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This 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.
Member Functions
| Member function | Description |
|---|---|
| COARefTime | Constructs a COARefTime object. |
Operators
| Operator | Description |
|---|---|
| double | Returns 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. |
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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