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+/* 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_PORTIMPL_HPP
+#define INGEN_ENGINE_PORTIMPL_HPP
+
+#include <cstdlib>
+#include <string>
+#include <set>
+#include "raul/Array.hpp"
+#include "raul/Atom.hpp"
+#include "ingen/Port.hpp"
+#include "types.hpp"
+#include "GraphObjectImpl.hpp"
+#include "ingen/PortType.hpp"
+#include "Buffer.hpp"
+#include "Context.hpp"
+
+namespace Raul { class Maid; }
+
+namespace Ingen {
+namespace Server {
+
+class NodeImpl;
+class Buffer;
+class BufferFactory;
+
+/** 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 PortImpl : public GraphObjectImpl, public Port
+{
+public:
+ ~PortImpl();
+
+ /** A port's parent is always a node, so static cast should be safe */
+ NodeImpl* parent_node() const { return (NodeImpl*)_parent; }
+
+ /** Set the buffers array for this port.
+ *
+ * Audio thread. Returned value must be freed by caller.
+ * \a buffers must be poly() long
+ */
+ Raul::Array<BufferFactory::Ref>* set_buffers(Raul::Array<BufferFactory::Ref>* buffers);
+
+ /** Prepare for a new (external) polyphony value.
+ *
+ * Preprocessor thread, poly is actually applied by apply_poly.
+ */
+ virtual bool prepare_poly(BufferFactory& bufs, uint32_t poly);
+
+ virtual void prepare_poly_buffers(BufferFactory& bufs);
+
+ /** Apply a new polyphony value.
+ *
+ * Audio thread.
+ * \a poly Must be < the most recent value passed to prepare_poly.
+ */
+ virtual bool apply_poly(Raul::Maid& maid, uint32_t poly);
+
+ const Raul::Atom& value() const { return _value; }
+ void set_value(const Raul::Atom& v) { _value = v; }
+
+ inline BufferFactory::Ref buffer(uint32_t voice) const {
+ return _buffers->at((_poly == 1) ? 0 : voice);
+ }
+ inline BufferFactory::Ref prepared_buffer(uint32_t voice) const {
+ return _prepared_buffers->at(voice);
+ }
+
+ /** Called once per process cycle */
+ virtual void pre_process(Context& context) = 0;
+ virtual void post_process(Context& context) = 0;
+
+ /** Empty buffer contents completely (ie silence) */
+ virtual void clear_buffers();
+
+ virtual bool get_buffers(BufferFactory& bufs,
+ Raul::Array<BufferFactory::Ref>* buffers,
+ uint32_t poly) = 0;
+
+ void setup_buffers(BufferFactory& bufs, uint32_t poly) {
+ get_buffers(bufs, _buffers, poly);
+ }
+
+ virtual void connect_buffers(SampleCount offset=0);
+ virtual void recycle_buffers();
+
+ virtual bool is_input() const = 0;
+ virtual bool is_output() const = 0;
+
+ uint32_t index() const { return _index; }
+
+ const PortTypes& types() const { return _types; }
+
+ PortType buffer_type() const;
+
+ bool supports(const Raul::URI& value_type) const;
+
+ size_t buffer_size() const { return _buffer_size; }
+
+ uint32_t poly() const {
+ return _poly;
+ }
+ uint32_t prepared_poly() const {
+ return (_prepared_buffers) ? _prepared_buffers->size() : 1;
+ }
+
+ void set_buffer_size(Context& context, BufferFactory& bufs, size_t size);
+ void set_buffer_type(PortType type);
+
+ void broadcast(bool b) { _broadcast = b; }
+ bool broadcast() { return _broadcast; }
+
+ void broadcast_value(Context& context, bool force=false);
+
+ void raise_set_by_user_flag() { _set_by_user = true; }
+
+ Context::ID context() const { return _context; }
+ void set_context(Context::ID c);
+
+ BufferFactory& bufs() const { return _bufs; }
+
+protected:
+ PortImpl(BufferFactory& bufs,
+ NodeImpl* node,
+ const Raul::Symbol& name,
+ uint32_t index,
+ uint32_t poly,
+ PortType type,
+ const Raul::Atom& value,
+ size_t buffer_size);
+
+ BufferFactory& _bufs;
+ uint32_t _index;
+ uint32_t _poly;
+ uint32_t _buffer_size;
+ PortType _buffer_type;
+ std::set<PortType> _types;
+ Raul::Atom _value;
+ bool _broadcast;
+ bool _set_by_user;
+ Raul::Atom _last_broadcasted_value;
+
+ Context::ID _context;
+ Raul::Array<BufferFactory::Ref>* _buffers;
+
+ // Dynamic polyphony
+ Raul::Array<BufferFactory::Ref>* _prepared_buffers;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_PORTIMPL_HPP