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QTKit Data Types Reference

Overview

This chapter describes the data types and constants found in the QuickTime Kit framework.

Data Types

QTTime

Defines the value and time scale of a time.

typedef struct {     long     long            timeValue;     long                timeScale;     long                flags; }

Discussion

The QTTime structure defines the value and time scale of a time. Currently only one flag is defined:

enum {

 kQTTimeIsIndefinite = 1 << 0

};

If this flag is set in a QTTime structure, the other fields should not be used. The QTKit provides a number of functions for converting and comparing QTTime structures.

QTTimeRange

Defines a range of time.

typedef struct {     QTTime time;     QTTime duration; } QTTimeRange;

Discussion

The QTTimeRange structure defines a range of time. It is used, for instance, to specify the active segment of a movie or track. The QTKit provides a number of functions for converting and comparing QTTimeRange structures.

Availability

• Available in Mac OS X v10.3 and later.

Declared In

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