#pragma once

typedef float play_fn(void *, double time, float in, unsigned char midi_cmd[3]);

#define struct_init(ptr) _struct_init((void **)ptr, sizeof(*ptr))
#define array_init(ptr, len) _struct_init((void **)ptr, sizeof(*ptr) * len)

static inline int _struct_init(void **ptr, size_t size)
{
	if (*ptr) return 0;
	if ((*ptr = calloc(size, 1))) return 0;
	return 1;
}

extern play_fn play;