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RS-tracker/mrz/mp3h1.c

1086 wiersze
29 KiB
C
Czysty Bezpośredni odnośnik Wina Historia

/*
* (unknown (26702) 2021-02-19)
* radiosonde "MP3-H1" (WMO translit: "MRZ-N1")
* author: zilog80
*
* compile:
* gcc mp3h1.c -lm -o mp3h1
* usage:
* ./mp3h1 -v [-b2] fm_audio.wav
* (inverse polarity: -i)
*
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#ifdef CYGWIN
#include <fcntl.h> // cygwin: _setmode()
#include <io.h>
#endif
// optional JSON "version"
// (a) set global
// gcc -DVERSION_JSN [-I<inc_dir>] ...
#ifdef VERSION_JSN
#include "version_jsn.h"
#endif
// or
// (b) set local compiler option, e.g.
// gcc -DVER_JSN_STR=\"0.0.2\" ...
#define TIMEOUT_JSN 60
typedef unsigned char ui8_t;
typedef unsigned int ui32_t;
typedef unsigned short ui16_t;
typedef short i16_t;
typedef int i32_t;
#define BITFRAME_LEN ((51*16)/2) // 52..53: AA AA (1..5) or 00 00 (6)
#define RAWBITFRAME_LEN (BITFRAME_LEN*2)
#define FRAMESTART (HEADOFS+HEADLEN)
#define FRAME_LEN (BITFRAME_LEN/8)
typedef struct {
ui8_t subcnt1;
ui8_t subcnt2;
//int frnr;
int yr; int mth; int day;
int hrs; int min; int sec;
double lat; double lon; double alt;
double vH; double vD; double vV;
ui8_t numSats;
float calA;
float calB;
float calC;
ui8_t frame[FRAME_LEN+16];
ui32_t cfg[16];
ui32_t snC;
ui32_t snD;
ui8_t crcOK;
//
int sec_day;
int sec_day_prev;
int gps_cnt;
int gps_cnt_prev;
int week;
int jsn_freq; // freq/kHz (SDR)
} gpx_t;
static int bits_ofs = 8;
#define HEADLEN 44
#define HEADOFS 0
//Preamble
//header[] = "10011001100110011001""10101010"; // 28, ofs=0
static char header[] = "100110011001100110011001100110011001""10101010";
// each frame 6x
// AA BF 35 ........ AA AA
// AA BF 35 ........ AA AA
// AA BF 35 ........ AA AA
// AA BF 35 ........ AA AA
// AA BF 35 ........ AA AA
// AA BF 35 ........ 00 00
static char buf[HEADLEN+1] = "xxxxxxxxxx\0";
static int bufpos = -1;
static char frame_rawbits[RAWBITFRAME_LEN+8];
static char frame_bits[BITFRAME_LEN+4];
static int option_verbose = 0, // ausfuehrliche Anzeige
option_raw = 0, // rohe Frames
option_inv = 0, // invertiert Signal
option_auto = 0,
option_avg = 0, // moving average
option_b = 0,
option_ecc = 0,
option_ptu = 0,
option_dbg = 0,
option_jsn = 0,
option_uniq = 0,
wavloaded = 0;
static int wav_channel = 0; // audio channel: left
static int ptu_out = 0;
static int start = 0;
/* -------------------------------------------------------------------------- */
static int MANCH = 1;
// option_b: exakte Baudrate wichtig!
