[pulseaudio-discuss] [PATCH] WIP: Bluetooth A2DP aptX codec support

Pali Rohár pali.rohar at gmail.com
Sun Jul 8 20:02:51 UTC 2018

On Sunday 08 July 2018 22:55:28 Luiz Augusto von Dentz wrote:
> Hi Pali,
> On Sat, Jul 7, 2018 at 2:08 PM, Pali Rohár <pali.rohar at gmail.com> wrote:
> > On Friday 06 July 2018 11:16:09 Pali Rohár wrote:
> >> Known problems:
> >>
> >> For every A2DP codec it is needed to register endpoint to the bluez daemon.
> >> This is working fine, but I do not know how and why bluez daemon choose
> >> endpoint (and so codec) for new connection. And I have not figured out how
> >> to tell bluez daemon to switch A2DP codec from SBC to aptX and vice-versa.
> >> It looks like that bluez daemon chooses endpoint (and so codec) at
> >> connection time randomly :-(
> >
> > Any idea how to tell bluez which endpoint should use? Or how to change
> > one active bluez endpoint to another for switching bluez codec?
> It is the order PA register the endpoints, if you want apt-x take
> priority register it first.

Do you mean to call functions in this order?

register_endpoint(y, path, A2DP_SOURCE_APTX_ENDPOINT, ...);
register_endpoint(y, path, A2DP_SOURCE_SBC_ENDPOINT, ...);

No, it does not work. Still codec is somehow selected randomly.
Sometimes aptX, sometimes SBC. I tested it with one same device.

Pali Rohár
pali.rohar at gmail.com
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