Example "Simple PJSUA" without soundcard
Hello,
We we're now looking into the pjsip stack and we want to run something like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard initialisation
at all (so we don't see where the SIP audio is connected to the audio card.
We found examples regarding the PJMEDIA stack, but we don't see have to use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
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B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard initialisation
at all (so we don't see where the SIP audio is connected to the audio card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have to use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
Hello Benny,
Thanks for your answer.
What we like to have is use something like "Simple PJSUA", but we don't know
how we get the audio bytes in our own software routines.
We now understand how to disable the soundcard, but the null device is
created. But we still then don't know how we interface with the speech data.
Can you send us a small piece of source code what we should create to get
the databytes into and from our own source code.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-20 19:13
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something
like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard
initialisation
at all (so we don't see where the SIP audio is connected to the audio
card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have to
use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Hi this solution from Benny worked just great for us.
Regards
Lafras
Frankly I've forgotten about pjmedia_conf_add_passive_port(). :D And I don't
have source codes handy with me now so I can't check it out.
But it's true that this function is not used by anything. So it may be true
that the implementation is broken.
More over, we now have splitcomb, which achieves the same thing in more
general manner. So if you want passive ports (actually active probably is
more correct, but anyway the term has been confusing), you can instantiate a
splitcomb, and create a reverse channel on the splitcomb, which then you can
add to the bridge using the usual pjmedia_conf_add_port(). Your thread then
can feed frames to the splitcomb.
--
Benny Prijono
http://www.pjsip.org
- original message -
Subject: [pjsip] Question regarding passive ports.
From: "Lafras Henning" lafras@xietel.com
Date: 11/09/2007 14:15
Question regarding passive ports.
I basically want to create a number of ports(10 to 20) in the conference
bridge who's audio will be fed and extracted from an external thread.
I can't to find an example of the correct use of
pjmedia_conf_add_passive_port(), so the following I have gathered from the
code.
In conference .c get_frame() comment as follows.
/* Get frame from this port.
-
For port zero (sound port) and passive ports, get the frame from
-
the rx_buffer instead. */
if (conf_port->port == NULL) {.....
So it is clear that passive functions don't have a media port, as in
create_sound_port() calls create_pasv_port with port ==NULL, this Creates
snd_buf buffers and keeps conf_port->port == NULL to work as above.
However
pjmedia_conf_add_passive_port() creates a port, then calls create_pasv_port
which does not create snd_buf buffers and keeps the port as the one created.
Function pjmedia_conf_add_passive_port() is not used anywhere and is
inconsistent with the behaviour of sound port, thus seems as though it is
not implemented correctly? Or can anyone give an example of how to use
pjmedia_conf_add_passive_port() correctly?
Many thanks and regards
Lafras
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 12:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Benny,
Thanks for your answer.
What we like to have is use something like "Simple PJSUA", but we don't
know
how we get the audio bytes in our own software routines.
We now understand how to disable the soundcard, but the null device is
created. But we still then don't know how we interface with the speech
data.
Can you send us a small piece of source code what we should create to get
the databytes into and from our own source code.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-20 19:13
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something
like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system
and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard
initialisation
at all (so we don't see where the SIP audio is connected to the audio
card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have to
use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Hello Lafras,
Thanks.
It is possible that you send me the code you used to initiate the splitcomb.
Myabe i could fin dout how to use, but it would be very much faster if i had
a reference example in source code. We're just starting tom use the PJSIP
code, so we're not quite familiar with it yet. I hope you will help.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Lafras Henning
Sent: 07-09-21 12:42
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hi this solution from Benny worked just great for us.
Regards
Lafras
Frankly I've forgotten about pjmedia_conf_add_passive_port(). :D And I don't
have source codes handy with me now so I can't check it out.
But it's true that this function is not used by anything. So it may be true
that the implementation is broken.
More over, we now have splitcomb, which achieves the same thing in more
general manner. So if you want passive ports (actually active probably is
more correct, but anyway the term has been confusing), you can instantiate a
splitcomb, and create a reverse channel on the splitcomb, which then you can
add to the bridge using the usual pjmedia_conf_add_port(). Your thread then
can feed frames to the splitcomb.
