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