// eventuell in header ermittelbar
#define BAUD_RATE 2399 //2400
static int sample_rate = 0, bits_sample = 0, channels = 0;
static float samples_per_bit = 0;
static int findstr(char *buff, char *str, int pos) {
int i;
for (i = 0; i < 4; i++) {
if (buff[(pos+i)%4] != str[i]) break;
}
return i;
}
static int read_wav_header(FILE *fp) {
char txt[4+1] = "\0\0\0\0";
unsigned char dat[4];
int byte, p=0;
if (fread(txt, 1, 4, fp) < 4) return -1;
if (strncmp(txt, "RIFF", 4) && strncmp(txt, "RF64", 4)) return -1;
if (fread(txt, 1, 4, fp) < 4) return -1;
// pos_WAVE = 8L
if (fread(txt, 1, 4, fp) < 4) return -1;
if (strncmp(txt, "WAVE", 4)) return -1;
// pos_fmt = 12L
for ( ; ; ) {
if ( (byte=fgetc(fp)) == EOF ) return -1;
txt[p % 4] = byte;
p++; if (p==4) p=0;
if (findstr(txt, "fmt ", p) == 4) break;
}
if (fread(dat, 1, 4, fp) < 4) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
channels = dat[0] + (dat[1] << 8);
if (fread(dat, 1, 4, fp) < 4) return -1;
memcpy(&sample_rate, dat, 4); //sample_rate = dat[0]|(dat[1]<<8)|(dat[2]<<16)|(dat[3]<<24);
if (fread(dat, 1, 4, fp) < 4) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
//byte = dat[0] + (dat[1] << 8);
if (fread(dat, 1, 2, fp) < 2) return -1;
bits_sample = dat[0] + (dat[1] << 8);
// pos_dat = 36L + info
for ( ; ; ) {
if ( (byte=fgetc(fp)) == EOF ) return -1;
txt[p % 4] = byte;
p++; if (p==4) p=0;
if (findstr(txt, "data", p) == 4) break;
}
if (fread(dat, 1, 4, fp) < 4) return -1;
fprintf(stderr, "sample_rate: %d\n", sample_rate);
fprintf(stderr, "bits : %d\n", bits_sample);
fprintf(stderr, "channels : %d\n", channels);
if (bits_sample != 8 && bits_sample != 16 && bits_sample != 32) return -1;
samples_per_bit = sample_rate/(float)BAUD_RATE;
fprintf(stderr, "samples/bit: %.2f\n", samples_per_bit);
return 0;
}
static unsigned long sample_count = 0;
static int f32read_sample(FILE *fp, float *s) {
int i;
unsigned int word = 0;
short *b = (short*)&word;
float *f = (float*)&word;
for (i = 0; i < channels; i++) {
if (fread( &word, bits_sample/8, 1, fp) != 1) return EOF;
if (i == wav_channel) { // i = 0: links bzw. mono
//if (bits_sample == 8) sint = b-128; // 8bit: 00..FF, centerpoint 0x80=128
//if (bits_sample == 16) sint = (short)b;
if (bits_sample == 32) {
*s = *f;
}
else {
if (bits_sample == 8) { *b -= 128; }
*s = *b/128.0;
if (bits_sample == 16) { *s /= 256.0; }
}
}
}
sample_count++;
return 0;
}
static int par=1, par_alt=1;
static int read_bits_fsk(FILE *fp, int *bit, int *len) {
static float sample;
int n;
float l;
n = 0;
do {
if ( f32read_sample(fp, &sample) == EOF ) return EOF;
par_alt = par;
par = (sample >= 0.0f) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
n++;
} while (par*par_alt > 0);
l = (float)n / samples_per_bit;
*len = (int)(l+0.5);
if (!option_inv) *bit = (1+par_alt)/2; // oben 1, unten -1
else *bit = (1-par_alt)/2; // sdr#<rev1381?, invers: unten 1, oben -1
// *bit = (1+inv*par_alt)/2; // ausser inv=0
/* Y-offset ? */
return 0;
}
static int bitstart = 0;
static double bitgrenze = 0;
