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edcb90755a
Bug: webrtc:11567 Change-Id: Ib3c8f73459088434a70ee86b044dbbbe14db1777 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178810 Reviewed-by: Sebastian Jansson <srte@webrtc.org> Commit-Queue: Markus Handell <handellm@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31652}
115 lines
4.6 KiB
C++
115 lines
4.6 KiB
C++
/*
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* Copyright (c) 2015 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_REMOTE_BITRATE_ESTIMATOR_REMOTE_ESTIMATOR_PROXY_H_
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#define MODULES_REMOTE_BITRATE_ESTIMATOR_REMOTE_ESTIMATOR_PROXY_H_
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#include <map>
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#include <vector>
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#include "api/transport/network_control.h"
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#include "api/transport/webrtc_key_value_config.h"
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#include "modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
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#include "rtc_base/experiments/field_trial_parser.h"
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#include "rtc_base/numerics/sequence_number_util.h"
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#include "rtc_base/synchronization/mutex.h"
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namespace webrtc {
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class Clock;
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class PacketRouter;
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namespace rtcp {
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class TransportFeedback;
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}
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// Class used when send-side BWE is enabled: This proxy is instantiated on the
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// receive side. It buffers a number of receive timestamps and then sends
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// transport feedback messages back too the send side.
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class RemoteEstimatorProxy : public RemoteBitrateEstimator {
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public:
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RemoteEstimatorProxy(Clock* clock,
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TransportFeedbackSenderInterface* feedback_sender,
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const WebRtcKeyValueConfig* key_value_config,
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NetworkStateEstimator* network_state_estimator);
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~RemoteEstimatorProxy() override;
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void IncomingPacket(int64_t arrival_time_ms,
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size_t payload_size,
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const RTPHeader& header) override;
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void RemoveStream(uint32_t ssrc) override {}
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bool LatestEstimate(std::vector<unsigned int>* ssrcs,
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unsigned int* bitrate_bps) const override;
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void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override {}
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void SetMinBitrate(int min_bitrate_bps) override {}
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int64_t TimeUntilNextProcess() override;
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void Process() override;
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void OnBitrateChanged(int bitrate);
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void SetSendPeriodicFeedback(bool send_periodic_feedback);
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private:
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struct TransportWideFeedbackConfig {
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FieldTrialParameter<TimeDelta> back_window{"wind", TimeDelta::Millis(500)};
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FieldTrialParameter<TimeDelta> min_interval{"min", TimeDelta::Millis(50)};
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FieldTrialParameter<TimeDelta> max_interval{"max", TimeDelta::Millis(250)};
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FieldTrialParameter<TimeDelta> default_interval{"def",
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TimeDelta::Millis(100)};
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FieldTrialParameter<double> bandwidth_fraction{"frac", 0.05};
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explicit TransportWideFeedbackConfig(
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const WebRtcKeyValueConfig* key_value_config) {
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ParseFieldTrial({&back_window, &min_interval, &max_interval,
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&default_interval, &bandwidth_fraction},
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key_value_config->Lookup(
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"WebRTC-Bwe-TransportWideFeedbackIntervals"));
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}
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};
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static const int kMaxNumberOfPackets;
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void SendPeriodicFeedbacks() RTC_EXCLUSIVE_LOCKS_REQUIRED(&lock_);
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void SendFeedbackOnRequest(int64_t sequence_number,
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const FeedbackRequest& feedback_request)
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RTC_EXCLUSIVE_LOCKS_REQUIRED(&lock_);
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static int64_t BuildFeedbackPacket(
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uint8_t feedback_packet_count,
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uint32_t media_ssrc,
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int64_t base_sequence_number,
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std::map<int64_t, int64_t>::const_iterator
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begin_iterator, // |begin_iterator| is inclusive.
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std::map<int64_t, int64_t>::const_iterator
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end_iterator, // |end_iterator| is exclusive.
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rtcp::TransportFeedback* feedback_packet);
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Clock* const clock_;
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TransportFeedbackSenderInterface* const feedback_sender_;
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const TransportWideFeedbackConfig send_config_;
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int64_t last_process_time_ms_;
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Mutex lock_;
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// |network_state_estimator_| may be null.
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NetworkStateEstimator* const network_state_estimator_
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RTC_PT_GUARDED_BY(&lock_);
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uint32_t media_ssrc_ RTC_GUARDED_BY(&lock_);
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uint8_t feedback_packet_count_ RTC_GUARDED_BY(&lock_);
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SeqNumUnwrapper<uint16_t> unwrapper_ RTC_GUARDED_BY(&lock_);
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absl::optional<int64_t> periodic_window_start_seq_ RTC_GUARDED_BY(&lock_);
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// Map unwrapped seq -> time.
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std::map<int64_t, int64_t> packet_arrival_times_ RTC_GUARDED_BY(&lock_);
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int64_t send_interval_ms_ RTC_GUARDED_BY(&lock_);
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bool send_periodic_feedback_ RTC_GUARDED_BY(&lock_);
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// Unwraps absolute send times.
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uint32_t previous_abs_send_time_ RTC_GUARDED_BY(&lock_);
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Timestamp abs_send_timestamp_ RTC_GUARDED_BY(&lock_);
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};
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} // namespace webrtc
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#endif // MODULES_REMOTE_BITRATE_ESTIMATOR_REMOTE_ESTIMATOR_PROXY_H_
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