6a688f5265
Prevents downscaling below 160x90 or 90x160 to gain more quality. BUG=4625 R=mflodman@webrtc.org Review URL: https://codereview.webrtc.org/1160403004. Cr-Commit-Position: refs/heads/master@{#9480}
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
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#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
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#include "webrtc/common_video/libyuv/include/scaler.h"
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#include "webrtc/modules/video_coding/utility/include/moving_average.h"
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namespace webrtc {
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class QualityScaler {
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public:
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static const int kDefaultLowQpDenominator;
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static const int kDefaultMinDownscaleDimension;
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struct Resolution {
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int width;
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int height;
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};
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QualityScaler();
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void Init(int low_qp_threshold);
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void SetMinResolution(int min_width, int min_height);
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void ReportFramerate(int framerate);
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void ReportQP(int qp);
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void ReportDroppedFrame();
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void Reset(int framerate, int bitrate, int width, int height);
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Resolution GetScaledResolution(const VideoFrame& frame);
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const VideoFrame& GetScaledFrame(const VideoFrame& frame);
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private:
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void AdjustScale(bool up);
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void ClearSamples();
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Scaler scaler_;
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VideoFrame scaled_frame_;
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size_t num_samples_;
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int low_qp_threshold_;
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MovingAverage<int> framedrop_percent_;
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MovingAverage<int> average_qp_;
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int downscale_shift_;
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int min_width_;
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int min_height_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_QUALITY_SCALER_H_
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