import pylsl
import time
import random

# on my M3 MacBook I had to recompile the LSL library and then this is needed
# export DYLD_LIBRARY_PATH=/Users/roboos/matlab/liblsl-maca64/bin

info = pylsl.StreamInfo(
    name='My Marker Stream',
    type='Markers',
    channel_count=1,
    nominal_srate=0, # should be zero for markers
    channel_format='string',
    source_id=None,
)

# Create a new outlet
outlet = pylsl.StreamOutlet(info)

# Print the stream info
print("Now publishing stream:", info.name(), info.type(), info.channel_count(), "channels at", info.nominal_srate(), "Hz")

print("now sending markers...")
markernames = ['Test', 'Blah', 'Marker', 'XXX', 'Testtest', 'Test-1-2-3']
while True:
    # pick a sample to send an wait for a bit
    marker = [random.choice(markernames)]
    print("Pushing marker:", marker)
    outlet.push_sample(marker)
    time.sleep(random.random()*2)