si_7-IRIS/announcements.py

#!/usr/bin/env python
import json, random, os, subprocess
from pprint import pprint
from time import sleep
from LEDfunctions import *

# this script plays the content of the announcer (from json file)

import subprocess
# is the guru running?
try: 
	pirate_pid = subprocess.check_output(
	["pgrep", "-f", "guru-pirate.py"]
	)
	print("guru pirate running:",pirate_pid)
	subprocess.call(["kill", pirate_pid.replace("\n","")])
except:
	print("guru-pirate is not running")
sleep(4)


# when characters speak the LEDs light up and perform effects
def vu_2_leds(color):
    while True:
        data = play_process.stdout.readline()
        if not data:
            pixels.clear() # make LEDs dark
            pixels.show()
            break
        data = data.rstrip()
        if data.endswith("%"):
            vu = float(data[:-1][-3:])/100 # 0-100
            leds_color_intensity(color, vu)


# open announcer.json files
pwd = os.path.dirname( os.path.realpath(__file__) ) + "/"
announcer_f = open(pwd + "announcer.json", "r").read()
announcer = json.loads(announcer_f)

# print(announcer)
position_file = open(pwd + "announcements_position.txt", "r")

#choosing next message in sequence
msg_sf_len=len( announcer['messages'] )
position= (int( position_file.read() ) ) + 1

if position == msg_sf_len:
    position = 0

print(position)

position_file = open(pwd + "announcements_position.txt", "w")
position_file.write(str(position))
position_file.close()

print ("position", position)


sound_dir = pwd + "Audio_recordings/Announcements/"
intro_sf = sound_dir + random.choice( announcer['introductions'] )
msg_sf = sound_dir + announcer['messages'][position]

print(intro_sf, msg_sf)


#play audio
print(intro_sf)


os.system('play -q "{}" gain 5'.format(intro_sf) )
play_process = subprocess.Popen(["aplay", msg_sf, "-f", "cd",  "--vumeter=mono"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True)
vu_2_leds(color_announcer)