Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Selecting an Input Source

VDGetInput

The VDGetInput function returns data that identifies the currently active input video source.

All video digitizer components must support this function.

pascal VideoDigitizerError VDGetInput (VideoDigitizerComponent ci,
                                        short *input);

ci

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

input

Contains a pointer to a short integer that is to receive the identifier for the currently active input video source. Video digitizer components number video sources sequentially, starting at 0. So, if the first source is active, this function sets the field referred to by the input parameter to 0.

RESULT CODES

noErr	0	No error
qtParamErr	-2202	Invalid parameter value

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