Oops, MppDecoderXXX api is the sample for fast MPP developing,
but it is not stable, limited functions, and the souce code is not open.
If you are developing VPU via MPP, please ref -> https://github.com/rockchip-linux/mpp/tree/develop/test
Examples in mpp are very complicated, thats why I asked for "rockchip-mpp-dev" debian package's source code. Because you provided "rockchip-rga-dev" in a similiar way on your github repository, I thought you might share mpp as well