#pragma once

#include <stdint.h>

#define SAMPLE_RATE   48000
#define AMPLITUDE     16384

typedef enum {
    WAVE_NONE = 0,
    WAVE_SINE,
    WAVE_SQUARE,
    WAVE_SAW,
} wave_type_t;

typedef struct {
    wave_type_t type;
    float       freq;
    float       duty;
    float       phase;
} channel_state_t;

void     waveform_init(void);
void     waveform_set(int ch, wave_type_t type, float freq, float duty);
int16_t  waveform_next_sample(int ch);