static unsigned int next_tick = 0;
static unsigned int tick_interval = 0;

void sync_frame(void)
{
    if (next_tick > SDL_GetTicks())
    {
        SDL_Delay(next_tick - SDL_GetTicks());
    }

    next_tick = SDL_GetTicks() + tick_interval;
}

void set_sync_rate(float rate)
{
    tick_interval = (int)(1.0f * 1000.0f / rate);
}