PluginProcessor.cpp

/**
 *
 * Copyright (c) 2013-2018 Pascal Gauthier.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 *
 */

#include <stdarg.h>
#include <bitset>

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

#include "Dexed.h"
#include "msfa/synth.h"
#include "msfa/freqlut.h"
#include "msfa/sin.h"
#include "msfa/exp2.h"
#include "msfa/env.h"
#include "msfa/pitchenv.h"
#include "msfa/aligned_buf.h"
#include "msfa/fm_op_kernel.h"

#if JUCE_MSVC
    #pragma comment (lib, "kernel32.lib")
    #pragma comment (lib, "user32.lib")
    #pragma comment (lib, "wininet.lib")
    #pragma comment (lib, "advapi32.lib")
    #pragma comment (lib, "ws2_32.lib")
    #pragma comment (lib, "version.lib")
    #pragma comment (lib, "shlwapi.lib")
    #pragma comment (lib, "winmm.lib")
	#pragma comment (lib, "DbgHelp.lib")
	#pragma comment (lib, "Imm32.lib")

	#ifdef _NATIVE_WCHAR_T_DEFINED
		#ifdef _DEBUG
			#pragma comment (lib, "comsuppwd.lib")
		#else
			#pragma comment (lib, "comsuppw.lib")
		#endif
	#else
		#ifdef _DEBUG
			#pragma comment (lib, "comsuppd.lib")
		#else
			#pragma comment (lib, "comsupp.lib")
		#endif
	#endif

#endif

//==============================================================================
DexedAudioProcessor::DexedAudioProcessor()
    : AudioProcessor(BusesProperties().withOutput("output", AudioChannelSet::stereo(), true)) {
#ifdef DEBUG
    
    // avoid creating the log file if it is in standalone mode
    if ( !JUCEApplication::isStandaloneApp() ) {
        Logger *tmp = Logger::getCurrentLogger();
        if ( tmp == NULL ) {
            Logger::setCurrentLogger(FileLogger::createDateStampedLogger("Dexed", "DebugSession-", "log", "DexedAudioProcessor Created"));
        }
    }
    TRACE("Hi");
#endif

    Exp2::init();
    Tanh::init();
    Sin::init();

    synthTuningState = createStandardTuning();
    synthTuningStateLast = createStandardTuning();
    
    lastStateSave = 0;
    currentNote = -1;
    engineType = -1;
    
    vuSignal = 0;
    monoMode = 0;
    
    resolvAppDir();
    
    initCtrl();
    sendSysexChange = true;
    normalizeDxVelocity = false;
    sysexComm.listener = this;
    showKeyboard = true;
    
    memset(&voiceStatus, 0, sizeof(VoiceStatus));
    setEngineType(DEXED_ENGINE_MARKI);
    
    controllers.values_[kControllerPitchRangeUp] = 3;
    controllers.values_[kControllerPitchRangeDn] = 3;
    controllers.values_[kControllerPitchStep] = 0;
    controllers.masterTune = 0;
    
    loadPreference();

    for (int note = 0; note < MAX_ACTIVE_NOTES; ++note) {
        voices[note].dx7_note = NULL;
    }
    setCurrentProgram(0);    
    nextMidi = NULL;
    midiMsg = NULL;

    clipboardContent = -1;
    
    mtsClient = NULL;
    mtsClient = MTS_RegisterClient();
}

DexedAudioProcessor::~DexedAudioProcessor() {
    Logger *tmp = Logger::getCurrentLogger();
	if ( tmp != NULL ) {
		Logger::setCurrentLogger(NULL);
		delete tmp;
	}
    TRACE("Bye");
    if (mtsClient) MTS_DeregisterClient(mtsClient);
}

