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网站建设培训学校,泰兴网页定制,wordpress系统选择,东阳做网站的公司YUY2经常用于电视制式以及许多摄像头的输出格式.而我们在处理时经常需要将其转化为RGB进行处理,这里简单介绍下YUY2(YUV)与RGB之间相互转化的关系: http://msdn2.microsoft.com/en-us/library/ms893078.aspx YUY2(YUV) To RGB: C Y - 16 D U - 128 E V - 128 R clip((…YUY2经常用于电视制式以及许多摄像头的输出格式.而我们在处理时经常需要将其转化为RGB进行处理,这里简单介绍下YUY2(YUV)与RGB之间相互转化的关系: http://msdn2.microsoft.com/en-us/library/ms893078.aspx YUY2(YUV) To RGB: C Y - 16 D U - 128 E V - 128 R clip(( 298 * C 409 * E 128) 8) G clip(( 298 * C - 100 * D - 208 * E 128) 8) B clip(( 298 * C 516 * D 128) 8) 其中 clip()为限制函数,将其取值限制在0-255之间. RGB To YUY2(YUV): Y ( ( 66 * R 129 * G 25 * B 128) 8) 16 U ( ( -38 * R - 74 * G 112 * B 128) 8) 128 V ( ( 112 * R - 94 * G - 18 * B 128) 8) 128上述两个公式在代码中的 int YUV2RGB(void* pYUV, void* pRGB, int width, int height, bool alphaYUV, bool alphaRGB); int RGB2YUV(void* pRGB, void* pYUVX, int width, int height, bool alphaYUV, bool alphaRGB); 函数中转换。在诸如摄像头的数据获取中我们往往需要直接在YUY2(YUV)空间上进行一些图象处理我们希望能够在YUY2 (YUV)进行一些RGB上可以做到的处理。这里已blending为例将两张带有透明度的YUY2(YUV)图片进行叠加 以达到在RGB空间进行图像合成的效果。RGB空间进行图像叠加通常背景BG是不透明的而前景FG是带有透明度的。在RGB空间可以简单表示为 Rdest Rfg*alpha Rbg*(1-alpha); Gdest Gfg*alpha Gbg*(1-alpha); Bdest Bfg*alpha Bbg*(1-alpha); // Rdest、Gdest、Bdest 为最终合成后的像素值考虑到 Y ( ( 66 * R 129 * G 25 * B 128) 8) 16 U ( ( -38 * R - 74 * G 112 * B 128) 8) 128 V ( ( 112 * R - 94 * G - 18 * B 128) 8) 128 我们可以推导出(Ydest-16)8 ((Yfg-16)8)*alpha ((Ybg-16)8)*(1-alpha); (Udest-128)8 ((Ufg-128)8)*alpha ((Ubg-128)8)*(1-alpha); (Vdest-128)8 ((Vfg-128)8)*alpha ((Vbg-128)8)*(1-alpha);从而可以得到 Ydest (Yfg-16)*alpha (Ybg-16)*(1-alpha) 16; Udest (Ufg-128)*alpha (Ubg-128)*(1-alpha) 128; Vdest (Vfg-128)*alpha (Vbg-128)*(1-alpha) 128;这个叠加过程在函数 int YUVBlending(void* pBGYUV, void* pFGYUV, int width, int height, bool alphaBG, bool alphaFG) 中实现。由于本文针对摄像头采集所得的数据进行处理因此数据为YUY2格式即4个字节来表示两个像素点的YUV信息 排列为Y1 U1 Y2 V2 对于像素点1为(Y1, U1, V1)像素点2为(Y2, U1, V1)。即两个像素点共用U、V信息。这里假设带有alpha透明度的YUV格式用6个字节来表示两个像素点的YUV以及alpha信息排列为 Y1 U1 Y2 V1 alpha1 alpha2 其中像素点1为(Y1, U1, V1, alpha1)像素点2为(Y2, U1, V1, alpha2)。其中alpha为对应点的透明度信息。而带有alpha透明度RGB格式的图片假设为32bits的BMP图片每个像素点用4bytes来表示分别为B G R alpha信息。上述函数的具体实现为 view plaincopy to clipboardprint?//   // YUV2RGB   // pYUV         point to the YUV data   // pRGB         point to the RGB data   // width        width of the picture   // height       height of the picture   // alphaYUV     is there an alpha channel in YUV   // alphaRGB     is there an alpha channel in RGB   //   int YUV2RGB(void* pYUV, void* pRGB, int width, int height, bool alphaYUV, bool alphaRGB)  {      if (NULL  pYUV)      {          return -1;      }      unsigned char* pYUVData  (unsigned char *)pYUV;      unsigned char* pRGBData  (unsigned char *)pRGB;      if (NULL  pRGBData)      {          if (alphaRGB)          {              pRGBData  new unsigned char[width*height*4];          }          else              pRGBData  new unsigned char[width*height*3];      }      int Y1, U1, V1, Y2, alpha1, alpha2, R1, G1, B1, R2, G2, B2;      int C1, D1, E1, C2;      if (alphaRGB)      {          if (alphaYUV)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*3j*6);                      U1  *(pYUVDatai*width*3j*61);                      Y2  *(pYUVDatai*width*3j*62);                      V1  *(pYUVDatai*width*3j*63);                      alpha1  *(pYUVDatai*width*3j*64);                      alpha2  *(pYUVDatai*width*3j*65);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*4j*82)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*4j*81)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*4j*8)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*4j*83)  alpha1;                          *(pRGBData(height-i-1)*width*4j*86)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*4j*85)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*4j*84)  B20 ? 