lily/piano-pedal-performer.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2000--2012 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
  22 #include "audio-item.hh"
  23 #include "international.hh"
  24 #include "stream-event.hh"
  25 #include "warn.hh"
  26
  27 #include "translator.icc"
  28
  29 enum Pedal_type {SOSTENUTO, SUSTAIN, UNA_CORDA, NUM_PEDAL_TYPES};
  30
  31 /**
  32    perform Piano pedals
  33 */
  34 class Piano_pedal_performer : public Performer
  35 {
  36   struct Pedal_info
  37   {
  38     Stream_event *start_event_;
  39     Drul_array<Stream_event *> event_drul_;
  40   };
  41
  42 public:
  43   TRANSLATOR_DECLARATIONS (Piano_pedal_performer);
  44
  45 protected:
  46   virtual void initialize ();
  47   static const char *pedal_type_str (int t);
  48   void process_music ();
  49   void stop_translation_timestep ();
  50   void start_translation_timestep ();
  51   DECLARE_TRANSLATOR_LISTENER (sustain);
  52   DECLARE_TRANSLATOR_LISTENER (una_corda);
  53   DECLARE_TRANSLATOR_LISTENER (sostenuto);
  54 private:
  55   vector<Audio_piano_pedal *> audios_;
  56   Pedal_info info_alist_[NUM_PEDAL_TYPES];
  57 };
  58
  59 Piano_pedal_performer::Piano_pedal_performer ()
  60 {
  61 }
  62
  63 const char *
  64 Piano_pedal_performer::pedal_type_str (int t)
  65 {
  66   switch (t)
  67     {
  68     case SOSTENUTO:
  69       return "Sostenuto";
  70     case SUSTAIN:
  71       return "Sustain";
  72     case UNA_CORDA:
  73       return "UnaCorda";
  74     default:
  75       programming_error ("Unknown pedal type");
  76       return 0;
  77     }
  78 }
  79
  80 void
  81 Piano_pedal_performer::initialize ()
  82 {
  83   Pedal_info *p = info_alist_;
  84
  85   for (int i = 0; i < NUM_PEDAL_TYPES; i++, p++)
  86     {
  87       p->event_drul_[START] = 0;
  88       p->event_drul_[STOP] = 0;
  89       p->start_event_ = 0;
  90     }
  91 }
  92
  93 void
  94 Piano_pedal_performer::process_music ()
  95 {
  96   Pedal_info *p = info_alist_;
  97
  98   for (int i = 0; i < NUM_PEDAL_TYPES; i++, p++)
  99     {
 100       string pedal_type = pedal_type_str (i);
 101       if (p->event_drul_[STOP])
 102         {
 103           if (!p->start_event_)
 104             p->event_drul_[STOP]->origin ()->warning (_f ("cannot find start of piano pedal: `%s'", pedal_type));
 105           else
 106             {
 107               Audio_piano_pedal *a = new Audio_piano_pedal;
 108               a->type_string_ = pedal_type;
 109               a->dir_ = STOP;
 110               audios_.push_back (a);
 111               Audio_element_info info (a, p->event_drul_[STOP]);
 112               announce_element (info);
 113             }
 114           p->start_event_ = 0;
 115         }
 116
 117       if (p->event_drul_[START])
 118         {
 119           p->start_event_ = p->event_drul_[START];
 120           Audio_piano_pedal *a = new Audio_piano_pedal;
 121           a->type_string_ = pedal_type;
 122           a->dir_ = START;
 123           audios_.push_back (a);
 124           Audio_element_info info (a, p->event_drul_[START]);
 125           announce_element (info);
 126         }
 127       p->event_drul_[START] = 0;
 128       p->event_drul_[STOP] = 0;
 129     }
 130 }
 131
 132 void
 133 Piano_pedal_performer::stop_translation_timestep ()
 134 {
 135   audios_.clear ();
 136 }
 137
 138 void
 139 Piano_pedal_performer::start_translation_timestep ()
 140 {
 141   Pedal_info *p = info_alist_;
 142   for (int i = 0; i < NUM_PEDAL_TYPES; i++, p++)
 143     {
 144       p->event_drul_[STOP] = 0;
 145       p->event_drul_[START] = 0;
 146     }
 147 }
 148
 149 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_performer, sostenuto);
 150 void
 151 Piano_pedal_performer::listen_sostenuto (Stream_event *r)
 152 {
 153   Direction d = to_dir (r->get_property ("span-direction"));
 154   info_alist_[SOSTENUTO].event_drul_[d] = r;
 155 }
 156
 157 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_performer, sustain);
 158 void
 159 Piano_pedal_performer::listen_sustain (Stream_event *r)
 160 {
 161   Direction d = to_dir (r->get_property ("span-direction"));
 162   info_alist_[SUSTAIN].event_drul_[d] = r;
 163 }
 164
 165 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_performer, una_corda);
 166 void
 167 Piano_pedal_performer::listen_una_corda (Stream_event *r)
 168 {
 169   Direction d = to_dir (r->get_property ("span-direction"));
 170   info_alist_[UNA_CORDA].event_drul_[d] = r;
 171 }
 172
 173 ADD_TRANSLATOR (Piano_pedal_performer,
 174                 /* doc */
 175                 "",
 176
 177                 /* create */
 178                 "",
 179
 180                 /* read */
 181                 "",
 182
 183                 /* write */
 184                 ""
 185                );