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/*
* Copyright (c) 2013 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_ESTIMATOR_H_
#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
#include <list>
#include "webrtc/base/constructormagic.h"
#include "webrtc/common_types.h"
#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
namespace webrtc {
class OveruseEstimator {
public:
explicit OveruseEstimator(const OverUseDetectorOptions& options);
~OveruseEstimator();
// Update the estimator with a new sample. The deltas should represent deltas
// between timestamp groups as defined by the InterArrival class.
// |current_hypothesis| should be the hypothesis of the over-use detector at
// this time.
void Update(int64_t t_delta, double ts_delta, int size_delta,
BandwidthUsage current_hypothesis);
// Returns the estimated noise/jitter variance in ms^2.
double var_noise() const {
return var_noise_;
}
// Returns the estimated inter-arrival time delta offset in ms.
double offset() const {
return offset_;
}
// Returns the number of deltas which the current over-use estimator state is
// based on.
unsigned int num_of_deltas() const {
return num_of_deltas_;
}
private:
double UpdateMinFramePeriod(double ts_delta);
void UpdateNoiseEstimate(double residual, double ts_delta, bool stable_state);
// Must be first member variable. Cannot be const because we need to be
// copyable.
OverUseDetectorOptions options_;
uint16_t num_of_deltas_;
double slope_;
double offset_;
double prev_offset_;
double E_[2][2];
double process_noise_[2];
double avg_noise_;
double var_noise_;
std::list<double> ts_delta_hist_;
DISALLOW_COPY_AND_ASSIGN(OveruseEstimator);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
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