IVPConfig Interface
This interface enables a video port (VP) or overlay mixer filter to communicate with a VP driver (decoder), to set and retrieve configuration information. This interface assumes that the mixer filter creates the video port. This interface derives from IVPBaseConfig. See also IVPBaseNotify and IVPNotify.
When to Implement
The Windows Driver Model (WDM) Ksproxy filter implements this interface so you will not need to implement it in most cases. Implement this interface when you need this functionality on a platform that does not support WDM, or when you need to alter the default behavior.
When to Use
The Overlay Mixer filter uses this interface so you will not need to use it in most cases. Use this interface when you implement your own overlay mixer filter.
Methods in Vtable Order
The following tables show the methods that appear in the Vtable beneath the standard COM methods inherited from IUnknown.
| IVPBaseConfig method | Description |
|---|---|
| GetConnectInfo | Retrieves connection information structures. |
| SetConnectInfo | Sets the index for the current video port connection information. |
| GetVPDataInfo | Retrieves the current video port data information. |
| GetMaxPixelRate | Retrieves the maximum pixels per second rate for a given width and height. |
| InformVPInputFormats | Informs the device what video formats the video port supports. |
| GetVideoFormats | Retrieves the video formats the decoder supports. |
| SetVideoFormat | Sets the format that the video will use. |
| SetInvertPolarity | Reverses the current polarity the decoder uses. |
| GetOverlaySurface | Determines whether the overlay mixer should use the driver's overlay surface and if so retrieves a pointer to the surface. |
| SetDirectDrawKernelHandle | Sets the DirectDraw kernel handle for the decoder's minidriver to use. |
| SetVideoPortID | Sets the port ID that the video will use. |
| SetDDSurfaceKernelHandle | Sets the kernel handle that the DirectDraw surface will use. |
| SetSurfaceParameters | Tells the capture driver about the surface created on its behalf by the Overlay Mixer or VBI surface filter. |
| IVPConfig method | Description |
|---|---|
| IsVPDecimationAllowed | Given the context, retrieves whether scaling at the video port is possible. |
| SetScalingFactors | Sets the factors by which the decoder should scale the video stream. |
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
See Also
Last updated on Wednesday, April 13, 2005
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