Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Utility Functions

VDSetFieldPreference

The VDSetFieldPreference function allows applications to specify which field to use in cases where the vertical scaling is less than half size.

All video digitizer components must support this function.

pascal VideoDigitizerError VDSetFieldPreference
                              (VideoDigitizerComponent ci, 
                               short fieldFlag);

ci

Specifies the video digitizer component for the request. Applications obtain this reference from the Component Manager's OpenComponent function.

fieldFlag

Indicates which field to use. Valid values are

vdUseAnyField

Digitizer component decides which field to use

vdUseOddField

Digitizer uses odd field

vdUseEvenField

Digitizer uses even field

DESCRIPTION

Applications can specify that the digitizer use either the odd-line field or the even-line field; alternatively, applications can let the component decide which field to use.

RESULT CODES

noErr	0	No error
qtParamErr	-2202	Invalid parameter value

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