2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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.
11 #ifndef WEBRTC_VOICE_ENGINE_NETWORK_PREDICTOR_H_
12 #define WEBRTC_VOICE_ENGINE_NETWORK_PREDICTOR_H_
14 #include "webrtc/base/exp_filter.h"
15 #include "webrtc/system_wrappers/interface/clock.h"
21 // NetworkPredictor is to predict network conditions e.g., packet loss rate, for
22 // sender and/or receiver to cope with changes in the network condition.
23 class NetworkPredictor {
25 explicit NetworkPredictor(Clock* clock);
26 ~NetworkPredictor() {}
28 // Gets the predicted packet loss rate.
29 uint8_t GetLossRate();
31 // Updates the packet loss rate predictor, on receiving a new observation of
32 // packet loss rate from past. Input packet loss rate should be in the
34 void UpdatePacketLossRate(uint8_t loss_rate);
38 int64_t last_loss_rate_update_time_ms_;
40 // An exponential filter is used to predict packet loss rate.
41 scoped_ptr<rtc::ExpFilter> loss_rate_filter_;
46 #endif // WEBRTC_VOICE_ENGINE_NETWORK_PREDICTOR_H_