[gstreamer-bugs] [Bug 360673] Stuttering with SunAudio Sink

[GStreamer (bugzilla.gnome.org)]

Do not reply to this via email (we are currently unable to handle email
responses and they get discarded).  You can add comments to this bug at
http://bugzilla.gnome.org/show_bug.cgi?id=360673

  GStreamer | gst-plugins-base | Ver: HEAD CVS





------- Comment #15 from Brian Cameron  2006-11-08 16:51 UTC -------

Actually digging into this a bit more, I notice that if I add the thr_yield
function as follows in the audioringbuffer_thread_func ()

      do {
        written = writefunc (sink, readptr + written, left);
        GST_LOG ("transfered %d bytes of %d from segment %d", written, left,
            readseg);
        if (written < 0 || written > left) {
          GST_WARNING ("error writing data (reason: %s), skipping segment\n",
              strerror (errno));
          break;
        }
        left -= written;
      } while (left > 0);

      thr_yield ();

and also force the sunaudiosink to always open non-blocking by commenting out
the if test in the open function like this:


  fd = open (sunaudiosink->device, O_WRONLY | O_NONBLOCK);

  /*
  if (fd >= 0) {
    close (fd);
    fd = open (sunaudiosink->device, O_WRONLY);
  }
  */

That this does make the stuttering less bad.  With these changes it seems that
the audio starts to play consistently, and then after a few seconds it starts
to stutter.  As if this fixes the problem for a few seconds and then it gets
out of sync somehow.

So this thread yielding does seem to be related to the stuttering behavior, but
isn't a complete fix.  But hopefully it points the way to the solution?  Wim?


-- 
Configure bugmail: http://bugzilla.gnome.org/userprefs.cgi?tab=email