413 lines
12 KiB
Python
413 lines
12 KiB
Python
# This is the player. Reliability is critical here, so we're catching
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# literally every exception possible and handling it.
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# It is key that whenever the parent server tells us to do something
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# that we respond with something, FAIL or OKAY. The server doesn't like to be kept waiting.
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from queue import Empty
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import multiprocessing
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import setproctitle
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import copy
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import json
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import time
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import sys
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# Stop the Pygame Hello message.
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import os
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os.environ['PYGAME_HIDE_SUPPORT_PROMPT'] = "hide"
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from pygame import mixer
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from mutagen.mp3 import MP3
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from helpers.state_manager import StateManager
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from helpers.logging_manager import LoggingManager
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class Player():
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state = None
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running = False
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out_q = None
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last_msg = None
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logger = None
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__default_state = {
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"initialised": False,
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"filename": "",
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"channel": -1,
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"playing": False,
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"paused": False,
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"loaded": False,
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"pos": 0,
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"pos_offset": 0,
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"pos_true": 0,
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"remaining": 0,
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"length": 0,
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"loop": False,
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"output": None
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}
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__rate_limited_params = [
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"pos",
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"pos_offset",
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"pos_true",
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"remaining"
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]
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@property
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def isInit(self):
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try:
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mixer.music.get_busy()
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except:
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return False
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return True
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@property
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def isPlaying(self):
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if self.isInit:
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return (not self.isPaused) and bool(mixer.music.get_busy())
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return False
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@property
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def isPaused(self):
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return self.state.state["paused"]
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@property
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def isLoaded(self):
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if not self.state.state["filename"]:
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return False
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if self.isPlaying:
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return True
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# Because Pygame/SDL is annoying
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# We're not playing now, so we can quickly test run
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# If that works, we're loaded.
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try:
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position = self.state.state["pos"]
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mixer.music.set_volume(0)
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mixer.music.play(0)
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except:
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try:
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mixer.music.set_volume(1)
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except:
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self.logger.log.exception("Failed to reset volume after attempting loaded test.")
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pass
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return False
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if position > 0:
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self.pause()
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else:
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self.stop()
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mixer.music.set_volume(1)
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return True
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@property
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def status(self):
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res = json.dumps(self.state.state)
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return res
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def play(self, pos=0):
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try:
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mixer.music.play(0, pos)
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self.state.update("pos_offset", pos)
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except:
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self.logger.log.exception("Failed to play at pos: " + str(pos))
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return False
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self.state.update("paused", False)
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return True
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def pause(self):
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try:
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mixer.music.pause()
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except:
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self.logger.log.exception("Failed to pause.")
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return False
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self.state.update("paused", True)
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return True
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def unpause(self):
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if not self.isPlaying:
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position = self.state.state["pos_true"]
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try:
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self.play(position)
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except:
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self.logger.log.exception("Failed to unpause from pos: " + str(position))
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return False
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self.state.update("paused", False)
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return True
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return False
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def stop(self):
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# if self.isPlaying or self.isPaused:
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try:
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mixer.music.stop()
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except:
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self.logger.log.exception("Failed to stop playing.")
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return False
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self.state.update("pos", 0)
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self.state.update("pos_offset", 0)
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self.state.update("pos_true", 0)
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self.state.update("paused", False)
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return True
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# return False
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def seek(self, pos):
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if self.isPlaying:
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try:
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self.play(pos)
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except:
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self.logger.log.exception("Failed to seek to pos: " + str(pos))
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return False
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return True
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else:
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self.state.update("paused", True)
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self._updateState(pos=pos)
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return True
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def load(self, filename):
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if not self.isPlaying:
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self.unload()
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# Fix any OS specific / or \'s
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if os.path.sep == "/":
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filename = filename.replace("\\", '/')
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else:
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filename = filename.replace("/", '\\')
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self.state.update("filename", filename)
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try:
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self.logger.log.info("Loading file: " + str(filename))
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mixer.music.load(filename)
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except:
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# We couldn't load that file.
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self.logger.log.exception("Couldn't load file: " + str(filename))
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return False
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try:
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if ".mp3" in filename:
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song = MP3(filename)
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self.state.update("length", song.info.length)
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else:
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self.state.update("length", mixer.Sound(filename).get_length()/1000)
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except:
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self.logger.log.exception("Failed to update the length of item.")
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return False
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return True
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def unload(self):
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if not self.isPlaying:
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try:
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mixer.music.unload()
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self.state.update("paused", False)
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self.state.update("filename", "")
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except:
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self.logger.log.exception("Failed to unload channel.")
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return False
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return not self.isLoaded
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def quit(self):
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try:
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mixer.quit()
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self.state.update("paused", False)
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except:
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self.logger.log.exception("Failed to quit mixer.")
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def output(self, name=None):
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wasPlaying = self.state.state["playing"]
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self.quit()
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self.state.update("output", name)
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try:
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if name:
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mixer.init(44100, -16, 2, 1024, devicename=name)
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else:
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mixer.init(44100, -16, 2, 1024)
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except:
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self.logger.log.exception("Failed to init mixer with device name: " + str(name))
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return False
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self.load(self.state.state["filename"])
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if wasPlaying:
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self.unpause()
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return True
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def _updateState(self, pos=None):
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self.state.update("initialised", self.isInit)
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if self.isInit:
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if (pos):
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self.state.update("pos", max(0, pos))
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elif self.isPlaying:
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# Get one last update in, incase we're about to pause/stop it.