//==============================================================================
void DexedAudioProcessor::prepareToPlay(double sampleRate, int samplesPerBlock) {
    Freqlut::init(sampleRate);
    Lfo::init(sampleRate);
    PitchEnv::init(sampleRate);
    Env::init_sr(sampleRate);
    fx.init(sampleRate);
    
    for (int note = 0; note < MAX_ACTIVE_NOTES; ++note) {
        voices[note].dx7_note = new Dx7Note(synthTuningState, mtsClient);
        voices[note].keydown = false;
        voices[note].sustained = false;
        voices[note].live = false;
    }

    currentNote = 0;
    controllers.values_[kControllerPitch] = 0x2000;
    controllers.modwheel_cc = 0;
    controllers.foot_cc = 0;
    controllers.breath_cc = 0;
    controllers.aftertouch_cc = 0;
	controllers.refresh(); 

    sustain = false;
    extra_buf_size = 0;

    keyboardState.reset();
    
    lfo.reset(data + 137);
    
    nextMidi = new MidiMessage(0xF0);
	midiMsg = new MidiMessage(0xF0);
}

void DexedAudioProcessor::releaseResources() {
    currentNote = -1;

    for (int note = 0; note < MAX_ACTIVE_NOTES; ++note) {
        if ( voices[note].dx7_note != NULL ) {
            delete voices[note].dx7_note;
            voices[note].dx7_note = NULL;
        }
        voices[note].keydown = false;
        voices[note].sustained = false;
        voices[note].live = false;
    }

    keyboardState.reset();
    if ( nextMidi != NULL ) {
        delete nextMidi;
        nextMidi = NULL;
    }
    if ( midiMsg != NULL ) {
        delete midiMsg;
        midiMsg = NULL;
    }
}

void DexedAudioProcessor::processBlock(AudioSampleBuffer& buffer, MidiBuffer& midiMessages) {

    juce::ScopedNoDenormals noDenormals;

    int numSamples = buffer.getNumSamples();
    int i;
    
    if ( refreshVoice ) {
        for(i=0;i < MAX_ACTIVE_NOTES;i++) {
            if ( voices[i].live )
                voices[i].dx7_note->update(data, voices[i].midi_note, voices[i].velocity, voices[i].channel);
        }
        lfo.reset(data + 137);
        refreshVoice = false;
    }

    keyboardState.processNextMidiBuffer(midiMessages, 0, numSamples, true);
    
    MidiBuffer::Iterator it(midiMessages);
    hasMidiMessage = it.getNextEvent(*nextMidi,midiEventPos);

    float *channelData = buffer.getWritePointer(0);
  
    // flush first events
    for (i=0; i < numSamples && i < extra_buf_size; i++) {
        channelData[i] = extra_buf[i];
    }
    
    // remaining buffer is still to be processed
    if (extra_buf_size > numSamples) {
        for (int j = 0; j < extra_buf_size - numSamples; j++) {
            extra_buf[j] = extra_buf[j + numSamples];
        }
        extra_buf_size -= numSamples;
        
        // flush the events, they will be process in the next cycle
        while(getNextEvent(&it, numSamples)) {
            processMidiMessage(midiMsg);
        }
    } else {
        for (; i < numSamples; i += N) {
            AlignedBuf<int32_t, N> audiobuf;
            float sumbuf[N];
            
            while(getNextEvent(&it, i)) {
                processMidiMessage(midiMsg);
            }
            
            for (int j = 0; j < N; ++j) {
                audiobuf.get()[j] = 0;
                sumbuf[j] = 0;
            }
            int32_t lfovalue = lfo.getsample();
            int32_t lfodelay = lfo.getdelay();
            
            bool checkMTSESPRetuning = synthTuningState->is_standard_tuning() &&
                                        MTS_HasMaster(mtsClient);
            
            for (int note = 0; note < MAX_ACTIVE_NOTES; ++note) {
                if (voices[note].live) {
                    
                    if (checkMTSESPRetuning)
                        voices[note].dx7_note->updateBasePitches();
                    
                    voices[note].dx7_note->compute(audiobuf.get(), lfovalue, lfodelay, &controllers);
                    
                    for (int j=0; j < N; ++j) {
                        int32_t val = audiobuf.get()[j];
                        
