OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_Decibels.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
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//==============================================================================
32 class Decibels
33{
34 public:
35 //==============================================================================
41 template <typename Type>
42 static Type decibelsToGain (Type decibels,
43 Type minusInfinityDb = Type (defaultMinusInfinitydB))
44 {
45 return decibels > minusInfinityDb ? std::pow (Type (10.0), decibels * Type (0.05))
46 : Type();
47 }
48
55 template <typename Type>
56 static Type gainToDecibels (Type gain,
57 Type minusInfinityDb = Type (defaultMinusInfinitydB))
58 {
59 return gain > Type() ? jmax (minusInfinityDb, static_cast<Type> (std::log10 (gain)) * Type (20.0))
60 : minusInfinityDb;
61 }
62
67 template <typename Type>
68 static Type gainWithLowerBound (Type gain, Type lowerBoundDb)
69 {
70 // You probably want to use a negative decibel value or the gain will
71 // be restricted to boosting only!
72 jassert (lowerBoundDb < (Type) 0.0);
73
74 return jmax ((Type) gain, Decibels::decibelsToGain (lowerBoundDb, lowerBoundDb - (Type) 1.0));
75 }
76
77 //==============================================================================
85 template <typename Type>
86 static String toString (Type decibels,
87 int decimalPlaces = 2,
88 Type minusInfinityDb = Type (defaultMinusInfinitydB),
89 bool shouldIncludeSuffix = true,
90 StringRef customMinusInfinityString = {})
91 {
92 String s;
93 s.preallocateBytes (20);
94
95 if (decibels <= minusInfinityDb)
96 {
97 if (customMinusInfinityString.isEmpty())
98 s << "-INF";
99 else
100 s << customMinusInfinityString;
101 }
102 else
103 {
104 if (decibels >= Type())
105 s << '+';
106
107 if (decimalPlaces <= 0)
108 s << roundToInt (decibels);
109 else
110 s << String (decibels, decimalPlaces);
111 }
112
113 if (shouldIncludeSuffix)
114 s << " dB";
115
116 return s;
117 }
118
119 private:
120 //==============================================================================
121 enum { defaultMinusInfinitydB = -100 };
122
123 Decibels() = delete; // This class can't be instantiated, it's just a holder for static methods..
124};
125
126} // namespace juce
juce::Decibels
Definition juce_Decibels.h:33
juce::Decibels::gainWithLowerBound
static Type gainWithLowerBound(Type gain, Type lowerBoundDb)
Definition juce_Decibels.h:68
juce::Decibels::decibelsToGain
static Type decibelsToGain(Type decibels, Type minusInfinityDb=Type(defaultMinusInfinitydB))
Definition juce_Decibels.h:42
juce::Decibels::gainToDecibels
static Type gainToDecibels(Type gain, Type minusInfinityDb=Type(defaultMinusInfinitydB))
Definition juce_Decibels.h:56
juce::Decibels::toString
static String toString(Type decibels, int decimalPlaces=2, Type minusInfinityDb=Type(defaultMinusInfinitydB), bool shouldIncludeSuffix=true, StringRef customMinusInfinityString={})
Definition juce_Decibels.h:86
juce::StringRef
Definition juce_StringRef.h:62
juce::String
Definition juce_String.h:53
juce::String::preallocateBytes
void preallocateBytes(size_t numBytesNeeded)
Definition juce_String.cpp:284