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Rotating video on target

I am currently trying to rotate the video so it's standing on top of the target image. 

if I set "90" degree 3d, the video player will be standing on top of the target image, rather than playing flat on top of it. I have been told a function like this exists"

SampleApplicationUtils::rotatePoseMatrix(rotationValue, 1, 0, 0,&modelViewMatrixVideo.data[0]);

But I can't find it in Android sample app, and it does not look like a java function. Does anyone has a hint on how to do this? What file contains this function and how do you use it? Thanks in advance.