DM81xx RDK Null Link说明

这地方说的不完全正确，NULL link分为两种，即Null Source link和Null Sink link，可以作为数据源的Source或者是Sink。

Null Sink Link详细说明：

   Null Link can be used to take input from a link and then without doing anything return it back to the same link.

   This useful when a link output cannot be given to any other link for testingpurpose we just want to run a given link but not really use the output.

   In such cases the output queue of link can be connected to a Null link.

   The null link will operate like any other link from interface point of view.

   But it wont do anything with the frames it gets.

   It will simply return it back to the sending link.

Null Source Link 详细说明：

   Video Src Link can be used to provide input to the next frames

   This is used to integrate other links when capture link is not available.

   This is useful when capture link is not used but some input is needed for other links

这里讲的是按照目录以及文件名讲的你说的null source是在nullsrc下,还没有提到.

不过正如你所说,我个人觉得我说的这个null link更好的应该叫nullsink link.

从功能上,null link可以很灵活的运用可以考虑select + null link实现一些儿动态切换的应用场景

对于null source我个人认为更应该在arm端实现其功能,辅助以dma操作就可以实现arm对于整个流程frame的一些控制.

这些都是后话.随时可以讨论.

讲的不错