I want to play an mp3 file. Is it possible to write a code from scratch?

so i'm trying to play an MP3 file on an LPC1768 uController. I have written a neat software to play wav file. I want to know if it's possible to decode mp3 on the go on LPC1768? If so, could you point me in the right direction. I have knowledge of DSP and encoders/decoder but i'm having issue with decoding mp3 format on PC at least. Please point me in the right direction.