[Freeswitch-dev] Using a modem to connect ordinary phones

2009-10-27 Thread Alex To 
Hi,

 

I found the same topic created 2 years back in Oct 2007 but it doesn't seem
to have the answer yet.

 

 I am quite new to FS and having a hard time reading the documentation.
Someone could tell me: how would I use a modem and develop an Endpoint in FS
that I could bridge the call from VoIP to PSTN. I am a hardware engineer, I
am developing this modem and would want to use it with FS. I know that I
could simply buy a VoIP Gateway or a zaptel compatible card and use OpenZap.

 

Could someone point me out the direction for the following matters:

 

1.   I feel that I need to develop an Endpoint module, like mod_sofia,
mod_iax... that controls my modem so I could bridge the call from VoIP to
PSTN ? If that is correct, could someone point me the documentation to start
reading about Endpoint interface .?

2.   Is there any similar module developed before about controlling a
modem using AT Command 

 

Pardon my bad English, I don't come from an English speaking country. Btw,
this is the first time I participate in a mailing list so I still have no
idea how to create a thread or reply to a posting like I normally do in
forums.

 

Thanks very much and any helps are highly appreciated.

 

Regards

 

Alex To

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Re: [Freeswitch-dev] Using a modem to connect ordinary phones

2009-10-27 Thread Alex To 
Thank you very much for your prompt reply Mike

 

The problem is I could simply get everything working by buying a zaptel
compatible card or a VoIP Gateway. However I would like to use the modem
that I am developing since it does provides some additional features. 

 

Does that mean I could start my way reading about Zaptel and develop a
modified version of Zaptel to control my modem ?

 

Thanks for pointing me the way.

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Michael
Jerris
Sent: Wednesday, October 28, 2009 1:23 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Using a modem to connect ordinary phones

 

You are better off creating a zaptel driver than re-creating all that work
that has already been done.

 

Mike

 

On Oct 28, 2009, at 1:05 AM, Alex To wrote:





Hi,

 

I found the same topic created 2 years back in Oct 2007 but it doesn't seem
to have the answer yet.

 

 I am quite new to FS and having a hard time reading the documentation.
Someone could tell me: how would I use a modem and develop an Endpoint in FS
that I could bridge the call from VoIP to PSTN. I am a hardware engineer, I
am developing this modem and would want to use it with FS. I know that I
could simply buy a VoIP Gateway or a zaptel compatible card and use OpenZap.

 

Could someone point me out the direction for the following matters:

 

1.   I feel that I need to develop an Endpoint module, like mod_sofia,
mod_iax... that controls my modem so I could bridge the call from VoIP to
PSTN ? If that is correct, could someone point me the documentation to start
reading about Endpoint interface .?

2.   Is there any similar module developed before about controlling a
modem using AT Command

 

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Re: [Freeswitch-dev] Using a modem to connect ordinary phones

2009-10-28 Thread Alex To 

That is exactly what I am doing now. It's nice knowing somebody is doing the
same thing. The only difference is I am developing for Windows platform. The
modem that I am 

developing uses USB/Serial Port that accepts AT command. Still reading how
should I control audio I/O as to be honest I just got to know FreeSwitch for
less than a week. I 

will be very grateful if you could share your experience. 

Regards

Alex To

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Giovanni
Maruzzelli
Sent: Thursday, October 29, 2009 1:06 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Using a modem to connect ordinary phones

On Wed, Oct 28, 2009 at 6:37 AM, Alex To  wrote:
> The problem is I could simply get everything working by buying a zaptel
> compatible card or a VoIP Gateway. However I would like to use the modem
> that I am developing since it does provides some additional features.
>

It depends on how your modem behave...

Eg: in the past I developed a channel driver that was using
voicemodems and ALSA to interface with PSTN: AT command for call
control and ALSA for audio I/O.

If you are in this situation (your modem accept AT commands, and has a
way to do audio I/O through ALSA or some other interface), then maybe
you would like to wait a little bit until I release a new endpoint for
FreeSWITCH that do this for GSM, and just use that endpoint with
little or no customization.

-giovanni





>
>
> Does that mean I could start my way reading about Zaptel and develop a
> modified version of Zaptel to control my modem ?
>
>
>
> Thanks for pointing me the way.
>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: freeswitch-dev-boun...@lists.freeswitch.org
> [mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Michael
> Jerris
> Sent: Wednesday, October 28, 2009 1:23 PM
> To: freeswitch-dev@lists.freeswitch.org
> Subject: Re: [Freeswitch-dev] Using a modem to connect ordinary phones
>
>
>
> You are better off creating a zaptel driver than re-creating all that work
> that has already been done.
>
>
>
> Mike
>
>
>
> On Oct 28, 2009, at 1:05 AM, Alex To wrote:
>
> Hi,
>
>
>
> I found the same topic created 2 years back in Oct 2007 but it doesn’t
seem
> to have the answer yet.
>
>
>
>  I am quite new to FS and having a hard time reading the documentation.
> Someone could tell me: how would I use a modem and develop an Endpoint in
FS
> that I could bridge the call from VoIP to PSTN. I am a hardware engineer,
I
> am developing this modem and would want to use it with FS. I know that I
> could simply buy a VoIP Gateway or a zaptel compatible card and use
OpenZap.
>
>
>
> Could someone point me out the direction for the following matters:
>
>
>
> 1.   I feel that I need to develop an Endpoint module, like mod_sofia,
> mod_iax... that controls my modem so I could bridge the call from VoIP to
> PSTN ? If that is correct, could someone point me the documentation to
start
> reading about Endpoint interface …?
>
> 2.   Is there any similar module developed before about controlling a
> modem using AT Command
>
>
>
> ___
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> http://www.freeswitch.org
>
>



-- 
Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618

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[Freeswitch-dev] Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-01 Thread Alex To 
Hi, excuse me if this is already asked where else but I did browse through
the mailing list and I couldn't find anything related. I tried to create a
new end point module by copying the mod_skel to mod/endpoints/my_module
folder. 

 

I modified "skel" to my module name and basically I leave no codes in the
load function, just a few lines to test if the new module is working. These
few lines are:

 

*module_interface = switch_loadable_module_create_module_interface(pool,
modname);

  modem_endpoint_interface =
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface, SWITCH_ENDPOINT_INTERFACE);

  modem_endpoint_interface->interface_name = "modem";

  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
World!\n");

  //

  //do_config(SWITCH_FALSE);

  //

  SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
"syntax");

 

  /* indicate that the module should continue to be loaded */

  return SWITCH_STATUS_SUCCESS;

 

It compiles but the module can't load properly. I received the following
error:

 

2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error Loading
module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll

**dll sym error [127l]

**

I tried to load module normally at the FS console but "load mod_skel" and
"load mod_mymodule" gives the same error.

 

Would someone tell me what do I miss here. 

