""" BAPSicle Server Next-gen audio playout server for University Radio York playout, based on WebStudio interface. Audio Player Authors: Matthew Stratford Michael Grace Date: October, November 2020 """ # This is the player. Reliability is critical here, so we're catching # literally every exception possible and handling it. # It is key that whenever the parent server tells us to do something # that we respond with something, FAIL or OKAY. The server doesn't like to be kept waiting. from queue import Empty import multiprocessing import setproctitle import copy import json import time import sys from typing import Callable, Dict, List from plan import PlanItem # Stop the Pygame Hello message. import os os.environ['PYGAME_HIDE_SUPPORT_PROMPT'] = "hide" from pygame import mixer from mutagen.mp3 import MP3 from helpers.myradio_api import MyRadioAPI from helpers.os_environment import isMacOS from helpers.state_manager import StateManager from helpers.logging_manager import LoggingManager class Player(): state = None running = False out_q = None last_msg = None logger = None __default_state = { "initialised": False, "loaded_item": None, "channel": -1, "playing": False, "paused": False, "loaded": False, "pos": 0, "pos_offset": 0, "pos_true": 0, "remaining": 0, "length": 0, "auto_advance": True, "repeat": "NONE", #NONE, ONE or ALL "play_on_load": False, "output": None, "show_plan": [] } __rate_limited_params = [ "pos", "pos_offset", "pos_true", "remaining" ] @property def isInit(self): try: mixer.music.get_busy() except: return False return True @property def isPlaying(self): if self.isInit: return (not self.isPaused) and bool(mixer.music.get_busy()) return False @property def isPaused(self): return self.state.state["paused"] @property def isLoaded(self): if not self.state.state["loaded_item"]: return False if self.isPlaying: return True # Because Pygame/SDL is annoying # We're not playing now, so we can quickly test run # If that works, we're loaded. try: position = self.state.state["pos"] mixer.music.set_volume(0) mixer.music.play(0) except: try: mixer.music.set_volume(1) except: self.logger.log.exception("Failed to reset volume after attempting loaded test.") pass return False if position > 0: self.pause() else: self.stop() mixer.music.set_volume(1) return True @property def status(self): state = copy.copy(self.state.state) # Not the biggest fan of this, but maybe I'll get a better solution for this later state["loaded_item"] = state["loaded_item"].__dict__ if state["loaded_item"] else None state["show_plan"] = [repr.__dict__ for repr in state["show_plan"]] res = json.dumps(state) return res ### Audio Playout Related Methods def play(self, pos=0): try: mixer.music.play(0, pos) self.state.update("pos_offset", pos) except: self.logger.log.exception("Failed to play at pos: " + str(pos)) return False self.state.update("paused", False) return True def pause(self): try: mixer.music.pause() except: self.logger.log.exception("Failed to pause.") return False self.state.update("paused", True) return True def unpause(self): if not self.isPlaying: position = self.state.state["pos_true"] try: self.play(position) except: self.logger.log.exception("Failed to unpause from pos: " + str(position)) return False self.state.update("paused", False) return True return False def stop(self): # if self.isPlaying or self.isPaused: try: mixer.music.stop() except: self.logger.log.exception("Failed to stop playing.") return False self.state.update("pos", 0) self.state.update("pos_offset", 0) self.state.update("pos_true", 0) self.state.update("paused", False) return True # return False def seek(self, pos): if self.isPlaying: try: self.play(pos) except: self.logger.log.exception("Failed to seek to pos: " + str(pos)) return False return True else: self.state.update("paused", True) self._updateState(pos=pos) return True def set_auto_advance(self, message: int) -> bool: if message == 0: self.state.update("auto_advance", False) return True # It did it elif message == 1: self.state.update("auto_advance", True) return True else: return False def set_repeat(self, message: str) -> bool: if message in ["ALL", "ONE", "NONE"]: self.state.update("repeat", message) return