Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Time Base Functions / Working With Time Base Values

GetTimeBaseRate

The GetTimeBaseRate function allows your application to retrieve the rate of a time base.

Rates may be set to negative values. Negative rates cause time to move backward for the time base.

pascal Fixed GetTimeBaseRate (TimeBase tb);

tb

Specifies the time base for this operation. Your application obtains this time base identifier from the NewTimeBase function (described on page 2-297).

DESCRIPTION

The GetTimeBaseRate function returns the current rate of the time base as a fixed-point number. This rate value may be nonzero even if the time base has stopped, because it has reached its stop time.

ERROR CODES

None