Python pylsl.StreamInlet方法代码示例

# 需要导入模块: import pylsl [as 别名]
# 或者: from pylsl import StreamInlet [as 别名]
def _get_stream_inlet(lsl_predicate):
    """Return the stream that fits the given predicate. Raise ValueError if
    multiple streams or zero streams match the predicate.

    Parameters
    ----------
    lsl_predicate : str
        Predicate used to find LabStreamingLayer stream. See
        `default_predicates.py` for more info.

    Returns
    -------
    inlet : pylsl.StreamInlet
        The LSL stream that matches the given predicate.
    """
    stream = resolve_bypred(lsl_predicate)  # Times out after ~ 1 year.
    if len(stream) == 1:
        inlet = StreamInlet(stream[0])
        logger.info("Connected to stream.")
    else:
        msg = ("Multiple streams match the given predicate. Only one "
               "stream must match the predicate.")
        logger.error(msg)
        raise ValueError(msg)
    return inlet 

# 需要导入模块: import pylsl [as 别名]
# 或者: from pylsl import StreamInlet [as 别名]
def test_BaseStream_record_data_indefinitely():
    """Test rteeg.base.BaseStream"""
    # Start a LabStreamingLayer stream of synthetic data.
    eeg_out = SyntheticData("EEG", 32, 100, send_data=True)
    inlet = StreamInlet(resolve_streams(wait_time=1.)[0])
    base = BaseStream()

    # Check that length of base.data increases.
    len_0 = len(base.data)
    t = threading.Thread(target=base._record_data_indefinitely, args=(inlet,))
    t.daemon = True
    t.start()
    time.sleep(2.)
    len_1 = len(base.data)
    assert len_1 > len_0, "Data not being recorded."

    # Clean up.
    base._kill_signal.set()
    eeg_out.stop() 

# 需要导入模块: import pylsl [as 别名]
# 或者: from pylsl import StreamInlet [as 别名]
def test_get_stream_inlet():
    eeg_1 = SyntheticData("EEG", 32, 100, send_data=False)
    eeg_2 = SyntheticData("EEG", 32, 100, send_data=False)

    # Check for error if multiple matching streams exist.
    with pytest.raises(ValueError, message='Error on multiple streams'):
        _get_stream_inlet("type='EEG'")
    eeg_2.stop()  # Remove one LSL stream.

    # Check that inlet is of type pylsl.StreamInlet.
    inlet = _get_stream_inlet("type='EEG'")
    assert isinstance(inlet, StreamInlet), "Not pylsl.StreamInlet"
    eeg_1.stop()  # Clean up remaining LSL stream. 

# 需要导入模块: import pylsl [as 别名]
# 或者: from pylsl import StreamInlet [as 别名]
def __init__(self, info: pylsl.StreamInfo):
        # create an inlet and connect it to the outlet we found earlier.
        # max_buflen is set so data older the plot_duration is discarded
        # automatically and we only pull data new enough to show it

        # Also, perform online clock synchronization so all streams are in the
        # same time domain as the local lsl_clock()
        # (see https://labstreaminglayer.readthedocs.io/projects/liblsl/ref/enums.html#_CPPv414proc_clocksync)
        # and dejitter timestamps
        self.inlet = pylsl.StreamInlet(info, max_buflen=plot_duration,
                                       processing_flags=pylsl.proc_clocksync | pylsl.proc_dejitter)
        # store the name and channel count
        self.name = info.name()
        self.channel_count = info.channel_count() 

# 需要导入模块: import pylsl [as 别名]
# 或者: from pylsl import StreamInlet [as 别名]
def _start():
    '''Start the module
    This uses the global variables from setup and adds a set of global variables
    '''
    global parser, args, config, r, response, patch, name
    global monitor, delay, timeout, lsl_name, lsl_type, lsl_format, output_prefix, start, selected, streams, stream, inlet, type, source_id, match, lsl_id

    # this can be used to show parameters that have changed
    monitor = EEGsynth.monitor(name=name, debug=patch.getint('general', 'debug'))

    # get the options from the configuration file
    delay = patch.getfloat('general', 'delay')
    timeout = patch.getfloat('lsl', 'timeout', default=30)
    lsl_name = patch.getstring('lsl', 'name')
    lsl_type = patch.getstring('lsl', 'type')
    lsl_format = patch.getstring('lsl', 'format')
    output_prefix = patch.getstring('output', 'prefix')

    monitor.info("looking for an LSL stream...")
    start = time.time()
    selected = []
    while len(selected) < 1:
        if (time.time() - start) > timeout:
            monitor.error("Error: timeout while waiting for LSL stream")
            raise SystemExit

        # find the desired stream on the lab network
        streams = lsl.resolve_streams()
        for stream in streams:
            inlet = lsl.StreamInlet(stream)
            name = inlet.info().name()
            type = inlet.info().type()
            source_id = inlet.info().source_id()
            # determine whether this stream should be further processed
            match = True
            if len(lsl_name):
                match = match and lsl_name == name
            if len(lsl_type):
                match = match and lsl_type == type
            if match:
                # select this stream for further processing
                selected.append(stream)
                monitor.info('-------- STREAM(*) ------')
            else:
                monitor.info('-------- STREAM ---------')
            monitor.info("name = " + name)
            monitor.info("type = " + type)
        monitor.info('-------------------------')

    # create a new inlet from the first (and hopefully only) selected stream
    inlet = lsl.StreamInlet(selected[0])

    # give some feedback
    lsl_name = inlet.info().name()
    lsl_type = inlet.info().type()
    lsl_id = inlet.info().source_id()
    monitor.success('connected to LSL stream %s (type = %s, id = %s)' % (lsl_name, lsl_type, lsl_id))

    # there should not be any local variables in this function, they should all be global
    if len(locals()):
        print('LOCALS: ' + ', '.join(locals().keys()))