CRefTime Class (Windows Embedded CE 6.0)

1/6/2010

This class is used to manage reference times. It shares the same data layout as the REFERENCE_TIME data type, but adds some (nonvirtual) functions that provide simple comparison, conversion, and arithmetic capabilities.

A reference time is a unit of time represented in 100-nanosecond units. This time unit is the same time unit used by the Win32 FILETIME structure, although the two types cannot be interchanged.

The time represented by REFERENCE_TIME is not the time elapsed since 1/1/1601. It is either stream time or reference time, depending on the context.

Data Members

Member	Description
m_time	REFERENCE_TIME value of this object.

Member Functions

Member function	Description
CRefTime	Constructs a CRefTime object.
GetUnits	Returns the reference time in units of 100 nanoseconds.
Millisecs	Returns the reference time in milliseconds.

Operators

Operator	Description
operator (REFERENCE_TIME)	Casts the CRefTime object to a REFERENCE_TIME data type. The result is the m_time value.
operator =	Implements the copy constructor for the CRefTime class.
operator +=	Adds two CRefTime objects and makes this object equal to the result.
operator –=	Subtracts one CRefTime object from another CRefTime object and makes this object equal to the result.

Requirements

Windows Embedded CE	Windows CE 2.12 and later
Note	Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment

See Also

Reference

DirectShow Classes