WSJT-X/lib/sfrsd/rstest.c

134 lines
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/*
./jt65code "Hi there"
Message Decoded Err? Type
--------------------------------------------------------------------------
1. HI THERE HI THERE 6: Free text
Packed message, 6-bit symbols 25 57 1 8 29 22 61 14 46 15 56 28
Information-carrying channel symbols
34 27 12 48 28 59 12 38 25 47 21 40 46 9 12 24 36 7 4 15 49
50 6 49 56 2 19 15 7 59 22 7 5 14 20 3 29 56 2 9 17 14
45 26 43 31 17 10 50 31 2 25 57 1 8 29 22 61 14 46 15 56 28
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "rs.h"
#include "init_random_seed.h"
static void *rs;
int main(){
int hi_there[]={25,57,1,8,29,22,61,14,46,15,56,28};
int data[12], revdat[12];
int parity[51];
int rxdat[63], errlocs[63];
int era_pos[51];
int i, numera, nerr, nn=63;
FILE *datfile;
//nsec,xlambda,maxe,nads,mrsym,mrprob,mr2sym,mr2prob
int nsec, maxe, nads;
float xlambda;
int mrsym[63],mrprob[63],mr2sym[63],mr2prob[63];
int nsec2,ncount,dat4[12];
init_random_seed();
datfile=fopen("kvasd.dat","rb");
if( !datfile ) {
printf("Unable to open kvasd.dat\n");
return 1;
} else {
fread(&nsec,sizeof(int),1,datfile);
fread(&xlambda,sizeof(float),1,datfile);
fread(&maxe,sizeof(int),1,datfile);
fread(&nads,sizeof(int),1,datfile);
fread(&mrsym,sizeof(int),63,datfile);
fread(&mrprob,sizeof(int),63,datfile);
fread(&mr2sym,sizeof(int),63,datfile);
fread(&mr2prob,sizeof(int),63,datfile);
fread(&nsec2,sizeof(int),1,datfile);
fread(&ncount,sizeof(int),1,datfile);
fread(&dat4,sizeof(int),12,datfile);
fclose(datfile);
printf("%d %f %d %d \n",nsec,xlambda,maxe,nads);
for (i=0; i<63; i++) printf("%d ",mrsym[i]);
printf("\n");
// for (i=0; i<63; i++) printf("%d ",mrprob[i]);
// printf("\n");
// for (i=0; i<63; i++) printf("%d ",mr2sym[i]);
// printf("\n");
// for (i=0; i<63; i++) printf("%d ",mr2prob[i]);
// printf("\n");
// printf("%d %d \n",nsec2,ncount);
printf("kv decode: ");
for (i=0; i<12; i++) printf("%d ",dat4[i]);
printf("\n");
}
// initialize the ka9q reed solomon encoder/decoder
unsigned int symsize=6, gfpoly=0x43, fcr=3, prim=1, nroots=51;
rs=init_rs_int(symsize, gfpoly, fcr, prim, nroots, 0);
// copy the 'hi there' message to the data vector
// memcpy(data,hi_there,sizeof(hi_there));
// memcpy(data,dat4,sizeof(dat4));
// printf("data symbols\n");
// for( i=0; i<12; i++) {
// revdat[i]=data[11-i];
// printf("%d ",data[i]);
// }
// printf("\n");
// encode_rs_int(rs,revdat,parity);
//set up the received symbol vector
// for( i=0; i<63; i++ ) {
// if( i < 12 ) rxdat[i]=revdat[i];
// if( i >=12 ) rxdat[i]=parity[i-12];
// }
/*
int errval, errloc;
int num_errors=0;
printf("num_errors = %d\n",num_errors);
for( i=0; i<num_errors; i++) {
do {
errval = rand() & nn;
} while(errval == 0); //generate random
do {
errloc = rand() % nn;
} while(errlocs[errloc]!=0);
errlocs[errloc] = errval;
rxdat[errloc] ^= errval;
}
*/
numera=0;
printf("channel symbols\n");
for( i=0; i<63; i++ ) {
rxdat[i]=mrsym[i];
printf("%d ",rxdat[i]);
}
printf("\n");
nerr=decode_rs_int(rs,rxdat,era_pos,numera);
printf("nerr %d\n",nerr);
printf("decoded data\n");
for(i=0; i<63; i++) printf("%d ",rxdat[i]);
printf("\n");
exit(0);
}