[Bug 28723] Sound stutter in Rage when emulated windows version is set to "Windows 7" (XAudio2 -> mmdevapi sound output path)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=28723

--- Comment #40 from Alexey Loukianov <mooroon2 at mail.ru> 2011-11-10 21:30:26 CST ---
Note: something obviously wrong either with the patch or with the way DSound
uses mmdevapi. With my patchset in place everything if OK when playing RAGE
with XA2->mmdevapi sound render patch but I can hear some underruns when
playing using XA2->DSound->mmdevapi render patch (i.e. applying patchset fixes
problems for Win7 mode but leads to xruns with DSound in WinXP mode). I suspect
this might be due to DSound->mmdevapi wrapper seems to be using
IAudioClock_GetPosition to get current playing position, and currently returned
value is bogus - it relies on GetCurrentPadding which is wrong. Would try to
re-implement IAudioClock_GetPosition using snd_pcm_delay() and check if it
would fix underruns with dsound renderpath.

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