1 # Implements playback controls
2 # Gstreamer stuff mostly snibbed from Panucci
4 # This file is part of Panucci.
5 # Copyright (c) 2008-2009 The Panucci Audiobook and Podcast Player Project
7 # Panucci is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # Panucci is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Panucci. If not, see <http://www.gnu.org/licenses/>.
29 from settings import settings
31 log = logging.getLogger(__name__)
33 class _Player(object):
34 """Defines the internal player interface"""
37 def play_url(self, filetype, uri):
41 def play_pause_toggle(self):
42 self.pause() if self.playing() else self.play()
49 def set_eos_callback(self, cb):
52 class GStreamer(_Player):
54 STATES = { gst.STATE_NULL : 'stopped',
55 gst.STATE_PAUSED : 'paused',
56 gst.STATE_PLAYING : 'playing' }
59 _Player.__init__(self)
60 self.time_format = gst.Format(gst.FORMAT_TIME)
63 self.filesrc_property = None
64 self.volume_control = None
65 self.volume_multiplier = 1.
66 self.volume_property = None
67 self.eos_callback = lambda: self.stop()
69 def play_url(self, filetype, uri):
70 if None in (filetype, uri):
75 if self.player is None:
78 self._maemo_setup_playbin2_player(uri)
79 log.debug('Using playbin2 (maemo)')
80 elif util.platform == 'maemo':
81 self._maemo_setup_playbin_player()
82 log.debug('Using playbin (maemo)')
84 self._setup_playbin_player()
85 log.debug( 'Using playbin (non-maemo)' )
87 bus = self.player.get_bus()
88 bus.add_signal_watch()
89 bus.connect('message', self._on_message)
90 self._set_volume_level(settings.volume)
92 self._set_uri_to_be_played(uri)
99 state = self.player.get_state()[1]
100 return self.STATES.get(state, 'none')
103 def _get_position_duration(self):
105 pos_int = self.player.query_position(self.time_format, None)[0]
106 dur_int = self.player.query_duration(self.time_format, None)[0]
108 log.exception('Error getting position')
109 pos_int = dur_int = 0
110 return pos_int, dur_int
113 return self.get_state() == 'playing'
118 self.player.set_state(gst.STATE_PLAYING)
122 self.player.set_state(gst.STATE_PAUSED)
126 self.player.set_state(gst.STATE_NULL)
129 def _maemo_setup_playbin2_player(self, url):
130 self.player = gst.parse_launch("playbin2 uri=%s" % (url,))
131 self.filesrc = self.player
132 self.filesrc_property = 'uri'
133 self.volume_control = self.player
134 self.volume_multiplier = 1.
135 self.volume_property = 'volume'
137 def _maemo_setup_playbin_player( self):
138 self.player = gst.element_factory_make('playbin2', 'player')
139 self.filesrc = self.player
140 self.filesrc_property = 'uri'
141 self.volume_control = self.player
142 self.volume_multiplier = 1.
143 self.volume_property = 'volume'
146 def _setup_playbin_player( self ):
147 """ This is for situations where we have a normal (read: non-maemo)
148 version of gstreamer like on a regular linux distro. """
149 self.player = gst.element_factory_make('playbin2', 'player')
150 self.filesrc = self.player
151 self.filesrc_property = 'uri'
152 self.volume_control = self.player
153 self.volume_multiplier = 1.
