On Mon, 2014-09-15 at 12:27 +0200, Wim Taymans wrote:

> There is the future possibility to handle a button press and
> volume/gain of the device. I'm not sure we want to handle any of them.
> You could map the button press to cork/uncork the stream. You could
> possibly use the volume controls in addition to the software volume
> but there are only 15 volume levels. HSP only operates on 8Khz mono
> 16bits samples so  perhaps it is not worth it.

With BlueZ 4 we support hardware volume, i.e. the 15 volume levels. This
is actually quite important, because if you rely on software volume,
there will be two independent volume controls for the headset: the
software volume in PulseAudio, and the headset's internal volume. Not
user-friendly at all.

This is not to say that you must implement this feature. I think the
oFono backend doesn't implement this either.

-- 
Tanu


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