private DirectInputHardwareSupportModule(Mediator mediator, DIDeviceMonitor deviceMonitor)
: this()
{
_mediator = mediator ?? throw new ArgumentNullException(nameof(mediator));
_deviceMonitor = deviceMonitor ?? throw new ArgumentNullException(nameof(deviceMonitor));
CreateSignals(out _buttons, out _axes, out _povs);
_mediator.PhysicalControlStateChanged += _mediator_PhysicalControlStateChanged;
}
/// <summary>
/// Gets the maximum number of PPJoy virtual devices that can exist on the system, taking into account the
/// number of non-virtual joysticks already registered. This accounts for the Windows limitation of 16
/// joystick devices on the system at any given time.
/// </summary>
/// <returns>an int specifying the maximum number of virtual devices that can exist on the system.</returns>
public static int GetMaxPPJoyVirtualDevicesAllowed()
{
var maxDevices = VirtualJoystick.MaxVirtualDevices;
//start with the assumption we can actually create the maximum
//number of virtual joysticks that PPJoy itself can support,
//regardless of Windows limitations
IList <DeviceInstance> detectedJoysticks = null;
using (var directInput = new DirectInput())
{
//get a list of devices currently registered with DirectInput
detectedJoysticks = directInput.GetDevices(DeviceClass.GameController, DeviceEnumerationFlags.AllDevices);
}
//for each detected device, determine if the device is a Physical (non-Virtual) device.
//NOTE: even PPJoy non-virtual devices are considered physical devices.
foreach (DeviceInstance instance in detectedJoysticks)
{
DIDeviceMonitor dev = null;
try
{
var deviceInfo = new DIPhysicalDeviceInfo(instance.InstanceGuid, instance.InstanceName);
dev = DIDeviceMonitor.GetInstance(deviceInfo, null, VirtualJoystick.MinAnalogDataSourceVal,
VirtualJoystick.MaxAnalogDataSourceVal);
var productId = dev.VendorIdentityProductId;
if (productId.HasValue)
{
var isVirtual = false;
try
{
isVirtual = new DeviceManager().IsVirtualDevice(productId.Value);
}
catch (DeviceNotFoundException e)
{
_log.Debug(e.Message, e);
}
if (!isVirtual)
{
maxDevices--; //a non-virtual device occupies a potential slot
}
else
{
dev.Dispose();
}
}
}
catch { }
}
return(maxDevices);
}
