/*
  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_LV2NODE_HPP
#define INGEN_ENGINE_LV2NODE_HPP

#include "lilv/lilv.h"
#include "lv2/lv2plug.in/ns/ext/worker/worker.h"
#include "raul/Disposable.hpp"

#include "BufferRef.hpp"
#include "NodeImpl.hpp"
#include "ingen/LV2Features.hpp"
#include "types.hpp"

namespace Ingen {
namespace Server {

class LV2Plugin;

/** An instance of a LV2 plugin.
 *
 * \ingroup engine
 */
class LV2Node : public NodeImpl
{
public:
	LV2Node(LV2Plugin*          plugin,
	        const Raul::Symbol& symbol,
	        bool                polyphonic,
	        PatchImpl*          parent,
	        SampleRate          srate);

	~LV2Node();

	bool instantiate(BufferFactory& bufs);

	bool prepare_poly(BufferFactory& bufs, uint32_t poly);
	bool apply_poly(ProcessContext& context, Raul::Maid& maid, uint32_t poly);

	void activate(BufferFactory& bufs);
	void deactivate();

	void work(uint32_t size, const void* data);

	void process(ProcessContext& context);

	void set_port_buffer(uint32_t  voice,
	                     uint32_t  port_num,
	                     BufferRef buf);

protected:
	SharedPtr<LilvInstance> make_instance(URIs&      uris,
	                                      SampleRate rate,
	                                      uint32_t   voice,
	                                      bool       preparing);

	inline LilvInstance* instance(uint32_t voice) {
		return (LilvInstance*)(*_instances)[voice].get();
	}

	typedef Raul::Array< SharedPtr<void> > Instances;

	struct Response : public Raul::Disposable
	                , public Raul::Noncopyable
	                , public boost::intrusive::slist_base_hook<>
	{
		inline Response(uint32_t s, const void* d)
			: size(s)
			, data(malloc(s))
		{
			memcpy(data, d, s);
		}

		~Response() {
			free(data);
		}

		const uint32_t size;
		void* const    data;
	};

	typedef boost::intrusive::slist<Response,
	                                boost::intrusive::cache_last<true>,
	                                boost::intrusive::constant_time_size<false>
	                                > Responses;

	static LV2_Worker_Status work_respond(
		LV2_Worker_Respond_Handle handle, uint32_t size, const void* data);

	LV2Plugin*                           _lv2_plugin;
	Instances*                           _instances;
	Instances*                           _prepared_instances;
	const LV2_Worker_Interface*          _worker_iface;
	Responses                            _responses;
	SharedPtr<LV2Features::FeatureArray> _features;
};

} // namespace Server
} // namespace Ingen

#endif // INGEN_ENGINE_LV2NODE_HPP