Echo.h

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#pragma once
#include "HephAudioShared.h"
#include "AudioEffect.h"
 
namespace HephAudio
{
    class HEPH_API Echo : public AudioEffect
    {
    public:
        using AudioEffect::Process;
 
    protected:
        size_t reflectionCount;
 
        double reflectionDelay;
 
        double decayFactor;
 
        double echoStart;
 
        double echoDuration;
 
        AudioBuffer pastSamples;
 
        size_t currentIndex;
 
    public:
        Echo();
 
        Echo(size_t reflectionCount, double reflectionDelay, double decayFactor, double echoStart, double echoDuration);
 
        virtual ~Echo() = default;
 
        virtual std::string Name() const override;
        virtual void ResetInternalState() override;
        virtual void Process(AudioBuffer& buffer, size_t startIndex, size_t frameCount) override;
 
        virtual size_t GetReflectionCount() const;
 
        virtual void SetReflectionCount(size_t reflectionCount);
 
        virtual double GetReflectionDelay() const;
 
        virtual void SetReflectionDelay(double reflectionDelay);
 
        virtual double GetDecayFactor() const;
 
        virtual void SetDecayFactor(double decayFactor);
 
        virtual double GetEchoStart() const;
 
        virtual void SetEchoStart(double echoStart);
 
        virtual double GetEchoDuration() const;
 
        virtual void SetEchoDuration(double echoDuration);
 
    protected:
        void ProcessST(const AudioBuffer& inputBuffer, AudioBuffer& outputBuffer, size_t startIndex, size_t frameCount) override;
    };
}