#pragma once

#include <SDL2/SDL.h>

#define CHIPTUNE_EFFECT_NONE    0
#define CHIPTUNE_EFFECT_SLIDE   1
#define CHIPTUNE_EFFECT_VIBRATO 2
#define CHIPTUNE_EFFECT_DROP    3
#define CHIPTUNE_EFFECT_FADEIN  4
#define CHIPTUNE_EFFECT_FADEOUT 5

#define CHIPTUNE_INSTRUMENT_SAWTOOTH 0
#define CHIPTUNE_INSTRUMENT_SQUARE   1
#define CHIPTUNE_INSTRUMENT_TRIANGLE 2
#define CHIPTUNE_INSTRUMENT_NOISE    3

class toneGen {
    public:
        toneGen();
        void setNoteLength(const int note_length);
        void setup(const uint8_t note, const uint8_t instrument, const uint8_t volume, const uint8_t effect);
        void setup(const uint16_t tracker_note);
        const int getSamples(const int numSamples, Sint16 *buffer);

    private:
        uint8_t note, instrument, volume, effect;
        float nominal_volume, current_volume;
        Sint16 df, old_df, f;
        int note_length;
        int current_pos;
};