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webrtc/call/rtp_transport_controller_send.h
Per Kjellander 776866774f Propagate desicion if RTP packet should be ECT(1) marked to socket 
With this CL, the decision if an RTP packet should be sent as ect(1) is made in RtpControllerSend depending on if RFC 8888 has been negotiated and if CCFB is received with ECN enabled.
Since webrtc does not yet adapt to ECN feedback, packets are sent as ECT(1) until the first feedback is received.

Change-Id: Iddf63849328afbe54a7c8f921f2e8db134aeff6a
Bug: webrtc:42225697
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/367388
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43609}
2024-12-19 01:59:49 -08:00

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/*
* Copyright (c) 2017 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 CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
#define CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
#include <cstddef>
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "api/environment/environment.h"
#include "api/fec_controller.h"
#include "api/frame_transformer_interface.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "api/task_queue/task_queue_base.h"
#include "api/transport/bandwidth_estimation_settings.h"
#include "api/transport/bitrate_settings.h"
#include "api/transport/network_control.h"
#include "api/transport/network_types.h"
#include "api/units/data_rate.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "call/rtp_bitrate_configurator.h"
#include "call/rtp_config.h"
#include "call/rtp_transport_config.h"
#include "call/rtp_transport_controller_send_interface.h"
#include "call/rtp_video_sender.h"
#include "modules/congestion_controller/rtp/control_handler.h"
#include "modules/congestion_controller/rtp/transport_feedback_adapter.h"
#include "modules/congestion_controller/rtp/transport_feedback_demuxer.h"
#include "modules/pacing/packet_router.h"
#include "modules/pacing/task_queue_paced_sender.h"
#include "modules/rtp_rtcp/include/report_block_data.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/rtcp_packet/congestion_control_feedback.h"
#include "rtc_base/experiments/field_trial_parser.h"
#include "rtc_base/network_route.h"
#include "rtc_base/rate_limiter.h"
#include "rtc_base/task_utils/repeating_task.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class FrameEncryptorInterface;
class RtpTransportControllerSend final
: public RtpTransportControllerSendInterface,
public NetworkLinkRtcpObserver,
public NetworkStateEstimateObserver {
public:
explicit RtpTransportControllerSend(const RtpTransportConfig& config);
~RtpTransportControllerSend() override;
RtpTransportControllerSend(const RtpTransportControllerSend&) = delete;
RtpTransportControllerSend& operator=(const RtpTransportControllerSend&) =
delete;
// TODO(tommi): Change to std::unique_ptr<>.
RtpVideoSenderInterface* CreateRtpVideoSender(
const std::map<uint32_t, RtpState>& suspended_ssrcs,
const std::map<uint32_t, RtpPayloadState>&
states, // move states into RtpTransportControllerSend
const RtpConfig& rtp_config,
int rtcp_report_interval_ms,
Transport* send_transport,
const RtpSenderObservers& observers,
std::unique_ptr<FecController> fec_controller,
const RtpSenderFrameEncryptionConfig& frame_encryption_config,
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer) override;
void DestroyRtpVideoSender(
RtpVideoSenderInterface* rtp_video_sender) override;
// Implements RtpTransportControllerSendInterface
void RegisterSendingRtpStream(RtpRtcpInterface& rtp_module) override;
void DeRegisterSendingRtpStream(RtpRtcpInterface& rtp_module) override;
PacketRouter* packet_router() override;
NetworkStateEstimateObserver* network_state_estimate_observer() override;
RtpPacketSender* packet_sender() override;
void SetAllocatedSendBitrateLimits(BitrateAllocationLimits limits) override;
void ReconfigureBandwidthEstimation(
const BandwidthEstimationSettings& settings) override;
void SetPacingFactor(float pacing_factor) override;
void SetQueueTimeLimit(int limit_ms) override;
StreamFeedbackProvider* GetStreamFeedbackProvider() override;
void RegisterTargetTransferRateObserver(
TargetTransferRateObserver* observer) override;
void OnNetworkRouteChanged(absl::string_view transport_name,
const rtc::NetworkRoute& network_route) override;
void OnNetworkAvailability(bool network_available) override;
NetworkLinkRtcpObserver* GetRtcpObserver() override;
int64_t GetPacerQueuingDelayMs() const override;
std::optional<Timestamp> GetFirstPacketTime() const override;
void EnablePeriodicAlrProbing(bool enable) override;
void OnSentPacket(const rtc::SentPacket& sent_packet) override;
void OnReceivedPacket(const ReceivedPacket& packet_msg) override;
void SetSdpBitrateParameters(const BitrateConstraints& constraints) override;
void SetClientBitratePreferences(const BitrateSettings& preferences) override;
void OnTransportOverheadChanged(
size_t transport_overhead_bytes_per_packet) override;
void AccountForAudioPacketsInPacedSender(bool account_for_audio) override;
void IncludeOverheadInPacedSender() override;
void EnsureStarted() override;
// Implements NetworkLinkRtcpObserver interface
void OnReceiverEstimatedMaxBitrate(Timestamp receive_time,
DataRate bitrate) override;
void OnReport(Timestamp receive_time,
rtc::ArrayView<const ReportBlockData> report_blocks) override;
void OnRttUpdate(Timestamp receive_time, TimeDelta rtt) override;
void OnTransportFeedback(Timestamp receive_time,
const rtcp::TransportFeedback& feedback) override;
void OnCongestionControlFeedback(
Timestamp receive_time,
const rtcp::CongestionControlFeedback& feedback) override;
// Implements NetworkStateEstimateObserver interface
void OnRemoteNetworkEstimate(NetworkStateEstimate estimate) override;
NetworkControllerInterface* GetNetworkController() override {
RTC_DCHECK_RUN_ON(&sequence_checker_);
return controller_.get();
}
// Called once it's known that the remote end supports RFC 8888.