 

Btw, I looked at mod_sofia and mod_iax, this line of code could compile in
those 2 modules.

 

modem_endpoint_interface =
switch_loadable_module_create_interface(*module_interface,
SWITCH_ENDPOINT_INTERFACE);

 

The same line of code couldn't compile in my module coz VS complains: cannot
convert from void* to switch_endpoint_interface_t*. I know C++ require more
type-safe conversion than C but anyone got the same error?

 

And how would I search in the mailing list ? Sorry for this dumb question
but I can't seem to find out how to search in the archives. For now, before
posting anything, I need to try to browse through all the postings first,
which is 

 

quite tedious to do.

 

Regards

 

Alex To

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[Freeswitch-dev] FW: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-01 Thread Alex To 
Sorry, I figured it out by myself. It was because my code file is
mod_mymodule.cpp. I changed it to mod_mymodule.c and the module loaded file.
So I take it as FS accepts only C library but not C++ ?

 

Regards

 

Alex To

 

From: Alex To [mailto:tonhud...@gmail.com] 
Sent: Sunday, November 01, 2009 7:35 PM
To: 'freeswitch-dev@lists.freeswitch.org'
Subject: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error
Loading module  **dll sym error [127l]

 

Hi, excuse me if this is already asked where else but I did browse through
the mailing list and I couldn't find anything related. I tried to create a
new end point module by copying the mod_skel to mod/endpoints/my_module
folder. 

 

I modified "skel" to my module name and basically I leave no codes in the
load function, just a few lines to test if the new module is working. These
few lines are:

 

*module_interface = switch_loadable_module_create_module_interface(pool,
modname);

  modem_endpoint_interface =
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface, SWITCH_ENDPOINT_INTERFACE);

  modem_endpoint_interface->interface_name = "modem";

  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
World!\n");

  //

  //do_config(SWITCH_FALSE);

  //

  SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
"syntax");

 

  /* indicate that the module should continue to be loaded */

  return SWITCH_STATUS_SUCCESS;

 

It compiles but the module can't load properly. I received the following
error:

 

2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error Loading
module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll

**dll sym error [127l]

**

I tried to load module normally at the FS console but "load mod_skel" and
"load mod_mymodule" gives the same error.

 

Would someone tell me what do I miss here. 

 

Btw, I looked at mod_sofia and mod_iax, this line of code could compile in
those 2 modules.

 

modem_endpoint_interface =
switch_loadable_module_create_interface(*module_interface,
SWITCH_ENDPOINT_INTERFACE);

 

The same line of code couldn't compile in my module coz VS complains: cannot
convert from void* to switch_endpoint_interface_t*. I know C++ require more
type-safe conversion than C but anyone got the same error?

 

And how would I search in the mailing list ? Sorry for this dumb question
but I can't seem to find out how to search in the archives. For now, before
posting anything, I need to try to browse through all the postings first,
which is 

 

quite tedious to do.

 

Regards

 

Alex To

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Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-01 Thread Alex To 
Right

I checked it again and I did miss some information. I am modifying my module
to be written in C++.

Thank you.

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Giovanni
Maruzzelli
Sent: Sunday, November 01, 2009 9:05 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

On Sun, Nov 1, 2009 at 12:44 PM, Alex To  wrote:
> Sorry, I figured it out by myself. It was because my code file is
> mod_mymodule.cpp. I changed it to mod_mymodule.c and the module loaded
file.
> So I take it as FS accepts only C library but not C++ ?

Ciao Alex,

no, you're on the wrong track. FS loads CPP modules.

Your problems probably come because mod_skel is a C module, and the
Makefile for it manages it as a C module.

If you want to compile a CPP module, find one as an example, and
adjust yourmodule and its Makefile to be compiled in a similar way.
I've done it, and I can assure it works.

In this moment I cannot tell you out of my memory which module is CPP,
but just browse the sources looking for *.cc or *.cpp.

-giovanni





>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: Alex To [mailto:tonhud...@gmail.com]
> Sent: Sunday, November 01, 2009 7:35 PM
> To: 'freeswitch-dev@lists.freeswitch.org'
> Subject: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error
> Loading module  **dll sym error [127l]
>
>
>
> Hi, excuse me if this is already asked where else but I did browse through
> the mailing list and I couldn’t find anything related. I tried to create a
> new end point module by copying the mod_skel to mod/endpoints/my_module
> folder.
>
>
>
> I modified “skel” to my module name and basically I leave no codes in the
> load function, just a few lines to test if the new module is working.
These
> few lines are:
>
>
>
> *module_interface = switch_loadable_module_create_module_interface(pool,
> modname);
>
>   modem_endpoint_interface =
>
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>   modem_endpoint_interface->interface_name = "modem";
>
>   switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
> World!\n");
>
>   //
>
>   //do_config(SWITCH_FALSE);
>
>   //
>
>   SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
> "syntax");
>
>
>
>   /* indicate that the module should continue to be loaded */
>
>   return SWITCH_STATUS_SUCCESS;
>
>
>
> It compiles but the module can’t load properly. I received the following
> error:
>
>
>
> 2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error
Loading
> module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll
>
> **dll sym error [127l]
>
> **
>
> I tried to load module normally at the FS console but “load mod_skel” and
> “load mod_mymodule” gives the same error.
>
>
>
> Would someone tell me what do I miss here.
>
>
>
> Btw, I looked at mod_sofia and mod_iax, this line of code could compile in
> those 2 modules.
>
>
>
> modem_endpoint_interface =
> switch_loadable_module_create_interface(*module_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>
>
> The same line of code couldn’t compile in my module coz VS complains:
cannot
> convert from void* to switch_endpoint_interface_t*. I know C++ require
more
> type-safe conversion than C but anyone got the same error?
>
>
>
> And how would I search in the mailing list ? Sorry for this dumb question
> but I can’t seem to find out how to search in the archives. For now,
before
> posting anything, I need to try to browse through all the postings first,
> which is
>
>
>
> quite tedious to do.
>
>
>
> Regards
>
>
>
> Alex To
>
> ___
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev@lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>



-- 
Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618

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Re: [Freeswitch-dev] mod managed, cant receive events thru EventReceivedFunction callback

2009-11-02 Thread Alex To 
Hi, I would like to raise this question again since it doesn't seem to have
an answer yet.

 

I built a .NET module which implements IAppPlugin and IApiPlugin. I looked
at the /contrib/verifier/eventsocket and it is actually the client to
connect to FS through mod_event_socket (correct me if I'm wrong here). 
 
I believe Andrew's concern was how to receive events through
EventReceivedFunctionCallback but not connect to FS and receive event via
TCP/IP. 
 
I would want to implement a .NET module that acts like an endpoint. Could
someone show me the direction of how to hook up handlers like it is done in
native C++? 
 
