lily/note-performer.cc

   1 /*
   2   note-performer.cc -- implement Note_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2008 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 "stream-event.hh"
  14 #include "warn.hh"
  15
  16 #include "translator.icc"
  17
  18 class Note_performer : public Performer
  19 {
  20 public:
  21   TRANSLATOR_DECLARATIONS (Note_performer);
  22
  23 protected:
  24   void stop_translation_timestep ();
  25   void process_music ();
  26
  27   DECLARE_TRANSLATOR_LISTENER (note);
  28 private:
  29   vector<Stream_event*> note_evs_;
  30   vector<Audio_note*> notes_;
  31
  32
  33   vector<Audio_note*> last_notes_;
  34   Moment last_start_;
  35
  36 };
  37
  38 void
  39 Note_performer::process_music ()
  40 {
  41   if (!note_evs_.size ())
  42     return;
  43
  44   Pitch transposing;
  45   SCM prop = get_property ("instrumentTransposition");
  46   if (unsmob_pitch (prop))
  47     transposing = *unsmob_pitch (prop);
  48
  49   for (vsize i = 0; i < note_evs_.size (); i ++)
  50     {
  51       Stream_event *n = note_evs_[i];
  52       SCM pit = n->get_property ("pitch");
  53
  54       if (Pitch *pitp = unsmob_pitch (pit))
  55         {
  56           SCM articulations = n->get_property ("articulations");
  57           Stream_event *tie_event = 0;
  58           for (SCM s = articulations;
  59                !tie_event && scm_is_pair (s);
  60                s = scm_cdr (s))
  61             {
  62               Stream_event *ev = unsmob_stream_event (scm_car (s));
  63               if (!ev)
  64                 continue;
  65
  66               if (ev->in_event_class ("tie-event"))
  67                 tie_event = ev;
  68             }
  69
  70           Moment len = get_event_length (n, now_mom ());
  71
  72           Audio_note *p = new Audio_note (*pitp, len,
  73                                           tie_event, transposing.negated ());
  74           Audio_element_info info (p, n);
  75           announce_element (info);
  76           notes_.push_back (p);
  77
  78           /*
  79             shorten previous note.
  80            */
  81           if (now_mom ().grace_part_)
  82             {
  83               if (last_start_.grace_part_ == Rational (0))
  84                 {
  85                   for (vsize i = 0; i < last_notes_.size (); i++)
  86                     last_notes_[i]->length_mom_ += Moment (0,
  87                                                            now_mom().grace_part_);
  88                 }
  89             }
  90         }
  91     }
  92 }
  93
  94 void
  95 Note_performer::stop_translation_timestep ()
  96 {
  97   if (note_evs_.size ())
  98     {
  99       last_notes_ = notes_;
 100       last_start_ = now_mom ();
 101     }
 102
 103   notes_.clear ();
 104   note_evs_.clear ();
 105 }
 106
 107 IMPLEMENT_TRANSLATOR_LISTENER (Note_performer, note)
 108 void
 109 Note_performer::listen_note (Stream_event *ev)
 110 {
 111   note_evs_.push_back (ev);
 112 }
 113
 114 ADD_TRANSLATOR (Note_performer,
 115                 /* doc */
 116                 "",
 117
 118                 /* create */
 119                 "",
 120
 121                 /* read */
 122                 "",
 123
 124                 /* write */
 125                 ""
 126                 );
 127
 128 Note_performer::Note_performer ()
 129 {
 130 }