How to use the asciinema.asciicast.events.adjust_speed function in asciinema

def _play(self, asciicast, idle_time_limit, speed, stdin):
        idle_time_limit = idle_time_limit or asciicast.idle_time_limit

        stdout = asciicast.stdout_events()
        stdout = ev.to_relative_time(stdout)
        stdout = ev.cap_relative_time(stdout, idle_time_limit)
        stdout = ev.to_absolute_time(stdout)
        stdout = ev.adjust_speed(stdout, speed)

        base_time = time.time()
        ctrl_c = False
        paused = False
        pause_time = None

        for t, _type, text in stdout:
            delay = t - (time.time() - base_time)

            while stdin and not ctrl_c and delay > 0:
                if paused:
                    while True:
                        data = read_blocking(stdin.fileno(), 1000)

                        if 0x03 in data:  # ctrl-c
                            ctrl_c = True