Add new Delay internal.

Preliminary work towards split cycles.


git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@2485 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 79 insertions, 0 deletions

diff --git a/src/engine/internals/Delay.hpp b/src/engine/internals/Delay.hpp
new file mode 100644
index 00000000..077c65f9
--- /dev/null
+++ b/src/engine/internals/Delay.hpp
@@ -0,0 +1,79 @@
+/* This file is part of Ingen.
+ * Copyright (C) 2007-2009 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
+ */
+
+#ifndef INGEN_INTERNALS_DELAY_HPP
+#define INGEN_INTERNALS_DELAY_HPP
+
+#include <string>
+#include <math.h>
+#include "types.hpp"
+//#include "Buffer.hpp"
+//#include "BufferFactory.hpp"
+#include "NodeBase.hpp"
+
+namespace Ingen {
+
+class InputPort;
+class OutputPort;
+class InternalPlugin;
+class BufferFactory;
+
+namespace Internals {
+
+
+/** MIDI note input node.
+ *
+ * For pitched instruments like keyboard, etc.
+ *
+ * \ingroup engine
+ */
+class DelayNode : public NodeBase
+{
+public:
+	DelayNode(BufferFactory& bufs, const std::string& path, bool polyphonic, PatchImpl* parent, SampleRate srate);
+	~DelayNode();
+
+	void activate(BufferFactory& bufs);
+
+	void process(ProcessContext& context);
+
+	static InternalPlugin& internal_plugin();
+
+	float delay_samples() const { return _delay_samples; }
+
+private:
+	inline float& buffer_at(long phase) const { return _buffer[phase & _buffer_mask]; }
+
+	InputPort*  _delay_port;
+	InputPort*  _in_port;
+	OutputPort* _out_port;
+
+	typedef long Phase;
+
+	float*   _buffer;
+	uint32_t _buffer_length;
+	uint32_t _buffer_mask;
+	Phase    _write_phase;
+	float    _last_delay_time;
+	float    _delay_samples;
+};
+
+
+} // namespace Ingen
+} // namespace Internals
+
+#endif // INGEN_INTERNALS_DELAY_HPP