Extra points if you figure out _where_ it's happening :-) No surprise if
any floating point library call returns diffferent results.
Thanks
Bruce
On 01/10/2013 03:57 PM, Kristoff Bonne wrote:
> Hi all
>
>
> A couple of days ago, I noticed something odd while troubleshooting the
> problem with the audio-dongles stereo/mono I had:
> if I use the codec2 library to decode a codec2 stream, I get slightly
> different result on i386 and on ARM.
>
> I did a simple test: encoded an audiofile from PCM to codec2 on my
> laptop, and then decoded it back to WAV on three different platforms: my
> laptop (i386), a raspberry pi (ARM11) and a pandaboard (ARM cortex A9)
>
> When compairing the resulting WAV-files, I noticed there are a number of
> small difference:
> - the two ARM based files are the same
> - however, that file does differ from the file created by the i386 box.
>
> The difference are very small (perhaps just rounding-errors somewhere)
> but the files are not 100 % equal.
>
> Has anybody seen any simular problems?
>
>
> BTW.
> The compilers on all platforms are the same, with slight differences in
> the last number of the release information;
> i386: gcc versie 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
>
> RPi: gcc version 4.6.3 (Debian 4.6.3-12+rpi1)
> pandaboard: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
>
>
> To do this test, I did start from the exactly the same source-code (the
> latest release on SVN).
>
>
>
> 73
> Kristoff - ON1ARF
>
>
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