//// SimpleMovingAverage.cpp// libraries/shared/src//// Created by Stephen Birarda on 4/18/13.// Copyright 2013 High Fidelity, Inc.//// Distributed under the Apache License, Version 2.0.// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "SharedUtil.h"#include "SimpleMovingAverage.h" SimpleMovingAverage::SimpleMovingAverage(int numSamplesToAverage) : _numSamples(0), _lastEventTimestamp(0), _average(0.0f), _eventDeltaAverage(0.0f), WEIGHTING(1.0f / numSamplesToAverage), ONE_MINUS_WEIGHTING(1 - WEIGHTING) { } int SimpleMovingAverage::updateAverage(float sample) { if (_numSamples > 0) { _average = (ONE_MINUS_WEIGHTING * _average) + (WEIGHTING * sample); float eventDelta = (usecTimestampNow() - _lastEventTimestamp) / 1000000.0f; if (_numSamples > 1) { _eventDeltaAverage = (ONE_MINUS_WEIGHTING * _eventDeltaAverage) + (WEIGHTING * eventDelta); } else { _eventDeltaAverage = eventDelta; } } else { _average = sample; _eventDeltaAverage = 0; } _lastEventTimestamp = usecTimestampNow(); return ++_numSamples;} void SimpleMovingAverage::reset() { _numSamples = 0; _average = 0.0f; _eventDeltaAverage = 0.0f;} float SimpleMovingAverage::getEventDeltaAverage() const { return (ONE_MINUS_WEIGHTING * _eventDeltaAverage) + (WEIGHTING * ((usecTimestampNow() - _lastEventTimestamp) / 1000000.0f));} uint64_t SimpleMovingAverage::getUsecsSinceLastEvent() const { return usecTimestampNow() - _lastEventTimestamp; }
//
// SimpleMovingAverage.cpp
// libraries/shared/src
//
// Created by Stephen Birarda on 4/18/13.
// Copyright 2013 High Fidelity, Inc.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include "SharedUtil.h"
#include "SimpleMovingAverage.h"
SimpleMovingAverage::SimpleMovingAverage(int numSamplesToAverage) :
_numSamples(0),
_lastEventTimestamp(0),
_average(0.0f),
_eventDeltaAverage(0.0f),
WEIGHTING(1.0f / numSamplesToAverage),
ONE_MINUS_WEIGHTING(1 - WEIGHTING) {
}
int SimpleMovingAverage::updateAverage(float sample) {
if (_numSamples > 0) {
_average = (ONE_MINUS_WEIGHTING * _average) + (WEIGHTING * sample);
float eventDelta = (usecTimestampNow() - _lastEventTimestamp) / 1000000.0f;
if (_numSamples > 1) {
_eventDeltaAverage = (ONE_MINUS_WEIGHTING * _eventDeltaAverage) +
(WEIGHTING * eventDelta);
} else {
_eventDeltaAverage = eventDelta;
}
} else {
_average = sample;
_eventDeltaAverage = 0;
}
_lastEventTimestamp = usecTimestampNow();
return ++_numSamples;
}
void SimpleMovingAverage::reset() {
_numSamples = 0;
_average = 0.0f;
_eventDeltaAverage = 0.0f;
}
float SimpleMovingAverage::getEventDeltaAverage() const {
return (ONE_MINUS_WEIGHTING * _eventDeltaAverage) +
(WEIGHTING * ((usecTimestampNow() - _lastEventTimestamp) / 1000000.0f));
}
uint64_t SimpleMovingAverage::getUsecsSinceLastEvent() const {
return usecTimestampNow() - _lastEventTimestamp;
}