OpenShot Audio Library | OpenShotAudio 0.3.2
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juce_ChannelRemappingAudioSource.cpp
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
23namespace juce
24{
25
27 const bool deleteSourceWhenDeleted)
28 : source (source_, deleteSourceWhenDeleted),
29 requiredNumberOfChannels (2)
30{
31 remappedInfo.buffer = &buffer;
32 remappedInfo.startSample = 0;
33}
34
36
37//==============================================================================
43
45{
46 const ScopedLock sl (lock);
47
48 remappedInputs.clear();
49 remappedOutputs.clear();
50}
51
53{
54 const ScopedLock sl (lock);
55
56 while (remappedInputs.size() < destIndex)
57 remappedInputs.add (-1);
58
59 remappedInputs.set (destIndex, sourceIndex);
60}
61
63{
64 const ScopedLock sl (lock);
65
66 while (remappedOutputs.size() < sourceIndex)
67 remappedOutputs.add (-1);
68
69 remappedOutputs.set (sourceIndex, destIndex);
70}
71
73{
74 const ScopedLock sl (lock);
75
76 if (inputChannelIndex >= 0 && inputChannelIndex < remappedInputs.size())
77 return remappedInputs.getUnchecked (inputChannelIndex);
78
79 return -1;
80}
81
83{
84 const ScopedLock sl (lock);
85
86 if (outputChannelIndex >= 0 && outputChannelIndex < remappedOutputs.size())
87 return remappedOutputs .getUnchecked (outputChannelIndex);
88
89 return -1;
90}
91
92//==============================================================================
94{
95 source->prepareToPlay (samplesPerBlockExpected, sampleRate);
96}
97
99{
100 source->releaseResources();
101}
102
104{
105 const ScopedLock sl (lock);
106
107 buffer.setSize (requiredNumberOfChannels, bufferToFill.numSamples, false, false, true);
108
109 const int numChans = bufferToFill.buffer->getNumChannels();
110
111 for (int i = 0; i < buffer.getNumChannels(); ++i)
112 {
114
115 if (remappedChan >= 0 && remappedChan < numChans)
116 {
117 buffer.copyFrom (i, 0, *bufferToFill.buffer,
119 bufferToFill.startSample,
120 bufferToFill.numSamples);
121 }
122 else
123 {
124 buffer.clear (i, 0, bufferToFill.numSamples);
125 }
126 }
127
128 remappedInfo.numSamples = bufferToFill.numSamples;
129
130 source->getNextAudioBlock (remappedInfo);
131
132 bufferToFill.clearActiveBufferRegion();
133
134 for (int i = 0; i < requiredNumberOfChannels; ++i)
135 {
137
138 if (remappedChan >= 0 && remappedChan < numChans)
139 {
140 bufferToFill.buffer->addFrom (remappedChan, bufferToFill.startSample,
141 buffer, i, 0, bufferToFill.numSamples);
142
143 }
144 }
145}
146
147//==============================================================================
148std::unique_ptr<XmlElement> ChannelRemappingAudioSource::createXml() const
149{
150 auto e = std::make_unique<XmlElement> ("MAPPINGS");
151 String ins, outs;
152
153 const ScopedLock sl (lock);
154
155 for (int i = 0; i < remappedInputs.size(); ++i)
156 ins << remappedInputs.getUnchecked(i) << ' ';
157
158 for (int i = 0; i < remappedOutputs.size(); ++i)
159 outs << remappedOutputs.getUnchecked(i) << ' ';
160
161 e->setAttribute ("inputs", ins.trimEnd());
162 e->setAttribute ("outputs", outs.trimEnd());
163
164 return e;
165}
166
168{
169 if (e.hasTagName ("MAPPINGS"))
170 {
171 const ScopedLock sl (lock);
172
174
176 ins.addTokens (e.getStringAttribute ("inputs"), false);
177 outs.addTokens (e.getStringAttribute ("outputs"), false);
178
179 for (int i = 0; i < ins.size(); ++i)
180 remappedInputs.add (ins[i].getIntValue());
181
182 for (int i = 0; i < outs.size(); ++i)
183 remappedOutputs.add (outs[i].getIntValue());
184 }
185}
186
187} // namespace juce
ElementType getUnchecked(int index) const
Definition juce_Array.h:252
int size() const noexcept
Definition juce_Array.h:215
void add(const ElementType &newElement)
Definition juce_Array.h:418
void set(int indexToChange, ParameterType newValue)
Definition juce_Array.h:542
void clear()
Definition juce_Array.h:188
void setSize(int newNumChannels, int newNumSamples, bool keepExistingContent=false, bool clearExtraSpace=false, bool avoidReallocating=false)
int getNumChannels() const noexcept
void copyFrom(int destChannel, int destStartSample, const AudioBuffer &source, int sourceChannel, int sourceStartSample, int numSamples) noexcept
void setOutputChannelMapping(int sourceChannelIndex, int destChannelIndex)
void getNextAudioBlock(const AudioSourceChannelInfo &) override
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
void setNumberOfChannelsToProduce(int requiredNumberOfChannels)
int getRemappedInputChannel(int inputChannelIndex) const
int getRemappedOutputChannel(int outputChannelIndex) const
ChannelRemappingAudioSource(AudioSource *source, bool deleteSourceWhenDeleted)
std::unique_ptr< XmlElement > createXml() const
void setInputChannelMapping(int destChannelIndex, int sourceChannelIndex)
AudioBuffer< float > * buffer