1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 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. 9 */ 10 #ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ 11 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ 12 13 #include <list> 14 15 #include "webrtc/base/constructormagic.h" 16 #include "webrtc/common_types.h" 17 #include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h" 18 19 namespace webrtc { 20 21 class OveruseEstimator { 22 public: 23 explicit OveruseEstimator(const OverUseDetectorOptions& options); 24 ~OveruseEstimator(); 25 26 // Update the estimator with a new sample. The deltas should represent deltas 27 // between timestamp groups as defined by the InterArrival class. 28 // |current_hypothesis| should be the hypothesis of the over-use detector at 29 // this time. 30 void Update(int64_t t_delta, double ts_delta, int size_delta, 31 BandwidthUsage current_hypothesis); 32 33 // Returns the estimated noise/jitter variance in ms^2. var_noise()34 double var_noise() const { 35 return var_noise_; 36 } 37 38 // Returns the estimated inter-arrival time delta offset in ms. offset()39 double offset() const { 40 return offset_; 41 } 42 43 // Returns the number of deltas which the current over-use estimator state is 44 // based on. num_of_deltas()45 unsigned int num_of_deltas() const { 46 return num_of_deltas_; 47 } 48 49 private: 50 double UpdateMinFramePeriod(double ts_delta); 51 void UpdateNoiseEstimate(double residual, double ts_delta, bool stable_state); 52 53 // Must be first member variable. Cannot be const because we need to be 54 // copyable. 55 OverUseDetectorOptions options_; 56 uint16_t num_of_deltas_; 57 double slope_; 58 double offset_; 59 double prev_offset_; 60 double E_[2][2]; 61 double process_noise_[2]; 62 double avg_noise_; 63 double var_noise_; 64 std::list<double> ts_delta_hist_; 65 66 RTC_DISALLOW_COPY_AND_ASSIGN(OveruseEstimator); 67 }; 68 } // namespace webrtc 69 70 #endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ 71