1 /*
2  *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef MODULES_CONGESTION_CONTROLLER_PCC_RTT_TRACKER_H_
12 #define MODULES_CONGESTION_CONTROLLER_PCC_RTT_TRACKER_H_
13 
14 #include <vector>
15 
16 #include "api/transport/network_types.h"
17 #include "api/units/time_delta.h"
18 #include "api/units/timestamp.h"
19 
20 namespace webrtc {
21 namespace pcc {
22 
23 class RttTracker {
24  public:
25   RttTracker(TimeDelta initial_rtt, double alpha);
26   // Updates RTT estimate.
27   void OnPacketsFeedback(const std::vector<PacketResult>& packet_feedbacks,
28                          Timestamp feedback_received_time);
29   TimeDelta GetRtt() const;
30 
31  private:
32   TimeDelta rtt_estimate_;
33   double alpha_;
34 };
35 
36 }  // namespace pcc
37 }  // namespace webrtc
38 
39 #endif  // MODULES_CONGESTION_CONTROLLER_PCC_RTT_TRACKER_H_
40