--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/distrho/src/lv2/lv2.h	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,476 @@
+/*
+  LV2 - An audio plugin interface specification.
+  Copyright 2006-2012 Steve Harris, David Robillard.
+
+  Based on LADSPA, Copyright 2000-2002 Richard W.E. Furse,
+  Paul Barton-Davis, Stefan Westerfeld.
+
+  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.
+*/
+
+/**
+   @defgroup lv2core LV2 Core
+
+   Core LV2 specification, see <http://lv2plug.in/ns/lv2core> for details.
+
+   @{
+*/
+
+#ifndef LV2_H_INCLUDED
+#define LV2_H_INCLUDED
+
+#include <stdint.h>
+
+#define LV2_CORE_URI    "http://lv2plug.in/ns/lv2core"  ///< http://lv2plug.in/ns/lv2core
+#define LV2_CORE_PREFIX LV2_CORE_URI "#"                ///< http://lv2plug.in/ns/lv2core#
+
+#define LV2_CORE__AllpassPlugin      LV2_CORE_PREFIX "AllpassPlugin"       ///< http://lv2plug.in/ns/lv2core#AllpassPlugin
+#define LV2_CORE__AmplifierPlugin    LV2_CORE_PREFIX "AmplifierPlugin"     ///< http://lv2plug.in/ns/lv2core#AmplifierPlugin
+#define LV2_CORE__AnalyserPlugin     LV2_CORE_PREFIX "AnalyserPlugin"      ///< http://lv2plug.in/ns/lv2core#AnalyserPlugin
+#define LV2_CORE__AudioPort          LV2_CORE_PREFIX "AudioPort"           ///< http://lv2plug.in/ns/lv2core#AudioPort
+#define LV2_CORE__BandpassPlugin     LV2_CORE_PREFIX "BandpassPlugin"      ///< http://lv2plug.in/ns/lv2core#BandpassPlugin
+#define LV2_CORE__CVPort             LV2_CORE_PREFIX "CVPort"              ///< http://lv2plug.in/ns/lv2core#CVPort
+#define LV2_CORE__ChorusPlugin       LV2_CORE_PREFIX "ChorusPlugin"        ///< http://lv2plug.in/ns/lv2core#ChorusPlugin
+#define LV2_CORE__CombPlugin         LV2_CORE_PREFIX "CombPlugin"          ///< http://lv2plug.in/ns/lv2core#CombPlugin
+#define LV2_CORE__CompressorPlugin   LV2_CORE_PREFIX "CompressorPlugin"    ///< http://lv2plug.in/ns/lv2core#CompressorPlugin
+#define LV2_CORE__ConstantPlugin     LV2_CORE_PREFIX "ConstantPlugin"      ///< http://lv2plug.in/ns/lv2core#ConstantPlugin
+#define LV2_CORE__ControlPort        LV2_CORE_PREFIX "ControlPort"         ///< http://lv2plug.in/ns/lv2core#ControlPort
+#define LV2_CORE__ConverterPlugin    LV2_CORE_PREFIX "ConverterPlugin"     ///< http://lv2plug.in/ns/lv2core#ConverterPlugin
+#define LV2_CORE__DelayPlugin        LV2_CORE_PREFIX "DelayPlugin"         ///< http://lv2plug.in/ns/lv2core#DelayPlugin
+#define LV2_CORE__DistortionPlugin   LV2_CORE_PREFIX "DistortionPlugin"    ///< http://lv2plug.in/ns/lv2core#DistortionPlugin
+#define LV2_CORE__DynamicsPlugin     LV2_CORE_PREFIX "DynamicsPlugin"      ///< http://lv2plug.in/ns/lv2core#DynamicsPlugin
+#define LV2_CORE__EQPlugin           LV2_CORE_PREFIX "EQPlugin"            ///< http://lv2plug.in/ns/lv2core#EQPlugin
+#define LV2_CORE__EnvelopePlugin     LV2_CORE_PREFIX "EnvelopePlugin"      ///< http://lv2plug.in/ns/lv2core#EnvelopePlugin
+#define LV2_CORE__ExpanderPlugin     LV2_CORE_PREFIX "ExpanderPlugin"      ///< http://lv2plug.in/ns/lv2core#ExpanderPlugin
+#define LV2_CORE__ExtensionData      LV2_CORE_PREFIX "ExtensionData"       ///< http://lv2plug.in/ns/lv2core#ExtensionData
+#define LV2_CORE__Feature            LV2_CORE_PREFIX "Feature"             ///< http://lv2plug.in/ns/lv2core#Feature
+#define LV2_CORE__FilterPlugin       LV2_CORE_PREFIX "FilterPlugin"        ///< http://lv2plug.in/ns/lv2core#FilterPlugin
+#define LV2_CORE__FlangerPlugin      LV2_CORE_PREFIX "FlangerPlugin"       ///< http://lv2plug.in/ns/lv2core#FlangerPlugin
+#define LV2_CORE__FunctionPlugin     LV2_CORE_PREFIX "FunctionPlugin"      ///< http://lv2plug.in/ns/lv2core#FunctionPlugin
+#define LV2_CORE__GatePlugin         LV2_CORE_PREFIX "GatePlugin"          ///< http://lv2plug.in/ns/lv2core#GatePlugin
+#define LV2_CORE__GeneratorPlugin    LV2_CORE_PREFIX "GeneratorPlugin"     ///< http://lv2plug.in/ns/lv2core#GeneratorPlugin
+#define LV2_CORE__HighpassPlugin     LV2_CORE_PREFIX "HighpassPlugin"      ///< http://lv2plug.in/ns/lv2core#HighpassPlugin
+#define LV2_CORE__InputPort          LV2_CORE_PREFIX "InputPort"           ///< http://lv2plug.in/ns/lv2core#InputPort
+#define LV2_CORE__InstrumentPlugin   LV2_CORE_PREFIX "InstrumentPlugin"    ///< http://lv2plug.in/ns/lv2core#InstrumentPlugin
+#define LV2_CORE__LimiterPlugin      LV2_CORE_PREFIX "LimiterPlugin"       ///< http://lv2plug.in/ns/lv2core#LimiterPlugin
+#define LV2_CORE__LowpassPlugin      LV2_CORE_PREFIX "LowpassPlugin"       ///< http://lv2plug.in/ns/lv2core#LowpassPlugin
+#define LV2_CORE__MixerPlugin        LV2_CORE_PREFIX "MixerPlugin"         ///< http://lv2plug.in/ns/lv2core#MixerPlugin
+#define LV2_CORE__ModulatorPlugin    LV2_CORE_PREFIX "ModulatorPlugin"     ///< http://lv2plug.in/ns/lv2core#ModulatorPlugin
+#define LV2_CORE__MultiEQPlugin      LV2_CORE_PREFIX "MultiEQPlugin"       ///< http://lv2plug.in/ns/lv2core#MultiEQPlugin
+#define LV2_CORE__OscillatorPlugin   LV2_CORE_PREFIX "OscillatorPlugin"    ///< http://lv2plug.in/ns/lv2core#OscillatorPlugin
+#define LV2_CORE__OutputPort         LV2_CORE_PREFIX "OutputPort"          ///< http://lv2plug.in/ns/lv2core#OutputPort
+#define LV2_CORE__ParaEQPlugin       LV2_CORE_PREFIX "ParaEQPlugin"        ///< http://lv2plug.in/ns/lv2core#ParaEQPlugin
+#define LV2_CORE__PhaserPlugin       LV2_CORE_PREFIX "PhaserPlugin"        ///< http://lv2plug.in/ns/lv2core#PhaserPlugin
+#define LV2_CORE__PitchPlugin        LV2_CORE_PREFIX "PitchPlugin"         ///< http://lv2plug.in/ns/lv2core#PitchPlugin
+#define LV2_CORE__Plugin             LV2_CORE_PREFIX "Plugin"              ///< http://lv2plug.in/ns/lv2core#Plugin
+#define LV2_CORE__PluginBase         LV2_CORE_PREFIX "PluginBase"          ///< http://lv2plug.in/ns/lv2core#PluginBase
+#define LV2_CORE__Point              LV2_CORE_PREFIX "Point"               ///< http://lv2plug.in/ns/lv2core#Point
+#define LV2_CORE__Port               LV2_CORE_PREFIX "Port"                ///< http://lv2plug.in/ns/lv2core#Port
+#define LV2_CORE__PortProperty       LV2_CORE_PREFIX "PortProperty"        ///< http://lv2plug.in/ns/lv2core#PortProperty
+#define LV2_CORE__Resource           LV2_CORE_PREFIX "Resource"            ///< http://lv2plug.in/ns/lv2core#Resource
+#define LV2_CORE__ReverbPlugin       LV2_CORE_PREFIX "ReverbPlugin"        ///< http://lv2plug.in/ns/lv2core#ReverbPlugin
+#define LV2_CORE__ScalePoint         LV2_CORE_PREFIX "ScalePoint"          ///< http://lv2plug.in/ns/lv2core#ScalePoint
+#define LV2_CORE__SimulatorPlugin    LV2_CORE_PREFIX "SimulatorPlugin"     ///< http://lv2plug.in/ns/lv2core#SimulatorPlugin
+#define LV2_CORE__SpatialPlugin      LV2_CORE_PREFIX "SpatialPlugin"       ///< http://lv2plug.in/ns/lv2core#SpatialPlugin
+#define LV2_CORE__Specification      LV2_CORE_PREFIX "Specification"       ///< http://lv2plug.in/ns/lv2core#Specification
+#define LV2_CORE__SpectralPlugin     LV2_CORE_PREFIX "SpectralPlugin"      ///< http://lv2plug.in/ns/lv2core#SpectralPlugin
+#define LV2_CORE__UtilityPlugin      LV2_CORE_PREFIX "UtilityPlugin"       ///< http://lv2plug.in/ns/lv2core#UtilityPlugin
+#define LV2_CORE__WaveshaperPlugin   LV2_CORE_PREFIX "WaveshaperPlugin"    ///< http://lv2plug.in/ns/lv2core#WaveshaperPlugin
+#define LV2_CORE__appliesTo          LV2_CORE_PREFIX "appliesTo"           ///< http://lv2plug.in/ns/lv2core#appliesTo
+#define LV2_CORE__binary             LV2_CORE_PREFIX "binary"              ///< http://lv2plug.in/ns/lv2core#binary
+#define LV2_CORE__connectionOptional LV2_CORE_PREFIX "connectionOptional"  ///< http://lv2plug.in/ns/lv2core#connectionOptional
+#define LV2_CORE__control            LV2_CORE_PREFIX "control"             ///< http://lv2plug.in/ns/lv2core#control
+#define LV2_CORE__default            LV2_CORE_PREFIX "default"             ///< http://lv2plug.in/ns/lv2core#default
+#define LV2_CORE__designation        LV2_CORE_PREFIX "designation"         ///< http://lv2plug.in/ns/lv2core#designation
+#define LV2_CORE__documentation      LV2_CORE_PREFIX "documentation"       ///< http://lv2plug.in/ns/lv2core#documentation
+#define LV2_CORE__enumeration        LV2_CORE_PREFIX "enumeration"         ///< http://lv2plug.in/ns/lv2core#enumeration
+#define LV2_CORE__extensionData      LV2_CORE_PREFIX "extensionData"       ///< http://lv2plug.in/ns/lv2core#extensionData
+#define LV2_CORE__freeWheeling       LV2_CORE_PREFIX "freeWheeling"        ///< http://lv2plug.in/ns/lv2core#freeWheeling
+#define LV2_CORE__hardRTCapable      LV2_CORE_PREFIX "hardRTCapable"       ///< http://lv2plug.in/ns/lv2core#hardRTCapable
+#define LV2_CORE__inPlaceBroken      LV2_CORE_PREFIX "inPlaceBroken"       ///< http://lv2plug.in/ns/lv2core#inPlaceBroken
+#define LV2_CORE__index              LV2_CORE_PREFIX "index"               ///< http://lv2plug.in/ns/lv2core#index
+#define LV2_CORE__integer            LV2_CORE_PREFIX "integer"             ///< http://lv2plug.in/ns/lv2core#integer
+#define LV2_CORE__isLive             LV2_CORE_PREFIX "isLive"              ///< http://lv2plug.in/ns/lv2core#isLive
+#define LV2_CORE__latency            LV2_CORE_PREFIX "latency"             ///< http://lv2plug.in/ns/lv2core#latency
+#define LV2_CORE__maximum            LV2_CORE_PREFIX "maximum"             ///< http://lv2plug.in/ns/lv2core#maximum
+#define LV2_CORE__microVersion       LV2_CORE_PREFIX "microVersion"        ///< http://lv2plug.in/ns/lv2core#microVersion
+#define LV2_CORE__minimum            LV2_CORE_PREFIX "minimum"             ///< http://lv2plug.in/ns/lv2core#minimum
+#define LV2_CORE__minorVersion       LV2_CORE_PREFIX "minorVersion"        ///< http://lv2plug.in/ns/lv2core#minorVersion
+#define LV2_CORE__name               LV2_CORE_PREFIX "name"                ///< http://lv2plug.in/ns/lv2core#name
+#define LV2_CORE__optionalFeature    LV2_CORE_PREFIX "optionalFeature"     ///< http://lv2plug.in/ns/lv2core#optionalFeature
+#define LV2_CORE__port               LV2_CORE_PREFIX "port"                ///< http://lv2plug.in/ns/lv2core#port
+#define LV2_CORE__portProperty       LV2_CORE_PREFIX "portProperty"        ///< http://lv2plug.in/ns/lv2core#portProperty
+#define LV2_CORE__project            LV2_CORE_PREFIX "project"             ///< http://lv2plug.in/ns/lv2core#project
+#define LV2_CORE__prototype          LV2_CORE_PREFIX "prototype"           ///< http://lv2plug.in/ns/lv2core#prototype
+#define LV2_CORE__reportsLatency     LV2_CORE_PREFIX "reportsLatency"      ///< http://lv2plug.in/ns/lv2core#reportsLatency
+#define LV2_CORE__requiredFeature    LV2_CORE_PREFIX "requiredFeature"     ///< http://lv2plug.in/ns/lv2core#requiredFeature
+#define LV2_CORE__sampleRate         LV2_CORE_PREFIX "sampleRate"          ///< http://lv2plug.in/ns/lv2core#sampleRate
+#define LV2_CORE__scalePoint         LV2_CORE_PREFIX "scalePoint"          ///< http://lv2plug.in/ns/lv2core#scalePoint
+#define LV2_CORE__symbol             LV2_CORE_PREFIX "symbol"              ///< http://lv2plug.in/ns/lv2core#symbol
+#define LV2_CORE__toggled            LV2_CORE_PREFIX "toggled"             ///< http://lv2plug.in/ns/lv2core#toggled
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+   Plugin Instance Handle.
+
+   This is a handle for one particular instance of a plugin.  It is valid to
+   compare to NULL (or 0 for C++) but otherwise the host MUST NOT attempt to
+   interpret it.
+*/
+typedef void * LV2_Handle;
+
+/**
+   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.
+*/
+typedef struct _LV2_Feature {
+	/**
+	   A globally unique, case-sensitive identifier (URI) for this feature.
+
+	   This MUST be a valid URI string as defined by RFC 3986.
+	*/
+	const char * URI;
+
+	/**
+	   Pointer to arbitrary data.
+
+	   The format of this data is defined by the extension which describes the
+	   feature with the given `URI`.
+	*/
+	void * data;
+} LV2_Feature;
+
+/**
+   Plugin Descriptor.
+
+   This structure provides the core functions necessary to instantiate and use
+   a plugin.
+*/
+typedef struct _LV2_Descriptor {
+	/**
+	   A globally unique, case-sensitive identifier for this plugin.
+
+	   This MUST be a valid URI string as defined by RFC 3986.  All plugins with
+	   the same URI MUST be compatible to some degree, see
+	   http://lv2plug.in/ns/lv2core for details.
+	*/
+	const char * URI;
+
+	/**
+	   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 descriptor Descriptor of the plugin to instantiate.
+
+	   @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.
+
+	   @return A handle for the new plugin instance, or NULL if instantiation
+	   has failed.
+	*/
+	LV2_Handle (*instantiate)(const struct _LV2_Descriptor * descriptor,
+	                          double                         sample_rate,
+	                          const char *                   bundle_path,
+	                          const LV2_Feature *const *     features);
+
+	/**
+	   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 instance Plugin instance containing the port.
+
+	   @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)(LV2_Handle instance,
+	                     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)(LV2_Handle instance);
+
+	/**
+	   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 instance Instance to be run.
+
+	   @param sample_count The block size (in samples) for which the plugin
+	   instance must run.
+	*/
+	void (*run)(LV2_Handle instance,
+	            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)(LV2_Handle instance);
+
+	/**
+	   Clean up a plugin instance (counterpart to instantiate()).
+
+	   Once an instance of a plugin has been finished with it must be deleted
+	   using this function. The instance handle passed ceases to be valid after
+	   this call.
+
+	   If activate() was called for a plugin instance then a corresponding call
+	   to deactivate() MUST be made before cleanup() is called. Hosts MUST NOT
+	   call cleanup() unless instantiate() was previously called.
+	*/
+	void (*cleanup)(LV2_Handle instance);
+
+	/**
+	   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.
+	*/
+	const void * (*extension_data)(const char * uri);
+} LV2_Descriptor;
+
+/**
+   Helper macro needed for LV2_SYMBOL_EXPORT when using C++.
