lasp/scripts/play_sine

#!/usr/bin/python3
import numpy as np
import sys, logging, os, argparse

parser = argparse.ArgumentParser(
    description='Play a sine wave'
)

parser.add_argument('--freq', '-f', help='Sine frequency [Hz]', type=float,
                    default=1000.)

parser.add_argument('--log', '-l', 
                    help='Specify log level [info, debug, warning, ...]',
                    type=str, default='info')

args = parser.parse_args()

numeric_level = getattr(logging, args.log.upper(), None)
if not isinstance(numeric_level, int):
    raise ValueError('Invalid log level: %s' % args.loglevel)

FORMAT = "[%(levelname)s %(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
logging.basicConfig(format=FORMAT, level=numeric_level)

import multiprocessing
from lasp import (StreamManager, AvType, Siggen, SignalType, SiggenData)
from lasp.device import DaqConfigurations


if __name__ == '__main__':
    multiprocessing.set_start_method('forkserver', force=True)
    logging.info(f'Playing frequency {args.freq} [Hz]')

    configs = DaqConfigurations.loadConfigs()

    config_keys = [key for key in configs.keys()]
    for i, key in enumerate(config_keys):
        print(f'{i:2} : {key}')

    choosen_index = input('Number of configuration to use: ')
    try:
        daqindex = int(choosen_index)
    except:
        print('Invalid configuration number. Exiting.')
        sys.exit(0)


    choosen_key = config_keys[daqindex]
    daqconfig = configs[choosen_key].output_config

    print(f'Choosen configuration: {choosen_key}')

    try:
        streammgr = StreamManager()
        outq = streammgr.getOutputQueue()

        siggendata = SiggenData(
            fs=48e3,
            nframes_per_block=1024,
            dtype=np.dtype(np.int16),
            eqdata=None,
            level_dB=-20,
            signaltype=SignalType.Periodic,
            signaltypedata=(args.freq,)
        )
        siggen = Siggen(outq, siggendata)

        streammgr.activateSiggen()

        streammgr.startStream(AvType.audio_output, daqconfig)

        input('Press any key to stop...')
        streammgr.stopStream(AvType.audio_output)
    finally:
        siggen.cleanup()
        streammgr.cleanup()