92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VIDEO_QUALITY_THRESHOLD_H_
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#define VIDEO_QUALITY_THRESHOLD_H_
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#include <memory>
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#include "api/optional.h"
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namespace webrtc {
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class QualityThreshold {
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public:
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// Both thresholds are inclusive, i.e. measurement >= high signifies a high
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// state, while measurement <= low signifies a low state.
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QualityThreshold(int low_threshold,
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int high_threshold,
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float fraction,
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int max_measurements);
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void AddMeasurement(int measurement);
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rtc::Optional<bool> IsHigh() const;
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rtc::Optional<double> CalculateVariance() const;
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rtc::Optional<double> FractionHigh(int min_required_samples) const;
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private:
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const std::unique_ptr<int[]> buffer_;
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const int max_measurements_;
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const float fraction_;
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const int low_threshold_;
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const int high_threshold_;
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int until_full_;
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int next_index_;
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rtc::Optional<bool> is_high_;
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int sum_;
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int count_low_;
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int count_high_;
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int num_high_states_;
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int num_certain_states_;
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};
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} // namespace webrtc
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#endif // VIDEO_QUALITY_THRESHOLD_H_
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