Method enumerateDevices

src/libfreenect2.cpp:493–571

  }

  void enumerateDevices()
  {
    if (!initialized)
      return;

    LOG_INFO << "enumerating devices...";
    libusb_device **device_list;
    int num_devices = libusb_get_device_list(usb_context_, &device_list);

    LOG_INFO << num_devices << " usb devices connected";

    if(num_devices > 0)
    {
      for(int idx = 0; idx < num_devices; ++idx)
      {
        libusb_device *dev = device_list[idx];
        libusb_device_descriptor dev_desc;

        int r = libusb_get_device_descriptor(dev, &dev_desc); // this is always successful

        if(dev_desc.idVendor == Freenect2Device::VendorId && (dev_desc.idProduct == Freenect2Device::ProductId || dev_desc.idProduct == Freenect2Device::ProductIdPreview))
        {
          Freenect2DeviceImpl *freenect2_dev;

          // prevent error if device is already open
          if(tryGetDevice(dev, &freenect2_dev))
          {
            UsbDeviceWithSerial dev_with_serial;
            dev_with_serial.dev = dev;
            dev_with_serial.serial = freenect2_dev->getSerialNumber();

            enumerated_devices_.push_back(dev_with_serial);
            continue;
          }
          else
          {
            libusb_device_handle *dev_handle;
            r = libusb_open(dev, &dev_handle);

            if(r == LIBUSB_SUCCESS)
            {
              unsigned char buffer[1024];
              r = libusb_get_string_descriptor_ascii(dev_handle, dev_desc.iSerialNumber, buffer, sizeof(buffer));
              // keep the ref until determined not kinect
              libusb_ref_device(dev);
              libusb_close(dev_handle);

              if(r > LIBUSB_SUCCESS)
              {
                UsbDeviceWithSerial dev_with_serial;
                dev_with_serial.dev = dev;
                dev_with_serial.serial = std::string(reinterpret_cast<char *>(buffer), size_t(r));

                LOG_INFO << "found valid Kinect v2 " << PrintBusAndDevice(dev) << " with serial " << dev_with_serial.serial;
                // valid Kinect v2
                enumerated_devices_.push_back(dev_with_serial);
                continue;
              }