lily/tie-performer.cc

   1 /*
   2   tie-performer.cc --  implement Tie_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2001 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8  */
   9
  10 #include "command-request.hh"
  11 #include "audio-item.hh"
  12 #include "musical-request.hh"
  13 #include "pqueue.hh"
  14 #include "performer.hh"
  15
  16 struct CNote_melodic_tuple {
  17   Melodic_req *req_l_ ;
  18   Audio_note *note_l_;
  19   Moment end_;
  20   CNote_melodic_tuple ();
  21   CNote_melodic_tuple (Audio_note*, Melodic_req*, Moment);
  22   static int pitch_compare (CNote_melodic_tuple const &, CNote_melodic_tuple const &);
  23   static int time_compare (CNote_melodic_tuple const &, CNote_melodic_tuple const &);
  24 };
  25
  26 inline int compare (CNote_melodic_tuple const &a, CNote_melodic_tuple const &b)
  27 {
  28   return CNote_melodic_tuple::time_compare (a,b);
  29 }
  30
  31
  32 /**
  33    Manufacture ties.  Acknowledge notes, and put them into a
  34    priority queue. If we have a Tie_req, connect the notes that finish
  35    just at this time, and note that start at this time.
  36
  37    TODO: should share code with Tie_engraver ?
  38  */
  39 class Tie_performer : public Performer
  40 {
  41 public:
  42   VIRTUAL_COPY_CONS (Translator);
  43   Tie_performer ();
  44 private:
  45   bool done_;
  46   PQueue<CNote_melodic_tuple> past_notes_pq_;
  47   Tie_req *req_l_;
  48   Array<CNote_melodic_tuple> now_notes_;
  49   Array<CNote_melodic_tuple> stopped_notes_;
  50   Link_array<Audio_tie> tie_p_arr_;
  51
  52 protected:
  53   virtual void initialize ();
  54   virtual void start_translation_timestep ();
  55   virtual void stop_translation_timestep ();
  56   virtual void acknowledge_audio_element (Audio_element_info);
  57   virtual bool try_music (Music*);
  58   virtual void create_audio_elements ();
  59 };
  60
  61
  62 Tie_performer::Tie_performer ()
  63 {
  64   req_l_ = 0;
  65   done_ = false;
  66 }
  67
  68 ADD_THIS_TRANSLATOR (Tie_performer);
  69
  70
  71 #if 0
  72 Tie_performer::Tie_performer ()
  73 {
  74   // URG
  75   // if we don't do this, lily dumps core
  76   // which means that ``initialize'' and
  77   // ``start_translation_timestep'' did not happen?!
  78   initialize ();
  79 }
  80 #endif
  81
  82 void
  83 Tie_performer::initialize ()
  84 {
  85   req_l_ = 0;
  86 }
  87
  88
  89 bool
  90 Tie_performer::try_music (Music *m)
  91 {
  92   if (!req_l_)
  93     {
  94       if (Tie_req * c = dynamic_cast<Tie_req*> (m))
  95         {
  96           req_l_ = c;
  97           return true;
  98         }
  99     }
 100   return false;
 101 }
 102
 103 void
 104 Tie_performer::acknowledge_audio_element (Audio_element_info i)
 105 {
 106   if (Audio_note *nh = dynamic_cast<Audio_note *> (i.elem_l_))
 107     {
 108       Note_req * m = dynamic_cast<Note_req* > (i.req_l_);
 109       if (!m)
 110         return;
 111       now_notes_.push (CNote_melodic_tuple (nh, m, now_mom ()+ m->length_mom ()));
 112     }
 113 }
 114
 115 void
 116 Tie_performer::create_audio_elements ()
 117 {
 118   if (req_l_ && ! done_)
 119     {
 120       Moment now = now_mom ();
 121       Link_array<Audio_note> nharr;
 122
 123       stopped_notes_.clear ();
 124       while (past_notes_pq_.size ()
 125              && past_notes_pq_.front ().end_ == now)
