718a763d59
Introduce a new method I420Buffer::CropAndScale, and a static convenience helper I420Buffer::CenterCropAndScale. Use them for almost all scaling needs. Delete the Scaler class and the cricket::VideoFrame::Stretch* methods. BUG=webrtc:5682 R=pbos@webrtc.org, perkj@webrtc.org, stefan@webrtc.org Review URL: https://codereview.webrtc.org/2020593002 . Cr-Commit-Position: refs/heads/master@{#13110}
76 lines
2.2 KiB
C++
76 lines
2.2 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/include/i420_buffer_pool.h"
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#include "webrtc/modules/video_coding/utility/moving_average.h"
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namespace webrtc {
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class QualityScaler {
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public:
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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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int high_qp_threshold,
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int initial_bitrate_kbps,
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int width,
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int height,
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int fps);
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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 OnEncodeFrame(int width, int height);
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Resolution GetScaledResolution() const;
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rtc::scoped_refptr<VideoFrameBuffer> GetScaledBuffer(
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const rtc::scoped_refptr<VideoFrameBuffer>& frame);
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int downscale_shift() const { return downscale_shift_; }
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// QP is obtained from VP8-bitstream for HW, so the QP corresponds to the
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// bitstream range of [0, 127] and not the user-level range of [0,63].
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static const int kLowVp8QpThreshold;
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static const int kBadVp8QpThreshold;
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// H264 QP is in the range [0, 51].
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static const int kLowH264QpThreshold;
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static const int kBadH264QpThreshold;
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private:
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void AdjustScale(bool up);
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void UpdateTargetResolution(int frame_width, int frame_height);
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void ClearSamples();
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void UpdateSampleCounts();
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I420BufferPool pool_;
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size_t num_samples_downscale_;
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size_t num_samples_upscale_;
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int measure_seconds_upscale_;
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MovingAverage<int> average_qp_upscale_;
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MovingAverage<int> average_qp_downscale_;
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int framerate_;
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int low_qp_threshold_;
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int high_qp_threshold_;
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MovingAverage<int> framedrop_percent_;
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Resolution res_;
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int downscale_shift_;
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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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