0 : B2;                      *(pRGBData(height-i-1)*width*4j*87)  alpha2;                      }              }             }          else          {              int alpha  255;              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*2j*4);                      U1  *(pYUVDatai*width*2j*41);                      Y2  *(pYUVDatai*width*2j*42);                      V1  *(pYUVDatai*width*2j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*4j*82)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*4j*81)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*4j*8)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*4j*83)  alpha;                       *(pRGBData(height-i-1)*width*4j*86)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*4j*85)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*4j*84)  B20 ? 0 : B2;                      *(pRGBData(height-i-1)*width*4j*87)  alpha;                   }              }             }      }      else      {          if (alphaYUV)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*3j*4);                      U1  *(pYUVDatai*width*3j*41);                      Y2  *(pYUVDatai*width*3j*42);                      V1  *(pYUVDatai*width*3j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*3j*62)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*3j*61)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*3j*6)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*3j*65)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*3j*64)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*3j*63)  B20 ? 0 : B2;                  }              }          }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*2j*4);                      U1  *(pYUVDatai*width*2j*41);                      Y2  *(pYUVDatai*width*2j*42);                      V1  *(pYUVDatai*width*2j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*3j*62)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*3j*61)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*3j*6)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*3j*65)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*3j*64)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*3j*63)  B20 ? 0 : B2;                  }              }             }      }      return 0;  }    //   // RGB2YUV   // pRGB         point to the RGB data   // pYUV         point to the YUV data   // width        width of the picture   // height       height of the picture   // alphaYUV     is there an alpha channel in YUV   // alphaRGB     is there an alpha channel in RGB   //   int RGB2YUV(void* pRGB, void* pYUV, int width, int height, bool alphaYUV, bool alphaRGB)  {      if (NULL  pRGB)      {          return -1;      }      unsigned char* pRGBData  (unsigned char *)pRGB;      unsigned char* pYUVData  (unsigned char *)pYUV;      if (NULL  pYUVData)      {          if (alphaYUV)          {              pYUVData  new unsigned char[width*height*3];          }          else              pYUVData  new unsigned char[width*height*2];      }      int R1, G1, B1, R2, G2, B2, Y1, U1, Y2, V1;      int alpha1, alpha2;      if (alphaYUV)      {          if (alphaRGB)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*4j*8);                      G1  *(pRGBData(height-i-1)*width*4j*81);                      R1  *(pRGBData(height-i-1)*width*4j*82);                      alpha1  *(pRGBData(height-i-1)*width*4j*83);                      B2  *(pRGBData(height-i-1)*width*4j*84);                      G2  *(pRGBData(height-i-1)*width*4j*85);                      R2  *(pRGBData(height-i-1)*width*4j*86);                      alpha2  *(pRGBData(height-i-1)*width*4j*87);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*3j*6)  Y1;                      *(pYUVDatai*width*3j*61)  U1;                      *(pYUVDatai*width*3j*62)  