106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
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/*
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* Copyright (c) 2011 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_TEST_JITTER_ESTIMATE_TEST_H_
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#define WEBRTC_MODULES_VIDEO_CODING_TEST_JITTER_ESTIMATE_TEST_H_
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#include "typedefs.h"
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#include "jitter_buffer.h"
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#include "jitter_estimator.h"
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#include <cstdlib>
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#include <cmath>
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double const pi = 4*std::atan(1.0);
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class GaussDist
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{
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public:
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GaussDist(double m, double v): _mu(m), _sigma(sqrt(v)) {}
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double RandValue() // returns a single normally distributed number
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{
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double r1 = (std::rand() + 1.0)/(RAND_MAX + 1.0); // gives equal distribution in (0, 1]
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double r2 = (std::rand() + 1.0)/(RAND_MAX + 1.0);
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return _mu + _sigma * std::sqrt(-2*std::log(r1))*std::cos(2*pi*r2);
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}
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double GetAverage()
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{
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return _mu;
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}
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double GetVariance()
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{
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return _sigma*_sigma;
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}
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void SetParams(double m, double v)
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{
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_mu = m;
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_sigma = sqrt(v);
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}
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private:
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double _mu, _sigma;
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};
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class JitterEstimateTestWrapper : public webrtc::VCMJitterEstimator
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{
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public:
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JitterEstimateTestWrapper() : VCMJitterEstimator() {}
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double GetTheta() { return _theta[0]; }
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double GetVarNoise() { return _varNoise; }
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};
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class FrameSample
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{
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public:
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FrameSample() {FrameSample(0, 0, 0, false, false);}
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FrameSample(unsigned int ts, WebRtc_Word64 wallClk, unsigned int fs, bool _keyFrame, bool _resent):
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timestamp90Khz(ts), wallClockMs(wallClk), frameSize(fs), keyFrame(_keyFrame), resent(_resent) {}
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unsigned int timestamp90Khz;
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WebRtc_Word64 wallClockMs;
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unsigned int frameSize;
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bool keyFrame;
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bool resent;
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};
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class JitterEstimateTest
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{
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public:
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JitterEstimateTest(unsigned int frameRate);
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FrameSample GenerateFrameSample();
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void SetCapacity(unsigned int c);
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void SetRate(unsigned int r);
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void SetJitter(double m, double v);
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void SetFrameSizeStats(double m, double v);
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void SetKeyFrameRate(int rate);
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void SetLossRate(double rate);
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private:
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double RandUniform() { return (std::rand() + 1.0)/(RAND_MAX + 1.0); }
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unsigned int _frameRate;
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unsigned int _capacity;
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unsigned int _rate;
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GaussDist _jitter;
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//GaussDist _noResend;
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GaussDist _deltaFrameSize;
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unsigned int _prevTimestamp;
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WebRtc_Word64 _prevWallClock;
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unsigned int _nextDelay;
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double _keyFrameRate;
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unsigned int _counter;
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unsigned int _seed;
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double _lossrate;
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};
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#endif // WEBRTC_MODULES_VIDEO_CODING_TEST_JITTER_ESTIMATE_TEST_H_
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