OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright (c) 2016 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 |
| 11 #ifndef WEBRTC_VIDEO_QUALITY_THRESHOLD_H_ |
| 12 #define WEBRTC_VIDEO_QUALITY_THRESHOLD_H_ |
| 13 |
| 14 #include <memory> |
| 15 |
| 16 #include "webrtc/base/optional.h" |
| 17 |
| 18 namespace webrtc { |
| 19 |
| 20 class QualityThreshold { |
| 21 public: |
| 22 // Both thresholds are inclusive, i.e. measurement >= high signifies a high |
| 23 // state, while measurement <= low signifies a low state. |
| 24 QualityThreshold(int low_threshold, |
| 25 int high_threshold, |
| 26 float fraction, |
| 27 int max_measurements); |
| 28 |
| 29 void AddMeasurement(int measurement); |
| 30 rtc::Optional<bool> IsHigh() const; |
| 31 rtc::Optional<double> CalculateVariance() const; |
| 32 |
| 33 private: |
| 34 const std::unique_ptr<int[]> buffer_; |
| 35 const int max_measurements_; |
| 36 const float fraction_; |
| 37 const int low_threshold_; |
| 38 const int high_threshold_; |
| 39 int until_full_; |
| 40 int next_index_; |
| 41 rtc::Optional<bool> is_high_; |
| 42 int sum_; |
| 43 int count_low_; |
| 44 int count_high_; |
| 45 }; |
| 46 |
| 47 } // namespace webrtc |
| 48 |
| 49 #endif // WEBRTC_VIDEO_QUALITY_THRESHOLD_H_ |
OLD | NEW |