It's most likely deeply tied into Win32, WASAPI and similar stuff, so even if you had the code, you'd have to rewrite most of it
I really do miss the android version, and hope they update and bring it back.
They went back to the 2.x codebase to release 2.92 and 2.95 before skipping Winamp 4 and jumping to Winamp 5 (2 + 3) which was based on Winamp 2 but with the Wasabi skinning system bolted on.
Also, the Android version was great imho.