git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

subrepo:
  subdir:   "deps/juce"
  merged:   "b13f9084e"
upstream:
  origin:   "https://github.com/essej/JUCE.git"
  branch:   "sono6good"
  commit:   "b13f9084e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

deps/juce/modules/juce_audio_basics/utilities/juce_SmoothedValue.cpp

@@ -0,0 +1,92 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   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.
+
+   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
+{
+
+#if JUCE_UNIT_TESTS
+
+static CommonSmoothedValueTests <SmoothedValue<float, ValueSmoothingTypes::Linear>> commonLinearSmoothedValueTests;
+static CommonSmoothedValueTests <SmoothedValue<float, ValueSmoothingTypes::Multiplicative>> commonMultiplicativeSmoothedValueTests;
+
+class SmoothedValueTests  : public UnitTest
+{
+public:
+    SmoothedValueTests()
+        : UnitTest ("SmoothedValueTests", UnitTestCategories::smoothedValues)
+    {}
+
+    void runTest() override
+    {
+        beginTest ("Linear moving target");
+        {
+            SmoothedValue<float, ValueSmoothingTypes::Linear> sv;
+
+            sv.reset (12);
+            float initialValue = 0.0f;
+            sv.setCurrentAndTargetValue (initialValue);
+            sv.setTargetValue (1.0f);
+
+            auto delta = sv.getNextValue() - initialValue;
+
+            sv.skip (6);
+
+            auto newInitialValue = sv.getCurrentValue();
+            sv.setTargetValue (newInitialValue + 2.0f);
+            auto doubleDelta = sv.getNextValue() - newInitialValue;
+
+            expectWithinAbsoluteError (doubleDelta, delta * 2.0f, 1.0e-7f);
+        }
+
+        beginTest ("Multiplicative curve");
+        {
+            SmoothedValue<double, ValueSmoothingTypes::Multiplicative> sv;
+
+            auto numSamples = 12;
+            AudioBuffer<double> values (2, numSamples + 1);
+
+            sv.reset (numSamples);
+            sv.setCurrentAndTargetValue (1.0);
+            sv.setTargetValue (2.0f);
+
+            values.setSample (0, 0, sv.getCurrentValue());
+
+            for (int i = 1; i < values.getNumSamples(); ++i)
+                values.setSample (0, i, sv.getNextValue());
+
+            sv.setTargetValue (1.0f);
+            values.setSample (1, values.getNumSamples() - 1, sv.getCurrentValue());
+
+            for (int i = values.getNumSamples() - 2; i >= 0 ; --i)
+                values.setSample (1, i, sv.getNextValue());
+
+            for (int i = 0; i < values.getNumSamples(); ++i)
+                expectWithinAbsoluteError (values.getSample (0, i), values.getSample (1, i), 1.0e-9);
+        }
+    }
+};
+
+static SmoothedValueTests smoothedValueTests;
+
+#endif
+
+} // namespace juce