Other types of usb audio devices.

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Hi,

The current snd-usb-audio driver assumes that the audio device is 
attached to this computer, so it only talks to this endpoint.
If I have an audio usb device with USB_CLASS = 0xe0, it will be a 
wireless device. I.E. A bluetooth headset.
It uses isoc's just like the current snd-usb-audio driver but adds some 
extra requirements, in order to open a connection, one needs to also 
know the bd address of the destination device  (Like a MAC address for 
ethernet) and keep tabs of connection number.
The current bluetooth stack I am using is bluez, from the current 2.4.20 
  kernel, and it uses network sockets for the audio. I would prefer to 
use alsa for sending and receiving audio to/from the headset, with all 
other control of the device going via the bluetooth stack.
So the question is: -
How do I get the bdaddr to alsa so that an application can use 
snd_pcm_open with the bluetooth headset, just as if it was a local audio 
card.
I will probably be writing a new usb-audio.c file and probably call it 
usb-wireless.c in order to handle all the bluetooth specific stuff.

Cheers
James



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