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| 1 /* | 1 /* |
| 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ | 10 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ |
| 11 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ | 11 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ |
| 12 | 12 |
| 13 #include <stddef.h> | 13 #include <stddef.h> |
| 14 #include <stdint.h> | 14 #include <stdint.h> |
| 15 | 15 |
| 16 #include <deque> | 16 #include <deque> |
| 17 #include <utility> | 17 #include <utility> |
| 18 | 18 |
| 19 #include "webrtc/rtc_base/constructormagic.h" | 19 #include "webrtc/base/constructormagic.h" |
| 20 | 20 |
| 21 namespace webrtc { | 21 namespace webrtc { |
| 22 | 22 |
| 23 class TrendlineEstimator { | 23 class TrendlineEstimator { |
| 24 public: | 24 public: |
| 25 // |window_size| is the number of points required to compute a trend line. | 25 // |window_size| is the number of points required to compute a trend line. |
| 26 // |smoothing_coef| controls how much we smooth out the delay before fitting | 26 // |smoothing_coef| controls how much we smooth out the delay before fitting |
| 27 // the trend line. |threshold_gain| is used to scale the trendline slope for | 27 // the trend line. |threshold_gain| is used to scale the trendline slope for |
| 28 // comparison to the old threshold. Once the old estimator has been removed | 28 // comparison to the old threshold. Once the old estimator has been removed |
| 29 // (or the thresholds been merged into the estimators), we can just set the | 29 // (or the thresholds been merged into the estimators), we can just set the |
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| 62 double smoothed_delay_; | 62 double smoothed_delay_; |
| 63 // Linear least squares regression. | 63 // Linear least squares regression. |
| 64 std::deque<std::pair<double, double>> delay_hist_; | 64 std::deque<std::pair<double, double>> delay_hist_; |
| 65 double trendline_; | 65 double trendline_; |
| 66 | 66 |
| 67 RTC_DISALLOW_COPY_AND_ASSIGN(TrendlineEstimator); | 67 RTC_DISALLOW_COPY_AND_ASSIGN(TrendlineEstimator); |
| 68 }; | 68 }; |
| 69 } // namespace webrtc | 69 } // namespace webrtc |
| 70 | 70 |
| 71 #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ | 71 #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_TRENDLINE_ESTIMATOR_H_ |
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