From 138a87e915ad3aff184730415105f94c874174bf Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Wed, 20 Apr 2011 16:26:40 +0000
Subject: Rename Ingen::Engine to Ingen::Server (hopefully avoid odd name
 clases and fix #675).

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@3184 a436a847-0d15-0410-975c-d299462d15a1
---
 src/server/ConnectionImpl.hpp | 110 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 src/server/ConnectionImpl.hpp

(limited to 'src/server/ConnectionImpl.hpp')

diff --git a/src/server/ConnectionImpl.hpp b/src/server/ConnectionImpl.hpp
new file mode 100644
index 00000000..ce30eaa4
--- /dev/null
+++ b/src/server/ConnectionImpl.hpp
@@ -0,0 +1,110 @@
+/* This file is part of Ingen.
+ * Copyright 2007-2011 David 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_ENGINE_CONNECTIONIMPL_HPP
+#define INGEN_ENGINE_CONNECTIONIMPL_HPP
+
+#include <cstdlib>
+#include <boost/utility.hpp>
+#include "raul/log.hpp"
+#include "raul/Deletable.hpp"
+#include "raul/IntrusivePtr.hpp"
+#include "ingen/PortType.hpp"
+#include "ingen/Connection.hpp"
+#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
+#include "PortImpl.hpp"
+
+using namespace std;
+
+namespace Ingen {
+namespace Server {
+
+class PortImpl;
+class OutputPort;
+class InputPort;
+class Buffer;
+class BufferFactory;
+
+/** Represents a single inbound connection for an InputPort.
+ *
+ * This can be a group of ports (ie coming from a polyphonic Node) or
+ * a single Port.  This class exists basically as an abstraction of mixing
+ * down polyphonic inputs, so InputPort can just deal with mixing down
+ * multiple connections (oblivious to the polyphonic situation of the
+ * connection itself).
+ *
+ * \ingroup engine
+ */
+class ConnectionImpl : public Raul::Deletable, public Connection
+{
+public:
+	ConnectionImpl(BufferFactory& bufs, PortImpl* src_port, PortImpl* dst_port);
+
+	PortImpl* src_port() const { return _src_port; }
+	PortImpl* dst_port() const { return _dst_port; }
+
+	const Raul::Path src_port_path() const { return _src_port->path(); }
+	const Raul::Path dst_port_path() const { return _dst_port->path(); }
+
+	/** Used by some (recursive) events to prevent double disconnections */
+	bool pending_disconnection()       { return _pending_disconnection; }
+	void pending_disconnection(bool b) { _pending_disconnection = b; }
+
+	void queue(Context& context);
+
+	void get_sources(Context& context, uint32_t voice,
+			IntrusivePtr<Buffer>* srcs, uint32_t max_num_srcs, uint32_t& num_srcs);
+
+	/** Get the buffer for a particular voice.
+	 * A Connection is smart - it knows the destination port requesting the
+	 * buffer, and will return accordingly (e.g. the same buffer for every
+	 * voice in a mono->poly connection).
+	 */
+	inline BufferFactory::Ref buffer(uint32_t voice) const {
+		assert(!must_mix());
+		assert(!must_queue());
+		assert(_src_port->poly() == 1 || _src_port->poly() > voice);
+		if (_src_port->poly() == 1) {
+			return _src_port->buffer(0);
+		} else {
+			return _src_port->buffer(voice);
+		}
+	}
+
+	/** Returns true if this connection must mix down voices into a local buffer */
+	inline bool must_mix() const { return _src_port->poly() > _dst_port->poly(); }
+
+	/** Returns true if this connection crosses contexts and must buffer */
+	inline bool must_queue() const { return _src_port->context() != _dst_port->context(); }
+
+	static bool can_connect(const OutputPort* src, const InputPort* dst);
+
+protected:
+	void dump() const;
+
+	Raul::RingBuffer* _queue;
+
+	BufferFactory&     _bufs;
+	PortImpl* const    _src_port;
+	PortImpl* const    _dst_port;
+	bool               _pending_disconnection;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_CONNECTIONIMPL_HPP
-- 
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