​ 使用DirectShow获取摄像头数据,数据在回调函数中进行处理。回调函数原型如下:

	/*!
	* @param time : Starting time of the sample, in seconds.
	* @param buff : Pointer to a buffer that contains the sample data.
	* @param len : Length of the buffer pointed to by pBuffer, in bytes.
	*/
	void SetCallBack(std::function<void(double time, BYTE *buff, LONG len)>);

1. 枚举系统安装的摄像头,获取其名称。这里的名称一般用来在UI上显示,用户通过UI选择对应的名称。
2. 设置回调函数。
3. 传入摄像头名称,打开摄像头。打开后会开启一个线程,当有新的帧来临时,会调用回调函数。
4. 在回调函数中处理捕获的数据。
5. 关闭摄像头。

这里是一个单例类,所以一次只能打开一个摄像头。我只在win10上使用vs2017测试过,其他的理论上也是可以的。

Using DirectShow to get camera data.Data will be handled in the callback function.

1. Enumerate all camera in the computer , get friendly name of camera . The name will be show on UI , and user can select camera name to open it.
2. Set callback function.
3. Call open function ,open a new thread ,an when a new frame come , this thread will call callback function.
4. You should handle data in callback function.
5. Close camera.

This is singleton class , which means you only can open one camera each times.I only test on windows 10.