@spec new() :: t()

Returns a structure holding a clear state of the access unit splitter.

@spec split([Membrane.H26x.NALu.t()], boolean(), t()) ::
  {[Membrane.H26x.AUSplitter.access_unit()], t()}

Splits the given list of NAL units into the access units.

It can be used for a stream which is not completely available at the time of function invocation, as the function updates the state of the access unit splitter - the function can be invoked once more, with new NAL units and the updated state. Under the hood, split/2 defines a finite state machine with two states: :first and :second. The state :first describes the state before reaching the first segment of a coded picture NALu of a given access unit. The state :second describes the state after processing the first segment of the coded picture of a given access unit.