Honey, I shrunk the MP3 decoder

A few months ago, I implemented a minuscule MPEG Audio Layer II decoder. While I still consider this as a cool hack, it’s not of too much use nowadays. Everyone uses MP3 or Vorbis; MPEG Audio Layer II is only used together with MPEG Video (think VCD, SVCD and DVB), but you usually don’t have MP2 audio files on your disk. So the aim was clear: I wanted to have an as-small-as-possible MP3 decoder, too.
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