Re: bluetooth headset audio

[Takashi Iwai <tiwai@suse.de>]

At Wed, 29 Sep 2004 21:41:15 -0600,
Brad Midgley wrote:
> 
> Hi
> 
> I am working with the group doing bluetooth audio. 
> (http://sourceforge.net/projects/bluetooth-alsa/)
> 
> Right now we have alsa patches to add a bluetooth alsa device to the 
> kernel. It works in conjunction with a userspace bluetooth daemon. It's 
> not ideal. For one thing, we should be able to support multiple 
> bluetooth headsets at once but that would require more kernel changes.
> 
> Is there any way to have an alsa sound driver that lives mostly in 
> userspace?

Yes, you can write a dedicated plugin of alsa-lib.


>  If there was something like that, we could load up one driver 
> for each headset we wanted to support. We have to route things through 
> userspace anyway to use the bluetooth device. It might also be easier to 
> get patches accepted. :)

Patches to drivers are welcome, too :)

The reason I don't take the current bt-sco driver is the design
problem as you wrote above.  We should implement either only on
user-space or on kernel-space.

I recently talked with Marcel Holtmann, and he suggested to write
rather a kernel driver.  I'd like to develop it when I have some time
later.


Takashi


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