mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-29 20:10:28 -04:00
f511da3c53
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5621 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
314 lines
8.2 KiB
C
314 lines
8.2 KiB
C
/*
|
|
Functions used by wsprsim
|
|
*/
|
|
#include "wsprsim_utils.h"
|
|
#include "wsprd_utils.h"
|
|
#include "nhash.h"
|
|
#include "fano.h"
|
|
|
|
char get_locator_character_code(char ch) {
|
|
if( ch >=48 && ch <=57 ) { //0-9
|
|
return ch-48;
|
|
}
|
|
if( ch == 32 ) { //space
|
|
return 36;
|
|
}
|
|
if( ch >= 65 && ch <= 82 ) { //A-Z
|
|
return ch-65;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
char get_callsign_character_code(char ch) {
|
|
if( ch >=48 && ch <=57 ) { //0-9
|
|
return ch-48;
|
|
}
|
|
if( ch == 32 ) { //space
|
|
return 36;
|
|
}
|
|
if( ch >= 65 && ch <= 90 ) { //A-Z
|
|
return ch-55;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
long unsigned int pack_grid4_power(char *grid4, int power) {
|
|
long unsigned int m;
|
|
|
|
m=(179-10*grid4[0]-grid4[2])*180+10*grid4[1]+grid4[3];
|
|
m=m*128+power+64;
|
|
return m;
|
|
}
|
|
|
|
long unsigned int pack_call(char *callsign) {
|
|
int i;
|
|
long unsigned int n;
|
|
char call6[6];
|
|
memset(call6,32,sizeof(char)*6);
|
|
// callsign is 6 characters in length. Exactly.
|
|
int call_len = strlen(callsign);
|
|
if( call_len > 6 ) {
|
|
return 0;
|
|
}
|
|
if( isdigit(*(callsign+2)) ) {
|
|
for (i=0; i<6; i++) {
|
|
if( callsign[i] == 0 ) {
|
|
call6[i]=32;
|
|
} else {
|
|
call6[i]=*(callsign+i);
|
|
}
|
|
}
|
|
} else if( isdigit(*(callsign+1)) ) {
|
|
for (i=0; i<6; i++) {
|
|
if( i==0 || callsign[i-1]==0 ) {
|
|
call6[i]=32;
|
|
} else {
|
|
call6[i]=*(callsign+i-1);
|
|
}
|
|
}
|
|
}
|
|
for (i=0; i<6; i++) {
|
|
call6[i]=get_callsign_character_code(call6[i]);
|
|
}
|
|
n = call6[0];
|
|
n = n*36+call6[1];
|
|
n = n*10+call6[2];
|
|
n = n*27+call6[3]-10;
|
|
n = n*27+call6[4]-10;
|
|
n = n*27+call6[5]-10;
|
|
return n;
|
|
}
|
|
|
|
void pack_prefix(char *callsign, int32_t *n, int32_t *m, int32_t *nadd ) {
|
|
int i;
|
|
char *call6;
|
|
call6=malloc(sizeof(char)*6);
|
|
memset(call6,32,sizeof(char)*6);
|
|
int i1=strcspn(callsign,"/");
|
|
|
|
if( callsign[i1+2] == 0 ) {
|
|
//single char suffix
|
|
for (i=0; i<i1; i++) {
|
|
call6[i]=callsign[i];
|
|
}
|
|
*n=pack_call(call6);
|
|
*nadd=1;
|
|
int nc = callsign[i1+1];
|
|
if( nc >= 48 && nc <= 57 ) {
|
|
*m=nc-48;
|
|
} else if ( nc >= 65 && nc <= 90 ) {
|
|
*m=nc-65+10;
|
|
} else {
|
|
*m=38;
|
|
}
|
|
*m=60000-32768+*m;
|
|
} else if( callsign[i1+3]==0 ) {
|
|
//two char suffix
|
|
for (i=0; i<i1; i++) {
|
|
call6[i]=callsign[i];
|
|
}
|
|
