OPL/Source/PluginProcessor.cpp

#include "PluginProcessor.h"
#include "PluginEditor.h"
#include "EnumFloatParameter.h"
#include "IntFloatParameter.h"

//==============================================================================
JuceOplvstiAudioProcessor::JuceOplvstiAudioProcessor()
{
	// Initalize OPL
	Opl = new Hiopl(44100);	// 1 second at 44100
	Opl->SetSampleRate(44100);
	Opl->EnableWaveformControl();
	for (int i = 1; i <= Hiopl::CHANNELS; i++) {
		Opl->EnableSustain(i, 1);
		Opl->EnableSustain(i, 2);
		Opl->EnableKeyscaling(i, 1);
		Opl->EnableKeyscaling(i, 2);
	}


	// Initialize parameters

	const String waveforms[] = {"Sine", "Half Sine", "Abs Sine", "Quarter Sine"};
	params.push_back(new EnumFloatParameter("Carrier Wave",
		StringArray(waveforms, sizeof(waveforms)/sizeof(String)))
	);
	params.push_back(new EnumFloatParameter("Modulator Wave",
		StringArray(waveforms, sizeof(waveforms)/sizeof(String)))
	);

	const String frq_multipliers[] = {
		"x0.5", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x10", "x12", "x12", "x15", "x15"
	};
	params.push_back(new EnumFloatParameter("Carrier Frequency Multiplier",
		StringArray(frq_multipliers, sizeof(frq_multipliers)/sizeof(String)))
	);
	params.push_back(new EnumFloatParameter("Modulator Frequency Multiplier",
		StringArray(frq_multipliers, sizeof(frq_multipliers)/sizeof(String)))
	);

	const String levels[] = {"0.00 dB", "0.75 dB", "1.50 dB", "2.25 dB", "3.00 dB", "3.75 dB", "4.50 dB", "5.25 dB", "6.00 dB", "6.75 dB", "7.50 dB", "8.25 dB", "9.00 dB", "9.75 dB", "10.50 dB", "11.25 dB", "12.00 dB", "12.75 dB", "13.50 dB", "14.25 dB", "15.00 dB", "15.75 dB", "16.50 dB", "17.25 dB", "18.00 dB", "18.75 dB", "19.50 dB", "20.25 dB", "21.00 dB", "21.75 dB", "22.50 dB", "23.25 dB", "24.00 dB", "24.75 dB", "25.50 dB", "26.25 dB", "27.00 dB", "27.75 dB", "28.50 dB", "29.25 dB", "30.00 dB", "30.75 dB", "31.50 dB", "32.25 dB", "33.00 dB", "33.75 dB", "34.50 dB", "35.25 dB", "36.00 dB", "36.75 dB", "37.50 dB", "38.25 dB", "39.00 dB", "39.75 dB", "40.50 dB", "41.25 dB", "42.00 dB", "42.75 dB", "43.50 dB", "44.25 dB", "45.00 dB", "45.75 dB", "46.50 dB", "47.25 dB"};
	params.push_back(new EnumFloatParameter("Carrier Attenuation",
		StringArray(levels, sizeof(levels)/sizeof(String)))
	);
	params.push_back(new EnumFloatParameter("Modulator Attenuation",
		StringArray(levels, sizeof(levels)/sizeof(String)))
	);
	
	const String ksrs[] = {"None","1.5 dB/8ve","3 dB/8ve","6 dB/8ve"};
	params.push_back(new EnumFloatParameter("Carrier KSR",
		StringArray(ksrs, sizeof(ksrs)/sizeof(String)))
	);
	params.push_back(new EnumFloatParameter("Modulator KSR",
		StringArray(ksrs, sizeof(ksrs)/sizeof(String)))
	);

	params.push_back(new IntFloatParameter("Modulator Feedback", 0, 7));
	params.push_back(new IntFloatParameter("Carrier Attack", 0, 15));
	params.push_back(new IntFloatParameter("Carrier Decay", 0, 15));
	params.push_back(new IntFloatParameter("Carrier Sustain", 0, 15));
	params.push_back(new IntFloatParameter("Carrier Release", 0, 15));
	params.push_back(new IntFloatParameter("Modulator Attack", 0, 15));
	params.push_back(new IntFloatParameter("Modulator Decay", 0, 15));
	params.push_back(new IntFloatParameter("Modulator Sustain", 0, 15));
	params.push_back(new IntFloatParameter("Modulator Release", 0, 15));

	for(unsigned int i = 0; i < params.size(); i++) {
		paramIdxByName[params[i]->getName()] = i;
	}

