int wxHIDDevice::GetCount (int nClass, int nType)
{
mach_port_t m_pPort;
//Create the mach port
wxIOCHECK(IOMasterPort(bootstrap_port, &m_pPort), "Could not create mach port");
//Dictionary that will hold first
//the matching dictionary for determining which kind of devices we want,
//then later some registry properties from an iterator (see below)
CFMutableDictionaryRef pDictionary;
//Create a dictionary
//The call to IOServiceMatching filters down the
//the services we want to hid services (and also eats the
//dictionary up for us (consumes one reference))
wxVERIFY((pDictionary = IOServiceMatching(kIOHIDDeviceKey)) != NULL );
//Here we'll filter down the services to what we want
if (nType != -1)
{
CFNumberRef pType = CFNumberCreate(kCFAllocatorDefault,
kCFNumberIntType, &nType);
CFDictionarySetValue(pDictionary, CFSTR(kIOHIDPrimaryUsageKey), pType);
CFRelease(pType);
}
if (nClass != -1)
{
CFNumberRef pClass = CFNumberCreate(kCFAllocatorDefault,
kCFNumberIntType, &nClass);
CFDictionarySetValue(pDictionary, CFSTR(kIOHIDPrimaryUsagePageKey), pClass);
CFRelease(pClass);
}
//Now get the maching services
io_iterator_t pIterator;
wxIOCHECK(IOServiceGetMatchingServices(m_pPort, pDictionary, &pIterator), "No Matching HID Services");
if(pIterator == NULL)
return 0;
//Now we iterate through them
io_object_t pObject;
int nCount = 0;
while ( (pObject = IOIteratorNext(pIterator)) != 0)
++nCount;
//iterator cleanup
IOObjectRelease(pIterator);
return nCount;
}//end Create()
bool wxHIDDevice::Create (int nClass, int nType, int nDev)
{
//Create the mach port
wxIOCHECK(IOMasterPort(bootstrap_port, &m_pPort), "Could not create mach port");
//Dictionary that will hold first
//the matching dictionary for determining which kind of devices we want,
//then later some registry properties from an iterator (see below)
//
//The call to IOServiceMatching filters down the
//the services we want to hid services (and also eats the
//dictionary up for us (consumes one reference))
CFMutableDictionaryRef pDictionary = IOServiceMatching(kIOHIDDeviceKey);
wxCHECK_MSG( pDictionary, false,
_T("IOServiceMatching(kIOHIDDeviceKey) failed") );
wxASSERT( pDictionary );
//Here we'll filter down the services to what we want
if (nType != -1)
{
CFNumberRef pType = CFNumberCreate(kCFAllocatorDefault,
kCFNumberIntType, &nType);
CFDictionarySetValue(pDictionary, CFSTR(kIOHIDPrimaryUsageKey), pType);
CFRelease(pType);
}
if (nClass != -1)
{
CFNumberRef pClass = CFNumberCreate(kCFAllocatorDefault,
kCFNumberIntType, &nClass);
CFDictionarySetValue(pDictionary, CFSTR(kIOHIDPrimaryUsagePageKey), pClass);
CFRelease(pClass);
}
//Now get the maching services
io_iterator_t pIterator;
wxIOCHECK(IOServiceGetMatchingServices(m_pPort, pDictionary, &pIterator), "No Matching HID Services");
wxASSERT_MSG(pIterator != 0, wxT("No devices found!"));
//Now we iterate through them
io_object_t pObject;
while ( (pObject = IOIteratorNext(pIterator)) != 0)
{
if(--nDev != 0)
continue;
if ( IORegistryEntryCreateCFProperties
(
pObject,
&pDictionary,
kCFAllocatorDefault,
kNilOptions
) != KERN_SUCCESS )
{
wxLogDebug(_T("IORegistryEntryCreateCFProperties failed"));
}
//Just for sanity :)
wxASSERT(CFGetTypeID(CFDictionaryGetValue(pDictionary, CFSTR(kIOHIDProductKey))) == CFStringGetTypeID());
/*
kIOHIDTransportKey;
kIOHIDVendorIDKey;
kIOHIDProductIDKey;
kIOHIDVersionNumberKey;
kIOHIDManufacturerKey;
kIOHIDSerialNumberKey;
if !kIOHIDLocationIDKey
kUSBDevicePropertyLocationID
kIOHIDPrimaryUsageKey
kIOHIDPrimaryUsagePageKey
idProduct
idVendor
USB Product Name
*/
//Get [product] name
m_szProductName = wxMacCFStringHolder( (CFStringRef) CFDictionaryGetValue(pDictionary, CFSTR(kIOHIDProductKey)), false ).AsString();
CFNumberRef nref = (CFNumberRef) CFDictionaryGetValue(pDictionary, CFSTR(kIOHIDProductIDKey));
if (nref)
CFNumberGetValue(
nref,
kCFNumberIntType,
&m_nProductId
);
nref = (CFNumberRef) CFDictionaryGetValue(pDictionary, CFSTR(kIOHIDVendorIDKey));
if (nref)
CFNumberGetValue(
nref,
kCFNumberIntType,
&m_nManufacturerId
);
//Create the interface (good grief - long function names!)
SInt32 nScore;
IOCFPlugInInterface** ppPlugin;
wxIOCHECK(IOCreatePlugInInterfaceForService(pObject, kIOHIDDeviceUserClientTypeID,
kIOCFPlugInInterfaceID, &ppPlugin, &nScore), "");
//Now, the final thing we can check before we fall back to asserts
//(because the dtor only checks if the device is ok, so if anything
//fails from now on the dtor will delete the device anyway, so we can't break from this).
//Get the HID interface from the plugin to the mach port
wxSCHECK((*ppPlugin)->QueryInterface(ppPlugin,
CFUUIDGetUUIDBytes(kIOHIDDeviceInterfaceID), (void**) &m_ppDevice), "");
//release the plugin
(*ppPlugin)->Release(ppPlugin);
//open the HID interface...
if ( (*m_ppDevice)->open(m_ppDevice, 0) != S_OK )
wxLogDebug(_T("HID device: open failed"));
//
//Now the hard part - in order to scan things we need "cookies" -
//
wxCFArray CookieArray = CFDictionaryGetValue(pDictionary, CFSTR(kIOHIDElementKey));
BuildCookies(CookieArray);
//cleanup
CFRelease(pDictionary);
IOObjectRelease(pObject);
break;
}
//iterator cleanup
IOObjectRelease(pIterator);
return true;
}//end Create()
