nv12_to_jpg

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我是靠谱客的博主高兴康乃馨，最近开发中收集的这篇文章主要介绍nv12_to_jpg，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <getopt.h>
#include <drm/drm_fourcc.h>
#include <basetypes.h>
#include <string>

using namespace std;
#include "opencv/highgui.h"
#ifndef PIXELVAL
#define PIXELVAL(x) (x < 0 ? 0 : (x > 255 ? 255 : x))
#endif

void met_image_CvtNV12toBGR(unsigned char *bgrData, unsigned char *nv12Data, int width, int height)
{

}
int Convert(char *input, char *output)
{
cv::Mat biggerImage(1080, 3520, CV_8UC3);

   int h,v;
   unsigned char * buff_in;
   unsigned char * buff_out;

   FILE* in = fopen( input, "rw+" );
   if ( in == NULL ) {
       printf("to_bj: open file %s failedn", input);
       return -1;
   }

buff_in = (unsigned char *)malloc(3520*1080*1.5);
buff_out = (unsigned char *)malloc(3520*1080*3);

   fread(buff_in, 3520*1080*1.5 ,1 ,in);

   met_image_CvtNV12toBGR(buff_out, buff_in,3520,1080);

   for(v=0;v<1080;v++){
       for(h=0;h<3520;h++){
           //biggerImage.at<Vec3b>(v, h)[0] =    buff_out[3520*v*3+3*h];
           //biggerImage.at<Vec3b>(v, h)[1] =    buff_out[3520*v*3+3*h+1];
           //biggerImage.at<Vec3b>(v, h)[2] =    buff_out[3520*v*3+3*h+2];
           biggerImage.at<cv::Vec3b>(v, h) = cv::Vec3f( buff_out[3520*v*3+3*h], buff_out[3520*v*3+3*h+1], buff_out[3520*v*3+3*h+2]);
       }
   }

   vector<int> compression_params;
   compression_params.push_back(CV_IMWRITE_JPEG_QUALITY); //选择jpeg
   compression_params.push_back(100);

   cv::imwrite(output,biggerImage,compression_params);
   fclose(in);
   free(buff_in);
   free(buff_out);
   return 0;
}

int main(int argc, char **argv)
{
if(argc < 2)
printf("to_bj: please input read filen");

    char *input_name = argv[1];
   printf("to_bj: input file name:%s n", input_name);

    char *output_name = argv[2];
   printf("to_bj: output file name:%s n", output_name);

    int ret = Convert(input_name, output_name);
    if(ret < 0)
        printf("to_bj: convert failed!n");

return 0;
}