Re: [Ekiga-list] PTLIB alsa plugin status

[Damien Sandras <dsandras seconix com>]

Le dimanche 01 mars 2009 à 17:53 +0100, Alec Leamas a écrit :
> Derek Smithies wrote:
> > On Sat, 28 Feb 2009, Alec Leamas wrote:
> >
> >> Derek Smithies wrote:
> >>> Hi,
> >>>
> >>> On Fri, 27 Feb 2009, Alec Leamas wrote:
> >>>> I need a whisky.
> >>> Coffee is much better. Don't add any impurities though (milk, sugar 
> >>> etc)
> >> I'm was actually using both whisky AND coffe w milk. Sorry, no 
> >> offense... :-)
> >>
> >> After some serious fights w the build system, I've been able to add a 
> >> simple PTRACE to the SetBuffers method in sound_alsa.cxx. Trimmed 
> >> output:
> >>
> >> 13:45:49.348      ALSA    Setting buffers, size: 3840, count: 5
> >> 13:45:49.402      ALSA    Device default Opened
> >> 13:45:49.438      ALSA    Setting buffers, size: 320, count: 5
> >
> > It is set in opal in
> >
> > OpalAudioMediaStream::OpalAudioMediaStream(
> >  where soundChannelBuffers is set to the supplied parameter value.
> >
> > This comes out of the pcssendpoint class, which
> >
> > which ends up coming from: a method of the pcss endpoint which gets 
> > the user defined buffer depth...
> >     soundChannelBuffers = pcss endpoint.GetSoundChannelBufferDepth()
> >
> >
> > so you know what ?
> >
> > I think this is a bug from outside of ptlib&opal. The default values 
> > for codec sizes in ptlib&opal are for a count of 2 buffers (unix) and 
> > 3 buffers(windows).
> >
> > Derek.
> >
> Indeed. I have submitted a temporary patch to 
> http://bugzilla.gnome.org/show_bug.cgi?id=572953. Not  tested, but 
> should be better than today. If it not makes other problems 
> visible...Many thanks for your help with his, I  wouldn't really have a 
> chance without it.
> 

This patch will break with some hardware, even on Linux.
-- 
 _     Damien Sandras
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