2007-02-06 13:06:29

by Mark Hellman

[permalink] [raw]
Subject: Re: [Bluez-devel] Plugz with Dell inbuilt-BT

Jon Barnett wrote:

> The only problem is that skype can't use the plugz device as it doesn't
> recognize it - since it doesn't do detection of available pcm devices.

>>From a user's perspective that is, in my opinion, the main problem with
using plugz instead of btsco. Skype and Ekiga are the reasons why 90% of
users want to install plugz.

Is this an ALSA limitation, or isn't Skype using the right functions from
the ALSA's API to enumerate all available devices? Who must be fixes: Skype
of ALSA?
Could some developer enlighten us on this issue?

Thanks,
Mark


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2007-02-08 16:54:33

by Jon Barnett

[permalink] [raw]
Subject: Re: [Bluez-devel] Plugz with Dell inbuilt-BT

The problem with the bt-hijacker approach is that it is based on the
snd-bt-sco module which creates the necessary /dev/dspX entry for
re-routing sound. The plugz approach doesn't result in the creation of
a /dev/dspX. So the hijacker can't reroute the sound as far as I can
see. Or am I missing something?

Cheers,

JonB

On Thu, 2007-02-08 at 15:42 +0100, Fabien Chevalier wrote:
> Hi,
>
> Mark Hellman wrote:
> > Jon Barnett wrote:
> >
> >> The only problem is that skype can't use the plugz device as it doesn't
> >> recognize it - since it doesn't do detection of available pcm devices.
> >
> >>From a user's perspective that is, in my opinion, the main problem with
> > using plugz instead of btsco. Skype and Ekiga are the reasons why 90% of
> > users want to install plugz.
> >
> > Is this an ALSA limitation, or isn't Skype using the right functions from
> > the ALSA's API to enumerate all available devices? Who must be fixes: Skype
> > of ALSA?
>
> Thing is : sadly, there is no ALSA function to enumerate available PCMs
> on the system. There are only features to enumerate hardware cards.
> That's a known ALSA weakness, but this is how things are as of to today
> in Linux world :-(
>
> > Could some developer enlighten us on this issue?
>
> Just use Skype in OSS mode, and use skype_bt_hijacker available in
> contrib directory to redirect sound to ALSA headset. I haven't tested it
> myself recently, but theorically this should work.
>
> Cheers,
>
> Fabien
>
>
>


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2007-02-08 14:42:42

by Fabien Chevalier

[permalink] [raw]
Subject: Re: [Bluez-devel] Plugz with Dell inbuilt-BT

Hi,

Mark Hellman wrote:
> Jon Barnett wrote:
>
>> The only problem is that skype can't use the plugz device as it doesn't
>> recognize it - since it doesn't do detection of available pcm devices.
>
>>>From a user's perspective that is, in my opinion, the main problem with
> using plugz instead of btsco. Skype and Ekiga are the reasons why 90% of
> users want to install plugz.
>
> Is this an ALSA limitation, or isn't Skype using the right functions from
> the ALSA's API to enumerate all available devices? Who must be fixes: Skype
> of ALSA?

Thing is : sadly, there is no ALSA function to enumerate available PCMs
on the system. There are only features to enumerate hardware cards.
That's a known ALSA weakness, but this is how things are as of to today
in Linux world :-(

> Could some developer enlighten us on this issue?

Just use Skype in OSS mode, and use skype_bt_hijacker available in
contrib directory to redirect sound to ALSA headset. I haven't tested it
myself recently, but theorically this should work.

Cheers,

Fabien


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