*n=pack_call(call6);
|
|
*nadd=1;
|
|
*m=10*(callsign[i1+1]-48)+(callsign[i1+2]-48);
|
|
*m=60000 + 26 + *m;
|
|
} else {
|
|
char* pfx=strtok(callsign,"/");
|
|
call6=strtok(NULL," ");
|
|
*n=pack_call(call6);
|
|
int plen=strlen(pfx);
|
|
if( plen ==1 ) {
|
|
*m=36;
|
|
*m=37*(*m)+36;
|
|
} else if( plen == 2 ) {
|
|
*m=36;
|
|
} else {
|
|
*m=0;
|
|
}
|
|
for (i=0; i<plen; i++) {
|
|
int nc = callsign[i];
|
|
if( nc >= 48 && nc <= 57 ) {
|
|
nc=nc-48;
|
|
} else if ( nc >= 65 && nc <= 90 ) {
|
|
nc=nc-65+10;
|
|
} else {
|
|
nc=36;
|
|
}
|
|
*m=37*(*m)+nc;
|
|
}
|
|
*nadd=0;
|
|
if( *m > 32768 ) {
|
|
*m=*m-32768;
|
|
*nadd=1;
|
|
}
|
|
}
|
|
}
|
|
|
|
void interleave(unsigned char *sym)
|
|
{
|
|
unsigned char tmp[162];
|
|
unsigned char p, i, j;
|
|
|
|
p=0;
|
|
i=0;
|
|
while (p<162) {
|
|
j=((i * 0x80200802ULL) & 0x0884422110ULL) * 0x0101010101ULL >> 32;
|
|
if (j < 162 ) {
|
|
tmp[j]=sym[p];
|
|
p=p+1;
|
|
}
|
|
i=i+1;
|
|
}
|
|
for (i=0; i<162; i++) {
|
|
sym[i]=tmp[i];
|
|
}
|
|
}
|
|
|
|
int get_wspr_channel_symbols(char* rawmessage, unsigned char* symbols) {
|
|
int m=0, n=0, ntype=0;
|
|
int i, j, ihash;
|
|
unsigned char pr3[162]=
|
|
{1,1,0,0,0,0,0,0,1,0,0,0,1,1,1,0,0,0,1,0,
|
|
0,1,0,1,1,1,1,0,0,0,0,0,0,0,1,0,0,1,0,1,
|
|
0,0,0,0,0,0,1,0,1,1,0,0,1,1,0,1,0,0,0,1,
|
|
1,0,1,0,0,0,0,1,1,0,1,0,1,0,1,0,1,0,0,1,
|
|
0,0,1,0,1,1,0,0,0,1,1,0,1,0,1,0,0,0,1,0,
|
|
0,0,0,0,1,0,0,1,0,0,1,1,1,0,1,1,0,0,1,1,
|
|
0,1,0,0,0,1,1,1,0,0,0,0,0,1,0,1,0,0,1,1,
|
|
0,0,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,1,1,0,
|
|
0,0};
|
|
int nu[10]={0,-1,1,0,-1,2,1,0,-1,1};
|
|
char *callsign, *grid, *powstr;
|
|
char grid4[5], message[23];
|
|
|
|
memset(message,0,sizeof(char)*23);
|
|
i=0;
|
|
while ( rawmessage[i] != 0 && i<23 ) {
|
|
message[i]=rawmessage[i];
|
|
i++;
|
|
}
|
|
|
|
int i1=strcspn(message," ");
|
|
int i2=strcspn(message,"/");
|
|
int i3=strcspn(message,"<");
|
|
int i4=strcspn(message,">");
|
|
int mlen=strlen(message);
|
|
|
|
// Use the presence and/or absence of "<" and "/" to decide what
|
|
// type of message. No sanity checks! Beware!
|
|
|
|
if( (i1>3) & (i1<7) & (i2==mlen) & (i3==mlen) ) {
|
|
// Type 1 message: K9AN EN50 33
|
|
// xxnxxxx xxnn nn
|
|
callsign = strtok(message," ");
|
|
grid = strtok(NULL," ");
|
|
powstr = strtok(NULL," ");
|
|
int power = atoi(powstr);
|
|
n = pack_call(callsign);
|
|
|
|
for (i=0; i<4; i++) {
|
|
grid4[i]=get_locator_character_code(*(grid+i));
|
|
}
|
|
m = pack_grid4_power(grid4,power);
|
|
|
|
} else if ( i3 == 0 && i4 < mlen ) {
|
|
// Type 3: <K1ABC> EN50WC 33
|
|
// <PJ4/K1ABC> FK52UD 37
|
|
// send hash instead of callsign to make room for 6 char grid.
