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

Sat Aug 15 07:46:51 PDT 2015

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On 2015-08-15 14:36, Georg Chini wrote:
> On 14.08.2015 11:46, Georg Chini wrote:
>> On 14.08.2015 10:51, Mikhail Morfikov wrote:
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>>> On 2015-08-14 10:18, Georg Chini wrote:
>>>> On 14.08.2015 09:33, Mikhail Morfikov wrote:
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>>>>> On 2015-08-14 01:14, Georg Chini wrote:
>>>>>> On 13.08.2015 23:29, Mikhail Morfikov wrote:
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>>>>>>> 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.
>>>>>>
>>>>>> Georg
>>>>>>
>>>>>> _______________________________________________
>>>>>> pulseaudio-discuss mailing list
>>>>>> pulseaudio-discuss at lists.freedesktop.org
>>>>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>>> I've compared the debug logs in both cases (with and without patches)
>>>>> and checked whether they're different in any point. There are 3
>>>>> occurrences of stream-interaction.c in the log with patches:
>>>>>
>>>>> D: [pulseaudio] stream-interaction.c: Using role 'phone' as trigger role.
>>>>> D: [pulseaudio] stream-interaction.c: Using roles 'music' and 'video' as cork roles.
>>>>> ...
>>>>> D: [pulseaudio] stream-interaction.c: Found a 'phone' stream that corks/mutes a 'video' stream.
>>>>>
>>>>> And there's also:
>>>>>
>>>>> D: [pulseaudio] sink-input.c: The mute of sink input 0 changed from no to yes.
>>>>>
>>>>> And that's it. I can provide you with the full logs if you needed them.
>>>>>
>>>> I was rather thinking about a comparison between module-role-cork
>>>> and module-role-ducking with the patches because they behave differently
>>>> even though the code is exactly the same. I would expect, that when you
>>>> compare the log messages there should be no difference except that it
>>>> says "cork" for one module and "duck" for the other.
>>>>
>>>> One reason I can think of why there is a problem with role-cork but not with
>>>> role-ducking is that the new stream might still be corked when the sink_input
>>>> is put. So role-cork sees the stream as corked and does nothing but the
>>>> application uncorks the stream at a later time.
>>>>
>>>> Regards
>>>>               Georg
>>>> _______________________________________________
>>>> pulseaudio-discuss mailing list
>>>> pulseaudio-discuss at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>> I hadn't tested module-role-ducking with patches before, but it looks like that
>>> both modules act in the same way with patches. I mean, when I use:
>>>
>>> load-module module-role-ducking trigger_roles=phone ducking_roles=music,video volume=60%
>>>
>>> it lowers the volume to 60% when TS3 starts to capture, but when another mp3
>>> is being played, the volume backs to 100%. Something like "unmute" in the case
>>> of module-role-cork .
>> Thanks for letting me know. I will look into this and hope to send another
>> series of patches some time this weekend.
>>
> Hi Mikhail,
> 
> the problem was exactly what I described above. I just posted a patch on top
> of my previous series. See also comments in the patch. Could you please test?
> Expected result would be that module-role-ducking acts correctly while with
> module-role-cork a new stream is only muted.
> I could cork a stream when it changes its state to uncork, but this would mean
> that you can no longer uncork a stream manually if it was corked by module-role-cork.
> 
> @Tanu: Is there something like a "cork counter" in PA which keeps track of
> multiple corks for the same stream and only releases the cork if the counter
> goes to zero? If not should something like that be added?
> 
> Regards
>              Georg
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
I've tested the new patch and both modules work in the way I wanted. I mean,
when set:

load-module module-role-cork

the amarok is muted when TS3 starts to capture and when amarok plays another
mp3, it's still muted.

And the same with:

load-module module-role-ducking trigger_roles=phone ducking_roles=music,video volume=60%

where the volume is lowered to 60% and stays at this level till TS3 stops
capturing.

I have one question concerning the manually unmuted applications. I'm able
to unmute amarok, and it plays mp3 till its end, but the next mp3 will be muted.
Is there a way to fix this so the apps that are manually unmuted would stay
in that way? At least to the moment when you mute them again, also manually.