| /* |
| * 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_ |