Y2;                      *(pYUVDatai*width*3j*63)  V1;                      *(pYUVDatai*width*3j*64)  alpha1;                      *(pYUVDatai*width*3j*65)  alpha2;                  }              }             }          else          {              unsigned char alpha  255;              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*3j*6);                      G1  *(pRGBData(height-i-1)*width*3j*61);                      R1  *(pRGBData(height-i-1)*width*3j*62);                      B2  *(pRGBData(height-i-1)*width*3j*63);                      G2  *(pRGBData(height-i-1)*width*3j*64);                      R2  *(pRGBData(height-i-1)*width*3j*65);                      Y1  ((66*R1129*G125*B1128)8)  16;                      U1  ((-38*R1-74*G1112*B1128)8(-38*R2-74*G2112*B2128)8)/2  128;                      Y2  ((66*R2129*G225*B2128)8)  16;                      V1  ((112*R1-94*G1-18*B1128)8  (112*R2-94*G2-18*B2128)8)/2  128;                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*3j*6)  Y1;                      *(pYUVDatai*width*3j*61)  U1;                      *(pYUVDatai*width*3j*62)  Y2;                      *(pYUVDatai*width*3j*63)  V1;                      *(pYUVDatai*width*3j*64)  alpha;                      *(pYUVDatai*width*3j*65)  alpha;                  }              }             }      }      else      {          if (alphaRGB)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*4j*8);                      G1  *(pRGBData(height-i-1)*width*4j*81);                      R1  *(pRGBData(height-i-1)*width*4j*82);                      B2  *(pRGBData(height-i-1)*width*4j*84);                      G2  *(pRGBData(height-i-1)*width*4j*85);                      R2  *(pRGBData(height-i-1)*width*4j*86);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*2j*4)  Y1;                      *(pYUVDatai*width*2j*41)  U1;                      *(pYUVDatai*width*2j*42)  Y2;                      *(pYUVDatai*width*2j*43)  V1;                  }              }             }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*3j*6);                      G1  *(pRGBData(height-i-1)*width*3j*61);                      R1  *(pRGBData(height-i-1)*width*3j*62);                      B2  *(pRGBData(height-i-1)*width*3j*63);                      G2  *(pRGBData(height-i-1)*width*3j*64);                      R2  *(pRGBData(height-i-1)*width*3j*65);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*2j*4)  Y1;                      *(pYUVDatai*width*2j*41)  U1;                      *(pYUVDatai*width*2j*42)  Y2;                      *(pYUVDatai*width*2j*43)  V1;                  }              }             }      }      return 0;  }    //   // pGBYUV           point to the background YUV data   // pFGYUV           point to the foreground YUV data   // width            width of the picture   // height           height of the picture   // alphaBG          is there an alpha channel in background YUV data   // alphaFG          is there an alpha channel in fourground YUV data   //   int YUVBlending(void* pBGYUV, void* pFGYUV, int width, int height, bool alphaBG, bool alphaFG)  {      if (NULL  pBGYUV || NULL  pFGYUV)      {          return -1;      }      unsigned char* pBGData  (unsigned char*)pBGYUV;      unsigned char* pFGData  (unsigned char*)pFGYUV;      if (!alphaFG)      {          if (!alphaBG)          {              memcpy(pBGData, pFGData, width*height*2);          }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      *(pBGDatai*width*2j*4)  *(pFGDatai*width*2j*4);                      *(pBGDatai*width*2j*41)  *(pFGDatai*width*2j*41);                      *(pBGDatai*width*2j*42)  *(pFGDatai*width*2j*42);                      *(pBGDatai*width*2j*43)  *(pFGDatai*width*2j*43);                  }              }          }      }      int