Working With Time Base Values(IM:Q)

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Working With Time Base Values
Every time base contains a rate, a start time, a stop time, a current time, and some status information. The Movie Toolbox provides a number of functions that allow your application to work with the contents of a time base. This section describes those functions.
The GetTimeBaseTime function lets you retrieve the current time value of a time base. You can set the current time value by calling the SetTimeBaseTime function--this function requires you to provide a time structure. Alternatively, you can set the current time based on a time value by calling the SetTimeBaseValue function.
You can determine the rate of a time base by calling the GetTimeBaseRate function. You can set the rate of a time base by calling the SetTimeBaseRate function. You can determine the effective rate of a specified time base (relative to the master time base to which it is subordinate) by calling the GetTimeBaseEffectiveRate function.
You can retrieve the start time of a time base by calling the GetTimeBaseStartTime function. You can set the start time of a time base by calling the SetTimeBaseStartTime function. Similarly, you can use
the GetTimeBaseStopTime and SetTimeBaseStopTime functions to work with the stop time of a time base.
The Movie Toolbox provides functions that allow you to work with the status information of a time base. The GetTimeBaseStatus function allows you to read the current status of a time base. The GetTimeBaseFlags function helps you obtain the control flags of a time base. You can set these flags by calling the SetTimeBaseFlags function.

Subtopics

SetTimeBaseTime

SetTimeBaseValue

GetTimeBaseTime

SetTimeBaseRate

GetTimeBaseRate

GetTimeBaseEffectiveRate

SetTimeBaseStartTime

GetTimeBaseStartTime

SetTimeBaseStopTime

GetTimeBaseStopTime

SetTimeBaseFlags

GetTimeBaseFlags

GetTimeBaseStatus