154 self.volume_property = 'volume'
156 def _on_decoder_pad_added(self, decoder, src_pad, sink_pad):
157 # link the decoder's new "src_pad" to "sink_pad"
158 src_pad.link( sink_pad )
160 def _get_volume_level(self):
161 if self.volume_control is not None:
162 vol = self.volume_control.get_property( self.volume_property )
163 return vol / float(self.volume_multiplier)
165 def _set_volume_level(self, value):
166 assert 0 <= value <= 1
168 if self.volume_control is not None:
169 vol = value * float(self.volume_multiplier)
170 self.volume_control.set_property( self.volume_property, vol )
172 def _set_uri_to_be_played(self, uri):
173 # Sets the right property depending on the platform of self.filesrc
174 if self.player is not None:
175 self.filesrc.set_property(self.filesrc_property, uri)
177 def _on_message(self, bus, message):
180 if t == gst.MESSAGE_EOS:
181 log.info("End of stream")
183 elif t == gst.MESSAGE_STATE_CHANGED:
184 if (message.src == self.player and
185 message.structure['new-state'] == gst.STATE_PLAYING):
186 log.info("State changed to playing")
187 elif t == gst.MESSAGE_ERROR:
188 err, debug = message.parse_error()
189 log.critical( 'Error: %s %s', err, debug )
192 def set_eos_callback(self, cb):
193 self.eos_callback = cb
195 if util.platform == 'maemo':
196 class OssoPlayer(_Player):
198 A player which uses osso-media-player for playback (Maemo-specific)
201 SERVICE_NAME = "com.nokia.osso_media_server"
202 OBJECT_PATH = "/com/nokia/osso_media_server"
203 AUDIO_INTERFACE_NAME = "com.nokia.osso_media_server.music"
206 self._on_eos = lambda: self.stop()
208 self._audio = self._init_dbus()
211 def play_url(self, filetype, uri):
212 self._audio.play_media(uri)
215 return self._state == 'playing'
217 def play_pause_toggle(self):
218 self.pause() if self.playing() else self.play()
230 def set_eos_callback(self, cb):
234 def _init_dbus(self):
235 session_bus = dbus.SessionBus()
236 oms_object = session_bus.get_object(self.SERVICE_NAME,
239 follow_name_owner_changes = True)
240 return dbus.Interface(oms_object, self.AUDIO_INTERFACE_NAME)
242 def _init_signals(self):
244 "no_media_selected": "No media selected",
245 "file_not_found": "File not found",
246 "type_not_found": "Type not found",
247 "unsupported_type": "Unsupported type",
248 "gstreamer": "GStreamer Error",
250 "device_unavailable": "Device Unavailable",
251 "corrupted_file": "Corrupted File",
252 "out_of_memory": "Out of Memory",
253 "audio_codec_not_supported": "Audio codec not supported"
256 # Connect status signals
257 self._audio.connect_to_signal( "state_changed",
258 self._on_state_changed )
259 self._audio.connect_to_signal( "end_of_stream",
260 lambda x: self._call_eos() )
262 # Connect error signals
263 for error, msg in error_signals.iteritems():
264 self._audio.connect_to_signal(error, lambda *x: self._error(msg))
266 def _error(self, msg):
272 def _on_state_changed(self, state):
273 states = ("playing", "paused", "stopped")
274 self.__state = state if state in states else 'none'
276 # PlayerBackend = OssoPlayer
278 PlayerBackend = GStreamer
280 class Playlist(object):
281 def __init__(self, items = []):
285 assert(isinstance(item, jamaendo.Track))
290 if isinstance(item, list):
292 assert(isinstance(i, jamaendo.Track))
293 self.items.extend(item)
295 self.items.append(item)
299 self._current = self._current + 1
300 return self.items[self._current]
305 self._current = self._current - 1
306 return self.items[self._current]
310 return self._current < (len(self.items)-1)
313 return self._current > 0
316 if self._current >= 0:
317 return self.items[self._current]
320 def current_index(self):
324 return len(self.items)
327 return "Playlist(%s)"%(", ".join([str(item.ID) for item in self.items]))
329 class Player(object):
331 self.backend = PlayerBackend()
332 self.backend.set_eos_callback(self._on_eos)
333 self.playlist = Playlist()
335 def play(self, playlist = None):
337 self.playlist = playlist
338 elif self.playlist is None:
339 self.playlist = Playlist()
340 if self.playlist.size():
341 if self.playlist.has_next():
342 entry = self.playlist.next()
343 log.debug("playing %s", entry)
344 self.backend.play_url('mp3', entry.mp3_url())
353 return self.backend.playing()
356 if self.playlist.has_next():
363 if self.playlist.has_prev():
364 entry = self.playlist.prev()
365 log.debug("playing %s", entry)
366 self.backend.play_url('mp3', entry.mp3_url())
372 the_player = Player() # the player instance