/*
// Created by bruno on 16.2.2025.
*/

#ifndef RISCB_AUDIO_H
#define RISCB_AUDIO_H

#include <SDL2/SDL.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "../tiles/tile.h"

#define SAMPLE_RATE 44100
#define NUM_SYNTH_VOICES 256
#define SMOOTHING_FACTOR 0.001f

typedef struct {
    float timeSec;     // When to trigger this event
    uint8_t type;      // 0 = Note On, 1 = Note Off
    uint8_t note;
    uint8_t velocity;
} MidiEvent;

typedef enum Waveform {
    WAVE_SINE,
    WAVE_SQUARE,
    WAVE_SAWTOOTH,
    WAVE_TRIANGLE,
    WAVE_NOISE
} Waveform;

typedef struct SynthVoice {
    Waveform waveform;
    double phase;
    uint16_t frequency;
    uint8_t volume;
    MiniRect sourceRect;
    float smoothedAmp; // a float that holds the exponentially smoothed amplitude
} SynthVoice;

typedef struct AudioData {
    SynthVoice synthVoices[NUM_SYNTH_VOICES];
    SDL_Rect *playerRect;
    float maxPanDistance;
    uint64_t totalSamples;
} AudioData;

extern AudioData audioData;

void audio_callback(void *userdata, Uint8 *stream, int len);

uint16_t getAvailableChannel();

void load_midi_file(const char *path);

#endif //RISCB_AUDIO_H