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+/*
+ This file is part of Ingen.
+ Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+ Ingen is free software: you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with Ingen. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_NODEIMPLIMPL_HPP
+#define INGEN_ENGINE_NODEIMPLIMPL_HPP
+
+#include <cassert>
+#include <cstddef>
+#include <map>
+
+#include "ingen/Node.hpp"
+#include "ingen/Resource.hpp"
+#include "raul/Deletable.hpp"
+#include "raul/Path.hpp"
+#include "raul/SharedPtr.hpp"
+
+namespace Raul { class Maid; }
+
+namespace Ingen {
+
+namespace Shared { class URIs; }
+
+namespace Server {
+
+class BufferFactory;
+class Context;
+class GraphImpl;
+class ProcessContext;
+
+/** An object on the audio graph (a Graph, Block, or Port).
+ *
+ * Each of these is a Raul::Deletable and so can be deleted in a realtime safe
+ * way from anywhere, and they all have a map of variable for clients to store
+ * arbitrary values in (which the engine puts no significance to whatsoever).
+ *
+ * \ingroup engine
+ */
+class NodeImpl : public Node
+{
+public:
+ virtual ~NodeImpl() {}
+
+ const Raul::Symbol& symbol() const { return _symbol; }
+
+ Node* graph_parent() const { return _parent; }
+ NodeImpl* parent() const { return _parent; }
+
+ /** Rename */
+ virtual void set_path(const Raul::Path& new_path) {
+ _path = new_path;
+ const char* const new_sym = new_path.symbol();
+ if (new_sym[0] != '\0') {
+ _symbol = Raul::Symbol(new_sym);
+ }
+ set_uri(Node::path_to_uri(new_path));
+ }
+
+ const Raul::Atom& get_property(const Raul::URI& key) const;
+
+ /** The Graph this object is a child of. */
+ virtual GraphImpl* parent_graph() const;
+
+ const Raul::Path& path() const { return _path; }
+
+ /** Prepare for a new (external) polyphony value.
+ *
+ * Preprocessor thread, poly is actually applied by apply_poly.
+ * \return true on success.
+ */
+ virtual bool prepare_poly(BufferFactory& bufs, uint32_t poly) = 0;
+
+ /** Apply a new (external) polyphony value.
+ *
+ * Audio thread.
+ *
+ * \param poly Must be <= the most recent value passed to prepare_poly.
+ * \param maid Any objects no longer needed will be pushed to this
+ */
+ virtual bool apply_poly(
+ ProcessContext& context, Raul::Maid& maid, uint32_t poly) = 0;
+
+protected:
+ NodeImpl(Ingen::URIs& uris,
+ NodeImpl* parent,
+ const Raul::Symbol& symbol);
+
+ NodeImpl* _parent;
+ Raul::Path _path;
+ Raul::Symbol _symbol;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_NODEIMPLIMPL_HPP