SinOsc.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
namespace Audio
{
    class FSineOsc
    {
    public:
        SIGNALPROCESSING_API FSineOsc();
 
        SIGNALPROCESSING_API FSineOsc(const int32 InSampleRate, const float InFrequencyHz, const float Scale = 1.0f, const float Add = 0.0f);
 
        SIGNALPROCESSING_API virtual ~FSineOsc();
 
        SIGNALPROCESSING_API void Init(const int32 InSampleRate, const float InFrequencyHz, const float Scale = 1.0f, const float Add = 0.0f);
 
        SIGNALPROCESSING_API void SetScale(const float InScale);
 
        SIGNALPROCESSING_API void SetAdd(const float InAdd);
 
        SIGNALPROCESSING_API void SetFrequency(const float InFrequencyHz);
 
        SIGNALPROCESSING_API float GetFrequency() const;
 
        SIGNALPROCESSING_API float ProcessAudio();
 
    protected:
        int32 SampleRate;
        float FrequencyHz;
        float B1;   // Biquad feedback coefficients
        float B2;
        float Yn_1; // y(n - 1)
        float Yn_2; // y(n - 2)
        float Scale;
        float Add;
    };
 
 
}