Re: [Linphone-users] Re: Does mediastreamer ilbc work for anyone on Linux amd64?

[Simon Morlat]

Ok thanks to the logs I could understand what happened. It 's a problem
with ilbc modes.
The plugin is configured to use the 20ms mode and does not signal it
properly to the remote side, which is sending back 30ms mode packets
while linphone is expecting 20ms mode...
However the remote does not specify which mode it wishes to receive.
The rfc http://www.rfc-editor.org/rfc/rfc3952.txt does not say what to
do in this case.
There will surely be plenty of interoperability problems with iLBC
"thanks" to this stupid RFC.

I suggest that you edit ilbc.c in msilbc plugin to make the following
changes in order to force the use of the 30 ms mode:

static void enc_init(MSFilter *f){
        EncState *s=ms_new(EncState,1);
-       s->nsamples=BLOCKL_20MS;
+       s->nsamples=BLOCKL_30MS;
-       s->nbytes=NO_OF_BYTES_20MS;
+       s->nbytes=NO_OF_BYTES_30MS;
-       s->ms_per_frame=20;
+       s->ms_per_frame=30;
        s->ptime=0;
        s->ts=0;
        ms_bufferizer_init(&s->bufferizer);
        f->data=s;
}

In any case this problem is not related to 64 bit at all.
It is an interoperability problem with some particular servers/phones,
due to an mis-specified RFC.

Simon

Le jeudi 28 janvier 2010 à 06:42 +0800, Felix Lechner a écrit :
> Hi Simon,
> 
> The problem still exists with the new version.  The log is attached.
> It was produced with 'linphone-3 --verbose >& linphone-ubuntu.log'.
> 
> I modified the configure.ac of msilbc-2.0.1 to reflect the
> dependencies on theora and SDL.  For theora I used version 1.0.  My
> version is 1.0final.  The karmic repository has 1.0-2.1build1.  For
> SDL I used 1.2.13.  That is my version and the one in karmic.  The
> linphone README mentions SDL version 1.2.10 as a dependency.  Perhaps
> you wish to adjust my number downward.  The patch was produced with
> 'diff -rup configure.ac-old configure.ac > configure.ac-patch'.
> 
> For further inquiry I attempted to clone the git repository with 'git
> clone git://git.savannah.nongnu.org/linphone.git', but I think there
> was a problem.  For example, the mediastreamer2 directory is empty.
> There is also no configure script.  The savanna browser shows 'Invalid
> commit reference: 6373022261b4a529400a0c0e1661b4d3e5ebc7c5' when I
> click on mediastreamer2 in the tree.  Would you please be able to
> point me in the right direction?
> 
> Best regards,
> Felix
> 
> 
> On Thu, Jan 28, 2010 at 12:11 AM, Simon Morlat
> <address@hidden> wrote:
> > Hi Felix,
> >
> > I just tried with the msilbc version in the current git tree, and it
> > worked.
> > I don't know maybe something has been fixed in git (previously svn) tree
> > since last ilbc snapshot published on the download page.
> > I uploaded a new ilbc plugin so that you can check it works or not:
> >
> > http://download.savannah.gnu.org/releases-noredirect/linphone/plugins/sources/msilbc-2.0.1.tar.gz
> >
> > I have a core duo 64 bit xeon processor on my laptop, and my debian
> > flavour is amd64.
> > I used the following command line to test, I could hear my voice.
> > ./mediastreamer2/tests/mediastream --local 8000 --remote 127.0.0.1:8000
> > --payload 112
> > Maybe the problem only produces when using within linphone, but I don't
> > think so.
> > Just tell me, I'm interested in debugging this story.
> > In case it still does not work, please send a log (linphone-3
> > --verbose).
> >
> > Simon
> >
> >
> > Le mardi 26 janvier 2010 à 06:50 +0800, Felix Lechner a écrit :
> >> I can confirm this problem.  ILBC allows only receiving audio but no
> >> transmitting of my own voice.  I compiled msilbc-2.0.0.tar.gz from the
> >> savannah website using the instructions in the package.
> >>
> >> My linphone version is 3.1.2-2ubuntu2 from the Canonical repository.
> >> Ubuntu disabled the ILBC codec due to licensing issues.  My system is
> >> Ubuntu karmic x86_64.  I also have the Medibuntu archives enabled and
> >> installed the non-free libopal version 3.6.4-1 from
> >> http://snapshots.ekiga.net/snapshots/debian, but do not think that
> >> plays into the problem.  My version of libavcodec52 is
> >> 4:0.5+svn20090706-2ubuntu3.
> >>
> >> After installing the development versions of several libraries (to get
> >> their pkg-config files) the configure scripts for ilbc-rfc3951 and
> >> msilbc-2.0.0 completed without problems.  After compiling each, I ran
> >> "sudo make install".
> >>
> >> In a first attempt, I used --prefix=/usr/local to keep the plugins
> >> outside my apt-managed installation.  I set a link from
> >> /usr/local/lib/libmsilbc.0 to /usr/lib when "linphonec -d 6"
> >> complained about a library-not-found error.  I made calls from my
> >> Gizmo5/sipphone account, but my audio did not transmit even though I
> >> could hear the called party.  Everything worked fine when the ILBC
> >> codec was disabled.
> >>
> >> In a second attempt I used --prefix=/usr, as suggested in the source
> >> module, since that is the linphone location on Ubuntu.  The symptoms
> >> were the same.
> >>
> >> I should also point out that, for both prefix locations, I manually
> >> changed the permissions of include/ilbc as well as lib/mediastreamer
> >> and lib/mediastreamer/plugins to go+rx.  My experience with linphone
> >> is limited, but from browsing the debug messages the program seemed to
> >> load okay.
> >>
> >> I did not call any echo servers like the previous poster.
> >>
> >> Is anybody using the ILBC codec?  Any hints on how to successfully
> >> compile ILBC for linphone would be much appreciated.
> >>
> >> Sincerely
> >> Felix Lechner
> >>
> >>
> >> buport wrote on Sun, 8 Nov 2009 15:35:00 -0500:
> >>
> >> Hi, I'm using Linphone built for 64-bit Linux with the mediastreamer ilbc
> >> plugin. Everything seemed to compile correctly, and I can select ILBC in 
> >> the
> >> codecs list. But when I try calling echo test servers with only the ILBC 
> >> codec
> >> enabled, I hear weird whistling noises and static instead of my voice 
> >> echoed
> >> back to me. (And when I use ILBC with Gizmo5, I don't seem to transmit any
> >> sound at all, even though I can hear the other side just fine.) If a 
> >> choose a
> >> different codec, then I can hear myself when I call echo servers, and SIP 
> >> calls
> >> seem to work just correctly.
> >>
> >> Can anyone else confirm that they have ILBC working successfully on 64-bit
> >> Linux? And any suggestions for how to debug or fix my problem? Thanks!
> >>
> >>
> >> _______________________________________________
> >> Linphone-users mailing list
> >> address@hidden
> >> http://lists.nongnu.org/mailman/listinfo/linphone-users
> >
> >
> >