[pulseaudio-discuss] I want to know about how to communication one module with another module

[Flavio Ceolin]

Zhen Fu <fuzh at marvell.com> writes:

Hi guys,

> Hi rong,
>
> It is very useful message for me. I am doing a audio server, so I refer the pulseaudio system.
>
> --
> Best Regards,
> Zhen Fu
>
> -----Original Message-----
> From: rong deng [mailto:dzrongg at gmail.com] 
> Sent: Wednesday, July 25, 2012 11:21 PM
> To: General PulseAudio Discussion
> Cc: Zhen Fu
> Subject: Re: [pulseaudio-discuss] I want to know about how to communication one module with another module
>
> Hi Zhen,
>
> 2012/7/24 Zhen Fu <fuzh at marvell.com>:
>> Hi all developer,
>>
>>
>>
>> I want to know about how to communication one module with another module. Is
>> it use asyncmg? Thank you!
>
> I'm not the expert here, but here's my two cents. :)
>
> In theory, two modules should not communicate directly with each
> other. For a module, the only thing it should care about is the core,
> and it should communicate with the core, handling the messages from
> the core etc. As you might know already, pulseaudio takes the thread
> model, for most of the modules, they would reside in a separate
> thread, e.g. ALSA. Communicating directly with two methods could be a
> mess, and even worse, one module is totally unaware when the another
> module is loaded or not.
>
> So the current way, in my humble opinion, is to use the core as a
> bridge to direct the communication between two modules.
>
> That said, the intrinsic question is why you should do this at your
> first place? :) Maybe there's a chance to skip this ugliness in your
> design.
>
> Thanks!
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss

Taking the opportunity, how pa handle two different conflicting modules
? For example, module-role-cork can be used to cork others streams when
a stream with the expected role appears, what happens if we've another
module that increases the volume when a stream with the same role appears
?

Is it responsability of pa or of the user ?

Regards,
Flavio Ceolin