scream_network_controller.h

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/*

 *  Copyright (c) 2025 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_SCREAM_SCREAM_NETWORK_CONTROLLER_H_

#define MODULES_CONGESTION_CONTROLLER_SCREAM_SCREAM_NETWORK_CONTROLLER_H_

#include <optional>

#include "api/environment/environment.h"

#include "api/transport/network_control.h"

#include "api/transport/network_types.h"

#include "api/units/data_rate.h"

#include "api/units/time_delta.h"

#include "api/units/timestamp.h"

#include "modules/congestion_controller/scream/scream_v2.h"

#include "modules/congestion_controller/scream/scream_v2_parameters.h"

namespace webrtc {

class ScreamNetworkController : public NetworkControllerInterface {

 public:

  explicit ScreamNetworkController(NetworkControllerConfig config);

  ~ScreamNetworkController() override = default;

  NetworkControlUpdate OnNetworkAvailability(NetworkAvailability msg) override;

  NetworkControlUpdate OnNetworkRouteChange(NetworkRouteChange msg) override;

  NetworkControlUpdate OnProcessInterval(ProcessInterval msg) override;

  NetworkControlUpdate OnRemoteBitrateReport(RemoteBitrateReport msg) override;

  NetworkControlUpdate OnRoundTripTimeUpdate(RoundTripTimeUpdate msg) override;

  NetworkControlUpdate OnSentPacket(SentPacket msg) override;

  NetworkControlUpdate OnReceivedPacket(ReceivedPacket) override;

  NetworkControlUpdate OnStreamsConfig(StreamsConfig msg) override;

  NetworkControlUpdate OnTargetRateConstraints(

      TargetRateConstraints msg) override;

  NetworkControlUpdate OnTransportLossReport(TransportLossReport msg) override;

  NetworkControlUpdate OnTransportPacketsFeedback(

      TransportPacketsFeedback msg) override;

  NetworkControlUpdate OnNetworkStateEstimate(NetworkStateEstimate) override;

  bool SupportsEcnAdaptation() const override { return true; }

 private:

  NetworkControlUpdate CreateUpdate(Timestamp now,

                                    DataRate target_rate,

                                    TimeDelta rtt);

  PacerConfig CreatePacerConfig(DataRate target_rate);

  Environment env_;

  const ScreamV2Parameters params_;

  const TimeDelta default_pacing_window_;

  TimeDelta current_pacing_window_;

  std::optional<ScreamV2> scream_;

  TargetRateConstraints target_rate_constraints_;

  StreamsConfig streams_config_;

  Timestamp last_padding_interval_started_;

};

}  // namespace webrtc

#endif  // MODULES_CONGESTION_CONTROLLER_SCREAM_SCREAM_NETWORK_CONTROLLER_H_