True else: return False def set_play_on_load(self, message: int) -> bool: if message == 0: self.state.update("play_on_load", False) return True # It did it elif message == 1: self.state.update("play_on_load", True) return True else: return False ### Show Plan Related Methods def add_to_plan(self, new_item: Dict[str, any]) -> bool: self.state.update("show_plan", self.state.state["show_plan"] + [PlanItem(new_item)]) return True def remove_from_plan(self, timeslotItemId: int) -> bool: plan_copy = copy.copy(self.state.state["show_plan"]) for i in range(len(plan_copy)): if plan_copy[i].timeslotItemId == timeslotItemId: plan_copy.remove(i) self.state.update("show_plan", plan_copy) return True return False def clear_channel_plan(self) -> bool: self.state.update("show_plan", []) return True def load(self, timeslotItemId: int): if not self.isPlaying: self.unload() found: bool = False showplan = self.state.state["show_plan"] loaded_item: PlanItem for i in range(len(showplan)): if showplan[i].timeslotItemId == timeslotItemId: loaded_item = showplan[i] found = True break if not found: self.logger.log.error("Failed to find timeslotItemId: {}".format(timeslotItemId)) return False if (loaded_item.filename == "" or loaded_item.filename == None): loaded_item.filename = MyRadioAPI.get_filename(item = loaded_item) self.state.update("loaded_item", loaded_item) for i in range(len(showplan)): if showplan[i].timeslotItemId == timeslotItemId: self.state.update("show_plan", index=i, value=loaded_item) break # TODO: Update the show plan filenames try: self.logger.log.info("Loading file: " + str(loaded_item.filename)) mixer.music.load(loaded_item.filename) except: # We couldn't load that file. self.logger.log.exception("Couldn't load file: " + str(loaded_item.filename)) return False try: if ".mp3" in filename: song = MP3(filename) self.state.update("length", song.info.length) else: self.state.update("length", mixer.Sound(filename).get_length()/1000) except: self.logger.log.exception("Failed to update the length of item.") return False return True def unload(self): if not self.isPlaying: try: mixer.music.unload() self.state.update("paused", False) self.state.update("loaded_item", None) except: self.logger.log.exception("Failed to unload channel.") return False return not self.isLoaded def quit(self): try: mixer.quit() self.state.update("paused", False) except: self.logger.log.exception("Failed to quit mixer.") def output(self, name=None): wasPlaying = self.state.state["playing"] name = None if name == "none" else name self.quit() self.state.update("output", name) try: if name: mixer.init(44100, -16, 2, 1024, devicename=name) else: mixer.init(44100, -16, 2, 1024) except: self.logger.log.exception("Failed to init mixer with device name: " + str(name)) return False loadedItem = self.state.state["loaded_item"] if (loadedItem): self.load(loadedItem.timeslotItemId) if wasPlaying: self.unpause() return True def _updateState(self, pos=None): self.state.update("initialised", self.isInit) if self.isInit: if (pos): self.state.update("pos", max(0, pos)) elif self.isPlaying: # Get one last update in, incase we're about to pause/stop it. self.state.update("pos", max(0, mixer.music.get_pos()/1000)) self.state.update("playing", self.isPlaying) self.state.update("loaded", self.isLoaded) self.state.update("pos_true", self.state.state["pos"] + self.state.state["pos_offset"]) self.state.update("remaining", self.state.state["length"] - self.state.state["pos_true"]) if self.state.state["remaining"] == 0 and self.state.state["loaded_item"]: # Track has ended print("Finished", self.state.state["loaded_item"].name) # Repeat 1 if self.state.state["repeat"] == "ONE": self.play() # Auto Advance elif self.state.state["auto_advance"]: for i in range(len(self.state.state["show_plan"])): if self.state.state["show_plan"][i].timeslotItemId == self.state.state["loaded_item"].timeslotItemId: if len(self.state.state["show_plan"]) > i+1: self.load(self.state.state["show_plan"][i+1].timeslotItemId) break # Repeat All elif self.state.state["repeat"] == "ALL": self.load(self.state.state["show_plan"][0].timeslotItemId) # Play on Load if self.state.state["play_on_load"]: self.play() def _retMsg(self, msg, okay_str=False): response = self.last_msg + ":" if msg == True: response += "OKAY" elif isinstance(msg, str): if okay_str: response += "OKAY:" + msg else: response += "FAIL:" + msg else: response += "FAIL" if self.out_q: self.out_q.put(response) def __init__(self, channel, in_q, out_q): process_title = "Player: Channel " + str(channel) setproctitle.setproctitle(process_title) multiprocessing.current_process().name = process_title self.running = True self.out_q = out_q self.logger = LoggingManager("channel" + str(channel)) self.state = StateManager("channel" + str(channel), self.logger, self.