[alsa-devel] Running PJSIP for voip calls in alsa

[maruthi srinivas]

Considering playback,

period_size  :  your sound card will generate interrupt after period_size
bytes have been consumed and ALSA core is informed of this, in driver's
interrupt handler.
Periods :    Number of buffer slices , each having period_size bytes.
Buffer_size :  periods * period_size

Your application should query the driver for the parameters and set
accordingly. Below is one good example for writing a alsa application :

http://equalarea.com/paul/alsa-audio.html

Regards,
Maruthi

On Tue, Jul 28, 2015 at 10:38 AM, Srinivasan S <srinivasan.s at tataelxsi.co.in
> wrote:

> Dear Clemens,
>
> Could you please helpme out in this
>
> I am trying to understand few terminologies w.r.t the following for
> developing alsa application
>
> Period_size
> Periods
> period_time
> Buffer_time
> Buffer_size
>
>
>
> ________________________________________
> From: alsa-devel-bounces at alsa-project.org <
> alsa-devel-bounces at alsa-project.org> on behalf of Srinivasan S <
> srinivasan.s at tataelxsi.co.in>
> Sent: Monday, July 20, 2015 12:18 PM
> To: Clemens Ladisch
> Cc: alsa-devel at alsa-project.org
> Subject: Re: [alsa-devel] Running PJSIP for voip calls in alsa
>
> Dear Clemens,
>
> Could you pls let me know, do you know any alsa linux utilities/tools
> similar to aplay arecord to determine this clock drift issue in driver
>
> Kindly do the needful,
>
> Many Thanks in advance
> ________________________________________
> From: Srinivasan S
> Sent: Thursday, July 16, 2015 10:09 AM
> To: Clemens Ladisch
> Cc: alsa-devel at alsa-project.org
> Subject: Re: [alsa-devel] Running PJSIP for voip calls in alsa
>
> Dear Clemens,
>
> Thanks a lot for your replies,
>
> Could you pls let me know, do you know any alsa linux utilities/tools
> similar to aplay arecord to determine this clock drift issue in driver
>
> Kindly do the needful,
>
> Many Thanks in advance
>
> ________________________________________
> From: Clemens Ladisch <clemens at ladisch.de>
> Sent: Monday, July 13, 2015 1:28 PM
> To: Srinivasan S
> Cc: alsa-devel at alsa-project.org
> Subject: Re: [alsa-devel] Running PJSIP for voip calls in alsa
>
> Srinivasan S wrote:
> > Could you please provide any suggestions or inputs from where this
> problem could arrive ie., in either platform driver or machine driver or
> codec driver??
>
> I do not know that driver.
>
>
> Regards,
> Clemens
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