static io_service_t GetUsbDevice(io_service_t service) {
IOReturn status;
io_iterator_t iterator = 0;
io_service_t device = 0;
if (!service) {
return device;
}
status = IORegistryEntryCreateIterator(service,
kIOServicePlane,
(kIORegistryIterateParents | kIORegistryIterateRecursively),
&iterator);
if (status == kIOReturnSuccess) {
io_service_t currentService;
while ((currentService = IOIteratorNext(iterator)) && device == 0) {
io_name_t serviceName;
status = IORegistryEntryGetNameInPlane(currentService, kIOServicePlane, serviceName);
if (status == kIOReturnSuccess && IOObjectConformsTo(currentService, kIOUSBDeviceClassName)) {
device = currentService;
} else {
// Release the service object which is no longer needed
(void) IOObjectRelease(currentService);
}
}
// Release the iterator
(void) IOObjectRelease(iterator);
}
return device;
}
static void set_cam_reg_name(io_service_t srv, uvccCam *cam)
{
io_name_t cls;
IOReturn ior;
cam->regName = IORegistryEntryCreateCFProperty(srv, CFSTR(kUSBProductString), kCFAllocatorDefault, 0);
if(cam == NULL)
{ /* get it "manually" */
ior = IORegistryEntryGetNameInPlane(srv, kIOServicePlane, cls);
if(ior != kIOReturnSuccess) {
uvcc_err("set_cam_reg_name: IORegistryEntryGetNameInPlane", ior);
cam->regName = CFSTR(UVCC_UNKNOWN_CAM_REG_NAME);
}
else cam->regName = CFStringCreateWithCString(kCFAllocatorDefault, cls, kCFStringEncodingUTF8);
}
}
