rgb　to　nv12

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我是靠谱客的博主甜美百合，最近开发中收集的这篇文章主要介绍rgb　to　nv12，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include<cmath>

int Convert(char *input, char *output)
{
   int h,v;
   unsigned char * buff_in;
   unsigned char * buff_out;
   unsigned char * buf;

unsigned char r, g, b;
   FILE* in = fopen( input, "rw+" );
   if ( in == NULL ) {
       printf("open file %s failedn", input);
       return -1;
   }

   FILE* out = fopen( output, "w+" );
   if ( in == NULL ) {
       printf("open file %s failedn", output);
       return -1;
   }

   buff_in = (unsigned char *)malloc(1824*944*3);
   buff_out = (unsigned char *)malloc(1824*944*3);
   buf = (unsigned char *)malloc(1824*944*3);

   fread(buff_in, 1824*944*3 ,1 ,in);

   for(v=0;v<944;v++){
       for(h=0;h<1824;h++){
           b= buff_in[v*1824*3+3*h];
           g= buff_in[v*1824*3+3*h+1];
           r= buff_in[v*1824*3+3*h+2];

           buf[v*1824*3+3*h+0] = 0.299*r + 0.587*g + 0.114*b;
           buf[v*1824*3+3*h+1] = -0.169*r - 0.331*g + 0.5 *b + 128;
           buf[v*1824*3+3*h+2] = 0.5 *r - 0.419*g - 0.081*b + 128;
       }
   }

#if 1
   for(v=0;v<472;v++){
       for(h=0;h<912;h++){
           buff_out[1824*944+v*1824+2*h] = buf[v*2*1824*3+3*2*h +1];
           buff_out[1824*944+v*1824+2*h+1]=buf[v*2*1824*3+3*2*h +2];

       }
   }
#endif
   for(v=0;v<944;v++){
       for(h=0;h<1824;h++){
           buff_out[v*1824+h] = buf[v*1824*3+3*h];
       }
   }

   fwrite(buff_out, 1824*944*1.5, 1, out);
   fclose(in);
   fclose(out);
   free(buff_in);
   free(buff_out);

   return 0;
}

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

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

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

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

    return 0;
}