OpenShot Audio Library | OpenShotAudio 0.3.2

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juce_Decibels.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - 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//==============================================================================
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
63 //==============================================================================
71 template <typename Type>
72 static String toString (Type decibels,
73 int decimalPlaces = 2,
74 Type minusInfinityDb = Type (defaultMinusInfinitydB),
75 bool shouldIncludeSuffix = true,
76 StringRef customMinusInfinityString = {})
77 {
78 String s;
79 s.preallocateBytes (20);
80
81 if (decibels <= minusInfinityDb)
82 {
83 if (customMinusInfinityString.isEmpty())
84 s << "-INF";
85 else
86 s << customMinusInfinityString;
87 }
88 else
89 {
90 if (decibels >= Type())
91 s << '+';
92
93 if (decimalPlaces <= 0)
94 s << roundToInt (decibels);
95 else
96 s << String (decibels, decimalPlaces);
97 }
98
99 if (shouldIncludeSuffix)
100 s << " dB";
101
102 return s;
103 }
104
105 private:
106 //==============================================================================
107 enum { defaultMinusInfinitydB = -100 };
108
109 Decibels() = delete; // This class can't be instantiated, it's just a holder for static methods..
110};
111
112} // namespace juce
juce::Decibels
Definition: juce_Decibels.h:33
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:72
juce::StringRef
Definition: juce_StringRef.h:62
juce::String
Definition: juce_String.h:39
juce::String::preallocateBytes
void preallocateBytes(size_t numBytesNeeded)
Definition: juce_String.cpp:296