Programming with QuickTime VR

Sample Description Header Structure

A VR world contains general information about a QuickTime VR movie. For instance, a VR world contains the ID of every node in the scene. A VR world is contained in the QTVR track's sample description header, defined by the QTVRSampleDescription data type:



 
typedef struct QTVRSampleDescription {

    UInt32                              size;

    UInt32                              type;

    UInt32                              reserved1;

    UInt16                              reserved2;

    UInt16                              dataRefIndex;

    UInt32                              data;

} QTVRSampleDescription, *QTVRSampleDescriptionPtr, **QTVRSampleDescriptionHandle;

size: The size, in bytes, of the sample description header structure, including the VR world atom container contained in the data field.
type: The sample description type. For QuickTime VR movies, this type should be 'qtvr' .
reserved1: Reserved. This field must be 0.
reserved2: Reserved. This field must be 0.
dataRefIndex: Reserved. This field must be 0.
data: The VR world atom container. The sample description header structure is extended to hold this atom container.