--
Benny Prijono
http://www.pjsip.org
- original message -
Subject: [pjsip] Question regarding passive ports.
From: "Lafras Henning" lafras@xietel.com
Date: 11/09/2007 14:15
Question regarding passive ports.
I basically want to create a number of ports(10 to 20) in the conference
bridge who's audio will be fed and extracted from an external thread.
I can't to find an example of the correct use of
pjmedia_conf_add_passive_port(), so the following I have gathered from the
code.
In conference .c get_frame() comment as follows.
/* Get frame from this port.
-
For port zero (sound port) and passive ports, get the frame from
-
the rx_buffer instead. */
if (conf_port->port == NULL) {.....
So it is clear that passive functions don't have a media port, as in
create_sound_port() calls create_pasv_port with port ==NULL, this Creates
snd_buf buffers and keeps conf_port->port == NULL to work as above.
However
pjmedia_conf_add_passive_port() creates a port, then calls create_pasv_port
which does not create snd_buf buffers and keeps the port as the one created.
Function pjmedia_conf_add_passive_port() is not used anywhere and is
inconsistent with the behaviour of sound port, thus seems as though it is
not implemented correctly? Or can anyone give an example of how to use
pjmedia_conf_add_passive_port() correctly?
Many thanks and regards
Lafras
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 12:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Benny,
Thanks for your answer.
What we like to have is use something like "Simple PJSUA", but we don't
know
how we get the audio bytes in our own software routines.
We now understand how to disable the soundcard, but the null device is
created. But we still then don't know how we interface with the speech
data.
Can you send us a small piece of source code what we should create to get
the databytes into and from our own source code.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-20 19:13
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something
like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system
and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard
initialisation
at all (so we don't see where the SIP audio is connected to the audio
card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have to
use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
At the moment my code is a bit of a hack, of pjsua_app.c,
I am busy seperating it into a more sane structure, will advise once it
looks ok.
regards
Lafras
----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 3:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Lafras,
Thanks.
It is possible that you send me the code you used to initiate the
splitcomb.
Myabe i could fin dout how to use, but it would be very much faster if i
had
a reference example in source code. We're just starting tom use the PJSIP
code, so we're not quite familiar with it yet. I hope you will help.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Lafras Henning
Sent: 07-09-21 12:42
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hi this solution from Benny worked just great for us.
Regards
Lafras
Frankly I've forgotten about pjmedia_conf_add_passive_port(). :D And I
don't
have source codes handy with me now so I can't check it out.
But it's true that this function is not used by anything. So it may be
true
that the implementation is broken.
More over, we now have splitcomb, which achieves the same thing in more
general manner. So if you want passive ports (actually active probably is
more correct, but anyway the term has been confusing), you can instantiate
a
splitcomb, and create a reverse channel on the splitcomb, which then you
can
add to the bridge using the usual pjmedia_conf_add_port(). Your thread
then
can feed frames to the splitcomb.
--
Benny Prijono
http://www.pjsip.org
- original message -
Subject: [pjsip] Question regarding passive ports.
From: "Lafras Henning" lafras@xietel.com
Date: 11/09/2007 14:15
Question regarding passive ports.
I basically want to create a number of ports(10 to 20) in the conference
bridge who's audio will be fed and extracted from an external thread.
I can't to find an example of the correct use of
pjmedia_conf_add_passive_port(), so the following I have gathered from the
code.
In conference .c get_frame() comment as follows.
/* Get frame from this port.
-
For port zero (sound port) and passive ports, get the frame from
-
the rx_buffer instead. */
if (conf_port->port == NULL) {.....
So it is clear that passive functions don't have a media port, as in
create_sound_port() calls create_pasv_port with port ==NULL, this Creates
snd_buf buffers and keeps conf_port->port == NULL to work as above.
However
pjmedia_conf_add_passive_port() creates a port, then calls
create_pasv_port
which does not create snd_buf buffers and keeps the port as the one
created.
Function pjmedia_conf_add_passive_port() is not used anywhere and is
inconsistent with the behaviour of sound port, thus seems as though it is
not implemented correctly? Or can anyone give an example of how to use
pjmedia_conf_add_passive_port() correctly?
