Struct FrameRate

A struct that stores a frame rate in Hz as a fractional number to avoid imprecision.

Namespace: Unity.LiveCapture

Assembly: Unity.LiveCapture.dll

Syntax

[Serializable]
public struct FrameRate

Constructors

FrameRate(int)

Creates a new FrameRate instance.

Declaration

public FrameRate(int frameRate)

Parameters

Type	Name	Description
int	frameRate	The frame rate in Hz.

Exceptions

Type	Condition
ArgumentOutOfRangeException	Thrown if frameRate is negative.

FrameRate(int, int, bool)

Creates a new FrameRate instance.

Declaration

public FrameRate(int numerator, int denominator, bool isDropFrame)

Parameters

Type	Name	Description
int	numerator	The fraction numerator.
int	denominator	The fraction denominator.
bool	isDropFrame	Should drop frame calculations be performed when converting between clock time and frame time using this frame rate.

Exceptions

Type	Condition
ArgumentOutOfRangeException	Thrown if numerator or Denominator is negative.

Properties

Denominator

The frame rate fraction denominator.

Declaration

public readonly int Denominator { get; }

Property Value

Type	Description
int

FrameInterval

Gets the length of time between frames in seconds.

Declaration

public readonly double FrameInterval { get; }

Property Value

Type	Description
double

IsDropFrame

Should drop frame calculations be performed when converting between clock time and frame time using this frame rate.

Declaration

public readonly bool IsDropFrame { get; }

Property Value

Type	Description
bool

Remarks

This can only be true for NTSC frame rates.

IsValid

Is the frame rate valid.

Declaration

public readonly bool IsValid { get; }

Property Value

Type	Description
bool

Numerator

The frame rate fraction numerator.

Declaration

public readonly int Numerator { get; }

Property Value

Type	Description
int

Reciprocal

Gets the reciprocal of the frame rate fraction.

Declaration

public readonly FrameRate Reciprocal { get; }

Property Value

Type	Description
FrameRate

Methods

AsDouble()

Gets the frame rate as a double.

Declaration

public readonly double AsDouble()

Returns

Type	Description
double	The frame rate in Hz.

AsFloat()

Gets the frame rate as a float.

Declaration

public readonly float AsFloat()

Returns

Type	Description
float	The frame rate in Hz.

CompareTo(object)

Compares this instance to a specified object and returns an indication of their relative values.

Declaration

public readonly int CompareTo(object obj)

Parameters

Type	Name	Description
object	obj	The object to compare with this instance.

Returns

Type	Description
int	A signed number indicating the relative values of this instance and obj. * Returns a negative value when obj is not a valid FrameRate instance or this instance is less than obj. * Returns zero when this instance is the same as obj. * Returns a positive value when this instance is greater than obj.

CompareTo(FrameRate)

Compares this instance to a specified FrameRate and returns an indication of their relative values.

Declaration

public readonly int CompareTo(FrameRate other)

Parameters

Type	Name	Description
FrameRate	other	The value to compare with this instance.

Returns

Type	Description
int	A signed number indicating the relative values of this instance and other. * Returns a negative value when this instance is less than other. * Returns zero when this instance is the same as other. * Returns a positive value when this instance is greater than other.

Equals(object)

Returns a value indicating whether this instance is equal to a specified object.

Declaration

public override readonly bool Equals(object obj)

Parameters

Type	Name	Description
object	obj	An object to compare with this instance.

Returns

Type	Description
bool	true if obj is an instance of FrameRate and equals the value of this instance; otherwise, false.

Overrides

ValueType.Equals(object)

Equals(FrameRate)

Returns a value indicating whether this instance is equal to a specified FrameRate.

Declaration

public readonly bool Equals(FrameRate other)

Parameters

Type	Name	Description
FrameRate	other	A value to compare with this instance.

Returns

Type	Description
bool	true if other has the same value as this instance; otherwise, false.

GetHashCode()

Returns the hash code for this instance.

Declaration

public override readonly int GetHashCode()

Returns

Type	Description
int	The hash code for this instance.

Overrides

ValueType.GetHashCode()

IsFactorOf(FrameRate)

Checks if this FrameRate is a factor of another.

Declaration

public readonly bool IsFactorOf(FrameRate other)

Parameters

Type	Name	Description
FrameRate	other	The frame rate to compare against.

