chore(playout): restructure modules (#1971)
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Jonas L
GitHub
parent
57046e2a9d
commit
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16 changed files with 20 additions and 20 deletions
229
playout/libretime_playout/player/liquidsoap.py
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229
playout/libretime_playout/player/liquidsoap.py
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import time
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from datetime import datetime, timedelta
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from loguru import logger
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from ..utils import seconds_between
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from .events import EventKind
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from .liquidsoap_gateway import TelnetLiquidsoap
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class PypoLiquidsoap:
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def __init__(self, telnet_lock, host, port):
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self.liq_queue_tracker = {
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"s0": None,
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"s1": None,
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"s2": None,
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"s3": None,
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"s4": None,
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}
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self.telnet_liquidsoap = TelnetLiquidsoap(
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telnet_lock, host, port, list(self.liq_queue_tracker.keys())
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)
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def get_telnet_dispatcher(self):
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return self.telnet_liquidsoap
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def play(self, media_item):
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if media_item["type"] == EventKind.FILE:
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self.handle_file_type(media_item)
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elif media_item["type"] == EventKind.EVENT:
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self.handle_event_type(media_item)
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elif media_item["type"] == EventKind.STREAM_BUFFER_START:
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self.telnet_liquidsoap.start_web_stream_buffer(media_item)
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elif media_item["type"] == EventKind.STREAM_OUTPUT_START:
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if (
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media_item["row_id"]
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!= self.telnet_liquidsoap.current_prebuffering_stream_id
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):
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# this is called if the stream wasn't scheduled sufficiently ahead of time
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# so that the prebuffering stage could take effect. Let's do the prebuffering now.
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self.telnet_liquidsoap.start_web_stream_buffer(media_item)
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self.telnet_liquidsoap.start_web_stream(media_item)
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elif media_item["type"] == EventKind.STREAM_BUFFER_END:
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self.telnet_liquidsoap.stop_web_stream_buffer()
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elif media_item["type"] == EventKind.STREAM_OUTPUT_END:
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self.telnet_liquidsoap.stop_web_stream_output()
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else:
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raise UnknownMediaItemType(str(media_item))
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def handle_file_type(self, media_item):
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"""
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Wait 200 seconds (2000 iterations) for file to become ready,
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otherwise give up on it.
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"""
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iter_num = 0
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while not media_item["file_ready"] and iter_num < 2000:
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time.sleep(0.1)
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iter_num += 1
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if media_item["file_ready"]:
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available_queue = self.find_available_queue()
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try:
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self.telnet_liquidsoap.queue_push(available_queue, media_item)
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self.liq_queue_tracker[available_queue] = media_item
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except Exception as e:
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logger.error(e)
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raise
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else:
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logger.warning(
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"File %s did not become ready in less than 5 seconds. Skipping...",
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media_item["dst"],
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)
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def handle_event_type(self, media_item):
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if media_item["event_type"] == "kick_out":
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self.telnet_liquidsoap.disconnect_source("live_dj")
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elif media_item["event_type"] == "switch_off":
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self.telnet_liquidsoap.switch_source("live_dj", "off")
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def is_media_item_finished(self, media_item):
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if media_item is None:
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return True
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else:
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return datetime.utcnow() > media_item["end"]
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def find_available_queue(self):
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available_queue = None
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for i in self.liq_queue_tracker:
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mi = self.liq_queue_tracker[i]
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if mi == None or self.is_media_item_finished(mi):
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# queue "i" is available. Push to this queue
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available_queue = i
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if available_queue == None:
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raise NoQueueAvailableException()
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return available_queue
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def verify_correct_present_media(self, scheduled_now):
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"""
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verify whether Liquidsoap is currently playing the correct files.
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if we find an item that Liquidsoap is not playing, then push it
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into one of Liquidsoap's queues. If Liquidsoap is already playing
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it do nothing. If Liquidsoap is playing a track that isn't in
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currently_playing then stop it.
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Check for Liquidsoap media we should source.skip
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get liquidsoap items for each queue. Since each queue can only have one
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item, we should have a max of 8 items.
