windows 上的 yuv 转RGB 代码_问答

本人技术太菜，过来跟大牛学习的，那就有事没事分享点收集的好用的东东吧
[code]#include
#include
#include

void yuvtorgb(double *, unsigned char *);
void yuv422convertrgb(unsigned char *yuv_ptr,unsigned char *rgb_ptr,int width,int height);

int main()
{
int width = 640;
int height = 480;
int framesize = width * height;
unsigned char* indata = (unsigned char*) malloc (framesize*2*sizeof(char));
unsigned char* outdata = (unsigned char*) malloc ((framesize*3+54)*sizeof(char));
FILE *in,*out;
if((in=fopen("back.yuv","rb"))==NULL)
{
      printf("can't open data.yuv");
   return 0;
}
if ((out = fopen("back.bmp","wb")) == NULL) {
      printf("ERROR: can't write to rgb.bmp");
      return 0;
    }
fread(indata,framesize*2,1,in);
yuv422convertrgb (indata,outdata,width,height);
fwrite(outdata,(framesize*3+54),1,out);
fclose(out);

free(indata);
free(outdata);
return 1;

}

void yuv422convertrgb(unsigned char *yuv_ptr,unsigned char *rgb_ptr,int width,int height)
{
int    i,j,k;
int    framesize_rgb;
double rgb[3];
unsigned char yuv[3];
unsigned char *prgb,*pyuv;

unsigned char bmphead[] = {
                           0x42,0x4d,0x38,0xd2,0x0f,0x00,0x00,0x00,0x00,0x00,0x36,0x00,0x00,0x00,0x28,0x00,
   0x00,0x00,0xD0,0x02,0x00,0x00,0xe0,0x01,0x00,0x00,0x01,0x00,0x18,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00,0x00,0x00,0x12,0x0b,0x00,0x00,0x12,0x0b,0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00,0x00,0x00};

framesize_rgb = width * height * 3 + 54 ;

prgb = rgb_ptr;
for(i=0;i<54;i++)
*prgb++ = bmphead;

pyuv = yuv_ptr;

prgb = rgb_ptr + framesize_rgb - width * 3;
pyuv++;

for(j=0;j {
k = 0;
for(i=1;i {
if( k%2==0 )
{
yuv[0] = *pyuv--;
yuv[1] = *pyuv++;
yuv[2] = *(++pyuv);
pyuv++;
}
else
{
yuv[0] = *pyuv++;
yuv[1] = *pyuv--;
yuv[2] = *(--pyuv);
pyuv++;
pyuv++;
pyuv++;
}
yuvtorgb(rgb,yuv);
*prgb++ = (unsigned char )rgb[2];
*prgb++ = (unsigned char )rgb[1];
*prgb++ = (unsigned char )rgb[0];
}
prgb -= width * 3 * 2;
}
}

void yuvtorgb ( double *rgb,unsigned char *yuv)
{
   int i;
   rgb[0] = 1.0 * yuv[0] + 0 + 1.402 * (yuv[2] - 128);                // r
   rgb[1] = 1.0 * yuv[0] - 0.34413 * (yuv[1] - 128) - 0.71414 * (yuv[2]-128);  // g
   rgb[2] = 1.0 * yuv[0] + 1.772 * (yuv[1]-128) + 0;                         // b
   for(i=0;i<3;i++)
   {
if(rgb>255)
rgb = 255;
if(rgb<0)
rgb = 0;
   }
}[/code]

windows 上的 yuv 转RGB 代码

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