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DM8168 DSP端处理算法中多路视频数据处理的疑问

Other Parts Discussed in Thread: TVP5158

软件环境:DVRRDK3.0

数据流:Capture->ipcFramesOutVpss(<->ipcFramesInDsp<->HelloWorldAlg)->Display

helloworld算法打算移植OSD的,查看

mcfw/src_bios6/links_c6xdsp/alg_link/swosd/osdLink_alg.c:
第266行:
pSwOsdObj->videoWindowAddr = pFrame->addr[0][0];
pFrame->addr[0][0]; //指针即为图像的存储位置

假设前端为两路PAL 720*576的视频输入,进入一片 TVP5158 然后采用交织模式 输出8bit BT.656视频

那这个代码要如何操作,从而实现抽离两路视频的Y U V数据呢?