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USBCAMD_SelectAlternateInterface function (usbcamdi.h)

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The USBCAMD_SelectAlternateInterface function selects an alternate setting within the USB video streaming interface.

Syntax

NTSTATUS USBCAMD_SelectAlternateInterface(
  [in]      PVOID                       DeviceContext,
  [in, out] PUSBD_INTERFACE_INFORMATION RequestInterface
);

Parameters

[in] DeviceContext

Pointer to a device-specific context.

[in, out] RequestInterface

Pointer to a USBD_INTERFACE_INFORMATION structure initialized with the proper values for a SELECT_INTERFACE URB request. This interface structure corresponds to a single isochronous interface on the device.

Return value

USBCAMD_SelectAlternateInterface returns the status of the SELECT_INTERFACE USB bus driver request. Other possible error codes include:

Return code Description
STATUS_DEVICE_DATA_ERROR USBCAMD failed to cancel outstanding bulk/interrupt IRPs.
STATUS_INSUFFICIENT_RESOURCES There are insufficient resources to allocate the USB request block

Remarks

On successful completion, the structure pointed to by the RequestInterface argument is filled in with the information from the SELECT_INTERFACE USB bus driver request.

This function is typically called by a camera minidriver in response to a request to allocate or free bandwidth. This function should not be called when any video streams in the minidriver are open and/or actively streaming data.

Requirements

Requirement Value
Target Platform Desktop
Header usbcamdi.h (include Usbcamdi.h)
Library Usbcamd2.lib

See also

USBD_INTERFACE_INFORMATION