release: 1.5.19

[lilypond.git] / lily / note-performer.cc

diff --git a/lily/note-performer.cc b/lily/note-performer.cc
index 12c8601da3a3e23c85363e67d3a3fb17f0ad0780..a7d2907daeddb2e70b60030612f75a13c2a65abd 100644 (file)
--- a/lily/note-performer.cc
+++ b/lily/note-performer.cc
@@ -3,60 +3,130 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1996,  1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1996--2001 Jan Nieuwenhuizen <janneke@gnu.org>
  */
 
-#include "note-performer.hh"
+#include "performer.hh"
 #include "musical-request.hh"
 #include "audio-item.hh"
+#include "audio-column.hh"
+#include "global-translator.hh"
 #include "debug.hh"
 
-IMPLEMENT_IS_TYPE_B1 (Note_performer,Performer);
-ADD_THIS_TRANSLATOR (Note_performer);
+/**
+Convert reqs to audio notes.
+*/
+class Note_performer : public Performer {
+public:
+  TRANSLATOR_DECLARATIONS(Note_performer);
+  
+protected:
+  virtual bool try_music (Music *req_l) ;
 
-Note_performer::Note_performer ()
-{
-  note_req_l_ = 0;
-}
+  virtual void stop_translation_timestep ();
+  virtual void create_audio_elements ();
+  Global_translator* global_translator_l ();
+
+private:
+  Array<Note_req*> note_req_l_arr_;
+  Array<Audio_note*> note_p_arr_;
+  Array<Audio_note*> delayed_p_arr_;
+};
 
 void 
-Note_performer::do_print () const
+Note_performer::create_audio_elements ()
 {
-#ifndef NPRINT
-  if (note_req_l_) 
-      note_req_l_->print ();
-#endif
+  if (note_req_l_arr_.size ())
+    {
+      int transposing_i = 0;
+      //urg
+      SCM prop = get_property ("transposing");
+      if (gh_number_p (prop)) 
+       transposing_i = gh_scm2int (prop);
+
+      while (note_req_l_arr_.size ())
+       {
+         Note_req* n = note_req_l_arr_.pop ();
+         Pitch pit =  * unsmob_pitch (n->get_mus_property ("pitch"));
+         Audio_note* p = new Audio_note (pit,  n->length_mom (), transposing_i);
+         Audio_element_info info (p, n);
+         announce_element (info);
+         note_p_arr_.push (p);
+       }
+      note_req_l_arr_.clear ();
+    }
 }
 
-void 
-Note_performer::do_process_requests () 
+Global_translator*
+Note_performer::global_translator_l ()
 {
-  // this is _really_ braindead, but it generates some output
-  if (!note_req_l_ || !note_req_l_->access_Melodic_req ()  || !note_req_l_->access_Rhythmic_req ())
-    return;
+  Translator *t = this;
+  Global_translator *global_l =0;
+  do
+    {
+      t = t->daddy_trans_l_ ;
+      global_l = dynamic_cast<Global_translator*> (t);
+    }
+  while (!global_l);
 
-  int transposing_i = 0;
-  //urg
-  Scalar prop = get_property ("transposing");
-  if (!prop.empty_b () && prop.isnum_b ()) 
-    transposing_i = prop;
+  return global_l;
+}
 
 
-  play (new Audio_note (note_req_l_, transposing_i));
+void
+Note_performer::stop_translation_timestep ()
+{
 
-  note_req_l_ = 0;
-}
+  // why don't grace notes show up here?
+  // --> grace notes effectively do not get delayed
+  Global_translator* global_l = global_translator_l ();
+  for (int i=0; i < note_p_arr_.size (); i++)
+    {
+      Audio_note* n = note_p_arr_[i];
+      Moment m= n->delayed_until_mom_;
+      if (m.to_bool ())
+       {
+         global_l->add_moment_to_process (m);
+         delayed_p_arr_.push (n);
+         note_p_arr_[i] = 0;
+         note_p_arr_.del (i);
+         i--;
+       }
+    }
 
-bool 
-Note_performer::do_try_request (Request* req_l)
+  Moment now = now_mom ();
+  for (int i=0; i < note_p_arr_.size (); i++)
+    {
+      play_element (note_p_arr_[i]);
+    }
+  note_p_arr_.clear ();
+  note_req_l_arr_.clear ();
+  for (int i=0; i < delayed_p_arr_.size (); i++)
+    {
+      Audio_note* n = delayed_p_arr_[i];
+      if (n->delayed_until_mom_ <= now)
+       {
+         play_element (n);
+         delayed_p_arr_[i] = 0;
+         delayed_p_arr_.del (i);
+         i--;
+       }
+    }
+}
+ 
+bool
+Note_performer::try_music (Music* req_l)
 {
-  if (note_req_l_)
-    return false;
-  
-  if (!req_l->access_Musical_req () || !req_l->access_Musical_req ()->access_Note_req ())
-    return false;
+  if (Note_req *nr = dynamic_cast <Note_req *> (req_l))
+    {
+      note_req_l_arr_.push (nr);
+      return true;
+    }
+  return false;
+}
 
-  note_req_l_ = req_l->access_Musical_req ()->access_Melodic_req ();
+ENTER_DESCRIPTION(Note_performer,"","","","","");
 
-  return true;
+Note_performer::Note_performer()
+{
 }