 126         stopped_notes_.push (past_notes_pq_.get ());
 127       done_ = true;
 128       return;
 129     }
 130
 131   if (req_l_)
 132     {
 133       now_notes_.sort (CNote_melodic_tuple::pitch_compare);
 134       stopped_notes_.sort (CNote_melodic_tuple::pitch_compare);
 135       int i=0;
 136       int j=0;
 137       int tie_count=0;
 138       while (i < now_notes_.size () && j < stopped_notes_.size ())
 139         {
 140           int comp
 141             = Pitch::compare (*unsmob_pitch (now_notes_[i].req_l_->get_mus_property ("pitch")),
 142                                       *unsmob_pitch (stopped_notes_[j].req_l_->get_mus_property ("pitch")));
 143
 144           if (comp)
 145             {
 146  (comp < 0) ? i ++ : j++;
 147               continue;
 148             }
 149           else
 150             {
 151               tie_count ++;
 152
 153               /* don't go around recreating ties that were already
 154                  made. Not infallible. Due to reordering in sort (),
 155                  we will make the wrong ties when notenotes are
 156                  added.  */
 157               if (tie_count > tie_p_arr_.size ())
 158                 {
 159                   Audio_tie * p = new Audio_tie;
 160                   p->set_note (LEFT, stopped_notes_[j].note_l_);
 161                   p->set_note (RIGHT, now_notes_[i].note_l_);
 162                   tie_p_arr_.push (p);
 163                       announce_element (Audio_element_info (p, req_l_));
 164                 }
 165               i++;
 166               j++;
 167
 168             }
 169         }
 170
 171       if (!tie_p_arr_.size ())
 172         {
 173           req_l_->origin ()->warning (_ ("No ties were created!"));
 174         }
 175     }
 176 }
 177
 178 void
 179 Tie_performer::stop_translation_timestep ()
 180 {
 181   for (int i=0; i < now_notes_.size (); i++)
 182     {
 183       past_notes_pq_.insert (now_notes_[i]);
 184     }
 185   now_notes_.clear ();
 186
 187   for (int i=0; i<  tie_p_arr_.size (); i++)
 188    {
 189      //play_element (tie_p_arr_[i]);
 190      tie_p_arr_[i]->note_l_drul_[RIGHT]->tie_to (tie_p_arr_[i]->note_l_drul_[LEFT]);
 191    }
 192   tie_p_arr_.clear ();
 193 }
 194
 195 void
 196 Tie_performer::start_translation_timestep ()
 197 {
 198   req_l_ =0;
 199   done_ = false;
 200   Moment now = now_mom ();
 201   while (past_notes_pq_.size () && past_notes_pq_.front ().end_ < now)
 202     past_notes_pq_.delmin ();
 203 }
 204
 205
 206 CNote_melodic_tuple::CNote_melodic_tuple ()
 207 {
 208   note_l_ =0;
 209   req_l_ =0;
 210   end_ = 0;
 211 }
 212
 213 CNote_melodic_tuple::CNote_melodic_tuple (Audio_note *h, Melodic_req*m, Moment mom)
 214 {
 215   note_l_ = h;
 216   req_l_ = m;
 217   end_ = mom;
 218 }
 219
 220 int
 221 CNote_melodic_tuple::pitch_compare (CNote_melodic_tuple const&h1,
 222                                     CNote_melodic_tuple const &h2)
 223 {
 224   SCM p1  = h1.req_l_->get_mus_property ("pitch");
 225   SCM p2  = h2.req_l_->get_mus_property ("pitch");
 226   return Pitch::compare (*unsmob_pitch (p1),
 227                                *unsmob_pitch (p2));
 228 }
 229
 230 int
 231 CNote_melodic_tuple::time_compare (CNote_melodic_tuple const&h1,
 232                                    CNote_melodic_tuple const &h2)
 233 {
 234   return (h1.end_ - h2.end_).main_part_.sign ();
 235 }