On 2014-09-25 14:08, Pali Rohár wrote:
On Thursday 25 September 2014 13:27:04 David Henningsson wrote:
On 2014-09-25 02:25, Pali Rohár wrote:
With this patch it is possible to configure different volume
settings for a2dp and hsp profiles. It is usefull for
bluetooth headsets which do not have normalized a2dp and
hsp volume levels.
Module module-device-restore uses port name as identifier,
so if different profiles have different names
module-device-restore can store volume settings for each
profile.
Hi Pali and thanks for the patch,
I understand the problem here, but this is the wrong way to
fix it.
First, ports is what unity- and gnome-control-center thinks
are most closely to physical devices. If you have two
different ports, they will appear like two different devices.
Bluetooth A2DP and HSP are different streams, so they are
basically different devices.
From a technical perspective, maybe. But from a user perspective, how
many headsets do you hold in your hand? It's not one A2DP headset and
another HSP headset - it is one headset, so it's one device.
We've been through that discussion before. [1]
They are using different codec and
have different quality. So I think that "port" name for these
bluetooth transport should be different.
In future I'm planning to add support for bidirectional a2dp
streaming support (with two bluetooth transports) so here I need
two ports for it. I did not see any bluetooth headset with a2dp
microphone, but on linux bluez systems it is possible and it is
*only* one way how to get high quality sink+source streaming
between two machine (via bluetooth).
And some another rare headsets support using both a2dp and hsp
transports at same time. Pulseaudio does not support this
configuration too, but maybe in future (if I have one) I will
want to see support in PA too. And for this configuration is more
ports support needed.
In above both bluetooth possible configurations are bluetooth
transports in use and thus should be visible as *different* sound
sink/sources (as this is for sending different streams via
bluetooth). So I think that using more ports (with different)
names is good idea and if gnome-control-center shows different
ports as different cards, I think this is correct.
As for your potential future scenarios, let's try to deal with them when
they materialize.
For very rare scenarios, I'm less worried about having one device look
like it's two, if that's the last resort. But I definitely don't want it
for every bluetooth headset out there.
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
[1]
http://lists.freedesktop.org/archives/pulseaudio-discuss/2012-November/015462.html
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