作为一个简单的总结,我目前正在构建一个树莓pi,它能够充当蓝牙a2dp接收器,并将音频路由到3.5m m的连接。
我运行的其中一个python脚本使用bluez和dbus与蓝牙设备通信,此时我正在使用的脚本发现一个bt设备以前与系统配对并自动连接到它(脚本在cron上运行),然后我可以按iphone上的play启动音频流。不过,我想做的是一旦它找到一个设备,并连接发送一个dbus命令开始音频播放,而不是必须手动按播放手机本身。
这是代码的一个摘录,以及我所做的努力,以使它工作,但没有运气。
bus = dbus.SystemBus()
#Get bluez dbus objects
man = bus.get_object('org.bluez', '/')
iface = dbus.Interface(man, 'org.bluez.Manager')
adapterPath = iface.DefaultAdapter()
adapter = dbus.Interface(bus.get_object('org.bluez', adapterPath),dbus_interface='org.bluez.Adapter')
devices = adapter.GetProperties()['Devices']
#for each device on this bluetooth adapter look for ones with A2DP sink service UUID and
# register for the propertychanged dbus signal
for d in devices:
dev = dbus.Interface(bus.get_object('org.bluez', d),dbus_interface='org.bluez.Device')
props = dev.GetProperties()
if any(AudioSourceServiceClass_UUID in UUID.upper() for UUID in props["UUIDs"]):
#This device is an A2DP Audio source
devobj = bus.get_object('org.bluez', d)
devobj.Trusted = True
if props["Connected"] == True:
print props["Name"] + " is connected!"
exit()
for d in devices:
dev = dbus.Interface(bus.get_object('org.bluez', d),dbus_interface='org.bluez.Device')
props = dev.GetProperties()
if any(AudioSourceServiceClass_UUID in UUID.upper() for UUID in props["UUIDs"]):
#This device is an A2DP Audio source
print props["Name"] + " has A2DP audio source"
#dev.connect_to_signal("PropertyChanged", handler_for_device(dev))
#dev.connect_to_signal("PropertyChanged", cb)
devobj = bus.get_object('org.bluez', d)
try:
devobj.Connect(dbus_interface='org.bluez.AudioSource')
devobj.Play()
exit()
except dbus.DBusException, e:
print str(e)
如果不容易看到的话,我在“devobj.play()”一行中添加了4行。
但是我得到了错误:
iPhone有A2DP音频源
OrgDeffToop.dBo.Error .UnNo.No.Mead:方法“玩”签名“接口”(NULL)不存在
最佳答案
如果您知道设备已执行此操作:
player = dbus.Interface(bus.get_object('org.bluez', '/org/bluez/hci0/dev_' + device.replace(":","_") + '/player0'), 'org.bluez.MediaPlayer1')
然后:
player.Play()
设备应为xx嫒xx嫒xx嫒xx嫒
关于linux - Linux BlueZ dbus通信a2dp,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/33329010/