Running PJSIP for voip calls in alsa

Running PJSIP for voip calls in alsa

[Srinivasan S]

Dear Clemens,


Could you please let me know whether the below issue is in PJSIP or alsa or driver or in the ti sdk8 BSP's (rootfs)

1. We are running PJSIP for establishing VOIP calls on ti sdk 8 BSP's (linux kernel 3.14), we are seeing the below error messages in the PJSIP, Could you please let me know what could be issue ?

08:32:42.082 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.083 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.086 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.088 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.088 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.091 Master/sound Underflow, buf_cnt=0, will generate 1 frame
08:32:42.112 Master/sound Underflow, buf_cnt=0, will generate 1 frame

In failure call pjsip reports Master/sound Underflow continuously, At this point the control stays at pjsip and application will wait for it and all functionality in idle state at application and after this, no other feature will work until restart the application.

The above problem observed with new rootfs (ti sdk 8) but when we tried with old rootfs (ti sdk 7) we are able to make calls with no problem. Few calls are long duration calls(33 and 55 minutes).

With ti sdk 8 kernel, I tried replacing even the alsa libraries from ti sdk 7 rootfs to ti sdk 8 rootfs, but still the issue persists,

/usr/lib/libasound.la

/usr/lib/libasound.so

/usr/lib/alsa-lib/smixer/smixer-ac97.la

/usr/lib/alsa-lib/smixer/smixer-ac97.so

/usr/lib/alsa-lib/smixer/smixer-hda.la

/usr/lib/alsa-lib/smixer/smixer-hda.so

/usr/lib/alsa-lib/smixer/smixer-sbase.la

/usr/lib/alsa-lib/smixer/smixer-sbase.so

Firstly could you please let me know why this issue is seen in ti sdk 8 BSP's (ie., in rootfs), & what could be the problem in ti sdk 8 rootfs ??
Apart from the above is there any other ALSA related configuration files, needs to copied from the ti sdk 7 rootfs to ti sdk 8 rootfs, inorder to resolve this issue

If possible, could you please validate this PJSIP version 2.3 on ti sdk 8 BSP's on your EVK kit & let me know whether this issue is reproducible

Awaiting for your replies,
Many Thanks in advance

Re: Running PJSIP for voip calls in alsa

[Clemens Ladisch]

Srinivasan S wrote:
> we are seeing the below error messages in the PJSIP, Could you please let me know what could be issue ?

I don't know PJSIP.

> The above problem observed with new rootfs (ti sdk 8) but when we tried with old rootfs (ti sdk 7) we are able to make calls with no problem.

Apparently, the driver changed its behaviour in the new kernel.

> If possible, could you please validate this PJSIP version 2.3 on ti sdk 8 BSP's on your EVK kit

I don't have any such TI SDK.


Regards,
Clemens

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

Dear Clemens,

Many Thanks a lot for your suggestions till so far

I suspect it might be the clock drift issue again, could you please let me know whether my suspection is correct or wrong??

Because this issue might be, in one of my earlier reported threads for establishing the  GSM (ie., sound card & GSM streams were not synchronized)  

Could you please let me is there any chances of getting resolved in sound card driver (my understanding of sound card driver is codec driver, pls let me know whether my understanding is correct or not ) or alsa??

Could you please provide any inputs on this

Kindly do the needful as early as possible

Many Thanks in advance,


________________________________________
From: Clemens Ladisch <clemens@ladisch.de>
Sent: Friday, July 10, 2015 7:09 PM
To: Srinivasan S
Cc: alsa-devel@alsa-project.org
Subject: Re: Running PJSIP for voip calls in alsa

Srinivasan S wrote:
> we are seeing the below error messages in the PJSIP, Could you please let me know what could be issue ?

I don't know PJSIP.

> The above problem observed with new rootfs (ti sdk 8) but when we tried with old rootfs (ti sdk 7) we are able to make calls with no problem.

Apparently, the driver changed its behaviour in the new kernel.

> If possible, could you please validate this PJSIP version 2.3 on ti sdk 8 BSP's on your EVK kit

I don't have any such TI SDK.


Regards,
Clemens

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

Dear Clemens,

As I suspected, am seeing the Clock drifts in ti sdk 8 (linux kernel 3.14) but I dont see this in ti sdk 7 (linux kernel 3.12), Could you please help me out, is there any possibilities of this getting resolved in Kernel or alsa???? 

Audio Device Test
Here are the audio statistics:
Rec : interval (min/max/avg/dev)=
         0/41/20/13 (ms)
      max burst=3
Play: interval (min/max/avg/dev)=
         19/22/20/0 (ms)
      burst=2
There could be 1 problem(s) with the sound device:
 1: Clock drifts detected. Capture is 16 samples/sec faster than the playback device

1:OK


Kindly do the needful as early as possible

Awaiting for your replies

Many Thanks in advance again for all your support w.r.t all of my threads

________________________________________
From: Srinivasan S
Sent: Sunday, July 12, 2015 12:24 PM
To: Clemens Ladisch
Cc: alsa-devel@alsa-project.org
Subject: Re: Running PJSIP for voip calls in alsa

Dear Clemens,

Many Thanks a lot for your suggestions till so far

I suspect it might be the clock drift issue again, could you please let me know whether my suspection is correct or wrong??

Because this issue might be, in one of my earlier reported threads for establishing the  GSM (ie., sound card & GSM streams were not synchronized)

Could you please let me is there any chances of getting resolved in sound card driver (my understanding of sound card driver is codec driver, pls let me know whether my understanding is correct or not ) or alsa??

