[Bug 20799] Multiple games using OpenAL freezes/crashes during the startup

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20799





--- Comment #82 from Raymond <superquad.vortex2 at gmail.com>  2010-06-07 00:33:12 ---
(In reply to comment #69)
> > But wine does not support FULL hardware acceleration ( just emulation only) and
> > Vista does not use dsound any more 
> 
> The winealsa driver supports Basic acceleration (primary buffer is hardware). I
> believe it's a quirk of DSound in real Windows to always say the primary buffer
> is in hardware, even under Emulation.
> 
> Under Vista/7, DSound is still available, but it doesn't support hardware
> acceleration without something like ALchemy and hardware OpenAL drivers.

DSBCAPS Structure

dwPlayCpuOverhead
    The processing overhead as a percentage of main processor cycles needed to
mix this sound buffer. For hardware buffers, this member will be zero because
the mixing is performed by the sound device. For software buffers, this member
depends on the buffer format and the speed of the system processor. 

wine seem did not provide the correct value for dwPlayCpuOverhead

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