Rk1126 realizes picture in picture function picture in picture for rk 1126

The project needs to stream the two cameras Merge into one stream  

The main camera displays a large picture   Secondary camera Displayed in the upper right corner   Realize functions similar to picture in picture   

Fumbled Need to put From the camera yuv Just process the data   

rga The module provides some interfaces about image processing   

Use improcess Realize the superposition of images  

If yuv If it is superimposed directly, it shows an exception Here's the picture  

  In actual operation, I found that   direct yuv superposition yuv no way , Small resolution Turn into rgb Format data and then superimpose Can only be ,firefly Posted a post on the Forum And no one replied I'm not sure if it's improcess I won't support it Two yuv Direct operation of data   

Have to yuv The data goes to rgb The format is found to be feasible however To rgb After the format of data, it is obvious that cheating is serious   Generally cool   It's official  nv12_to_rgb24 function  

It is inferred that there may be a problem with this function   .

therefore take nv12 turn rgb The display is normal after the function of is replaced  

Here's the picture ：