Add MidiThrough example plugin

Makefile

@@ -19,6 +19,7 @@ plugins: libs
 	$(MAKE) all -C plugins/Info
 	$(MAKE) all -C plugins/Latency
 	$(MAKE) all -C plugins/Meters
+	$(MAKE) all -C plugins/MidiThrough
 	$(MAKE) all -C plugins/Parameters
 	$(MAKE) all -C plugins/States
 
@@ -41,6 +42,7 @@ endif
 	$(MAKE) clean -C plugins/Info
 	$(MAKE) clean -C plugins/Latency
 	$(MAKE) clean -C plugins/Meters
+	$(MAKE) clean -C plugins/MidiThrough
 	$(MAKE) clean -C plugins/Parameters
 	$(MAKE) clean -C plugins/States
 

plugins/MidiThrough/DistrhoPluginInfo.h

@@ -0,0 +1,31 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2018 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.
+ */
+
+#ifndef DISTRHO_PLUGIN_INFO_H_INCLUDED
+#define DISTRHO_PLUGIN_INFO_H_INCLUDED
+
+#define DISTRHO_PLUGIN_BRAND "DISTRHO"
+#define DISTRHO_PLUGIN_NAME  "MidiThrough"
+#define DISTRHO_PLUGIN_URI   "http://distrho.sf.net/examples/MidiThrough"
+
+#define DISTRHO_PLUGIN_HAS_UI           0
+#define DISTRHO_PLUGIN_IS_RT_SAFE       1
+#define DISTRHO_PLUGIN_NUM_INPUTS       0
+#define DISTRHO_PLUGIN_NUM_OUTPUTS      0
+#define DISTRHO_PLUGIN_WANT_MIDI_INPUT  1
+#define DISTRHO_PLUGIN_WANT_MIDI_OUTPUT 1
+
+#endif // DISTRHO_PLUGIN_INFO_H_INCLUDED

plugins/MidiThrough/Makefile

@@ -0,0 +1,35 @@
+#!/usr/bin/make -f
+# Makefile for DISTRHO Plugins #
+# ---------------------------- #
+# Created by falkTX
+#
+
+# --------------------------------------------------------------
+# Project name, used for binaries
+
+NAME = d_midiThrough
+
+# --------------------------------------------------------------
+# Files to build
+
+OBJS_DSP = \
+	MidiThroughExamplePlugin.cpp.o
+
+# --------------------------------------------------------------
+# Do some magic
+
+include ../Makefile.mk
+
+# --------------------------------------------------------------
+# Enable all possible plugin types
+
+ifeq ($(LINUX),true)
+TARGETS += jack
+endif
+
+TARGETS += lv2_dsp
+TARGETS += vst
+
+all: $(TARGETS)
+
+# --------------------------------------------------------------

plugins/MidiThrough/MidiThroughExamplePlugin.cpp

@@ -0,0 +1,137 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2018 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 "DistrhoPlugin.hpp"
+
+START_NAMESPACE_DISTRHO
+
+// -----------------------------------------------------------------------------------------------------------
+
+/**
+  Plugin that demonstrates the latency API in DPF.
+ */
+class MidiThroughExamplePlugin : public Plugin
+{
+public:
+    MidiThroughExamplePlugin()
+        : Plugin(0, 0, 0) {}
+
+protected:
+   /* --------------------------------------------------------------------------------------------------------
+    * Information */
+
+   /**
+      Get the plugin label.
+      This label is a short restricted name consisting of only _, a-z, A-Z and 0-9 characters.
+    */
+    const char* getLabel() const override
+    {
+        return "MidiThrough";
+    }
+
+   /**
+      Get an extensive comment/description about the plugin.
+    */
+    const char* getDescription() const override
+    {
+        return "Plugin that demonstrates the latency API in DPF.";
+    }
+
+   /**
+      Get the plugin author/maker.
+    */
+    const char* getMaker() const override
+    {
+        return "DISTRHO";
+    }
+
+   /**
+      Get the plugin homepage.
+    */
+    const char* getHomePage() const override
+    {
+        return "https://github.com/DISTRHO/plugin-examples";
+    }
+
+   /**
+      Get the plugin license name (a single line of text).
+      For commercial plugins this should return some short copyright information.
+    */
+    const char* getLicense() const override
+    {
+        return "ISC";
+    }
+
+   /**
+      Get the plugin version, in hexadecimal.
+    */
+    uint32_t getVersion() const override
+    {
+        return d_version(1, 0, 0);
+    }
+
+   /**
+      Get the plugin unique Id.
+      This value is used by LADSPA, DSSI and VST plugin formats.
+    */
+    int64_t getUniqueId() const override
+    {
+        return d_cconst('d', 'M', 'T', 'r');
+    }
+
+   /* --------------------------------------------------------------------------------------------------------
+    * Init and Internal data, unused in this plugin */
+
+    void  initParameter(uint32_t, Parameter&) override {}
+    float getParameterValue(uint32_t) const   override { return 0.0f;}
+    void  setParameterValue(uint32_t, float)  override {}
+
+   /* --------------------------------------------------------------------------------------------------------
+    * Audio/MIDI Processing */
+
+   /**
+      Run/process function for plugins with MIDI input.
+      In this case we just pass-through all MIDI events.
+    */
+    void run(const float**, float**, uint32_t,
+             const MidiEvent* midiEvents, uint32_t midiEventCount) override
+    {
+        for (uint32_t i=0; i<midiEventCount; ++i)
+            writeMidiEvent(midiEvents[i]);
+    }
+
+    // -------------------------------------------------------------------------------------------------------
+
+private:
+    // nothing here :)
+
+   /**
+      Set our plugin class as non-copyable and add a leak detector just in case.
+    */
+    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(MidiThroughExamplePlugin)
+};
+
+/* ------------------------------------------------------------------------------------------------------------
+ * Plugin entry point, called by DPF to create a new plugin instance. */
+
+Plugin* createPlugin()
+{
+    return new MidiThroughExamplePlugin();
+}
+
+// -----------------------------------------------------------------------------------------------------------
+
+END_NAMESPACE_DISTRHO

plugins/MidiThrough/README.md

@@ -0,0 +1,6 @@
+# MidiThrough example
+
+This example will show how to use MIDI output in DPF based plugins.<br/>
+
+It simply calls writeMidiEvent() in its process function for every event it receives.
+