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_audio_processors/utilities/juce_AudioParameterFloat.h

@@ -0,0 +1,111 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+/**
+    A subclass of AudioProcessorParameter that provides an easy way to create a
+    parameter which maps onto a given NormalisableRange.
+
+    @see AudioParameterInt, AudioParameterBool, AudioParameterChoice
+
+    @tags{Audio}
+*/
+class JUCE_API  AudioParameterFloat  : public AudioProcessorParameterWithID
+{
+public:
+    /** Creates a AudioParameterFloat with the specified parameters.
+
+        @param parameterID         The parameter ID to use
+        @param name                The parameter name to use
+        @param normalisableRange   The NormalisableRange to use
+        @param defaultValue        The non-normalised default value
+        @param label               An optional label for the parameter's value
+        @param category            An optional parameter category
+        @param stringFromValue     An optional lambda function that converts a non-normalised
+                                   value to a string with a maximum length. This may
+                                   be used by hosts to display the parameter's value.
+        @param valueFromString     An optional lambda function that parses a string and
+                                   converts it into a non-normalised value. Some hosts use
+                                   this to allow users to type in parameter values.
+    */
+    AudioParameterFloat (const String& parameterID, const String& name,
+                         NormalisableRange<float> normalisableRange,
+                         float defaultValue,
+                         const String& label = String(),
+                         Category category = AudioProcessorParameter::genericParameter,
+                         std::function<String (float value, int maximumStringLength)> stringFromValue = nullptr,
+                         std::function<float (const String& text)> valueFromString = nullptr);
+
+    /** Creates a AudioParameterFloat with an ID, name, and range.
+        On creation, its value is set to the default value.
+        For control over skew factors, you can use the other
+        constructor and provide a NormalisableRange.
+    */
+    AudioParameterFloat (String parameterID, String name,
+                         float minValue,
+                         float maxValue,
+                         float defaultValue);
+
+    /** Destructor. */
+    ~AudioParameterFloat();
+
+    /** Returns the parameter's current value. */
+    float get() const noexcept                  { return value; }
+    /** Returns the parameter's current value. */
+    operator float() const noexcept             { return value; }
+
+    /** Changes the parameter's current value. */
+    AudioParameterFloat& operator= (float newValue);
+
+    /** Provides access to the parameter's range. */
+    NormalisableRange<float> range;
+
+protected:
+    /** Override this method if you are interested in receiving callbacks
+        when the parameter value changes.
+    */
+    virtual void valueChanged (float newValue);
+
+private:
+    //==============================================================================
+    float getValue() const override;
+    void setValue (float newValue) override;
+    float getDefaultValue() const override;
+    int getNumSteps() const override;
+    String getText (float, int) const override;
+    float getValueForText (const String&) const override;
+
+    float value;
+    const float defaultValue;
+    std::function<String (float, int)> stringFromValueFunction;
+    std::function<float (const String&)> valueFromStringFunction;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioParameterFloat)
+};
+
+} // namespace juce