COARefTime Class
The COARefTime class converts between the Automation-compatible REFTIME type and the REFERENCE_TIME type used within and between filters.
Time parameters within the control interfaces are represented as double values, containing a fractional number of seconds. Interfaces supported between and within filters use a 64-bit LONGLONG type containing the time in 100-nanosecond units. Filters use this class to convert between the two formats. It is derived from CRefTime and thus is a LONGLONG, but it can be constructed from and assigned double values.
COARefTime Constructs a COARefTime object.
double Retrieves the reference time as a double value. Operator = Copy constructor for the COARefTime class. Operator == Tests for equality between COARefTime objects. Operator != Tests for inequality between COARefTime objects. Operator < Tests if one COARefTime object is less than another COARefTime object. Operator > Tests if one COARefTime object is greater than another COARefTime object. Operator <= Tests if one COARefTime object is less than or equal to another COARefTime object. Operator >= Tests if one COARefTime object is greater than or equal to another COARefTime object. Operator + Adds two COARefTime objects. Operator – Subtracts one COARefTime object from another COARefTime object. Operator += Adds two COARefTime objects and makes this object equal to the result. Operator –= Subtracts one COARefTime object from another COARefTime object and makes this object equal to the result. Operator * Multiplies two COARefTime objects. Operator / Divides one COARefTime object by another COARefTime object.
COARefTime::COARefTime
COARefTime Class
Constructs a COARefTime object.
Syntax
COARefTime(
CRefTime t
);
COARefTime(
REFERENCE_TIME t
);
COARefTime(
double d
);
Parameters
- t
- CRefTime value or REFERENCE_TIME value passed through to the class. Units are 100 nanoseconds.
- d
- A double value that constructs the COARefTime class. Units in this case are (fractional) seconds.
Return Value
No return value.
COARefTime::double
COARefTime Class
Retrieves the reference time as a double value, converted from 100-nanosecond units to seconds.
Syntax
operator double();
Return Value
Returns the reference time as a double value.
COARefTime::Operator =
COARefTime Class
Copy constructor for a COARefTime object.
Syntax
COARefTime& operator=(
const double& rd
);
Parameters
- rd
- A double value that constructs a COARefTime object.
Return Value
No return value.
COARefTime::Operator ==
COARefTime Class
Tests for equality between COARefTime objects.
Syntax
BOOL operator==(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is equal to this object or FALSE otherwise.
Remarks
This object is on the left side of the operator.
COARefTime::Operator !=
COARefTime Class
Tests for inequality between COARefTime objects.
Syntax
BOOL operator!=(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is not equal to this object; otherwise, returns FALSE.
Remarks
This object is on the left side of the operator.
COARefTime::Operator <
COARefTime Class
Tests if one COARefTime object is less than another COARefTime object.
Syntax
BOOL operator < (
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is less than this object; otherwise, returns FALSE.
Remarks
This object is on the left side of the operator.
COARefTime::Operator >
COARefTime Class
Tests if one COARefTime object is greater than another COARefTime object.
Syntax
BOOL operator > (
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is greater than this object; otherwise, returns FALSE.
Remarks
This object is on the left side of the operator.
COARefTime::Operator >=
COARefTime Class
Tests if one COARefTime object is greater than or equal to another COARefTime object.
Syntax
BOOL operator >= (
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is greater than or equal to this object; otherwise, returns FALSE.
Remarks
This object is on the left side of the operator.
COARefTime::Operator <=
COARefTime Class
Tests if one COARefTime object is less than or equal to another COARefTime object.
Syntax
BOOL operator <= (
const COARefTime& rt
);
Parameters
- rt
- COARefTime object corresponding to the right side of the operator.
Return Value
Returns TRUE if the COARefTime object tested is less than or equal to this object; otherwise, returns FALSE.
Remarks
This object is on the left side of the operator.
COARefTime::Operator +
COARefTime Class
Adds two COARefTime objects.
Syntax
COARefTime operator+(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object to be added.
Return Value
Returns the result of the addition.
COARefTime::Operator –
COARefTime Class
Subtracts one COARefTime object from another COARefTime object.
Syntax
COARefTime operator-(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object to be subtracted.
Return Value
Returns the result of the subtraction.
Remarks
This object is the object subtracted from.
COARefTime::Operator +=
COARefTime Class
Adds two COARefTime objects and makes this object equal to the result.
Syntax
COARefTime& operator+=(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object to be added.
Return Value
Returns the result.
COARefTime::Operator –=
COARefTime Class
Subtracts one COARefTime object from another COARefTime object and makes this object equal to the result.
Syntax
COARefTime& operator-=(
const COARefTime& rt
);
Parameters
- rt
- COARefTime object to be subtracted.
Return Value
Returns the result.
Remarks
This object is the object subtracted from.
COARefTime::Operator *
COARefTime Class
Multiplies the COARefTime object by a value.
Syntax
COARefTime operator*(
LONG l
);
Parameters
- l
- Value to multiply by.
Return Value
Returns the result.
COARefTime::Operator /
COARefTime Class
Divides one COARefTime object by a value.
Syntax
COARefTime operator/(
LONG l
);
Parameters
- l
- Value to divide by.
Return Value
Returns the result.
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