Y11, U11, V11, Y12, Y21, U21, V21, Y22;      int alpha1, alpha2;      if (!alphaBG)      {          for (int i0; iheight; i)          {              for (int j0; jwidth/2; j)              {                  Y11  *(pBGDatai*width*2j*4);                  U11  *(pBGDatai*width*2j*41);                  Y12  *(pBGDatai*width*2j*42);                  V11  *(pBGDatai*width*2j*43);                    Y21  *(pFGDatai*width*3j*6);                  U21  *(pFGDatai*width*3j*61);                  Y22  *(pFGDatai*width*3j*62);                  V21  *(pFGDatai*width*3j*63);                  alpha1  *(pFGDatai*width*3j*64);                  alpha2  *(pFGDatai*width*3j*65);                    *(pBGDatai*width*2j*4)  (Y21-16)*alpha1/255(Y11-16)*(255-alpha1)/25516;                  *(pBGDatai*width*2j*41)  ((U21-128)*alpha1/255(U11-128)*(255-alpha1)/255  (U21-128)*alpha2/255(U11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*2j*43)  ((V21-128)*alpha1/255(V11-128)*(255-alpha1)/255  (V21-128)*alpha2/255(V11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*2j*42)  (Y22-16)*alpha2/255(Y12-16)*(255-alpha2)/25516;              }          }      }      else      {          for (int i0; iheight; i)          {              for (int j0; jwidth/2; j)              {                  Y11  *(pBGDatai*width*3j*6);                  U11  *(pBGDatai*width*3j*61);                  Y12  *(pBGDatai*width*3j*62);                  V11  *(pBGDatai*width*3j*63);                    Y21  *(pFGDatai*width*3j*6);                  U21  *(pFGDatai*width*3j*61);                  Y22  *(pFGDatai*width*3j*62);                  V21  *(pFGDatai*width*3j*63);                  alpha1  *(pFGDatai*width*3j*64);                  alpha2  *(pFGDatai*width*3j*65);                    *(pBGDatai*width*3j*6)  (Y21-16)*alpha1/255(Y11-16)*(255-alpha1)/25516;                  *(pBGDatai*width*3j*61)  ((U21-128)*alpha1/255(U11-128)*(255-alpha1)/255  (U21-128)*alpha2/255(U11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*3j*63)  ((V21-128)*alpha1/255(V11-128)*(255-alpha1)/255  (V21-128)*alpha2/255(V11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*3j*62)  (Y22-16)*alpha2/255(Y12-16)*(255-alpha2)/25516;              }          }      }      return 0;  }  [c-sharp] view plaincopyprint?//  // YUV2RGB  // pYUV         point to the YUV data  // pRGB         point to the RGB data  // width        width of the picture  // height       height of the picture  // alphaYUV     is there an alpha channel in YUV  // alphaRGB     is there an alpha channel in RGB  //  int YUV2RGB(void* pYUV, void* pRGB, int width, int height, bool alphaYUV, bool alphaRGB)  {      if (NULL  pYUV)      {          return -1;      }      unsigned char* pYUVData  (unsigned char *)pYUV;      unsigned char* pRGBData  (unsigned char *)pRGB;      if (NULL  pRGBData)      {          if (alphaRGB)          {              pRGBData  new unsigned char[width*height*4];          }          else              pRGBData  new unsigned char[width*height*3];      }      int Y1, U1, V1, Y2, alpha1, alpha2, R1, G1, B1, R2, G2, B2;      int C1, D1, E1, C2;      if (alphaRGB)      {          if (alphaYUV)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*3j*6);                      U1  *(pYUVDatai*width*3j*61);                      Y2  *(pYUVDatai*width*3j*62);                      V1  *(pYUVDatai*width*3j*63);                      alpha1  *(pYUVDatai*width*3j*64);                      alpha2  *(pYUVDatai*width*3j*65);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*4j*82)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*4j*81)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*4j*8)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*4j*83)  alpha1;                          *(pRGBData(height-i-1)*width*4j*86)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*4j*85)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*4j*84)  B20 ? 