Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Selecting an Input Source

VDGetNumberOfInputs

The VDGetNumberOfInputs function returns the number of input video sources that a video digitizer component supports.

All video digitizer components must support this function.

pascal VideoDigitizerError VDGetNumberOfInputs
                                  (VideoDigitizerComponent ci,
                                    short *inputs);

ci

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

inputs

Contains a pointer to an integer that is to receive the number of input video sources supported by the specified component. Video digitizer components number video sources sequentially, starting at 0. So, if a digitizer component supports two inputs, this function sets the field referred to by the inputs parameter to 1.

RESULT CODE

noErr

0

No error

Main | Top of Section | What's New | Apple Computer, Inc. | Find It | Feedback | Help