[pulseaudio-discuss] module-role-cork and mp3s

Georg Chini georg at chini.tk
Thu Aug 13 16:14:53 PDT 2015

On 13.08.2015 23:29, Mikhail Morfikov wrote:
> Hash: SHA512
> On 2015-08-13 18:49, Georg Chini wrote:
>> On 13.08.2015 14:58, Tanu Kaskinen wrote:
>>> On Thu, 2015-08-13 at 10:50 +0200, Mikhail Morfikov wrote:
>>>> I have two streams one phone and one video/audio, and when I set the
>>>> following:
>>>> load-module module-role-ducking trigger_roles=phone
>>>> ducking_roles=music,video volume=60%
>>>> and I start playing an mp3, the volume is lowered to 60% and that's
>>>> fine. Each time a new mp3 is being played the volume doesn't change,
>>>> which is also a good thing.
>>>> There's another module module-role-cork and when it's enabled (also
>>>> commenting out the line above), it acts a little bit strange. When I
>>>> start the phone stream, the mp3 is muted, and that's expected, but
>>>> when
>>>> another mp3 starts to play, the sound appears.
>>>> Should that happen?
>>> Ideally that shouldn't happen, but currently we have a bit limited
>>> support for managing corking. Currently applications are required to
>>> cooperate when we want to cork them. module-role-cork sends a cork
>>> request to an application, and the application will then obey that
>>> request (or not, but in your case not obeying the request is not the
>>> problem). To make this work on new streams too, module-role-cork should
>>> send the cork request also when a new stream appears, which it
>>> currently doesn't do. It could very well do that, so patches welcome!
>>> Sending a cork request after a new stream has appeared isn't quite
>>> optimal, since the beginning of the stream may already hit the speakers
>>> before the corking happens, but that would still be better than the
>>> current behaviour.
>>> It would be good to have "server-side corking" that wouldn't require
>>> cooperation from applications. That's a bit more complicated to
>>> implement.
>> Hi,
>> you could try if my patches
>> http://thread.gmane.org/gmane.comp.audio.pulseaudio.general/23189
>> solve the problem because the patches combine module-role-cork
>> and module-role-ducking (and I believe they should mute/cork a stream
>> when it appears).
>> Regards
>>              Georg
>> _______________________________________________
>> pulseaudio-discuss mailing list
>> pulseaudio-discuss at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
> I've tested the patches, but nothing has changed.
That's strange because with the patches both modules share the
same code. So I would have expected that they behave equally.
Can you check if there is any difference between the two cases by
running pulseaudio with debugging? There should be a line in the
log each time the module interacts with a stream.


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