                        val = val >> 4;
                        int clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff : val >> 9;
                        float f = ((float) clip_val) / (float) 0x8000;
                        if( f > 1 ) f = 1;
                        if( f < -1 ) f = -1;
                        sumbuf[j] += f;
                        audiobuf.get()[j] = 0;
                    }
                }
            }
            
            int jmax = numSamples - i;
            for (int j = 0; j < N; ++j) {
                if (j < jmax) {
                    channelData[i + j] = sumbuf[j];
                } else {
                    extra_buf[j - jmax] = sumbuf[j];
                }
            }
        }
        extra_buf_size = i - numSamples;
    }
    
    while(getNextEvent(&it, numSamples)) {
        processMidiMessage(midiMsg);
    }

    fx.process(channelData, numSamples);
    for(i=0; i<numSamples; i++) {
        float s = std::abs(channelData[i]);
        
        const double decayFactor = 0.99992;
        if (s > vuSignal)
            vuSignal = s;
        else if (vuSignal > 0.001f)
            vuSignal *= decayFactor;
        else
            vuSignal = 0;
    }
    
    // DX7 is a mono synth
    buffer.copyFrom(1, 0, channelData, numSamples, 1);
}


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

bool DexedAudioProcessor::getNextEvent(MidiBuffer::Iterator* iter,const int samplePos) {
	if (hasMidiMessage && midiEventPos <= samplePos) {
		*midiMsg = *nextMidi;
		hasMidiMessage = iter->getNextEvent(*nextMidi, midiEventPos);
		return true;
	}
	return false;
}

void DexedAudioProcessor::processMidiMessage(const MidiMessage *msg) {
    if ( msg->isSysEx() ) {
        handleIncomingMidiMessage(NULL, *msg);
        return;
    }

    const uint8 *buf  = msg->getRawData();
    uint8_t cmd = buf[0];
    uint8_t cf0 = cmd & 0xf0;
    auto channel = msg->getChannel();


    if( controllers.mpeEnabled && channel != 1 &&
        (
            (cf0 == 0xb0 && buf[1] == 74 ) || //timbre
            (cf0 == 0xd0 ) || // aftertouch
            (cf0 == 0xe0 ) // pb
            )
        )
    {
        // OK so find my voice index
        int voiceIndex = -1;
        for( int i=0; i<MAX_ACTIVE_NOTES; ++i )
        {
            if( voices[i].keydown && voices[i].channel == channel )
            {
                voiceIndex = i;
                break;
            }
        }
        if( voiceIndex >= 0 )
        {
            int i = voiceIndex;
            switch(cf0) {
            case 0xb0:
                voices[i].mpeTimbre = (int)buf[2];
                voices[i].dx7_note->mpeTimbre = (int)buf[2];
                break;
            case 0xd0:
                voices[i].mpePressure = (int)buf[1];
                voices[i].dx7_note->mpePressure = (int)buf[1];
                break;
            case 0xe0:
                voices[i].mpePitchBend = (int)( buf[1] | (buf[2] << 7) );
                voices[i].dx7_note->mpePitchBend = (int)( buf[1] | ( buf[2] << 7 ) );
                break;
            }
        }
    }
    else
    {
        switch(cmd & 0xf0) {
        case 0x80 :
            keyup(channel, buf[1], buf[2]);
        return;

        case 0x90 :
            if (!synthTuningState->is_standard_tuning() || !buf[2] ||
                !MTS_HasMaster(mtsClient) || !MTS_ShouldFilterNote(mtsClient, buf[1], channel - 1))
                keydown(channel, buf[1], buf[2]);
        return;
            
        case 0xb0 : {
            int ctrl = buf[1];
            int value = buf[2];


