[Bug 40581] New: Regression: dsound input recording from microphone lags with 2 seconds delay

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40581

            Bug ID: 40581
           Summary: Regression: dsound input recording from microphone
                    lags with 2 seconds delay
           Product: Wine
           Version: 1.9.9
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-dsound
          Assignee: wine-bugs at winehq.org
          Reporter: iive at yahoo.com
      Distribution: ---

At first the bug was discovered by using steam.exe voice when running the
build-in test.

It's is probably easier to reproduce by using Win32 version of `Audacity`. With
that program you have immediate visual result and you can pick from 3 different
input methods. The default one "MME" and the third one "WASAPI" work without
any noticeable lag.

I got lucky when a person with nick debianuser in freenode irc, managed not
only to reproduce the issue on his hardware, but also to find a version that is
working properly. He even narrow it down to single release: wine-1.7.33 is
working and wine-1.7.34 is buggy.

I did a git bisect to further narrow it down and ended up at:

commit d301254e72f018c3e04272115e20ffc70ffcbc12
Author: Andrew Eikum <aeikum at codeweavers.com>
Date:   Wed Dec 17 09:28:13 2014 -0600
    mmdevapi: More accurately track device position.

Reverting this commit fixes the recording lag, not only in 1.7.34 but also in
1.9.9 .

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