使用hb_vio_get_data_conditional（uint32_t pipeline_id,VIO_DATA_TYPE_E data_type,void *data,int time）这个函数获取图像数据过程中不理解 time这个参数的作用。地平线官方手册中说int time： 标识所需数据的时间限制
time = 0：清理当前已完成数据，等待下帧数据
time < 0 ：清理当前已完成数据，等待满足帧时间 > (当前时间 - time) 的帧
time > 0 ：等待满足帧时间 > (当前时间 -time) 的帧
有1个疑问：
1、这个time单位是什么，ns纳秒 um 微秒 还是ms毫秒 还是其他表示时间的数值？
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