+*/
+#ifdef __cplusplus
+#    define LV2_SYMBOL_EXTERN extern "C"
+#else
+#    define LV2_SYMBOL_EXTERN
+#endif
+
+/**
+   Put this (LV2_SYMBOL_EXPORT) before any functions that are to be loaded
+   by the host as a symbol from the dynamic library.
+*/
+#if defined(__EMSCRIPTEN__)
+#    define LV2_SYMBOL_EXPORT LV2_SYMBOL_EXTERN __attribute__((used))
+#elif defined(_WIN32)
+#    define LV2_SYMBOL_EXPORT LV2_SYMBOL_EXTERN __declspec(dllexport)
+#else
+#    define LV2_SYMBOL_EXPORT LV2_SYMBOL_EXTERN __attribute__((visibility("default")))
+#endif
+
+/**
+   Prototype for plugin accessor function.
+
+   Plugins are discovered by hosts using RDF data (not by loading libraries).
+   See http://lv2plug.in for details on the discovery process, though most
+   hosts should use an existing library to implement this functionality.
+
+   This is the simple plugin discovery API, suitable for most statically
+   defined plugins.  Advanced plugins that need access to their bundle during
+   discovery can use lv2_lib_descriptor() instead.  Plugin libraries MUST
+   include a function called "lv2_descriptor" or "lv2_lib_descriptor" with
+   C-style linkage, but SHOULD provide "lv2_descriptor" wherever possible.
+
+   When it is time to load a plugin (designated by its URI), the host loads the
+   plugin's library, gets the lv2_descriptor() function from it, and uses this
+   function to find the LV2_Descriptor for the desired plugin.  Plugins are
+   accessed by index using values from 0 upwards.  This function MUST return
+   NULL for out of range indices, so the host can enumerate plugins by
+   increasing `index` until NULL is returned.
+
+   Note that `index` has no meaning, hosts MUST NOT depend on it remaining
+   consistent between loads of the plugin library.
+*/
+LV2_SYMBOL_EXPORT
+const LV2_Descriptor * lv2_descriptor(uint32_t index);
+
+/**
+   Type of the lv2_descriptor() function in a library (old discovery API).
+*/
+typedef const LV2_Descriptor *
+(*LV2_Descriptor_Function)(uint32_t index);
+
+/**
+   Handle for a library descriptor.
+*/
+typedef void* LV2_Lib_Handle;
+
+/**
+   Descriptor for a plugin library.
+
+   To access a plugin library, the host creates an LV2_Lib_Descriptor via the
+   lv2_lib_descriptor() function in the shared object.
+*/
+typedef struct {
+	/**
+	   Opaque library data which must be passed as the first parameter to all
+	   the methods of this struct.
+	*/
+	LV2_Lib_Handle handle;
+
+	/**
+	   The total size of this struct.  This allows for this struct to be
+	   expanded in the future if necessary.  This MUST be set by the library to
+	   sizeof(LV2_Lib_Descriptor).  The host MUST NOT access any fields of this
+	   struct beyond get_plugin() unless this field indicates they are present.
+	*/
+	uint32_t size;
+
+	/**
+	   Destroy this library descriptor and free all related resources.
+	*/
+	void (*cleanup)(LV2_Lib_Handle handle);
+
+	/**
+	   Plugin accessor.
+
+	   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)(LV2_Lib_Handle handle,
+	                                     uint32_t       index);
+} LV2_Lib_Descriptor;
+
+/**
+   Prototype for library accessor function.
+
+   This is the more advanced discovery API, which allows plugin libraries to
+   access their bundles during discovery, which makes it possible for plugins to
+   be dynamically defined by files in their bundle.  This API also has an
+   explicit cleanup function, removing any need for non-portable shared library
+   destructors.  Simple plugins that do not require these features may use
+   lv2_descriptor() instead.
+
+   This is the entry point for a plugin library.  Hosts load this symbol from
+   the library and call this function to obtain a library descriptor which can
+   be used to access all the contained plugins.  The returned object must not
+   be destroyed (using LV2_Lib_Descriptor::cleanup()) until all plugins loaded
+   from that library have been destroyed.
+*/
+LV2_SYMBOL_EXPORT
+const LV2_Lib_Descriptor *
+lv2_lib_descriptor(const char *               bundle_path,
+                   const LV2_Feature *const * features);
+
+/**
+   Type of the lv2_lib_descriptor() function in an LV2 library.
+*/
+typedef const LV2_Lib_Descriptor *
+(*LV2_Lib_Descriptor_Function)(const char *               bundle_path,
+                               const LV2_Feature *const * features);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LV2_H_INCLUDED */
+
+/**
+   @}
+*/