[Bug 21609] Multiple games loose most sound effects or crash

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21609





--- Comment #23 from Brandon Bergren <wine at bdragon.rtk0.net>  2010-03-28 00:10:53 ---
Created an attachment (id=27074)
 --> (http://bugs.winehq.org/attachment.cgi?id=27074)
Workaround

Here's a workaround.

The problem here I reckon is all the dwFileSize stuff should really be specific
to FOURCC_DOS, as other IOProcs may not necessarily use wm->info.adwInfo[0] to
hold a file handle. I guess it was working before because Oblivion just
happened to store a HANDLE there. Tightening up on the file size probing in
c62cf2e049ad37d9561957c47d23fc7ba13adc90 broke it because it now expects an
HFILE.

The dwFileSize stuff (and the problematic test) was added in
090629242bfd88d56195ca599817726356b3da09.

For reference, Oblivion's IOProc has a fourcc of 'W','A','V',' ', is registered
/ unregistered on the fly whenever a sound is played, and the proc itself seems
to return 0 for MMIOM_SEEK (but DOES seem to set lDiskOffset correctly, at
least for SEEK_SET and SEEK_CUR. I was unable to test SEEK_END.) Maybe when
fixing the SEEK_END case of mmioSeek to work correctly for IOProcs installed by
programs, it would be a good idea to attempt to detect a bogus return value and
switch to using lDiskOffset? (I note that the
pre-090629242bfd88d56195ca599817726356b3da09 code had an assert to detect this
situation...)

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