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/*
* Copyright (c) 2014 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_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
#include <list>
#include "webrtc/common_video/libyuv/include/scaler.h"
namespace webrtc {
class QualityScaler {
public:
struct Resolution {
int width;
int height;
};
QualityScaler();
void Init(int max_qp);
void ReportFramerate(int framerate);
void ReportEncodedFrame(int qp);
void ReportDroppedFrame();
Resolution GetScaledResolution(const I420VideoFrame& frame);
const I420VideoFrame& GetScaledFrame(const I420VideoFrame& frame);
private:
class MovingAverage {
public:
MovingAverage();
void AddSample(int sample);
bool GetAverage(size_t num_samples, int* average);
void Reset();
private:
int sum_;
std::list<int> samples_;
};
void AdjustScale(bool up);
void ClearSamples();
Scaler scaler_;
I420VideoFrame scaled_frame_;
size_t num_samples_;
int low_qp_threshold_;
MovingAverage average_qp_;
MovingAverage framedrop_percent_;
int downscale_shift_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
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