PluginProcessor.cpp

/*
  ==============================================================================

    This file contains the basic framework code for a JUCE plugin processor.

  ==============================================================================
*/

#include "PluginProcessor.h"
#include "PluginEditor.h"

//==============================================================================
PMSynthAudioProcessor::PMSynthAudioProcessor()
#ifndef JucePlugin_PreferredChannelConfigurations
     : AudioProcessor (BusesProperties()
                     #if ! JucePlugin_IsMidiEffect
                      #if ! JucePlugin_IsSynth
                       .withInput  ("Input",  juce::AudioChannelSet::stereo(), true)
                      #endif
                       .withOutput ("Output", juce::AudioChannelSet::stereo(), true)
                     #endif
                       ),
#endif
    param (*this, numOperators, numLFOs),
    delay (&param),
    reverb (&param)
{
    // add synth voices
    for (int i = 0; i < numVoices; i++)
    {
        synth.addVoice (new PMSynthVoice (&param));
    }
    synth.addSound (new PMSynthSound());
}

PMSynthAudioProcessor::~PMSynthAudioProcessor()
{
}

//==============================================================================
const juce::String PMSynthAudioProcessor::getName() const
{
    return JucePlugin_Name;
}

bool PMSynthAudioProcessor::acceptsMidi() const
{
   #if JucePlugin_WantsMidiInput
    return true;
   #else
    return false;
   #endif
}

bool PMSynthAudioProcessor::producesMidi() const
{
   #if JucePlugin_ProducesMidiOutput
    return true;
   #else
    return false;
   #endif
}

bool PMSynthAudioProcessor::isMidiEffect() const
{
   #if JucePlugin_IsMidiEffect
    return true;
   #else
    return false;
   #endif
}

double PMSynthAudioProcessor::getTailLengthSeconds() const
{
    return 0.0;
}

int PMSynthAudioProcessor::getNumPrograms()
{
    return 1;   // NB: some hosts don't cope very well if you tell them there are 0 programs,
                // so this should be at least 1, even if you're not really implementing programs.
}

int PMSynthAudioProcessor::getCurrentProgram()
{
    return 0;
}

void PMSynthAudioProcessor::setCurrentProgram (int index)
{
}

const juce::String PMSynthAudioProcessor::getProgramName (int index)
{
    return {};
}

void PMSynthAudioProcessor::changeProgramName (int index, const juce::String& newName)
{
}

//==============================================================================
void PMSynthAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
{
    // prepare synthesizer, delay and reverb
    synth.setCurrentPlaybackSampleRate (sampleRate);
    delay.prepareToPlay (sampleRate);
    reverb.prepareToPlay (sampleRate);
}

void PMSynthAudioProcessor::releaseResources()
{
    // When playback stops, you can use this as an opportunity to free up any
    // spare memory, etc.
}

#ifndef JucePlugin_PreferredChannelConfigurations
bool PMSynthAudioProcessor::isBusesLayoutSupported (const BusesLayout& layouts) const
{
  #if JucePlugin_IsMidiEffect
    juce::ignoreUnused (layouts);
    return true;
  #else
    // This is the place where you check if the layout is supported.
    // In this template code we only support mono or stereo.
    // Some plugin hosts, such as certain GarageBand versions, will only
    // load plugins that support stereo bus layouts.
    if (layouts.getMainOutputChannelSet() != juce::AudioChannelSet::mono()
     && layouts.getMainOutputChannelSet() != juce::AudioChannelSet::stereo())
        return false;

    // This checks if the input layout matches the output layout
   #if ! JucePlugin_IsSynth
    if (layouts.getMainOutputChannelSet() != layouts.getMainInputChannelSet())
        return false;
   #endif

    return true;
  #endif
}
#endif

void PMSynthAudioProcessor::processBlock (juce::AudioBuffer<float>& buffer, juce::MidiBuffer& midiMessages)
{
    // process synthesizer, delay and reverb
    juce::ScopedNoDenormals noDenormals;
    buffer.clear();
    synth.renderNextBlock (buffer, midiMessages, 0, buffer.getNumSamples());
    delay.processBlock (buffer, buffer.getNumSamples());
    reverb.processBlock (buffer, buffer.getNumSamples());
}

//==============================================================================
bool PMSynthAudioProcessor::hasEditor() const
{
    return true; // (change this to false if you choose to not supply an editor)
}

juce::AudioProcessorEditor* PMSynthAudioProcessor::createEditor()
{
    return new juce::GenericAudioProcessorEditor (*this);
}

//==============================================================================
void PMSynthAudioProcessor::getStateInformation (juce::MemoryBlock& destData)
{
    auto state = param.apvts.copyState();
    std::unique_ptr<juce::XmlElement> xml (state.createXml());
    copyXmlToBinary (*xml, destData);
}

void PMSynthAudioProcessor::setStateInformation (const void* data, int sizeInBytes)
{
    std::unique_ptr<juce::XmlElement> xmlState (getXmlFromBinary (data, sizeInBytes));
    if (xmlState.get() != nullptr)
    {
        if (xmlState->hasTagName (param.apvts.state.getType()))
        {
            param.apvts.replaceState (juce::ValueTree::fromXml (*xmlState));
        }
    }
}

//==============================================================================
// This creates new instances of the plugin..
juce::AudioProcessor* JUCE_CALLTYPE createPluginFilter()
{
    return new PMSynthAudioProcessor();
}