lily/include/midi-walker.hh

   1 /*
   2   midi-walker.hh -- declare Midi_walker
   3
   4   (c) 1996,  1997--1999 Han-Wen Nienhuys  <hanwen@cs.uu.nl>
   5                  Jan Nieuwenhuizen <janneke@gnu.org>
   6  */
   7
   8 #ifndef MIDI_WALKER_HH
   9 #define MIDI_WALKER_HH
  10
  11 #include "proto.hh"
  12 #include "pqueue.hh"
  13 #include "lily-proto.hh"
  14 #include "moment.hh"
  15
  16 struct Midi_note_event : PQueue_ent<Moment, Midi_note_off*>
  17 {
  18   bool ignore_b_;
  19   Midi_note_event();
  20 };
  21
  22 int compare (Midi_note_event const& left, Midi_note_event const& right);
  23
  24 /**
  25   walk audio and output midi
  26   */
  27 class Midi_walker
  28 {
  29 public:
  30   Midi_walker (Audio_staff* audio_staff_l, Midi_track* midi_track_l);
  31   ~Midi_walker();
  32
  33   void process();
  34   void operator ++(int);
  35   bool ok () const;
  36 private:
  37   void do_start_note (Midi_note* note_p);
  38   void do_stop_notes (Moment now_mom);
  39   void output_event (Moment now_mom, Midi_item* l);
  40
  41   Midi_track* track_l_;
  42   Audio_staff* staff_l_;
  43   int index_;
  44   Link_array<Audio_item> * item_l_arr_l_;
  45   PQueue<Midi_note_event> stop_note_queue;
  46   Moment last_mom_;
  47 };
  48
  49
  50 #endif // MIDI_WALKER_HH