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/*
* Copyright (c) 2012 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_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
#define MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
#include <stdint.h>
#include "api/transport/bandwidth_usage.h"
namespace webrtc {
class OveruseDetector {
public:
OveruseDetector();
OveruseDetector(const OveruseDetector&) = delete;
OveruseDetector& operator=(const OveruseDetector&) = delete;
~OveruseDetector() = default;
// Update the detection state based on the estimated inter-arrival time delta
// offset. `timestamp_delta` is the delta between the last timestamp which the
// estimated offset is based on and the last timestamp on which the last
// offset was based on, representing the time between detector updates.
// `num_of_deltas` is the number of deltas the offset estimate is based on.
// Returns the state after the detection update.
BandwidthUsage Detect(double offset,
double timestamp_delta,
int num_of_deltas,
int64_t now_ms);
// Returns the current detector state.
BandwidthUsage State() const;
private:
void UpdateThreshold(double modified_offset, int64_t now_ms);
double threshold_ = 12.5;
int64_t last_update_ms_ = -1;
double prev_offset_ = 0.0;
double time_over_using_ = -1;
int overuse_counter_ = 0;
BandwidthUsage hypothesis_ = BandwidthUsage::kBwNormal;
};
} // namespace webrtc
#endif // MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
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