How would I read the incoming audio data and how would I send audio as an
outgoing stream. 
 
I setup the .NET module and dial plan so that the Run() method in my module
is invoked whenever a call is bridged to my endpoint. The ParkingLot and
Demo script sample does enlighten me a little but I still have no clue how
would I go about the audio stream after I call session.Answer().
 
Any help would be greatly appreciated. 
 
Best Regards
 
Alex To
 
 

 

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Re: [Freeswitch-dev] mod managed, cant receive events thru EventReceivedFunction callback

2009-11-02 Thread Alex To 
Oh thank you Michael for answering  all my dumb questions. :D I agree with
you Interoperability between unmanaged and managed code is such a PITA. I
think I am going back to C++ module for the moment since the unmanaged API
isn't "made easy" in managed code yet. If I have the time later, I will go
back and read the managed part, hopefully I could contribute to the managed
part in FS.

 

Regards

 

Alex To

 

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Michael
Giagnocavo
Sent: Monday, November 02, 2009 8:34 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] mod managed, cant receive events thru
EventReceivedFunction callback

 

Basically, if you want to do something that's not "made easy" for language
plugins, you just do it the C way, like any other FreeSWITCH C module. The
mod_managed swig wrappers expose nearly every function.

 

The difficult part is that some of the indirect types (pointers to types and
function pointers) aren't swig'd very nicely, and just have a wrapper class
such as "SWIGTYPE_p_foo_t". In this case, you're required to create the
backing structure however required, then get a pointer to that structure and
wrap it in the SWIGTYPE_p_xxx class. If your backing structure is a .NET
type, you can use GCHandle to get an IntPtr to it. Or you can directly
allocate memory via the Marshal class and use that IntPtr. This is likely to
be annoying and a lot of work.

 

It's only really easy for function pointers, as all you need to do is
declare a delegate, attribute it
[UnmanagedFunctionPointer(CallingConvention.Cdecl)], then call
Marshal.GetFunctionPointerForDelegate. The runtime will emit unmanaged stubs
that will handle unmanaged-managed transitioning and give you a nice C
compatible function pointer you can wrap and pass around. You can see some
examples in ManagedSession.cs. 

 

Additionally, the SWIGTYPE_p_xxx classes don't have public constructors, so
the FSUtil class provides this extension method on IntPtr:

 

public static T CreateSwigTypePointer(this IntPtr cPtr)

 

That way you can create the wrapper classes as needed after you've created
the structures and wrapped them up.

 

In summary, it's possible to create an endpoint module from C#, but a major
PITA. You should consider either using a mixed-mode language such as C++/CLI
or write a helper library in C/C++ and export that via swig. We'd welcome
contributions to mod_managed that simplify access to a set of the FS APIs.

 

-Michael

 

 

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Alex To
Sent: Monday, November 02, 2009 5:19 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] mod managed, cant receive events thru
EventReceivedFunction callback

 

Hi, I would like to raise this question again since it doesn't seem to have
an answer yet.

 

I built a .NET module which implements IAppPlugin and IApiPlugin. I looked
at the /contrib/verifier/eventsocket and it is actually the client to
connect to FS through mod_event_socket (correct me if I'm wrong here). 
 
I believe Andrew's concern was how to receive events through
EventReceivedFunctionCallback but not connect to FS and receive event via
TCP/IP. 
 
I would want to implement a .NET module that acts like an endpoint. Could
someone show me the direction of how to hook up handlers like it is done in
native C++? 
 
How would I read the incoming audio data and how would I send audio as an
outgoing stream. 
 
I setup the .NET module and dial plan so that the Run() method in my module
is invoked whenever a call is bridged to my endpoint. The ParkingLot and
Demo script sample does enlighten me a little but I still have no clue how
would I go about the audio stream after I call session.Answer().
 
Any help would be greatly appreciated. 
 
Best Regards
 
Alex To
 
 

 

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Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-02 Thread Alex To 
Hi, I copied mod_opal to mod_mymodule which is C++ module and remove all the
codes. I copied mod_skel.c to my module and rename it to .cpp. Compiled fine
in VS 2008 SP1 but 

still I couldn't load the module in FS. The FS console still complains "dll
sym error.". If I rename mod_mymodule.cpp to .c, it loaded successfully.

Hmm, what do I miss here ? any special trick to load a C++ module in FS ?

Alex

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Giovanni
Maruzzelli
Sent: Sunday, November 01, 2009 9:05 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

On Sun, Nov 1, 2009 at 12:44 PM, Alex To  wrote:
> Sorry, I figured it out by myself. It was because my code file is
> mod_mymodule.cpp. I changed it to mod_mymodule.c and the module loaded
file.
> So I take it as FS accepts only C library but not C++ ?

Ciao Alex,

no, you're on the wrong track. FS loads CPP modules.

Your problems probably come because mod_skel is a C module, and the
Makefile for it manages it as a C module.

If you want to compile a CPP module, find one as an example, and
adjust yourmodule and its Makefile to be compiled in a similar way.
I've done it, and I can assure it works.

In this moment I cannot tell you out of my memory which module is CPP,
but just browse the sources looking for *.cc or *.cpp.

-giovanni





>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: Alex To [mailto:tonhud...@gmail.com]
> Sent: Sunday, November 01, 2009 7:35 PM
> To: 'freeswitch-dev@lists.freeswitch.org'
> Subject: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error
> Loading module  **dll sym error [127l]
>
>
>
> Hi, excuse me if this is already asked where else but I did browse through
> the mailing list and I couldn’t find anything related. I tried to create a
> new end point module by copying the mod_skel to mod/endpoints/my_module
> folder.
>
>
>
> I modified “skel” to my module name and basically I leave no codes in the
> load function, just a few lines to test if the new module is working.
These
> few lines are:
>
>
>
> *module_interface = switch_loadable_module_create_module_interface(pool,
> modname);
>
>   modem_endpoint_interface =
>
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>   modem_endpoint_interface->interface_name = "modem";
>
>   switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
> World!\n");
>
>   //
>
>   //do_config(SWITCH_FALSE);
>
>   //
>
>   SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
> "syntax");
>
>
>
>   /* indicate that the module should continue to be loaded */
>
>   return SWITCH_STATUS_SUCCESS;
>
>
>
> It compiles but the module can’t load properly. I received the following
> error:
>
>
>
> 2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error
Loading
> module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll
>
> **dll sym error [127l]
>
> **
>
> I tried to load module normally at the FS console but “load mod_skel” and
> “load mod_mymodule” gives the same error.
>
>
>
> Would someone tell me what do I miss here.
>
>
>
> Btw, I looked at mod_sofia and mod_iax, this line of code could compile in
> those 2 modules.
>
>
>
> modem_endpoint_interface =
> switch_loadable_module_create_interface(*module_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>
>
> The same line of code couldn’t compile in my module coz VS complains:
cannot
> convert from void* to switch_endpoint_interface_t*. I know C++ require
more
> type-safe conversion than C but anyone got the same error?
>
>
>
> And how would I search in the mailing list ? Sorry for this dumb question
> but I can’t seem to find out how to search in the archives. For now,
before
> posting anything, I need to try to browse through all the postings first,
> which is
>
>
>
> quite tedious to do.
>
>
>
> Regards
>
>
>
> Alex To
>
> ___
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev@lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>



-- 
Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618

___
F

Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-04 Thread Alex To 
Anyone out there have built and loaded successfully a C++ module using
Visual Studio 2008 SP1 with FS?

