dsp中的算法在AlgLink_OsdalgProcessFrame这个函数中,好像真正的图片叠加函数是SWOSD_blendWindow,他的输入参数是SWOSD_Obj * hndl,这个SWOSD_Obj结构体是不是就是视频码流的位置?里面的videowindowaddr是不是码流的内存地址?码流是以什么样的格式存在的?YUV422?
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