VDSetWhiteLevelValue
The VDSetWhiteLevelValue function sets the white level value. White level values range from 0 to 65,535, where 0 represents the minimum white value and 65,535 represents the maximum white value.
pascal VideoDigitizerError VDSetWhiteLevelValue
(VideoDigitizerComponent ci,
unsigned short *whiteLevel);
ci
- Specifies the video digitizer component for the request. Applications obtain this reference from the Component Manager's
OpenComponent function.
whiteLevel
- Contains a pointer to an integer that contains the new white level value. The video digitizer component attempts to set the white level value to the value specified by this parameter. The digitizer component returns the new value, so that the application can avoid using unsupported values in future requests.
RESULT CODES
| noErr | 0 | No error |
| digiUnimpErr | -2201 | Function not supported |
| qtParamErr | -2202 | Invalid parameter value |
SEE ALSO
Applications can get the current white level value by calling the VDGetWhiteLevelValue function (described in the next section). Applications can obtain the recommended white level value by calling the VDGetVideoDefaults function (described on page 8-66).
