def hf.step
import emerging-ezaudio@0.4.0.0/src/mp3_dec.bend as Mp3Decimport Base
225def hf.step(st: Nd, +book: U32, +huff: List<&2, U32>) -> Nd:
226 match st:
227 case Nd{+leaf, +bits, +w, +done}:
228 hf.next(U32.is_eq(done, 1) || U32.is_eq((leaf .&. 32768 : U32), 0), leaf, bits, w, book, huff)