From e360047054117d63fb579ec9231e9dc77c99f12a Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 8 Aug 2008 22:45:58 +0000
Subject: Add preliminary (library side only) LV2 port of MDA (open-sourced VST
 plugins).

git-svn-id: http://svn.drobilla.net/lad/mda-lv2@1321 a436a847-0d15-0410-975c-d299462d15a1
---
 lvz/wrapper.cpp | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 lvz/wrapper.cpp

(limited to 'lvz/wrapper.cpp')

diff --git a/lvz/wrapper.cpp b/lvz/wrapper.cpp
new file mode 100644
index 0000000..5916b13
--- /dev/null
+++ b/lvz/wrapper.cpp
@@ -0,0 +1,115 @@
+/* LVZ - A C++ interface for writing LV2 plugins.
+ * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
+ *  
+ * This library 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.
+ *
+ * This library 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 General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef PLUGIN_URI
+#error "This file requires PLUGIN_URI to be defined"
+#endif
+
+#ifndef PLUGIN_CLASS
+#error "This file requires PLUGIN_CLASS to be defined"
+#endif
+
+#include <stdlib.h>
+#include "audioeffectx.h"
+#include "lv2.h"
+#include PLUGIN_HEADER
+
+extern "C" {
+
+/* Plugin */
+
+typedef struct {
+	PLUGIN_CLASS* effect;
+	float**       inputs;
+	float**       outputs;
+} MDAPlugin;
+
+
+static void mda_cleanup(LV2_Handle instance)
+{
+	free(instance);
+}
+
+
+static void mda_connect_port(LV2_Handle instance, uint32_t port, void* data)
+{
+	MDAPlugin* plugin = (MDAPlugin*)instance;
+	plugin->effect->setParameter(port, *(float*)data);
+}
+
+
+static LV2_Handle
+mda_instantiate(const LV2_Descriptor*    descriptor,
+                double                   rate,
+                const char*              bundle_path,
+                const LV2_Feature*const* features)
+{
+	PLUGIN_CLASS* effect = new PLUGIN_CLASS(NULL);
+	effect->setSampleRate(rate);
+	
+	MDAPlugin* plugin = (MDAPlugin*)malloc(sizeof(MDAPlugin));
+	plugin->effect = effect;
+	plugin->inputs = (float**)malloc(sizeof(float*) * effect->getNumInputs());
+	plugin->outputs = (float**)malloc(sizeof(float*) * effect->getNumOutputs());
+
+	return (LV2_Handle)plugin;
+}
+
+
+static void
+mda_run(LV2_Handle instance, uint32_t sample_count)
+{
+	MDAPlugin* plugin = (MDAPlugin*)instance;
+	plugin->effect->process(plugin->inputs, plugin->outputs, sample_count);
+}
+
+/* Library */
+
+static LV2_Descriptor *mda_descriptor = NULL;
+
+static void
+init_descriptor()
+{
+	mda_descriptor = (LV2_Descriptor*)malloc(sizeof(LV2_Descriptor));
+
+	mda_descriptor->URI = PLUGIN_URI;
+	mda_descriptor->activate = NULL;
+	mda_descriptor->cleanup = mda_cleanup;
+	mda_descriptor->connect_port = mda_connect_port;
+	mda_descriptor->deactivate = NULL;
+	mda_descriptor->instantiate = mda_instantiate;
+	mda_descriptor->run = mda_run;
+}
+
+
+LV2_SYMBOL_EXPORT
+const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	if (!mda_descriptor)
+		init_descriptor();
+
+	switch (index) {
+	case 0:
+		return mda_descriptor;
+	default:
+		return NULL;
+	}
+}
+
+} // extern "C"
-- 
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