upgrade to JUCE 5.4.3. Remove (probably) unused JUCE modules. Remove VST2 target (it's been end-of-life'd by Steinberg and by JUCE)

modules/juce_audio_basics/buffers/juce_AudioProcessLoadMeasurer.h

@@ -0,0 +1,96 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+//==============================================================================
+/**
+    Maintains an ongoing measurement of the proportion of time which is being
+    spent inside an audio callback.
+*/
+class JUCE_API  AudioProcessLoadMeasurer
+{
+public:
+    /** */
+    AudioProcessLoadMeasurer();
+
+    /** Destructor. */
+    ~AudioProcessLoadMeasurer();
+
+    //==============================================================================
+    /** Resets the state. */
+    void reset();
+
+    /** Resets the counter, in preparation for use with the given sample rate and block size. */
+    void reset (double sampleRate, int blockSize);
+
+    /** Returns the current load as a proportion 0 to 1.0 */
+    double getLoadAsProportion() const;
+
+    /** Returns the current load as a percentage 0 to 100.0 */
+    double getLoadAsPercentage() const;
+
+    /** Returns the number of over- (or under-) runs recorded since the state was reset. */
+    int getXRunCount() const;
+
+    //==============================================================================
+    /** This class measures the time between its construction and destruction and
+        adds it to an AudioProcessLoadMeasurer.
+
+        e.g.
+        @code
+        {
+            AudioProcessLoadMeasurer::ScopedTimer timer (myProcessLoadMeasurer);
+            myCallback->doTheCallback();
+        }
+        @endcode
+    */
+    struct JUCE_API  ScopedTimer
+    {
+        ScopedTimer (AudioProcessLoadMeasurer&);
+        ~ScopedTimer();
+
+    private:
+        AudioProcessLoadMeasurer& owner;
+        double startTime;
+
+        JUCE_DECLARE_NON_COPYABLE (ScopedTimer)
+    };
+
+    /** Can be called manually to add the time of a callback to the stats.
+        Normally you probably would never call this - it's simpler and more robust to
+        use a ScopedTimer to measure the time using an RAII pattern.
+    */
+    void registerBlockRenderTime (double millisecondsTaken);
+
+private:
+    double cpuUsageMs = 0, timeToCpuScale = 0, msPerBlock = 0;
+    int xruns = 0;
+};
+
+
+} // namespace juce