|
|
// if 4-digit locator is specified, 2 spaces are added to the end.
|
|
callsign=strtok(message,"<> ");
|
|
grid=strtok(NULL," ");
|
|
powstr=strtok(NULL," ");
|
|
int power = atoi(powstr);
|
|
if( power < 0 ) power=0;
|
|
if( power > 60 ) power=60;
|
|
power=power+nu[power%10];
|
|
ntype=-(power+1);
|
|
ihash=nhash(callsign,strlen(callsign),(uint32_t)146);
|
|
m=128*ihash + ntype + 64;
|
|
|
|
char grid6[6];
|
|
memset(grid6,32,sizeof(char)*6);
|
|
j=strlen(grid);
|
|
for(i=0; i<j-1; i++) {
|
|
grid6[i]=grid[i+1];
|
|
}
|
|
grid6[5]=grid[0];
|
|
n=pack_call(grid6);
|
|
} else if ( i2 < mlen ) { // just looks for a right slash
|
|
// Type 2: PJ4/K1ABC 37
|
|
callsign=strtok(message," ");
|
|
if( strlen(callsign) < i2 ) return 0; //guards against pathological case
|
|
powstr=strtok(NULL," ");
|
|
int power = atoi(powstr);
|
|
if( power < 0 ) power=0;
|
|
if( power > 60 ) power=60;
|
|
power=power+nu[power%10];
|
|
int n1, ng, nadd;
|
|
pack_prefix(callsign, &n1, &ng, &nadd);
|
|
ntype=power + 1 + nadd;
|
|
m=128*ng+ntype+64;
|
|
n=n1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
// pack 50 bits + 31 (0) tail bits into 11 bytes
|
|
unsigned char it, data[11];
|
|
memset(data,0,sizeof(char)*11);
|
|
it=0xFF & (n>>20);
|
|
data[0]=it;
|
|
it=0xFF & (n>>12);
|
|
data[1]=it;
|
|
it=0xFF & (n>>4);
|
|
data[2]=it;
|
|
it= ((n&(0x0F))<<4) + ((m>>18)&(0x0F));
|
|
data[3]=it;
|
|
it=0xFF & (m>>10);
|
|
data[4]=it;
|
|
it=0xFF & (m>>2);
|
|
data[5]=it;
|
|
it=(m & 0x03)<<6 ;
|
|
data[6]=it;
|
|
data[7]=0;
|
|
data[8]=0;
|
|
data[9]=0;
|
|
data[10]=0;
|
|
|
|
if( printdata ) {
|
|
printf("Data is :");
|
|
for (i=0; i<11; i++) {
|
|
printf("%02X ",data[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
// make sure that the 11-byte data vector is unpackable
|
|
// unpack it with the routine that the decoder will use and display
|
|
// the result. let the operator decide whether it worked.
|
|
char hashtab[32768][13];
|
|
memset(hashtab,0,sizeof(char)*32768*13);
|
|
|
|
char *check_call_loc_pow, *check_callsign;
|
|
check_call_loc_pow=malloc(sizeof(char)*23);
|
|
check_callsign=malloc(sizeof(char)*13);
|
|
signed char check_data[11];
|
|
memcpy(check_data,data,sizeof(char)*11);
|
|
unpk_(check_data,hashtab,check_call_loc_pow,check_callsign);
|
|
// printf("Will decode as: %s\n",check_call_loc_pow);
|
|
|
|
unsigned int nbytes=11; // The message with tail is packed into 11 bytes.
|
|
unsigned int nencoded=162;
|
|
unsigned char channelbits[nencoded];
|
|
memset(channelbits,0,sizeof(char)*nencoded);
|
|
|
|
encode(channelbits,data,nbytes);
|
|
|
|
interleave(channelbits);
|
|
|
|
for (i=0; i<162; i++) {
|
|
symbols[i]=2*channelbits[i]+pr3[i];
|
|
}
|
|
|
|
return 1;
|
|
}
|