class MusicPlayer:
cmd = ['mpg321','-R','RPi']
volume = 0 #Specified in gain dB
def __init__(self):
self.init = True
self.prun = False
self.perror = 0
self.errorlog = []
self.first_out = ("","","","")
self.current_out =("","","","")
self.playing = False
self.playlist = Playlist()
self.adjustVolume(0)
def openPlayer(self):
if not(self.prun):
self.p = Popen(MusicPlayer.cmd,stdin=PIPE,stdout=PIPE,stderr=STDOUT)
self.prun = True
self.pout = Thread(target=self.readoutput)
self.pout.daemon = True
self.pout.start()
return "Opened player"
else:
return "Player already open"
def stopPlayer(self):
if (self.prun):
self.prun = False
self.send("QUIT")
self.p.terminate()
self.p.wait()
return "Stopped player"
else:
return "Player not running"
def adjustVolume(self,adjust):
try:
MusicPlayer.volume = max(-100,min(0,MusicPlayer.volume+int(adjust)))
except TypeError:
return "[Error] Adjustment is not a number"
finally:
call(["amixer","-q","set","PCM","--",str(MusicPlayer.volume)+"dB"])
return "Set volume to %s" % str(MusicPlayer.volume)+"dB"
def send(self,mesg):
self.p.stdin.write(mesg + "\n")
self.p.stdin.flush()
def readoutput(self):
while self.prun:
get_output = self.p.stdout.readline().strip("\n").split(" ")
if get_output[0] == "@S":
new_load = True
elif get_output[0] == "@P":
if get_output[1] == "3":
self.next()
elif get_output[0] == "@E":
self.perror += 1
self.errorlog.append(" ".join(get_output[1:]))
if self.perror > 10:
for item in self.errorlog: print("ERRORLOG: %s" % item)
self.quit()
elif get_output[0] == "@F":
if new_load:
self.first_out = (get_output[1],get_output[2],get_output[3],get_output[4])
new_load = False
else:
self.current_out = (get_output[1],get_output[2],get_output[3],get_output[4])
def quit(self):
self.stopPlayer()
self.init = False
return "Quiting..."
def user_input(self,user_in):
if user_in[0] == "QUIT":
return self.quit()
elif user_in[0] == "PLAYLIST":
try:
if user_in[1] == "LENGTH":
return "Length: %d" % self.playlist.len()
elif user_in[1] == "FILEADD":
if 1 <= len(user_in[2:]) <= 4:
self.playlist.add(PlaylistItem(*user_in[2:]))
return "Adding..." #NEEDS EXIT SPECIFICATION
else:
return "[ADD] Incorrect number of arguments!"
elif user_in[1] == "DIRADD":
if len(user_in[2:]) == 1:
return self.playlist.add_dir(user_in[2])
else:
return "[DIRADD] Incorrect number of arguments!"
elif user_in[1] == "SHOW":
return self.playlist.show()
elif user_in[1] == "CLEAR":
return self.playlist.clear()
elif user_in[1] == "SHUFFLE":
self.playlist.randomize()
if self.playing:
self.play()
return "Randomized playlist:\n %s" % self.playlist.show()
else:
return "Unknown PLAYLIST command."
except IndexError:
return self.playlist.show()
except:
raise
elif user_in[0] == "PLAY":
return self.play()
elif user_in[0] == "NEXT":
return self.next()
elif user_in[0] == "PREVIOUS":
return self.prev()
elif user_in[0] == "JUMP":
try: return self.jump(user_in[1])
except: return "No track number supplied."
elif user_in[0] == "STOP":
return self.stop()
elif user_in[0] == "REPEAT":
self.playlist.repeat = not(self.playlist.repeat)
return "REPEAT is now %s" % ("ON" if self.playlist.repeat else "OFF")
elif user_in[0] == "LIBRARY":
try:
return "%s" % self.playlist.setlibrary(user_in[1])
except IndexError:
return "Current library PATH is: %s" % Playlist.root
elif user_in[0] == "VOLUME":
try:
if user_in[1] == "UP":
return self.adjustVolume(1)
elif user_in[1] == "DOWN":
return self.adjustVolume(-1)
else:
return "Unknown argument"
except IndexError:
return "Current volume is %s" % str(MusicPlayer.volume) + "dB"
elif user_in[0] == "ERRORLOG":
return "\n".join(self.errorlog)
elif user_in[0] == "STATUS":
return "%s" % " ".join(self.current_out)
else:
return "Unknown command."
def play(self):
if self.playlist.len() > 0:
if not(self.prun):
self.openPlayer()
self.send("LOAD %s" % self.playlist.get_path())
self.playing = True
return "Started playing"
else:
self.playing = False
return "Cannot play, empty playlist."
def stop(self):
self.playing = False
self.stopPlayer()
return "Playback stopped."
def next(self):
if self.playlist.next() and self.playing:
self.play()
return "Now playing item %d: %s - %s" % (self.playlist.cursor+1,self.playlist[self.playlist.cursor].artist,self.playlist[self.playlist.cursor].title)
else:
self.stop()
try:
return "Moved cursor to item %d: %s - %s" % (self.playlist.cursor+1,self.playlist[self.playlist.cursor].artist,self.playlist[self.playlist.cursor].title)
except IndexError:
return "Can't move cursor, empty playlist"
def prev(self):
self.playlist.prev(self.playing)
if self.playing:
self.play()
return "Moved to item: %s" % self.playlist.cursor + 1
def jump(self,cursor):
if self.playlist.jump(cursor):
if self.playing:
self.play()
return "Jumped to %s" % cursor
else:
return "Error: [%r] is not a valid playlist track number" % cursor
