RateCounter Class Reference

Frame rate measurement counter with selectable averaging window. More...

#include <cvb/utilities/rate_counter.hpp>

Public Member Functions
	RateCounter ()
	Constructor for a rate counter object for multi-CPU architectures with default averaging window size (25). More...
	RateCounter (int windowSize)
	Constructor for a rate counter object for multi-CPU architectures. More...
	RateCounter (int windowSize, StopWatchMode mode)
	Constructor for a rate counter object. More...
StopWatchMode	Mode () const noexcept
	The stop watch mode used internally. More...
int	WindowSize () const noexcept
	Gets the currently used averaging window size. More...
void	SetWindowSize (int windowSize)
	Sets the currently used averaging window size. More...
std::chrono::milliseconds	AverageTimeSpan () const noexcept
	Average time span between two steps or since the creation of the counter or the most recent reset. More...
double	Rate () const noexcept
	Returns the rate(1 / s) at which the steps occurred. More...
int	NumSteps () const noexcept
	Number of steps called since construction or since last reset. More...
void	Reset () noexcept
	Erase all measurements so far. More...
void	Step () noexcept
	Reading step (first reading step will not yield a measurement result, but define the starting point). More...

Static Public Member Functions
static std::unique_ptr< RateCounter >	Create ()
	Creates a frame counter object for multi CPU with default averaging window (25). More...
static std::unique_ptr< RateCounter >	Create (int windowSize)
	Creates a frame counter object for multi CPU. More...
static std::unique_ptr< RateCounter >	Create (int windowSize, StopWatchMode mode)
	Creates a frame counter object. More...

Static Public Attributes
static constexpr int	MinimumWindowSize = 1
	Minimal selectable averaging window size.Trying to select a smaller window will result in an exception.
static constexpr int	DefaultWindowSize = 25
	Default averaging window size.
static constexpr int	MaximumWindowSize = 65535
	Maximum selectable averaging window size. Trying to select a larger window will result in an exception.

Detailed Description

Frame rate measurement counter with selectable averaging window.

Constructor & Destructor Documentation

RateCounter() [1/3]

RateCounter ( )

inline

Constructor for a rate counter object for multi-CPU architectures with default averaging window size (25).

Exceptions

Any	exception derived from std::exception including CvbException.

RateCounter() [2/3]

RateCounter ( int  windowSize )

inlineexplicit

Constructor for a rate counter object for multi-CPU architectures.

Parameters

[in]

windowSize

Averaging window (i.e. number of measurements over which to average).

Exceptions

Any	exception derived from std::exception including CvbException.

RateCounter() [3/3]

RateCounter ( int  windowSize, StopWatchMode  mode  )

inline

Constructor for a rate counter object.

Parameters

[in]	windowSize	Averaging window (i.e. number of measurements over which to average).
[in]	mode	Mode to use.

Exceptions

Any	exception derived from std::exception including CvbException.

Member Function Documentation

AverageTimeSpan()

std::chrono::milliseconds AverageTimeSpan ( ) const

inlinenoexcept

Average time span between two steps or since the creation of the counter or the most recent reset.

Returns

The average time span or null if not enough measurements exist.

Exceptions

Does	not throw any exception.

Create() [1/3]

static std::unique_ptr< RateCounter > Create ( )

inlinestatic

Creates a frame counter object for multi CPU with default averaging window (25).

Returns

A pointer to a rate counter.

Exceptions

Any	exception derived from std::exception including CvbException.

Create() [2/3]

static std::unique_ptr< RateCounter > Create ( int  windowSize )

inlinestatic

Creates a frame counter object for multi CPU.

Parameters

[in]

windowSize

Averaging window (i.e. number of measurements to be averaged over).

Returns

A pointer to a rate counter.

Exceptions

Any	exception derived from std::exception including CvbException.

Create() [3/3]

static std::unique_ptr< RateCounter > Create ( int  windowSize, StopWatchMode  mode  )

inlinestatic

Creates a frame counter object.

Parameters

[in]	windowSize	Averaging window (i.e. number of measurements over which to average).
[in]	mode	Mode to use.

Returns

A pointer to a rate counter.

Exceptions

Any	exception derived from std::exception including CvbException.

Mode()

StopWatchMode Mode ( ) const

inlinenoexcept

The stop watch mode used internally.

Returns

Mode of the rate counter.

Exceptions

Does	not throw any exception.

NumSteps()

int NumSteps ( ) const

inlinenoexcept

Number of steps called since construction or since last reset.

Returns

Number of steps.

Exceptions

Does	not throw any exception.

Rate()

double Rate ( ) const

inlinenoexcept

Returns the rate(1 / s) at which the steps occurred.

Returns

The rate(1/s) at which the steps

Exceptions

Does	not throw any exception.

Reset()

void Reset ( )

inlinenoexcept

Erase all measurements so far.

Exceptions

Does	not throw any exception.

SetWindowSize()

void SetWindowSize ( int  windowSize )

inline

Sets the currently used averaging window size.

Parameters

[in]

windowSize

between MinimumWindowSize and MaximumWindowSize.

Exceptions

Any	exception derived from std::exception including CvbException.

Step()

void Step ( )

inlinenoexcept

Reading step (first reading step will not yield a measurement result, but define the starting point).

Exceptions

Does	not throw any exception.

WindowSize()

int WindowSize ( ) const

inlinenoexcept

Gets the currently used averaging window size.

Returns

The window size.

Exceptions

Does	not throw any exception.