this_frame_target = |
| (int)(rc->this_frame_target / resize_rate_factor(&cpi->oxcf.frm_dim_cfg, |
| 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; |
| } |
| |
| int av1_find_qindex(double desired_q, aom_bit_depth_t bit_depth, |
| int best_qindex, int worst_qindex) { |
| assert(best_qindex <= worst_qindex); |
| int low = best_qindex; |
| int high = worst_qindex; |
| while (low < high) { |
| const int mid = (low + high) >> 1; |
| const double mid_q = av1_convert_qindex_to_q(mid, bit_depth); |
| if (mid_q < desired_q) { |
| low = mid + 1; |
| } else { |
| high = mid; |
| } |
| } |
| assert(low == high); |
| assert(av1_convert_qindex_to_q(low, bit_depth) >= desired_q || |
| low == worst_qindex); |
| return low; |
| } |
| |
| int av1_compute_qdelta(const RATE_CONTROL *rc, double qstart, double qtarget, |
| aom_bit_depth_t bit_depth) { |
| const int start_index = |
| av1_find_qindex(qstart, bit_depth, rc->best_quality, rc->worst_quality); |
| const int target_index = |
| av1_find_qindex(qtarget, bit_depth, rc->best_quality, rc->worst_quality); |
| return target_index - start_index; |
| } |
| |
| // Find q_index for the desired_bits_per_mb, within [best_qindex, worst_qindex], |
| // assuming 'correction_factor' is 1.0. |
| // To be precise, 'q_index' is the smallest integer, for which the corresponding |
| // bits per mb <= desired_bits_per_mb. |
| // If no such q index is found, returns 'worst_qindex'. |
| static int find_qindex_by_rate(int desired_bits_per_mb, |
| aom_bit_depth_t bit_depth, FRAME_TYPE frame_type, |
| const int is_screen_content_type, |
| int best_qindex, int worst_qindex) { |
| assert(best_qindex <= worst_qindex); |
| int low = best_qindex; |
| int high = worst_qindex; |
| while (low < high) { |
| const int mid = (low + high) >> 1; |
| const int mid_bits_per_mb = av1_rc_bits_per_mb( |
| frame_type, mid, 1.0, bit_depth, is_screen_content_type); |
| if (mid_bits_per_mb > desired_bits_per_mb) { |
| low = mid + 1; |
| } else { |
| high = mid; |
| } |
| } |
| assert(low == high); |
| assert(av1_rc_bits_per_mb(frame_type, low, 1.0, bit_depth, |
| is_screen_content_type) <= desired_bits_per_mb || |
| low == worst_qindex); |
| return low; |
| } |
| |
| int av1_compute_qdelta_by_rate(const RATE_CONTROL *rc, FRAME_TYPE frame_type, |
| int qindex, double rate_target_ratio, |
| const int is_screen_content_type, |
| aom_bit_depth_t bit_depth) { |
| // 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, is_screen_content_type); |
| |
| // 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); |
| |
| const int target_index = find_qindex_by_rate( |
| target_bits_per_mb, bit_depth, frame_type, is_screen_content_type, |
| rc->best_quality, rc->worst_quality); |
| 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; |
| rc->max_gf_interval = oxcf->gf_cfg.max_gf_interval; |
| rc->min_gf_interval = oxcf->gf_cfg.min_gf_interval; |
| if (rc->min_gf_interval == 0) |
| rc->min_gf_interval = av1_rc_get_default_min_gf_interval( |
| oxcf->frm_dim_cfg.width, oxcf->frm_dim_cfg.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 max interval for genuinely static scenes like slide shows. |
| * The no.of.stats available in the case of LAP is limited, |
| * hence setting to max_gf_interval. |
| */ |
| if (cpi->lap_enabled) |
| rc->static_scene_max_gf_interval = rc->max_gf_interval + 1; |
| else |
| 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 = 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->rc_cfg.target_bandwidth / cpi->framerate); |
