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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 "webrtc/common_video/libyuv/include/scaler.h"
#include "webrtc/modules/video_coding/utility/include/moving_average.h"
namespace webrtc {
class QualityScaler {
public:
static const int kDefaultLowQpDenominator;
static const int kDefaultMinDownscaleDimension;
struct Resolution {
int width;
int height;
};
QualityScaler();
void Init(int low_qp_threshold,
int high_qp_threshold,
bool use_framerate_reduction);
void SetMinResolution(int min_width, int min_height);
void ReportFramerate(int framerate);
void ReportQP(int qp);
void ReportDroppedFrame();
void Reset(int framerate, int bitrate, int width, int height);
void OnEncodeFrame(const VideoFrame& frame);
Resolution GetScaledResolution() const;
const VideoFrame& GetScaledFrame(const VideoFrame& frame);
int GetTargetFramerate() const;
int downscale_shift() const { return downscale_shift_; }
private:
void AdjustScale(bool up);
void ClearSamples();
Scaler scaler_;
VideoFrame scaled_frame_;
size_t num_samples_;
int framerate_;
int target_framerate_;
int low_qp_threshold_;
int high_qp_threshold_;
MovingAverage<int> framedrop_percent_;
MovingAverage<int> average_qp_;
Resolution res_;
int downscale_shift_;
int framerate_down_;
bool use_framerate_reduction_;
int min_width_;
int min_height_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
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