Inside Macintosh: QuickTime Components

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Field descriptions

vdigType

Specifies the type of video digitizer component. Valid values are

vdTypeBasic

Basic video digitizer--does not support any clipping

vdTypeAlpha

Supports clipping by means of an alpha channel

vdTypeMask

Supports clipping by means of a mask plane

vdTypeKey

Supports clipping by means of key colors

inputCapabilityFlags

Specifies the capabilities of the video digitizer component with respect to the input video signal. These flags are discussed in "Capability Flags," .

outputCapabilityFlags

Specifies the capabilities of the video digitizer component with respect to the output digitized video information. These flags are discussed in "Capability Flags," .

inputCurrentFlags

Specifies the current status of the video digitizer with respect to the input video signal. These flags are discussed in "Current Flags" .

outputCurrentFlags

Specifies the current status of the video digitizer with respect to the output digitized video information. These flags are discussed in "Current Flags" .

slot

Identifies the slot that contains the video digitizer interface card.

gdh

Contains a handle to the graphics device that defines the screen to which the digitized data is to be written. Set this field to nil if your application is not constrained to a particular graphics device.

maskgdh

Contains a handle to the graphics device that contains the mask plane. This field is used only by digitizers that clip by means of mask planes.

minDestHeight

Indicates the smallest height value the digitizer component can accommodate in its destination.

minDestWidth

Indicates the smallest width value the digitizer component can accommodate in its destination.

maxDestHeight

Indicates the largest height value the digitizer component can accommodate in its destination.

maxDestWidth

Indicates the largest width value the digitizer component can accommodate in its destination.

blendLevels

Specifies the number of blend levels the video digitizer component supports.

private

Reserved. Set this field to 0.