                switch(ctrl) {
                case 1:
                    controllers.modwheel_cc = value;
                    controllers.refresh();
                    break;
                case 2:
                    controllers.breath_cc = value;
                    controllers.refresh();
                    break;
                case 4:
                    controllers.foot_cc = value;
                    controllers.refresh();
                    break;
                case 64:
                    sustain = value > 63;
                    if (!sustain) {
                        for (int note = 0; note < MAX_ACTIVE_NOTES; note++) {
                            if (voices[note].sustained && !voices[note].keydown) {
                                voices[note].dx7_note->keyup();
                                voices[note].sustained = false;
                            }
                        }
                    }
                    break;
                case 120:
                    panic();
                    break;
                case 123:
                    for (int note = 0; note < MAX_ACTIVE_NOTES; note++) {
                        if (voices[note].keydown)
                            keyup(channel, voices[note].midi_note, 0);
                    }
                    break;
                default:
                    TRACE("handle CC %d %d", ctrl, value);
                    if ( mappedMidiCC.contains(ctrl) ) {
                        Ctrl *linkedCtrl = mappedMidiCC[ctrl];
                        
                        // We are not publishing this in the DSP thread, moving that in the
                        // event thread
                        linkedCtrl->publishValueAsync((float) value / 127);
                    }
                    // this is used to notify the dialog that a CC value was received.
                    lastCCUsed.setValue(ctrl);
                }
            }
            return;
            
        case 0xc0 :
            setCurrentProgram(buf[1]);
            return;
            
        case 0xd0 :
            controllers.aftertouch_cc = buf[1];
            controllers.refresh();
            return;
        
		case 0xe0 :
			controllers.values_[kControllerPitch] = buf[1] | (buf[2] << 7);
            return;
        }
    }
}

#define ACT(v) (v.keydown ? v.midi_note : -1)

void DexedAudioProcessor::keydown(uint8_t channel, uint8_t pitch, uint8_t velo) {
    if ( velo == 0 ) {
        keyup(channel, pitch, velo);
        return;
    }

    pitch += tuningTranspositionShift();
    
    if ( normalizeDxVelocity ) {
        velo = ((float)velo) * 0.7874015; // 100/127
    }

    if( controllers.mpeEnabled )
    {
        int note = currentNote;
        for( int i=0; i<MAX_ACTIVE_NOTES; ++i )
        {
            if( voices[note].keydown && voices[note].channel == channel )
            {
                // If we get two keydowns on the same channel we are getting information from a non-mpe device
                controllers.mpeEnabled = false;
            }
            note = (note + 1) % MAX_ACTIVE_NOTES;
        }
    }
    
    int note = currentNote;
    for (int i=0; i<MAX_ACTIVE_NOTES; i++) {
        if (!voices[note].keydown) {
            currentNote = (note + 1) % MAX_ACTIVE_NOTES;
            lfo.keydown();  // TODO: should only do this if # keys down was 0
            voices[note].channel = channel;
            voices[note].midi_note = pitch;
            voices[note].velocity = velo;
            voices[note].sustained = sustain;
            voices[note].keydown = true;
            voices[note].dx7_note->init(data, pitch, velo, channel);
            if ( data[136] )
                voices[note].dx7_note->oscSync();
            break;
        }
        note = (note + 1) % MAX_ACTIVE_NOTES;
    }
    
    if ( monoMode ) {
        for(int i=0; i<MAX_ACTIVE_NOTES; i++) {            
            if ( voices[i].live ) {
                // all keys are up, only transfer signal
                if ( ! voices[i].keydown ) {
                    voices[i].live = false;
                    voices[note].dx7_note->transferSignal(*voices[i].dx7_note);
                    break;
                }
                if ( voices[i].midi_note < pitch ) {
                    voices[i].live = false;
                    voices[note].dx7_note->transferState(*voices[i].dx7_note);
                    break;
                }
                return;
            }
        }
    }
 
