def close(self):
"""
Closes the connection to the NDI Tracker and
deletes the tracker device.
:raises Exception: ValueError
"""
if not self._device:
raise ValueError('close called with no NDI device')
if self._state == "tracking":
self.stop_tracking()
if self._tracker_type == "vega":
ndicapy.ndiCloseNetwork(self._device)
if self._tracker_type in ("aurora", "polaris"):
ndicapy.ndiClose(self._device)
self._device = None
self._state = None
def _check_for_errors(self, message):
errnum = ndicapy.ndiGetError(self._device)
if errnum != ndicapy.NDI_OKAY:
ndicapy.ndiClose(self._device)
raise IOError('error when {}. the error was: {}'.format(
message, ndicapy.ndiErrorString(errnum)))
break
if result != NDI_OKAY:
raise IOError(
'Could not find any NDI device in '
'{} serial port candidates checked. '
'Please check the following:\n'
'\t1) Is an NDI device connected to your computer?\n'
'\t2) Is the NDI device switched on?\n'
'\t3) Do you have sufficient privilege to connect to '
'the device? (e.g. on Linux are you part of the "dialout" '
'group?)'.format(MAX_SERIAL_PORTS))
device = ndiOpen(name)
if not device:
raise IOError('Could not connect to NDI device found on '
'{}'.format(name))
reply = ndiCommand(device, 'INIT:')
error = ndiGetError(device)
if reply.startswith('ERROR') or error != NDI_OKAY:
raise IOError('Error when sending command: '
'{}'.format(ndiErrorString(error)))
reply = ndiCommand(
device, 'COMM:{:d}{:03d}{:d}'.format(NDI_115200, NDI_8N1,
NDI_NOHANDSHAKE))
# Add your own commands here!!!
ndiClose(device)