Add LV2 plugin

ladspa-lv2/libmain-lv2.cpp

@@ -0,0 +1,37 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rubber Band Library
+    An audio time-stretching and pitch-shifting library.
+    Copyright 2007-2022 Particular Programs Ltd.
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+
+    Alternatively, if you have a valid commercial licence for the
+    Rubber Band Library obtained by agreement with the copyright
+    holders, you may redistribute and/or modify it under the terms
+    described in that licence.
+
+    If you wish to distribute code using the Rubber Band Library
+    under terms other than those of the GNU General Public License,
+    you must obtain a valid commercial licence before doing so.
+*/
+
+#define RB_PLUGIN_LV2 1
+#undef RB_PLUGIN_LADSPA
+#include "RubberBandPitchShifter.cpp"
+
+#include <stdio.h>
+
+extern "C" {
+
+const LV2_Descriptor *lv2_descriptor(uint32_t index)
+{
+    return RubberBandPitchShifter::getDescriptor(index);
+}
+
+}