    voices[note].live = true;
	//TRACE("activate %d [ %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d ]", pitch, ACT(voices[0]), ACT(voices[1]), ACT(voices[2]), ACT(voices[3]), ACT(voices[4]), ACT(voices[5]), ACT(voices[6]), ACT(voices[7]), ACT(voices[8]), ACT(voices[9]), ACT(voices[10]), ACT(voices[11]), ACT(voices[12]), ACT(voices[13]), ACT(voices[14]), ACT(voices[15]));
}

void DexedAudioProcessor::keyup(uint8_t chan, uint8_t pitch, uint8_t velo) {
    pitch += tuningTranspositionShift();

    int note;
    for (note=0; note<MAX_ACTIVE_NOTES; ++note) {
        if ( ( ( controllers.mpeEnabled && voices[note].channel == chan ) || // MPE node - find voice by channel
               (!controllers.mpeEnabled && voices[note].midi_note == pitch ) ) && // regular mode find voice by pitch
             voices[note].keydown ) // but still only grab the one which is keydown
        {
            voices[note].keydown = false;
			//TRACE("deactivate %d [ %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d ]", pitch, ACT(voices[0]), ACT(voices[1]), ACT(voices[2]), ACT(voices[3]), ACT(voices[4]), ACT(voices[5]), ACT(voices[6]), ACT(voices[7]), ACT(voices[8]), ACT(voices[9]), ACT(voices[10]), ACT(voices[11]), ACT(voices[12]), ACT(voices[13]), ACT(voices[14]), ACT(voices[15]));
            break;
        }
    }
    
    // note not found ?
    if ( note >= MAX_ACTIVE_NOTES ) {
		TRACE("note found ??? %d [ %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d ]", pitch, ACT(voices[0]), ACT(voices[1]), ACT(voices[2]), ACT(voices[3]), ACT(voices[4]), ACT(voices[5]), ACT(voices[6]), ACT(voices[7]), ACT(voices[8]), ACT(voices[9]), ACT(voices[10]), ACT(voices[11]), ACT(voices[12]), ACT(voices[13]), ACT(voices[14]), ACT(voices[15]));
        return;
    }
    
    if ( monoMode ) {
        int highNote = -1;
        int target = 0;
        for (int i=0; i<MAX_ACTIVE_NOTES;i++) {
            if ( voices[i].keydown && voices[i].midi_note > highNote ) {
                target = i;
                highNote = voices[i].midi_note;
            }
        }
        
        if ( highNote != -1 && voices[note].live ) {
            voices[note].live = false;
            voices[target].live = true;
            voices[target].dx7_note->transferState(*voices[note].dx7_note);
        }
    }
    
    if ( sustain ) {
        voices[note].sustained = true;
    } else {
        voices[note].dx7_note->keyup();
    }
}

int DexedAudioProcessor::tuningTranspositionShift()
{
    if( synthTuningState->is_standard_tuning() || ! controllers.transpose12AsScale )
        return data[144] - 24;
    else
    {
        int d144 = data[144];
        if( d144 % 12 == 0 )
        {
            int oct = (d144 - 24) / 12;
            int res = oct * synthTuningState->scale_length();
            return res;
        }
        else
            return data[144] - 24;
    }
}

void DexedAudioProcessor::panic() {
    for(int i=0;i<MAX_ACTIVE_NOTES;i++) {
        voices[i].keydown = false;
        voices[i].live = false;
        if ( voices[i].dx7_note != NULL ) {
            voices[i].dx7_note->oscSync();
        }
    }
    keyboardState.reset();
}

void DexedAudioProcessor::handleIncomingMidiMessage(MidiInput* source, const MidiMessage& message) {
    if ( message.isActiveSense() ) 
        return;

    sysexComm.inActivity = true;

    const uint8 *buf = message.getRawData();
    int sz = message.getRawDataSize();

    //TRACE("%X %X %X %X %X %X", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

    if ( ! message.isSysEx() )
        return;
    