	// Initialize programs (presets)

	const float a_filt_pad[] = {
		0.f, 0.f,	// waveforms
		0.f, 0.f,	// frequency multipliers
		0.0f, 0.f,	// attenuation
		0.f, 0.f,	// KSR / 8ve
		1.f,		// feeback
		// envelopes
		1.0f/15.0f, 2.0f/15.0f, 10.0f/15.0f, 1.0f/15.0f,
		1.0f/15.0f, 5.0f/15.0f, 1.0f/15.0f, 1.0f/15.0f,
	};
	std::vector<float> v_filt_pad (a_filt_pad, a_filt_pad + sizeof(a_filt_pad) / sizeof(float));
	programs["Filter Pad"] = std::vector<float>(v_filt_pad);

	const float a_sust_bass[] = {
		0.f, 0.5f,
		1.0f/15.0f, 2.0f/15.0f,	// frequency multipliers
		0.f, 0.41f,
		0.f, 0.f,
		0.f,					// feedback
		// envelopes
		8.0f/15.0f, 4.0f/15.0f, 4.0f/15.0f, 4.0f/15.0f,
		8.0f/15.0f, 4.0f/15.0f, 2.0f/15.0f, 9.0f/15.0f,
	};
	std::vector<float> v_sust_bass (a_sust_bass, a_sust_bass + sizeof(a_sust_bass) / sizeof(float));
	programs["Cyberpunk Sust Bass"] = std::vector<float>(v_sust_bass);

	for(std::map<String,std::vector<float>>::iterator it = programs.begin(); it != programs.end(); ++it) {
		program_order.push_back(it->first);
	}
	setCurrentProgram(0);
	
}

JuceOplvstiAudioProcessor::~JuceOplvstiAudioProcessor()
{
}

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

int JuceOplvstiAudioProcessor::getNumParameters()
{
	return params.size();
}

float JuceOplvstiAudioProcessor::getParameter (int index)
{
    return params[index]->getParameter();
}

void JuceOplvstiAudioProcessor::setIntParameter (String name, int value)
{
	int i = paramIdxByName[name];
	IntFloatParameter* p = (IntFloatParameter*)params[i];
	p->setParameterValue(value);
	setParameter(i, p->getParameter());
}

void JuceOplvstiAudioProcessor::setEnumParameter (String name, int index)
{
	int i = paramIdxByName[name];
	EnumFloatParameter* p = (EnumFloatParameter*)params[i];
	p->setParameterIndex(index);
	setParameter(i, p->getParameter());
}

void JuceOplvstiAudioProcessor::setParameter (int index, float newValue)
{
	FloatParameter* p = params[index];
	p->setParameter(newValue);
	String name = p->getName();
	int osc = 2;	// Carrier
	if (name.startsWith("Modulator")) {
		osc = 1;
	}
	if (name.endsWith("Wave")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetWaveform(c, osc, (Waveform)((EnumFloatParameter*)p)->getParameterIndex());
	} else if (name.endsWith("Attenuation")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetAttenuation(c, osc, ((EnumFloatParameter*)p)->getParameterIndex());
	} else if (name.endsWith("Frequency Multiplier")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetFrequencyMultiple(c, osc, (FreqMultiple)((EnumFloatParameter*)p)->getParameterIndex());
	} else if (name.endsWith("Attack")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetEnvelopeAttack(c, osc, ((IntFloatParameter*)p)->getParameterValue());
	} else if (name.endsWith("Decay")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetEnvelopeDecay(c, osc, ((IntFloatParameter*)p)->getParameterValue());
	} else if (name.endsWith("Sustain")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetEnvelopeSustain(c, osc, ((IntFloatParameter*)p)->getParameterValue());
	} else if (name.endsWith("Release")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetEnvelopeRelease(c, osc, ((IntFloatParameter*)p)->getParameterValue());
	} else if (name.endsWith("Feedback")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetModulatorFeedback(c, ((IntFloatParameter*)p)->getParameterValue());
	} else if (name.endsWith("KSR")) {
		for(int c=1;c<=Hiopl::CHANNELS;c++) Opl->SetKsr(c, osc, ((EnumFloatParameter*)p)->getParameterIndex());
	}

