163 lines
5.6 KiB
Python
163 lines
5.6 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.queue = q
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self.media = dict()
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self.liquidsoap_state_play = True
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self.push_ahead = 30
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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):
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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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self.media = self.queue.get()
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logger.debug("Received data from pypo-fetch")
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logger.debug('media %s' % json.dumps(self.media))
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media = self.media
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currently_on_air = False
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if media:
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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 media_item in media:
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item_start = media_item['start'][0:19]
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if str_tnow_s <= item_start and item_start < str_tcoming_s:
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"""
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If the media item starts in the next 30 seconds, push it to the queue.
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"""
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logger.debug('Preparing to push media item scheduled at: %s', pkey)
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if self.push_to_liquidsoap(media_item):
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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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def push_to_liquidsoap(self, media_item):
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try:
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if media_item["starts"] == self.last_end_time:
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"""
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this media item is attached to the end of the last
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track, so let's push it now so that Liquidsoap can start playing
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it immediately after (and prepare crossfades if need be).
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"""
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telnet_to_liquidsoap(media_item)
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self.last_end_time = media_item["end"]
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else:
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"""
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this media item does not start right after a current playing track.
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We need to sleep, and then wake up when this track starts.
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"""
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sleep_until_start(media_item)
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telnet_to_liquidsoap(media_item)
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self.last_end_time = media_item["end"]
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except Exception, e:
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return False
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return True
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def sleep_until_start(media_item):
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mi_start = media_item['start'][0:19]
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#strptime returns struct_time in local time
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epoch_start = calendar.timegm(time.strptime(mi_start, '%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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def telnet_to_liquidsoap(media_item):
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tn = telnetlib.Telnet(LS_HOST, LS_PORT)
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#tn.write(("vars.pypo_data %s\n"%liquidsoap_data["schedule_id"]).encode('utf-8'))
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annotation = media_item['annotation']
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tn.write('queue.push %s\n' % annotation.encode('utf-8'))
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show_name = media_item['show_name']
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tn.write('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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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()
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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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