Re: [Bluez-devel] question: what does this patch from snd-bt-sco do?

[Lars Grunewaldt <lgw@dark-reality.de>]

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Marcel Holtmann wrote:
|>If you could just supply a short code snippet that shows how to handle
|>this stuff. Right now it does not look very wise to reduce support to
|>audio 0x0060, because it seems that not many headsets support that audio
|>encoding.
|
|
| This has nothing to do with the headset, because we are talking about
| the input coding and not the air coding.

Now I'm lost again. Is there an audio transcoding somewhere in the SCO
layer, so that I could simply send PCM_S16 and the SCO layer transcodes
the audio if the headset does not support this? I mean there must be a
reason why the original snd-bt-sco developer hardcoded the 8bit format
instead of using 16 bit.

What about audio quality during transcoding? MULAW sounds much better
than PCM_S8.

I have just a hard time with "accept 0x0060 because - ."

Sorry that I don't fully understand this bluetooth stuff, I'm trying my
best here. :(

I hope I dont make anyone angry or something...

|
|
|>As soon as this works again, I'll put a new patch together and make it
|>available.
|
|
| What kind of patch? We need dynamic alternate setting adjustment for the
| hci_usb driver. Nothing else.

sorry, misunderstanding. I'll make a new version of snd-bt-sco that
builds with alsa-1.0.5a. Nothing for bluez.

I'd like to help you out with this dynamic alternate setting adjustment,
but I think I don't know enough usb and/or bluetooth mojo to do anything
usefull.

To make my headset work for now (need my "phone") I used that bad kernel
patch again, but I'll try to do everything to avoid that in the release.
I just have to understand what's going on...

cu,
~  Lars
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