Could you please provide any inputs on this

Kindly do the needful as early as possible

Many Thanks in advance,


________________________________________
From: Clemens Ladisch <clemens@ladisch.de>
Sent: Friday, July 10, 2015 7:09 PM
To: Srinivasan S
Cc: alsa-devel@alsa-project.org
Subject: Re: Running PJSIP for voip calls in alsa

Srinivasan S wrote:
> we are seeing the below error messages in the PJSIP, Could you please let me know what could be issue ?

I don't know PJSIP.

> The above problem observed with new rootfs (ti sdk 8) but when we tried with old rootfs (ti sdk 7) we are able to make calls with no problem.

Apparently, the driver changed its behaviour in the new kernel.

> If possible, could you please validate this PJSIP version 2.3 on ti sdk 8 BSP's on your EVK kit

I don't have any such TI SDK.


Regards,
Clemens

Re: Running PJSIP for voip calls in alsa

[Clemens Ladisch]

Srinivasan S wrote:
> I suspect it might be the clock drift issue again, could you please let me know whether my suspection is correct or wrong??
>
> Because this issue might be, in one of my earlier reported threads for establishing the  GSM (ie., sound card & GSM streams were not synchronized)
>
> Could you please let me is there any chances of getting resolved in sound card driver or alsa??

If the new kernel behaves differently, then apparently the driver changes.
But you'd have to ask the author of the driver.

In any case, the sound card cannot know how fast data arrives over GSM.


Regards,
Clemens

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

Thanks a lot Clemens for your quick responses

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??


Kindly do the needful as early as possible

Many Thanks in advance Clemens,

________________________________________
From: Clemens Ladisch <clemens@ladisch.de>
Sent: Monday, July 13, 2015 12:36 PM
To: Srinivasan S
Cc: alsa-devel@alsa-project.org
Subject: Re: Running PJSIP for voip calls in alsa

Srinivasan S wrote:
> I suspect it might be the clock drift issue again, could you please let me know whether my suspection is correct or wrong??
>
> Because this issue might be, in one of my earlier reported threads for establishing the  GSM (ie., sound card & GSM streams were not synchronized)
>
> Could you please let me is there any chances of getting resolved in sound card driver or alsa??

If the new kernel behaves differently, then apparently the driver changes.
But you'd have to ask the author of the driver.

In any case, the sound card cannot know how fast data arrives over GSM.


Regards,
Clemens

Re: Running PJSIP for voip calls in alsa

[Clemens Ladisch]

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

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

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@ladisch.de>
Sent: Monday, July 13, 2015 1:28 PM
To: Srinivasan S
Cc: alsa-devel@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

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

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@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@ladisch.de>
Sent: Monday, July 13, 2015 1:28 PM
To: Srinivasan S
Cc: alsa-devel@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

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

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@alsa-project.org <alsa-devel-bounces@alsa-project.org> on behalf of Srinivasan S <srinivasan.s@tataelxsi.co.in>
Sent: Monday, July 20, 2015 12:18 PM
To: Clemens Ladisch
Cc: alsa-devel@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@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@ladisch.de>
Sent: Monday, July 13, 2015 1:28 PM
To: Srinivasan S
Cc: alsa-devel@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
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

Re: 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@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@alsa-project.org <
> alsa-devel-bounces@alsa-project.org> on behalf of Srinivasan S <
> srinivasan.s@tataelxsi.co.in>
> Sent: Monday, July 20, 2015 12:18 PM
> To: Clemens Ladisch
> Cc: alsa-devel@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@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@ladisch.de>
> Sent: Monday, July 13, 2015 1:28 PM
> To: Srinivasan S
> Cc: alsa-devel@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
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>

Re: Running PJSIP for voip calls in alsa

[Srinivasan S]

Dear Maruthi,


Thanks a lot for the info


1. Is it same for Record also???


2. Could you please help me out in calculating for 8khz 16 bit stereo & 8khz 16 bit mono. (for playback & record)


3. Is that ALSA would interrupt for the data, every one second ie., 2*8000 = 16000 bytes per second

or is that the driver interrupt handler, at what rate the data is transfered to the ALSA???


Sorry for my poor understanding

Could you please help me out in this

Kindly do the needful as early as possible

Many Thanks in advance

Srinivasan S

________________________________
From: maruthi srinivas <maruthi.srinivas.b@gmail.com>
Sent: Tuesday, July 28, 2015 12:22 PM
To: Srinivasan S
Cc: Clemens Ladisch; alsa-devel@alsa-project.org
Subject: Re: [alsa-devel] Running PJSIP for voip calls in alsa

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@tataelxsi.co.in<mailto:srinivasan.s@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@alsa-project.org<mailto:alsa-devel-bounces@alsa-project.org> <alsa-devel-bounces@alsa-project.org<mailto:alsa-devel-bounces@alsa-project.org>> on behalf of Srinivasan S <srinivasan.s@tataelxsi.co.in<mailto:srinivasan.s@tataelxsi.co.in>>
Sent: Monday, July 20, 2015 12:18 PM
To: Clemens Ladisch
Cc: alsa-devel@alsa-project.org<mailto:alsa-devel@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@alsa-project.org<mailto:alsa-devel@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@ladisch.de<mailto:clemens@ladisch.de>>
Sent: Monday, July 13, 2015 1:28 PM
To: Srinivasan S
Cc: alsa-devel@alsa-project.org<mailto:alsa-devel@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
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org<mailto:Alsa-devel@alsa-project.org>
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org<mailto:Alsa-devel@alsa-project.org>
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel