Add C++ bindings

5 files changed, 610 insertions, 0 deletions

diff --git a/lv2/lv2plug.in/ns/ext/atom/atom.hpp b/lv2/lv2plug.in/ns/ext/atom/atom.hpp
new file mode 100644
index 0000000..87871c0
--- /dev/null
+++ b/lv2/lv2plug.in/ns/ext/atom/atom.hpp
@@ -0,0 +1,81 @@
+/*
+  Copyright 2008-2014 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_ATOM_ATOM_HPP
+#define LV2_ATOM_ATOM_HPP
+
+#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
+#include "lv2/lv2plug.in/ns/ext/atom/util.h"
+
+namespace lv2 {
+namespace atom {
+
+typedef LV2_Atom Atom;
+
+struct Event : public LV2_Atom_Event
+{
+	inline uint32_t type() const { return body.type; }
+	inline uint32_t size() const { return body.size; }
+
+	/** Convenience accessor for byte-oriented payloads. */
+	inline uint8_t operator[](size_t i) const {
+		return *((const uint8_t*)(&body + 1) + i);
+	}
+};
+
+class Sequence : public LV2_Atom_Sequence
+{
+public:
+	class const_iterator {
+	public:
+		inline const_iterator(const Event* ev) : m_ev(ev) {}
+
+		inline const_iterator operator++() {
+			m_ev = (const Event*)(
+				(const uint8_t*)m_ev +
+				sizeof(LV2_Atom_Event) +
+				lv2_atom_pad_size(m_ev->body.size));
+			return *this;
+		}
+
+		inline bool operator==(const const_iterator& i) const {
+			return m_ev == i.m_ev;
+		}
+
+		inline bool operator!=(const const_iterator& i) const {
+			return m_ev != i.m_ev;
+		}
+
+		inline const Event& operator*()  const { return *m_ev; }
+		inline const Event* operator->() const { return m_ev; }
+
+	private:
+		const Event* m_ev;
+	};
+
+	inline const_iterator begin() const {
+		return const_iterator((const Event*)(&body + 1));
+	}
+
+	inline const_iterator end() const {
+		return const_iterator((const Event*)((const char*)&body + atom.size));
+	}
+};
+
+} // namespace atom
+} // namespace lv2
+
+#endif // LV2_ATOM_ATOM_HPP
diff --git a/lv2/lv2plug.in/ns/ext/urid/urid.hpp b/lv2/lv2plug.in/ns/ext/urid/urid.hpp
new file mode 100644
index 0000000..38fa8be
--- /dev/null
+++ b/lv2/lv2plug.in/ns/ext/urid/urid.hpp
@@ -0,0 +1,114 @@
+/*
+  Copyright 2015 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_URID_HPP
+#define LV2_URID_HPP
+
+#include "lv2/lv2plug.in/ns/lv2core/Feature.hpp"
+#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+
+namespace lv2 {
+namespace urid {
+
+/**
+   URI mapped to an integer.
+*/
+typedef LV2_URID URID;
+
+/**
+   URID Map Feature (LV2_URID__map)
+*/
+template<bool Required>
+class Map : public Feature<LV2_URID_Map, Required>
+{
+public:
+	Map(const LV2_Feature*const* features,
+	    bool*                    valid)
+		: Feature<LV2_URID_Map, true>(features, LV2_URID__map, valid)
+	{}
+
+	/**
+	   Get the numeric ID of a URI.
+
+	   If the ID does not already exist, it will be created.
+
+	   This function is referentially transparent; any number of calls with the
+	   same arguments is guaranteed to return the same value over the life of a
+	   plugin instance.  Note, however, that several URIs MAY resolve to the
+	   same ID if the host considers those URIs equivalent.
+
+	   This function is not necessarily very fast or RT-safe: plugins SHOULD
+	   cache any IDs they might need in performance critical situations.
+
+	   The return value 0 is reserved and indicates that an ID for that URI
+	   could not be created for whatever reason.  However, hosts SHOULD NOT
+	   return 0 from this function in non-exceptional circumstances (i.e. the
+	   URI map SHOULD be dynamic).
+
+	   @param handle Must be the callback_data member of this struct.
+	   @param uri The URI to be mapped to an integer ID.
+	*/
+	LV2_URID map(const char* uri) {
+		return this->m_data->map(this->m_data->handle, uri);
+	}
+
+	/**
+	   Convenience wrapper for calling map().
+	*/
+	LV2_URID operator()(const char* uri) { return map(uri); }
+};
+
+/**
+   URI Unmap Feature (LV2_URID__unmap)
+*/
+template<bool Required>
+class Unmap : public Feature<LV2_URID_Unmap, Required>
+{
+public:
+	Unmap(const LV2_Feature*const* features,
+	      bool*                    valid)
+		: Feature<LV2_URID_Map, true>(features, LV2_URID__unmap, valid)
+	{}
+
+	/**
+	   Get the URI for a previously mapped numeric ID.
+
+	   Returns NULL if `urid` is not yet mapped.  Otherwise, the corresponding
+	   URI is returned in a canonical form.  This MAY not be the exact same
+	   string that was originally passed to LV2_URID_Map::map(), but it MUST be
+	   an identical URI according to the URI syntax specification (RFC3986).  A
+	   non-NULL return for a given `urid` will always be the same for the life
+	   of the plugin.  Plugins that intend to perform string comparison on
+	   unmapped URIs SHOULD first canonicalise URI strings with a call to
+	   map_uri() followed by a call to unmap_uri().
+
+	   @param handle Must be the callback_data member of this struct.
+	   @param urid The ID to be mapped back to the URI string.
+	*/
+	const char* unmap(LV2_URID urid) {
+		return this->m_data->unmap(this->m_data->handle, urid);
+	}
+
+	/**
+	   Convenience wrapper for calling unmap().
+	*/
+	const char* operator()(LV2_URID urid) { return unmap(urid); }
+};
+
+} // namespace urid
+} // namespace lv2
+
+#endif // LV2_URID_HPP
diff --git a/lv2/lv2plug.in/ns/lv2core/Feature.hpp b/lv2/lv2plug.in/ns/lv2core/Feature.hpp
new file mode 100644
index 0000000..81be218
--- /dev/null
+++ b/lv2/lv2plug.in/ns/lv2core/Feature.hpp
@@ -0,0 +1,74 @@
+/*
+  Copyright 2015 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_FEATURE_HPP
+#define LV2_FEATURE_HPP
+
+#include <string.h>
+
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+
+namespace lv2 {
+
+/**
+   Feature.
+
+   Features allow hosts to make additional functionality available to plugins
+   without requiring modification to the LV2 API.  Extensions may define new
+   features and specify the `URI` and `data` to be used if necessary.
+   Some features, such as lv2:isLive, do not require the host to pass data.
+*/
+template<typename Data, bool Required>
+class Feature
+{
+public:
+	/**
+	   Initialize feature by retrieving data from the host.
+
+	   @param features Feature array passed by the host.
+	   @param uri URI of this feature.
+	   @param valid Set to false iff feature is required but unsupported.
+	*/
+	Feature(const LV2_Feature*const* features,
+	        const char*              uri,
+	        bool*                    valid)
+		: m_data(nullptr)
+		, m_supported(false)
+	{
+		for (const LV2_Feature*const* f = features; *f; ++f) {
+			if (!strcmp((*f)->URI, uri)) {
+				m_data      = (Data*)(*f)->data;
+				m_supported = true;
+				break;
+			}
+		}
+		if (Required && !m_supported) {
+			*valid = false;
+		}
+	}
+
+	Data* data()      const { return m_data; }
+	bool  supported() const { return m_supported; }
+
+protected:
+	Data* m_data;
+	bool  m_supported;
+};
+
+} // namespace lv2
+
+#endif // LV2_URID_HPP
diff --git a/lv2/lv2plug.in/ns/lv2core/Lib.hpp b/lv2/lv2plug.in/ns/lv2core/Lib.hpp
new file mode 100644
index 0000000..5d7670b
--- /dev/null
+++ b/lv2/lv2plug.in/ns/lv2core/Lib.hpp
@@ -0,0 +1,81 @@
+/*
+  Copyright 2015 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_LIB_HPP
+#define LV2_LIB_HPP
+
+#include "lv2/lv2plug.in/ns/lv2core/Plugin.hpp"
+
+namespace lv2 {
+
+/**
+   C++ wrapper for an LV2 plugin library.
+
+   This interface is a convenience for plugin authors only, and is not an ABI
+   used by hosts.  Plugin authors should inherit from this interface, passing
+   their derived class as the template parameter, and provide an
+   lv2_lib_descriptor entry point in C:
+
+   @code
+   class MyLib : public lv2::Lib<MyLib> { ... };
+
+   LV2_SYMBOL_EXPORT static const LV2_Lib_Descriptor*
+   lv2_lib_descriptor(const char*                bundle_path,
+                      const LV2_Feature *const * features)
+   {
+       return new MyLib(bundle_path, features);
+   }
+   @endcode
+*/
+template<class Derived>
+class Lib : public LV2_Lib_Descriptor
+{
+public:
+	/**
+	   Library constructor.
+	*/
+	Lib(const char*              bundle_path,
+	    const LV2_Feature*const* features)
+	{
+		LV2_Lib_Descriptor::handle     = this;
+		LV2_Lib_Descriptor::size       = sizeof(LV2_Lib_Descriptor);
+		LV2_Lib_Descriptor::cleanup    = s_cleanup;
+		LV2_Lib_Descriptor::get_plugin = s_get_plugin;
+	}
+
+	/**
+	   Plugin accessor, override to return your plugin descriptors.
+
+	   Plugins are accessed by index using values from 0 upwards.  Out of range
+	   indices MUST result in this function returning NULL, so the host can
+	   enumerate plugins by increasing `index` until NULL is returned.
+	*/
+	const LV2_Descriptor* get_plugin(uint32_t index) { return NULL; }
+
+private:
+	static void s_cleanup(LV2_Lib_Handle handle) {
+		delete reinterpret_cast<Derived*>(handle);
+	}
+
+	static const LV2_Descriptor* s_get_plugin(LV2_Lib_Handle handle,
+	                                          uint32_t       index) {
+		return reinterpret_cast<Derived*>(handle)->get_plugin(index);
+	}
+};
+
+} /* namespace lv2 */
+
+#endif /* LV2_LIB_HPP */
diff --git a/lv2/lv2plug.in/ns/lv2core/Plugin.hpp b/lv2/lv2plug.in/ns/lv2core/Plugin.hpp
new file mode 100644
index 0000000..f671640
--- /dev/null
+++ b/lv2/lv2plug.in/ns/lv2core/Plugin.hpp
@@ -0,0 +1,260 @@
+/*
+  Copyright 2015 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_PLUGIN_HPP
+#define LV2_PLUGIN_HPP
+
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+
+namespace lv2 {
+
+/**
+   C++ interface for writing an LV2 plugin.
+
+   This interface is a convenience for plugin authors only, and is not an ABI
+   used by hosts.  To implement a plugin, inherit from this interface with the
+   derived class passed as the template parameter.  The C LV2_Descriptor for the
+   plugin can be fetched with descriptor().
+
+   @code
+   class MyPlug : public lv2::Plugin<MyPlug> {
+       // ...
+   };
+
+   static const LV2_Descriptor p = MyPlug::descriptor("http://example.org/plug");
+   @endcode
+
+   This class is a stateless interface and imposes no restrictions or overhead
+   compared to a plugin implemented using the underlying C interface.  Note
+   that this is not a virtual class, so calling methods from a Plugin* base
+   pointer will not work.  Instead, anything that must dispatch on Plugin
+   methods takes a template parameter for static dispatch.
+
+   The destructor will be called when the host cleans up the plugin.
+*/
+template<class Derived>
+class Plugin
+{
+public:
+	/**
+	   Instantiate the plugin.
