KSPROPERTY_CAMERACONTROL_EXPOSURE
User-mode clients use the KSPROPERTY_CAMERACONTROL_EXPOSURE property to get or set a digital camera's exposure time. This property is optional.
Usage Summary Table
| Get | Set | Target | Property Descriptor Type | Property Value Type |
|---|---|---|---|---|
| Yes | Yes | Filter or node | KSPROPERTY_CAMERACONTROL_S or KSPROPERTY_CAMERACONTROL_NODE_S | LONG |
The property value (operation data) is a LONG that specifies the length of exposure.
This value is expressed in log base 2 seconds, thus, for values less than zero, the exposure time is 1/2n seconds. For positive values and zero, the exposure time is 2n seconds. For example:
| Value | Seconds |
|---|---|
| -7 | 1/128 |
| -6 | 1/64 |
| -5 | 1/32 |
| -4 | 1/16 |
| -3 | 1/8 |
| -2 | 1/4 |
| -1 | 1/2 |
| 0 | 1 |
| 1 | 2 |
Remarks
The Value member of the KSPROPERTY_CAMERACONTROL_S structure specifies the length of exposure.
Every video capture minidriver that supports this property must define its own range and default value for this property.
Requirements
Header: ksmedia.h (include Ksmedia.h)
See also
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