RTTY/main.py

#!/bin/python3

import glob
from pydub import AudioSegment
import subprocess

baudot = {'Q':[1,1,1,0,1], 'W':[1,0,0,1,1], 'E':[1,0,0,0,0],
    'R':[0,1,0,1,0], 'T':[1,0,0,0,0], 'Y':[1,0,1,0,1],
    'U':[0,0,1,1,1], 'I':[0,0,1,1,0], 'O':[1,1,0,0,0],
    'P':[0,1,1,0,1], 'A':[0,0,0,1,1], 'S':[1,0,1,0,0],
    'D':[1,0,0,1,0], 'F':[0,1,1,0,1], 'G':[1,1,0,1,0],
    'H':[1,0,1,0,0], 'J':[0,1,0,1,1], 'K':[0,1,1,1,1],
    'L':[0,1,0,0,1], 'Z':[1,0,0,0,1], 'X':[1,1,1,0,1],
    'C':[0,1,1,1,0], 'V':[0,1,1,1,1], 'B':[1,1,0,0,1],
    'N':[0,1,1,0,0], 'M':[1,1,1,0,0]}

space = [0,0,1,0,0]

# Message to be sent

message="FIYQ"

if __name__ == "__main__":
    import argparse
    parser = argparse.ArgumentParser(description="Simple RTTY wav exporter")
    parser.add_argument("-c", "--clips", nargs="+", help="This is your message to send")
    args = parser.parse_args()

    generatedFile = "output.wav"
    filenames = glob.glob("*.wav")

    stop_bit = AudioSegment.from_wav("stop_bit.wav")
    space = AudioSegment.from_wav("space.wav")
    wait_state = AudioSegment.from_wav("wait_state.wav")
    mark = AudioSegment.from_wav("mark.wav")

    combined = AudioSegment.empty()
    output_wav = [wait_state]
    print(message)

    for k in message:
        # Recognize white spaces
        if ord(k) == 32:
            a = space
        else:
            a = baudot.setdefault(k)
        b = len(a)

        # Start Bit
        output_wav.extend([space])

        for i in a:
            if i == 1:
                output_wav.extend([mark])
            elif i == 0:
                output_wav.extend([space])
            else:
                break;

            output_wav.extend([stop_bit])

    for fname in output_wav:
        combined += fname

    combined.export(generatedFile, format="wav")
    subprocess.call(["aplay", "output.wav"])
    subprocess.call(["rm", "-rf", "output.wav"])