[Speex-dev] Fixed point bug in 1.1.6

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Wed Sep 29 23:34:08 PDT 2004


This definitely needs to be investigated. Unfortunately, I have very little time
at the moment, so it would help a lot if you (or someone else here) were able
to trace the problem a bit further.


Selon Tomasz Pyra <hellfire at ivo.pl>:

> Please compare samples:
> http://www.ivo.pl/ivo2/sound/krwawa_org.wav
> http://www.ivo.pl/ivo2/sound/krwawa_fixed.wav
> http://www.ivo.pl/ivo2/sound/krwawa_float.wav
> krwawa_org.wav is original file.
> Both output files was created using same program by compressing from wav
> to speex, then decompressing from speex to wav (using speex_encode_int
> and speex_decode_int).
> Only difference was used speex library.
> krwawa_fixed.wav was created by libspeex compiled with defined FIXED_POINT
> krwawa_float.wav was created without FIXED_POINT.
> When samples values do not exceed (-32000;32000) eveything is ok.
> Testing platform was Pocket PC, with ARM cpu, libspeex compiled in MsEVC++4.
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