1 files changed, 152 insertions, 0 deletions
diff --git a/src/server/LV2Block.hpp b/src/server/LV2Block.hpp
new file mode 100644
index 00000000..8a362fec
--- /dev/null
+++ b/src/server/LV2Block.hpp
@@ -0,0 +1,152 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2016 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_LV2BLOCK_HPP
+#define INGEN_ENGINE_LV2BLOCK_HPP
+
+#include <mutex>
+
+#include "lilv/lilv.h"
+#include "lv2/worker/worker.h"
+#include "raul/Maid.hpp"
+
+#include "BufferRef.hpp"
+#include "BlockImpl.hpp"
+#include "ingen/LV2Features.hpp"
+#include "types.hpp"
+
+namespace ingen {
+namespace server {
+
+class LV2Plugin;
+
+/** An instance of a LV2 plugin.
+ *
+ * \ingroup engine
+ */
+class LV2Block : public BlockImpl
+{
+public:
+	LV2Block(LV2Plugin*          plugin,
+	         const Raul::Symbol& symbol,
+	         bool                polyphonic,
+	         GraphImpl*          parent,
+	         SampleRate          srate);
+
+	~LV2Block();
+
+	bool instantiate(BufferFactory& bufs, const LilvState* state);
+
+	LilvInstance* instance() override { return instance(0); }
+	bool          save_state(const FilePath& dir) const override;
+
+	BlockImpl* duplicate(Engine&             engine,
+	                     const Raul::Symbol& symbol,
+	                     GraphImpl*          parent) override;
+
+	bool prepare_poly(BufferFactory& bufs, uint32_t poly) override;
+	bool apply_poly(RunContext& context, uint32_t poly) override;
+
+	void activate(BufferFactory& bufs) override;
+	void deactivate() override;
+
+	LV2_Worker_Status work(uint32_t size, const void* data);
+
+	void run(RunContext& context) override;
+	void post_process(RunContext& context) override;
+
+	LilvState* load_preset(const URI& uri) override;
+
+	void apply_state(const UPtr<Worker>& worker, const LilvState* state) override;
+
+	boost::optional<Resource> save_preset(const URI&        uri,
+	                                      const Properties& props) override;
+
+	void set_port_buffer(uint32_t    voice,
+	                     uint32_t    port_num,
+	                     BufferRef   buf,
+	                     SampleCount offset) override;
+
+	static LilvState* load_state(World* world, const FilePath& path);
+
+protected:
+	struct Instance : public Raul::Noncopyable {
+		explicit Instance(LilvInstance* i) : instance(i) {}
+
+		~Instance() { lilv_instance_free(instance); }
+
+		LilvInstance* const instance;
+	};
+
+	SPtr<Instance> make_instance(URIs&      uris,
+	                             SampleRate rate,
+	                             uint32_t   voice,
+	                             bool       preparing);
+
+	inline LilvInstance* instance(uint32_t voice) {
+		return (LilvInstance*)(*_instances)[voice]->instance;
+	}
+
+	typedef Raul::Array< SPtr<Instance> > Instances;
+
+	void drop_instances(const MPtr<Instances>& instances) {
+		if (instances) {
+			for (size_t i = 0; i < instances->size(); ++i) {
+				(*instances)[i].reset();
+			}
+		}
+	}
+
+	struct Response : public Raul::Maid::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;
+	MPtr<Instances>                 _instances;
+	MPtr<Instances>                 _prepared_instances;
+	const LV2_Worker_Interface*     _worker_iface;
+	std::mutex                      _work_mutex;
+	Responses                       _responses;
+	SPtr<LV2Features::FeatureArray> _features;
+};
+
+} // namespace server
+} // namespace ingen
+
+#endif // INGEN_ENGINE_LV2BLOCK_HPP