static unsigned long scount = 0;
static int read_rawbit(FILE *fp, int *bit) {
float sample;
float sum;
sum = 0.0f;
if (bitstart) {
scount = 0; // eigentlich scount = 1
bitgrenze = 0; // oder bitgrenze = -1
bitstart = 0;
}
bitgrenze += samples_per_bit;
do {
if ( f32read_sample(fp, &sample) == EOF ) return EOF;
//sample_count++; // in f32read_sample()
//par = (sample >= 0.0f) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
sum += sample;
scount++;
} while (scount < bitgrenze); // n < samples_per_bit
if (sum >= 0.0f) *bit = 1;
else *bit = 0;
if (option_inv) *bit ^= 1;
return 0;
}
static int read_rawbit2(FILE *fp, int *bit) {
float sample;
float sum;
sum = 0.0f;
if (bitstart) {
scount = 0; // eigentlich scount = 1
bitgrenze = 0; // oder bitgrenze = -1
bitstart = 0;
}
bitgrenze += samples_per_bit;
do {
if ( f32read_sample(fp, &sample) == EOF ) return EOF;
//sample_count++; // in f32read_sample()
//par = (sample >= 0.0f) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
sum += sample;
scount++;
} while (scount < bitgrenze); // n < samples_per_bit
bitgrenze += samples_per_bit;
do {
if ( f32read_sample(fp, &sample) == EOF ) return EOF;
//sample_count++; // in f32read_sample()
//par = (sample >= 0.0f) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
sum -= sample;
scount++;
} while (scount < bitgrenze); // n < samples_per_bit
if (sum >= 0) *bit = 1;
else *bit = 0;
if (MANCH == 2) *bit ^= 1;
if (option_inv) *bit ^= 1;
return 0;
}
/* -------------------------------------------------------------------------- */
static void inc_bufpos() {
bufpos = (bufpos+1) % HEADLEN;
}
static char cb_inv(char c) {
if (c == '0') return '1';
if (c == '1') return '0';
return c;
}
// Gefahr bei Manchester-Codierung: inverser Header wird leicht fehl-erkannt
// da manchester1 und manchester2 nur um 1 bit verschoben
static int compare2() {
int i, j;
i = 0;
j = bufpos;
while (i < HEADLEN) {
if (j < 0) j = HEADLEN-1;
if (buf[j] != header[HEADOFS+HEADLEN-1-i]) break;
j--;
i++;
}
if (i == HEADLEN) return 1;
if (option_auto) {
i = 0;
j = bufpos;
while (i < HEADLEN) {
if (j < 0) j = HEADLEN-1;
if (buf[j] != cb_inv(header[HEADOFS+HEADLEN-1-i])) break;
j--;
i++;
}
if (i == HEADLEN) return -1;
}
return 0;
}
// manchester1 1->10,0->01: 1.bit
// manchester2 0->10,1->01: 2.bit
static void manchester1(char* frame_rawbits, char *frame_bits, int pos) {
int i, c, out, buf;
char bit, bits[2];
c = 0;
for (i = 0; i < pos/2; i++) { // -16
bits[0] = frame_rawbits[2*i];
bits[1] = frame_rawbits[2*i+1];
if ((bits[0] == '0') && (bits[1] == '1')) { bit = '0'; out = 1; }
else
if ((bits[0] == '1') && (bits[1] == '0')) { bit = '1'; out = 1; }
else { //
if (buf == 0) { c = !c; out = 0; buf = 1; }
else { bit = 'x'; out = 1; buf = 0; }
}
if (out) frame_bits[i] = bit;
}
}
static void manchester2(char* frame_rawbits, char *frame_bits, int pos) {
int i, c, out, buf;
char bit, bits[2];
c = 0;
for (i = 0; i < pos/2; i++) { // -16
bits[0] = frame_rawbits[2*i];
bits[1] = frame_rawbits[2*i+1];
if ((bits[0] == '0') && (bits[1] == '1')) { bit = '1'; out = 1; }