Returns

Type	Description
bool	true if this frame rate is a factor of other; otherwise, false.

Remarks

This is based on the time between frames, so 48 fps is considered a factor of 24 fps.

IsMultipleOf(FrameRate)

Checks if this FrameRate is a multiple of another.

Declaration

public readonly bool IsMultipleOf(FrameRate other)

Parameters

Type	Name	Description
FrameRate	other	The frame rate to compare against.

Returns

Type	Description
bool	true if this frame rate is a multiple of other; otherwise, false.

Remarks

This is based on the time between frames, so 24 fps is considered a multiple of 48 fps.

IsNtsc(int, int)

Checks if a frame rate is an NTSC frame rate (23.976, 29.970, 59.94).

Declaration

public static bool IsNtsc(int numerator, int denominator)

Parameters

Type	Name	Description
int	numerator	The frame rate fraction numerator.
int	denominator	The frame rate fraction denominator.

Returns

Type	Description
bool	true if the given fraction corresponds to an NTSC frame rate; otherwise, false.

ToString()

Returns a string that represents the current instance.

Declaration

public override readonly string ToString()

Returns

Type	Description
string	A string that represents the current instance.

Overrides

ValueType.ToString()

Operators

operator /(FrameRate, FrameRate)

Computes the division of two FrameRate values.

Declaration

public static FrameRate operator /(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The dividend.
FrameRate	b	The divisor.

Returns

Type	Description
FrameRate	The quotient.

Exceptions

Type	Condition
OverflowException	Thrown if the resulting frame rate is not representable using the FrameRate type.

operator ==(FrameRate, FrameRate)

Indicates whether two specified instances of FrameRate are equal.

Declaration

public static bool operator ==(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a and b have the same value; otherwise, false.

explicit operator double(FrameRate)

Gets the value of a FrameRate in Hz as a double.

Declaration

public static explicit operator double(FrameRate rate)

Parameters

Type	Name	Description
FrameRate	rate	The value to cast.

Returns

Type	Description
double	The frame rate in Hz.

explicit operator float(FrameRate)

Gets the value of a FrameRate in Hz as a float.

Declaration

public static explicit operator float(FrameRate rate)

Parameters

Type	Name	Description
FrameRate	rate	The value to cast.

Returns

Type	Description
float	The frame rate in Hz.

operator >(FrameRate, FrameRate)

Indicates whether one specified FrameRate is greater than another specified FrameRate.

Declaration

public static bool operator >(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a is greater than b; otherwise, false.

operator >=(FrameRate, FrameRate)

Indicates whether one specified FrameRate is greater than or the same as another specified FrameRate.

Declaration

public static bool operator >=(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a is greater than or the same as b; otherwise, false.

implicit operator FrameRate(StandardFrameRate)

Gets the FrameRate that corresponds to a StandardFrameRate value.

Declaration

public static implicit operator FrameRate(StandardFrameRate rate)

Parameters

Type	Name	Description
StandardFrameRate	rate	The standard frame rate.

Returns

Type	Description
FrameRate	The standard frame rate value.

operator !=(FrameRate, FrameRate)

Indicates whether two specified instances of FrameRate are not equal.

Declaration

public static bool operator !=(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a and b do not have the same value; otherwise, false.

operator <(FrameRate, FrameRate)

Indicates whether one specified FrameRate is less than another specified FrameRate.

Declaration

public static bool operator <(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a is less than b; otherwise, false.

operator <=(FrameRate, FrameRate)

Indicates whether one specified FrameRate is less than or the same as another specified FrameRate.

Declaration

public static bool operator <=(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first instance to compare.
FrameRate	b	The second instance to compare.

Returns

Type	Description
bool	true if a is less than or the same as b; otherwise, false.

operator *(FrameRate, FrameRate)

Computes the multiple of two FrameRate values.

Declaration

public static FrameRate operator *(FrameRate a, FrameRate b)

Parameters

Type	Name	Description
FrameRate	a	The first operand.
FrameRate	b	The second operand.

Returns

Type	Description
FrameRate	The multiplied frame rate.

Exceptions

Type	Condition
OverflowException	Thrown if the resulting frame rate is not representable using the FrameRate type.

Extension Methods

StandardFrameRateExtensions.TryGetStandardRate(FrameRate, out StandardFrameRate)