NTSTATUS NTAPI WdmAudInstallDevice ( IN PDRIVER_OBJECT DriverObject )
Definition at line 16 of file entry.c.
{
    UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\wdmaud");
    UNICODE_STRING SymlinkName = RTL_CONSTANT_STRING(L"\\DosDevices\\wdmaud");
    PDEVICE_OBJECT DeviceObject;
    NTSTATUS Status;
    PWDMAUD_DEVICE_EXTENSION DeviceExtension;

    DPRINT("WdmAudInstallDevice called\n");

    Status = IoCreateDevice(DriverObject,
                            sizeof(WDMAUD_DEVICE_EXTENSION),
                            &DeviceName,
                            FILE_DEVICE_KS,
                            0,
                            FALSE,
                            &DeviceObject);

    if (!NT_SUCCESS(Status))
    {
        DPRINT1("IoCreateDevice failed with %x\n", Status);
        return Status;
    }

    /* clear device extension */
    DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
    RtlZeroMemory(DeviceExtension, sizeof(WDMAUD_DEVICE_EXTENSION));

    /* register device interfaces */
    Status = WdmAudRegisterDeviceInterface(DeviceObject, DeviceExtension);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("WdmRegisterDeviceInterface failed with %x\n", Status);
        IoDeleteDevice(DeviceObject);
        return Status;
    }

    /* initialize sysaudio device list */
    InitializeListHead(&DeviceExtension->SysAudioDeviceList);

    /* initialize client context device list */
    InitializeListHead(&DeviceExtension->WdmAudClientList);

    /* initialize spinlock */
    KeInitializeSpinLock(&DeviceExtension->Lock);

    /* find available sysaudio devices */
    Status = WdmAudOpenSysAudioDevices(DeviceObject, DeviceExtension);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("WdmAudOpenSysAudioDevices failed with %x\n", Status);
        IoDeleteSymbolicLink(&SymlinkName);
        IoDeleteDevice(DeviceObject);
        return Status;
    }
    /* allocate ks device header */
    Status = KsAllocateDeviceHeader(&DeviceExtension->DeviceHeader, 0, NULL);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("KsAllocateDeviceHeader failed with %x\n", Status);
        IoDeleteSymbolicLink(&SymlinkName);
        IoDeleteDevice(DeviceObject);
        return Status;
    }

    Status = WdmAudMixerInitialize(DeviceObject);
    DPRINT("WdmAudMixerInitialize Status %x WaveIn %lu WaveOut %lu Mixer %lu\n", Status, WdmAudGetWaveInDeviceCount(), WdmAudGetWaveOutDeviceCount(), WdmAudGetMixerDeviceCount());

    DeviceObject->Flags |= DO_DIRECT_IO | DO_POWER_PAGABLE;
    DeviceObject->Flags &= ~ DO_DEVICE_INITIALIZING;

    return STATUS_SUCCESS;
}
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