_data = realloc(_data, (_sample_count + samples) * _unit_size);
memcpy((uint8_t*)_data + _sample_count * _unit_size,
data, samples * _unit_size);
_data = realloc(_data, (_sample_count + samples) * _unit_size);
memcpy((uint8_t*)_data + _sample_count * _unit_size,
data, samples * _unit_size);