[Bug 14717] resampled sound is horrible
wine-bugs at winehq.org
wine-bugs at winehq.org
Tue Mar 22 21:08:20 CDT 2011
http://bugs.winehq.org/show_bug.cgi?id=14717
--- Comment #162 from Raymond <superquad.vortex2 at gmail.com> 2011-03-22 21:08:20 CDT ---
(In reply to comment #90)
> (In reply to comment #87)
> > it is meaningless to test those emulated sound card sb16 and ac97 in kvm or
> > virtualbox.
>
> I would agree if the emulated sound card used the driver specifically written
> for it (i.e., something analogous to the VMware video driver). However, the
> emulated card pretends to be a real thing, identical to something manufactured
> in real-world silicon, and uses the drivers meant to be used with the
> real-silicon cards (i.e., the drivers that come with Windows itself). So these
> drivers would send identical output to the emulated and real-world cards and
> thus are suitable for reverse-engineering the resampler, provided that kvm
> itself does no resampling (that's why QEMU_AUDIO_DAC_FIXED_SETTINGS=0).
>
if you look at winealsa.drv/waveinit.c
wwo.outcaps.wMid = MM_CREATIVE;
wwo.outcaps.wPid = MM_CREATIVE_SBP16_WAVEOUT;
wwo.outcaps.vDriverVersion = 0x0100;
wwi.incaps.wMid = MM_CREATIVE;
wwi.incaps.wPid = MM_CREATIVE_SBP16_WAVEOUT;
wwi.incaps.vDriverVersion = 0x0100;
it is emulating SB 16 waveout and wavein for all alsa sound cards
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