Synth/Oscillator.h

#pragma once

namespace Audio
{

    const float SAMPLE_RATIO = 44100.0f;
    const float PI_A = 3.14159265359f;
    const size_t BUFFER_SIZE = 1024;

    enum Shape
    {
        SINE
    };

    class Oscillator
    {

    protected:
        float m_phase;
        float m_phase_stride;
        float m_frequency;
        Shape m_shape;
        float sample_duration;
        
        float buffer[BUFFER_SIZE] = {0};
    
    public:
        
        Oscillator() = default;
        float frequency() { return m_frequency; }
        Shape shape() { return m_shape; }
        /* float phase() { return m_phase; }
        float phase_stide() { return m_phase_stride; }
        void phase(float phase) { m_phase = phase; }
        void phase_stride(float phase_stride) { m_phase_stride = phase_stride; }
 */
        void* data() { return (void *)buffer; }


        virtual void update() {} ;
    };


    class SquareOscillator: public Oscillator
    {
        
        public:
        SquareOscillator(float frequency) {
            sample_duration = 1 / SAMPLE_RATIO;
            m_frequency = frequency;
            m_phase = 0;
            m_phase_stride = frequency * sample_duration;
        };

        void update() override;
    };


    class SineOscillator: public Oscillator {

        public: 
        SineOscillator(float frequency) {
            sample_duration = 1 / SAMPLE_RATIO;
            m_frequency = frequency;
            m_phase = 0;
            m_phase_stride = frequency * sample_duration;
        }

        void update() override;

    };
};