Radio Bas

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
    Radio Bas
"""

import RPi.GPIO as GPIO
import time
import subprocess
import os
import signal

# -----
# Variables
# -----
sleep_stop = .1
channels = [{'pin': 7, 'url': 'http://pub1.diforfree.org:8000/di_club_dubstep', 'name': 'DubStep'},
              {'pin': 8, 'url': '', 'name': ''},
              {'pin': 12, 'url': '', 'name': ''},
              {'pin': 16, 'url': '', 'name': ''},
              {'pin': 20, 'url': '', 'name': ''},
              {'pin': 21, 'action': stop(), 'name': 'STOP'},
              {'pin': 24, 'url': '', 'name': ''},
              {'pin': 25, 'url': '', 'name': ''}]
# -----
# Activamos los pines del GPIO
# -----
GPIO.setmode(GPIO.BCM)
for channel in channels:
    GPIO.setup(channel['pin'], GPIO.IN, pull_up_down=GPIO.PUD_UP)


def stop():
    os.killpg(p.pid,signal.SIGTERM)
    time.sleep(sleep_stop)

while True:
    for channel in channels:
        input_state = GPIO.input(channel['pin'])
        if input_state == False:
            # Si tiene nombre, mostramos la pulsación por consola
            if 'name' in channel and channel['name']!='':
                print('Boton ' + channel['name'] + " pulsado')
            # Si tiene acción, ejecuto la función
            if 'action' in channel:
                channel['action']
            # Si tiene URL, sintonizamos canal
            if 'url' in channel and channel['url']!='':
                stop()
                url = "mplay " + channel['url']
                p = subprocess.Popen(url, shell=True, preexec_fn=os.setsid)
                time.sleep(0.2)