#ifndef config_HEADER_
#define config_HEADER_

#include <stdint.h>
#include "const.h"
#include "sample.h"
#include "soundconfig.h"

// Playing sample states.
#define PS_ON      0 // Undamped.
#define PS_OFF     1 // Damped because key off and sustain off.
#define PS_CUT     2 // Damped because cut by other key.

typedef struct {
    Sample  *sample;
    int     state;
    int     idx;
    double  amp;
    double  tau;
} PlayingSample;

typedef struct {
    // Configuration
    SoundConfig conf;

    // Whether or not the key is depressed.
    bool key_down;

    // Samples
    uint8_t num_layers;
    uint8_t num_vars[MAX_LAYERS];
    uint8_t rr_idx[MAX_LAYERS];
    Sample samples[MAX_LAYERS][MAX_VARS];

    // Playing samples
    int32_t buf_size;

    int32_t num_free;
    PlayingSample *ps_free[MAX_PLAYING];

    float *amp_buf;
    int32_t num_playing;
    PlayingSample *ps_playing[MAX_PLAYING];
} Sound;

void sound_init(Sound *sound);
void sound_load_samples(Sound *sound, int32_t buf_size);
void sound_trigger(Sound *sound, double velocity);
void sound_cut(Sound *sound);
void sound_write_buffer(Sound *sound, float *L, float *R);
void sound_free(Sound *sound);

#endif