blocks|key|4459714|text|在我的环境中，我运行了dbus和pulseaudio，但是发现的地址不存在：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4459715|>>>+import+dbus
>>>+import+dbus.mainloop.glib
>>>+from+gi.repository+import+GObject
>>>+dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
<dbus.mainloop.NativeMainLoop+object+at+0x7f3c98ffd4e0>
>>>+bus+=+dbus.SessionBus()
>>>+server_lookup+=+bus.get_object("org.PulseAudio1",+"/org/pulseaudio/server_lookup1")
>>>+address+=+server_lookup.Get("org.PulseAudio.ServerLookup1",+"Address",+dbus_interface="org.freedesktop.DBus.Properties")
>>>+address
dbus.String('unix:path=/run/user/1000/pulse/dbus-socket',+variant_level=1)


$+dbus-monitor+--address+'unix:path=/run/user/1000/pulse/dbus-socket'
Failed+to+open+connection+to+unix:path=/run/user/1000/pulse/dbus-socket:+Failed+to+connect+to+socket+/run/user/1000/pulse/dbus-socket:+No+such+file+or+directory

$+ls+/run/user/1000/pulse/
cli++native++pid|code-block|syntax|javascript|4459716|我不知道我的配置是否是默认的，但看起来dbus集成就是不在那里！|4459717|entityMap^0|B|4|G|A|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

I my environment, I have <code>dbus</code> and <code>pulseaudio</code> running, however the discovered address does not exist:

<pre><code>&gt;&gt;&gt; import dbus
&gt;&gt;&gt; import dbus.mainloop.glib
&gt;&gt;&gt; from gi.repository import GObject
&gt;&gt;&gt; dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
&lt;dbus.mainloop.NativeMainLoop object at 0x7f3c98ffd4e0&gt;
&gt;&gt;&gt; bus = dbus.SessionBus()
&gt;&gt;&gt; server_lookup = bus.get_object("org.PulseAudio1", "/org/pulseaudio/server_lookup1")
&gt;&gt;&gt; address = server_lookup.Get("org.PulseAudio.ServerLookup1", "Address", dbus_interface="org.freedesktop.DBus.Properties")
&gt;&gt;&gt; address
dbus.String('unix:path=/run/user/1000/pulse/dbus-socket', variant_level=1)


$ dbus-monitor --address 'unix:path=/run/user/1000/pulse/dbus-socket'
Failed to open connection to unix:path=/run/user/1000/pulse/dbus-socket: Failed to connect to socket /run/user/1000/pulse/dbus-socket: No such file or directory

$ ls /run/user/1000/pulse/
cli native pid
</code></pre>

I don't know if my configuration is default, but it seems dbus integration is just not there!

blocks|key|4459728|text|试试这个，对我很管用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4459729|import+dbus
import+os
from+dbus.mainloop.glib+import+DBusGMainLoop
import+gobject
def+pulse_bus_address():
++++if+'PULSE_DBUS_SERVER'+in+os.environ:
++++++++address+=+os.environ['PULSE_DBUS_SERVER']
++++else:
++++++++bus+=+dbus.SessionBus()
++++++++server_lookup+=+bus.get_object("org.PulseAudio1",+"/org/pulseaudio/server_lookup1")
++++++++address+=+server_lookup.Get("org.PulseAudio.ServerLookup1",+"Address",+dbus_interface="org.freedesktop.DBus.Properties")
++++++++print(address)

++++return+address

def+sig_handler(state):
++++print("State+changed+to+%25s"+%25+state)
++++if+state+==+0:
++++++++print("Pulseaudio+running.")
++++elif+state+==+1:
++++++++print("Pulseaudio+idle.")
++++elif+state+==+2:
++++++++print("Pulseaudio+suspended")

