[Bug 27901] Reproducible crash (and audio popping) in snd_pcm_area_copy

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=27901

Jörg Höhle <hoehle at users.sourceforge.net> changed:

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--- Comment #7 from Jörg Höhle <hoehle at users.sourceforge.net> 2011-09-23 16:34:39 CDT ---
Bryan, this report is a bit confusing. It looks like the original crash is gone
and the focus since shifted to winmm:wave tests failing.
Please change the subject accordingly.

I'd tend to confirm the test failure
wave.c:794: Test failed: (00) WHDR_DONE WHDR_PREPARED expected, got
WHDR_INQUEUE WHDR_PREPARED

Wine's audio is sadly still somewhat fragile and too much dependent on settings
that happen to work more or less well together, but beware of changing them in
isolation (e.g. 100ms winmm buffer duration w.r.t. ALSA buffer size and timer
callback rate, feeding silence w.r.t. underruns, using IAC_Stop w.r.t.
GetPosition, using dmix or PulseAudio or raw hw:0). This is no good and we're
slowly working on that... Don't hold your breath.

Feel free to submit test results to test.winehq.org

Meanwhile, I bet you get random hangs on the winmm:mci tests.
I've one machine which does that in Ubuntu Intrepid with dmix. No failure with
Pulseaudio, yet the bugs are all Wine's.
In rare cases, the tests pass!

As you already found out, waveOutRestart is involved, beside snd_pcm_drop and
computations of GetPosition, with fluctuations depending on the time the
periodic timers invoke the callbacks w.r.t. activity in other threads and
period size vs. buffer sizes.  Because PulseAudio, dmix and hw:0 use vastly
different buffer sizes, they cause different "effects" in Wine.

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