synth_plugin.h

Go to the documentation of this file.

/*
Summary:
 
SynthPlugin is the core plugin class handling parameter management, saving/loading state, preparing audio processing, and communicating with the host. It integrates the synth engine, GUI interface, and handles parameter automation through ValueBridge instances. It also ensures that parameter changes and preset loading are communicated effectively to the GUI and host.
 */
 
#pragma once
 
#include "JuceHeader.h"
 
#include "synth_base.h"
#include "value_bridge.h"
 
class ValueBridge;
 
class SynthPlugin : public SynthBase, public AudioProcessor, public ValueBridge::Listener {
  public:
    static constexpr int kSetProgramWaitMilliseconds = 500; 
 
    SynthPlugin();
 
    virtual ~SynthPlugin();
 
    SynthGuiInterface* getGuiInterface() override;
 
    void beginChangeGesture(const std::string& name) override;
 
    void endChangeGesture(const std::string& name) override;
 
    void setValueNotifyHost(const std::string& name, vital::mono_float value) override;
 
    const CriticalSection& getCriticalSection() override;
 
    void pauseProcessing(bool pause) override;
 
    void prepareToPlay(double sample_rate, int buffer_size) override;
 
    void releaseResources() override;
 
    void processBlock(AudioSampleBuffer&, MidiBuffer&) override;
 
    AudioProcessorEditor* createEditor() override;
 
    bool hasEditor() const override;
 
    const String getName() const override;
 
    bool supportsMPE() const override { return true; }
 
    const String getInputChannelName(int channel_index) const override;
 
    const String getOutputChannelName(int channel_index) const override;
 
    bool isInputChannelStereoPair(int index) const override;
 
    bool isOutputChannelStereoPair(int index) const override;
 
    bool acceptsMidi() const override;
 
    bool producesMidi() const override;
 
    bool silenceInProducesSilenceOut() const override;
 
    double getTailLengthSeconds() const override;
 
    int getNumPrograms() override { return 1; }
 
    int getCurrentProgram() override { return 0; }
 
    void setCurrentProgram(int index) override { }
 
    const String getProgramName(int index) override;
 
    void changeProgramName(int index, const String& new_name) override { }
 
    void getStateInformation(MemoryBlock& destData) override;
 
    void setStateInformation(const void* data, int size_in_bytes) override;
 
    AudioProcessorParameter* getBypassParameter() const override { return bypass_parameter_; }
 
    void parameterChanged(std::string name, vital::mono_float value) override;
 
  private:
    ValueBridge* bypass_parameter_;      
    double last_seconds_time_;           
    AudioPlayHead::CurrentPositionInfo position_info_; 
 
    std::map<std::string, ValueBridge*> bridge_lookup_; 
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(SynthPlugin)
};