公式U和V缓存器偏移

Question

<强>什么应的缓冲器偏移在U＆V值的 YUV444 格式类型？

<强>像一个例子，如果我使用YV12格式的值如下所示：

  

ppData.inputIDMAChannel.UBufOffset =   iInputHeight * iInputWidth +   （iInputHeight * iInputWidth）/ 4;       ppData.inputIDMAChannel.VBufOffset = iInputHeight * iInputWidth;

iInputHeight = 160＆iInputWidth = 112

<强> ppdata是以下结构的对象：

    typedef struct ppConfigDataStruct
{
    //---------------------------------------------------------------
    // General controls
    //---------------------------------------------------------------
    UINT8         IntType;    
                  //    FIRSTMODULE_INTERRUPT: the interrupt will be 
                  //    rised once the first sub-module finished its job.
                  //    FRAME_INTERRUPT:   the interrput will be rised 
                  //    after all sub-modules finished their jobs.
    //---------------------------------------------------------------
    // Format controls
    //---------------------------------------------------------------

    // For input
    idmaChannel     inputIDMAChannel;

    BOOL            bCombineEnable;
    idmaChannel     inputcombIDMAChannel;
    UINT8           inputcombAlpha;
    UINT32          inputcombColorkey;

    icAlphaType     alphaType;

    // For output
    idmaChannel     outputIDMAChannel;
    CSCEQUATION  CSCEquation;    // Selects R2Y or Y2R CSC Equation
    icCSCCoeffs     CSCCoeffs;      // Selects R2Y or Y2R CSC Equation
    icFlipRot          FlipRot;        // Flip/Rotate controls for VF
    BOOL    allowNopPP;   // flag to indicate we need a NOP PP processing

}*pPpConfigData, ppConfigData;

并idmaChannel结构如下：

 typedef struct idmaChannelStruct
{
    icFormat       FrameFormat;  // YUV or RGB
    icFrameSize    FrameSize;  //  frame size
    UINT32         LineStride;//  stride in bytes
    icPixelFormat  PixelFormat;// Input frame RGB format, set NULL 
                                    // to use standard settings.
    icDataWidth    DataWidth;// Bits per pixel for RGB format
    UINT32    UBufOffset;// offset of U buffer from Y buffer start address
                            // ignored if non-planar image format
    UINT32    VBufOffset;// offset of U buffer from Y buffer start address
                            // ignored if non-planar image format    
} idmaChannel, *pIdmaChannel;

我想为式的 ppData.inputIDMAChannel.UBufOffset ＆的 ppData.inputIDMAChannel.VBufOffset 作为<强> YUV444

在预先感谢

Answer 1

由于YUV444包括每像素24位

因此在U＆V缓冲器偏移将是

ppData.inputIDMAChannel.UBufOffset = iInputHeight * iInputWidth;
ppData.inputIDMAChannel.VBufOffset = 2 * iInputHeight * iInputWidth;

Answer 2

鉴于YUV444使用每分量8个比特，我认为式应该是直接的：

ppData.inputIDMAChannel.UBufOffset = 2 * iInputHeight * iInputWidth;
ppData.inputIDMAChannel.VBufOffset = iInputHeight * iInputWidth;