void EnableCongestionControlFeedbackAccordingToRfc8888() override;
int ReceivedCongestionControlFeedbackCount() const override {
RTC_DCHECK_RUN_ON(&sequence_checker_);
return feedback_count_;
}
int ReceivedTransportCcFeedbackCount() const override {
RTC_DCHECK_RUN_ON(&sequence_checker_);
return transport_cc_feedback_count_;
}
private:
void MaybeCreateControllers() RTC_RUN_ON(sequence_checker_);
void HandleTransportPacketsFeedback(const TransportPacketsFeedback& feedback)
RTC_RUN_ON(sequence_checker_);
void UpdateNetworkAvailability() RTC_RUN_ON(sequence_checker_);
void UpdateInitialConstraints(TargetRateConstraints new_contraints)
RTC_RUN_ON(sequence_checker_);
void StartProcessPeriodicTasks() RTC_RUN_ON(sequence_checker_);
void UpdateControllerWithTimeInterval() RTC_RUN_ON(sequence_checker_);
std::optional<BitrateConstraints> ApplyOrLiftRelayCap(bool is_relayed);
bool IsRelevantRouteChange(const rtc::NetworkRoute& old_route,
const rtc::NetworkRoute& new_route) const;
void UpdateBitrateConstraints(const BitrateConstraints& updated);
void UpdateStreamsConfig() RTC_RUN_ON(sequence_checker_);
void PostUpdates(NetworkControlUpdate update) RTC_RUN_ON(sequence_checker_);
void UpdateControlState() RTC_RUN_ON(sequence_checker_);
void UpdateCongestedState() RTC_RUN_ON(sequence_checker_);
std::optional<bool> GetCongestedStateUpdate() const
RTC_RUN_ON(sequence_checker_);
// Called by packet router just before packet is sent to the RTP modules.
void NotifyBweOfPacedSentPacket(const RtpPacketToSend& packet,
const PacedPacketInfo& pacing_info);
void ProcessSentPacket(const rtc::SentPacket& sent_packet)
RTC_RUN_ON(sequence_checker_);
void ProcessSentPacketUpdates(NetworkControlUpdate updates)
RTC_RUN_ON(sequence_checker_);
const Environment env_;
SequenceChecker sequence_checker_;
TaskQueueBase* task_queue_;
PacketRouter packet_router_;
std::vector<std::unique_ptr<RtpVideoSenderInterface>> video_rtp_senders_
RTC_GUARDED_BY(&sequence_checker_);
RtpBitrateConfigurator bitrate_configurator_;
std::map<std::string, rtc::NetworkRoute> network_routes_
RTC_GUARDED_BY(sequence_checker_);
BandwidthEstimationSettings bwe_settings_ RTC_GUARDED_BY(sequence_checker_);
bool pacer_started_ RTC_GUARDED_BY(sequence_checker_);
TaskQueuePacedSender pacer_;
TargetTransferRateObserver* observer_ RTC_GUARDED_BY(sequence_checker_);
TransportFeedbackDemuxer feedback_demuxer_;
TransportFeedbackAdapter transport_feedback_adapter_
RTC_GUARDED_BY(sequence_checker_);
NetworkControllerFactoryInterface* const controller_factory_override_
RTC_PT_GUARDED_BY(sequence_checker_);
const std::unique_ptr<NetworkControllerFactoryInterface>
controller_factory_fallback_ RTC_PT_GUARDED_BY(sequence_checker_);
std::unique_ptr<CongestionControlHandler> control_handler_
RTC_GUARDED_BY(sequence_checker_) RTC_PT_GUARDED_BY(sequence_checker_);
std::unique_ptr<NetworkControllerInterface> controller_
RTC_GUARDED_BY(sequence_checker_) RTC_PT_GUARDED_BY(sequence_checker_);
TimeDelta process_interval_ RTC_GUARDED_BY(sequence_checker_);
struct LossReport {
uint32_t extended_highest_sequence_number = 0;
int cumulative_lost = 0;
};
std::map<uint32_t, LossReport> last_report_blocks_
RTC_GUARDED_BY(sequence_checker_);
Timestamp last_report_block_time_ RTC_GUARDED_BY(sequence_checker_);
NetworkControllerConfig initial_config_ RTC_GUARDED_BY(sequence_checker_);
StreamsConfig streams_config_ RTC_GUARDED_BY(sequence_checker_);
const bool reset_feedback_on_route_change_;
const bool add_pacing_to_cwin_;
const bool reset_bwe_on_adapter_id_change_;
FieldTrialParameter<DataRate> relay_bandwidth_cap_;
size_t transport_overhead_bytes_per_packet_ RTC_GUARDED_BY(sequence_checker_);
bool network_available_ RTC_GUARDED_BY(sequence_checker_);
RepeatingTaskHandle pacer_queue_update_task_
RTC_GUARDED_BY(sequence_checker_);
RepeatingTaskHandle controller_task_ RTC_GUARDED_BY(sequence_checker_);
DataSize congestion_window_size_ RTC_GUARDED_BY(sequence_checker_);
bool is_congested_ RTC_GUARDED_BY(sequence_checker_);
bool transport_is_ecn_capable_ = false;
// Count of feedback messages received.
int feedback_count_ RTC_GUARDED_BY(sequence_checker_) = 0;
int transport_cc_feedback_count_ RTC_GUARDED_BY(sequence_checker_) = 0;
// Protected by internal locks.
RateLimiter retransmission_rate_limiter_;
ScopedTaskSafety safety_;
};
} // namespace webrtc
#endif // CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
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