1 files changed, 91 insertions, 0 deletions
diff --git a/src/libs/engine/Port.hpp b/src/libs/engine/Port.hpp
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+++ b/src/libs/engine/Port.hpp
@@ -0,0 +1,91 @@
+/* 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
+ */
+
+#ifndef PORT_H
+#define PORT_H
+
+#include <cstdlib>
+#include <string>
+#include <raul/Array.hpp>
+#include "types.hpp"
+#include "GraphObject.hpp"
+#include "DataType.hpp"
+
+namespace Ingen {
+
+class Node;
+class Buffer;
+
+
+/** A port on a Node.
+ *
+ * This is a non-template abstract base class, which basically exists so
+ * things can pass around Port pointers and not have to worry about type,
+ * templates, etc.
+ *
+ * \ingroup engine
+ */
+class Port : public GraphObject
+{
+public:
+	virtual ~Port();
+
+	/** A port's parent is always a node, so static cast should be safe */
+	Node* parent_node() const { return (Node*)_parent; }
+
+	Buffer* buffer(size_t voice) const { return _buffers.at(voice); }
+
+	/** Called once per process cycle */
+	virtual void pre_process(SampleCount nframes, FrameTime start, FrameTime end) = 0;
+	virtual void process(SampleCount nframes, FrameTime start, FrameTime end) {}
+	virtual void post_process(SampleCount nframes, FrameTime start, FrameTime end) {};
+	
+	/** Empty buffer contents completely (ie silence) */
+	virtual void clear_buffers();
+	
+	virtual bool is_input()  const = 0;
+	virtual bool is_output() const = 0;
+
+	size_t   num()         const { return _index; }
+	size_t   poly()        const { return _poly; }
+	DataType type()        const { return _type; }
+	size_t   buffer_size() const { return _buffer_size; }
+
+	virtual void set_buffer_size(size_t size);
+	
+	void fixed_buffers(bool b) { _fixed_buffers = b; }
+	bool fixed_buffers()       { return _fixed_buffers; }
+
+protected:
+	Port(Node* const node, const std::string& name, size_t index, size_t poly, DataType type, size_t buffer_size);
+	
+	virtual void allocate_buffers();
+	virtual void connect_buffers();
+
+	size_t    _index;
+	size_t    _poly;
+	DataType  _type;
+	size_t    _buffer_size;
+	bool      _fixed_buffers;
+
+	Raul::Array<Buffer*> _buffers;
+};
+
+
+} // namespace Ingen
+
+#endif // PORT_H