winealsa: improve sound quality for IDsDriverImpl

[Jerry Jenkins]

Robert Reif wrote:

> I just cut the parts out of a bigger patch and I guess I missed something.
> The memory clearing part is the 8 bit hardware buffer bug fix.  The
locking
> is to fix the SetFormat bug.
>
> The problem is that when the hardware primary buffer format changes
> which causes a new buffer to be mmapped, the mixer thread continues
> to use the old deleted buffer address.  The timer callback gets the
> resource shared which doesn't prevent the primary buffer from changing
> it's address even with the new locking I tried to add.  It's overkill to
> have the timer callback get the resource exclusive every time because
> format changes almost never happen and the extra locking is only needed
> when they do.
>

Do you mean that the problem occurs only when we change the format? If this
bug will cause continuing interval or click noise which I have encountered,
your patch is going to be a big help for me. I am really looking forward to
having your patch now :-). But take your time; I'll wait until you finish
it.