allocMatFromBuf   179 modules/cudaoptflow/src/farneback.cpp     GpuMat allocMatFromBuf(int rows, int cols, int type, GpuMat& mat)
allocMatFromBuf   832 modules/video/src/optflowgf.cpp     static UMat allocMatFromBuf(int rows, int cols, int type, UMat &mat)