/* See if we care about this HID element, and if so, note it in our recDevice. */
static void
AddHIDElement(const void *value, void *parameter)
{
recDevice *pDevice = (recDevice *) parameter;
IOHIDElementRef refElement = (IOHIDElementRef) value;
const CFTypeID elementTypeID = refElement ? CFGetTypeID(refElement) : 0;
if (refElement && (elementTypeID == IOHIDElementGetTypeID())) {
const IOHIDElementCookie cookie = IOHIDElementGetCookie(refElement);
const uint32_t usagePage = IOHIDElementGetUsagePage(refElement);
const uint32_t usage = IOHIDElementGetUsage(refElement);
recElement *element = NULL;
recElement **headElement = NULL;
/* look at types of interest */
switch (IOHIDElementGetType(refElement)) {
case kIOHIDElementTypeInput_Misc:
case kIOHIDElementTypeInput_Button:
case kIOHIDElementTypeInput_Axis: {
switch (usagePage) { /* only interested in kHIDPage_GenericDesktop and kHIDPage_Button */
case kHIDPage_GenericDesktop:
switch (usage) {
case kHIDUsage_GD_X:
case kHIDUsage_GD_Y:
case kHIDUsage_GD_Z:
case kHIDUsage_GD_Rx:
case kHIDUsage_GD_Ry:
case kHIDUsage_GD_Rz:
case kHIDUsage_GD_Slider:
case kHIDUsage_GD_Dial:
case kHIDUsage_GD_Wheel:
if (!ElementAlreadyAdded(cookie, pDevice->firstAxis)) {
element = (recElement *) SDL_calloc(1, sizeof (recElement));
if (element) {
pDevice->axes++;
headElement = &(pDevice->firstAxis);
}
}
break;
case kHIDUsage_GD_Hatswitch:
if (!ElementAlreadyAdded(cookie, pDevice->firstHat)) {
element = (recElement *) SDL_calloc(1, sizeof (recElement));
if (element) {
pDevice->hats++;
headElement = &(pDevice->firstHat);
}
}
break;
}
break;
case kHIDPage_Simulation:
switch (usage) {
case kHIDUsage_Sim_Rudder:
case kHIDUsage_Sim_Throttle:
if (!ElementAlreadyAdded(cookie, pDevice->firstAxis)) {
element = (recElement *) SDL_calloc(1, sizeof (recElement));
if (element) {
pDevice->axes++;
headElement = &(pDevice->firstAxis);
}
}
break;
default:
break;
}
break;
case kHIDPage_Button:
if (!ElementAlreadyAdded(cookie, pDevice->firstButton)) {
element = (recElement *) SDL_calloc(1, sizeof (recElement));
if (element) {
pDevice->buttons++;
headElement = &(pDevice->firstButton);
}
}
break;
default:
break;
}
}
break;
case kIOHIDElementTypeCollection: {
CFArrayRef array = IOHIDElementGetChildren(refElement);
if (array) {
AddHIDElements(array, pDevice);
}
}
break;
default:
break;
}
if (element && headElement) { /* add to list */
recElement *elementPrevious = NULL;
recElement *elementCurrent = *headElement;
while (elementCurrent && usage >= elementCurrent->usage) {
elementPrevious = elementCurrent;
elementCurrent = elementCurrent->pNext;
}
if (elementPrevious) {
elementPrevious->pNext = element;
} else {
*headElement = element;
}
element->elementRef = refElement;
element->usagePage = usagePage;
element->usage = usage;
element->pNext = elementCurrent;
element->minReport = element->min = (SInt32) IOHIDElementGetLogicalMin(refElement);
element->maxReport = element->max = (SInt32) IOHIDElementGetLogicalMax(refElement);
element->cookie = IOHIDElementGetCookie(refElement);
pDevice->elements++;
}
}
}
static SDL_bool
GetDeviceInfo(IOHIDDeviceRef hidDevice, recDevice *pDevice)
{
Uint32 *guid32 = NULL;
CFTypeRef refCF = NULL;
CFArrayRef array = NULL;
/* get usage page and usage */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDPrimaryUsagePageKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->usagePage);
}
if (pDevice->usagePage != kHIDPage_GenericDesktop) {
return SDL_FALSE; /* Filter device list to non-keyboard/mouse stuff */
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDPrimaryUsageKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->usage);
}
if ((pDevice->usage != kHIDUsage_GD_Joystick &&
pDevice->usage != kHIDUsage_GD_GamePad &&
pDevice->usage != kHIDUsage_GD_MultiAxisController)) {
return SDL_FALSE; /* Filter device list to non-keyboard/mouse stuff */
}
