e2af622edf
- Applied smoothing of capture jitter. - Adjusted thresholds. R=stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2070005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4817 4adac7df-926f-26a2-2b94-8c16560cd09d
114 lines
3.0 KiB
C++
114 lines
3.0 KiB
C++
/*
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* Copyright (c) 2013 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_VIDEO_ENGINE_OVERUSE_FRAME_DETECTOR_H_
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#define WEBRTC_VIDEO_ENGINE_OVERUSE_FRAME_DETECTOR_H_
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#include "webrtc/modules/interface/module.h"
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#include "webrtc/system_wrappers/interface/constructor_magic.h"
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#include "webrtc/system_wrappers/interface/scoped_ptr.h"
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namespace webrtc {
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class Clock;
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class CpuOveruseObserver;
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class CriticalSectionWrapper;
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class VCMExpFilter;
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// Limits on standard deviation for under/overuse.
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#ifdef WEBRTC_LINUX
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const float kOveruseStdDevMs = 15.0f;
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const float kNormalUseStdDevMs = 7.0f;
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#elif WEBRTC_MAC
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const float kOveruseStdDevMs = 22.0f;
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const float kNormalUseStdDevMs = 12.0f;
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#else
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const float kOveruseStdDevMs = 17.0f;
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const float kNormalUseStdDevMs = 10.0f;
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#endif
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// TODO(pbos): Move this somewhere appropriate.
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class Statistics {
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public:
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Statistics();
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void AddSample(float sample_ms);
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void Reset();
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float Mean() const;
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float StdDev() const;
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uint64_t Count() const;
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private:
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float InitialMean() const;
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float InitialVariance() const;
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float sum_;
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uint64_t count_;
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scoped_ptr<VCMExpFilter> filtered_samples_;
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scoped_ptr<VCMExpFilter> filtered_variance_;
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};
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// Use to detect system overuse based on jitter in incoming frames.
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class OveruseFrameDetector : public Module {
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public:
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explicit OveruseFrameDetector(Clock* clock,
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float normaluse_stddev_ms,
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float overuse_stddev_ms);
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~OveruseFrameDetector();
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// Registers an observer receiving overuse and underuse callbacks. Set
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// 'observer' to NULL to disable callbacks.
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void SetObserver(CpuOveruseObserver* observer);
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// Called for each captured frame.
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void FrameCaptured(int width, int height);
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// Implements Module.
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virtual int32_t TimeUntilNextProcess() OVERRIDE;
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virtual int32_t Process() OVERRIDE;
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private:
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bool IsOverusing();
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bool IsUnderusing(int64_t time_now);
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// Protecting all members.
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scoped_ptr<CriticalSectionWrapper> crit_;
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// Limits on standard deviation for under/overuse.
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const float normaluse_stddev_ms_;
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const float overuse_stddev_ms_;
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// Observer getting overuse reports.
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CpuOveruseObserver* observer_;
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Clock* clock_;
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int64_t next_process_time_;
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Statistics capture_deltas_;
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int64_t last_capture_time_;
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int64_t last_overuse_time_;
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int checks_above_threshold_;
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int64_t last_rampup_time_;
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bool in_quick_rampup_;
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int current_rampup_delay_ms_;
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// Number of pixels of last captured frame.
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int num_pixels_;
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DISALLOW_COPY_AND_ASSIGN(OveruseFrameDetector);
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};
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} // namespace webrtc
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#endif // WEBRTC_VIDEO_ENGINE_OVERUSE_FRAME_DETECTOR_H_
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