Many thanks and regards
Lafras
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 12:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Benny,
Thanks for your answer.
What we like to have is use something like "Simple PJSUA", but we don't
know
how we get the audio bytes in our own software routines.
We now understand how to disable the soundcard, but the null device is
created. But we still then don't know how we interface with the speech
data.
Can you send us a small piece of source code what we should create to
get
the databytes into and from our own source code.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-20 19:13
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something
like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system
and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard
initialisation
at all (so we don't see where the SIP audio is connected to the audio
card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have
to
use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
OK thanks i will wait for your clean code.
Note: it's no problem for if you send me "hack" version already now, then i
have already something to look at.
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Lafras Henning
Sent: 07-09-21 15:22
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
At the moment my code is a bit of a hack, of pjsua_app.c,
I am busy seperating it into a more sane structure, will advise once it
looks ok.
regards
Lafras
----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 3:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Lafras,
Thanks.
It is possible that you send me the code you used to initiate the
splitcomb.
Myabe i could fin dout how to use, but it would be very much faster if i
had
a reference example in source code. We're just starting tom use the PJSIP
code, so we're not quite familiar with it yet. I hope you will help.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Lafras Henning
Sent: 07-09-21 12:42
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hi this solution from Benny worked just great for us.
Regards
Lafras
Frankly I've forgotten about pjmedia_conf_add_passive_port(). :D And I
don't
have source codes handy with me now so I can't check it out.
But it's true that this function is not used by anything. So it may be
true
that the implementation is broken.
More over, we now have splitcomb, which achieves the same thing in more
general manner. So if you want passive ports (actually active probably is
more correct, but anyway the term has been confusing), you can instantiate
a
splitcomb, and create a reverse channel on the splitcomb, which then you
can
add to the bridge using the usual pjmedia_conf_add_port(). Your thread
then
can feed frames to the splitcomb.
--
Benny Prijono
http://www.pjsip.org
- original message -
Subject: [pjsip] Question regarding passive ports.
From: "Lafras Henning" lafras@xietel.com
Date: 11/09/2007 14:15
Question regarding passive ports.
I basically want to create a number of ports(10 to 20) in the conference
bridge who's audio will be fed and extracted from an external thread.
I can't to find an example of the correct use of
pjmedia_conf_add_passive_port(), so the following I have gathered from the
code.
In conference .c get_frame() comment as follows.
/* Get frame from this port.
-
For port zero (sound port) and passive ports, get the frame from
-
the rx_buffer instead. */
if (conf_port->port == NULL) {.....
So it is clear that passive functions don't have a media port, as in
create_sound_port() calls create_pasv_port with port ==NULL, this Creates
snd_buf buffers and keeps conf_port->port == NULL to work as above.
However
pjmedia_conf_add_passive_port() creates a port, then calls
create_pasv_port
which does not create snd_buf buffers and keeps the port as the one
created.
Function pjmedia_conf_add_passive_port() is not used anywhere and is
inconsistent with the behaviour of sound port, thus seems as though it is
not implemented correctly? Or can anyone give an example of how to use
pjmedia_conf_add_passive_port() correctly?
Many thanks and regards
Lafras
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----- Original Message -----
From: "B. van Klinken" b.vklinken@rohill.nl
To: "'pjsip embedded/DSP SIP discussion'" pjsip@lists.pjsip.org
Sent: Friday, September 21, 2007 12:13 PM
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Hello Benny,
Thanks for your answer.
What we like to have is use something like "Simple PJSUA", but we don't
know
how we get the audio bytes in our own software routines.
We now understand how to disable the soundcard, but the null device is
created. But we still then don't know how we interface with the speech
data.
Can you send us a small piece of source code what we should create to
get
the databytes into and from our own source code.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-20 19:13
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
B. van Klinken wrote:
Hello,
We we're now looking into the pjsip stack and we want to run something
like
"Simple PJSUA" on a dedicated computer without soundcard.
The SIP audio should be exchanged between our existing telecom system
and
the your stack (audio packets).
We tried to find some example for this, but could not find it.
We had a look at "Simple PJSUA", but then we see no audiocard
initialisation
at all (so we don't see where the SIP audio is connected to the audio
card.
