hdr/midiwalker.hh

   1 /*
   2   midiwalker.hh -- declare Midi_walker
   3
   4   (c) 1996,97 Han-Wen Nienhuys, Jan Nieuwenhuizen <jan@digicash.com>
   5   */
   6
   7 #ifndef MIDIWALKER_HH
   8 #define MIDIWALKER_HH
   9
  10 #include "proto.hh"
  11 #include "grouping.hh"
  12 #include "staffwalker.hh"
  13 #include "pcursor.hh"
  14 #include "pqueue.hh"
  15
  16
  17 /**
  18   a simple walker which collects midi stuff, and then outputs.
  19
  20   Should derive from Staff_walker
  21   */
  22 class Midi_walker : public PCursor<Staff_column*> {
  23     Midi_track *track_l_;
  24     PQueue<Melodic_req*, Moment> stop_notes;
  25     Moment last_moment_;
  26
  27     /* *************** */
  28     void do_stop_notes(Moment);
  29
  30     void output_event(Midi_item&, Moment);
  31 public:
  32
  33     Midi_walker(Staff*, Midi_track*);
  34     void process_requests();
  35     ~Midi_walker();
  36 };
  37
  38
  39 #endif // MIDIWALKER_HH
  40
  41