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/*
* Copyright (c) 2018 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_RTP_CONTROL_HANDLER_H_
#define MODULES_CONGESTION_CONTROLLER_RTP_CONTROL_HANDLER_H_
#include <stdint.h>
#include "absl/types/optional.h"
#include "api/sequence_checker.h"
#include "api/transport/network_types.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "rtc_base/system/no_unique_address.h"
namespace webrtc {
// This is used to observe the network controller state and route calls to
// the proper handler. It also keeps cached values for safe asynchronous use.
// This makes sure that things running on the worker queue can't access state
// in RtpTransportControllerSend, which would risk causing data race on
// destruction unless members are properly ordered.
class CongestionControlHandler {
public:
CongestionControlHandler() = default;
CongestionControlHandler(const CongestionControlHandler&) = delete;
CongestionControlHandler& operator=(const CongestionControlHandler&) = delete;
~CongestionControlHandler() = default;
void SetTargetRate(TargetTransferRate new_target_rate);
void SetNetworkAvailability(bool network_available);
void SetPacerQueue(TimeDelta expected_queue_time);
absl::optional<TargetTransferRate> GetUpdate();
private:
absl::optional<TargetTransferRate> last_incoming_;
absl::optional<TargetTransferRate> last_reported_;
bool network_available_ = true;
bool encoder_paused_in_last_report_ = false;
int64_t pacer_expected_queue_ms_ = 0;
RTC_NO_UNIQUE_ADDRESS SequenceChecker sequenced_checker_;
};
} // namespace webrtc
#endif // MODULES_CONGESTION_CONTROLLER_RTP_CONTROL_HANDLER_H_
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