[pulseaudio-discuss] [RESEND] [PATCH v3 1/2] bluetooth: Add support for automatic switch between hsp and a2dp profiles

[Pali Rohár]

On Tuesday 02 February 2016 10:33:22 Arun Raghavan wrote:
> On 2 February 2016 at 14:39, Pali Rohár <pali.rohar at gmail.com> wrote:
> > On Tuesday 02 February 2016 14:24:07 Arun Raghavan wrote:
> >> > > > @@ -35,16 +35,18 @@
> >> > > > 
> >> > > >  #include "module-bluetooth-policy-symdef.h"
> >> > > > 
> >> > > > -PA_MODULE_AUTHOR("Frédéric Dalleau");
> >> > > > -PA_MODULE_DESCRIPTION("When a bluetooth sink or source is
> >> > > > added, load module-loopback");
> >> > > > +PA_MODULE_AUTHOR("Frédéric Dalleau, Pali Rohár");
> >> > > > +PA_MODULE_DESCRIPTION("Automatically switch between
> >> > > > bluetooth hsp
> >> > > > and a2dp profiles and automatically load module-loopback
> >> > > > when a bluetooth sink (ag) or source (ag, a2dp_source) is
> >> > > > added");
> >> > > 
> >> > > I'd just rewrite this to be "Policy module to make using
> >> > > bluetooth devices out-of-the-box easier".
> >> > 
> >> > Personally I'm fine with both descriptions so its up to other
> >> > pulseaudio
> >> > reviewers/maintainers.
> >> 
> >> I prefer the shorter name in the description, so let's go with
> >> that.
> > 
> > Ok.
> > 
> >> > > >  PA_MODULE_VERSION(PACKAGE_VERSION);
> >> > > >  PA_MODULE_LOAD_ONCE(true);
> >> > > >  PA_MODULE_USAGE(
> >> > > > 
> >> > > > +        "switch=<Switch between hsp and a2dp profile?> "
> >> > > 
> >> > > Maybe call this "autoswitch".
> >> > 
> >> > "autoswitch" or "auto_switch"?
> >> 
> >> I'm not a huge fan of the underscores in our modarg names, but I'm
> >> fine with either.
> > 
> > Ok.
> > 
> >> > > > +    /* Flag this card for revert */
> >> > > > +    pa_proplist_sets(new_data->proplist, "bluez-revert",
> >> > > > "true");
> >> > > > +    return PA_HOOK_OK;
> >> > > 
> >> > > What is the reasoning behind having this property?
> >> > 
> >> > For each card I need to know if card needs to be "reverted" in
> >> > future.
> >> 
> >> Is this for a case where a device is manually kept in the hsp
> >> profile and you don't want to touch that?
> > 
> > Yes. When user chose manually to use hsp profile.
> > 
> >> > > In general, I prefer the module doing its book-keeping locally
> >> > > rather
> >> > > than (ab)using the proplist for state.
> >> > 
> >> > Ok, what to use then? How to store for each private boolean flag
> >> > needed
> >> > just by this module?
> >> 
> >> Usually you'd do something like have a hashmap in the module's
> >> userdata, and then you could add your pa_card to that hashmap if
> >> it needs a revert (and remove when you're done with the revert).
> >> The userdata is available in all the hook callbacks.
> > 
> > But then I need to deal with removing card (e.g. somebody unplug
> > usb bluetooth adapter when voice call via hsp profile is
> > active)... And maybe other scenarios?
> 
> Yes. You just need to use PA_CORE_HOOK_CARD_UNLINK.
> 
> -- Arun

I sent new version v4 of this patch which address above problems.

-- 
Pali Rohár
pali.rohar at gmail.com
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