If sound device is not initialized by application, PJSUA-LIB will
open the default sound device in pjsua_start(). If you want to use
no device (that is null sound device in pjsua's term), then call
pjsua_set_null_snd_dev() before calling pjsua_start().
In pjsua, you can set pjsua to use no device with --null-audio option.
HTH,
-benny
We found examples regarding the PJMEDIA stack, but we don't see have
to
use
this in the "Simple PJSUA" example.
So we would like to have a simple application where we can put our own
speech packets into the stack and receive spechdata out of the stack.
Is there something like this available or can someone tell us how.
Regards,
B. van Klinken
Sr. Project Engineer
Rohill Technologies B.V.
Edisonstraat 12, 7903 AN Hoogeveen
P.O. Box 373, 7900 AJ Hoogeveen
The Netherlands
Tel: +31 (0)528 263 355
Fax: +31 (0)528 271 844
http://www.rohill.com/
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Just to help a little bit.
If you haven't done so, it will help to read the media port concept
in pjmedia, you can start here:
http://pjsip.org/pjmedia/docs/html/group__PJMEDIA__PORT__CONCEPT.htm
Related to this, there is another page that explains how media flows
between pjmedia components: http://pjsip.org/trac/wiki/media-flow
I hope that explains things a bit.
-benny
B. van Klinken wrote:
OK thanks i will wait for your clean code.
Note: it's no problem for if you send me "hack" version already now, then i
have already something to look at.
Hello Benny,
Thanks, i had seen the pages already, but somehow it's not clear for me how
to realize the requested functionality (my problem).
I understood that i had to use a splitcomb.
I think that it must be for you only a couple of minutes and copy/paste to
modify the "Simple PJSUA", where it works with external data (e.g. store
info a memory bufer and read from another memory buffer.
When i have such an example, i think that this would be enough for me to
make our application.
So can you do that?
I think that such an example would also very useful to have on the website
so othr people can also see how this works.
Regards,
B. van Klinken
-----Original Message-----
From: pjsip-bounces@lists.pjsip.org
[mailto:pjsip-bounces@lists.pjsip.org]On Behalf Of Benny Prijono
Sent: 07-09-21 15:47
To: pjsip embedded/DSP SIP discussion
Subject: Re: [pjsip] Example "Simple PJSUA" without soundcard
Just to help a little bit.
If you haven't done so, it will help to read the media port concept
in pjmedia, you can start here:
http://pjsip.org/pjmedia/docs/html/group__PJMEDIA__PORT__CONCEPT.htm
Related to this, there is another page that explains how media flows
between pjmedia components: http://pjsip.org/trac/wiki/media-flow
I hope that explains things a bit.
-benny
B. van Klinken wrote:
OK thanks i will wait for your clean code.
Note: it's no problem for if you send me "hack" version already now, then
i
have already something to look at.
Visit our blog: http://blog.pjsip.org
pjsip mailing list
pjsip@lists.pjsip.org
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B. van Klinken wrote:
Hello Benny,
Thanks, i had seen the pages already, but somehow it's not clear for me how
to realize the requested functionality (my problem).
I understood that i had to use a splitcomb.
You don't have to, actually. You only need to use splitcomb when
your application wants to actively get and put frames from/to pjmedia.
Alternatively, you can let pjmedia get and put frames from/to your
application instead. To do this, you'll just need to implement a
pjmedia_port, and provide two callbacks (get_frame and put_frame) to
be called by pjmedia. Then register your media port to the
conference bridge by using pjsua_conf_add_port(). This in fact is
the easiest way to manipulate audio frames.
See playsine.c in samples directory for a simple pjmedia_port
implementation.
I think that it must be for you only a couple of minutes and copy/paste to
modify the "Simple PJSUA", where it works with external data (e.g. store
info a memory bufer and read from another memory buffer.
For a splitcomb sample, see stereo_demo() in pjsua_app.c.
For pjmedia_port's that operate on buffer, see mem_capture.c and
mem_player.c in pjmedia. There are a whole bunch of other
pjmedia_port implementations to look at in pjmedia, of course.
cheers,
-benny