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juce_MixerAudioSource.cpp
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
MixerAudioSource::MixerAudioSource()
: currentSampleRate (0.0), bufferSizeExpected (0)
{
}
MixerAudioSource::~MixerAudioSource()
{
removeAllInputs();
}
//==============================================================================
void MixerAudioSource::addInputSource (AudioSource* input, const bool deleteWhenRemoved)
{
if (input != nullptr && ! inputs.contains (input))
{
double localRate;
int localBufferSize;
{
const ScopedLock sl (lock);
localRate = currentSampleRate;
localBufferSize = bufferSizeExpected;
}
if (localRate > 0.0)
input->prepareToPlay (localBufferSize, localRate);
const ScopedLock sl (lock);
inputsToDelete.setBit (inputs.size(), deleteWhenRemoved);
inputs.add (input);
}
}
void MixerAudioSource::removeInputSource (AudioSource* const input)
{
if (input != nullptr)
{
std::unique_ptr<AudioSource> toDelete;
{
const ScopedLock sl (lock);
const int index = inputs.indexOf (input);
if (index < 0)
return;
if (inputsToDelete [index])
toDelete.reset (input);
inputsToDelete.shiftBits (-1, index);
inputs.remove (index);
}
input->releaseResources();
}
}
void MixerAudioSource::removeAllInputs()
{
OwnedArray<AudioSource> toDelete;
{
const ScopedLock sl (lock);
for (int i = inputs.size(); --i >= 0;)
if (inputsToDelete[i])
toDelete.add (inputs.getUnchecked (i));
inputs.clear();
}
for (int i = toDelete.size(); --i >= 0;)
toDelete.getUnchecked (i)->releaseResources();
}
void MixerAudioSource::prepareToPlay (int samplesPerBlockExpected, double sampleRate)
{
tempBuffer.setSize (2, samplesPerBlockExpected);
const ScopedLock sl (lock);
currentSampleRate = sampleRate;
bufferSizeExpected = samplesPerBlockExpected;
for (int i = inputs.size(); --i >= 0;)
inputs.getUnchecked (i)->prepareToPlay (samplesPerBlockExpected, sampleRate);
}
void MixerAudioSource::releaseResources()
{
const ScopedLock sl (lock);
for (int i = inputs.size(); --i >= 0;)
inputs.getUnchecked (i)->releaseResources();
tempBuffer.setSize (2, 0);
currentSampleRate = 0;
bufferSizeExpected = 0;
}
void MixerAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& info)
{
const ScopedLock sl (lock);
if (inputs.size() > 0)
{
inputs.getUnchecked (0)->getNextAudioBlock (info);
if (inputs.size() > 1)
{
tempBuffer.setSize (jmax (1, info.buffer->getNumChannels()),
info.buffer->getNumSamples());
AudioSourceChannelInfo info2 (&tempBuffer, 0, info.numSamples);
for (int i = 1; i < inputs.size(); ++i)
{
inputs.getUnchecked (i)->getNextAudioBlock (info2);
for (int chan = 0; chan < info.buffer->getNumChannels(); ++chan)
info.buffer->addFrom (chan, info.startSample, tempBuffer, chan, 0, info.numSamples);
}
}
}
else
{
info.clearActiveBufferRegion();
}
}
} // namespace juce
juce::AudioBuffer::getNumChannels
int getNumChannels() const noexcept
Definition juce_AudioSampleBuffer.h:236
juce::AudioBuffer::getNumSamples
int getNumSamples() const noexcept
Definition juce_AudioSampleBuffer.h:242
juce::AudioBuffer::addFrom
void addFrom(int destChannel, int destStartSample, const AudioBuffer &source, int sourceChannel, int sourceStartSample, int numSamples, Type gainToApplyToSource=Type(1)) noexcept
Definition juce_AudioSampleBuffer.h:784
juce::AudioSource::releaseResources
virtual void releaseResources()=0
juce::AudioSource::AudioSource
AudioSource()=default
juce::AudioSource::prepareToPlay
virtual void prepareToPlay(int samplesPerBlockExpected, double sampleRate)=0
juce::MixerAudioSource::removeInputSource
void removeInputSource(AudioSource *input)
Definition juce_MixerAudioSource.cpp:60
juce::MixerAudioSource::getNextAudioBlock
void getNextAudioBlock(const AudioSourceChannelInfo &) override
Definition juce_MixerAudioSource.cpp:128
juce::MixerAudioSource::MixerAudioSource
MixerAudioSource()
Definition juce_MixerAudioSource.cpp:26
juce::MixerAudioSource::removeAllInputs
void removeAllInputs()
Definition juce_MixerAudioSource.cpp:84
juce::MixerAudioSource::addInputSource
void addInputSource(AudioSource *newInput, bool deleteWhenRemoved)
Definition juce_MixerAudioSource.cpp:37
juce::MixerAudioSource::prepareToPlay
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
Definition juce_MixerAudioSource.cpp:102
juce::MixerAudioSource::~MixerAudioSource
~MixerAudioSource() override
Definition juce_MixerAudioSource.cpp:31
juce::MixerAudioSource::releaseResources
void releaseResources() override
Definition juce_MixerAudioSource.cpp:115
juce::OwnedArray
Definition juce_OwnedArray.h:50
juce::OwnedArray::size
int size() const noexcept
Definition juce_OwnedArray.h:129
juce::OwnedArray::getUnchecked
ObjectClass * getUnchecked(int index) const noexcept
Definition juce_OwnedArray.h:159
juce::OwnedArray::add
ObjectClass * add(ObjectClass *newObject)
Definition juce_OwnedArray.h:293
juce::AudioSourceChannelInfo
Definition juce_AudioSource.h:33
juce::AudioSourceChannelInfo::numSamples
int numSamples
Definition juce_AudioSource.h:81
juce::AudioSourceChannelInfo::clearActiveBufferRegion
void clearActiveBufferRegion() const
Definition juce_AudioSource.h:84
juce::AudioSourceChannelInfo::buffer
AudioBuffer< float > * buffer
Definition juce_AudioSource.h:73
juce::AudioSourceChannelInfo::startSample
int startSample
Definition juce_AudioSource.h:77