BdaValidateNodeProperty function (bdasup.h)
The BdaValidateNodeProperty function validates that a node property request is associated with a specific pin.
Syntax
NTSTATUS BdaValidateNodeProperty(
[in] PIRP pIrp,
[in] PKSPROPERTY pProperty
);
Parameters
[in] pIrp
Points to the IRP for the request to validate that the current pin controls the node property at pProperty. The BDA minidriver can receive this IRP with the KSPROPERTY_BDA_RF_TUNER_FREQUENCY or KSPROPERTY_BDA_AUTODEMODULATE_START request.
[in] pProperty
Points to a KSPROPERTY structure that describes the property and request type of the property request.
Return value
Returns STATUS_SUCCESS or an appropriate error code.
Remarks
A pin method in a BDA minidriver calls the BdaValidateNodeProperty function to validate that the pin controls a specific node property after the minidriver receives the node property request from the network provider. This node property request can be, for example, a KSPROPERTY_BDA_RF_TUNER_FREQUENCY request of the KSPROPSETID_BdaFrequencyFilter property set or a KSPROPERTY_BDA_AUTODEMODULATE_START request of the KSPROPSETID_BdaAutodemodulate property set. These property sets manipulate tuner and demodulator nodes. After successfully calling BdaValidateNodeProperty, the minidriver obtains a pointer to the BDA filter from the passed IRP so that the minidriver can perform an operation on the particular node.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available on Microsoft Windows XP and later operating systems. This routine is available on the Windows 2000 platform only if Microsoft DirectX 9.0 and later is installed on that platform. |
| Target Platform | Desktop |
| Header | bdasup.h (include Bdasup.h) |
| Library | Bdasup.lib |
| IRQL | PASSIVE_LEVEL |
See also
KSPROPERTY_BDA_AUTODEMODULATE_START