CUDA EGLFrame 描述符 - 定义EGL单帧的结构体。

每个帧可能包含一个或多个平面，具体取决于表面是否为多平面。EGLFrame的每个平面由cudaEglPlaneDesc表示，其定义为：

‎ typedef struct cudaEglPlaneDesc_st {
           unsigned int width;
           unsigned int height;
           unsigned int depth;
           unsigned int pitch;
           unsigned int numChannels;
           struct cudaChannelFormatDesc channelDesc;
           unsigned int reserved[4];
       } cudaEglPlaneDesc;