psyn/control.h

struct control_t
{
	float value;
	float step;
};

static inline void control_setstep(struct control_t *control, float value, uint32_t samples)
{
	control->step = (value - control->value) / samples;
}

static inline void control_tick(struct control_t *control)
{
	control->value += control->step;
}