[pulseaudio-discuss] Issues with Python Bluetooth sockets

[Matthias Mirbeth]

Hi,

I'm currently trying simulate a SCO connection for the bluetooth module of pulseaudio, without any BT device connected.
Therefore I have recreated a part of ofonos DBus API in Python. The DBus communication is working and I can pass a file descriptor to pulseaudio as return value of "Acquire".
But I still have some issues with the setup of the bluetooth socket.

I create the socket like:
self.soc = socket.socket(socket.AF_BLUETOOTH,
                                                           socket.SOCK_SEQPACKET | socket.SOCK_CLOEXEC | socket.SOCK_NONBLOCK,
                                                           socket.BTPROTO_SCO) #These params are taken from ofono
self.soc.bind(self.address)
fd = self.soc.fileno() #fd will be sent to Pulseaudio

But then calling accept() or connect() on the socket (in my script) will result in an Error.
Only when i don't set the socket to non-blocking, connect() does not throw an error, but it blocks endlessly.

>From Pulseaudio I the following Log messages:

without calling connect():
319 D: [bluetooth] module-bluez5-device.c: Stream properly set up, we're ready to roll! (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f915c40cf67])
320 E: [bluetooth] module-bluez5-device.c: Failed to write data to SCO socket: Transport endpoint is not connected (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f915c40cf67])
321 D: [bluetooth] module-bluez5-device.c: IO thread failed (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f915c40cf67])

or
306 D: [bluetooth] module-bluez5-device.c: Stream properly set up, we're ready to roll! (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f5d8303ff67])
307 I: [bluetooth] module-bluez5-device.c: FD error: POLLHUP  (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f5d8303ff67])
308 D: [pulseaudio] sink.c: bluez_sink.B8_27_EB_FF_15_F9.headset_head_unit: state: INIT -> IDLE (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f5d8303ff67])
309 D: [bluetooth] module-bluez5-device.c: Audio stream torn down (libpulsecommon-12.0.so(pa_log_levelv_meta+0x8b7) [0x7f5d8303ff67])
when my program is stuck in socket.connect()

I have also tried to use a BluetoothSocket from PyBluez with similar results.
Can someone please help me to set the socket up properly?

Best regards
Matthias Mirbeth

Mit freundlichen Grüßen * Best regards

Matthias Mirbeth
Bachelorand
T. +49 (0)841 88390-5169
Expleo Germany GmbH * Despagstraße 4 * 85055 Ingolstadt * Germany

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