Add all PIP examples

examples/Plugins/ArpeggiatorPluginDemo.h

@@ -0,0 +1,164 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE examples.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. 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" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
+   WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
+   PURPOSE, ARE DISCLAIMED.
+
+  ==============================================================================
+*/
+
+/*******************************************************************************
+ The block below describes the properties of this PIP. A PIP is a short snippet
+ of code that can be read by the Projucer and used to generate a JUCE project.
+
+ BEGIN_JUCE_PIP_METADATA
+
+ name:             ArpeggiatorPlugin
+ version:          1.0.0
+ vendor:           juce
+ website:          http://juce.com
+ description:      Arpeggiator audio plugin.
+
+ dependencies:     juce_audio_basics, juce_audio_devices, juce_audio_formats,
+                   juce_audio_plugin_client, juce_audio_processors,
+                   juce_audio_utils, juce_core, juce_data_structures,
+                   juce_events, juce_graphics, juce_gui_basics, juce_gui_extra
+ exporters:        xcode_mac, vs2017
+
+ type:             AudioProcessor
+ mainClass:        Arpeggiator
+
+ useLocalCopy:     1
+
+ END_JUCE_PIP_METADATA
+
+*******************************************************************************/
+
+#pragma once
+
+
+//==============================================================================
+class Arpeggiator  : public AudioProcessor
+{
+public:
+
+    //==============================================================================
+    Arpeggiator()
+        : AudioProcessor (BusesProperties()) // add no audio buses at all
+    {
+        addParameter (speed = new AudioParameterFloat ("speed", "Arpeggiator Speed", 0.0, 1.0, 0.5));
+    }
+
+    ~Arpeggiator() {}
+
+    //==============================================================================
+    void prepareToPlay (double sampleRate, int samplesPerBlock) override
+    {
+        ignoreUnused (samplesPerBlock);
+
+        notes.clear();
+        currentNote = 0;
+        lastNoteValue = -1;
+        time = 0.0;
+        rate = static_cast<float> (sampleRate);
+    }
+
+    void releaseResources() override {}
+
+    void processBlock (AudioBuffer<float>& buffer, MidiBuffer& midi) override
+    {
+        // the audio buffer in a midi effect will have zero channels!
+        jassert (buffer.getNumChannels() == 0);
+
+        // however we use the buffer to get timing information
+        auto numSamples = buffer.getNumSamples();
+
+        // get note duration
+        auto noteDuration = static_cast<int> (std::ceil (rate * 0.25f * (0.1f + (1.0f - (*speed)))));
+
+        MidiMessage msg;
+        int ignore;
+
+        for (MidiBuffer::Iterator it (midi); it.getNextEvent (msg, ignore);)
+        {
+            if      (msg.isNoteOn())  notes.add (msg.getNoteNumber());
+            else if (msg.isNoteOff()) notes.removeValue (msg.getNoteNumber());
+        }
+
+        midi.clear();
+
+        if ((time + numSamples) >= noteDuration)
+        {
+            auto offset = jmax (0, jmin ((int) (noteDuration - time), numSamples - 1));
+
+            if (lastNoteValue > 0)
+            {
+                midi.addEvent (MidiMessage::noteOff (1, lastNoteValue), offset);
+                lastNoteValue = -1;
+            }
+
+            if (notes.size() > 0)
+            {
+                currentNote = (currentNote + 1) % notes.size();
+                lastNoteValue = notes[currentNote];
+                midi.addEvent (MidiMessage::noteOn  (1, lastNoteValue, (uint8) 127), offset);
+            }
+
+        }
+
+        time = (time + numSamples) % noteDuration;
+    }
+
+    //==============================================================================
+    bool isMidiEffect() const override                     { return true; }
+
+    //==============================================================================
+    AudioProcessorEditor* createEditor() override          { return new GenericAudioProcessorEditor (this); }
+    bool hasEditor() const override                        { return true; }
+
+    //==============================================================================
+    const String getName() const override                  { return "Arpeggiator"; }
+
+    bool acceptsMidi() const override                      { return true; }
+    bool producesMidi() const override                     { return true; }
+    double getTailLengthSeconds() const override           { return 0; }
+
+    //==============================================================================
+    int getNumPrograms() override                          { return 1; }
+    int getCurrentProgram() override                       { return 0; }
+    void setCurrentProgram (int) override                  {}
+    const String getProgramName (int) override             { return {}; }
+    void changeProgramName (int, const String&) override   {}
+
+    //==============================================================================
+    void getStateInformation (MemoryBlock& destData) override
+    {
+        MemoryOutputStream (destData, true).writeFloat (*speed);
+    }
+
+    void setStateInformation (const void* data, int sizeInBytes) override
+    {
+        speed->setValueNotifyingHost (MemoryInputStream (data, static_cast<size_t> (sizeInBytes), false).readFloat());
+    }
+
+private:
+    //==============================================================================
+    AudioParameterFloat* speed;
+    int currentNote, lastNoteValue;
+    int time;
+    float rate;
+    SortedSet<int> notes;
+
+    //==============================================================================
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Arpeggiator)
+};