#+setup+the+glib+mainloop

DBusGMainLoop(set_as_default=True)

loop+=+gobject.MainLoop()

pulse_bus+=+dbus.connection.Connection(pulse_bus_address())
pulse_core+=+pulse_bus.get_object(object_path='/org/pulseaudio/core1')
pulse_core.ListenForSignal('org.PulseAudio.Core1.Device.StateUpdated',+dbus.Array(signature='o'),+dbus_interface='org.PulseAudio.Core1')

pulse_bus.add_signal_receiver(sig_handler,+'StateUpdated')
loop.run()|code-block|syntax|javascript|4459730|需要pulseaudio的default.pa具有以下内容：|4459731|.ifexists+module-dbus-protocol.so
load-module+module-dbus-protocol
.endif|4459732|编辑:对于那些想知道@conf-f-use关于应用程序名称的问题的人。事实证明，他们自己回答了这个问题，并在这里发布了答案：https://askubuntu.com/questions/906160/is-there-a-way-to-detect-whether-a-skype-call-is-in-progress-dbus-pulseaudio|offset|length|4459733|窃取@con-f-use的一段代码并应用到我上面的代码中，我们得到了一个监视器，它可以跟踪状态，并能够告诉您正在播放的应用程序名称、艺术家、标题和名称。|4459734|Cheers+@con-f-use+:)|4459735|import+dbus
import+os
from+dbus.mainloop.glib+import+DBusGMainLoop
import+gobject
def+pulse_bus_address():
++++if+'PULSE_DBUS_SERVER'+in+os.environ:
++++++++address+=+os.environ['PULSE_DBUS_SERVER']
++++else:
++++++++bus+=+dbus.SessionBus()
++++++++server_lookup+=+bus.get_object("org.PulseAudio1",+"/org/pulseaudio/server_lookup1")
++++++++address+=+server_lookup.Get("org.PulseAudio.ServerLookup1",+"Address",+dbus_interface="org.freedesktop.DBus.Properties")
++++++++print(address)

++++return+address

#+convert+byte+array+to+string
def+dbus2str(db):
++++if+type(db)==dbus.Struct:
++++++++return+str(tuple(dbus2str(i)+for+i+in+db))
++++if+type(db)==dbus.Array:
++++++++return+"".join([dbus2str(i)+for+i+in+db])
++++if+type(db)==dbus.Dictionary:
++++++++return+dict((dbus2str(k),+dbus2str(v))+for+k,+v+in+db.items())
++++if+type(db)==dbus.String:
++++++++return+db%2B''
++++if+type(db)==dbus.UInt32:
++++++++return+str(db%2B0)
++++if+type(db)==dbus.Byte:
++++++++return+chr(db)
++++if+type(db)==dbus.Boolean:
++++++++return+db==True
++++if+type(db)==dict:
++++++++return+dict((dbus2str(k),+dbus2str(v))+for+k,+v+in+db.items())
++++return+"(%25s:%25s)"+%25+(type(db),+db)

def+sig_handler(state):
++++print("State+changed+to+%25s"+%25+state)
++++if+state+==+0:
++++++++print("Pulseaudio+running.")
++++elif+state+==+1:
++++++++print("Pulseaudio+idle.")
++++elif+state+==+2:
++++++++print("Pulseaudio+suspended")

++++dbus_pstreams+=+(
++++++++dbus.Interface(
++++++++++++pulse_bus.get_object(object_path=path),
++++++++++++dbus_interface='org.freedesktop.DBus.Properties'
++++++++)+for+path+in+pulse_core.Get(
++++++++++++'org.PulseAudio.Core1',
++++++++++++'PlaybackStreams',
++++++++++++dbus_interface='org.freedesktop.DBus.Properties'+)
++++++++)
++++pstreams+=+{}
++++for+pstream+in+dbus_pstreams:
++++++++try:
++++++++++++pstreams[pstream.Get('org.PulseAudio.Core1.Stream',+'Index')]+=++pstream
++++++++except+dbus.exceptions.DBusException:
++++++++++++pass
++++if+pstreams:
++++++++for+stream+in+pstreams.keys():
++++++++++++plist+=+pstreams[stream].Get('org.PulseAudio.Core1.Stream',+'PropertyList')
++++++++++++appname+=+dbus2str(plist.get('application.name',+None))
++++++++++++artist+=+dbus2str(plist.get('media.artist',+None))
++++++++++++title+=+dbus2str(plist.get('media.title',+None))
++++++++++++name+=+dbus2str(plist.get('media.name',+None))
++++++++++++print+appname,artist,title,name


