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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 WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
#include <list>
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
#include "webrtc/typedefs.h"
namespace webrtc {
enum RateControlRegion;
bool AdaptiveThresholdExperimentIsEnabled();
class OveruseDetector {
public:
explicit OveruseDetector(const OverUseDetectorOptions& options);
virtual ~OveruseDetector();
// 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);
void InitializeExperiment();
const bool in_experiment_;
double k_up_;
double k_down_;
double overusing_time_threshold_;
// Must be first member variable. Cannot be const because we need to be
// copyable.
webrtc::OverUseDetectorOptions options_;
double threshold_;
int64_t last_update_ms_;
double prev_offset_;
double time_over_using_;
int overuse_counter_;
BandwidthUsage hypothesis_;
RTC_DISALLOW_COPY_AND_ASSIGN(OveruseDetector);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
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