Bluetooth backends in Firefox OS v3

[Thomas Zimmermann]

Hi,

I just want to send out some plans that I have for Bluetooth's back-end
code in v3. The current back-end code is a mixture of different APIs for
supporting BlueZ, Bluedroid and bluetoothd; and I feel that BlueZ will
hold us back soon. I want to unify and clean up all this code.

1) While BlueZ code is aging quickly, I don't want to remove it. That
would leave older devices without any Bluetooth support. I have been
working on bug 1088574 [1] for implementing BlueZ support behind Gecko's
interface for Bluedroid and bluetoothd (the code in
BluetoothInterface.{cpp,h}). It's far from being finished, but it can
switch on BlueZ and discover devices. Pairing is next on my list. I want
to offer basic APIs, OPP and HFP. I don't own A2DP devices, so
supporting this will be harder. QA will be needed for this code as well.

2) After the new BlueZ code landed, I intend to remove the old BlueZ
code completely. A quick check with 'sloccount' shows that this would
remove ~22% of obsolete code. The new BlueZ code will run with service
and profile managers from the bluedroid/ directory.

3) At this point, service classes and profile managers will be located
in the bluedroid/ directory. So we can merge them into the generic code,
which should make the overall code base easier to understand and maintain.

4) Finally, I want to go over the back-end interfaces, for more
optimizations, cleanups, features, etc.

Please share your comments, concerns, ideas about these plans.

Best regards
Thomas