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https://github.com/mollyim/webrtc.git
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b357e54dd5
Bug: none Change-Id: Ie92c4ef82e5ce3e222ec85df21acfb233b16b85d Reviewed-on: https://webrtc-review.googlesource.com/c/111883 Reviewed-by: Sebastian Jansson <srte@webrtc.org> Commit-Queue: Christoffer Rodbro <crodbro@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25767}
72 lines
2.8 KiB
C++
72 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018 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_RTP_CONTROL_HANDLER_H_
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#define MODULES_CONGESTION_CONTROLLER_RTP_CONTROL_HANDLER_H_
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#include <algorithm>
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#include <memory>
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#include "api/transport/network_control.h"
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#include "modules/congestion_controller/include/network_changed_observer.h"
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#include "modules/pacing/paced_sender.h"
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#include "rtc_base/sequenced_task_checker.h"
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namespace webrtc {
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// This is used to observe the network controller state and route calls to
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// the proper handler. It also keeps cached values for safe asynchronous use.
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// This makes sure that things running on the worker queue can't access state
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// in SendSideCongestionController, which would risk causing data race on
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// destruction unless members are properly ordered.
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class CongestionControlHandler {
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public:
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CongestionControlHandler(NetworkChangedObserver* observer,
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PacedSender* pacer);
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~CongestionControlHandler();
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void PostUpdates(NetworkControlUpdate update);
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void OnNetworkAvailability(NetworkAvailability msg);
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void OnOutstandingData(DataSize in_flight_data);
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void OnPacerQueueUpdate(TimeDelta expected_queue_time);
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absl::optional<TargetTransferRate> last_transfer_rate();
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private:
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void SetPacerState(bool paused);
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void OnNetworkInvalidation();
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bool IsSendQueueFull() const;
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bool HasNetworkParametersToReportChanged(int64_t bitrate_bps,
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float loss_rate_ratio,
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TimeDelta rtt);
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bool HasNetworkParametersToReportChanged(int64_t bitrate_bps,
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uint8_t fraction_loss,
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int64_t rtt);
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NetworkChangedObserver* observer_ = nullptr;
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PacedSender* const pacer_;
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absl::optional<TargetTransferRate> current_target_rate_msg_;
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bool network_available_ = true;
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bool pacer_paused_ = false;
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int64_t last_reported_target_bitrate_bps_ = 0;
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uint8_t last_reported_fraction_loss_ = 0;
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int64_t last_reported_rtt_ms_ = 0;
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const bool pacer_pushback_experiment_;
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const bool disable_pacer_emergency_stop_;
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uint32_t min_pushback_target_bitrate_bps_;
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int64_t pacer_expected_queue_ms_ = 0;
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double encoding_rate_ratio_ = 1.0;
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rtc::SequencedTaskChecker sequenced_checker_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CongestionControlHandler);
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};
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_RTP_CONTROL_HANDLER_H_
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