1 files changed, 77 insertions, 0 deletions
diff --git a/src/libs/engine/MidiBuffer.cpp b/src/libs/engine/MidiBuffer.cpp
new file mode 100644
index 00000000..7dfe72e6
--- /dev/null
+++ b/src/libs/engine/MidiBuffer.cpp
@@ -0,0 +1,77 @@
+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "MidiBuffer.h"
+
+namespace Ingen {
+
+
+/** Use another buffer's data instead of the local one.
+ *
+ * This buffer will essentially be identical to @a buf after this call.
+ */
+bool
+MidiBuffer::join(Buffer* buf)
+{
+	MidiBuffer* mbuf = dynamic_cast<MidiBuffer*>(buf);
+	if (!mbuf)
+		return false;
+
+	//assert(mbuf->size() == _size);
+	
+	_joined_buf = mbuf;
+	
+	_buf = mbuf->data();
+	_state = mbuf->state();
+
+	return true;
+}
+
+	
+void
+MidiBuffer::unjoin()
+{
+	_joined_buf = NULL;
+	_buf   = _local_buf;
+	_state = &_local_state;
+}
+
+
+bool
+MidiBuffer::is_joined_to(Buffer* buf) const
+{
+	MidiBuffer* mbuf = dynamic_cast<MidiBuffer*>(buf);
+	if (mbuf)
+		return (data() == mbuf->data());
+
+	return false;
+}
+
+
+void
+MidiBuffer::prepare(SampleCount nframes)
+{
+	if (_joined_buf)
+		_local_state = *_joined_buf->state();
+	else
+		reset_state(nframes);
+
+	_this_nframes = nframes;
+}
+
+
+} // namespace Ingen