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Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Controlling Analog Video

VDGetBrightness

The VDGetBrightness function returns the current brightness value, which reflects the overall brightness of the digitized video image. Brightness values range from 0 to 65,535, where 0 is the darkest possible setting and 65,535 is the lightest possible setting.

pascal VideoDigitizerError VDGetBrightness
                                  (VideoDigitizerComponent ci,
                                     unsigned short *brightness);

ci

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

brightness

Contains a pointer to an integer that is to receive the current brightness value. The video digitizer component places the brightness value into the field referred to by this parameter.

RESULT CODES

noErr	0	No error
digiUnimpErr	-2201	Function not supported

SEE ALSO

Your application can set the brightness value by calling the VDSetBrightness function (described in the previous section). To obtain the recommended brightness value, your application can call the VDGetVideoDefaults function (described on page 8-66).

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