lily/lyric-performer.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--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 "audio-item.hh"
  21 #include "performer.hh"
  22 #include "stream-event.hh"
  23 #include "translator.icc"
  24
  25 class Lyric_performer : public Performer
  26 {
  27 public:
  28   TRANSLATOR_DECLARATIONS (Lyric_performer);
  29 protected:
  30
  31   void stop_translation_timestep ();
  32   void process_music ();
  33   DECLARE_TRANSLATOR_LISTENER (lyric);
  34 private:
  35   vector<Stream_event *> events_;
  36   Audio_text *audio_;
  37 };
  38
  39 Lyric_performer::Lyric_performer ()
  40 {
  41   audio_ = 0;
  42 }
  43
  44 void
  45 Lyric_performer::process_music ()
  46 {
  47   // FIXME: won't work with fancy lyrics
  48   if (events_.size ()
  49       && scm_is_string (events_[0]->get_property ("text"))
  50       && ly_scm2string (events_[0]->get_property ("text")).length ())
  51     {
  52       audio_ = new Audio_text (Audio_text::LYRIC,
  53                                ly_scm2string (events_[0]->get_property ("text")));
  54       Audio_element_info info (audio_, events_[0]);
  55       announce_element (info);
  56     }
  57   events_.clear ();
  58 }
  59
  60 void
  61 Lyric_performer::stop_translation_timestep ()
  62 {
  63   if (audio_)
  64     {
  65       audio_ = 0;
  66     }
  67   events_.clear ();
  68 }
  69
  70 IMPLEMENT_TRANSLATOR_LISTENER (Lyric_performer, lyric);
  71 void
  72 Lyric_performer::listen_lyric (Stream_event *event)
  73 {
  74   events_.push_back (event);
  75 }
  76
  77 ADD_TRANSLATOR (Lyric_performer,
  78                 /* doc */
  79                 "",
  80
  81                 /* create */
  82                 "",
  83
  84                 /* read */
  85                 "",
  86
  87                 /* write */
  88                 ""
  89                 );