Instead of including the IDLs directly, define a local IDL that #includes them,
with XAUDIO2_VER defined, and include that generated header.
Get rid of compat.c, and use XAUDIO2_VER to modify the code in the other source
files.
Build the tests for both xaudio2_7 and xaudio2_8 using PARENTSRC, and use
XAUDIO2_VER to select between them. This mirrors the approach taken for
d3dcompiler, and makes it easier to test more xaudio2 versions in the future.
In versions 2.8 and later, no coclasses are provided by the API, so we
should version the old ones to make it clear they're out of date.
Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
