Proposal: Add support to decode .ogg music files #222
Description
So in stable version if you try to run any osu! Song with music extension which is not .mp3 it will give you an error: "Expected mp3, got something else. Aborting mp3 time calculation. GOT: "song.ogg""
Some old maps use .ogg music files, like this one.
Also, I should mention that .ogg files are approved as ranking criteria: ppy/osu-wiki#3686, so there is a high chance to have this error occurring.
My proposal is to add support of decoding .ogg files too in calculateMP3Time function (Could be renamed to calculateMusicTime then).