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Re: [pygame] Pygame Mixer Crackle noise not an SDL_Mixer problem



so then all we'd need is a script that can test for crackling audio output :)

On Wed, Apr 23, 2008 at 6:26 PM, René Dudfield <renesd@xxxxxxxxx> wrote:
This would be a good script to add to pygame for the google testing
project by Nicholas...

test_between_revisions.py r990 r1175 run_tests.py

Then it could to a bisect build, and test between the revisions.  It
could take a file name to run between revisions.  So you could pass it
a file to run tests for you.

eg. for this bug it could be:
test_between_revisions.py r990 r1175 tests/manual/music.py

It would download, and build them all, then run the tests.


cu,


On Thu, Apr 24, 2008 at 11:13 AM, Brian Fisher
<brian@xxxxxxxxxxxxxxxxxxx> wrote:
> sweet, you rock. with 185 revisions between, then it only takes 8 more
> get-build-test cycles to narrow it down to a single change :)
>
>
>
> On Wed, Apr 23, 2008 at 4:22 PM, Lenard Lindstrom <len-l@xxxxxxxxx> wrote:
>
> > I have been going through SVN. I have narrowed the problem to between
> revisions 990 (1.0.0 rc 0) and 1175 (1.8.0release). SDL may be involved only
> indirectly. Simple C programs using it don't have the problem. It could be
> Pygame doing something it shouldn't. Of course Pygame could be exposing an
> SDL problem that has remained dormant until now.
> >
> > Lenard
> >
> >
> > Brian Fisher wrote:
> >
> > >
> > > Your test demonstrates that 1.8 changes are required to cause the
> problem, but clearly SDL is involved, otherwise why would waveout solve the
> problem as well? If possible, a test of pygame 1.8 against the 1.7 SDL
> versions could still help solve the case.
> > >
> > > maybe in order to figure out what pygame 1.8 change made the crackling
> start happen, you could binary search against svn revisions? i.e. if pygame
> 1.8 was rev. 1200 and 1.7 was rev 600 (made up numbers) then try rev. 900?
> > >
> > >
> > > On Wed, Apr 23, 2008 at 8:42 AM, Lenard Lindstrom <len-l@xxxxxxxxx
> <mailto:len-l@xxxxxxxxx>> wrote:
> > >
> > >    I have narrowed the problem some. It has something to do with
> > >    Pygame 1.8, not
> > >    SDL. I built Pygame 1.7 and linked against the 1.8 prebuilts. The
> > >    crackling
> > >    went away. I don't know if anyone else thought to move the 1.8
> > >    dependencies to
> > >    1.7. And it definitely involves the SDL DirectX audio driver.
> > >    Changes to that
> > >    driver improved sound quality for 1.8, though it did not
> > >    completely eliminate
> > >    the noise. I fear it is another memory access problem. Let's hope
> > >    it was
> > >    introduced with Pygame 1.8. That should be easier to track down.
> > >
> > >    Lenard
> > >
> > >
> > >
> >
> >
>
>