pub fn discover()->Result<Vec<Render>> 获取设备列表
pub struct RenderPlay{
render: Render,
name: String,
}
impl RenderPlay{
pub fn new(render: Render)->Self
pub fn play(&mut self, url: &str)->Result<()> 播放视频
pub fn is_stopped(&self)->bool 检测状态，如果失败会无限重试
pub fn name(&self)->String 获取设备名
}