Add Transpose class that can be used by apply_midi_note_edit_op.

1 files changed, 49 insertions, 0 deletions

diff --git a/libs/ardour/transpose.cc b/libs/ardour/transpose.cc
new file mode 100644
index 0000000000..ca0b7abf4e
--- /dev/null
+++ b/libs/ardour/transpose.cc
@@ -0,0 +1,49 @@
+/*
+    Copyright (C) 2015 Paul Davis
+    Author: André Nusser
+
+    This program 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 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "ardour/transpose.h"
+
+namespace ARDOUR {
+
+Transpose::Transpose(int semitones)
+	: _semitones(semitones)
+{}
+
+Command*
+Transpose::operator()(boost::shared_ptr<MidiModel> model,
+                      Evoral::Beats                position,
+                      std::vector<Notes>&          seqs)
+{
+	typedef MidiModel::NoteDiffCommand Command;
+
+	Command* cmd = new Command(model, name());
+
+	for (std::vector<Notes>::iterator s = seqs.begin(); s != seqs.end(); ++s) {
+		for (Notes::const_iterator i = (*s).begin(); i != (*s).end(); ++i) {
+
+			const NotePtr note = *i;
+
+			model->transpose (cmd, *i, _semitones);
+		}
+	}
+
+	return cmd;
+}
+
+}  // namespace ARDOUR