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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,
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 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 SentPacketInfo& 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,
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 NetworkRoute& old_route,
const 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 SentPacketInfo& 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, 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_maybe_support_ecn_ =
false; // True if RFC8888 has been negotiated.
bool sending_packets_as_ect1_ = 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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