#+setup+the+glib+mainloop

DBusGMainLoop(set_as_default=True)

loop+=+gobject.MainLoop()

pulse_bus+=+dbus.connection.Connection(pulse_bus_address())
pulse_core+=+pulse_bus.get_object(object_path='/org/pulseaudio/core1')
#pulse_clients+=+pulse_bus.get_object(object_path='/org/pulseaudio/core1/Clients')
#print+dir(pulse_clients)
pulse_core.ListenForSignal('org.PulseAudio.Core1.Device.StateUpdated',+dbus.Array(signature='o'),+dbus_interface='org.PulseAudio.Core1')

pulse_bus.add_signal_receiver(sig_handler,+'StateUpdated')
loop.run()|4459736|entityMap|0|LINK|mutability|MUTABLE|url|https://askubuntu.com/questions/906160/is-there-a-way-to-detect-whether-a-skype-call-is-in-progress-dbus-pulseaudio^0|0|0|0|0|1Q|37|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@]|9|@$M|17|N|18|1|19]]|A|$]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

Try this, works for me.

<pre><code>import dbus
import os
from dbus.mainloop.glib import DBusGMainLoop
import gobject
def pulse_bus_address():
 if 'PULSE_DBUS_SERVER' in os.environ:
 address = os.environ['PULSE_DBUS_SERVER']
 else:
 bus = dbus.SessionBus()
 server_lookup = bus.get_object("org.PulseAudio1", "/org/pulseaudio/server_lookup1")
 address = server_lookup.Get("org.PulseAudio.ServerLookup1", "Address", dbus_interface="org.freedesktop.DBus.Properties")
 print(address)

 return address

def sig_handler(state):
 print("State changed to %s" % state)
 if state == 0:
 print("Pulseaudio running.")
 elif state == 1:
 print("Pulseaudio idle.")
 elif state == 2:
 print("Pulseaudio suspended")

# setup the glib mainloop

DBusGMainLoop(set_as_default=True)

loop = gobject.MainLoop()

pulse_bus = dbus.connection.Connection(pulse_bus_address())
pulse_core = pulse_bus.get_object(object_path='/org/pulseaudio/core1')
pulse_core.ListenForSignal('org.PulseAudio.Core1.Device.StateUpdated', dbus.Array(signature='o'), dbus_interface='org.PulseAudio.Core1')

pulse_bus.add_signal_receiver(sig_handler, 'StateUpdated')
loop.run()
</code></pre>

Requires pulseaudio's default.pa to have the following: 

<pre><code>.ifexists module-dbus-protocol.so
load-module module-dbus-protocol
.endif
</code></pre>

Edit:
for those wondering about @conf-f-use's question concerning the application name. It turns out that they answered this issue themselves and posted the answer here: <a href="https://askubuntu.com/questions/906160/is-there-a-way-to-detect-whether-a-skype-call-is-in-progress-dbus-pulseaudio">https://askubuntu.com/questions/906160/is-there-a-way-to-detect-whether-a-skype-call-is-in-progress-dbus-pulseaudio</a> 
Stealing a section of @con-f-use's code and applying to my code above, we get a monitor that tracks what the state is and is able to tell you the application name, the artist, title and name of what is playing. 
Cheers @con-f-use :)

<pre><code>import dbus
import os
from dbus.mainloop.glib import DBusGMainLoop
import gobject
def pulse_bus_address():
 if 'PULSE_DBUS_SERVER' in os.environ:
 address = os.environ['PULSE_DBUS_SERVER']
 else:
 bus = dbus.SessionBus()
 server_lookup = bus.get_object("org.PulseAudio1", "/org/pulseaudio/server_lookup1")
 address = server_lookup.Get("org.PulseAudio.ServerLookup1", "Address", dbus_interface="org.freedesktop.DBus.Properties")
 print(address)

