flanger_module.h

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#pragma once
 
#include "synth_module.h"
#include "delay.h"
 
namespace vital {
 
    class FlangerModule : public SynthModule {
    public:
        // Maximum semitone offset and delay range for the flanger effect.
        static constexpr mono_float kMaxFlangerSemitoneOffset = 24.0f;
        static constexpr mono_float kFlangerDelayRange = 0.01f;
        static constexpr mono_float kFlangerCenter = kFlangerDelayRange * 0.5f + 0.0005f;
        static constexpr mono_float kModulationDelayBuffer = 0.0005f;
 
        enum {
            kAudioOutput,
            kFrequencyOutput,
            kNumOutputs
        };
 
        FlangerModule(const Output* beats_per_second);
 
        virtual ~FlangerModule();
 
        void init() override;
 
        void hardReset() override { delay_->hardReset(); }
 
        void enable(bool enable) override {
            SynthModule::enable(enable);
            process(1);
            if (!enable)
                delay_->hardReset();
        }
 
        void processWithInput(const poly_float* audio_in, int num_samples) override;
 
        void correctToTime(double seconds) override;
 
        Processor* clone() const override { VITAL_ASSERT(false); return nullptr; }
 
    protected:
        const Output* beats_per_second_; 
        Output* frequency_;              
        Output* phase_offset_;           
        Output* center_;                 
        Output* mod_depth_;              
        poly_float phase_;               
 
        cr::Value delay_frequency_;      
        StereoDelay* delay_;             
 
        JUCE_LEAK_DETECTOR(FlangerModule)
    };
} // namespace vital