bb547203bf
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
|
|
* Copyright (c) 2016 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 WEBRTC_VIDEO_QUALITY_THRESHOLD_H_
|
|
#define WEBRTC_VIDEO_QUALITY_THRESHOLD_H_
|
|
|
|
#include <memory>
|
|
|
|
#include "webrtc/api/optional.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class QualityThreshold {
|
|
public:
|
|
// Both thresholds are inclusive, i.e. measurement >= high signifies a high
|
|
// state, while measurement <= low signifies a low state.
|
|
QualityThreshold(int low_threshold,
|
|
int high_threshold,
|
|
float fraction,
|
|
int max_measurements);
|
|
|
|
void AddMeasurement(int measurement);
|
|
rtc::Optional<bool> IsHigh() const;
|
|
rtc::Optional<double> CalculateVariance() const;
|
|
rtc::Optional<double> FractionHigh(int min_required_samples) const;
|
|
|
|
private:
|
|
const std::unique_ptr<int[]> buffer_;
|
|
const int max_measurements_;
|
|
const float fraction_;
|
|
const int low_threshold_;
|
|
const int high_threshold_;
|
|
int until_full_;
|
|
int next_index_;
|
|
rtc::Optional<bool> is_high_;
|
|
int sum_;
|
|
int count_low_;
|
|
int count_high_;
|
|
int num_high_states_;
|
|
int num_certain_states_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_VIDEO_QUALITY_THRESHOLD_H_
|