 return address

# convert byte array to string
def dbus2str(db):
 if type(db)==dbus.Struct:
 return str(tuple(dbus2str(i) for i in db))
 if type(db)==dbus.Array:
 return "".join([dbus2str(i) for i in db])
 if type(db)==dbus.Dictionary:
 return dict((dbus2str(k), dbus2str(v)) for k, v in db.items())
 if type(db)==dbus.String:
 return db+''
 if type(db)==dbus.UInt32:
 return str(db+0)
 if type(db)==dbus.Byte:
 return chr(db)
 if type(db)==dbus.Boolean:
 return db==True
 if type(db)==dict:
 return dict((dbus2str(k), dbus2str(v)) for k, v in db.items())
 return "(%s:%s)" % (type(db), db)

def sig_handler(state):
 print("State changed to %s" % state)
 if state == 0:
 print("Pulseaudio running.")
 elif state == 1:
 print("Pulseaudio idle.")
 elif state == 2:
 print("Pulseaudio suspended")

 dbus_pstreams = (
 dbus.Interface(
 pulse_bus.get_object(object_path=path),
 dbus_interface='org.freedesktop.DBus.Properties'
 ) for path in pulse_core.Get(
 'org.PulseAudio.Core1',
 'PlaybackStreams',
 dbus_interface='org.freedesktop.DBus.Properties' )
 )
 pstreams = {}
 for pstream in dbus_pstreams:
 try:
 pstreams[pstream.Get('org.PulseAudio.Core1.Stream', 'Index')] = pstream
 except dbus.exceptions.DBusException:
 pass
 if pstreams:
 for stream in pstreams.keys():
 plist = pstreams[stream].Get('org.PulseAudio.Core1.Stream', 'PropertyList')
 appname = dbus2str(plist.get('application.name', None))
 artist = dbus2str(plist.get('media.artist', None))
 title = dbus2str(plist.get('media.title', None))
 name = dbus2str(plist.get('media.name', None))
 print appname,artist,title,name


# setup the glib mainloop

DBusGMainLoop(set_as_default=True)

loop = gobject.MainLoop()

pulse_bus = dbus.connection.Connection(pulse_bus_address())
pulse_core = pulse_bus.get_object(object_path='/org/pulseaudio/core1')
#pulse_clients = pulse_bus.get_object(object_path='/org/pulseaudio/core1/Clients')
#print dir(pulse_clients)
pulse_core.ListenForSignal('org.PulseAudio.Core1.Device.StateUpdated', dbus.Array(signature='o'), dbus_interface='org.PulseAudio.Core1')

pulse_bus.add_signal_receiver(sig_handler, 'StateUpdated')
loop.run()
</code></pre>

I'm trying to get a D-Bus signal handler to be called whenever the state of a sink changes in PulseAudio (e.g. becomes inactive). Unfortunately, it isn't being called and I frankly am not sure why.

<pre class="lang-python prettyprint-override"><code>import dbus
import dbus.mainloop.glib
from gi.repository import GObject


dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SessionBus()


def signal_handler(*args, **kwargs):
 print('sig: ', args, kwargs)


def connect():
 import os
 if 'PULSE_DBUS_SERVER' in os.environ:
 address = os.environ['PULSE_DBUS_SERVER']
 else:
 bus = dbus.SessionBus()
 server_lookup = bus.get_object("org.PulseAudio1", "/org/pulseaudio/server_lookup1")
 address = server_lookup.Get("org.PulseAudio.ServerLookup1", "Address", dbus_interface="org.freedesktop.DBus.Properties")

 return dbus.connection.Connection(address)


conn = connect()
core = conn.get_object(object_path='/org/pulseaudio/core1')
core.connect_to_signal('StateUpdated', signal_handler)
core.ListenForSignal('org.PulseAudio.Core1.Device.StateUpdated', dbus.Array(signature='o'), dbus_interface='org.PulseAudio.Core1')
loop = GObject.MainLoop()
loop.run()
</code></pre>

Getting signals working on PulseAudio's DBus interface?

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我正在尝试获取一个D-Bus信号处理程序，以便在PulseAudio中接收器的状态发生变化(例如变为非活动状态)时被调用。不幸的是，它没有被调用，坦率地说，我不确定为什么。import dbusimport dbus.mainloop.glibfrom gi.repository import GObjectdbus....

问在PulseAudio的DBus接口上获得工作信号？
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