    // test if it is a Yamaha Sysex
    if ( buf[1] != 0x43 ) {
        TRACE("not a yamaha sysex %d", buf[0]);
        return;
    }
    
    int substatus = buf[2] >> 4;
    
    if ( substatus == 0 ) {
        // single voice dump
        if ( buf[3] == 0 ) {
            if ( sz < 156 ) {
                TRACE("wrong single voice datasize %d", sz);
                return;
            }
            if ( updateProgramFromSysex(buf+6) )
                TRACE("bad checksum when updating program from sysex message");
        }
        
        // 32 voice dump
        if ( buf[3] == 9 ) {
            if ( sz < 4104 ) {
                TRACE("wrong 32 voice dump data size %d", sz);
                return;
            }
            
            Cartridge received;
            if ( received.load(buf, sz) == 0 ) {
                loadCartridge(received);
                setCurrentProgram(0);
            }
        }
    } else if ( substatus == 1 ) {
        // parameter change
        if ( sz < 7 ) {
           TRACE("wrong single voice datasize %d", sz);
           return;
        }
        
        uint8 offset = (buf[3] << 7) + buf[4];
        uint8 value = buf[5];
        
        TRACE("parameter change message offset:%d value:%d", offset, value);
        
        if ( offset > 155 ) {
            TRACE("wrong offset size");
            return;
        }
        
        if ( offset == 155 ) {
            unpackOpSwitch(value);
        } else {
            data[offset] = value;
        }
    } else {
        TRACE("unknown sysex substatus: %d", substatus);
    }
    
    updateHostDisplay();
    forceRefreshUI = true;
}

int DexedAudioProcessor::getEngineType() {
    return engineType;
}

void DexedAudioProcessor::setEngineType(int tp) {
    TRACE("settings engine %d", tp);
    
    switch (tp)  {
        case DEXED_ENGINE_MARKI:
            controllers.core = &engineMkI;
            break;
        case DEXED_ENGINE_OPL:
            controllers.core = &engineOpl;
            break;
        default:
            controllers.core = &engineMsfa;
            break;
    }
    engineType = tp;
}

void DexedAudioProcessor::setMonoMode(bool mode) {
    panic();
    monoMode = mode;
}

// ====================================================================
bool DexedAudioProcessor::peekVoiceStatus() {
    if ( currentNote == -1 )
        return false;

    // we are trying to find the last "keydown" note
    int note = currentNote;
    for (int i = 0; i < MAX_ACTIVE_NOTES; i++) {
        if (voices[note].keydown) {
            voices[note].dx7_note->peekVoiceStatus(voiceStatus);
            return true;
        }
        if ( --note < 0 )
            note = MAX_ACTIVE_NOTES-1;
    }

    // not found; try a live note
    note = currentNote;
    for (int i = 0; i < MAX_ACTIVE_NOTES; i++) {
        if (voices[note].live) {
            voices[note].dx7_note->peekVoiceStatus(voiceStatus);
            return true;
        }
        if ( --note < 0 )
            note = MAX_ACTIVE_NOTES-1;
    }

    return true;
}

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

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

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

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

bool DexedAudioProcessor::isBusesLayoutSupported(const BusesLayout &layouts) const {
    return layouts.getMainOutputChannelSet() == AudioChannelSet::mono()
                || layouts.getMainOutputChannelSet() == AudioChannelSet::stereo();
}

bool DexedAudioProcessor::acceptsMidi() const {
    return true;
}

bool DexedAudioProcessor::producesMidi() const {
    return true;
}

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

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

const String DexedAudioProcessor::getName() const {
    return JucePlugin_Name;
}

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

void DexedAudioProcessor::updateUI() {
    // notify host something has changed
    updateHostDisplay();
 
    AudioProcessorEditor *editor = getActiveEditor();
    if ( editor == NULL ) {
        return;
    }
	DexedAudioProcessorEditor *dexedEditor = (DexedAudioProcessorEditor *) editor;
    dexedEditor->updateUI();
}

