[FFmpeg-devel] WMA regression still broken / decouple regression rules

Benjamin Larsson banan
Tue Sep 2 14:10:03 CEST 2008

Robert Swain wrote:
> 2008/9/2 Robert Swain <robert.swain at gmail.com>:
>> 2008/9/2 Michael Niedermayer <michaelni at gmx.at>:
>>> On Mon, Sep 01, 2008 at 10:11:14PM -0700, Mike Melanson wrote:
>>>> Hi,
>>>> For most of the x86_32 FATE configurations, (all except icc and gcc
>>>> 2.95.3), the FFmpeg regressions are breaking on the WMA test. It was
>>>> last working on 14980:
>>>>   http://svn.mplayerhq.hu/ffmpeg?view=rev&revision=14980
>>>> And it was either 14981 (voroshil) or 14982 (aurel) that broke it:
>>>>   http://svn.mplayerhq.hu/ffmpeg?view=rev&revision=14981
>>>>   http://svn.mplayerhq.hu/ffmpeg?view=rev&revision=14982
>>>> This seems to invert the breakage (previously, icc and gcc 2.95.3 were
>>>> broken on WMA, and I think the x86_64 configs were, as well).
>>> When where ALL the regression tests last working on ALL configurations (not
>>> counting buggy compilers)?
>> I think they stopped all working when I switched the window init code
>> in wma.c to use ff_sine_window_init(). This worked fine on most x86_32
>> but not on ICC or GCC 2.95.3. And I think it was broken (regressions
>> failed for some wma test) on x86_64 as well. The diff to the
>> regressions that was applied to fix this seems to have inverted the
>> situation.
> Oh sorry, it wasn't a diff to the regressions, it was the addition of
> the intermediate variable 'alpha'.
> Rob

Regressions test on float code shouldn't use a md5sum it is bound to be 
different depending on platform. Instead of trying to patch up a test 
that worked by luck in one configuration we should work out a generic 
way to test float codecs.

Benjamin Larsson

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