Sensei 2 - audio patch

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>


typedef struct { char filename[12] ; int address;} test;

int main(void){

pid_t childPID;

FILE * fi;
FILE * fo;
FILE * ft;

test casa[4000];
int dboffset[4000];

int i,j;
int offset;
int status;

fi=fopen("VOICE","r");
fo=fopen("VOICE.out","w");

/*primero 2 bytes*/
putc(getc(fi),fo);
putc(getc(fi),fo);

fread(&casa,sizeof(test),4000,fi);

i=0;

do{
  fwrite(&casa[i],sizeof(test),1,fo);
} while (casa[i++].filename[0] != '\0');

fflush(fo);

i=-1;
while (casa[++i].filename[0] != '\0'){

//printf("break");
//getchar();

  lseek(fileno(fi), casa[i].address , SEEK_SET);
  dboffset[i]=(int) ftell(fo);

  if ( fork() == 0){
//    dup2( fileno(fo), STDOUT_FILENO);
    dup2( fileno(fi), STDIN_FILENO);
    execl( "/usr/bin/ffmpeg","/usr/bin/ffmpeg","-i", "-", "-y","/dev/shm/tmp.wav");
  }
  wait(&status);
  ft=fopen("/dev/shm/tmp.wav","r");
  while( EOF != (j=fgetc(ft)))
    fputc(j,fo);
  fclose(ft);
}
//offset de la linea en blanco
  dboffset[i]=(int) ftell(fo);


i=0;

do{
  printf("dboffset %x\n", dboffset[i]);
  offset=(size_t) &casa[i].address - (size_t) &casa + 2;
  fflush(fo);
  fseek(fo, offset, SEEK_SET);
  fwrite(&(dboffset[i]),sizeof(int),1,fo);
} while (casa[i++].filename[0] != '\0');

fclose(fi);
fclose(fo);

rename("VOICE","VOICE.bk");
rename("VOICE.out","VOICE");
return 0;
}