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I am writing a game that is a bit depending on the soundtrack so I want to read mp3 file and use it’s data (like the speed of music, beat and stuff). Is there any class (preferably) I could use or article that would cover everything about mp3 reading (from checking if it’s an mp3 to actual decoding)? It’s OK if I have to do different calculations to find the rhythm and stuff, I just wanna decode file as I don’t know the algorithm (and don’t know if it’s complicated or not).
Yes, its complicated. MP3s are the typical lossy DCT compression scheme more or less. The process is similar to JPEG.
Writing an mp3 decoder and encoder is a project in itself.
Encode
Quantize -> DCT Transform -> Entropy Encode -> Store
Decode
Entropy Decode -> IDCT -> Dequantize -> play
I suggest FMOD its widely accepted and used in the gaming community.