bluetooth headset audio

bluetooth headset audio

[Brad Midgley]

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? 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. :)

Brad


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Re: bluetooth headset audio

[Takashi Iwai]

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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