This error really got me frustrated these few days. I can't seem to load a
C++ module in FS, the error is "dll sym error [1271]"

If I rename the code file to .c or change the compile option to "Compile as
C code", the module loads fine. If I compile using option "Compile as C++
code" then I got the 

error.

Would really appreciate it if anyone could shed some lights. It must be a
setting somewhere in VS or in FS ?? I build FS on Windows 7 x64, VS 2008
SP1, Windows SDK 7.0, build target win32.

Regards

Alex To

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Giovanni
Maruzzelli
Sent: Sunday, November 01, 2009 9:05 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

On Sun, Nov 1, 2009 at 12:44 PM, Alex To  wrote:
> Sorry, I figured it out by myself. It was because my code file is
> mod_mymodule.cpp. I changed it to mod_mymodule.c and the module loaded
file.
> So I take it as FS accepts only C library but not C++ ?

Ciao Alex,

no, you're on the wrong track. FS loads CPP modules.

Your problems probably come because mod_skel is a C module, and the
Makefile for it manages it as a C module.

If you want to compile a CPP module, find one as an example, and
adjust yourmodule and its Makefile to be compiled in a similar way.
I've done it, and I can assure it works.

In this moment I cannot tell you out of my memory which module is CPP,
but just browse the sources looking for *.cc or *.cpp.

-giovanni





>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: Alex To [mailto:tonhud...@gmail.com]
> Sent: Sunday, November 01, 2009 7:35 PM
> To: 'freeswitch-dev@lists.freeswitch.org'
> Subject: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error
> Loading module  **dll sym error [127l]
>
>
>
> Hi, excuse me if this is already asked where else but I did browse through
> the mailing list and I couldn’t find anything related. I tried to create a
> new end point module by copying the mod_skel to mod/endpoints/my_module
> folder.
>
>
>
> I modified “skel” to my module name and basically I leave no codes in the
> load function, just a few lines to test if the new module is working.
These
> few lines are:
>
>
>
> *module_interface = switch_loadable_module_create_module_interface(pool,
> modname);
>
>   modem_endpoint_interface =
>
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>   modem_endpoint_interface->interface_name = "modem";
>
>   switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
> World!\n");
>
>   //
>
>   //do_config(SWITCH_FALSE);
>
>   //
>
>   SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
> "syntax");
>
>
>
>   /* indicate that the module should continue to be loaded */
>
>   return SWITCH_STATUS_SUCCESS;
>
>
>
> It compiles but the module can’t load properly. I received the following
> error:
>
>
>
> 2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error
Loading
> module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll
>
> **dll sym error [127l]
>
> **
>
> I tried to load module normally at the FS console but “load mod_skel” and
> “load mod_mymodule” gives the same error.
>
>
>
> Would someone tell me what do I miss here.
>
>
>
> Btw, I looked at mod_sofia and mod_iax, this line of code could compile in
> those 2 modules.
>
>
>
> modem_endpoint_interface =
> switch_loadable_module_create_interface(*module_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>
>
> The same line of code couldn’t compile in my module coz VS complains:
cannot
> convert from void* to switch_endpoint_interface_t*. I know C++ require
more
> type-safe conversion than C but anyone got the same error?
>
>
>
> And how would I search in the mailing list ? Sorry for this dumb question
> but I can’t seem to find out how to search in the archives. For now,
before
> posting anything, I need to try to browse through all the postings first,
> which is
>
>
>
> quite tedious to do.
>
>
>
> Regards
>
>
>
> Alex To
>
> ___
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev@lists.freeswitch.org
> http://lists.freesw

Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error Loading module .... **dll sym error [127l]

2009-11-04 Thread Alex To 
Thanks Mike for the hint. I figured it out. To avoid this error, I need to
wrap the part where we define the SWITCH_MODULE_..._FUNCTION inside
SWITCH_BEGIN_EXTERN_C AND SWITCH_END_EXTERN_C.

It is now loaded fine.

Regards

Alex To


-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Michael
Giagnocavo
Sent: Wednesday, November 04, 2009 8:30 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

mod_managed is C++ and builds and loads fine. You could look at that and
compare options and code. (Actually, all of the language plugins should be
C++.)

-Michael

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Alex To
Sent: Wednesday, November 04, 2009 5:02 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

Anyone out there have built and loaded successfully a C++ module using
Visual Studio 2008 SP1 with FS?

This error really got me frustrated these few days. I can't seem to load a
C++ module in FS, the error is "dll sym error [1271]"

If I rename the code file to .c or change the compile option to "Compile as
C code", the module loads fine. If I compile using option "Compile as C++
code" then I got the 

error.

Would really appreciate it if anyone could shed some lights. It must be a
setting somewhere in VS or in FS ?? I build FS on Windows 7 x64, VS 2008
SP1, Windows SDK 7.0, build target win32.

Regards

Alex To

-Original Message-
From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Giovanni
Maruzzelli
Sent: Sunday, November 01, 2009 9:05 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] FW: Visual Studio 2008 Pro SP1:
switch_loadable_module.c:871 Error Loading module  **dll sym error
[127l]

On Sun, Nov 1, 2009 at 12:44 PM, Alex To  wrote:
> Sorry, I figured it out by myself. It was because my code file is
> mod_mymodule.cpp. I changed it to mod_mymodule.c and the module loaded
file.
> So I take it as FS accepts only C library but not C++ ?

Ciao Alex,

no, you're on the wrong track. FS loads CPP modules.

Your problems probably come because mod_skel is a C module, and the
Makefile for it manages it as a C module.

If you want to compile a CPP module, find one as an example, and
adjust yourmodule and its Makefile to be compiled in a similar way.
I've done it, and I can assure it works.

In this moment I cannot tell you out of my memory which module is CPP,
but just browse the sources looking for *.cc or *.cpp.

