[alsa-devel] ALSA Mixer issue

[sudarshan bisht]

Hi Jaroslav ,

                      It works fine in my Linux PC but when I try to run
same on my target device , it gets into infinite loop and never comes out of
poll function.
Any suggestion to make it work on target device ?

On Tue, Aug 3, 2010 at 10:35 AM, sudarshan bisht
<bisht.sudarshan at gmail.com>wrote:

> Thanks Jaroslav ,
>
> It works for me !!!
>
>
>
> On Fri, Jul 30, 2010 at 5:36 PM, sudarshan bisht <
> bisht.sudarshan at gmail.com> wrote:
>
>> Thanks for the reply , I will try the same soon .
>>
>> On Fri, Jul 30, 2010 at 7:00 PM, Jaroslav Kysela <perex at perex.cz> wrote:
>>
>>>  On Fri, 30 Jul 2010, sudarshan bisht wrote:
>>>
>>> Hi ,
>>>>
>>>> I wanted to know that can we use multiple handlers for the same ALSA
>>>> mixer ?
>>>>
>>>> My use case is something like this .
>>>>
>>>> I have two modules and having two different handlers for ALSA mixer.
>>>>  First
>>>> module does some volume change , and I try to read the latest volume
>>>> using
>>>> my second handler ( of first second module) .
>>>>
>>>> But I am not getting the most recent value in second handler ( the
>>>> volume
>>>> set by the first module )  so I feel there is some inconsistency when I
>>>> use
>>>> two handlers from two different modules in order to fetch volume
>>>> information
>>>> from the ALSA mixer.
>>>>
>>>
>>> You must sync the cached information using poll() or select() on file
>>> descriptors returned by snd_mixer_poll_descriptors_*() functions and call
>>> snd_mixer_handle_events() if any events are waiting.
>>>
>>>                                        Jaroslav
>>>
>>> -----
>>> Jaroslav Kysela <perex at perex.cz>
>>> Linux Kernel Sound Maintainer
>>> ALSA Project, Red Hat, Inc.
>>>
>>>
>>
>>
>> --
>> Regards,
>>
>> Sudarshan Bisht
>>
>
>
>
> --
> Regards,
>
> Sudarshan Bisht
>



-- 
Regards,

Sudarshan Bisht