AudioProcessorEditor* DexedAudioProcessor::createEditor() {
    static const uint8_t HIGH_DPI_THRESHOLD = 128;
    AudioProcessorEditor* editor = new DexedAudioProcessorEditor (this);
    float scaleFactor = getDpiScaleFactor();

    if ( scaleFactor == -1 ) {
        if ( Desktop::getInstance().getDisplays().getPrimaryDisplay()->dpi > HIGH_DPI_THRESHOLD ) {
            scaleFactor = 1.5;
        } else {
            scaleFactor = 1.0;
        }
    }
    
    const juce::Rectangle<int> rect(DexedAudioProcessorEditor::WINDOW_SIZE_X * scaleFactor,DexedAudioProcessorEditor::WINDOW_SIZE_Y * scaleFactor);
    bool displayFound = false;
    
    // validate if there is really a display that can show the complete plugin size
    for (auto& display : Desktop::getInstance().getDisplays().displays) {
        if ( display.userArea.getHeight() > rect.getHeight() && display.userArea.getWidth() > rect.getWidth() )
            displayFound = true;
    }
    
    // no display found, scaling to default value	
    if ( ! displayFound )
        setDpiScaleFactor(1.0);
    else 
        setDpiScaleFactor(scaleFactor);
    return editor;
}

void DexedAudioProcessor::setDpiScaleFactor(float factor) {
    // Currently the clap juce wrapper doesn't work with this deprecated scale factor direct set so
    if ( is_clap ) {
        dpiScaleFactor = 1.0;
        return;
    }
    dpiScaleFactor = factor;
    
    // The scale factor needs to be done after object creation otherwise Bitwig, Live and REAPER can't render the
    // plugin window.
    Desktop::getInstance().setGlobalScaleFactor(dpiScaleFactor);
}

void DexedAudioProcessor::handleAsyncUpdate() {
    updateUI();
}

void dexed_trace(const char *source, const char *fmt, ...) {
    char output[4096];
    va_list argptr;
    va_start(argptr, fmt);
    vsnprintf(output, 4095, fmt, argptr);
    va_end(argptr);

    String dest;
    dest << source << " " << output;
    Logger::writeToLog(dest);
}

void DexedAudioProcessor::resetTuning(std::shared_ptr<TuningState> t)
{
    synthTuningState = t;
    synthTuningStateLast = t;
    for( int i=0; i<MAX_ACTIVE_NOTES; ++i )
        if( voices[i].dx7_note != nullptr )
            voices[i].dx7_note->tuning_state_ = synthTuningState;
}

void DexedAudioProcessor::retuneToStandard()
{
    currentSCLData = "";
    currentKBMData = "";
    resetTuning(createStandardTuning());
}

void DexedAudioProcessor::applySCLTuning() {
    FileChooser fc( "Please select a scale (.scl) file.", File(), "*.scl" );
    File s;

    // loop to enforce the proper selection
    for (;;) {
        // open file chooser dialog
        if (!fc.browseForFileToOpen())
            // User cancelled
            return;
        s = fc.getResult();

        // enforce file extenstion ''.scl''.
        // (reason: the extension ''.scl'' is mandatory according to 
        // ''https://www.huygens-fokker.org/scala/scl_format.html''
        if (s.getFileExtension() != ".scl") {
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "Invalid file type!", "Only files with the \".scl\" extension (in lowercase!) are allowed.");
            continue;
        }

        // enforce to select file below the max limit16KB sized files
        if (s.getSize() > MAX_SCL_KBM_FILE_SIZE) {
            std::string msg;
            msg = "File size exceeded the maximum limit of " + std::to_string(MAX_SCL_KBM_FILE_SIZE) + " bytes.";
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "File size error!", msg);
            continue;
        }

        // enforce to select non-empty file
        // TODO: check, whether zero sized files may occur indeed here; if not, delete this if-statement, please
        if (s.getSize() == 0) {
            std::string msg;
            msg = "File is empty.";
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "File size error!", msg);
            continue;
        }

