typedef struct SHAPE_DMA_CONTEXT {  
    UINT32 timestamp : 21;
    UINT32 reserved0 : 3;
    UINT32 mixBufPeakMag : 4;
    UINT32 peakMag : 4;
    UINT32 readPointer : 5;
    UINT32 reserved1 : 3;
    UINT32 writePointer : 5;
    UINT32 reserved2 : 3;
    UINT32 full : 1;
    UINT32 reserved3 : 15;
    UINT32 reserved4 : 9;
    UINT32 address : 23;
    UINT32 numFrames : 5;
    UINT32 reserved5 : 3;
    UINT32 floatConvert : 1;
    UINT32 reserved6 : 7;
    UINT32 numChannels : 3;
    UINT32 reserved7 : 5;
    UINT32 channel : 3;
    UINT32 reserved8 : 5;
} SHAPE_DMA_CONTEXT