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Diffstat (limited to 'third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_estimator.h')
-rw-r--r-- | third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_estimator.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_estimator.h b/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_estimator.h new file mode 100644 index 0000000000..d75ae04b58 --- /dev/null +++ b/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_estimator.h @@ -0,0 +1,66 @@ +/* + * 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 MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ +#define MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ + +#include <stdint.h> + +#include <deque> + +#include "api/network_state_predictor.h" + +namespace webrtc { + +class OveruseEstimator { + public: + OveruseEstimator(); + + OveruseEstimator(const OveruseEstimator&) = delete; + OveruseEstimator& operator=(const OveruseEstimator&) = delete; + + ~OveruseEstimator() = default; + + // 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, + int64_t now_ms); + + // 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. + 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); + + int num_of_deltas_ = 0; + double slope_ = 8.0 / 512.0; + double offset_ = 0; + double prev_offset_ = 0; + double E_[2][2] = {{100.0, 0.0}, {0.0, 1e-1}}; + double process_noise_[2] = {1e-13, 1e-3}; + double avg_noise_ = 0.0; + double var_noise_ = 50.0; + std::deque<double> ts_delta_hist_; +}; +} // namespace webrtc + +#endif // MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_ |