[pulseaudio-discuss] Bluetooth aptX codec

Luiz Augusto von Dentz luiz.dentz at gmail.com
Fri Jul 20 11:30:56 UTC 2018

Hi Pali,

On Wed, Jul 11, 2018 at 11:07 AM, Pali Rohár <pali.rohar at gmail.com> wrote:
> On Monday 09 July 2018 17:56:16 Pali Rohár wrote:
>> On Monday 09 July 2018 18:48:10 Luiz Augusto von Dentz wrote:
>> > > 2) How should codec switching from pulseaudio API and pactl/pavucontrol
>> > > looks like?
>> >
>> > Usually we don't force reconfiguration but perhaps we should, note
>> > though that we may end up with audio glitches since we have to
>> > disconnect A2DP stream to be able to reconfigure it with another
>> > codec.
>> Glitches are already there if you switch from A2DP profile to HSP in
>> pavucontrol. So I do not see any problem if glitches happen also when
>> switching between A2DP (SBC) and A2DP (aptX).
>> > We would probably have to expose each endpoint so you could
>> > peek and choose what the codec to use.
>> Yes. I think this is required when pulseaudio is going to support more
>> then one codec.
> So when this will happen? As for now this is blocker for proper support
> of multiple codecs in pulseaudio.
> We need some dbus method call which will tell bluez which endpoint
> (registered by pulseaudio) should be used now for particular bluetooth
> A2DP device.

I can give you some pointers on how to expose the endpoints with
MediaEndpoint interface.

Luiz Augusto von Dentz

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