[pulseaudio-discuss] How to use "sco_sink" and "sco_source" in the bluetooth device module?
mengdong.lin at intel.com
Tue Jun 14 19:46:55 PDT 2011
Thank you so much for your guide, Tanu! Would you kindly share more details?
> > - I can set the ALSA sink & source as the "sco-sink" and
> > "sco-source", right?
> Just pass the sco-source and sco-sink arguments to
Can I set the two parameters for module-bluetooth-discover in "default.pa" ? I've not found an example to pass parameters via "default.pa" ;-(
> > - Since "sco-sink" and "sco-source" are not dynamically
> > created, so I cannot routing inputs/outputs to them by hook the
> > "SINK-PUT" or "SOURCE-PUT" event, right?
> Right. It would be good to make it possible to load those dynamically,
> though. One possibility would be to load module-alsa-sink/source from
> module-bluetooth-device when the hsp profile is activated. Or if the
> card is managed by module-alsa-card, then module-bluetooth-device could
> switch the card profile so that the appropriate devices get loaded.
for Maemon, the "sco-sink" and "sco-source" are created by module-alsa-card before Bluetooth device is connected, right?
Is "sco-sink" a different sink from normal ALSA sink? Or they are the same ALSA sink and so routing is not needed when a Bluetooth HSP headset is connected?
When the module-bluetooth-device is initialized to HSP profile, it just stores "sco-sink" and "sco-source" and does not notify module-alsa-card to prepare for data transport (see init_profile ->add sink & add source). So how can module-alsa-card know it shall make "sco-sink" and "sco-source" ready for data transport?
It would be nice to load those dynamically. How can the module-bluetooth-device find the module-alsa-card and let it change profile and created new sink/source for HSP?
And where can I find the profile list of "module-alsa-card"? I want to check whether there is a profile for alsa to support "Bluetooth hsp".
Are all the Maemo's changes merged to MeeGo? Including your fix for volume control? We want to study the code.
More information about the pulseaudio-discuss