Windows choppy / stuttering audio

Hi!

First of all: Thank you very much for your great product!
	I've built a Java softphone using the Jiaxclient wrapper
around iaxclient. 
The phone works perfectly on Linux, but I experience audio
problems on 
windows using your prebuilt binary. The receiving side is
fine (the user of 
the softphone hears the caller lound and clearly) but the
sending part 
introduces stutter. I have tested the softphone using the
windows and linux 
version of the library on the same network (during the
night, so almost no 
network load) using the same asterisk server and the same
dialplan. I have 
tried to use the 'MS soundmapper input' device as well as
the real hardware 
device as the microphone input, that the same problems
arise. Is someone 
using iaxclient on Windows successfully with good audio
quality?

Cheers,
	Florian

-- 
Florian Hackenberger
f.hackenbergerchello.at

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Hi Florian,

On Sun, May 4, 2008 at 5:38 AM, Florian Hackenberger
<f.hackenbergerchello.at> wrote:
>  First of all: Thank you very much for your great
product!

Thank you.

>         I've built a Java softphone using the
Jiaxclient wrapper around iaxclient.
>  The phone works perfectly on Linux, but I experience
audio problems on
>  windows using your prebuilt binary. The receiving side
is fine (the user of
>  the softphone hears the caller lound and clearly) but
the sending part
>  introduces stutter. I have tested the softphone using
the windows and linux
>  version of the library on the same network (during the
night, so almost no
>  network load) using the same asterisk server and the
same dialplan. I have
>  tried to use the 'MS soundmapper input' device as well
as the real hardware
>  device as the microphone input, that the same problems
arise. Is someone
>  using iaxclient on Windows successfully with good
audio quality?

Yes. There are definitely people (me) using iaxclient on
Windows with
good audio quality. I have not looked at jiaxclient, so I do
not know
how it affects the audio pipeline. Hopefully it doesn't
affect the
audio pipeline at all.

What version of iaxclient are you using?

There are some changes in the latest trunk that may help,
but it's
going to be a while before I have enough personal bandwidth
to put
together another iaxclient release with a new pre-built
binary.

Pete

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On Tuesday 06 May 2008, you wrote:
> Yes. There are definitely people (me) using iaxclient
on Windows with
> good audio quality. I have not looked at jiaxclient, so
I do not know
> how it affects the audio pipeline. Hopefully it doesn't
affect the
> audio pipeline at all.
Jiaxclient is simply a wrapper around the public API of
iaxclient. No 
Java is involved concerning the audio.

> What version of iaxclient are you using?
iaxclient 2.0.2 precompiled. We use the default audio host
API on 
windows (don't know which one that is).

> There are some changes in the latest trunk that may
help, but it's
> going to be a while before I have enough personal
bandwidth to put
> together another iaxclient release with a new pre-built
binary.
We are going to recompile the library, if you don't know
what the issue 
could be. Do you have any pointers to documentation about
how to build 
the library on windows (or maybe even cross compile it on
linux)? Is 
contrib/win/vs2005 and README.VisualStudio up to date?

Cheers,
	Florian

-- 
DI Florian Hackenberger
florianhackenberger.at
www.hackenberger.at

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On Tue, May 6, 2008 at 9:24 AM, Florian Hackenberger
<f.hackenbergerchello.at> wrote:
> On Tuesday 06 May 2008, you wrote:
>  > Yes. There are definitely people (me) using
iaxclient on Windows with
>  > good audio quality. I have not looked at
jiaxclient, so I do not know
>  > how it affects the audio pipeline. Hopefully it
doesn't affect the
>  > audio pipeline at all.
>  Jiaxclient is simply a wrapper around the public API
of iaxclient. No
>  Java is involved concerning the audio.

That's good and as I would expect.

>  > What version of iaxclient are you using?
>  iaxclient 2.0.2 precompiled. We use the default audio
host API on
>  windows (don't know which one that is).

Okay, 2.0.2 has proven to be pretty okay on Windows. I
thought you
might have been using one of the 2.1 beta releases.

The default audio API on windows is WMME. In fact, this is
the only
one that iaxclient ever tries to use.

>  > There are some changes in the latest trunk that
may help, but it's
>  > going to be a while before I have enough personal
bandwidth to put
>  > together another iaxclient release with a new
pre-built binary.
>  We are going to recompile the library, if you don't
know what the issue
>  could be. Do you have any pointers to documentation
about how to build
>  the library on windows (or maybe even cross compile it
on linux)? Is
>  contrib/win/vs2005 and README.VisualStudio up to
date?

Yes, the projects in contrib/win/vs2005 are kept up-to-date
as is
README.VisualStudio. The trunk has a yet more up-to-date
README.VisualStudio -- you might peek at that even if you
are building
2.0.2.

You may be able to cross-compile 2.0.2, but the trunk and
2.1 betas
will be unwilling. I suggest using Visual Studio 2005 Pro.

Thanks for your efforts.
Pete

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