__default_state, self.__rate_limited_params) self.state.update("channel", channel) loaded_state = copy.copy(self.state.state) if loaded_state["output"]: self.logger.log.info("Setting output to: " + loaded_state["output"]) self.output(loaded_state["output"]) else: self.logger.log.info("Using default output device.") self.output() if loaded_state["loaded_item"]: self.logger.log.info("Loading filename: " + str(loaded_state["loaded_item"].filename)) self.load(loaded_state["loaded_item"].timeslotItemId) if loaded_state["pos_true"] != 0: self.logger.log.info("Seeking to pos_true: " + str(loaded_state["pos_true"])) self.seek(loaded_state["pos_true"]) if loaded_state["playing"] == True: self.logger.log.info("Resuming.") self.unpause() else: self.logger.log.info("No file was previously loaded.") while self.running: time.sleep(0.1) self._updateState() try: try: self.last_msg = in_q.get_nowait() except Empty: # The incomming message queue was empty, # skip message processing pass else: # We got a message. # Output re-inits the mixer, so we can do this any time. if (self.last_msg.startswith("OUTPUT")): split = self.last_msg.split(":") self._retMsg(self.output(split[1])) elif self.isInit: message_types: Dict[str, Callable[any, bool]] = { # TODO Check Types "STATUS": lambda: self._retMsg(self.status, True), # Audio Playout "PLAY": lambda: self._retMsg(self.play()), "PAUSE": lambda: self._retMsg(self.pause()), "UNPAUSE": lambda: self._retMsg(self.unpause()), "STOP": lambda: self._retMsg(self.stop()), "SEEK": lambda: self._retMsg(self.seek(float(self.last_msg.split(":")[1]))), "AUTOADVANCE": lambda: self._retMsg(self.set_auto_advance(int(self.last_msg.split(":")[1]))), "REPEAT": lambda: self._retMsg(self.set_repeat(self.last_msg.split(":")[1])), "PLAYONLOAD": lambda: self._retMsg(self.set_play_on_load(int(self.last_msg.split(":")[1]))), # Show Plan Items "LOAD": lambda: self._retMsg(self.load(int(self.last_msg.split(":")[1]))), "LOADED?": lambda: self._retMsg(self.isLoaded), "UNLOAD": lambda: self._retMsg(self.unload()), "ADD": lambda: self._retMsg(self.add_to_plan(json.loads(":".join(self.last_msg.split(":")[1:])))), "REMOVE": lambda: self._retMsg(self.remove_from_plan(int(self.last_msg.split(":")[1]))), "CLEAR": lambda: self._retMsg(self.clear_channel_plan()) } message_type: str = self.last_msg.split(":")[0] if message_type in message_types.keys(): message_types[message_type]() elif (self.last_msg == 'QUIT'): self.running = False continue else: self._retMsg("Unknown Command") else: if (self.last_msg == 'STATUS'): self._retMsg(self.status) else: self._retMsg(False) # Catch the player being killed externally. except KeyboardInterrupt: self.logger.log.info("Received KeyboardInterupt") break except SystemExit: self.logger.log.info("Received SystemExit") break except: self.logger.log.exception("Received unexpected exception.") break self.logger.log.info("Quiting player ", channel) self.quit() self._retMsg("EXIT") sys.exit(0) def showOutput(in_q, out_q): print("Starting showOutput().") while True: time.sleep(0.01) last_msg = out_q.get() print(last_msg) if __name__ == "__main__": if isMacOS(): multiprocessing.set_start_method("spawn", True) in_q = multiprocessing.Queue() out_q = multiprocessing.Queue() outputProcess = multiprocessing.Process( target=showOutput, args=(in_q, out_q), ).start() playerProcess = multiprocessing.Process( target=Player, args=(-1, in_q, out_q), ).start() # Do some testing in_q.put("LOADED?") in_q.put("PLAY") in_q.put("LOAD:dev/test.mp3") in_q.put("LOADED?") in_q.put("PLAY") print("Entering infinite loop.") while True: pass