else
if ((bits[0] == '1') && (bits[1] == '0')) { bit = '0'; out = 1; }
else { //
if (buf == 0) { c = !c; out = 0; buf = 1; }
else { bit = 'x'; out = 1; buf = 0; }
}
if (out) frame_bits[i] = bit;
}
}
static void manchester(char* frame_rawbits, char *frame_bits, int pos) {
if (MANCH == 1) {
manchester1(frame_rawbits, frame_bits, pos);
}
else {
manchester2(frame_rawbits, frame_bits, pos);
}
}
static int bits2bytes(char *bitstr, ui8_t *bytes, int len) {
int i, bit, d, byteval;
int bitpos, bytepos;
bitpos = 0;
bytepos = 0;
while (bytepos < len) {
byteval = 0;
d = 1;
for (i = 0; i < 8; i++) {
//bit = *(bitstr+bitpos+i); /* little endian */
bit = *(bitstr+bitpos+7-i); /* big endian */
if (bit == '\0') goto frame_end;
if (bit == '1') byteval += d;
else /*if ((bit == '0') */ byteval += 0;
d <<= 1;
}
bitpos += 8;
bytes[bytepos++] = byteval;
}
frame_end:
for (i = bytepos; i < FRAME_LEN; i++) bytes[i] = 0;
return bytepos;
}
/* ------------------------------------------------------------------------------------ */
static int datetime2GPSweek(int yy, int mm, int dd,
int hr, int min, int sec,
int *week, int *tow) {
int ww = 0;
int tt = 0;
int gpsDays = 0;
if ( mm < 3 ) { yy -= 1; mm += 12; }
gpsDays = (int)(365.25*yy) + (int)(30.6001*(mm+1.0)) + dd - 723263; // 1980-01-06
ww = gpsDays / 7;
tt = gpsDays % 7;
tt = tt*86400 + hr*3600 + min*60 + sec;
*week = ww;
*tow = tt;
return 0;
}
/* ------------------------------------------------------------------------------------ */
static ui32_t u4(ui8_t *bytes) { // 32bit unsigned int
ui32_t val = 0; // le: p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24)
memcpy(&val, bytes, 4);
return val;
}
static i32_t i4(ui8_t *bytes) { // 32bit signed int
i32_t val = 0; // le: p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24)
memcpy(&val, bytes, 4);
return val;
}
static ui32_t u3(ui8_t *bytes) { // 24bit unsigned int
int val24 = 0;
val24 = bytes[0] | (bytes[1]<<8) | (bytes[2]<<16);
// = memcpy(&val, bytes, 3), val &= 0x00FFFFFF;
return val24;
}
static int i3(ui8_t *bytes) { // 24bit signed int
int val = 0,
val24 = 0;
val = bytes[0] | (bytes[1]<<8) | (bytes[2]<<16);
val24 = val & 0xFFFFFF; if (val24 & 0x800000) val24 = val24 - 0x1000000;
return val24;
}
static ui16_t u2(ui8_t *bytes) { // 16bit unsigned int
return bytes[0] | (bytes[1]<<8);
}
static i16_t i2(ui8_t *bytes) { // 16bit signed int
//return (i16_t)u2(bytes);
int val = bytes[0] | (bytes[1]<<8);
if (val & 0x8000) val -= 0x10000;
return val;
}
// -----------------------------------------------------------------------------
// AA BF 35 .... crc AA AA
// "BF" header/subtype?
// "35" frame length?
#define OFS 0
#define pos_CNT1 (OFS+ 3) // 1 nibble (0x80..0x8F ?)
#define pos_TIME (OFS+ 4) // 3*1 byte
#define pos_GPSecefX (OFS+ 8) // 4 byte
#define pos_GPSecefY (OFS+12) // 4 byte
#define pos_GPSecefZ (OFS+16) // 4 byte
#define pos_GPSecefV (OFS+20) // 3*2 byte
#define pos_GPSnSats (OFS+26) // 1 byte (num Sats ?)
#define pos_CNT2 (OFS+43) // 1 byte (0x01..0x10 ?)
