| /* |
| * Copyright 2025 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "modules/congestion_controller/scream/scream_v2_parameters.h" |
| |
| #include "api/field_trials_view.h" |
| #include "api/units/data_size.h" |
| #include "api/units/time_delta.h" |
| #include "rtc_base/experiments/field_trial_parser.h" |
| |
| namespace webrtc { |
| |
| ScreamV2Parameters::ScreamV2Parameters(const FieldTrialsView& trials) |
| : min_ref_window("MinRefWindow", DataSize::Bytes(3000)), |
| l4s_avg_g_up("L4sAvgGUp", 1.0 / 8.0), |
| l4s_avg_g_down("L4sAvgGDown", 1.0 / 128.0), |
| smoothed_rtt_avg_g_up("SmoothedRttAvgGUp", 1.0 / 8.0), |
| smoothed_l4s_avg_g_down("SmoothedL4sAvgGDown", 1.0 / 128.0), |
| max_segment_size("MaxSegmentSize", DataSize::Bytes(1000)), |
| bytes_in_flight_head_room("BytesInFlightHeadRoom", 1.1), |
| beta_loss("BetaLoss", 0.7), |
| post_congestion_delay_rtts("PostCongestionDelayRtts", 100), |
| multiplicative_increase_factor("MultiplicativeIncreaseFactor", 0.02), |
| virtual_rtt("VirtualRtt", TimeDelta::Millis(25)), |
| // backoff_scale_factor_close_to_ref_window_i is set lower than in the |
| // rfc(8.0). This means that increase/decrease around ref_window_i is |
| // slower in this implementation. |
| backoff_scale_factor_close_to_ref_window_i( |
| "BackoffScaleFactorCloseToRefWindowI", |
| 2.0), |
| number_of_rtts_between_reset_ref_window_i_on_congestion( |
| "NumberOfRttsBetweenResetRefWindowIOnCongestion", |
| 100), |
| ref_window_overhead_min("RefWinMin", 1.5), |
| ref_window_overhead_max("RefWinMax", 4.0), |
| queue_delay_avg_g("QDelayAvgG", 1.0 / 4.0), |
| queue_delay_dev_avg_g("QDelayDevAvgG", 1.0 / 64.0), |
| |
| base_delay_window_length("BaseDelayWindowLength", 10), |
| base_delay_history_update_interval("BaseDelayHistoryUpdateInterval", |
| TimeDelta::Minutes(1)), |
| queue_delay_target("QDelayTarget", TimeDelta::Millis(60)), |
| queue_delay_increased_threshold("QDelayIncreasedThreshold", 0.25), |
| queue_delay_threshold("QDelayThreshold", 0.5), |
| queue_delay_drain_threshold("QDelayDrainThreshold", TimeDelta::Millis(5)), |
| queue_delay_drain_period("QDelayDrainPeriod", TimeDelta::Seconds(20)), |
| queue_delay_drain_rtts("QDelayDrainRtts", 5), |
| periodic_padding_interval("PeriodicPadding", TimeDelta::Seconds(10)), |
| periodic_padding_duration("PaddingDuration", TimeDelta::Seconds(1)), |
| pacing_factor("PacingFactor", 1.1) { |
| ParseFieldTrial({&min_ref_window, |
| &l4s_avg_g_up, |
| &l4s_avg_g_down, |
| &smoothed_rtt_avg_g_up, |
| &smoothed_l4s_avg_g_down, |
| &max_segment_size, |
| &bytes_in_flight_head_room, |
| &beta_loss, |
| &post_congestion_delay_rtts, |
| &multiplicative_increase_factor, |
| &virtual_rtt, |
| &backoff_scale_factor_close_to_ref_window_i, |
| &number_of_rtts_between_reset_ref_window_i_on_congestion, |
| &ref_window_overhead_min, |
| &ref_window_overhead_max, |
| &queue_delay_avg_g, |
| &queue_delay_dev_avg_g, |
| &base_delay_window_length, |
| &base_delay_history_update_interval, |
| &queue_delay_target, |
| &queue_delay_increased_threshold, |
| &queue_delay_threshold, |
| &queue_delay_drain_threshold, |
| &queue_delay_drain_period, |
| &queue_delay_drain_rtts, |
| &periodic_padding_interval, |
| &periodic_padding_duration, |
| &pacing_factor}, |
| trials.Lookup("WebRTC-Bwe-ScreamV2")); |
| } |
| |
| } // namespace webrtc |
