[Bug 48230] TES IV: Oblivion MP3 no longer play since wine-staging 4.17

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48230

--- Comment #12 from Zebediah Figura  ---
There is also code that uses mpg123, yes, though I wouldn't describe it as
legacy. It's serving a slightly different purpose (in specific, the ACM and DMO
APIs which unlike DirectShow are much simpler and just ask for raw data to be
fed in and out; DirectShow by contrast is doing a lot more work setting up a
media decoding pipeline which we can largely offload to GStreamer.)

Note also that GStreamer ends up using libmpg123 to decode layer 3 audio anyway
(at least with 1.12 and later since mad was removed) unless using libav
instead.