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self.state.update("pos", max(0, mixer.music.get_pos()/1000))
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self.state.update("playing", self.isPlaying)
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self.state.update("loaded", self.isLoaded)
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self.state.update("pos_true", self.state.state["pos"] + self.state.state["pos_offset"])
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self.state.update("remaining", self.state.state["length"] - self.state.state["pos_true"])
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def _retMsg(self, msg, okay_str=False):
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response = self.last_msg + ":"
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if msg == True:
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response += "OKAY"
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elif isinstance(msg, str):
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if okay_str:
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response += "OKAY:" + msg
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else:
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response += "FAIL:" + msg
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else:
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response += "FAIL"
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if self.out_q:
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self.out_q.put(response)
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def __init__(self, channel, in_q, out_q):
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process_title = "Player: Channel " + str(channel)
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setproctitle.setproctitle(process_title)
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multiprocessing.current_process().name = process_title
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self.running = True
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self.out_q = out_q
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self.logger = LoggingManager("channel" + str(channel))
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self.state = StateManager("channel" + str(channel), self.logger, self.__default_state, self.__rate_limited_params)
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self.state.update("channel", channel)
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loaded_state = copy.copy(self.state.state)
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if loaded_state["output"]:
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self.logger.log.info("Setting output to: " + loaded_state["output"])
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self.output(loaded_state["output"])
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else:
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self.logger.log.info("Using default output device.")
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self.output()
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if loaded_state["filename"]:
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self.logger.log.info("Loading filename: " + loaded_state["filename"])
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self.load(loaded_state["filename"])
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if loaded_state["pos_true"] != 0:
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self.logger.log.info("Seeking to pos_true: " + str(loaded_state["pos_true"]))
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self.seek(loaded_state["pos_true"])
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if loaded_state["playing"] == True:
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self.logger.log.info("Resuming.")
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self.unpause()
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else:
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self.logger.log.info("No file was previously loaded.")
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while self.running:
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time.sleep(0.1)
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self._updateState()
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try:
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try:
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self.last_msg = in_q.get_nowait()
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except Empty:
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# The incomming message queue was empty,
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# skip message processing
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pass
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else:
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# We got a message.
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# Output re-inits the mixer, so we can do this any time.
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if (self.last_msg.startswith("OUTPUT")):
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split = self.last_msg.split(":")
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self._retMsg(self.output(split[1]))
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elif self.isInit:
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if (self.last_msg == 'LOADED?'):
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self._retMsg(self.isLoaded)
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continue
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elif (self.last_msg == 'PLAY'):
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self._retMsg(self.play())
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elif (self.last_msg == 'PAUSE'):
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self._retMsg(self.pause())
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elif (self.last_msg == 'UNPAUSE'):
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self._retMsg(self.unpause())
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elif (self.last_msg == 'STOP'):
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self._retMsg(self.stop())
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elif (self.last_msg == 'QUIT'):
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self.running = False
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continue
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elif (self.last_msg.startswith("SEEK")):
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split = self.last_msg.split(":")
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self._retMsg(self.seek(float(split[1])))
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elif (self.last_msg.startswith("LOAD")):
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split = self.last_msg.split(":")
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self._retMsg(self.load(split[1]))
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elif (self.last_msg == 'UNLOAD'):
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self._retMsg(self.unload())
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elif (self.last_msg == 'STATUS'):
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self._retMsg(self.status, True)
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else:
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self._retMsg("Unknown Command")
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else:
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if (self.last_msg == 'STATUS'):
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self._retMsg(self.status)
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else:
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self._retMsg(False)
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# Catch the player being killed externally.
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except KeyboardInterrupt:
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self.logger.log.info("Received KeyboardInterupt")
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break
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except SystemExit:
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self.logger.log.info("Received SystemExit")
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break
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except:
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self.logger.log.exception("Received unexpected exception.")
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break
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self.logger.log.info("Quiting player ", channel)
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self.quit()
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self._retMsg("EXIT")
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sys.exit(0)
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def showOutput(in_q, out_q):
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print("Starting showOutput().")
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while True:
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time.sleep(0.01)
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last_msg = out_q.get()
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print(last_msg)
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if __name__ == "__main__":
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if isMacOS:
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multiprocessing.set_start_method("spawn", True)
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in_q = multiprocessing.Queue()
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out_q = multiprocessing.Queue()
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outputProcess = multiprocessing.Process(
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target=showOutput,
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args=(in_q, out_q),
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).start()
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playerProcess = multiprocessing.Process(
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target=Player,
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args=(-1, in_q, out_q),
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).start()
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# Do some testing
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in_q.put("LOADED?")
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in_q.put("PLAY")
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in_q.put("LOAD:\\Users\\matth\\Documents\\GitHub\\bapsicle\\dev\\test.mp3")
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in_q.put("LOADED?")
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in_q.put("PLAY")
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print("Entering infinite loop.")
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while True:
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pass
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