+
+	   Note that instance initialisation should generally occur in activate()
+	   rather than here. If a host calls instantiate(), it MUST call cleanup()
+	   at some point in the future.
+
+	   @param sample_rate Sample rate, in Hz, for the new plugin instance.
+
+	   @param bundle_path Path to the LV2 bundle which contains this plugin
+	   binary. It MUST include the trailing directory separator (e.g. '/') so
+	   that simply appending a filename will yield the path to that file in the
+	   bundle.
+
+	   @param features A NULL terminated array of LV2_Feature structs which
+	   represent the features the host supports. Plugins may refuse to
+	   instantiate if required features are not found here. However, hosts MUST
+	   NOT use this as a discovery mechanism: instead, use the RDF data to
+	   determine which features are required and do not attempt to instantiate
+	   unsupported plugins at all. This parameter MUST NOT be NULL, i.e. a host
+	   that supports no features MUST pass a single element array containing
+	   NULL.
+
+	   @param valid A pointer to a boolean that must be set to true if the
+	   plugin instantiates correctly.  The C++ wrappers will free the instance
+	   and return NULL to the host automatically on failure.
+
+	   @return A handle for the new plugin instance, or NULL if instantiation
+	   has failed.
+	*/
+	Plugin(double                   sample_rate,
+	       const char*              bundle_path,
+	       const LV2_Feature*const* features,
+	       bool*                    valid)
+	{}
+
+	/**
+	   Connect a port on a plugin instance to a memory location.
+
+	   Plugin writers should be aware that the host may elect to use the same
+	   buffer for more than one port and even use the same buffer for both
+	   input and output (see lv2:inPlaceBroken in lv2.ttl).
+
+	   If the plugin has the feature lv2:hardRTCapable then there are various
+	   things that the plugin MUST NOT do within the connect_port() function;
+	   see lv2core.ttl for details.
+
+	   connect_port() MUST be called at least once for each port before run()
+	   is called, unless that port is lv2:connectionOptional. The plugin must
+	   pay careful attention to the block size passed to run() since the block
+	   allocated may only just be large enough to contain the data, and is not
+	   guaranteed to remain constant between run() calls.
+
+	   connect_port() may be called more than once for a plugin instance to
+	   allow the host to change the buffers that the plugin is reading or
+	   writing. These calls may be made before or after activate() or
+	   deactivate() calls.
+
+	   @param port Index of the port to connect. The host MUST NOT try to
+	   connect a port index that is not defined in the plugin's RDF data. If
+	   it does, the plugin's behaviour is undefined (a crash is likely).
+
+	   @param data_location Pointer to data of the type defined by the port
+	   type in the plugin's RDF data (e.g. an array of float for an
+	   lv2:AudioPort). This pointer must be stored by the plugin instance and
+	   used to read/write data when run() is called. Data present at the time
+	   of the connect_port() call MUST NOT be considered meaningful.
+	*/
+	void connect_port(uint32_t port, void* data_location) {}
+
+	/**
+	   Initialise a plugin instance and activate it for use.
+
+	   This is separated from instantiate() to aid real-time support and so
+	   that hosts can reinitialise a plugin instance by calling deactivate()
+	   and then activate(). In this case the plugin instance MUST reset all
+	   state information dependent on the history of the plugin instance except
+	   for any data locations provided by connect_port(). If there is nothing
+	   for activate() to do then this field may be NULL.
+
+	   When present, hosts MUST call this function once before run() is called
+	   for the first time. This call SHOULD be made as close to the run() call
+	   as possible and indicates to real-time plugins that they are now live,
+	   however plugins MUST NOT rely on a prompt call to run() after
+	   activate().
+
+	   The host MUST NOT call activate() again until deactivate() has been
+	   called first. If a host calls activate(), it MUST call deactivate() at
+	   some point in the future. Note that connect_port() may be called before
+	   or after activate().
+	*/
+	void activate() {}
+
+	/**
+	   Run a plugin instance for a block.
+
+	   Note that if an activate() function exists then it must be called before
+	   run(). If deactivate() is called for a plugin instance then run() may
+	   not be called until activate() has been called again.
