Emit not-quite-cross-staff beams in the right context.

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

diff --git a/lily/midi-walker.cc b/lily/midi-walker.cc
index 3214b3202442169c6f5e55c603dfbb46c05b673e..6fbb780a1ba4c05b98ac9af1c2d40ffa825e6835 100644 (file)
--- a/lily/midi-walker.cc
+++ b/lily/midi-walker.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
 
   LilyPond is free software: you can redistribute it and/or modify
@@ -52,15 +52,15 @@ audio_item_less (Audio_item * const a,
   return a->get_column ()->when_ <  b->get_column ()->when_;
 }
 
-Midi_walker::Midi_walker (Audio_staff *audio_staff, Midi_track *track,
-                         int channel)
+Midi_walker::Midi_walker (Audio_staff *audio_staff, Midi_track *track)
 {
-  channel_ = channel;
   track_ = track;
   index_ = 0;
   items_ = audio_staff->audio_items_;
   vector_sort (items_, audio_item_less);
   last_tick_ = 0;
+  percussion_ = audio_staff->percussion_;
+  merge_unisons_ = audio_staff->merge_unisons_;
 }
 
 Midi_walker::~Midi_walker ()
@@ -82,31 +82,43 @@ Midi_walker::do_start_note (Midi_note *note)
 {
   Audio_item *ptr = items_[index_];
   assert (note->audio_ == ptr);
-  int stop_ticks = int (moment_to_real (note->audio_->length_mom_) * Real (384 * 4))
-    + ptr->audio_column_->ticks ();
-
-  bool play_start = true;
+  int now_ticks = ptr->audio_column_->ticks ();
+  int stop_ticks = int (moment_to_real (note->audio_->length_mom_) *
+                        Real (384 * 4)) + now_ticks;
   for (vsize i = 0; i < stop_note_queue.size (); i++)
     {
-      /* if this pith already in queue */
+      /* if this pitch already in queue */
       if (stop_note_queue[i].val->get_semitone_pitch ()
          == note->get_semitone_pitch ())
        {
-         if (stop_note_queue[i].key < stop_ticks)
+         int queued_ticks
+           = stop_note_queue[i].val->audio_->audio_column_->ticks ();
+         // If the two notes started at the same time, or option is set,
+         if (now_ticks == queued_ticks || merge_unisons_)
            {
-             /* let stopnote in queue be ignored,
-                new stop note wins */
-             stop_note_queue[i].ignore_ = true;
-
-             /* don't replay start note, */
-             play_start = false;
+             // merge them.
+             if (stop_note_queue[i].key < stop_ticks)
+               {
+                 Midi_note_event e;
+                 e.val = stop_note_queue[i].val;
+                 e.key = stop_ticks;
+                 stop_note_queue[i].ignore_ = true;
+                 stop_note_queue.insert (e);
+               }
+             note = 0;
              break;
            }
          else
            {
-             /* skip this stopnote,
-                don't play the start note */
-             note = 0;
+             // A note was played that interruped a played note.
+             // Stop the old note, and continue to the greatest moment
+             // between the two.
+             if (stop_note_queue[i].key > stop_ticks)
+               {
+                 stop_ticks = stop_note_queue[i].key;
+               }
+             output_event (now_ticks, stop_note_queue[i].val);
+             stop_note_queue[i].ignore_ = true;
              break;
            }
        }
@@ -118,11 +130,10 @@ Midi_walker::do_start_note (Midi_note *note)
       e.val = new Midi_note_off (note);
 
       midi_events_.push_back (e.val);
-      e.key = int (stop_ticks);
+      e.key = stop_ticks;
       stop_note_queue.insert (e);
 
-      if (play_start)
-       output_event (ptr->audio_column_->ticks (), note);
+      output_event (now_ticks, note);
     }
 }
 
@@ -171,9 +182,6 @@ Midi_walker::process ()
 
   if (Midi_item *midi = get_midi (audio))
     {
-      if (Midi_channel_item *mci = dynamic_cast<Midi_channel_item*> (midi))
-       mci->channel_ = channel_;
-      
       if (Midi_note *note = dynamic_cast<Midi_note *> (midi))
        {
          if (note->audio_->length_mom_.to_bool ())
@@ -188,6 +196,11 @@ Midi_item*
 Midi_walker::get_midi (Audio_item *i)
 {
   Midi_item *mi = Midi_item::get_midi (i);
+
+  if (percussion_)
+    if (Midi_channel_item *mci = dynamic_cast<Midi_channel_item*> (mi))
+      mci->channel_ = 9;
+
   midi_events_.push_back (mi);
   return mi;
 }