-giovanni





>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: Alex To [mailto:tonhud...@gmail.com]
> Sent: Sunday, November 01, 2009 7:35 PM
> To: 'freeswitch-dev@lists.freeswitch.org'
> Subject: Visual Studio 2008 Pro SP1: switch_loadable_module.c:871 Error
> Loading module  **dll sym error [127l]
>
>
>
> Hi, excuse me if this is already asked where else but I did browse through
> the mailing list and I couldn't find anything related. I tried to create a
> new end point module by copying the mod_skel to mod/endpoints/my_module
> folder.
>
>
>
> I modified "skel" to my module name and basically I leave no codes in the
> load function, just a few lines to test if the new module is working.
These
> few lines are:
>
>
>
> *module_interface = switch_loadable_module_create_module_interface(pool,
> modname);
>
>   modem_endpoint_interface =
>
(switch_endpoint_interface_t*)switch_loadable_module_create_interface(*modul
e_interface,
> SWITCH_ENDPOINT_INTERFACE);
>
>   modem_endpoint_interface->interface_name = "modem";
>
>   switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello
> World!\n");
>
>   //
>
>   //do_config(SWITCH_FALSE);
>
>   //
>
>   SWITCH_ADD_API(api_interface, "modem", "Modem API", modem_function,
> "syntax");
>
>
>
>   /* indicate that the module should continue to be loaded */
>
>   return SWITCH_STATUS_SUCCESS;
>
>
>
> It compiles but the module can't load properly. I received the following
> error:
>
>
>
> 2009-11-01 19:18:10.551180 [CRIT] switch_loadable_module.c:871 Error
Loading
> module D:\Projects\freeswitch\Debug\mod\mod_mymodule.dll
>
> **dll sym error [127l]
>
> **
>
> I tried to load module normally at the FS console but "load mo

[Freeswitch-dev] Questions about read_frame and write_frame events

2009-11-08 Thread Alex To 
Hi,

 

I am getting stuck on read_frame and write_frame in my custom endpoint.
Would someone shed some lights on how it works?

 

My questions about read_frame, write_frame after reading mod_iax,
mod_portaudio and mod_skyiax are:

 

1.   Is it correct that I need to check a flag (for e.g TFLAG_HUP)  of
the private object at the beginning of the event to determine whether I
should continue reading audio or just return. The flag TFLAG_HUP is set when
a hangup or kill channel event is detected.

2.   Read_frame is called on an interval (how frequently is the interval
? how do I determine that?) to read audio from my endpoint.

3.   What is TFLAG_IO normally used for ?

4.   What is the label "cng" is all about ? May I know what "cng" stands
for and how it is used?

5.   What if read_frame is called while my end point is not ready to
send any audio yet?

6.   What is the tech_pvt->cng_frame is used for? I notice that the
*frame is set to tech_pvt->cng_frame if the label "cng" is reached.

 

Thank you very much for even reading my questions. I tried to look for
documents that explains clearly the above questions but so far no luck.
Until now I still don't have a clear understanding about these 2 events yet.

 

Best Regards

 

Alex To

___
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http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
http://www.freeswitch.org

Re: [Freeswitch-dev] Questions about read_frame and write_frame events

2009-11-09 Thread Alex To 
Thank you very much Mathieu

 

So if TFLAG_IO is not set, read_frame will return immediately and *frame is
NULL ? Is it a normal behavior if the call is terminated when a NULL frame
is returned ? 

 

Coz when I return a NULL frame, the call is terminated. So now my
understanding is that if my endpoint buffer is empty, I need to return a
silence frame to the other end, right?

 

Thank again Mathieu for your quick reply, that helps a lot J.

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Mathieu
Rene
Sent: Monday, November 09, 2009 2:54 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Questions about read_frame and write_frame
events

 

Hi,

 

See answers inline.

 

Mathieu Rene

Avant-Garde Solutions Inc

Office: + 1 (514) 664-1044 x100

Cell: +1 (514) 664-1044 x200

mr...@avgs.ca

 

 

 

 

On 8-Nov-09, at 4:21 AM, Alex To wrote:





Hi,

 

I am getting stuck on read_frame and write_frame in my custom endpoint.
Would someone shed some lights on how it works?

 

My questions about read_frame, write_frame after reading mod_iax,
mod_portaudio and mod_skyiax are:

 

1.   Is it correct that I need to check a flag (for e.g TFLAG_HUP)  of
the private object at the beginning of the event to determine whether I
should continue reading audio or just return. The flag TFLAG_HUP is set when
a hangup or kill channel event is detected.

Thats what TFLAG_IO is for, clear the flag the read_frame functions should
return immediately.

If you catch TFLAG_BREAK, on the other side, you should clear it and return
a comfort noise frame ( cng )



2.   Read_frame is called on an interval (how frequently is the interval
? how do I determine that?) to read audio from my endpoint.

It depends on the codec you are using, if you are using 20 packetization
time, it'll be called every 20ms.



3.   What is TFLAG_IO normally used for ?

See point 1



4.   What is the label "cng" is all about ? May I know what "cng" stands
for and how it is used?

CNG stands for Comfort Noise Generation, whenever read_frame jumps there, it
returns a frame of silence. It it first initialized on private_t since its
pointless to re-allocate empty frames.



5.   What if read_frame is called while my end point is not ready to
send any audio yet?

That's why you set TFLAG_IO whenever you are ready. Also note that it wont
be called until you either pre_answer (go in early media) or answer the
channel.

When a call is made, switch_ivr_originate() doesn't return until your
endpoint is ready to exchange audio.

6.   What is the tech_pvt->cng_frame is used for? I notice that the
*frame is set to tech_pvt->cng_frame if the label "cng" is reached.

See point 4.



 

Thank you very much for even reading my questions. I tried to look for
documents that explains clearly the above questions but so far no luck.
Until now I still don't have a clear understanding about these 2 events yet.

 

Best Regards

 

Alex To

___
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http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
http://www.freeswitch.org

 

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http://www.freeswitch.org

Re: [Freeswitch-dev] Questions about read_frame and write_frame events

2009-11-10 Thread Alex To 
Thanks  very much Anthony.

 

It is quite clear now but I wonder if anyone could suggest me the proper way
to go about this problem

 

My device has a buffer of 64 bytes equal to 8 ms of PCMA/PCMU so in the
write_frame I need to write 64 bytes of PCMA to the device every 8 ms.
Attempt to more at a time will cause frames lost. 

 

However, codecs in freeswitch only support ptime of multiple of 10 (10, 20,
30, 40.) so the work around that I go for is to take ptime = 40 ms since 40
can device by 8.

 

It means, every 40 ms the write_frame event will be called right? And the
frame->data will have 320 bytes so I try to write to the device 5 times,
each time 64 bytes. Still trying different ways for this problem as I
haven't achieved a good timing yet. 

 

Anybody has added support for ptime of multiple of 2, 4 or 8 for G711 before
?

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Tuesday, November 10, 2009 2:00 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Questions about read_frame and write_frame
events

 

yes you must return a frame marked SFF_CNG rather than a NULL frame.

