mindball/Source/PluginProcessor.h

#pragma once

#include "DelayEngine.h"

#include <JuceHeader.h>

namespace ParameterIDs
{
    inline constexpr const char* feedback = "feedback";
    inline constexpr const char* locut    = "locut";
    inline constexpr const char* hicut    = "hicut";
    inline constexpr const char* time     = "time";
    inline constexpr const char* timeSync = "timeSync";
    inline constexpr const char* drywet   = "drywet";
    inline constexpr const char* sync     = "sync";
    inline constexpr const char* mode     = "mode";
    inline constexpr const char* doubleTap = "double";
    inline constexpr const char* center   = "center";
    inline constexpr const char* autopan  = "autopan";
    inline constexpr const char* panDepth = "pandepth";
    inline constexpr const char* bypass   = "bypass";
}

class MindballAudioProcessor : public juce::AudioProcessor
{
public:
    MindballAudioProcessor();
    ~MindballAudioProcessor() override = default;

    juce::AudioProcessorValueTreeState apvts;

    void prepareToPlay (double sampleRate, int samplesPerBlock) override;
    void releaseResources() override;

    bool isBusesLayoutSupported (const BusesLayout& layouts) const override;

    void processBlock (juce::AudioBuffer<float>&, juce::MidiBuffer&) override;

    juce::AudioProcessorEditor* createEditor() override;
    bool hasEditor() const override;

    const juce::String getName() const override;
    bool acceptsMidi() const override;
    bool producesMidi() const override;
    double getTailLengthSeconds() const override;

    int getNumPrograms() override;
    int getCurrentProgram() override;
    void setCurrentProgram (int index) override;
    const juce::String getProgramName (int index) override;
    void changeProgramName (int index, const juce::String& newName) override;

    void getStateInformation (juce::MemoryBlock& destData) override;
    void setStateInformation (const void* data, int sizeInBytes) override;

    double getCurrentBpm() const;

    float getDryMeterL() const { return dryMeterL.load (std::memory_order_relaxed); }
    float getDryMeterR() const { return dryMeterR.load (std::memory_order_relaxed); }
    float getWetMeterL() const { return wetMeterL.load (std::memory_order_relaxed); }
    float getWetMeterR() const { return wetMeterR.load (std::memory_order_relaxed); }

private:
    static juce::AudioProcessorValueTreeState::ParameterLayout createParameterLayout();

    static constexpr double maxDelaySeconds = 16.0;

    mindball::DelayEngine engine;
    bool wasBypassed = false;

    juce::AudioBuffer<float> wetScratch;
    float meterDryL = 0.0f, meterDryR = 0.0f;
    float meterWetL = 0.0f, meterWetR = 0.0f;
    float meterDecay = 0.0f;
    std::atomic<double> lastBpm { 120.0 };
    std::atomic<float> dryMeterL { 0.0f }, dryMeterR { 0.0f };
    std::atomic<float> wetMeterL { 0.0f }, wetMeterR { 0.0f };
};