Headless A2DP Audio Streaming on Raspbian Stretch

README.md

Info

This is a forked gist from @mill1000 for the sole purpose of usage in https://github.com/hahagu/rpi-headless-a2dp

a2dp-agent

#!/usr/bin/python

from __future__ import absolute_import, print_function, unicode_literals

import sys
import dbus
import dbus.service
import dbus.mainloop.glib
try:
  from gi.repository import GObject
except ImportError:
  import gobject as GObject

AGENT_INTERFACE = "org.bluez.Agent1"
AGENT_PATH = "/test/agent"
  
class Rejected(dbus.DBusException):
	_dbus_error_name = "org.bluez.Error.Rejected"

class Agent(dbus.service.Object):
	exit_on_release = True

	def set_exit_on_release(self, exit_on_release):
		self.exit_on_release = exit_on_release

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="", out_signature="")
	def Release(self):
		print("Release")
		if self.exit_on_release:
			mainloop.quit()

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="os", out_signature="")
	def AuthorizeService(self, device, uuid):
		print("AuthorizeService (%s, %s)" % (device, uuid))
                if uuid == "0000110d-0000-1000-8000-00805f9b34fb":
                    print("Authorized A2DP Service")
                    return
                print("Rejecting non-A2DP Service")
		raise Rejected("Connection rejected")

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="o", out_signature="s")
	def RequestPinCode(self, device):
		print("RequestPinCode (%s)" % (device))
		return "0000"

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="o", out_signature="u")
	def RequestPasskey(self, device):
		print("RequestPasskey (%s)" % (device))
		return dbus.UInt32("password")

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="ouq", out_signature="")
	def DisplayPasskey(self, device, passkey, entered):
		print("DisplayPasskey (%s, %06u entered %u)" %
						(device, passkey, entered))

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="os", out_signature="")
	def DisplayPinCode(self, device, pincode):
		print("DisplayPinCode (%s, %s)" % (device, pincode))

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="ou", out_signature="")
	def RequestConfirmation(self, device, passkey):
		print("RequestConfirmation (%s, %06d)" % (device, passkey))
		return

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="o", out_signature="")
	def RequestAuthorization(self, device):
		print("RequestAuthorization (%s)" % (device))
		raise Rejected("Pairing rejected")

	@dbus.service.method(AGENT_INTERFACE,
					in_signature="", out_signature="")
	def Cancel(self):
		print("Cancel")

if __name__ == '__main__':
	dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

	bus = dbus.SystemBus()

	agent = Agent(bus, AGENT_PATH)

	obj = bus.get_object("org.bluez", "/org/bluez");
	manager = dbus.Interface(obj, "org.bluez.AgentManager1")
	manager.RegisterAgent(AGENT_PATH, "NoInputNoOutput")

	print("A2DP Agent Registered")

	manager.RequestDefaultAgent(AGENT_PATH)

	mainloop = GObject.MainLoop()
	mainloop.run()

a2dp-playback.service

[Unit]
Description=A2DP Playback
After=bluealsa.service syslog.service
Requires=bluealsa.service

[Service]
Restart=always
RestartSec=3
ExecStartPre=/bin/sleep 3
ExecStart=/usr/bin/bluealsa-aplay --profile-a2dp 00:00:00:00:00:00
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=A2DP-Playback
User=root

[Install]
WantedBy=multi-user.target

bt-agent-a2dp.service

[Unit]
Description=A2DP Bluetooth Agent
After=bluetooth.service
Wants=bluetooth.service

[Service]
ExecStart=/usr/bin/python -u /usr/local/bin/a2dp-agent
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=A2DP-Agent

[Install]
WantedBy=multi-user.target