The TFLAG flags are all arbitrary, you can get rid of all of them if you
wish they are just an example of how those modules communicate internally.
Sometimes they were used for the host technology to have a way to mark the
channel so the call should die but you may get the same effect by just
hanging up the channel since the core now does a lot of this and may never
let your read func even be called.



On Mon, Nov 9, 2009 at 3:54 AM, Alex To  wrote:

Thank you very much Mathieu

 

So if TFLAG_IO is not set, read_frame will return immediately and *frame is
NULL ? Is it a normal behavior if the call is terminated when a NULL frame
is returned ? 

 

Coz when I return a NULL frame, the call is terminated. So now my
understanding is that if my endpoint buffer is empty, I need to return a
silence frame to the other end, right?

 

Thank again Mathieu for your quick reply, that helps a lot J.

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Mathieu
Rene
Sent: Monday, November 09, 2009 2:54 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Questions about read_frame and write_frame
events

 

Hi,

 

See answers inline.

 

Mathieu Rene

Avant-Garde Solutions Inc

Office: + 1 (514) 664-1044 x100

Cell: +1 (514) 664-1044 x200

mr...@avgs.ca

 

 

 

 

On 8-Nov-09, at 4:21 AM, Alex To wrote:

 

Hi,

 

I am getting stuck on read_frame and write_frame in my custom endpoint.
Would someone shed some lights on how it works?

 

My questions about read_frame, write_frame after reading mod_iax,
mod_portaudio and mod_skyiax are:

 

1.   Is it correct that I need to check a flag (for e.g TFLAG_HUP)  of
the private object at the beginning of the event to determine whether I
should continue reading audio or just return. The flag TFLAG_HUP is set when
a hangup or kill channel event is detected.

Thats what TFLAG_IO is for, clear the flag the read_frame functions should
return immediately.

If you catch TFLAG_BREAK, on the other side, you should clear it and return
a comfort noise frame ( cng )

2.   Read_frame is called on an interval (how frequently is the interval
? how do I determine that?) to read audio from my endpoint.

It depends on the codec you are using, if you are using 20 packetization
time, it'll be called every 20ms.

3.   What is TFLAG_IO normally used for ?

See point 1

4.   What is the label "cng" is all about ? May I know what "cng" stands
for and how it is used?

CNG stands for Comfort Noise Generation, whenever read_frame jumps there, it
returns a frame of silence. It it first initialized on private_t since its
pointless to re-allocate empty frames.

5.   What if read_frame is called while my end point is not ready to
send any audio yet?

That's why you set TFLAG_IO whenever you are ready. Also note that it wont
be called until you either pre_answer (go in early media) or answer the
channel.

When a call is made, switch_ivr_originate() doesn't return until your
endpoint is ready to exchange audio.

6.   What is the tech_pvt->cng_frame is used for? I notice that the
*frame is set to tech_pvt->cng_frame if the label "cng" is reached.

See point 4.

 

Thank you very much for even reading my questions. I tried to look for
documents that explains clearly the above questions but so far no luck.
Until now I still don't have a clear understanding about these 2 events yet.

 

Best Regards

 

Alex To

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http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
UNSUBSCRIBE

Re: [Freeswitch-dev] pls help

2009-12-28 Thread Alex To 
I have been with FreeSwitch for not so long but why don't you provide more
details about exactly what you want to do? Maybe I will be able to share
some thing.

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of miracle
2012
Sent: Monday, December 28, 2009 3:22 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: [Freeswitch-dev] pls help

 

Hi,

please provide any example c programs , APIs info, reference as i want to
write a dialer in c with freeswitch. 
i am a newbie for free switch... :|

thanks. 

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[Freeswitch-dev] Need some explainations about method switch_core_session_run(switch_core_session_t *session) in switch_core_state_machine.c

2010-01-06 Thread Alex To 
Hi,

 

First of all, pardon my English. English isn’t my native language J.

 

I am reading the method switch_core_session_run(switch_core_session_t
*session) and I would be really appreciated if someone could shed some light
on how the method works. Below is the logic according to my understanding:

 

1.   LINE 303:  while ((state =
switch_channel_get_state(session->channel)) != CS_DESTROY) 

ð  if state is CS_DESTROY return and do nothing ?

 

2.   Inside if (state !=
switch_channel_get_running_state(session->channel) || state >= CS_HANGUP) 

{ 

… 

}  

a.   LINE 308:  state !=
switch_channel_get_running_state(session->channel) || state >= CS_HANGUP

ð  to check if channel->state and channel->running_state not equal. This is
to avoid running the STATE_MACRO multiple times. However I don’t understand
why do we need (state >= CS_HANGUP) ?.

b.  Inside STATE_MACRO code block

   i.  LINE
229:  midstate = state

ð   to save the current state.

 ii.  LINE
231:  if (!driver_state_handler->on_##__STATE ||
(driver_state_handler->on_##__STATE(session) == SWITCH_STATUS_SUCCESS)

ð  to check either endpoint_interface->state_handler is NULL or return
SWITCH_STATUS_SUCCESS so it will continue to execute handlers in
session->channel, runtime.state_handlers and core standard state handlers.
It means if the condition is not true, channel->state_handlers,
runtime.state_handlers and core standard state handlers will NOT be executed
at all ?

iii.  LINE
246:  if (!proceed) global_proceed = 0;

ð  If something wrong in the previous while loop, do not run core standard
state handlers ?

   iv.  LINE
247:  proceed = 1;


LINE 248:  while (do_extra_handlers && proceed &&
(application_state_handler = switch_core_get_state_handler(index++)) != 0) {
…}

ð  Since we set proceed = 1, do we still need (&& proceed) inside the
condition in while loop ?

 v.  LINE
260:  if (!proceed || midstate !=
switch_channel_get_state(session->channel)) global_proceed = 0;

ð  If not proceed or the channel state has changed by some of the state
handlers executed earlier, do not execute core standard state handler ?

   vi.  LINE
266:  while (silly)

ð  silly is never changed, does it mean we could go into an endless while
loop ?

 

Sorry for the long email and some questions are probably dumb but I am
trying to understand about FreeSwitch, especially the core and the core
state machine. If it is documented somewhere about the workflow happening
inside FreeSwitch, please enlighten me as what I am doing now is to read the
code line by line and figure out which may not be the most efficient .

 

Thank you for reading this

 

Regards

 

Alex To

 

 

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Re: [Freeswitch-dev] Need some explainations about method switch_core_session_run(switch_core_session_t *session) in switch_core_state_machine.c

2010-01-06 Thread Alex To 
Hi, Anthony

 

I appreciate you spend your time answering my questions. I have no problem
with FreeSwitch. Since you ask, I am digging into this code because I am
trying to understand how FreeSwitch works inside the core, probably will
take me a great deal of time but I am trying.

