. moved the MPEG audio decoder to the new bitstream

    I wasn't sure whether the bits counting method was effective to
  skip ancillary data at the end of a frame, but I kept it for
  safety. There is still a lot to optimize in the bit counting, like
  unrolling the first iteration of some loops, but I don't know if
  it would be worth it. The other solution would have been to look for
  a startcode after eache frame, without caring about the ancillary bits.

  . cleaning in the SPU decoder.