YUY2转RGB 的各种版本

//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;

}

}

//上面的转换后颜色不对；

// 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;

}