 

I wrote a custom EndPoint  in FreeSwitch before to run a modem created by
the hardware engineer team. Basically it is similar to Zaptel compatible
card. The Modem Endpoint runs in FreeSwitch to provide PSTN Connectivity
that uses our specific modem.

 

While working with FreeSwitch, I have this idea to implement something
similar to FreeSwitch in 100% .NET managed code. Of course I am not
expecting it to be as mature as FreeSwitch but something basic first. A core
that allows me to write pluggable modules, basic dial plan and the the first
supported endpoint would be XMMP since I had some experience working with
this XMMP .Net library before.

 

The ultimate aim is code readability, simplicity and maintainability. I have
some other aims too but basically this is it, mostly. I am working on this
as a personal hobby project only J.

 

Cheers

 

Alex To

  

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Thursday, January 07, 2010 12:16 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Need some explainations about method
switch_core_session_run(switch_core_session_t *session) in
switch_core_state_machine.c

 

 

On Wed, Jan 6, 2010 at 9:20 AM, Alex To  wrote:

Hi,

 

First of all, pardon my English. English isn’t my native language J.

 

I am reading the method switch_core_session_run(switch_core_session_t
*session) and I would be really appreciated if someone could shed some light
on how the method works. Below is the logic according to my understanding:

 

1.   LINE 303:  while ((state =
switch_channel_get_state(session->channel)) != CS_DESTROY) 

ð  if state is CS_DESTROY return and do nothing ?

 

state typically starts at CS_NEW the loop runs until state destroy is
reached 


 

2.   Inside if (state !=
switch_channel_get_running_state(session->channel) || state >= CS_HANGUP) 

{ 

… 

}  

a.   LINE 308:  state !=
switch_channel_get_running_state(session->channel) || state >= CS_HANGUP

ð  to check if channel->state and channel->running_state not equal. This is
to avoid running the STATE_MACRO multiple times. However I don’t understand
why do we need (state >= CS_HANGUP) ?.


Once we are >= HANGUP we dont want to do that test anymore.
 

b.  Inside STATE_MACRO code block

   i.  LINE
229:  midstate = state

ð   to save the current state.

 ii.  LINE
231:  if (!driver_state_handler->on_##__STATE ||
(driver_state_handler->on_##__STATE(session) == SWITCH_STATUS_SUCCESS)

ð  to check either endpoint_interface->state_handler is NULL or return
SWITCH_STATUS_SUCCESS so it will continue to execute handlers in
session->channel, runtime.state_handlers and core standard state handlers.
It means if the condition is not true, channel->state_handlers,
runtime.state_handlers and core standard state handlers will NOT be executed
at all ?

iii.  LINE
246:  if (!proceed) global_proceed = 0;

ð  If something wrong in the previous while loop, do not run core standard
state handlers ?

yes the endpoints have the power to veto state handlers from being called


 

   iv.  LINE
247:  proceed = 1;


LINE 248:  while (do_extra_handlers && proceed &&
(application_state_handler = switch_core_get_state_handler(index++)) != 0) {
…}

ð  Since we set proceed = 1, do we still need (&& proceed) inside the
condition in while loop ?

yes because proceed can become 0 within that loop

 

 v.  LINE
260:  if (!proceed || midstate !=
switch_channel_get_state(session->channel)) global_proceed = 0;

ð  If not proceed or the channel state has changed by some of the state
handlers executed earlier, do not execute core standard state handler ?

Again, veto power.
 

   vi.  LINE
266:  while (silly)

ð  silly is never changed, does it mean we could go into an endless while
loop ?

 

Its to stop the compiler from getting mad, that's why it's called silly its
specific to using a while loop inside a macro

 

Sorry for the long email and some questions are probably dumb but I am
trying to understand about FreeSwitch, especial

[Freeswitch-dev] Help on switch_channel_expand_variables(switch_channel_t *channel, const char *in)

2010-01-19 Thread Alex To 
Hi,

 

Could somebody shed some lights on how the mentioned method works ? What
does it do exactly ? My best guess is it takes in a channel, a string and
does something to the string (escape the string ? split the string ? or
something like that? But why need a channel parameter?)

 

If there is already an explanation somewhere about this, please point it out
for me or possibly just tell me what configuration should I make to trigger
this method to be called. I can use debugger and figure it out by myself.

 

Any help would be greatly appreciated.

 

Thanks very much

 

Regards

 

Alex To

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Re: [Freeswitch-dev] Help on switch_channel_expand_variables(switch_channel_t *channel, const char *in)

2010-01-20 Thread Alex To 
Thanks Anthony and Rupa, it's clear now. J

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Thursday, January 21, 2010 2:49 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Help on
switch_channel_expand_variables(switch_channel_t *channel, const char *in)

 

say you had 2 vars test1=foo and test2=bar

it would turn the string "${test1} ${test2}" into "foo bar"
if the returned string does not return the exact pointer that was input, it
must be freed.



On Wed, Jan 20, 2010 at 12:04 AM, Alex To  wrote:

Hi,

 

Could somebody shed some lights on how the mentioned method works ? What
does it do exactly ? My best guess is it takes in a channel, a string and
does something to the string (escape the string ? split the string ? or
something like that? But why need a channel parameter?)

 

If there is already an explanation somewhere about this, please point it out
for me or possibly just tell me what configuration should I make to trigger
this method to be called. I can use debugger and figure it out by myself.

 

Any help would be greatly appreciated.

 

Thanks very much

 

Regards

 

Alex To


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[Freeswitch-dev] Need help on switch_ivr_originate(...) in switch_ivr_originate.c

2010-01-26 Thread Alex To 
Hi,

 

Would somebody enlighten me on this trunk of code in the mentioned file at
line 2273:

 

if (local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

if (vdata) {

  char *var_array[1024] = { 0 };

  int var_count = 0;

  if ((var_count = switch_separate_string(vdata,
'|', var_array, (sizeof(var_array) / sizeof(var_array[0]) {

int x = 0;

for (x = 0; x < var_count; x++) {

  char *inner_var_array[2] = { 0 };

  int inner_var_count;

  if ((inner_var_count =

 
switch_separate_string(var_array[x], '=',

 
inner_var_array, (sizeof(inner_var_array) / sizeof(inner_var_array[0] ==
2) {

 

 
switch_channel_set_variable(originate_status[i].peer_channel,
inner_var_array[0], inner_var_array[1]);

  }

}

  }

}

 

if (!local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

The code block inside if (local_clobber) and if (!local_clobber) does
exactly the same thing. May I know is it by design and how does it actually
work ? I am not sure what does it mean by localClobber so if someone can
spare sometime explaining, I would really appreciate it.

 

Thank you

 

Best Regards

 

Alex To

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Re: [Freeswitch-dev] Need help on switch_ivr_originate(...) in switch_ivr_originate.c

2010-01-26 Thread Alex To 
Oh thank you Mike.