0 : B2;                      *(pRGBData(height-i-1)*width*4j*87)  alpha2;                      }              }             }          else          {              int alpha  255;              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*2j*4);                      U1  *(pYUVDatai*width*2j*41);                      Y2  *(pYUVDatai*width*2j*42);                      V1  *(pYUVDatai*width*2j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*4j*82)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*4j*81)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*4j*8)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*4j*83)  alpha;                       *(pRGBData(height-i-1)*width*4j*86)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*4j*85)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*4j*84)  B20 ? 0 : B2;                      *(pRGBData(height-i-1)*width*4j*87)  alpha;                   }              }             }      }      else      {          if (alphaYUV)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*3j*4);                      U1  *(pYUVDatai*width*3j*41);                      Y2  *(pYUVDatai*width*3j*42);                      V1  *(pYUVDatai*width*3j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*3j*62)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*3j*61)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*3j*6)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*3j*65)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*3j*64)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*3j*63)  B20 ? 0 : B2;                  }              }          }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      Y1  *(pYUVDatai*width*2j*4);                      U1  *(pYUVDatai*width*2j*41);                      Y2  *(pYUVDatai*width*2j*42);                      V1  *(pYUVDatai*width*2j*43);                      C1  Y1-16;                      C2  Y2-16;                      D1  U1-128;                      E1  V1-128;                      R1  ((298*C1  409*E1  128)8255 ? 255 : (298*C1  409*E1  128)8);                      G1  ((298*C1 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C1 - 100*D1 - 208*E1  128)8);                        B1  ((298*C1516*D1 128)8255 ? 255 : (298*C1516*D1 128)8);                        R2  ((298*C2  409*E1  128)8255 ? 255 : (298*C2  409*E1  128)8);                      G2  ((298*C2 - 100*D1 - 208*E1  128)8255 ? 255 : (298*C2 - 100*D1 - 208*E1  128)8);                      B2  ((298*C2  516*D1 128)8255 ? 255 : (298*C2  516*D1 128)8);                        *(pRGBData(height-i-1)*width*3j*62)  R10 ? 0 : R1;                      *(pRGBData(height-i-1)*width*3j*61)  G10 ? 0 : G1;                      *(pRGBData(height-i-1)*width*3j*6)  B10 ? 0 : B1;                      *(pRGBData(height-i-1)*width*3j*65)  R20 ? 0 : R2;                      *(pRGBData(height-i-1)*width*3j*64)  G20 ? 0 : G2;                      *(pRGBData(height-i-1)*width*3j*63)  B20 ? 0 : B2;                  }              }             }      }      return 0;  }    //  // RGB2YUV  // pRGB         point to the RGB data  // pYUV         point to the YUV data  // width        width of the picture  // height       height of the picture  // alphaYUV     is there an alpha channel in YUV  // alphaRGB     is there an alpha channel in RGB  //  int RGB2YUV(void* pRGB, void* pYUV, int width, int height, bool alphaYUV, bool alphaRGB)  {      if (NULL  pRGB)      {          return -1;      }      unsigned char* pRGBData  (unsigned char *)pRGB;      unsigned char* pYUVData  (unsigned char *)pYUV;      if (NULL  pYUVData)      {          if (alphaYUV)          {              pYUVData  new unsigned char[width*height*3];          }          else              