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Re: [Discuss-gnuradio] problem with audio extraction in NTSC
From: |
Berndt Josef Wulf |
Subject: |
Re: [Discuss-gnuradio] problem with audio extraction in NTSC |
Date: |
Fri, 18 Feb 2005 09:28:07 +1030 |
User-agent: |
KMail/1.7.2 |
On Fri, 18 Feb 2005 04:57 am, Eric Blossom wrote:
> On Thu, Feb 17, 2005 at 05:37:47AM +0000, address@hidden wrote:
> > > Great. I don't know anything about this package. It would however be
> > > great it it worked with wxPython. I'd hate to give up the cross
> > > platform portability.
> >
> > The package appears to be written mostly in Fortran. I'm not sure
> > how cross platform that makes it. Also, a quick test that I did
> > using dummy data (just plotting an array) was burning about 30% CPU
> > on my P4 2.4 at 10 frames per second. I'll see if I can improve
> > this but initial results could look better... If this doesn't work
> > out what other avenues should we consider? What was the issue with
> > the old Qt versions?
>
> Qt is *not* free for either OS/X or Windows.
> As far as I know there is not a well developed set of bindings for use
> from Python.
This is not true. I've QT3 installed on both, WinXP and NetBSD. QT is
available under various licenses. For non-commercial use you can use the
non-commercial QT Edition.
The QT edition installed on my WinXP system shipped with the book that I
purchased a little while ago:
Bruce Perens' Open Source Series
C++ GUI Programming with QT3
Jasmin Blanchette, Mark Summerfield
Prentice Hall
ISBN 0-13-324072-2
It comes with a CD containing a non-commercial version of QT3 for
Unix/Linux/MacOS and Windows.
Python provides modules for QT3 bindings. I've since created my own version of
wxgui using the pyqt package just for fun. And yes, I like QT3 and hence my
opinions on this subject are biased... :-)
> The only real problem with wxPython as far as I can tell is the
> plotting speed. We should keep our attention on this one problem and
> not jump ship.
I believe that GnuRadio and GUI development are two totally different issues
and should be dealt with accordingly. Python provides the needed cross
platform compatibility, GUI development is a matter for application
developers. I've recreated a couple of the GUI applications using QT3. I'm
sure that there are many other GUI package that are more and less suitable
for this purpose.
Having said this, I like to encourage the GnuRadio project in continuing their
efforts in providing example designs using python and wxWindows to
demonstrate the functionality and application of GnuRadio.
> First off we should determine *where* it's slow. Is it the python code,
> or is it the c++ stuff? There are at least two tools available to us:
> oprofile and the python profiler. If it's in the python, again, let's
> measure. If it's related to the use of numeric for some of the
> processing, we can easily move that into the C++ part of gnu radio.
>
> Worst case, we recode the wxgui/plot.py class into C++. This should
> be pretty much of a mechanical translation. I seriously doubt that
> the underlying wxWidgets line drawing code has any performance
> problem.
>
> Again, start with performance measurements, then go from there.
cheerio Berndt
--
Every man who says frankly and fully what he thinks is doing a public service.
[Leslie Stephen]
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, (continued)
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Chuck Swiger, 2005/02/15
- Message not available
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Achilleas Anastasopoulos, 2005/02/16
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Matt Ettus, 2005/02/16
- [Discuss-gnuradio] Scope and Spectrum Analyzer using WCK, Thomas Traber, 2005/02/16
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, David Carr, 2005/02/16
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Eric Blossom, 2005/02/17
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, David Carr, 2005/02/17
- Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Berndt Josef Wulf, 2005/02/17
Re: Re: [Discuss-gnuradio] problem with audio extraction in NTSC, Eric Blossom, 2005/02/17