OpenShot Audio Library | OpenShotAudio 0.3.2

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juce_ProcessorDuplicator.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 By using JUCE, you agree to the terms of both the JUCE 5 End-User License
11 Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
12 27th April 2017).
13
14 End User License Agreement: www.juce.com/juce-5-licence
15 Privacy Policy: www.juce.com/juce-5-privacy-policy
16
17 Or: You may also use this code under the terms of the GPL v3 (see
18 www.gnu.org/licenses).
19
20 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
21 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
22 DISCLAIMED.
23
24 ==============================================================================
25*/
26
27 namespace juce
28{
29 namespace dsp
30{
31
42 template <typename MonoProcessorType, typename StateType>
43 struct ProcessorDuplicator
44{
45 ProcessorDuplicator() : state (new StateType()) {}
46 ProcessorDuplicator (StateType* stateToUse) : state (stateToUse) {}
47 ProcessorDuplicator (typename StateType::Ptr stateToUse) : state (std::move (stateToUse)) {}
48 ProcessorDuplicator (const ProcessorDuplicator&) = default;
49 ProcessorDuplicator (ProcessorDuplicator&&) = default;
50
51 void prepare (const ProcessSpec& spec)
52 {
53 processors.removeRange ((int) spec.numChannels, processors.size());
54
55 while (static_cast<size_t> (processors.size()) < spec.numChannels)
56 processors.add (new MonoProcessorType (state));
57
58 auto monoSpec = spec;
59 monoSpec.numChannels = 1;
60
61 for (auto* p : processors)
62 p->prepare (monoSpec);
63 }
64
65 void reset() noexcept { for (auto* p : processors) p->reset(); }
66
67 template<typename ProcessContext>
68 void process (const ProcessContext& context) noexcept
69 {
70 jassert ((int) context.getInputBlock().getNumChannels() <= processors.size());
71 jassert ((int) context.getOutputBlock().getNumChannels() <= processors.size());
72
73 auto numChannels = static_cast<size_t> (jmin (context.getInputBlock().getNumChannels(),
74 context.getOutputBlock().getNumChannels()));
75
76 for (size_t chan = 0; chan < numChannels; ++chan)
77 processors[(int) chan]->process (MonoProcessContext<ProcessContext> (context, chan));
78 }
79
80 typename StateType::Ptr state;
81
82 private:
83 template <typename ProcessContext>
84 struct MonoProcessContext : public ProcessContext
85 {
86 MonoProcessContext (const ProcessContext& multiChannelContext, size_t channelToUse)
87 : ProcessContext (multiChannelContext), channel (channelToUse)
88 {}
89
90 size_t channel;
91
92 typename ProcessContext::ConstAudioBlockType getInputBlock() const noexcept { return ProcessContext::getInputBlock() .getSingleChannelBlock (channel); }
93 typename ProcessContext::AudioBlockType getOutputBlock() const noexcept { return ProcessContext::getOutputBlock().getSingleChannelBlock (channel); }
94 };
95
96 juce::OwnedArray<MonoProcessorType> processors;
97};
98
99} // namespace dsp
100} // namespace juce
juce::OwnedArray
Definition: juce_OwnedArray.h:51
juce::OwnedArray::size
int size() const noexcept
Definition: juce_OwnedArray.h:130
juce::OwnedArray::add
ObjectClass * add(ObjectClass *newObject)
Definition: juce_OwnedArray.h:294
juce::OwnedArray::removeRange
void removeRange(int startIndex, int numberToRemove, bool deleteObjects=true)
Definition: juce_OwnedArray.h:682
juce::dsp::ProcessSpec
Definition: juce_ProcessContext.h:39
juce::dsp::ProcessSpec::numChannels
uint32 numChannels
Definition: juce_ProcessContext.h:47
juce::dsp::ProcessorDuplicator
Definition: juce_ProcessorDuplicator.h:44