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c4a205c7fa
Bug: None Change-Id: I5388bc018d7ddd285d154436b5fc52a15469a97d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/319220 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Björn Terelius <terelius@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40710}
136 lines
4.9 KiB
C++
136 lines
4.9 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
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#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/field_trials_view.h"
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#include "api/network_state_predictor.h"
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#include "api/transport/network_types.h"
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#include "api/units/data_rate.h"
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#include "api/units/time_delta.h"
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#include "api/units/timestamp.h"
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#include "modules/congestion_controller/goog_cc/delay_increase_detector_interface.h"
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#include "modules/congestion_controller/goog_cc/inter_arrival_delta.h"
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#include "modules/congestion_controller/goog_cc/link_capacity_estimator.h"
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#include "modules/congestion_controller/goog_cc/probe_bitrate_estimator.h"
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#include "modules/remote_bitrate_estimator/aimd_rate_control.h"
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#include "modules/remote_bitrate_estimator/inter_arrival.h"
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#include "rtc_base/experiments/struct_parameters_parser.h"
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#include "rtc_base/race_checker.h"
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namespace webrtc {
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class RtcEventLog;
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struct BweSeparateAudioPacketsSettings {
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static constexpr char kKey[] = "WebRTC-Bwe-SeparateAudioPackets";
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BweSeparateAudioPacketsSettings() = default;
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explicit BweSeparateAudioPacketsSettings(
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const FieldTrialsView* key_value_config);
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bool enabled = false;
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int packet_threshold = 10;
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TimeDelta time_threshold = TimeDelta::Seconds(1);
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std::unique_ptr<StructParametersParser> Parser();
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};
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class DelayBasedBwe {
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public:
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struct Result {
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Result();
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~Result() = default;
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bool updated;
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bool probe;
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DataRate target_bitrate = DataRate::Zero();
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bool recovered_from_overuse;
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BandwidthUsage delay_detector_state;
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};
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explicit DelayBasedBwe(const FieldTrialsView* key_value_config,
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RtcEventLog* event_log,
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NetworkStatePredictor* network_state_predictor);
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DelayBasedBwe() = delete;
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DelayBasedBwe(const DelayBasedBwe&) = delete;
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DelayBasedBwe& operator=(const DelayBasedBwe&) = delete;
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virtual ~DelayBasedBwe();
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Result IncomingPacketFeedbackVector(
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const TransportPacketsFeedback& msg,
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absl::optional<DataRate> acked_bitrate,
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absl::optional<DataRate> probe_bitrate,
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absl::optional<NetworkStateEstimate> network_estimate,
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bool in_alr);
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void OnRttUpdate(TimeDelta avg_rtt);
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bool LatestEstimate(std::vector<uint32_t>* ssrcs, DataRate* bitrate) const;
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void SetStartBitrate(DataRate start_bitrate);
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void SetMinBitrate(DataRate min_bitrate);
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TimeDelta GetExpectedBwePeriod() const;
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DataRate TriggerOveruse(Timestamp at_time,
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absl::optional<DataRate> link_capacity);
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DataRate last_estimate() const { return prev_bitrate_; }
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BandwidthUsage last_state() const { return prev_state_; }
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private:
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friend class GoogCcStatePrinter;
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void IncomingPacketFeedback(const PacketResult& packet_feedback,
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Timestamp at_time);
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Result MaybeUpdateEstimate(
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absl::optional<DataRate> acked_bitrate,
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absl::optional<DataRate> probe_bitrate,
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absl::optional<NetworkStateEstimate> state_estimate,
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bool recovered_from_overuse,
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bool in_alr,
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Timestamp at_time);
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// Updates the current remote rate estimate and returns true if a valid
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// estimate exists.
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bool UpdateEstimate(Timestamp at_time,
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absl::optional<DataRate> acked_bitrate,
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DataRate* target_rate);
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rtc::RaceChecker network_race_;
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RtcEventLog* const event_log_;
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const FieldTrialsView* const key_value_config_;
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// Alternatively, run two separate overuse detectors for audio and video,
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// and fall back to the audio one if we haven't seen a video packet in a
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// while.
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BweSeparateAudioPacketsSettings separate_audio_;
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int64_t audio_packets_since_last_video_;
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Timestamp last_video_packet_recv_time_;
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NetworkStatePredictor* network_state_predictor_;
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std::unique_ptr<InterArrival> video_inter_arrival_;
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std::unique_ptr<InterArrivalDelta> video_inter_arrival_delta_;
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std::unique_ptr<DelayIncreaseDetectorInterface> video_delay_detector_;
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std::unique_ptr<InterArrival> audio_inter_arrival_;
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std::unique_ptr<InterArrivalDelta> audio_inter_arrival_delta_;
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std::unique_ptr<DelayIncreaseDetectorInterface> audio_delay_detector_;
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DelayIncreaseDetectorInterface* active_delay_detector_;
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Timestamp last_seen_packet_;
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bool uma_recorded_;
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AimdRateControl rate_control_;
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DataRate prev_bitrate_;
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BandwidthUsage prev_state_;
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};
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
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