Re: [Bluez-devel] btsco2

Bluetooth
2004-12-01T21:51:03Z

Brad Midgley wrote:

> Thomas
>
>> Currently there is no support for multiple headset because of missing
>> arguments. It was an open question how it should be done.
>
>
> to actually answer the question, this looks best:
>
> - ./btsco2 <mac1> -1 <mac2> 1 <mac3> 2
> Where -1 in the Channel Parameter stand for Autodetec
>
> because I'm not sure the autodetect will always work. Can we use '0'
> instead of '-1' for autodetect though? -1 looks like a flag.

Hm than better 'a' because i think that even 0 is an valid channel.

> If we combine the a2dp and sco support, then we need to use
> alsa-lib/aserver because it requires userspace audio processing.
>
> If you want a voip application to work seamlessly with the headset, to
> make the headset ring on an incoming call for example, we need some
> kind of signaling like dbus.
>
> We can continue to maintain a daemon that does not support these
> features and works well for embeded systems. What applications will
> you use the headset with and how will they start/stop/detect connections?

Currently kphone sjphone, kphone vor example try to open the dsp device
on inbound or outbond connection if we can signal btsco that dsp is open
this would be sufficent or not ?

> the kernel needs changes in bluez.
>
> Marcel explained it once: "To get more than one SCO channel working
> the hci_usb driver must be fixed to dynamicaly change the alternate
> settting."
>
> again, I don't know SCO well enough to understand this, but it sounds
> fundamental.
>
> the btsco in the kernel also needs to be changed to allow for multiple
> simultaneous audio streams.

Hm sounds bad :-(

Cu Thomas