[Openh323-user] Sound on x86/linux platform

[Ivan G. <iv...@co...>]

I've been working on a nasty little problem.
I have openH323 working nicely on an embedded
Arm system, and am trying to get it working on
a linux box.  I seem to be getting threading and/or
buffering problems, which lock up the box and cause
jitter.

One thing that helped a lot was to change PSoundChannel::Write
in oss.cxx to the following:

BOOL PSoundChannel::Write(const void * buf, PINDEX len)
{
  if (!Setup())
    return FALSE;

  if (os_handle > 0) {
    while (!ConvertOSError(::write(os_handle, (void *)buf, len)))
      if (GetErrorCode() != Interrupted)
        return FALSE;
    writeDelay.Delay(len/16);//LINE ADDED HERE
    return TRUE;
  }

However, I still get jitter.  It seems to take several
seconds to start, but then is regular and periodic.  Any
ideas/suggestions?

thanks,
Ivan Gevirtz
Director of Technology
CoCo Communications