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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi everyone,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I think I just found a bug (which is easy to avoid if
you use Speex the “standard” way). I’m writing a wrapper-dll
in C# for Speex and it’s up and running. However, I had some problem with
the wrapper (Garbage Collector-related) so I found out that if I created a new
decoder every run, everything worked smoothly. What I also discovered was that
the sound quality was degraded due to this. I investigated and found out that
the same bug/error appears if I write a simple C-program.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>My main program was testenc.c in the speex source
code. What I changed was to remove the decoder initialization in the beginning
of the file and put them in the while()-loop before speex_decoder_int() and put
a speex_decoder_destroy() just after the decode call (and of course, removed
the destroy call at the end of the program).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>If I played the result from the original program, it
was all clear and fine. With my multi decoding init and destroy function calls,
the sound quality was reduced (lower sound output and some noise was added). I
will pursue this bug/error in the morning, just wondered if anyone experienced
this bug/error before or have a clue where to look in the source code.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I have example raw PCM-input and output files if you
are interested in helping me with this bug (or want to hear the difference
between the outputs). I have tried several input files and still the same
result. I also examined the output files in a hex-editor and could see that the
first 100 bytes are the same, but then they start to differ.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Gregor Brunmar</span></font><o:p></o:p></p>
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