TI中文支持网Part Number:TDA4VM
在 TDA2 VSDK 里面，有 NULL link这样的节点，这样，可以接收图像数据后，在A15 上通过 回调函数做一些自定义的处理，不过，在TDA4VM 上面，使用 TIOVX的时候，没有发现这样的节点，当用户想在A72上对摄像头传过来的图像进行处理的时候，就不知道怎么处理了；
如果想自己创建这样的node，也不清楚怎么处理，请教一下，要怎么处理比较好？
Is there any node in TIOVX execute the funstion as Null link in TDA2 VSDK? which could be used do something in A72?
In TDA2 VSDK，there is Null link which could do some process at A15 core and by callback function when recieving the images from other link. but, I don't find any node do the similar thing in TIOVX , so it's difficult to process the image from camera in A72.
could you kindly tell me how to create new node to process image such as Null link in VSDK？or , is there any other nodes in TIOVX could do the similar thing in TIOVX？
thanks and best rgds!
Cherry Zhou：
您好我们已收到您的问题并升级到英文论坛寻求帮助，链接如下，如有答复将尽快回复您。谢谢！
e2e.ti.com/…/tda4vm-is-there-any-node-in-tiovx-execute-the-function-as-null-link-in-tda2-vsdk
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Cherry Zhou：
Hi, Sorry for the delay on response.
henry o 说：Is there any node in TIOVX execute the funstion as Null link in TDA2 VSDK? which could be used do something in A72?
No there is no null node in TIOVX.
henry o 说：In TDA2 VSDK，there is Null link which could do some process at A15 core and by callback function when recieving the images from other link. but, I don't find any node do the similar thing in TIOVX , so it's difficult to process the image from camera in A72.
Do you mean null-sink link? i dont recollect if null-sink was doing any processing.. It can just receive input some other link and return the input as it is back.. There is not any node like this in TIOVX, but you could have output of node unconnected or can declare it as graph parameter and can get this output in the application.
The above graph could be realized by opening capture node two times, one for 4 channels and second for 1 channel. 4-channels can be for encode and mosaic and fifth channel for the dms path.
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henry o：
Hello,
Thanks for your kindly help and following. actually this question is resolved by creating a select node which act as select link in vsdk.
TIOVX is very different from VSDK , but since I have little experience on TIOVX, I have to plant the lesson learned in VSDK to TIOVX, so the select node is developed to solve this question.
Thanks and best rgds!
Have a nice day!