pDevice->deviceRef = hidDevice;
/* get device name */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDProductKey));
if (!refCF) {
/* Maybe we can't get "AwesomeJoystick2000", but we can get "Logitech"? */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDManufacturerKey));
}
if ((!refCF) || (!CFStringGetCString(refCF, pDevice->product, sizeof (pDevice->product), kCFStringEncodingUTF8))) {
SDL_strlcpy(pDevice->product, "Unidentified joystick", sizeof (pDevice->product));
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDVendorIDKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->guid.data[0]);
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDProductIDKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->guid.data[8]);
}
/* Check to make sure we have a vendor and product ID
If we don't, use the same algorithm as the Linux code for Bluetooth devices */
guid32 = (Uint32*)pDevice->guid.data;
if (!guid32[0] && !guid32[1]) {
/* If we don't have a vendor and product ID this is probably a Bluetooth device */
const Uint16 BUS_BLUETOOTH = 0x05;
Uint16 *guid16 = (Uint16 *)guid32;
*guid16++ = BUS_BLUETOOTH;
*guid16++ = 0;
SDL_strlcpy((char*)guid16, pDevice->product, sizeof(pDevice->guid.data) - 4);
}
array = IOHIDDeviceCopyMatchingElements(hidDevice, NULL, kIOHIDOptionsTypeNone);
if (array) {
AddHIDElements(array, pDevice);
CFRelease(array);
}
return SDL_TRUE;
}
static SDL_bool
GetDeviceInfo(IOHIDDeviceRef hidDevice, recDevice *pDevice)
{
const Uint16 BUS_USB = 0x03;
const Uint16 BUS_BLUETOOTH = 0x05;
Sint32 vendor = 0;
Sint32 product = 0;
Sint32 version = 0;
CFTypeRef refCF = NULL;
CFArrayRef array = NULL;
Uint16 *guid16 = (Uint16 *)pDevice->guid.data;
/* get usage page and usage */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDPrimaryUsagePageKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->usagePage);
}
if (pDevice->usagePage != kHIDPage_GenericDesktop) {
return SDL_FALSE; /* Filter device list to non-keyboard/mouse stuff */
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDPrimaryUsageKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &pDevice->usage);
}
if ((pDevice->usage != kHIDUsage_GD_Joystick &&
pDevice->usage != kHIDUsage_GD_GamePad &&
pDevice->usage != kHIDUsage_GD_MultiAxisController)) {
return SDL_FALSE; /* Filter device list to non-keyboard/mouse stuff */
}
pDevice->deviceRef = hidDevice;
/* get device name */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDProductKey));
if (!refCF) {
/* Maybe we can't get "AwesomeJoystick2000", but we can get "Logitech"? */
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDManufacturerKey));
}
if ((!refCF) || (!CFStringGetCString(refCF, pDevice->product, sizeof (pDevice->product), kCFStringEncodingUTF8))) {
SDL_strlcpy(pDevice->product, "Unidentified joystick", sizeof (pDevice->product));
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDVendorIDKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &vendor);
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDProductIDKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &product);
}
refCF = IOHIDDeviceGetProperty(hidDevice, CFSTR(kIOHIDVersionNumberKey));
if (refCF) {
CFNumberGetValue(refCF, kCFNumberSInt32Type, &version);
}
SDL_memset(pDevice->guid.data, 0, sizeof(pDevice->guid.data));
if (vendor && product) {
*guid16++ = SDL_SwapLE16(BUS_USB);
*guid16++ = 0;
*guid16++ = SDL_SwapLE16((Uint16)vendor);
*guid16++ = 0;
*guid16++ = SDL_SwapLE16((Uint16)product);
*guid16++ = 0;
*guid16++ = SDL_SwapLE16((Uint16)version);
*guid16++ = 0;
} else {
*guid16++ = SDL_SwapLE16(BUS_BLUETOOTH);
*guid16++ = 0;
SDL_strlcpy((char*)guid16, pDevice->product, sizeof(pDevice->guid.data) - 4);
}
array = IOHIDDeviceCopyMatchingElements(hidDevice, NULL, kIOHIDOptionsTypeNone);
if (array) {
AddHIDElements(array, pDevice);
CFRelease(array);
}
return SDL_TRUE;
}
