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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2015 - ROLI Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
#include "../JuceLibraryCode/JuceHeader.h"
#include "SurroundEditor.h"
//==============================================================================
/**
*/
class SurroundProcessor : public AudioProcessor,
public ChannelClickListener,
private AsyncUpdater
{
public:
SurroundProcessor()
: AudioProcessor(BusesProperties().withInput ("Input", AudioChannelSet::stereo())
.withOutput ("Output", AudioChannelSet::stereo()))
{}
~SurroundProcessor() {}
//==============================================================================
void prepareToPlay (double sampleRate, int samplesPerBlock) override
{
channelClicked = 0;
sampleOffset = static_cast<int> (std::ceil (sampleRate));
const int numChannels = getChannelCountOfBus (true, 0);
channelActive.resize (numChannels);
alphaCoeffs.resize (numChannels);
reset();
triggerAsyncUpdate();
ignoreUnused (samplesPerBlock);
}
void releaseResources() override { reset(); }
void processBlock (AudioSampleBuffer& buffer, MidiBuffer&) override
{
for (int ch = 0; ch < buffer.getNumChannels(); ++ch)
{
int& channelTime = channelActive.getReference (ch);
float& alpha = alphaCoeffs.getReference (ch);
for (int j = 0; j < buffer.getNumSamples(); ++j)
{
float sample = buffer.getReadPointer (ch)[j];
alpha = (0.8f * alpha) + (0.2f * sample);
if (fabsf (alpha) >= 0.1f)
channelTime = static_cast<int> (getSampleRate() / 2.0);
}
channelTime = jmax (0, channelTime - buffer.getNumSamples());
}
const int fillSamples = jmin (static_cast<int> (std::ceil (getSampleRate())) - sampleOffset,
buffer.getNumSamples());
if (isPositiveAndBelow (channelClicked, buffer.getNumChannels()))
{
float* const channelBuffer = buffer.getWritePointer (channelClicked);
const float freq = (float) (440.0 / getSampleRate());
for (int i = 0; i < fillSamples; ++i)
channelBuffer[i] += std::sin (2.0f * float_Pi * freq * static_cast<float> (sampleOffset++));
}
}
//==============================================================================
AudioProcessorEditor* createEditor() override { return new SurroundEditor (*this); }
bool hasEditor() const override { return true; }
//==============================================================================
bool isBusesLayoutSupported (const BusesLayout& layouts) const override
{
return ((! layouts.getMainInputChannelSet() .isDiscreteLayout())
&& (! layouts.getMainOutputChannelSet().isDiscreteLayout())
&& (layouts.getMainInputChannelSet() == layouts.getMainOutputChannelSet())
&& (! layouts.getMainInputChannelSet().isDisabled()));
}
void reset() override
{
for (int i = 0; i < channelActive.size(); ++i)
channelActive.getReference (i) = 0;
}
//==============================================================================
const String getName() const override { return "Surround PlugIn"; }
bool acceptsMidi() const override { return false; }
bool producesMidi() const override { return false; }
double getTailLengthSeconds() const override { return 0; }
//==============================================================================
int getNumPrograms() override { return 1; }
int getCurrentProgram() override { return 0; }
void setCurrentProgram (int) override {}
const String getProgramName (int) override { return String(); }
void changeProgramName (int , const String& ) override { }
//==============================================================================
void getStateInformation (MemoryBlock&) override {}
void setStateInformation (const void* , int) override {}
void channelButtonClicked (int channelIndex) override
{
channelClicked = channelIndex;
sampleOffset = 0;
}
bool isChannelActive (int channelIndex) override
{
return channelActive [channelIndex] > 0;
}
void handleAsyncUpdate() override
{
if (AudioProcessorEditor* editor = getActiveEditor())
if (SurroundEditor* surroundEditor = dynamic_cast<SurroundEditor*> (editor))
surroundEditor->updateGUI();
}
private:
Array<int> channelActive;
Array<float> alphaCoeffs;
int channelClicked;
int sampleOffset;
//==============================================================================
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (SurroundProcessor)
};
//==============================================================================
// This creates new instances of the plugin..
AudioProcessor* JUCE_CALLTYPE createPluginFilter()
{
return new SurroundProcessor();
}
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