#define pos_CFG (OFS+44) // 2/4 byte
#define pos_CRC (OFS+48) // 2 byte
// -----------------------------------------------------------------------------
static int crc16rev(gpx_t *gpx, int start, int len) {
int crc16poly = 0xA001; // rev 0x8005
int rem = 0xFFFF, i, j;
int byte;
if (start+len+2 > FRAME_LEN) return -1;
for (i = 0; i < len; i++) {
byte = gpx->frame[start+i];
rem ^= byte;
for (j = 0; j < 8; j++) {
if (rem & 0x0001) {
rem = (rem >> 1) ^ crc16poly;
}
else {
rem = (rem >> 1);
}
rem &= 0xFFFF;
}
}
return rem;
}
static int check_CRC(gpx_t *gpx) {
ui32_t crclen = 45;
ui32_t crcdat = 0;
crcdat = u2(gpx->frame+pos_CRC);
if ( crcdat != crc16rev(gpx, pos_CNT1, crclen) ) {
return 1; // CRC NO
}
else return 0; // CRC OK
}
// -----------------------------------------------------------------------------
// WGS84/GRS80 Ellipsoid
#define EARTH_a 6378137.0
#define EARTH_b 6356752.31424518
#define EARTH_a2_b2 (EARTH_a*EARTH_a - EARTH_b*EARTH_b)
const
double a = EARTH_a,
b = EARTH_b,
a_b = EARTH_a2_b2,
e2 = EARTH_a2_b2 / (EARTH_a*EARTH_a),
ee2 = EARTH_a2_b2 / (EARTH_b*EARTH_b);
static void ecef2elli(double X[], double *lat, double *lon, double *alt) {
double phi, lam, R, p, t;
lam = atan2( X[1] , X[0] );
p = sqrt( X[0]*X[0] + X[1]*X[1] );
t = atan2( X[2]*a , p*b );
phi = atan2( X[2] + ee2 * b * sin(t)*sin(t)*sin(t) ,
p - e2 * a * cos(t)*cos(t)*cos(t) );
R = a / sqrt( 1 - e2*sin(phi)*sin(phi) );
*alt = p / cos(phi) - R;
*lat = phi*180/M_PI;
*lon = lam*180/M_PI;
}
static int get_GPSkoord(gpx_t *gpx) {
int i, k;
unsigned byte;
int XYZ; // 32bit
double X[3], lat, lon, alt;
ui8_t *gpsVel;
short vel16; // 16bit
double V[3];
double phi, lam, dir;
double vN; double vE; double vU;
for (k = 0; k < 3; k++)
{
memcpy(&XYZ, gpx->frame+(pos_GPSecefX+4*k), 4);
X[k] = XYZ / 100.0;
gpsVel = gpx->frame+(pos_GPSecefV+2*k);
vel16 = gpsVel[0] | gpsVel[1] << 8;
V[k] = vel16 / 100.0;
}
// ECEF-Position
ecef2elli(X, &lat, &lon, &alt);
gpx->lat = lat;
gpx->lon = lon;
gpx->alt = alt;
if ((alt < -1000.0) || (alt > 80000.0)) return -3; // plausibility-check: altitude, if ecef=(0,0,0)
// ECEF-Velocities
// ECEF-Vel -> NorthEastUp
phi = lat*M_PI/180.0;
lam = lon*M_PI/180.0;
vN = -V[0]*sin(phi)*cos(lam) - V[1]*sin(phi)*sin(lam) + V[2]*cos(phi);
vE = -V[0]*sin(lam) + V[1]*cos(lam);
vU = V[0]*cos(phi)*cos(lam) + V[1]*cos(phi)*sin(lam) + V[2]*sin(phi);
// NEU -> HorDirVer
gpx->vH = sqrt(vN*vN+vE*vE);
dir = atan2(vE, vN) * 180.0 / M_PI;
if (dir < 0) dir += 360.0;
gpx->vD = dir;
gpx->vV = vU;
// num Sats solution ? GLONASS + GPS ?
gpx->numSats = gpx->frame[pos_GPSnSats];
return 0;
}
static int reset_time(gpx_t *gpx) {
gpx->gps_cnt = 0;
gpx->yr = 0;
gpx->week = 0;
return 0;
}
static int get_time(gpx_t *gpx) {
gpx->hrs = gpx->frame[pos_TIME];
gpx->min = gpx->frame[pos_TIME+1];
gpx->sec = gpx->frame[pos_TIME+2];
if (gpx->crcOK)
{
int week = 0;
int tow = 0;
int sec_gps = 0;
gpx->gps_cnt_prev = gpx->gps_cnt;
gpx->sec_day_prev = gpx->sec_day;
gpx->sec_day = gpx->hrs*60*60 + gpx->min*60 + gpx->sec;
// JSON frame counter: seconds since GPS (ignoring leap seconds)
//
if (gpx->yr == 0) { // 1980-01-06
week = 0;
tow = gpx->sec_day; // yr=mth=day=0
}
else {
datetime2GPSweek(gpx->yr, gpx->mth, gpx->day, gpx->hrs, gpx->min, (int)(gpx->sec+0.5), &week, &tow);
}
sec_gps = week*604800 + tow; // SECONDS_IN_WEEK=7*86400=604800
gpx->week = week;
if (sec_gps > gpx->gps_cnt_prev) { // skip day roll-over until date update
gpx->gps_cnt = sec_gps;
}
}
return 0;
}
static int get_cfg(gpx_t *gpx) {
gpx->subcnt1 = (gpx->frame[pos_CNT1] & 0xF);
gpx->subcnt2 = gpx->frame[pos_CNT2] ; // ? subcnt2 == subcnt1 + 1 ?
