USBCAMD_ControlVendorCommand - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// usbcamdi.h

NTSTATUS USBCAMD_ControlVendorCommand(
  [in]                PVOID                      DeviceContext,
  [in]                UCHAR                      Request,
  [in]                USHORT                     Value,
  [in]                USHORT                     Index,
  [in, out, optional] PVOID                      Buffer,
  [in, out]           PULONG                     BufferLength,
  [in]                BOOLEAN                    GetData,
  [in, optional]      PCOMMAND_COMPLETE_FUNCTION CommandComplete,
  [in, optional]      PVOID                      CommandContext
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-usbcamdi-usbcamd_controlvendorcommand)

Description

The USBCAMD_ControlVendorCommand function sends vendor-specific commands to the control pipe.

Parameters

DeviceContext [in]

Pointer to device-specific context.

Request [in]

Specifies the value of the Request field for the vendor command.

Value [in]

Specifies the value of the Value field for the vendor command.

Index [in]

Specifies the value of the Index field for the vendor command.

Buffer [in, out, optional]

Pointer to a data buffer if the command has data. If the command does not have any data, this value is NULL.

BufferLength [in, out]

Pointer to the buffer length value. Buffer length is expressed in bytes. If the value of Buffer is NULL, BufferLength may also be NULL.

GetData [in]

GetData indicates data was sent from the device to the host.

CommandComplete [in, optional]

Pointer to a camera minidriver defined CommandCompleteFunction, which is called when the bulk read or write is completed. This value can be NULL.

CommandContext [in, optional]

Pointer to a block of memory, that is passed as an argument to the camera minidriver defined CommandCompleteFunction.

Return value

USBCAMD_ControlVendorCommand returns the NTSTATUS code from vendor command.

Other possible error codes include:

Return code Description
STATUS_PENDING The vendor command is deferred.
STATUS_INSUFFICIENT_RESOURCES There are insufficient resources to allocate the vendor command.

Remarks

This function may be called at IRQL >= PASSIVE_LEVEL. If the function is called at IRQL > PASSIVE_LEVEL, the command is deferred. After completion, the camera minidriver defined CommandCompleteFunction is called and passed the value in the CommandContext argument.

See also

CommandCompleteFunction

View the official Windows Driver Kit DDI reference

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