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 "webrtc/common_video/libyuv/include/scaler.h" 15 #include "webrtc/modules/video_coding/utility/moving_average.h" 16 17 namespace webrtc { 18 class QualityScaler { 19 public: 20 static const int kDefaultLowQpDenominator; 21 static const int kDefaultMinDownscaleDimension; 22 struct Resolution { 23 int width; 24 int height; 25 }; 26 27 QualityScaler(); 28 void Init(int low_qp_threshold, 29 int high_qp_threshold, 30 bool use_framerate_reduction); 31 void SetMinResolution(int min_width, int min_height); 32 void ReportFramerate(int framerate); 33 void ReportQP(int qp); 34 void ReportDroppedFrame(); 35 void Reset(int framerate, int bitrate, int width, int height); 36 void OnEncodeFrame(const VideoFrame& frame); 37 Resolution GetScaledResolution() const; 38 const VideoFrame& GetScaledFrame(const VideoFrame& frame); 39 int GetTargetFramerate() const; downscale_shift()40 int downscale_shift() const { return downscale_shift_; } 41 42 private: 43 void AdjustScale(bool up); 44 void ClearSamples(); 45 46 Scaler scaler_; 47 VideoFrame scaled_frame_; 48 49 size_t num_samples_; 50 int framerate_; 51 int target_framerate_; 52 int low_qp_threshold_; 53 int high_qp_threshold_; 54 MovingAverage<int> framedrop_percent_; 55 MovingAverage<int> average_qp_; 56 Resolution res_; 57 58 int downscale_shift_; 59 int framerate_down_; 60 bool use_framerate_reduction_; 61 int min_width_; 62 int min_height_; 63 }; 64 65 } // namespace webrtc 66 67 #endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_ 68