YUY2视频转化RGB格式

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[cpp] view plain copy//YUY2视频转化RGB格式 by hardy 2007-10-17  //http://www.fourcc.org/fccyvrgb.php  inline void YUY2_RGB(BYTE *YUY2buff,BYTE *RGBbuff,DWORD dwSize)  {   //B = 1.164(Y - 16)         + 2.018(U - 128)   //G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128)   //R = 1.164(Y - 16) + 1.596(V - 128)   BYTE *orgRGBbuff = RGBbuff;   for(DWORD count=0;count<dwSize;count+=4)   {    //Y0 U0 Y1 V0    float Y0 = *YUY2buff;    float U = *(++YUY2buff);    float Y1 = *(++YUY2buff);    float V = *(++YUY2buff);    ++YUY2buff;    *(RGBbuff) =   (BYTE)(Y0 + (1.370705 * (V-128)));              *(++RGBbuff) = (BYTE)(Y0 - (0.698001 * (V-128)) - (0.337633 * (U-128)));      *(++RGBbuff) = (BYTE)(Y0 + (1.732446 * (U-128)));            *(++RGBbuff) = (BYTE)(Y1 + (1.370705 * (V-128)));              *(++RGBbuff) = (BYTE)(Y1 - (0.698001 * (V-128)) - (0.337633 * (U-128)));      *(++RGBbuff) = (BYTE)(Y1 + (1.732446 * (U-128)));            ++RGBbuff;   }  }  inline void YUY2_RGB2(BYTE *YUY2buff,BYTE *RGBbuff,DWORD dwSize)  {  //R = Y + 1.14V  //G = Y - 0.39U - 0.58V  //B = Y + 2.03U  // R = Y + 1.403V'  //G = Y - 0.344U' - 0.714V'  //B = Y + 1.770U'   BYTE *orgRGBbuff = RGBbuff;   for(DWORD count=0;count<dwSize;count+=4)   {    //Y0 U0 Y1 V0    float Y0 = *YUY2buff;    float U = *(++YUY2buff);    float Y1 = *(++YUY2buff);    float V = *(++YUY2buff);    ++YUY2buff;    float R,G,B;        R = (Y0 + 1.14f*V);    G=(Y0 - 0.39f*U-0.58f*V);      B=(Y0 +2.03f*U);    if(R<0) R =0;    if(R>255) R=255;    if(G<0) G =0;    if(G>255) G=255;    if(B<0) B =0;    if(B>255) B=255;    *(RGBbuff) =     (BYTE)B;             *(++RGBbuff) =  (BYTE)G;    *(++RGBbuff) =  (BYTE)R;    R = (Y1 + 1.14f*V);    G=(Y1 - 0.39f*U-0.58f*V);      B=(Y1 +2.03f*U)   ;    if(R<0) R =0;    if(R>255) R=255;    if(G<0) G =0;    if(G>255) G=255;    if(B<0) B =0;    if(B>255) B=255;    *(++RGBbuff) =     (BYTE)B;             *(++RGBbuff) =  (BYTE)G;    *(++RGBbuff) =  (BYTE)R;    ++RGBbuff;   }  }  inline void YUY2_RGB4(BYTE *YUY2buff,BYTE *RGBbuff,DWORD dwSize)  {    // R = Y + 1.403V'  //G = Y - 0.344U' - 0.714V'  //B = Y + 1.770U'   BYTE *orgRGBbuff = RGBbuff;   for(DWORD count=0;count<dwSize;count+=4)   {    //Y0 U0 Y1 V0    float Y0 = *YUY2buff;    float U = *(++YUY2buff);    float Y1 = *(++YUY2buff);    float V = *(++YUY2buff);    ++YUY2buff;    float R,G,B;        R = (Y0 + 1.403f*V);    G=(Y0 - 0.344f*U-0.714f*V);      B=(Y0 +1.77f*U);    if(R<0) R =0;    if(R>255) R=255;    if(G<0) G =0;    if(G>255) G=255;    if(B<0) B =0;    