void mad_decoder_init(struct mad_decoder *, void *,
enum mad_flow (*)(void *, struct mad_stream *),
enum mad_flow (*)(void *, struct mad_header const *),
enum mad_flow (*)(void *, struct mad_stream const *,
struct mad_frame *),
enum mad_flow (*)(void *, struct mad_header const *,
struct mad_pcm *),
enum mad_flow (*)(void *, struct mad_stream *,
struct mad_frame *),
enum mad_flow (*)(void *, void *, unsigned int *));
함수의 원형부분소스입니다.