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/*++
Module Name:
device.c - Device handling events for example driver.
Abstract:
This file contains the device entry points and callbacks.
Environment:
User-mode Driver Framework 2
--*/
#include "driver.h"
#include "device.tmh"
GUID CAMERA_CATEGORY = { STATIC_KSCATEGORY_VIDEO_CAMERA };
GUID CAPTURE_CATEGORY = { STATIC_KSCATEGORY_CAPTURE };
GUID VIDEO_CATEGORY = { STATIC_KSCATEGORY_VIDEO };
NTSTATUS
SimpleMediaSourceDriverCreateDevice(
_Inout_ PWDFDEVICE_INIT DeviceInit
)
/*++
Routine Description:
Worker routine called to create a device and its software resources.
Arguments:
DeviceInit - Pointer to an opaque init structure. Memory for this
structure will be freed by the framework when the WdfDeviceCreate
succeeds. So don't access the structure after that point.
Return Value:
NTSTATUS
--*/
{
WDF_OBJECT_ATTRIBUTES deviceAttributes;
PDEVICE_CONTEXT deviceContext;
WDFDEVICE device;
NTSTATUS status;
UNICODE_STRING szReference;
RtlInitUnicodeString(&szReference, L"CustomCameraSource"); // Needs to match the ReferenceString in INF
WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&deviceAttributes, DEVICE_CONTEXT);
status = WdfDeviceCreate(&DeviceInit, &deviceAttributes, &device);
if (NT_SUCCESS(status)) {
//
// Get a pointer to the device context structure that we just associated
// with the device object. We define this structure in the device.h
// header file. DeviceGetContext is an inline function generated by
// using the WDF_DECLARE_CONTEXT_TYPE_WITH_NAME macro in device.h.
// This function will do the type checking and return the device context.
// If you pass a wrong object handle it will return NULL and assert if
// run under framework verifier mode.
//
deviceContext = DeviceGetContext(device);
//
// Initialize the context.
//
deviceContext->PrivateDeviceData = 0;
//
// Create a device interface so that applications can find and talk
// to us.
//
status = WdfDeviceCreateDeviceInterface(
device,
&CAMERA_CATEGORY,
&szReference // ReferenceString
);
if (NT_SUCCESS(status)) {
status = WdfDeviceCreateDeviceInterface(
device,
&CAPTURE_CATEGORY,
&szReference // ReferenceString
);
}
if (NT_SUCCESS(status)) {
status = WdfDeviceCreateDeviceInterface(
device,
&VIDEO_CATEGORY,
&szReference // ReferenceString
);
}
if (NT_SUCCESS(status)) {
//
// Initialize the I/O Package and any Queues
//
status = SimpleMediaSourceDriverQueueInitialize(device);
}
}
return status;
}
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