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KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH_S structure (ksmedia.h)

  • Article

The KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH_S structure returns filter-specific data requested using the KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH property.

Syntax

typedef struct {
  KSPROPERTY Property;
  LONG       lOcularFocalLength;
  LONG       lObjectiveFocalLengthMin;
  LONG       lObjectiveFocalLengthMax;
} KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH_S, *PKSPROPERTY_CAMERACONTROL_FOCAL_LENGTH_S;

Members

Property

Specifies an initialized KSPROPERTY structure that describes the property set, property ID, and request type.

lOcularFocalLength

Specifies a value of type LONG containing the focal length of the lens closest to the camera user.

lObjectiveFocalLengthMin

Specifies a value of type LONG containing the minimum focal length of the lens closest to the camera subject.

lObjectiveFocalLengthMax

Specifies a value of type LONG containing the maximum focal length of the lens closest to the camera subject.

Remarks

If the camera has only one lens, these values can be used to represent zoom ratios. See KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH.

Requirements

Requirement Value
Header ksmedia.h (include Ksmedia.h)

See also

KSPROPERTY

KSPROPERTY_CAMERACONTROL_FOCAL_LENGTH

KSPROPERTY_CAMERACONTROL_NODE_FOCAL_LENGTH_S

PROPSETID_VIDCAP_CAMERACONTROL