#define NUM_LFO 4
#define NUM_POLYPHONY 32

struct engine_t
{
	struct control_t lowpass;

	struct control_t modwheel;
	struct control_t pitchbend;
	struct control_t aftertouch;

	struct control_t osc_shape[4];
	struct control_t osc_level[4];

	int monosynth;

	struct osc_t osc[NUM_LFO];
	struct voice_t voice[NUM_POLYPHONY];
};

extern struct engine_t _engine;

void engine_init();
void engine_run(struct engine_t *engine, uint32_t samples, float *left, float *right);
void engine_startvoice(struct engine_t *engine, uint8_t note, uint8_t velocity);
void engine_endvoice(struct engine_t *engine, uint8_t note, uint8_t velocity);
void engine_controlchange(struct engine_t *engine, uint8_t controller, uint8_t value);
void engine_programchange(struct engine_t *engine, uint8_t value);
void engine_aftertouch(struct engine_t *engine, uint8_t value);
void engine_pitchchange(struct engine_t *engine, int16_t value);