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Re: [Linphone-developers] Linphone and G.722 Wideband codec

From: Simon Brenner
Subject: Re: [Linphone-developers] Linphone and G.722 Wideband codec
Date: Thu, 08 Jul 2010 16:50:55 +0200
User-agent: Thunderbird (X11/20091015)

I just created a separate repository for developing a G.722 linphone plugin.
Have a look at

It doesn't run yet but I hope to get it right with your help! You can configure 
and compile it the
usual way:

make install (as root)

Or directly download a tar.gz:

I think there's not much left to do but don't know what yet... The plugin is 
already loaded at
linphone startup but isn't shown in the codec list...


Simon Brenner wrote:
> Wait a minute, I think we also have do differentiate between this as a 
> buit-in codec or a plugin
> codec, haven't we?
> If we have it as a plugin it has to be compiled as a kind of own project 
> which results in a .so / .a
> library being copied / installed to a possible Linphone plugin folder.
> If we have it as a built-in codec there are all those steps to be done that 
> you've already named.
> So what do we have?
> -Simon.
> menno wrote:
>> Hello Everyone,
>> I can't compile it succesfully. I add the c files to the
>> mediastreamer2/src/ , but after configure he don't compile the
>> all the g722 C files (dont transform them to "lo" & "o" files.
>> Is there anybody who can exactly describe the steps what i should doing to
>> add this codec to linphone? The steps of mine didn't work yet succesfully
>> :(.
>>> I'm attaching my version of mediastreamer2/plugins/msg722.c
>>> There is two IMPORTANT things to remmeber about g722
>>> 1) when building ding SDP the fmt should be G722/8000
>>> 2) The actual sampling rate should be 16000HZ  but the RTP timestamp
>> should be based 8000HZ
>>> Thanks
>>> Vadim
>>> On 06/29/2010 01:24 PM, Simon Brenner wrote:
>>>>> The files from the code from the internet are not directly very
>> useful, because you should make some config&make files.
>>>> Yeah, that's right!
>>>>> Is there anybody who has allready made a G722 plugin (the sama as msilbc
>>>>> plugin) for Linphone (so that i can compile that first and give some
>> parameters to the linphone configuration to use them)?
>>>> I'm actually in the middle of writing a Linphone plugin, but this is
>> for other reasons. For a start,
>>>> I took the msx264 plugin code and replaced it by my own code preserving
>> the needed structure. But I
>>>> better had had a kind of template or decent guide to do that.
>>>> Perhaps we can ask Simon Morlat how his approach to writing a plugin
>> is?? Simon, do you have some
>>>> kind of plugin template?
>>>> -Simon.
>>>>>> Well, as I said, I never got the codec actually running.
>>>>>> You seem to have done the same steps as I did in order to integrate that
>>>>>> particular piece of code
>>>>>> from the internet. So I'm not further than you.
>>>>>> But the thing with doing it as a plugin seems very clever to me! I like
>>>>>> the idea of a plugin being
>>>>>> generally independent from the main program.
>>>>>> Before saying any more I'll also have to have a look at some already
>> existent plugins in order to
>>>>>> understand how they work.
>>>>>> -Simon.
>>>>>> menno wrote:
>>>>>>> Hi!
>>>>>>> Nice to hear!
>>>>>>> Can you explain the steps that you do to get this G722 working (to get
>>>>>>> this in the codec section)? I'll try that first on a normal
>> i386/i686 PC
>>>>>>> and after that i will try to recompile it to an ARM device.
>>>>>>>> Hi!
>>>>>>>> Yeah, that was exactly was I was trying to do 2 months ago
>>>>>>>> (coincidentally
>>>>>>>> also on an ARM device). I
>>>>>>>> also got everything to compile and if I remember it correctly I
>> even got
>>>>>>>> G.722 to be standing in the
>>>>>>>> audio codec list.
>>>>>>>> But I unfortunately never got the codec really running which I
>> don't understand...
>>>>>>>> I would also definitely be interested in having G.722 integrated in
>> Linphone - even if it would be
>>>>>>>> with the help of a preprocessor switch or something. (Like
>>>>>>>> USE_G722_CODEC)
>>>>>>>> -Simon.
>>>>>>>> menno wrote:
>>>>>>>>> Hello,
>>>>>>>>> I want to use the G.722 codec on a 1.2Ghz ARM Device in the
>> future. For
>>>>>>>>> now i want to use linphone incombination with the Wideband G.722
>> codec.
>>>>>>>>> I follow the following steps:
>>>>>>>>> 1. I download all the G722 files @
>> 2. I unpack the files and put msg722.c, g722_encode.c and
>>>>>>>>> g722_decode.c
>>>>>>>>> into mediastreamer2/src
>>>>>>>>> 3. I put the g722.h file into the
>>>>>>>>> mediastreamer2/include/mediastreamer2
>>>>>>>>> directory
>>>>>>>>> 4. I added two new filter id's to allfilters.h
>>>>>>>>> 5. I add all the C-files to the mediastreamer2/src/ 6.
>> I add
>>>>>>>>> "linphone_core_assign_payload_type(&payload_type_g7221,9,NULL);"
>>>>>>>>> Compiling works ok with the current version linphone-3.3.1.tar.gz.
>> But
>>>>>>>>> after compiling , and starting program i get no other codecs than the
>>>>>>>>> g711A/U,GSM and not the G722 one.
>>>>>>>>> Can anybody help me to get this G722 wideband codec working (or
>> add this
>>>>>>>>> to the current linphone)?

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