if(B>255) B=255;    *(RGBbuff) =     (BYTE)R;             *(++RGBbuff) =  (BYTE)G;    *(++RGBbuff) =  (BYTE)B;    R = (Y1 + 1.403f*V);    G=(Y1 - 0.344f*U-0.714f*V);      B=(Y1 +1.77f*U);    if(R<0) R =0;    if(R>255) R=255;    if(G<0) G =0;    if(G>255) G=255;    if(B<0) B =0;    if(B>255) B=255;    *(++RGBbuff) =     (BYTE)R;             *(++RGBbuff) =  (BYTE)G;    *(++RGBbuff) =  (BYTE)B;    ++RGBbuff;   }  }  inline void YUY2_RGB3(BYTE *YUY2buff,BYTE *RGBbuff,DWORD dwSize)  {   //B = 1.164(Y - 16)         + 2.018(U - 128)   //G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128)   //R = 1.164(Y - 16) + 1.596(V - 128)   BYTE *orgRGBbuff = RGBbuff;   for(DWORD count=0;count<dwSize;count+=4)   {    //Y0 U0 Y1 V0    float Y0 = *YUY2buff;    float U = *(++YUY2buff);    float Y1 = *(++YUY2buff);    float V = *(++YUY2buff);    ++YUY2buff;    *(RGBbuff) =   (BYTE)(1.164f*(Y0 - 16)+ 2.018f*(U - 128));              *(++RGBbuff) = (BYTE)(1.164f*(Y0 - 16) - 0.813f*(V - 128) - 0.391f*(U - 128));      *(++RGBbuff) = (BYTE)(1.164f*(Y0 - 16) + 1.596f*(V - 128));            *(++RGBbuff) =   (BYTE)(1.164f*(Y0 - 16)+ 2.018f*(U - 128));              *(++RGBbuff) = (BYTE)(1.164f*(Y0 - 16) - 0.813f*(V - 128) - 0.391f*(U - 128));      *(++RGBbuff) = (BYTE)(1.164f*(Y0 - 16) + 1.596f*(V - 128));             ++RGBbuff;       }  }  // http://msdn2.microsoft.com/en-us/library/ms893078.aspx  void VC4000Graber::YUY2_RGB(BYTE *YUY2buff,BYTE *RGBbuff,DWORD dwSize)  {  //  //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)   BYTE *orgRGBbuff = RGBbuff;   for(DWORD count=0;count<dwSize;count+=4)   {    //Y0 U0 Y1 V0    BYTE Y0 = *YUY2buff;    BYTE U = *(++YUY2buff);    BYTE Y1 = *(++YUY2buff);    BYTE V = *(++YUY2buff);    ++YUY2buff;    LONG Y,C,D,E;    BYTE R,G,B;        Y = Y0;    C = Y-16;    D = U-128;    E = V-128;    R = clip255(( 298 * C           + 409 * E + 128) >> 8);    G = clip255(( 298 * C - 100 * D - 208 * E + 128) >> 8);    B = clip255(( 298 * C + 516 * D           + 128) >> 8);    *(RGBbuff) =   B;              *(++RGBbuff) = G;      *(++RGBbuff) = R;            Y = Y1;    C = Y-16;    D = U-128;    E = V-128;    R = clip255(( 298 * C           + 409 * E + 128) >> 8);    G = clip255(( 298 * C - 100 * D - 208 * E + 128) >> 8);    B = clip255(( 298 * C + 516 * D           + 128) >> 8);    *(++RGBbuff) =   B;              *(++RGBbuff) = G;      *(++RGBbuff) = R;            ++RGBbuff;       }  }  BYTE VC4000Graber::clip255(LONG v)  {   if(v<0) v=0;   else if(v>255) v=255;   return (BYTE)v;  }

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