200 lines
7.4 KiB
Python
200 lines
7.4 KiB
Python
import os
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import sys
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import time
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import logging
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import logging.config
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import logging.handlers
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import pickle
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import telnetlib
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import calendar
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import json
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import math
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from threading import Thread
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from api_clients import api_client
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from configobj import ConfigObj
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# configure logging
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logging.config.fileConfig("logging.cfg")
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# loading config file
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try:
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config = ConfigObj('/etc/airtime/pypo.cfg')
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LS_HOST = config['ls_host']
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LS_PORT = config['ls_port']
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PUSH_INTERVAL = 2
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except Exception, e:
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logger = logging.getLogger()
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logger.error('Error loading config file %s', e)
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sys.exit()
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class PypoPush(Thread):
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def __init__(self, q):
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Thread.__init__(self)
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self.api_client = api_client.api_client_factory(config)
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self.set_export_source('scheduler')
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self.queue = q
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self.schedule = dict()
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self.playlists = dict()
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self.liquidsoap_state_play = True
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self.push_ahead = 10
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def set_export_source(self, export_source):
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self.export_source = export_source
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self.cache_dir = config["cache_dir"] + self.export_source + '/'
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self.schedule_tracker_file = self.cache_dir + "schedule_tracker.pickle"
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"""
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The Push Loop - the push loop periodically checks if there is a playlist
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that should be scheduled at the current time.
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If yes, the current liquidsoap playlist gets replaced with the corresponding one,
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then liquidsoap is asked (via telnet) to reload and immediately play it.
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"""
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def push(self, export_source):
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logger = logging.getLogger('push')
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timenow = time.time()
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# get a new schedule from pypo-fetch
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if not self.queue.empty():
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# make sure we get the latest schedule
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while not self.queue.empty():
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scheduled_data = self.queue.get()
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logger.debug("Received data from pypo-fetch")
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self.schedule = scheduled_data['schedule']
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self.playlists = scheduled_data['liquidsoap_playlists']
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logger.debug('schedule %s' % json.dumps(self.schedule))
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logger.debug('playlists %s' % json.dumps(self.playlists))
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schedule = self.schedule
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playlists = self.playlists
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currently_on_air = False
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if schedule:
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tnow = time.gmtime(timenow)
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tcoming = time.gmtime(timenow + self.push_ahead)
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str_tnow_s = "%04d-%02d-%02d-%02d-%02d-%02d" % (tnow[0], tnow[1], tnow[2], tnow[3], tnow[4], tnow[5])
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str_tcoming_s = "%04d-%02d-%02d-%02d-%02d-%02d" % (tcoming[0], tcoming[1], tcoming[2], tcoming[3], tcoming[4], tcoming[5])
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for pkey in schedule:
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plstart = schedule[pkey]['start'][0:19]
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if str_tnow_s <= plstart and plstart < str_tcoming_s:
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logger.debug('Preparing to push playlist scheduled at: %s', pkey)
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playlist = schedule[pkey]
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# We have a match, replace the current playlist and
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# force liquidsoap to refresh.
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if (self.push_liquidsoap(pkey, schedule, playlists) == 1):
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logger.debug("Pushed to liquidsoap, updating 'played' status.")
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currently_on_air = True
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self.liquidsoap_state_play = True
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# Call API to update schedule states
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logger.debug("Doing callback to server to update 'played' status.")
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self.api_client.notify_scheduled_item_start_playing(pkey, schedule)
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show_start = schedule[pkey]['show_start']
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show_end = schedule[pkey]['show_end']
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if show_start <= str_tnow_s and str_tnow_s < show_end:
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currently_on_air = True
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"""
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If currently_on_air = False but liquidsoap_state_play = True then it means that Liquidsoap may
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still be playing audio even though the show has ended ('currently_on_air = False' means no show is scheduled)
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See CC-3231.
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This is a temporary solution for Airtime 2.0
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"""
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if not currently_on_air and self.liquidsoap_state_play:
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logger.debug('Notifying Liquidsoap to stop playback.')
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try:
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tn = telnetlib.Telnet(LS_HOST, LS_PORT)
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tn.write('source.skip\n')
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tn.write('exit\n')
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tn.read_all()
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except Exception, e:
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logger.debug(e)
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logger.debug('Could not connect to liquidsoap')
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self.liquidsoap_state_play = False
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def push_liquidsoap(self, pkey, schedule, playlists):
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logger = logging.getLogger('push')
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try:
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playlist = playlists[pkey]
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plstart = schedule[pkey]['start'][0:19]
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#strptime returns struct_time in local time
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#mktime takes a time_struct and returns a floating point
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#gmtime Convert a time expressed in seconds since the epoch to a struct_time in UTC
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#mktime: expresses the time in local time, not UTC. It returns a floating point number, for compatibility with time().
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epoch_start = calendar.timegm(time.strptime(plstart, '%Y-%m-%d-%H-%M-%S'))
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#Return the time as a floating point number expressed in seconds since the epoch, in UTC.
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epoch_now = time.time()
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logger.debug("Epoch start: %s" % epoch_start)
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logger.debug("Epoch now: %s" % epoch_now)
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sleep_time = epoch_start - epoch_now;
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if sleep_time < 0:
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sleep_time = 0
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logger.debug('sleeping for %s s' % (sleep_time))
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time.sleep(sleep_time)
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tn = telnetlib.Telnet(LS_HOST, LS_PORT)
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#skip the currently playing song if any.
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logger.debug("source.skip\n")
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tn.write("source.skip\n")
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# Get any extra information for liquidsoap (which will be sent back to us)
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liquidsoap_data = self.api_client.get_liquidsoap_data(pkey, schedule)
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#Sending schedule table row id string.
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logger.debug("vars.pypo_data %s\n"%(liquidsoap_data["schedule_id"]))
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tn.write(("vars.pypo_data %s\n"%liquidsoap_data["schedule_id"]).encode('utf-8'))
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logger.debug('Preparing to push playlist %s' % pkey)
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for item in playlist:
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annotate = item['annotate']
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tn.write(str('queue.push %s\n' % annotate.encode('utf-8')))
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show_name = item['show_name']
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tn.write(str('vars.show_name %s\n' % show_name.encode('utf-8')))
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tn.write("exit\n")
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logger.debug(tn.read_all())
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status = 1
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except Exception, e:
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logger.error('%s', e)
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status = 0
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return status
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def run(self):
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loops = 0
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heartbeat_period = math.floor(30/PUSH_INTERVAL)
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logger = logging.getLogger('push')
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while True:
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if loops % heartbeat_period == 0:
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logger.info("heartbeat")
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loops = 0
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try: self.push('scheduler')
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except Exception, e:
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logger.error('Pypo Push Exception: %s', e)
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time.sleep(PUSH_INTERVAL)
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loops += 1
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