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# Control script for the piPlayer. In order to run with PulseAudio, the OSS
# sound driver has to be set as first option in ~/.moc/config
# The mocp server is then run over the padsp wrapper.
#
# ~/.moc/config
# # Use OSS for Pulseaudio compatibility (run 'padsp mocp')
# SoundDriver = OSS:ALSA:JACK
import RPi.GPIO as GPIO
import logging
import time
import subprocess
import select # see http://stackoverflow.com/a/10759061/3761783
import os
# Configuration
MUSIC_BASE_DIRECTORY = "/media/share/Audio/Kinder/"
SOUND_SCANNING = "/home/pi/scanning.mp3"
SOUND_OK = "/home/pi/263133__pan14__tone-beep.mp3"
SOUND_SCAN_FAIL = "/home/pi/159367__huminaatio__7-error.mp3"
SOUND_PLAYBACK_ERROR = "/home/pi/no.mp3"
QR_SCANNER_TIMEOUT = 3
BUTTON_PAUSE = 0.4
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s.%(msecs)d %(levelname)s - %(message)s')
logging.info('Initializing')
# photo sensor on PIN 4
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.IN)
# LED on PIN 17
GPIO.setup(17, GPIO.OUT)
GPIO.output(17, GPIO.LOW)
# Buttons on PINs 14, 15 and 18
GPIO.setup(14, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP)
photo_sensor_still_active = False
try:
logging.info('Start moc server')
subprocess.call(["padsp", "mocp", "--server"])
subprocess.call(["mocp", "--clear"])
subprocess.call(["mocp", "-l", SOUND_OK])
while True:
# TODO what's a good value here?
time.sleep(0.01)
if (GPIO.input(14) == False):
logging.debug('mocp --previous')
subprocess.call(["mocp", "--previous"])
time.sleep(BUTTON_PAUSE)
# TODO wait for ~0.25 s, if button is still pressed, seek instead of skipping
if (GPIO.input(15) == False):
logging.debug('mocp --toggle-pause')
subprocess.call(["mocp", "--toggle-pause"])
time.sleep(BUTTON_PAUSE)
if (GPIO.input(18) == False):
logging.debug('mocp --next')
subprocess.call(["mocp", "--next"])
time.sleep(BUTTON_PAUSE)
# TODO wait for ~0.25 s, if button is still pressed, seek instead of skipping
# check photo sensor
if ((not photo_sensor_still_active) and (GPIO.input(4) == GPIO.HIGH)):
logging.debug('Photo sensor active, activating light and camera')
subprocess.call(["mocp", "-l", SOUND_SCANNING])
# turn LED on
GPIO.output(17, GPIO.HIGH)
# scan QR code
zbarcam = subprocess.Popen(['zbarcam', '--nodisplay', '--raw', '-Sdisable', '-Sqrcode.enable', '--prescale=320x240', '/dev/video0'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
poll_obj = select.poll()
poll_obj.register(zbarcam.stdout, select.POLLIN)
# wait for scan result (or timeout)
start_time = time.time()
poll_result = False
while ((time.time() - start_time) < QR_SCANNER_TIMEOUT and (not poll_result)):
poll_result = poll_obj.poll(100)
if (poll_result):
try:
qr_code = zbarcam.stdout.readline().rstrip()
qr_code = qr_code.decode("utf-8") # python3
logging.debug("QR Code: {}".format(qr_code))
if (not qr_code.startswith("http://")):
# create full path
full_path = MUSIC_BASE_DIRECTORY + qr_code
logging.debug("Full Path {}".format(full_path))
if (not os.path.isfile(full_path)):
logging.debug("not a file > add as directory")
directory = full_path
logging.debug("Directory {}".format(directory))
else:
logging.debug("it's a file")
directory = os.path.dirname(os.path.realpath(full_path))
filename = os.path.basename(full_path)
logging.debug("Directory {}".format(directory))
logging.debug("Filename {}".format(filename))
os.chdir(directory)
#onlyfiles = [f for f in os.listdir('.') if os.path.isfile(os.path.join('.', f))]
#logging.debug(onlyfiles)
else:
logging.debug("URL > open as stream")
stream_url = qr_code
subprocess.call(["mocp", "--clear"])
subprocess.call(["mocp", "--stop"])
logging.debug("Stopped")
# play confirmation sound
subprocess.call(["mocp", "-l", SOUND_OK])
if ('stream_url' in locals()):
logging.debug("Add stream")
subprocess.check_call(["mocp", "-a", stream_url])
del stream_url
elif ('filename' in locals()):
logging.debug("Add file {}".format(filename))
subprocess.check_call(["mocp", "-a", filename])
del filename
else:
logging.debug("Add directory {}".format(directory))
subprocess.check_call(["mocp", "-a", "."])
# subprocess.check_call(["mocp", "-a", target, "-p"])
logging.debug("Start playback")
subprocess.check_call(["mocp", "-p"])
except subprocess.CalledProcessError as e:
logging.debug("Error starting playback, mocp returned {}".format(e.returncode))
logging.debug(e.output)
subprocess.call(["mocp", "-l", SOUND_PLAYBACK_ERROR])
except FileNotFoundError as e:
logging.debug("Could not open directory {}".format(directory))
subprocess.call(["mocp", "-l", SOUND_PLAYBACK_ERROR])
else:
logging.debug('Timeout on zbarcam')
subprocess.call(["mocp", "-l", SOUND_SCAN_FAIL])
# consider the photo sensor to be blocked
photo_sensor_still_active = True
zbarcam.terminate()
# LED off
GPIO.output(17, GPIO.LOW)
elif (GPIO.input(4) == GPIO.LOW):
# the photo sensor is not blocked (anymore)
photo_sensor_still_active = False
# Exit when Ctrl-C is pressed
except KeyboardInterrupt:
logging.info('Close moc server')
subprocess.call(["mocp", "--exit"])
logging.info('Reset GPIO configuration and close')
GPIO.cleanup()