Map voices to channels in MIDI output.

[lilypond.git] / lily / audio-item.cc

diff --git a/lily/audio-item.cc b/lily/audio-item.cc
index da4bc4ff6e37b543f6132b3e0fc87dd4504353e4..8459aa8c54547dd9e54d7497f744121156f9acaa 100644 (file)
--- a/lily/audio-item.cc
+++ b/lily/audio-item.cc
@@ -1,9 +1,20 @@
 /*
-  audio-item.cc -- implement Audio items.
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1997--2011 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 1997--2007 Jan Nieuwenhuizen <janneke@gnu.org>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "audio-item.hh"
@@ -28,8 +39,9 @@ Audio_item::get_column () const
 }
 
 Audio_item::Audio_item ()
+  : audio_column_ (0)
+  , channel_ (0)
 {
-  audio_column_ = 0;
 }
 
 Audio_note::Audio_note (Pitch p, Moment m, bool tie_event, Pitch transposing)
@@ -42,13 +54,15 @@ Audio_note::Audio_note (Pitch p, Moment m, bool tie_event, Pitch transposing)
 }
 
 void
-Audio_note::tie_to (Audio_note *t)
+Audio_note::tie_to (Audio_note *t, Moment skip)
 {
   tied_ = t;
   Audio_note *first = t;
   while (first->tied_)
     first = first->tied_;
-  first->length_mom_ += length_mom_;
+  // Add the skip to the tied note and the length of the appended note
+  // to the full duration of the tie...
+  first->length_mom_ += skip + length_mom_;
   length_mom_ = 0;
 }
 
@@ -111,12 +125,12 @@ Audio_span_dynamic::render ()
 
   if (dynamics_.size () <= 1)
     {
-      programming_error ("(de)crescendo on items with specified volume.");
+      programming_error ("Impossible or ambiguous (de)crescendo in MIDI.");
       return ;
     }
-  
+
   Real delta_v = grow_dir_ * 0.1;
-  
+
   Real start_v = dynamics_[0]->volume_;
   if (dynamics_.back ()->volume_ < 0)
     dynamics_.back ()->volume_ = max (min (start_v + grow_dir_ * 0.25, 1.0), 0.1);
@@ -126,17 +140,17 @@ Audio_span_dynamic::render ()
   Moment start = dynamics_[0]->get_column ()->when ();
 
   Real total_t = moment_to_real (dynamics_.back ()->get_column ()->when () - start);
-  
+
   for (vsize i = 1; i < dynamics_.size (); i ++)
     {
       Moment dt_moment = dynamics_[i]->get_column ()->when ()
        - start;
 
       Real dt =  moment_to_real (dt_moment);
-      
+
       Real v = start_v + delta_v *  (dt / total_t);
 
-      dynamics_[i]->volume_ = v;       
+      dynamics_[i]->volume_ = v;
     }
 }