[pulseaudio-discuss] Cannot start Pulse Audio when using ALSA plug-in as sound source

[Krzysztof Cieniawski]

Maybe I will try to describe problem one more time to get everything
together.
1. I am developing ALSA plugin based on external IO plug-in SDK.
2. Plug-in work with ALSA but when I try to start it Pulse Audio with pcm
using this plug I get error:

I: [pulseaudio] (alsa-lib)dlmisc.c: Cannot open shared library
/usr/lib/aarch64-linux-gnu/alsa-lib/libasound_module_pcm_iopdm.so
I: [pulseaudio] alsa-util.c: Error opening PCM device temp: No such
device or address
E: [pulseaudio] module.c: Failed to load module "module-alsa-source"
(argument: "device=temp"): initialization failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Failed to initialize daemon.

3. As Russel Treleaven suggested I added `hint` field in
`/usr/share/alsa/alsa.conf.d/iopdm.conf` file where I have configuration of
my plug-in and when I list pcm's with hints it shows up.
4. Command `pasuspender -- speaker-test --nloops=1 --test=wav --channels=2
--device=temp` is not working because there is no Pulse Audio daemon
working. It is because on Pulse Audio startup I get error from point 2.
5. Command ` speaker-test --nloops=1 --test=wav --channels=2 --device=temp`
works as expected.
6. I would like to use Pulse Audio on top of my ALSA device because I am
using Amazon Alexa which use Pulse Audio.

I am looking forward for any help!

Regards,

Krzysztof Cieniawski

pt., 9 sie 2019 o 16:51 Krzysztof Cieniawski <kcieniawski at gmail.com>
napisał(a):

> Yes it was hardware problem now `speaker-test` works as expected.
>
> pt., 9 sie 2019 o 16:48 Krzysztof Cieniawski <kcieniawski at gmail.com>
> napisał(a):
>
>> Calling `pasuspender -- speaker-test --nloops=1 --test=wav --channels=2
>> --device=temp`  cause error:
>> `Connection failure: Connection refused
>> pa_context_connect() failed: Invalid argument`
>> With command  `speaker-test --nloops=1 --test=wav --channels=2
>> --device=temp` no sound is given to headphones just quiet white noise but
>> it may be hardware fault (cable). Command work without errors.
>>
>> pt., 9 sie 2019 o 16:26 Russell Treleaven <rtreleaven at bunnykick.ca>
>> napisał(a):
>>
>>> Ok cool.
>>> One more sanity test.
>>> `pasuspender -- speaker-test --nloops=1 --test=wav --channels=2
>>> --device=temp`
>>> Works as expected?
>>>
>>>
>>> On Fri, Aug 9, 2019 at 10:23 AM Krzysztof Cieniawski <
>>> kcieniawski at gmail.com> wrote:
>>>
>>>> I have added `hint` field in `/usr/share/alsa/alsa.conf.d/iopdm.conf`
>>>> file where I have configuration of my plug-in and when I list pcm's with
>>>> hints it shows up.
>>>>
>>>>
>>>> pt., 9 sie 2019 o 15:56 Russell Treleaven <rtreleaven at bunnykick.ca>
>>>> napisał(a):
>>>>
>>>>> `aplay -L` lists pcm's with hints.
>>>>> If you add a hint to your pcm does it show up in the output of `aplay
>>>>> -L` ?
>>>>>
>>>>> On Fri, Aug 9, 2019 at 9:32 AM Krzysztof Cieniawski <
>>>>> kcieniawski at gmail.com> wrote:
>>>>>
>>>>>> Hello!
>>>>>>
>>>>>> I am developing ALSA plug-in based on ALSA PCM External Plugin SDK.
>>>>>> Plug-in is source plug and has to convert PDM signal from microphone input
>>>>>> to PCM used by Linux. I have succeeded to compile it using cmake and I have
>>>>>> copied it to ALSA lib directory. I have updated *.asoundrc* file and
>>>>>> make right PCM connection. I am able to record sound using this plug-in
>>>>>> with *arecord* command. Unfortunatelly when I start *PulseAudio*
>>>>>> server I got error message:
>>>>>>
>>>>>> I: [pulseaudio] (alsa-lib)dlmisc.c: Cannot open shared library /usr/lib/aarch64-linux-gnu/alsa-lib/libasound_module_pcm_iopdm.so
>>>>>> I: [pulseaudio] alsa-util.c: Error opening PCM device temp: No such device or address
>>>>>> E: [pulseaudio] module.c: Failed to load module "module-alsa-source" (argument: "device=temp"): initialization failed.
>>>>>> E: [pulseaudio] main.c: Module load failed.
>>>>>> E: [pulseaudio] main.c: Failed to initialize daemon.
>>>>>>
>>>>>> I would like to use PulseAudio on top of my device because I am using
>>>>>> Amazon Alexa which use PulseAudio. How to get things right? Where is the
>>>>>> problem? If there is other solution available I would be grateful for it to.
>>>>>> On the path given in this error message there is this plug-in.
>>>>>>
>>>>>> I would be very grateful for any help!
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Krzysztof Cieniawski
>>>>>> _______________________________________________
>>>>>> pulseaudio-discuss mailing list
>>>>>> pulseaudio-discuss at lists.freedesktop.org
>>>>>> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Sincerely,
>>>>>
>>>>> Russell Treleaven
>>>>> sip:rtreleaven at sip.bunnykick.ca;transport=tcp
>>>>>
>>>>> _______________________________________________
>>>>> pulseaudio-discuss mailing list
>>>>> pulseaudio-discuss at lists.freedesktop.org
>>>>> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>>
>>>> _______________________________________________
>>>> pulseaudio-discuss mailing list
>>>> pulseaudio-discuss at lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>
>>>
>>>
>>> --
>>> Sincerely,
>>>
>>> Russell Treleaven
>>> sip:rtreleaven at sip.bunnykick.ca;transport=tcp
>>>
>>> _______________________________________________
>>> pulseaudio-discuss mailing list
>>> pulseaudio-discuss at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>
>>
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