int32 value type incorrect on Windows

[matthiasdold]

I encountered an incorrect value type when using int32 values on Window (tested with python 3.11 and 3.12, pip 24.0, pylsl 1.16.1). The minimum example below correctly prints <class 'ctypes.c_int'> both on Linux (current Arch) and MacOS (Darwin, M1).

But on Window 11 it prints <class 'ctypes.c_long'> which would be int64 data type. Also the data transfer fails if you pull the data into an numpy.int32 buffer.

Minimum example:

import pylsl

feature_info = pylsl.StreamInfo(
    name="test",
    type="EEG",
    channel_count=1,
    nominal_srate=1,
    channel_format=pylsl.cf_int32,
    source_id="testid",
)
outlet = pylsl.StreamOutlet(feature_info)

streams = pylsl.resolve_byprop("name", "test", timeout=1)
inlet = pylsl.StreamInlet(streams[0])

print(inlet.value_type)

I also checked the other data types from pylsl.string2fmt on all three OSs and all others works correctly.