COARefTime Class

Microsoft DirectShow 9.0

COARefTime Class

The COARefTime class converts reference times between seconds and 100-nanosecond units.

This class converts between reference times that are compatible with Automation and reference times that are compatible with C/C++. Automation-compatible interfaces use double values to represent time in seconds. Other interfaces use 64-bit LONGLONG values to represent time in 100-nanosecond units. The following types are defined for these values:

typedef LONGLONG  REFERENCE_TIME;
typedef double    REFTIME;

Filters can use the COARefTime class to convert between the two formats. This class is derived from the CRefTime class.

Requirements

**  Header:** Declared in Ctlutil.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

Public Methods
COARefTime	Constructor method.
Operators
double	Converts the reference time to a double value.
REFERENCE_TIME	Retrieves the reference time as a REFERENCE_TIME value.
Operator =	Assigns a new reference time.
Operator ==	Tests for equality between two reference times.
Operator !=	Tests for inequality between two reference times.
Operator <	Tests if one reference time is less than another.
Operator >	Tests if one reference time is greater than another.
Operator <=	Tests if one reference time is less than or equal to another.
Operator >=	Tests if one reference time is greater than or equal to another.
Operator +	Adds two reference times.
Operator –	Subtracts one reference time from another.
Operator +=	Adds two reference times, and sets this object to the result.
Operator –=	Subtracts one reference time from another, and sets this object to the result.
Operator *	Multiplies a reference time.
Operator /	Divides a reference time.