[pulseaudio-discuss] [PATCH] bluetooth: Add support for automatic switch between hsp and a2dp profiles

[Pali Rohár]

On Friday 26 September 2014 06:55:38 Arun Raghavan wrote:
> On 26 September 2014 03:06, Pali Rohár <pali.rohar at gmail.com> 
wrote:
> > On Wednesday 24 September 2014 19:08:55 Pali Rohár wrote:
> >> With this patch module-bluetooth-policy automatically
> >> switch from a2dp profile to hsp profile if some
> >> application want to start recording.
> >> 
> >> By default a2dp profile is used for listening music, but
> >> for VOIP calls is needed profile with microphone support
> >> (hsp). So this patch will switch to hsp profile if some
> >> application want to use microphone and after it release it
> >> profile is switched back to a2dp. So this patch allows to
> >> use bluetooth microphone automatically without need of
> >> user interaction.
> >> 
> >> Signed-off-by: Pali Rohár <pali.rohar at gmail.com>
> >> ---
> > 
> > And with this patch a2dp profile could be preferred and has
> > higher priority then hsp. Because a2dp has better audio
> > quality and when recording is needed my patch for
> > module-bluetooth-policy will switch to hsp. What do you
> > think about it?
> 
> I'm not in favour of an exception-list-based approach (too
> much of a moving target). I'd written something similar in
> the past based on the media role. I'd prefer something like
> this since it allows us to take action based on what the
> stream is meant to be doing, rather than having a blanket
> policy that may or may not make sense.
> 
> http://cgit.freedesktop.org/~arun/pulseaudio/tree/src/modules/
> module-profile-switcher.c?h=bluetooth
> 
> The intention when we last discussed on the list wast to
> integrate this into module-bluetooth-policy (the patch
> predates merge of m-b-p).
> 
> -- Arun

This approach depends on that output stream set by application 
will have correct PA_PROP_MEDIA_ROLE. So basically will not work 
with any existing application. So this is useless for me and for 
other people too.

-- 
Pali Rohár
pali.rohar at gmail.com
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