pYUVData  new unsigned char[width*height*2];      }      int R1, G1, B1, R2, G2, B2, Y1, U1, Y2, V1;      int alpha1, alpha2;      if (alphaYUV)      {          if (alphaRGB)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*4j*8);                      G1  *(pRGBData(height-i-1)*width*4j*81);                      R1  *(pRGBData(height-i-1)*width*4j*82);                      alpha1  *(pRGBData(height-i-1)*width*4j*83);                      B2  *(pRGBData(height-i-1)*width*4j*84);                      G2  *(pRGBData(height-i-1)*width*4j*85);                      R2  *(pRGBData(height-i-1)*width*4j*86);                      alpha2  *(pRGBData(height-i-1)*width*4j*87);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*3j*6)  Y1;                      *(pYUVDatai*width*3j*61)  U1;                      *(pYUVDatai*width*3j*62)  Y2;                      *(pYUVDatai*width*3j*63)  V1;                      *(pYUVDatai*width*3j*64)  alpha1;                      *(pYUVDatai*width*3j*65)  alpha2;                  }              }             }          else          {              unsigned char alpha  255;              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*3j*6);                      G1  *(pRGBData(height-i-1)*width*3j*61);                      R1  *(pRGBData(height-i-1)*width*3j*62);                      B2  *(pRGBData(height-i-1)*width*3j*63);                      G2  *(pRGBData(height-i-1)*width*3j*64);                      R2  *(pRGBData(height-i-1)*width*3j*65);                      Y1  ((66*R1129*G125*B1128)8)  16;                      U1  ((-38*R1-74*G1112*B1128)8(-38*R2-74*G2112*B2128)8)/2  128;                      Y2  ((66*R2129*G225*B2128)8)  16;                      V1  ((112*R1-94*G1-18*B1128)8  (112*R2-94*G2-18*B2128)8)/2  128;                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*3j*6)  Y1;                      *(pYUVDatai*width*3j*61)  U1;                      *(pYUVDatai*width*3j*62)  Y2;                      *(pYUVDatai*width*3j*63)  V1;                      *(pYUVDatai*width*3j*64)  alpha;                      *(pYUVDatai*width*3j*65)  alpha;                  }              }             }      }      else      {          if (alphaRGB)          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*4j*8);                      G1  *(pRGBData(height-i-1)*width*4j*81);                      R1  *(pRGBData(height-i-1)*width*4j*82);                      B2  *(pRGBData(height-i-1)*width*4j*84);                      G2  *(pRGBData(height-i-1)*width*4j*85);                      R2  *(pRGBData(height-i-1)*width*4j*86);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*2j*4)  Y1;                      *(pYUVDatai*width*2j*41)  U1;                      *(pYUVDatai*width*2j*42)  Y2;                      *(pYUVDatai*width*2j*43)  V1;                  }              }             }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      B1  *(pRGBData(height-i-1)*width*3j*6);                      G1  *(pRGBData(height-i-1)*width*3j*61);                      R1  *(pRGBData(height-i-1)*width*3j*62);                      B2  *(pRGBData(height-i-1)*width*3j*63);                      G2  *(pRGBData(height-i-1)*width*3j*64);                      R2  *(pRGBData(height-i-1)*width*3j*65);                      Y1  (((66*R1129*G125*B1128)8)  16)  255 ? 255 : (((66*R1129*G125*B1128)8)  16);                      U1  ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128)255 ? 255 : ((((-38*R1-74*G1112*B1128)8)((-38*R2-74*G2112*B2128)8))/2  128);                      Y2  (((66*R2129*G225*B2128)8)  16)255 ? 255 : ((66*R2129*G225*B2128)8)  16;                      V1  ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128)255 ? 