159 lines
4.3 KiB
C++
159 lines
4.3 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE library.
|
|
Copyright (c) 2017 - ROLI Ltd.
|
|
|
|
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
|