        // try to apply the SCL file 
        applySCLTuning(s);

        // exit the loop
        break;
    }
}

void DexedAudioProcessor::applySCLTuning(File s) {
    std::string sclcontents = s.loadFileAsString().toStdString();
    applySCLTuning(sclcontents);
}

void DexedAudioProcessor::applySCLTuning(std::string sclcontents) {
    if( currentKBMData.size() < 1 )
    {
        auto t = createTuningFromSCLData( sclcontents );
        if (t != nullptr) {            
            resetTuning(t); // update tuning            
            currentSCLData = sclcontents; // remember this SCL data            
            synthTuningStateLast = t; // remember this whole state as a "last good working state"
        }
        else {            
            resetTuning(synthTuningStateLast); // revert to the "last good working state"
        }
    }
    else
    {
        auto t = createTuningFromSCLAndKBMData( sclcontents, currentKBMData );
        if (t != nullptr) {            
            resetTuning(t); // update tuning            
            currentSCLData = sclcontents; // remember this SCL data            
            synthTuningStateLast = t; // remember this whole state as a "last good working state"
        }
        else {            
            resetTuning(synthTuningStateLast); // revert to the "last good working state"
        }
    }
}

void DexedAudioProcessor::applyKBMMapping() {
    FileChooser fc( "Please select a keyboard map (.kbm) file.", File(), "*.kbm" );
    File s;

    // loop to enforce the proper selection
    for (;;) {
        // invoke file chooser dialog
        if (!fc.browseForFileToOpen())            
            return; // User cancelled
        s = fc.getResult();

        // enforce file extenstion ''.kbm''.
        // (reason: the extension ''.kbm'' is mandatory according to 
        // ''https://www.huygens-fokker.org/scala/scl_format.html''
        if (s.getFileExtension() != ".kbm") {
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "Invalid file type!", "Only files with the \".kbm\" extension (in lowercase!) are allowed.");
            continue;
        }

        // enforce to select file below the max limit16KB sized files
        if (s.getSize() > MAX_SCL_KBM_FILE_SIZE) {
            std::string msg;
            msg = "File size exceeded the maximum limit of " + std::to_string(MAX_SCL_KBM_FILE_SIZE) + " bytes.";
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "File size error!", msg);
            continue;
        }

        // enforce to select non-empty file
        // TODO: check, whether zero sized files may occur indeed here; if not, delete this if-statement, please
        if (s.getSize() == 0) {
            std::string msg;
            msg = "File is empty.";
            AlertWindow::showMessageBox(AlertWindow::WarningIcon, "File size error!", msg);
            continue;
        }

        // try to apply KBM mapping
        applyKBMMapping(s);

        // exit the loop
        break;
    }
}

void DexedAudioProcessor::applyKBMMapping( File s )
{
    std::string kbmcontents = s.loadFileAsString().toStdString();
    applyKBMMapping(kbmcontents);
}

void DexedAudioProcessor::applyKBMMapping(std::string kbmcontents) {  
    if( currentSCLData.size() < 1 ) {
        auto t = createTuningFromKBMData(kbmcontents);
        if (t != nullptr) {            
            resetTuning(t); // update tuning
            currentKBMData = kbmcontents; // remember this KBM data
            synthTuningStateLast = t; // remember this whole state as a "last good working state"
        } else {            
            resetTuning(synthTuningStateLast); // revert to the "last good working state"
        }
    } else {
        auto t = createTuningFromSCLAndKBMData( currentSCLData, kbmcontents );
        if (t != nullptr) {            
            resetTuning(t); // update tuning            
            currentKBMData = kbmcontents; // remember this KBM data            
            synthTuningStateLast = t; // remember this whole state as a "last good working state"
        } else {            
            resetTuning(synthTuningStateLast); // revert to "last good working state"
        }
    }
}