CRefTime Class
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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. Note that the time a REFERENCE_TIME represents 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
DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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Last updated on Wednesday, April 13, 2005
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