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2013-03-21-22-56-00_0: {
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id: 1,
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type: "stream_output_start",
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row_id: 41,
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uri: "http://stream2.radioblackout.org:80/blackout.ogg",
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start: "2013-03-21-22-56-00",
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end: "2013-03-21-23-26-00",
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show_name: "Untitled Show",
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independent_event: true
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},
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"""
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try:
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scheduled_now_files = [
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x for x in scheduled_now if x["type"] == EventKind.FILE
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]
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scheduled_now_webstream = [
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x for x in scheduled_now if x["type"] in (EventKind.STREAM_OUTPUT_START)
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]
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schedule_ids = {x["row_id"] for x in scheduled_now_files}
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row_id_map = {}
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liq_queue_ids = set()
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for i in self.liq_queue_tracker:
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mi = self.liq_queue_tracker[i]
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if not self.is_media_item_finished(mi):
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liq_queue_ids.add(mi["row_id"])
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row_id_map[mi["row_id"]] = mi
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to_be_removed = set()
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to_be_added = set()
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# Iterate over the new files, and compare them to currently scheduled
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# tracks. If already in liquidsoap queue still need to make sure they don't
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# have different attributes
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# if replay gain changes, it shouldn't change the amplification of the currently playing song
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for i in scheduled_now_files:
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if i["row_id"] in row_id_map:
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mi = row_id_map[i["row_id"]]
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correct = (
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mi["start"] == i["start"]
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and mi["end"] == i["end"]
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and mi["row_id"] == i["row_id"]
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)
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if not correct:
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# need to re-add
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logger.info("Track %s found to have new attr." % i)
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to_be_removed.add(i["row_id"])
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to_be_added.add(i["row_id"])
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to_be_removed.update(liq_queue_ids - schedule_ids)
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to_be_added.update(schedule_ids - liq_queue_ids)
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if to_be_removed:
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logger.info("Need to remove items from Liquidsoap: %s" % to_be_removed)
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# remove files from Liquidsoap's queue
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for i in self.liq_queue_tracker:
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mi = self.liq_queue_tracker[i]
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if mi is not None and mi["row_id"] in to_be_removed:
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self.stop(i)
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if to_be_added:
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logger.info("Need to add items to Liquidsoap *now*: %s" % to_be_added)
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for i in scheduled_now_files:
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if i["row_id"] in to_be_added:
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self.modify_cue_point(i)
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self.play(i)
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# handle webstreams
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current_stream_id = self.telnet_liquidsoap.get_current_stream_id()
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logger.debug(f"scheduled now webstream: {scheduled_now_webstream}")
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if scheduled_now_webstream:
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if int(current_stream_id) != int(scheduled_now_webstream[0]["row_id"]):
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self.play(scheduled_now_webstream[0])
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elif current_stream_id != "-1":
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# something is playing and it shouldn't be.
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self.telnet_liquidsoap.stop_web_stream_buffer()
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self.telnet_liquidsoap.stop_web_stream_output()
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except KeyError as e:
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logger.error("Error: Malformed event in schedule. " + str(e))
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def stop(self, queue):
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self.telnet_liquidsoap.queue_remove(queue)
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self.liq_queue_tracker[queue] = None
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def is_file(self, media_item):
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return media_item["type"] == EventKind.FILE
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def clear_queue_tracker(self):
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for i in self.liq_queue_tracker.keys():
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self.liq_queue_tracker[i] = None
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def modify_cue_point(self, link):
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assert self.is_file(link)
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lateness = seconds_between(link["start"], datetime.utcnow())
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if lateness > 0:
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logger.debug(f"media item was supposed to start {lateness}s ago")
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cue_in_orig = timedelta(seconds=float(link["cue_in"]))
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link["cue_in"] = cue_in_orig.total_seconds() + lateness
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def clear_all_queues(self):
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self.telnet_liquidsoap.queue_clear_all()
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class UnknownMediaItemType(Exception):
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pass
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class NoQueueAvailableException(Exception):
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pass
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