fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).

modules/juce_dsp/processors/juce_Reverb.h

@@ -0,0 +1,117 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
+   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
+   27th April 2017).
+
+   End User License Agreement: www.juce.com/juce-5-licence
+   Privacy Policy: www.juce.com/juce-5-privacy-policy
+
+   Or: You may also use this code under the terms of the GPL v3 (see
+   www.gnu.org/licenses).
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+namespace dsp
+{
+
+/**
+    Processor wrapper around juce::Reverb for easy integration into ProcessorChain.
+
+    @tags{DSP}
+*/
+class Reverb
+{
+public:
+    //==============================================================================
+    /** Creates an uninitialised Reverb processor. Call prepare() before first use. */
+    Reverb()
+    {}
+
+    //==============================================================================
+    using Parameters = juce::Reverb::Parameters;
+
+    /** Returns the reverb's current parameters. */
+    const Parameters& getParameters() const noexcept    { return reverb.getParameters(); }
+
+    /** Applies a new set of parameters to the reverb.
+        Note that this doesn't attempt to lock the reverb, so if you call this in parallel with
+        the process method, you may get artifacts.
+    */
+    void setParameters (const Parameters& newParams)    { reverb.setParameters (newParams); }
+
+    /** Returns true if the reverb is enabled. */
+    bool isEnabled() const noexcept                     { return enabled; }
+
+    /** Enables/disables the reverb. */
+    void setEnabled (bool newValue) noexcept            { enabled = newValue; }
+
+    //==============================================================================
+    /** Initialises the reverb. */
+    void prepare (const juce::dsp::ProcessSpec& spec)
+    {
+        reverb.setSampleRate (spec.sampleRate);
+    }
+
+    /** Resets the reverb's internal state. */
+    void reset() noexcept
+    {
+        reverb.reset();
+    }
+
+    //==============================================================================
+    /** Applies the reverb to a mono or stereo buffer. */
+    template <typename ProcessContext>
+    void process (const ProcessContext& context) noexcept
+    {
+        const auto& inputBlock = context.getInputBlock();
+        auto& outputBlock = context.getOutputBlock();
+        const auto numInChannels = inputBlock.getNumChannels();
+        const auto numOutChannels = outputBlock.getNumChannels();
+        const auto numSamples = outputBlock.getNumSamples();
+
+        jassert (inputBlock.getNumSamples() == numSamples);
+
+        outputBlock.copy (inputBlock);
+
+        if (! enabled || context.isBypassed)
+            return;
+
+        if (numInChannels == 1 && numOutChannels == 1)
+        {
+            reverb.processMono (outputBlock.getChannelPointer (0), (int) numSamples);
+        }
+        else if (numInChannels == 2 && numOutChannels == 2)
+        {
+            reverb.processStereo (outputBlock.getChannelPointer (0),
+                                  outputBlock.getChannelPointer (1),
+                                  (int) numSamples);
+        }
+        else
+        {
+            jassertfalse;   // invalid channel configuration
+        }
+    }
+
+private:
+    //==============================================================================
+    juce::Reverb reverb;
+    bool enabled = true;
+};
+
+} // namespace dsp
+} // namespace juce