| rc->min_frame_bandwidth = |
| (int)(rc->avg_frame_bandwidth * oxcf->rc_cfg.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->rc_cfg.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; |
| const int stats_count = |
| cpi->twopass.stats_buf_ctx->total_stats != NULL |
| ? (int)cpi->twopass.stats_buf_ctx->total_stats->count |
| : 0; |
| const int frame_window = AOMMIN( |
| 16, (int)(stats_count - (int)cpi->common.current_frame.frame_number)); |
| assert(VBR_PCT_ADJUSTMENT_LIMIT <= 100); |
| if (frame_window > 0) { |
| const int max_delta = (int)AOMMIN( |
| abs((int)(vbr_bits_off_target / frame_window)), |
| ((int64_t)(*this_frame_target) * VBR_PCT_ADJUSTMENT_LIMIT) / 100); |
| |
| // vbr_bits_off_target > 0 means we have extra bits to spend |
| // vbr_bits_off_target < 0 we are currently overshooting |
| *this_frame_target += (vbr_bits_off_target >= 0) ? max_delta : -max_delta; |
| } |
| |
| // 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_cfg.mode == AOM_VBR || cpi->oxcf.rc_cfg.mode == AOM_CQ) |
| vbr_rate_correction(cpi, &target_rate); |
| av1_rc_set_frame_target(cpi, target_rate, width, height); |
| } |
| |
| int av1_calc_pframe_target_size_one_pass_vbr( |
| const AV1_COMP *const cpi, FRAME_UPDATE_TYPE frame_update_type) { |
| static const int af_ratio = 10; |
| const RATE_CONTROL *const rc = &cpi->rc; |
| int64_t target; |
| #if USE_ALTREF_FOR_ONE_PASS |
| if (frame_update_type == KF_UPDATE || frame_update_type == GF_UPDATE || |
| frame_update_type == ARF_UPDATE || frame_update_type == KFFLT_UPDATE) { |
| target = ((int64_t)rc->avg_frame_bandwidth * rc->baseline_gf_interval * |
| af_ratio) / |
| (rc->baseline_gf_interval + af_ratio - 1); |
| } else { |
| target = ((int64_t)rc->avg_frame_bandwidth * rc->baseline_gf_interval) / |
| (rc->baseline_gf_interval + af_ratio - 1); |
| } |
| if (target > INT_MAX) target = INT_MAX; |
| #else |
| target = rc->avg_frame_bandwidth; |
| #endif |
| return av1_rc_clamp_pframe_target_size(cpi, (int)target, frame_update_type); |
| } |
| |
| int av1_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); |
| } |
| |
| int av1_calc_pframe_target_size_one_pass_cbr( |
| const AV1_COMP *cpi, FRAME_UPDATE_TYPE frame_update_type) { |
| const AV1EncoderConfig *oxcf = &cpi->oxcf; |
| const RATE_CONTROL *rc = &cpi->rc; |
| const RateControlCfg *rc_cfg = &oxcf->rc_cfg; |
| 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 (rc_cfg->gf_cbr_boost_pct) { |
| const int af_ratio_pct = rc_cfg->gf_cbr_boost_pct + 100; |
| if (frame_update_type == GF_UPDATE || frame_update_type == OVERLAY_UPDATE || |
| frame_update_type == KFFLT_OVERLAY_UPDATE) { |
| target = |
| (rc->avg_frame_bandwidth * rc->baseline_gf_interval * af_ratio_pct) / |
| (rc->baseline_gf_interval * 100 + af_ratio_pct - 100); |
| } else { |
| target = (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, rc_cfg->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, rc_cfg->over_shoot_pct); |
| target += (target * pct_high) / 200; |
| } |
| if (rc_cfg->max_inter_bitrate_pct) { |
| const int max_rate = |
| rc->avg_frame_bandwidth * rc_cfg->max_inter_bitrate_pct / 100; |
| target = AOMMIN(target, max_rate); |
| } |
| return AOMMAX(min_frame_target, target); |
| } |
| |
| int av1_calc_iframe_target_size_one_pass_cbr(const AV1_COMP *cpi) { |
| const RATE_CONTROL *rc = &cpi->rc; |
| int target; |
| if (cpi->common.current_frame.frame_number == 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); |
| } |