 

I overlook the if (vdata) code block in between if(local_clobber) and if
(!local_clobber). So actually if (!local_clobber) it will override the local
variables by setting the global ones inside the {.}.

 

So it's clear now.

 

Thanks again.

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Tuesday, January 26, 2010 11:27 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Need help on switch_ivr_originate(...) in
switch_ivr_originate.c

 

local_clobber true|false (default false)

whether or not to allow (per-leg) local variables inside [] to take
precedence over originate global variables in {}


{foo=value1,local_clobber=false}sofia/internal/1...@test.com,[foo=value2]sofi
a/internal/1...@test.com

foo will be value1 on both legs

{foo=value1,local_clobber=true}sofia/internal/1...@test.com,[foo=value2]sofia
/internal/1...@test.com


foo will be value1 on all legs except the 101 who set it to value2





On Tue, Jan 26, 2010 at 5:53 AM, Alex To  wrote:

Hi,

 

Would somebody enlighten me on this trunk of code in the mentioned file at
line 2273:

 

if (local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

if (vdata) {

  char *var_array[1024] = { 0 };

  int var_count = 0;

  if ((var_count = switch_separate_string(vdata,
'|', var_array, (sizeof(var_array) / sizeof(var_array[0]) {

int x = 0;

for (x = 0; x < var_count; x++) {

  char *inner_var_array[2] = { 0 };

  int inner_var_count;

  if ((inner_var_count =

 
switch_separate_string(var_array[x], '=',

 
inner_var_array, (sizeof(inner_var_array) / sizeof(inner_var_array[0] ==
2) {

 

 
switch_channel_set_variable(originate_status[i].peer_channel,
inner_var_array[0], inner_var_array[1]);

  }

}

  }

}

 

if (!local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

The code block inside if (local_clobber) and if (!local_clobber) does
exactly the same thing. May I know is it by design and how does it actually
work ? I am not sure what does it mean by localClobber so if someone can
spare sometime explaining, I would really appreciate it.

 

Thank you

 

Best Regards

 

Alex To


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FreeSWITCH http://www.freeswitch.org/
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Re: [Freeswitch-dev] Need help on switch_ivr_originate(...) in switch_ivr_originate.c

2010-01-27 Thread Alex To 
Ignore my previous message. Wanted to say thanks Anthony but I wrote "Mike"
. I think I wrote it in a hurry.

 

Sorry for the mistake and thanks Anthony for your help. :D

 

Regards

 

Alex To

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Tuesday, January 26, 2010 11:27 PM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Need help on switch_ivr_originate(...) in
switch_ivr_originate.c

 

local_clobber true|false (default false)

whether or not to allow (per-leg) local variables inside [] to take
precedence over originate global variables in {}


{foo=value1,local_clobber=false}sofia/internal/1...@test.com,[foo=value2]sofi
a/internal/1...@test.com

foo will be value1 on both legs

{foo=value1,local_clobber=true}sofia/internal/1...@test.com,[foo=value2]sofia
/internal/1...@test.com


foo will be value1 on all legs except the 101 who set it to value2





On Tue, Jan 26, 2010 at 5:53 AM, Alex To  wrote:

Hi,

 

Would somebody enlighten me on this trunk of code in the mentioned file at
line 2273:

 

if (local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

if (vdata) {

  char *var_array[1024] = { 0 };

  int var_count = 0;

  if ((var_count = switch_separate_string(vdata,
'|', var_array, (sizeof(var_array) / sizeof(var_array[0]) {

int x = 0;

for (x = 0; x < var_count; x++) {

  char *inner_var_array[2] = { 0 };

  int inner_var_count;

  if ((inner_var_count =

 
switch_separate_string(var_array[x], '=',

 
inner_var_array, (sizeof(inner_var_array) / sizeof(inner_var_array[0] ==
2) {

 

 
switch_channel_set_variable(originate_status[i].peer_channel,
inner_var_array[0], inner_var_array[1]);

  }

}

  }

}

 

if (!local_clobber) {

  if (var_event) {

switch_event_t *event;

switch_event_header_t *header;

/* install the vars from the {} params
*/

for (header = var_event->headers;
header; header = header->next) {

 
switch_channel_set_variable(originate_status[i].peer_channel, header->name,
header->value);

}

switch_event_create(&event,
SWITCH_EVENT_CHANNEL_ORIGINATE);

switch_assert(event);

 
switch_channel_event_set_data(originate_status[i].peer_channel, event);

switch_event_fire(&event);

  }

}

 

The code block inside if (local_clobber) and if (!local_clobber) does
exactly the same thing. May I know is it by design and how does it actually
work ? I am not sure what does it mean by localClobber so if someone can
spare sometime explaining, I would really appreciate it.

 

Thank you

 

Best Regards

 

Alex To


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Twitter: http://twitter.com/FreeSWITCH_wire

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MSN:anthony_miness...@hotmail.com
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si

[Freeswitch-dev] Question about switch_cond_next()

2010-01-28 Thread Alex To 
Hi, would someone clarify this for me please

 

Is it right to say that switch_cond_next() does only one thing which is to
put the current thread to sleep for a period of time (1 second) ?

 

Is it equivalent to, let's say, Thread.Sleep(xxx); or it also does something
else besides putting the current thead to sleep ? 

 

Is switch_cond_yield the same as switch_cond_next, except that
switch_cond_yield accepts parameter as the input interval ?

 

Thanks

 

Regards

 

Alex To

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Re: [Freeswitch-dev] Question about switch_cond_next()

2010-01-29 Thread Alex To 
Thank you, Anthony

 

Alex

 

From: freeswitch-dev-boun...@lists.freeswitch.org
[mailto:freeswitch-dev-boun...@lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Friday, January 29, 2010 12:33 AM
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] Question about switch_cond_next()

 

cond_next is equiv to cond_yield(1000) or 1 ms
actual time will vary depending on OS and HW



On Thu, Jan 28, 2010 at 8:10 AM, Alex To  wrote:

Hi, would someone clarify this for me please

 

Is it right to say that switch_cond_next() does only one thing which is to
put the current thread to sleep for a period of time (1 second) ?

 

Is it equivalent to, let's say, Thread.Sleep(xxx); or it also does something
else besides putting the current thead to sleep ? 

 

Is switch_cond_yield the same as switch_cond_next, except that
switch_cond_yield accepts parameter as the input interval ?

 

Thanks

 

Regards

 

Alex To


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<mailto:msn%3aanthony_miness...@hotmail.com> 
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<mailto:paypal%3aanthony.miness...@gmail.com> 
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:8...@conference.freeswitch.org
<mailto:sip%3a...@conference.freeswitch.org> 
iax:gu...@conference.freeswitch.org/888
googletalk:conf+...@conference.freeswitch.org
<mailto:googletalk%3aconf%2b...@conference.freeswitch.org> 
pstn:+19193869900

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