+
+	   If the plugin has the feature lv2:hardRTCapable then there are various
+	   things that the plugin MUST NOT do within the run() function (see
+	   lv2core.ttl for details).
+
+	   As a special case, when `sample_count` is 0, the plugin should update
+	   any output ports that represent a single instant in time (e.g. control
+	   ports, but not audio ports). This is particularly useful for latent
+	   plugins, which should update their latency output port so hosts can
+	   pre-roll plugins to compute latency. Plugins MUST NOT crash when
+	   `sample_count` is 0.
+
+	   @param sample_count The block size (in samples) for which the plugin
+	   instance must run.
+	*/
+	void run(uint32_t sample_count) {}
+
+	/**
+	   Deactivate a plugin instance (counterpart to activate()).
+
+	   Hosts MUST deactivate all activated instances after they have been run()
+	   for the last time. This call SHOULD be made as close to the last run()
+	   call as possible and indicates to real-time plugins that they are no
+	   longer live, however plugins MUST NOT rely on prompt deactivation. If
+	   there is nothing for deactivate() to do then this field may be NULL
+
+	   Deactivation is not similar to pausing since the plugin instance will be
+	   reinitialised by activate(). However, deactivate() itself MUST NOT fully
+	   reset plugin state. For example, the host may deactivate a plugin, then
+	   store its state (using some extension to do so).
+
+	   Hosts MUST NOT call deactivate() unless activate() was previously
+	   called. Note that connect_port() may be called before or after
+	   deactivate().
+	*/
+	void deactivate() {}
+
+	/**
+	   Return additional plugin data defined by some extenion.
+
+	   A typical use of this facility is to return a struct containing function
+	   pointers to extend the LV2_Descriptor API.
+
+	   The actual type and meaning of the returned object MUST be specified
+	   precisely by the extension. This function MUST return NULL for any
+	   unsupported URI. If a plugin does not support any extension data, this
+	   field may be NULL.
+
+	   The host is never responsible for freeing the returned value.
+	*/
+	static const void* extension_data(const char* uri) { return NULL; }
+
+	/**
+	   Get an LV2_Descriptor for a plugin class.
+
+	   @code
+	   static const LV2_Descriptor a = lv2::descriptor<Amp>("http://example.org/amp");
+	   @endcode
+	*/
+	static LV2_Descriptor descriptor(const char* uri) {
+		const LV2_Descriptor desc = { uri,
+		                              &s_instantiate,
+		                              &s_connect_port,
+		                              &s_activate,
+		                              &s_run,
+		                              &s_deactivate,
+		                              &s_cleanup,
+		                              &Plugin::extension_data };
+		return desc;
+	}
+
+private:
+	static LV2_Handle s_instantiate(const LV2_Descriptor*     descriptor,
+	                                double                    rate,
+	                                const char*               bundle,
+	                                const LV2_Feature* const* features) {
+		bool     valid    = true;
+		Derived* instance = new Derived(rate, bundle, features, &valid);
+		if (!valid) {
+			delete instance;
+			return nullptr;
+		}
+		return reinterpret_cast<LV2_Handle>(instance);
+	}
+
+	static void s_connect_port(LV2_Handle instance, uint32_t port, void* buf) {
+		reinterpret_cast<Derived*>(instance)->connect_port(port, buf);
+	}
+
+	static void s_activate(LV2_Handle instance) {
+		reinterpret_cast<Derived*>(instance)->activate();
+	}
+
+	static void s_run(LV2_Handle instance, uint32_t sample_count) {
+		reinterpret_cast<Derived*>(instance)->run(sample_count);
+	}
+
+	static void s_deactivate(LV2_Handle instance) {
+		reinterpret_cast<Derived*>(instance)->deactivate();
+	}
+
+	static void s_cleanup(LV2_Handle instance) {
+		delete reinterpret_cast<Derived*>(instance);
+	}
+};
+
+} /* namespace lv2 */
+
+#endif /* LV2_PLUGIN_HPP */
+