OpenShot Audio Library | OpenShotAudio  0.3.3
juce_SmoothedValue.cpp
1 /*
2  ==============================================================================
3 
4  This file is part of the JUCE library.
5  Copyright (c) 2018 - ROLI Ltd.
6 
7  JUCE is an open source library subject to commercial or open-source
8  licensing.
9 
10  The code included in this file is provided under the terms of the ISC license
11  http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12  To use, copy, modify, and/or distribute this software for any purpose with or
13  without fee is hereby granted provided that the above copyright notice and
14  this permission notice appear in all copies.
15 
16  JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17  EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18  DISCLAIMED.
19 
20  ==============================================================================
21 */
22 
23 namespace juce
24 {
25 
26 #if JUCE_UNIT_TESTS
27 
28 static CommonSmoothedValueTests <SmoothedValue<float, ValueSmoothingTypes::Linear>> commonLinearSmoothedValueTests;
29 static CommonSmoothedValueTests <SmoothedValue<float, ValueSmoothingTypes::Multiplicative>> commonMultiplicativeSmoothedValueTests;
30 
31 class SmoothedValueTests : public UnitTest
32 {
33 public:
34  SmoothedValueTests()
35  : UnitTest ("SmoothedValueTests", UnitTestCategories::smoothedValues)
36  {}
37 
38  void runTest() override
39  {
40  beginTest ("Linear moving target");
41  {
42  SmoothedValue<float, ValueSmoothingTypes::Linear> sv;
43 
44  sv.reset (12);
45  float initialValue = 0.0f;
46  sv.setCurrentAndTargetValue (initialValue);
47  sv.setTargetValue (1.0f);
48 
49  auto delta = sv.getNextValue() - initialValue;
50 
51  sv.skip (6);
52 
53  auto newInitialValue = sv.getCurrentValue();
54  sv.setTargetValue (newInitialValue + 2.0f);
55  auto doubleDelta = sv.getNextValue() - newInitialValue;
56 
57  expectWithinAbsoluteError (doubleDelta, delta * 2.0f, 1.0e-7f);
58  }
59 
60  beginTest ("Multiplicative curve");
61  {
62  SmoothedValue<double, ValueSmoothingTypes::Multiplicative> sv;
63 
64  auto numSamples = 12;
65  AudioBuffer<double> values (2, numSamples + 1);
66 
67  sv.reset (numSamples);
68  sv.setCurrentAndTargetValue (1.0);
69  sv.setTargetValue (2.0f);
70 
71  values.setSample (0, 0, sv.getCurrentValue());
72 
73  for (int i = 1; i < values.getNumSamples(); ++i)
74  values.setSample (0, i, sv.getNextValue());
75 
76  sv.setTargetValue (1.0f);
77  values.setSample (1, values.getNumSamples() - 1, sv.getCurrentValue());
78 
79  for (int i = values.getNumSamples() - 2; i >= 0 ; --i)
80  values.setSample (1, i, sv.getNextValue());
81 
82  for (int i = 0; i < values.getNumSamples(); ++i)
83  expectWithinAbsoluteError (values.getSample (0, i), values.getSample (1, i), 1.0e-9);
84  }
85  }
86 };
87 
88 static SmoothedValueTests smoothedValueTests;
89 
90 #endif
91 
92 } // namespace juce