KSPROPERTY_CAMERACONTROL_EXPOSURE_RELATIVE
The KSPROPERTY_CAMERACONTROL_EXPOSURE_RELATIVE property specifies the electronic shutter speed.
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 a camera's relative exposure setting. Step size is hardware-dependent. To determine the step size, you can make a get request on the KSPROPERTY_CAMERACONTROL_EXPOSURE property.
| Value | Description |
|---|---|
| 0 | Set the exposure time to the implementation-specific default value. |
| Positive value | Increment the exposure time by one step. |
| Negative value | Decrement the exposure time by one step. |
Remarks
When making a set request, you should provide one of the values in the preceding table in the Value member of the KSPROPERTY_CAMERACONTROL_NODE_S structure.
When making a get request, the client receives one of the values in the preceding table in the Value member of the KSPROPERTY_CAMERACONTROL_NODE_S structure. The value indicates the current exposure time setting for the camera.
Set requests will fail if the Auto-Exposure mode control is in Auto mode or Aperture Priority mode.
Requirements
Header: ksmedia.h (include Ksmedia.h)