2003 -> 2004

[lilypond.git] / lily / midi-walker.cc

diff --git a/lily/midi-walker.cc b/lily/midi-walker.cc
index c0afd12f1504ba410e6cf03ca740e6825956481c..b0a67ca6f9190b3b1a5d91801400a4af59f40403 100644 (file)
--- a/lily/midi-walker.cc
+++ b/lily/midi-walker.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
          Jan Nieuwenhuizen <janneke@gnu.org>
  */
 
@@ -13,9 +13,9 @@
 #include "audio-staff.hh"
 #include "midi-item.hh"
 #include "midi-stream.hh"
-#include "debug.hh"
+#include "warn.hh"
 
-Midi_note_event::Midi_note_event() 
+Midi_note_event::Midi_note_event () 
 { 
   ignore_b_ = false;
 }
@@ -23,51 +23,76 @@ Midi_note_event::Midi_note_event()
 int
 compare (Midi_note_event const& left, Midi_note_event const& right)
 {
-  return sign (left.key - right.key);
+  Moment m =   (left.key - right.key);
+
+  if (m<0)
+    return -1;
+  else if (m > 0)
+    return 1;
+  else
+    return 0;
 }
 
-Midi_walker::Midi_walker (Audio_staff* audio_staff_l, Midi_track* track_l)
+Midi_walker::Midi_walker (Audio_staff* audio_staff, Midi_track* track)
 {
-  track_l_ = track_l;
+  track_ = track;
   index_= 0;
-  item_l_arr_l_ = &audio_staff_l->audio_item_l_arr_;
+  items_ = &audio_staff->audio_items_;
+
   last_mom_ = 0;
 }
 
-Midi_walker::~Midi_walker()
+Midi_walker::~Midi_walker ()
 { 
   // ugh
-  do_stop_notes (last_mom_ + Moment (10, 1));
+  do_stop_notes (last_mom_ + Moment (Rational (10, 1)));
 }
 
 /**
   Find out if start_note event is needed, and do it if needed.
  */
 void 
-Midi_walker::do_start_note (Midi_note* note_p)
+Midi_walker::do_start_note (Midi_note* note)
 {
-  Audio_item* ptr = (*item_l_arr_l_)[index_];
-  Moment stop_mom = note_p->length_mom () + ptr->audio_column_l_->at_mom ();
-  for (int i=0; i < stop_note_queue.size(); i++) 
+  Audio_item* ptr = (*items_)[index_];
+  Moment stop_mom = note->get_length () + ptr->audio_column_->at_mom ();
+
+  bool play_start = true;
+  for (int i=0; i < stop_note_queue.size (); i++) 
     {
-      if (stop_note_queue[i].val->pitch_i() == note_p->pitch_i ()) 
+      /* if this pith already in queue */
+      if (stop_note_queue[i].val->get_pitch () == note->get_pitch ()) 
        {
          if (stop_note_queue[i].key < stop_mom)
-           stop_note_queue[i].ignore_b_ = true;
-         else {
-           // skip the stopnote
-           delete note_p;
-           return;
+           {
+             /* let stopnote in queue be ignored,
+              new stop note wins */
+             stop_note_queue[i].ignore_b_ = true;
+             /* don't replay start note, */
+             play_start = false;
+             break;
+           }
+         else
+           {
+             /* skip this stopnote,
+                don't play the start note */
+             delete note;
+             note = 0;
+             break;
          }
        }
     }
 
-  Midi_note_event e;
-  e.val = new Midi_note_off (note_p);
-  e.key = stop_mom;
-  stop_note_queue.insert (e);
-  
-  output_event (ptr->audio_column_l_->at_mom (), note_p);
+  if (note)
+    {
+      Midi_note_event e;
+      e.val = new Midi_note_off (note);
+      e.key = stop_mom;
+      stop_note_queue.insert (e);
+
+      if (play_start)
+       output_event (ptr->audio_column_->at_mom (), note);
+    }
 }
 
 /**
@@ -76,9 +101,9 @@ Midi_walker::do_start_note (Midi_note* note_p)
 void
 Midi_walker::do_stop_notes (Moment max_mom)
 {
-  while (stop_note_queue.size() && stop_note_queue.front ().key <= max_mom) 
+  while (stop_note_queue.size () && stop_note_queue.front ().key <= max_mom) 
     {
-      Midi_note_event e = stop_note_queue.get();
+      Midi_note_event e = stop_note_queue.get ();
       if (e.ignore_b_)
        {
          delete e.val;
@@ -86,9 +111,9 @@ Midi_walker::do_stop_notes (Moment max_mom)
        }
       
       Moment stop_mom = e.key;
-      Midi_note_off* note_p = e.val;
+      Midi_note* note = e.val;
        
-      output_event (stop_mom, note_p);
+      output_event (stop_mom, note);
     }
 }
 
@@ -99,42 +124,50 @@ void
 Midi_walker::output_event (Moment now_mom, Midi_item* l)
 {
   Moment delta_t = now_mom - last_mom_ ;
-  last_mom_ += delta_t;
-  track_l_->add (delta_t, l);
+  last_mom_ = now_mom;
+
+  /*
+    this is not correct, but at least it doesn't crash when you
+    start with graces
+   */
+  if (delta_t < Moment(0))
+    {
+      delta_t = Moment (0);
+    }
+
+  
+  track_->add (delta_t, l);
 }
 
 void
-Midi_walker::process()
+Midi_walker::process ()
 {
-  Audio_item* audio_p = (*item_l_arr_l_)[index_];
-  do_stop_notes (audio_p->audio_column_l_->at_mom ());
+  Audio_item* audio = (*items_)[index_];
+  do_stop_notes (audio->audio_column_->at_mom ());
 
-  /*
-    THIS IS A MEMORY LEAK. FIXME.
-   */
-  //Midi_item* p = ptr->midi_item_p ();
-  if (Midi_item* midi_p = Midi_item::midi_p (audio_p))
+  if (Midi_item* midi = Midi_item::get_midi (audio))
     {
-      midi_p->channel_i_ = track_l_->number_i_;
-      if (Midi_note* note_p = dynamic_cast<Midi_note*>(midi_p))
+      midi->channel_ = track_->channel_;
+      //midi->channel_ = track_->number_;
+      if (Midi_note* note = dynamic_cast<Midi_note*> (midi))
        {
-         if (note_p->length_mom ())
-           do_start_note (note_p);
+         if (note->get_length ().to_bool ())
+           do_start_note (note);
        }
       else
-       output_event (audio_p->audio_column_l_->at_mom (), midi_p);
+       output_event (audio->audio_column_->at_mom (), midi);
     }
 }
 
 bool
 Midi_walker::ok () const
 {
-  return index_ <item_l_arr_l_->size ();
+  return index_ <items_->size ();
 }
 
 void
-Midi_walker::operator ++(int)
+Midi_walker::operator ++ (int)
 {
-  assert (ok());
+  assert (ok ());
   index_++;
 }