lily/note-performer.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1996--2011 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "performer.hh"
  21 #include "audio-item.hh"
  22 #include "audio-column.hh"
  23 #include "global-context.hh"
  24 #include "stream-event.hh"
  25 #include "warn.hh"
  26
  27 #include "translator.icc"
  28
  29 class Note_performer : public Performer
  30 {
  31 public:
  32   TRANSLATOR_DECLARATIONS (Note_performer);
  33
  34 protected:
  35   void stop_translation_timestep ();
  36   void process_music ();
  37
  38   DECLARE_TRANSLATOR_LISTENER (note);
  39 private:
  40   vector<Stream_event*> note_evs_;
  41   vector<Audio_note*> notes_;
  42
  43
  44   vector<Audio_note*> last_notes_;
  45   Moment last_start_;
  46
  47 };
  48
  49 void
  50 Note_performer::process_music ()
  51 {
  52   if (!note_evs_.size ())
  53     return;
  54
  55   Pitch transposing;
  56   SCM prop = get_property ("instrumentTransposition");
  57   if (unsmob_pitch (prop))
  58     transposing = *unsmob_pitch (prop);
  59
  60   for (vsize i = 0; i < note_evs_.size (); i ++)
  61     {
  62       Stream_event *n = note_evs_[i];
  63       SCM pit = n->get_property ("pitch");
  64
  65       if (Pitch *pitp = unsmob_pitch (pit))
  66         {
  67           SCM articulations = n->get_property ("articulations");
  68           Stream_event *tie_event = 0;
  69           for (SCM s = articulations;
  70                !tie_event && scm_is_pair (s);
  71                s = scm_cdr (s))
  72             {
  73               Stream_event *ev = unsmob_stream_event (scm_car (s));
  74               if (!ev)
  75                 continue;
  76
  77               if (ev->in_event_class ("tie-event"))
  78                 tie_event = ev;
  79             }
  80
  81           Moment len = get_event_length (n, now_mom ());
  82
  83           Audio_note *p = new Audio_note (*pitp, len,
  84                                           tie_event, transposing.negated ());
  85           Audio_element_info info (p, n);
  86           announce_element (info);
  87           notes_.push_back (p);
  88
  89           /*
  90             shorten previous note.
  91            */
  92           if (now_mom ().grace_part_)
  93             {
  94               if (last_start_.grace_part_ == Rational (0))
  95                 {
  96                   for (vsize i = 0; i < last_notes_.size (); i++)
  97                     last_notes_[i]->length_mom_ += Moment (0,
  98                                                            now_mom().grace_part_);
  99                 }
 100             }
 101         }
 102     }
 103 }
 104
 105 void
 106 Note_performer::stop_translation_timestep ()
 107 {
 108   if (note_evs_.size ())
 109     {
 110       last_notes_ = notes_;
 111       last_start_ = now_mom ();
 112     }
 113
 114   notes_.clear ();
 115   note_evs_.clear ();
 116 }
 117
 118 IMPLEMENT_TRANSLATOR_LISTENER (Note_performer, note)
 119 void
 120 Note_performer::listen_note (Stream_event *ev)
 121 {
 122   note_evs_.push_back (ev);
 123 }
 124
 125 ADD_TRANSLATOR (Note_performer,
 126                 /* doc */
 127                 "",
 128
 129                 /* create */
 130                 "",
 131
 132                 /* read */
 133                 "",
 134
 135                 /* write */
 136                 ""
 137                 );
 138
 139 Note_performer::Note_performer ()
 140 {
 141 }