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/*
* Copyright (c) 2019 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 API_NETWORK_STATE_PREDICTOR_H_
#define API_NETWORK_STATE_PREDICTOR_H_
#include <memory>
#include <vector>
namespace webrtc {
enum class BandwidthUsage {
kBwNormal = 0,
kBwUnderusing = 1,
kBwOverusing = 2,
kLast
};
// TODO(yinwa): work in progress. API in class NetworkStatePredictor should not
// be used by other users until this comment is removed.
// NetworkStatePredictor predict network state based on current network metrics.
// Usage:
// Setup by calling Initialize.
// For each update, call Update. Update returns network state
// prediction.
class NetworkStatePredictor {
public:
virtual ~NetworkStatePredictor() {}
// Returns current network state prediction.
// Inputs: send_time_ms - packet send time.
// arrival_time_ms - packet arrival time.
// network_state - computed network state.
virtual BandwidthUsage Update(int64_t send_time_ms,
int64_t arrival_time_ms,
BandwidthUsage network_state) = 0;
};
class NetworkStatePredictorFactoryInterface {
public:
virtual std::unique_ptr<NetworkStatePredictor>
CreateNetworkStatePredictor() = 0;
virtual ~NetworkStatePredictorFactoryInterface() = default;
};
} // namespace webrtc
#endif // API_NETWORK_STATE_PREDICTOR_H_
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