[Bug 28644] Uru launcher using up CPU and RAM on startup

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=28644

--- Comment #1 from Andrew Eikum <aeikum at codeweavers.com> 2011-10-11 09:57:52 CDT ---
Created attachment 36814
  --> http://bugs.winehq.org/attachment.cgi?id=36814
(NEEDS WORK) dsound: Don't claim to support hardware buffers

Thanks for the very nice bug report.

This also happens on my system. For some reason, the app is continually
creating new buffers with IDirectSound8::CreateSoundBuffer(). The buffers are
requested with DSBCAPS_LOCHARDWARE. If I detect that flag and return an error
code, then the app releases all buffers and quits out of dsound entirely. Maybe
they're trying to probe exactly how many hardware buffers can be created?

The reason this didn't fail with the ALSA dsound driver is because that driver
just returned E_NOTIMPL for hardware buffers, which triggered the quit from
dsound as I described.

Unfortunately, I can't get the actual game to launch ("Failed to launch client
program"), so I can't see how it behaves when actually playing audio.

I've attached a rough patch here which restores the ALSA dsound driver behavior
(returning E_NOTIMPL), which also matches the behavior of my Windows 7 VM after
a brief test. This should stop the CPU & RAM hogging. If you're capable of
testing the actual application, can you tell me if this seems to fix sound
entirely?

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