mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-15 06:40:43 +01:00
b6787bcd79
Bug: webrtc:9718 Change-Id: I1b6ed37afd7680dfad6267addfe46155c378525d Reviewed-on: https://webrtc-review.googlesource.com/c/110903 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25702}
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2016 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.
|
|
*/
|
|
|
|
#ifndef MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
|
|
#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "modules/congestion_controller/goog_cc/delay_increase_detector_interface.h"
|
|
#include "modules/congestion_controller/goog_cc/probe_bitrate_estimator.h"
|
|
#include "modules/remote_bitrate_estimator/aimd_rate_control.h"
|
|
#include "modules/remote_bitrate_estimator/include/bwe_defines.h"
|
|
#include "modules/remote_bitrate_estimator/inter_arrival.h"
|
|
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h" // For PacketFeedback
|
|
#include "rtc_base/constructormagic.h"
|
|
#include "rtc_base/race_checker.h"
|
|
|
|
namespace webrtc {
|
|
class RtcEventLog;
|
|
|
|
class DelayBasedBwe {
|
|
public:
|
|
struct Result {
|
|
Result();
|
|
Result(bool probe, DataRate target_bitrate);
|
|
~Result();
|
|
bool updated;
|
|
bool probe;
|
|
DataRate target_bitrate = DataRate::Zero();
|
|
bool recovered_from_overuse;
|
|
};
|
|
|
|
explicit DelayBasedBwe(RtcEventLog* event_log);
|
|
virtual ~DelayBasedBwe();
|
|
|
|
Result IncomingPacketFeedbackVector(
|
|
const std::vector<PacketFeedback>& packet_feedback_vector,
|
|
absl::optional<DataRate> acked_bitrate,
|
|
Timestamp at_time);
|
|
Result OnDelayedFeedback(Timestamp receive_time);
|
|
void OnRttUpdate(TimeDelta avg_rtt);
|
|
bool LatestEstimate(std::vector<uint32_t>* ssrcs, DataRate* bitrate) const;
|
|
void SetStartBitrate(DataRate start_bitrate);
|
|
void SetMinBitrate(DataRate min_bitrate);
|
|
TimeDelta GetExpectedBwePeriod() const;
|
|
|
|
private:
|
|
friend class GoogCcStatePrinter;
|
|
void IncomingPacketFeedback(const PacketFeedback& packet_feedback,
|
|
Timestamp at_time);
|
|
Result OnLongFeedbackDelay(Timestamp arrival_time);
|
|
Result MaybeUpdateEstimate(absl::optional<DataRate> acked_bitrate,
|
|
bool request_probe,
|
|
Timestamp at_time);
|
|
// Updates the current remote rate estimate and returns true if a valid
|
|
// estimate exists.
|
|
bool UpdateEstimate(Timestamp now,
|
|
absl::optional<DataRate> acked_bitrate,
|
|
DataRate* target_bitrate);
|
|
|
|
rtc::RaceChecker network_race_;
|
|
RtcEventLog* const event_log_;
|
|
std::unique_ptr<InterArrival> inter_arrival_;
|
|
std::unique_ptr<DelayIncreaseDetectorInterface> delay_detector_;
|
|
Timestamp last_seen_packet_;
|
|
bool uma_recorded_;
|
|
AimdRateControl rate_control_;
|
|
ProbeBitrateEstimator probe_bitrate_estimator_;
|
|
size_t trendline_window_size_;
|
|
double trendline_smoothing_coeff_;
|
|
double trendline_threshold_gain_;
|
|
int consecutive_delayed_feedbacks_;
|
|
DataRate prev_bitrate_;
|
|
BandwidthUsage prev_state_;
|
|
|
|
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DelayBasedBwe);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
|