【转码】RGB24 转 YUV420 出错

[wlcshh]

代码如下

int ConvertRGB2YUV(int w,int h,unsigned char *bmp,unsigned int *yuv){
	unsigned int *u,*v,*y,*uu,*vv;
	unsigned int *pu1,*pu2,*pu3,*pu4;
	unsigned int *pv1,*pv2,*pv3,*pv4;
	unsigned char *r,*g,*b;
	int i,j;
	
	uu=new unsigned int[w*h];
	vv=new unsigned int[w*h];
	
	if(uu==NULL || vv==NULL)
		return 0;
	
	y=yuv;
	u=uu;
	v=vv;
	
	// Get r,g,b pointers from bmp image data....
	r=bmp;
	g=bmp+1;
	b=bmp+2;
	
	//Get YUV values for rgb values...
	for(i=0;i<h;i++){	
		for(j=0;j<w;j++){
			*(y++) = ( RGB2YUV_YR[*r]   + RGB2YUV_YG[*g] + RGB2YUV_YB[*b]   + 1048576) >> 16;////调试运行到此处就中断了///////////////////////////////////////////////////
			*(u++) = (-RGB2YUV_UR[*r]   - RGB2YUV_UG[*g] + RGB2YUV_UBVR[*b] + 8388608) >> 16;
			*(v++) = ( RGB2YUV_UBVR[*r] - RGB2YUV_VG[*g] - RGB2YUV_VB[*b]   + 8388608) >> 16;
			r += 3;
			g += 3;
			b += 3;
		}
	}	
	// Now sample the U & V to obtain YUV 4:2:0 format
	// Sampling mechanism...

	// Get the right pointers...
	u=yuv+w*h;
	v=u+(w*h)/4;

	// For U
	pu1=uu;
	pu2=pu1+1;
	pu3=pu1+w;
	pu4=pu3+1;

	// For V
	pv1=vv;
	pv2=pv1+1;
	pv3=pv1+w;
	pv4=pv3+1;

	// Do sampling....
	for(i=0;i<h;i+=2){	
		for(j=0;j<w;j+=2){
			*u++=(*pu1+*pu2+*pu3+*pu4)>>2;
			*v++=(*pv1+*pv2+*pv3+*pv4)>>2;
			pu1+=2;
			pu2+=2;
			pu3+=2;
			pu4+=2;
			pv1+=2;
			pv2+=2;
			pv3+=2;
			pv4+=2;
		}
		pu1+=w;
		pu2+=w;
		pu3+=w;
		pu4+=w;	

		pv1+=w;
		pv2+=w;
		pv3+=w;
		pv4+=w;		
	}
	delete uu;
	delete vv;
	return 1;
}

[wlcshh]

运行到26行：

*(y++) = ( RGB2YUV_YR[*r]   + RGB2YUV_YG[*g] + RGB2YUV_YB[*b]   + 1048576) >> 16;//调试到这里就中断了

这到底是为什么

[伪装者1982]

转换直接用swscale吧，谁还自己写啊，要嫌库大了把代码直接拷出来把