Speex dev - Aug 2010 - Purpose of skip_group_delay variable in testen.c

Hi,

Being relatively new to speex code I have a question regarding the use (and
necessity) of the variable skip_group_delay
found in the testen.c file, namely in writing to fout :

     fwrite(&out_short[skip_group_delay], sizeof(short),
FRAME_SIZE-skip_group_delay, fout);

the variable skip_group_delay is effectively used once then set to zero for
all subsequent uses. What is its purpose other than shortening
the first output frame by skip_group_delay, and is this once off
calculation necessary ? This seems to be a predicted value from what I can
tell.

Regards, Mike
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