}

const String JuceOplvstiAudioProcessor::getParameterName (int index)
{
	return params[index]->getName();
}

const String JuceOplvstiAudioProcessor::getParameterText (int index)
{
    return params[index]->getParameterText();
}

const String JuceOplvstiAudioProcessor::getInputChannelName (int channelIndex) const
{
    return String (channelIndex + 1);
}

const String JuceOplvstiAudioProcessor::getOutputChannelName (int channelIndex) const
{
    return String (channelIndex + 1);
}

bool JuceOplvstiAudioProcessor::isInputChannelStereoPair (int index) const
{
    return true;
}

bool JuceOplvstiAudioProcessor::isOutputChannelStereoPair (int index) const
{
    return true;
}

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

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

bool JuceOplvstiAudioProcessor::silenceInProducesSilenceOut() const
{
    return false;
}

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

int JuceOplvstiAudioProcessor::getNumPrograms()
{
    return programs.size();
}

int JuceOplvstiAudioProcessor::getCurrentProgram()
{
    return i_program;
}

void JuceOplvstiAudioProcessor::setCurrentProgram (int index)
{
	i_program = index;
	std::vector<float> &v_params = programs[getProgramName(index)];
	for (unsigned int i = 0; i < params.size() && i < v_params.size(); i++) {
		setParameter(i, v_params[i]);
	}
}

const String JuceOplvstiAudioProcessor::getProgramName (int index)
{
    return program_order[index];
}

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

//==============================================================================
void JuceOplvstiAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
{
	//Opl->SetSampleRate((int)sampleRate);
    // Use this method as the place to do any pre-playback
    // initialisation that you need..
}

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

void JuceOplvstiAudioProcessor::processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages)
{
	buffer.clear(0, 0, buffer.getNumSamples());
	MidiBuffer::Iterator midi_buffer_iterator(midiMessages);

	MidiMessage midi_message(0);
	int sample_number;
	while (midi_buffer_iterator.getNextEvent(midi_message,sample_number)) {
		int ch = 1 + (midi_message.getNoteNumber() % Hiopl::CHANNELS);	// kind of hackish, but..
		if (midi_message.isNoteOn()) {
			//note on at sample_number samples after 
			//the beginning of the current buffer
			float noteHz = (float)MidiMessage::getMidiNoteInHertz(midi_message.getNoteNumber());
			Opl->KeyOn(ch, noteHz);
		}
		else if (midi_message.isNoteOff()) {
			Opl->KeyOff(ch);
		}
	}
	Opl->Generate(buffer.getNumSamples(), buffer.getSampleData(0));
}

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

AudioProcessorEditor* JuceOplvstiAudioProcessor::createEditor()
{
    return new JuceOplvstiAudioProcessorEditor (this);
}

//==============================================================================
void JuceOplvstiAudioProcessor::getStateInformation (MemoryBlock& destData)
{
    // You should use this method to store your parameters in the memory block.
    // You could do that either as raw data, or use the XML or ValueTree classes
    // as intermediaries to make it easy to save and load complex data.
}

void JuceOplvstiAudioProcessor::setStateInformation (const void* data, int sizeInBytes)
{
    // You should use this method to restore your parameters from this memory block,
    // whose contents will have been created by the getStateInformation() call.
}

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