lily/drum-note-performer.cc

   1 /*
   2   note-performer.cc -- implement Drum_note_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2006 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "performer.hh"
  10 #include "audio-item.hh"
  11 #include "audio-column.hh"
  12 #include "global-context.hh"
  13 #include "music.hh"
  14 #include "pitch.hh"
  15 #include "stream-event.hh"
  16 #include "translator.icc"
  17 #include "warn.hh"
  18
  19 class Drum_note_performer : public Performer
  20 {
  21 public:
  22   TRANSLATOR_DECLARATIONS (Drum_note_performer);
  23
  24 protected:
  25   void stop_translation_timestep ();
  26   void process_music ();
  27   DECLARE_TRANSLATOR_LISTENER (note);
  28 private:
  29   vector<Stream_event*> note_evs_;
  30   vector<Audio_note*> notes_;
  31 };
  32
  33 Drum_note_performer::Drum_note_performer ()
  34 {
  35 }
  36
  37 void
  38 Drum_note_performer::process_music ()
  39 {
  40   SCM tab = get_property ("drumPitchTable");
  41
  42   while (note_evs_.size ())
  43     {
  44       Stream_event *n = note_evs_.back ();
  45       note_evs_.pop_back ();
  46       SCM sym = n->get_property ("drum-type");
  47       SCM defn = SCM_EOL;
  48
  49       if (scm_is_symbol (sym)
  50           && (scm_hash_table_p (tab) == SCM_BOOL_T))
  51         defn = scm_hashq_ref (tab, sym, SCM_EOL);
  52
  53       if (Pitch *pit = unsmob_pitch (defn))
  54         {
  55           SCM articulations = n->get_property ("articulations");
  56           Music *tie_event = 0;
  57           for (SCM s = articulations;
  58                !tie_event && scm_is_pair (s);
  59                s = scm_cdr (s))
  60             {
  61               Music *m = unsmob_music (scm_car (s));
  62               if (!m)
  63                 continue;
  64
  65               if (m->is_mus_type ("tie-event"))
  66                 tie_event = m;
  67             }
  68
  69           Audio_note *p = new Audio_note (*pit, get_event_length (n),
  70                                           tie_event, 0);
  71           Audio_element_info info (p, n);
  72           announce_element (info);
  73           notes_.push_back (p);
  74         }
  75     }
  76
  77   note_evs_.clear ();
  78 }
  79
  80 void
  81 Drum_note_performer::stop_translation_timestep ()
  82 {
  83   notes_.clear ();
  84   note_evs_.clear ();
  85 }
  86
  87 IMPLEMENT_TRANSLATOR_LISTENER (Drum_note_performer, note);
  88 void
  89 Drum_note_performer::listen_note (Stream_event *ev)
  90 {
  91   note_evs_.push_back (ev);
  92 }
  93
  94 ADD_TRANSLATOR (Drum_note_performer,
  95                 "Play drum notes.", "",
  96                 "note-event", "", "");