internal MacHidStream(MacHidDevice device)
: base(device)
{
_inputQueue = new Queue <byte[]>();
_outputQueue = new Queue <CommonOutputReport>();
_readThread = new Thread(ReadThread)
{
IsBackground = true, Name = "HID Reader"
};
_writeThread = new Thread(WriteThread)
{
IsBackground = true, Name = "HID Writer"
};
}
protected override bool TryCreateHidDevice(object key, out Device device)
{
device = MacHidDevice.TryCreate((NativeMethods.io_string_t)key);
return(device != null);
}
internal static MacHidDevice TryCreate(NativeMethods.io_string_t path)
{
var d = new MacHidDevice()
{
_path = path
};
var service = NativeMethods.IORegistryEntryFromPath(0, ref path).ToIOObject();
if (!service.IsSet)
{
return(null);
}
using (service)
{
int?vid = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDVendorIDKey);
int?pid = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDProductIDKey);
int?version = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDVersionNumberKey);
if (vid == null || pid == null || version == null)
{
return(null);
}
// TODO: Craft the report descriptor from IOHIDElements so we can support it below OS X 10.8...
// Also, our report sizes aren't correct for the no-report-ID case without this...
d._vid = (int)vid;
d._pid = (int)pid;
d._version = (int)version;
d._maxInput = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDMaxInputReportSizeKey) ?? 0;
d._maxOutput = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDMaxOutputReportSizeKey) ?? 0;
d._maxFeature = NativeMethods.IORegistryEntryGetCFProperty_Int(service, NativeMethods.kIOHIDMaxFeatureReportSizeKey) ?? 0;
d._manufacturer = NativeMethods.IORegistryEntryGetCFProperty_String(service, NativeMethods.kIOHIDManufacturerKey);
d._productName = NativeMethods.IORegistryEntryGetCFProperty_String(service, NativeMethods.kIOHIDProductKey);
d._serialNumber = NativeMethods.IORegistryEntryGetCFProperty_String(service, NativeMethods.kIOHIDSerialNumberKey);
d._reportDescriptor = NativeMethods.IORegistryEntryGetCFProperty_Data(service, NativeMethods.kIOHIDReportDescriptorKey);
if (d._maxInput == 0 && d._maxOutput == 0 && d._maxFeature == 0)
{
return(null);
}
// Does this device use Report IDs? Let's find out.
d._reportsUseID = false; bool hasInput = false, hasOutput = false, hasFeature = false;
using (var device = NativeMethods.IOHIDDeviceCreate(IntPtr.Zero, service).ToCFType())
{
if (!device.IsSet)
{
return(null);
}
using (var elementArray = NativeMethods.IOHIDDeviceCopyMatchingElements(device, IntPtr.Zero).ToCFType())
{
if (!elementArray.IsSet)
{
return(null);
}
int elementCount = checked ((int)NativeMethods.CFArrayGetCount(elementArray));
for (int elementIndex = 0; elementIndex < elementCount; elementIndex++)
{
var element = NativeMethods.CFArrayGetValueAtIndex(elementArray, (IntPtr)elementIndex);
if (element == IntPtr.Zero)
{
continue;
}
var elementType = NativeMethods.IOHIDElementGetType(element);
switch (elementType)
{
case NativeMethods.IOHIDElementType.InputMisc:
case NativeMethods.IOHIDElementType.InputButton:
case NativeMethods.IOHIDElementType.InputAxis:
case NativeMethods.IOHIDElementType.InputScanCodes:
hasInput = true; break;
case NativeMethods.IOHIDElementType.Output:
hasOutput = true; break;
case NativeMethods.IOHIDElementType.Feature:
hasFeature = true; break;
}
if (NativeMethods.IOHIDElementGetReportID(element) != 0)
{
d._reportsUseID = true;
}
}
}
}
if (!d._reportsUseID)
{
// It does not use Report IDs. MacOS's maximums do not include said Report ID.
if (d._maxInput != 0)
{
d._maxInput++;
}
if (d._maxOutput != 0)
{
d._maxOutput++;
}
if (d._maxFeature != 0)
{
d._maxFeature++;
}
}
if (!hasInput)
{
d._maxInput = 0;
}
if (!hasOutput)
{
d._maxOutput = 0;
}
if (!hasFeature)
{
d._maxFeature = 0;
}
}
return(d);
}