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from PyQt4 import QtCore
import mpd
import socket
from song import Song
class MPClient(QtCore.QObject):
"""This class offers another layer above pympd, with usefull events."""
_client = None
_cur_lib = None
_cur_playlist = None
_cur_song = None
_status = {'volume' : None, 'repeat' : None, 'random' : None,
'songid' : None, 'playlist' : None, 'playlistlength' : None,
'state' : None, 'time' : None, 'length' : None,
'xfade' : None, 'updatings_db' : None}
_timer_id = None
_retr_mutex = QtCore.QMutex()
def __init__(self):
QtCore.QObject.__init__(self)
self._cur_lib = []
self._cur_playlist = []
def connect_mpd(self, host, port):
"""Connect to MPD@host:port. Returns Tue at success, False otherwise."""
if self._client:
return True
try:
self._client = mpd.MPDClient()
self._client.connect(host, port)
except socket.error:
self._client = None
return False
self._status = MPClient._status
self._update_lib()
self._update_playlist()
self._update_current_song()
self.emit(QtCore.SIGNAL('connected'))
self.timerEvent(None)
self._timer_id = self.startTimer(500)
return True
def disconnect_mpd(self):
"""Disconnect from MPD."""
if self._client:
self._client.close()
self._client.disconnect()
self._client = None
def is_connected(self):
"""Returns True if connected to MPD, False otherwise."""
return self._client != None
def playlist(self):
"""Returns the current playlist."""
if not self.is_connected():
return []
return self._cur_playlist
def library(self):
"""Returns current library."""
if not self.is_connected():
return []
return self._cur_lib
def current_song(self):
"""Returns the current playing song."""
if not self.is_connected():
return None
return self._cur_song
def status(self):
"""Get current MPD status."""
return self._status
def update_db(self, paths = None):
"""Starts MPD database update."""
if not paths:
return self._client.update()
self._client.command_list_ok_begin()
for path in paths:
self._client.update(path)
self._client.command_list_end()
def outputs(self):
"""Returns an array of configured MPD audio outputs."""
if self.is_connected():
return self._retrieve(self._client.outputs)
else:
return []
def set_output(self, output_id, state):
"""Set audio output output_id to state (0/1)."""
if state:
self._client.enableoutput(output_id)
else:
self._client.disableoutput(output_id)
def urlhandlers(self):
"""Returns an array of available url handlers."""
if not self.is_connected():
return []
else:
return self._client.urlhandlers()
def repeat(self, val):
"""Set repeat playlist to val (True/False)."""
if isinstance(val, bool):
val = 1 if val else 0
self._client.repeat(val)
def random(self, val):
"""Set random playback to val (True, False)."""
if isinstance(val, bool):
val = 1 if val else 0
self._client.random(val)
def is_playing(self):
"""Returns True if MPD is playing, False otherwise."""
return self.status()['state'] == 'play'
def play(self, id = None):
"""Play song with ID id or next song if id is None."""
self._playCalled = True
if id:
self._client.playid(id)
else:
self._client.playid()
def pause(self):
"""Pause playing."""
self._client.pause(1)
def resume(self):
"""Resume playing."""
self._client.pause(0)
def next(self):
"""Move on to the next song in the playlist."""
self._playCalled = False
self._client.next()
def previous(self):
"""Move back to the previous song in the playlist."""
self._client.previous()
def stop(self):
"""Stop playing."""
self._client.stop()
def seek(self, time):
"""Seek to time."""
if self._status and self._status['songid'] > 0:
self._client.seekid(self._status['songid'], time)
def delete(self, list):
"""Remove all song IDs in list from the playlist."""
self._client.command_list_ok_begin()
for id in list:
self._client.deleteid(id)
self._client.command_list_end()
self._update_playlist()
def clear(self):
"""Clear current playlist."""
self._client.clear()
self._update_playlist()
def add(self, paths):
"""Add all files in paths to the current playlist."""
try:
self._client.command_list_ok_begin()
for path in paths:
self._client.addid(path.encode('utf-8'))
ret = self._client.command_list_end()
self._update_playlist()
if self._status['state'] == 'stop':
self.play(ret[0])
except mpd.CommandError:
logging.error('Cannot add some files, check permissions.')
def volume(self):
return int(self.status()['volume'])
def set_volume(self, volume):
"""Set volume to volume."""
volume = min(100, max(0, volume))
self._client.setvol(volume)
def _retrieve(self, method):
"""Makes sure only one call is made at a time to MPD."""
self._retr_mutex.lock()
try:
ret = method()
except socket.error:
self._retr_mutex.unlock()
self._client = None
return None
self._retr_mutex.unlock()
return ret
def _update_lib(self):
"""Update the cached library."""
self._cur_lib = self._array_to_song_array(self._retrieve(self._client.listallinfo))
id = 0
for song in self._cur_lib:
song._data['id'] = id
id += 1
def _update_playlist(self):
"""Update the cached playlist."""
self._cur_playlist = self._array_to_song_array(self._retrieve(self._client.playlistinfo))
def _array_to_song_array(self, array):
"""Convert an array to an array of Songs."""
return map(lambda entry: Song(entry)
, filter(lambda entry: not('directory' in entry), array)
)
def _update_current_song(self):
"""Update the current song."""
song = self._retrieve(self._client.currentsong)
if not song:
self._cur_song = None
else:
self._cur_song = Song(song)
def _update_status(self):
"""Get current status"""
if self.is_connected() == False:
return None
ret = self._retrieve(self._client.status)
if not ret:
return None
ret['repeat'] = int(ret['repeat'])
ret['random'] = int(ret['random'])
if 'time' in ret:
cur, len = ret['time'].split(':')
ret['length'] = int(len)
ret['time'] = int(cur)
else:
ret['length'] = 0
ret['time'] = 0
if not 'updatings_db' in ret:
ret['updatings_db'] = 0
if not 'songid' in ret:
ret['songid'] = -1
return ret
def timerEvent(self, event):
"""Check for changes since last check."""
old_status = self._status
self._status = self._update_status()
if not self._status:
self._client = None
self.emit(QtCore.SIGNAL('disconnected'))
self.killTimer(self._timer_id)
return
self._update_current_song()
if self._status['songid'] != old_status['songid']:
self.emit(QtCore.SIGNAL('song_changed'), self._status['songid'])
if self._status['time'] != old_status['time']:
self.emit(QtCore.SIGNAL('time_changed'), self._status['time'])
if self._status['state'] != old_status['state']:
self.emit(QtCore.SIGNAL('state_changed'), self._status['state'])
if self._status['volume'] != old_status['volume']:
self.emit(QtCore.SIGNAL('volume_changed'), int(self._status['volume']))
if self._status['repeat'] != old_status['repeat']:
self.emit(QtCore.SIGNAL('repeat_changed'), bool(self._status['repeat']))
if self._status['random'] != old_status['random']:
self.emit(QtCore.SIGNAL('random_changed'), bool(self._status['random']))
if self._status['playlist'] != old_status['playlist']:
self._update_playlist()
self.emit(QtCore.SIGNAL('playlist_changed'))
if self._status['updatings_db'] and not old_status['updatings_db']:
self.emit(QtCore.SIGNAL('update_started'))
if not self._status['updatings_db'] and old_status['updatings_db']:
self.emit(QtCore.SIGNAL('update_finished'))
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