255 : ((((112*R1-94*G1-18*B1128)8)  ((112*R2-94*G2-18*B2128)8))/2  128);                      *(pYUVDatai*width*2j*4)  Y1;                      *(pYUVDatai*width*2j*41)  U1;                      *(pYUVDatai*width*2j*42)  Y2;                      *(pYUVDatai*width*2j*43)  V1;                  }              }             }      }      return 0;  }    //  // pGBYUV           point to the background YUV data  // pFGYUV           point to the foreground YUV data  // width            width of the picture  // height           height of the picture  // alphaBG          is there an alpha channel in background YUV data  // alphaFG          is there an alpha channel in fourground YUV data  //  int YUVBlending(void* pBGYUV, void* pFGYUV, int width, int height, bool alphaBG, bool alphaFG)  {      if (NULL  pBGYUV || NULL  pFGYUV)      {          return -1;      }      unsigned char* pBGData  (unsigned char*)pBGYUV;      unsigned char* pFGData  (unsigned char*)pFGYUV;      if (!alphaFG)      {          if (!alphaBG)          {              memcpy(pBGData, pFGData, width*height*2);          }          else          {              for (int i0; iheight; i)              {                  for (int j0; jwidth/2; j)                  {                      *(pBGDatai*width*2j*4)  *(pFGDatai*width*2j*4);                      *(pBGDatai*width*2j*41)  *(pFGDatai*width*2j*41);                      *(pBGDatai*width*2j*42)  *(pFGDatai*width*2j*42);                      *(pBGDatai*width*2j*43)  *(pFGDatai*width*2j*43);                  }              }          }      }      int Y11, U11, V11, Y12, Y21, U21, V21, Y22;      int alpha1, alpha2;      if (!alphaBG)      {          for (int i0; iheight; i)          {              for (int j0; jwidth/2; j)              {                  Y11  *(pBGDatai*width*2j*4);                  U11  *(pBGDatai*width*2j*41);                  Y12  *(pBGDatai*width*2j*42);                  V11  *(pBGDatai*width*2j*43);                    Y21  *(pFGDatai*width*3j*6);                  U21  *(pFGDatai*width*3j*61);                  Y22  *(pFGDatai*width*3j*62);                  V21  *(pFGDatai*width*3j*63);                  alpha1  *(pFGDatai*width*3j*64);                  alpha2  *(pFGDatai*width*3j*65);                    *(pBGDatai*width*2j*4)  (Y21-16)*alpha1/255(Y11-16)*(255-alpha1)/25516;                  *(pBGDatai*width*2j*41)  ((U21-128)*alpha1/255(U11-128)*(255-alpha1)/255  (U21-128)*alpha2/255(U11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*2j*43)  ((V21-128)*alpha1/255(V11-128)*(255-alpha1)/255  (V21-128)*alpha2/255(V11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*2j*42)  (Y22-16)*alpha2/255(Y12-16)*(255-alpha2)/25516;              }          }      }      else      {          for (int i0; iheight; i)          {              for (int j0; jwidth/2; j)              {                  Y11  *(pBGDatai*width*3j*6);                  U11  *(pBGDatai*width*3j*61);                  Y12  *(pBGDatai*width*3j*62);                  V11  *(pBGDatai*width*3j*63);                    Y21  *(pFGDatai*width*3j*6);                  U21  *(pFGDatai*width*3j*61);                  Y22  *(pFGDatai*width*3j*62);                  V21  *(pFGDatai*width*3j*63);                  alpha1  *(pFGDatai*width*3j*64);                  alpha2  *(pFGDatai*width*3j*65);                    *(pBGDatai*width*3j*6)  (Y21-16)*alpha1/255(Y11-16)*(255-alpha1)/25516;                  *(pBGDatai*width*3j*61)  ((U21-128)*alpha1/255(U11-128)*(255-alpha1)/255  (U21-128)*alpha2/255(U11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*3j*63)  ((V21-128)*alpha1/255(V11-128)*(255-alpha1)/255  (V21-128)*alpha2/255(V11-128)*(255-alpha2)/255)/2128;                  *(pBGDatai*width*3j*62)  (Y22-16)*alpha2/255(Y12-16)*(255-alpha2)/25516;              }          }      }      return 0;  }   经测试功能已经实现如有错误或者不妥的地方恳请指出。 mosesyuan at gmail dot com
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