union SHAPE_FLOWGRAPH_COMMAND {  
    UINT64 entry;  
    SHAPE_FLOWGRAPH_COMMAND_HEADER header;  
    SHAPE_FLOWGRAPH_ALLOC_MIXBUFFER_COMMAND allocMixBuffer;  
    SHAPE_FLOWGRAPH_SRC_COMMAND src;  
    SHAPE_FLOWGRAPH_EQCOMP_COMMAND eqComp;  
    SHAPE_FLOWGRAPH_FILTVOL_COMMAND filtVol;  
    SHAPE_FLOWGRAPH_DMA_COMMAND dma;  
}