Quoting Jaroslav Kysela:
[...]
> >
> > v = *src;
> > if (cmpxchg(hw, 0, 1) == 0)
> > v -= *sw;
> > xadd(sw, v);
> > do {
> > v = *sw;
> > if (v > 0x7fff)
> > s = 0x7fff;
> > else if (v < -0x8000)
> > s = -0x8000;
> > else
> > s = v;
>
> A bit correction (we have to avoid zero results in hw buffer):
>
> else if (v == 0)
> s = 1;
> else
> s = v;
>
Why?! It's like I've written yesterday : even if the outcoming sample
is zero, we can still treat the hw buffer as cleared. It makes no
difference whether it was reset by the driver or the samples just
added up to zero. If we have zero in the hw not because of a reset
we must also have 0 in sw, so the clearing code will have no effect.
--------------
Fycio (J.Sobierski)
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