More juggling

git-svn-id: http://svn.drobilla.net/lad/grauph@15 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 80 insertions, 0 deletions

diff --git a/src/libs/engine/Port.h b/src/libs/engine/Port.h
new file mode 100644
index 00000000..f51d7382
--- /dev/null
+++ b/src/libs/engine/Port.h
@@ -0,0 +1,80 @@
+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om 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.
+ * 
+ * Om 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.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef PORT_H
+#define PORT_H
+
+#include <cstdlib>
+#include <string>
+#include "util/types.h"
+#include "OmObject.h"
+
+using std::string;
+
+namespace Om {
+
+class Node;
+class PortInfo;
+
+
+/** 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 OmObject
+{
+public:
+	virtual ~Port() {}
+
+	Port* as_port() { return this; }
+	
+	PortInfo* port_info() const       { return m_port_info; }
+	void      port_info(PortInfo* pi) { m_port_info = pi; }
+	
+	void add_to_store();
+	void remove_from_store();
+
+	/** Called once per process cycle */
+	virtual void prepare_buffers(size_t nframes) = 0;
+	
+	/** Empty buffer contents completely (ie silence) */
+	virtual void clear_buffers() = 0;
+	
+	Node*  parent_node() const { return m_parent->as_node(); }
+	bool   is_sample()   const { return false; }
+	size_t num()         const { return m_index; }
+	size_t poly()        const { return m_poly; }
+
+protected:
+	Port(Node* const node, const string& name, size_t index, size_t poly, PortInfo* port_info);
+	
+	// Prevent copies (undefined)
+	Port(const Port&);
+	Port& operator=(const Port&);
+
+	size_t    m_index;
+	size_t    m_poly;
+	PortInfo* m_port_info;
+};
+
+
+} // namespace Om
+
+#endif // PORT_H