--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/distrho/src/DistrhoPluginStub.cpp	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,97 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * 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.
+ *
+ * THE 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.
+ */
+
+#include "DistrhoPluginInternal.hpp"
+
+START_NAMESPACE_DISTRHO
+
+// --------------------------------------------------------------------------------------------------------------------
+
+#if ! DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
+static constexpr const writeMidiFunc writeMidiCallback = nullptr;
+#endif
+#if ! DISTRHO_PLUGIN_WANT_PARAMETER_VALUE_CHANGE_REQUEST
+static constexpr const requestParameterValueChangeFunc requestParameterValueChangeCallback = nullptr;
+#endif
+#if ! DISTRHO_PLUGIN_WANT_STATE
+static const updateStateValueFunc updateStateValueCallback = nullptr;
+#endif
+
+// --------------------------------------------------------------------------------------------------------------------
+
+/**
+ * Stub plugin class, does nothing but serving as example code for other implementations.
+ */
+class PluginStub
+{
+public:
+    PluginStub()
+        : fPlugin(this,
+                  writeMidiCallback,
+                  requestParameterValueChangeCallback,
+                  updateStateValueCallback)
+    {
+    }
+
+    // ----------------------------------------------------------------------------------------------------------------
+
+private:
+    // Plugin
+    PluginExporter fPlugin;
+
+    // ----------------------------------------------------------------------------------------------------------------
+    // DPF callbacks
+
+   #if DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
+    bool writeMidi(const MidiEvent&)
+    {
+        return true;
+    }
+
+    static bool writeMidiCallback(void* const ptr, const MidiEvent& midiEvent)
+    {
+        return ((PluginStub*)ptr)->writeMidi(midiEvent);
+    }
+   #endif
+
+   #if DISTRHO_PLUGIN_WANT_PARAMETER_VALUE_CHANGE_REQUEST
+    bool requestParameterValueChange(uint32_t, float)
+    {
+        return true;
+    }
+
+    static bool requestParameterValueChangeCallback(void* const ptr, const uint32_t index, const float value)
+    {
+        return ((PluginStub*)ptr)->requestParameterValueChange(index, value);
+    }
+   #endif
+
+   #if DISTRHO_PLUGIN_WANT_STATE
+    bool updateState(const char*, const char*)
+    {
+        return true;
+    }
+
+    static bool updateStateValueCallback(void* const ptr, const char* const key, const char* const value)
+    {
+        return ((PluginStub*)ptr)->updateState(key, value);
+    }
+   #endif
+};
+
+END_NAMESPACE_DISTRHO
+
+// --------------------------------------------------------------------------------------------------------------------