1 /* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_ 12 #define WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_ 13 14 #include <list> 15 16 #include "webrtc/common_video/libyuv/include/scaler.h" 17 18 namespace webrtc { 19 class QualityScaler { 20 public: 21 struct Resolution { 22 int width; 23 int height; 24 }; 25 26 QualityScaler(); 27 void Init(int max_qp); 28 29 void ReportFramerate(int framerate); 30 void ReportEncodedFrame(int qp); 31 void ReportDroppedFrame(); 32 33 Resolution GetScaledResolution(const I420VideoFrame& frame); 34 const I420VideoFrame& GetScaledFrame(const I420VideoFrame& frame); 35 36 private: 37 class MovingAverage { 38 public: 39 MovingAverage(); 40 void AddSample(int sample); 41 bool GetAverage(size_t num_samples, int* average); 42 void Reset(); 43 44 private: 45 int sum_; 46 std::list<int> samples_; 47 }; 48 49 void AdjustScale(bool up); 50 void ClearSamples(); 51 52 Scaler scaler_; 53 I420VideoFrame scaled_frame_; 54 55 size_t num_samples_; 56 int low_qp_threshold_; 57 MovingAverage average_qp_; 58 MovingAverage framedrop_percent_; 59 60 int downscale_shift_; 61 }; 62 63 } // namespace webrtc 64 65 #endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_ 66
