lily/drum-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 "translator.icc"
  26 #include "warn.hh"
  27
  28 class Drum_note_performer : public Performer
  29 {
  30 public:
  31   TRANSLATOR_DECLARATIONS (Drum_note_performer);
  32
  33 protected:
  34   void stop_translation_timestep ();
  35   void process_music ();
  36   DECLARE_TRANSLATOR_LISTENER (note);
  37 private:
  38   vector<Stream_event *> note_evs_;
  39 };
  40
  41 Drum_note_performer::Drum_note_performer ()
  42 {
  43 }
  44
  45 void
  46 Drum_note_performer::process_music ()
  47 {
  48   SCM tab = get_property ("drumPitchTable");
  49
  50   while (note_evs_.size ())
  51     {
  52       Stream_event *n = note_evs_.back ();
  53       note_evs_.pop_back ();
  54       SCM sym = n->get_property ("drum-type");
  55       SCM defn = SCM_EOL;
  56
  57       if (scm_is_symbol (sym)
  58           && (scm_hash_table_p (tab) == SCM_BOOL_T))
  59         defn = scm_hashq_ref (tab, sym, SCM_EOL);
  60
  61       if (Pitch *pit = unsmob_pitch (defn))
  62         {
  63           SCM articulations = n->get_property ("articulations");
  64           Stream_event *tie_event = 0;
  65           for (SCM s = articulations;
  66                !tie_event && scm_is_pair (s);
  67                s = scm_cdr (s))
  68             {
  69               Stream_event *ev = unsmob_stream_event (scm_car (s));
  70               if (!ev)
  71                 continue;
  72
  73               if (ev->in_event_class ("tie-event"))
  74                 tie_event = ev;
  75             }
  76
  77           Moment len = get_event_length (n, now_mom ());
  78
  79           Audio_note *p = new Audio_note (*pit, len,
  80                                           tie_event, Pitch (0, 0, 0));
  81           Audio_element_info info (p, n);
  82           announce_element (info);
  83         }
  84     }
  85
  86   note_evs_.clear ();
  87 }
  88
  89 void
  90 Drum_note_performer::stop_translation_timestep ()
  91 {
  92   note_evs_.clear ();
  93 }
  94
  95 IMPLEMENT_TRANSLATOR_LISTENER (Drum_note_performer, note);
  96 void
  97 Drum_note_performer::listen_note (Stream_event *ev)
  98 {
  99   note_evs_.push_back (ev);
 100 }
 101
 102 ADD_TRANSLATOR (Drum_note_performer,
 103                 /* doc */
 104                 "Play drum notes.",
 105
 106                 /* create */
 107                 "",
 108
 109                 /* read */
 110                 "",
 111
 112                 /* write */
 113                 ""
 114                 );