OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_Bias.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 By using JUCE, you agree to the terms of both the JUCE 7 End-User License
11 Agreement and JUCE Privacy Policy.
12
13 End User License Agreement: www.juce.com/juce-7-licence
14 Privacy Policy: www.juce.com/juce-privacy-policy
15
16 Or: You may also use this code under the terms of the GPL v3 (see
17 www.gnu.org/licenses).
18
19 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
20 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
21 DISCLAIMED.
22
23 ==============================================================================
24*/
25
26 namespace juce::dsp
27{
28
40 template <typename FloatType>
41 class Bias
42{
43 public:
44 Bias() noexcept = default;
45
46 //==============================================================================
50 void setBias (FloatType newBias) noexcept
51 {
52 jassert (newBias >= static_cast<FloatType> (-1) && newBias <= static_cast<FloatType> (1));
53 bias.setTargetValue (newBias);
54 }
55
56 //==============================================================================
60 FloatType getBias() const noexcept { return bias.getTargetValue(); }
61
63 void setRampDurationSeconds (double newDurationSeconds) noexcept
64 {
65 if (! approximatelyEqual (rampDurationSeconds, newDurationSeconds))
66 {
67 rampDurationSeconds = newDurationSeconds;
68 updateRamp();
69 }
70 }
71
72 double getRampDurationSeconds() const noexcept { return rampDurationSeconds; }
73
74 //==============================================================================
76 void prepare (const ProcessSpec& spec) noexcept
77 {
78 sampleRate = spec.sampleRate;
79 updateRamp();
80 }
81
82 void reset() noexcept
83 {
84 bias.reset (sampleRate, rampDurationSeconds);
85 }
86
87 //==============================================================================
89 template <typename SampleType>
90 SampleType processSample (SampleType inputSample) noexcept
91 {
92 return inputSample + bias.getNextValue();
93 }
94
95 //==============================================================================
97 template <typename ProcessContext>
98 void process (const ProcessContext& context) noexcept
99 {
100 auto&& inBlock = context.getInputBlock();
101 auto&& outBlock = context.getOutputBlock();
102
103 jassert (inBlock.getNumChannels() == outBlock.getNumChannels());
104 jassert (inBlock.getNumSamples() == outBlock.getNumSamples());
105
106 auto len = inBlock.getNumSamples();
107 auto numChannels = inBlock.getNumChannels();
108
109 if (context.isBypassed)
110 {
111 bias.skip (static_cast<int> (len));
112
113 if (context.usesSeparateInputAndOutputBlocks())
114 outBlock.copyFrom (inBlock);
115
116 return;
117 }
118
119 if (numChannels == 1)
120 {
121 auto* src = inBlock.getChannelPointer (0);
122 auto* dst = outBlock.getChannelPointer (0);
123
124 for (size_t i = 0; i < len; ++i)
125 dst[i] = src[i] + bias.getNextValue();
126 }
127 else
128 {
129 JUCE_BEGIN_IGNORE_WARNINGS_MSVC (6255 6386)
130 auto* biases = static_cast<FloatType*> (alloca (sizeof (FloatType) * len));
131
132 for (size_t i = 0; i < len; ++i)
133 biases[i] = bias.getNextValue();
134
135 for (size_t chan = 0; chan < numChannels; ++chan)
136 FloatVectorOperations::add (outBlock.getChannelPointer (chan),
137 inBlock.getChannelPointer (chan),
138 biases, static_cast<int> (len));
139 JUCE_END_IGNORE_WARNINGS_MSVC
140 }
141 }
142
143
144 private:
145 //==============================================================================
146 SmoothedValue<FloatType> bias;
147 double sampleRate = 0, rampDurationSeconds = 0;
148
149 void updateRamp() noexcept
150 {
151 if (sampleRate > 0)
152 bias.reset (sampleRate, rampDurationSeconds);
153 }
154};
155
156} // namespace juce::dsp
juce::SmoothedValue
Definition juce_SmoothedValue.h:227
juce::SmoothedValue::reset
void reset(double sampleRate, double rampLengthInSeconds) noexcept
Definition juce_SmoothedValue.h:253
juce::dsp::Bias
Definition juce_Bias.h:42
juce::dsp::Bias::processSample
SampleType processSample(SampleType inputSample) noexcept
Definition juce_Bias.h:90
juce::dsp::Bias::getBias
FloatType getBias() const noexcept
Definition juce_Bias.h:60
juce::dsp::Bias::prepare
void prepare(const ProcessSpec &spec) noexcept
Definition juce_Bias.h:76
juce::dsp::Bias::setRampDurationSeconds
void setRampDurationSeconds(double newDurationSeconds) noexcept
Definition juce_Bias.h:63
juce::dsp::Bias::setBias
void setBias(FloatType newBias) noexcept
Definition juce_Bias.h:50
juce::dsp::Bias::process
void process(const ProcessContext &context) noexcept
Definition juce_Bias.h:98
juce::dsp::ProcessSpec
Definition juce_ProcessContext.h:36