C++读写文件
#include <opencv/cv.h>
#include <fstream>
#include <iostream>
#include <string>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace std;
using namespace cv;
#define W 1280
#define H 720
#define size W*H*2
int main()
{
unsigned char y1, y2, u, v;
char *buffer = new char[size];
string inpath = "C:\Users\liufeng16\Desktop\测试\UVUY\yuv3_5";
string outpath = "C:\Users\liufeng16\Desktop\测试\UVUY\yuv0_5_outliufeng";
ifstream filein(inpath);
ofstream fileout(outpath);//结果
filein.read(buffer, size);
fileout.write(buffer, size);
for (int m = 0; m < W*H; m += 2)
{
u = buffer[m * 2];
y1 = buffer[m * 2 + 1];
v = buffer[m * 2 + 2];
y2 = buffer[m * 2 + 3];
fileout << y1;
fileout << u;
fileout << y2;
fileout << v;
}
filein.close();
fileout.close();
return 0;
}
c读写文件
#include <windows.h>
#include <fstream>
#include <iostream>
#include <string>
#include <iomanip>//不要忘记包含此头文件
#include <stdio.h>
using namespace std;
int main()
{
char *InputPath = "C:\Users\liufeng16\Desktop\测试\UVUY\yuv3_5";
char *OutputPath = "C:\Users\liufeng16\Desktop\测试\UVUY\yuv3_5.yuv";
char *InputBuf = new char[1280*720*2];
char *OutputBuf = new char[1280*720*2];
FILE *fpin,*fpout;
if( ( fpin = fopen(InputPath, "rb")) == NULL)
{
exit(0);
}
if ((fpout = fopen(OutputPath, "w+")) == NULL)
{
exit(0);
}
fread(InputBuf, 1, 1280 * 720 * 2, fpin);
strcpy(OutputBuf, InputBuf);
fwrite(InputBuf,1, 1280 * 720 * 2,fpout);
//cout << InputBuf;
fclose(fpin);
fclose(fpout);
return 0;
}
void YUYV_To_RGB(char * inputpath, char * outputpath)
{
long Start, End, Size;
unsigned char y1, y2, u, v;
unsigned char r1, g1, b1;
unsigned char r2, g2, b2;
unsigned char *buffer = new unsigned char[Hight*Width * 2];
Mat rgbimg(Hight, Width, CV_8UC3);
ifstream Filein(inputpath, ios::in | ios::binary);
Filein.seekg(0, ios::beg);//头
Start = Filein.tellg();//头地址
Filein.seekg(0, ios::end);//尾
End = Filein.tellg();//尾地址
Size = End - Start;
Filein.seekg(0, ios::beg);//头
if(!(Size % (Width*Hight)))
{
Filein.read((char *)buffer, Hight*Width * 2);
Filein.close();
for (int m = 0; m < Hight*Width; m += 2)
{
//YUYV
y1 = buffer[m * 2 + 0];
y2 = buffer[m * 2 + 2];
u = buffer[m * 2 + 1];
v = buffer[m * 2 + 3];
r1 = CYCbCr2R(y1, u, v);
g1 = CYCbCr2G(y1, u, v);
b1 = CYCbCr2B(y1, u, v);
rgbimg.data[m * 3 + 0] = b1;
rgbimg.data[m * 3 + 1] = g1;
rgbimg.data[m * 3 + 2] = r1;
r2 = CYCbCr2R(y2, u, v);
g2 = CYCbCr2G(y2, u, v);
b2 = CYCbCr2B(y2, u, v);
rgbimg.data[m * 3 + 3] = b2;
rgbimg.data[m * 3 + 4] = g2;
rgbimg.data[m * 3 + 5] = r2;
}
ofstream Fileout(outputpath, ios::out | ios::binary);//结果
imwrite(outputpath, rgbimg);
Fileout.close();
}
// imshow("【原始图】", rgbimg);
}