[FFmpeg-devel] fate/hap : add test for hap encoding

James Cowgill jcowgill at debian.org
Tue Apr 24 16:56:54 EEST 2018

On 23/04/18 10:11, Carl Eugen Hoyos wrote:
> 2018-03-14 7:31 GMT+01:00, Martin Vignali <martin.vignali at gmail.com>:
>> In that case we can let the test using "none"
>> compression (bypass the snappy part)
> These tests are also broken, please fix or
> remove them:
> https://buildd.debian.org/status/fetch.php?pkg=ffmpeg&arch=i386&ver=7%3A4.0-1&stamp=1524444218&raw=0
> ("Error 1")

I've had a brief look at this error (and a similar error on s390x) and
it looks like a float rounding issue in some of the functions in
libavc/texturedspenc.c. The output from the hap encoder is only
different by a few bits.

i386 fails because it promotes floats to long double when evaluating (at
least on Debian which has SSE disabled), and s390x fails because it
promotes floats to doubles. I think they're the only architectures which
promote floats (although some have not built yet).

I'll probably just ignore these tests for now since I'm not sure what
the best solution is.


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