if (gpx->crcOK)
{
ui32_t cfg32 = u4(gpx->frame+pos_CFG);
gpx->cfg[gpx->subcnt1] = cfg32;
switch (gpx->subcnt1) { // or use subcnt2 ?
case 0x0: //sub2=0x01:
memcpy(&gpx->calA, &cfg32, 4);
break;
case 0x1: //sub2=0x02:
memcpy(&gpx->calB, &cfg32, 4);
break;
case 0x2: //sub2=0x03:
memcpy(&gpx->calC, &cfg32, 4);
break;
case 0xC: //sub2=0x0D: SN GLONASS/GPS ?
if (cfg32 != gpx->snC && gpx->snC > 0) {
//reset_cfg
gpx->snD = 0;
reset_time(gpx);
}
gpx->snC = cfg32; // 16 or 32 bit ?
break;
case 0xD: //sub2=0x0E: SN sensor boom ?
if (cfg32 != gpx->snD && gpx->snD > 0) {
//reset_cfg
gpx->snC = 0;
reset_time(gpx);
}
gpx->snD = cfg32; // 16 or 32 bit ?
break;
case 0xE: //sub2=0x0F: calib date ?
break;
case 0xF: //sub2=0x10: date
gpx->yr = cfg32 % 100;
gpx->yr += 2000;
cfg32 /= 100;
gpx->mth = cfg32 % 100;
cfg32 /= 100;
gpx->day = cfg32 % 100;
break;
default:
break;
}
}
return 0;
}
// -----------------------------------------------------------------------------
static void print_gpx(gpx_t *gpx, int crcOK) {
int i, j;
//printf(" :%6.1f: ", sample_count/(double)sample_rate);
//
gpx->crcOK = crcOK;
get_cfg(gpx);
get_time(gpx);
get_GPSkoord(gpx);
if (gpx->sec_day != gpx->sec_day_prev || !option_uniq)
{
printf(" [%2d] ", gpx->subcnt1);
printf(" (%02d:%02d:%02d) ", gpx->hrs, gpx->min, gpx->sec);
printf(" lat: %.5f ", gpx->lat);
printf(" lon: %.5f ", gpx->lon);
printf(" alt: %.2f ", gpx->alt);
printf(" vH: %4.1f D: %5.1f vV: %3.1f ", gpx->vH, gpx->vD, gpx->vV);
if (option_verbose > 1) printf(" sats: %d ", gpx->numSats);
printf(" %s", gpx->crcOK ? "[OK]" : "[NO]");
if (gpx->crcOK)
{
if (option_verbose)
{
// subcnt2 == subcnt1 + 1 ?
switch (gpx->subcnt1) {
case 0x0: if (option_verbose > 1) printf(" <%d> A: %.5f", gpx->subcnt2, gpx->calA); break;
case 0x1: if (option_verbose > 1) printf(" <%d> B: %.2f", gpx->subcnt2, gpx->calB); break;
case 0x2: if (option_verbose > 1) printf(" <%d> C: %.3f", gpx->subcnt2, gpx->calC); break;
case 0xC: printf(" <%d> snC: %d", gpx->subcnt2, gpx->snC); break;
case 0xD: printf(" <%d> snD: %d", gpx->subcnt2, gpx->snD); break;
case 0xE: printf(" <%d> calDate: %06d", gpx->subcnt2, gpx->cfg[gpx->subcnt1]); break;
case 0xF: printf(" <%d> %04d-%02d-%02d", gpx->subcnt2, gpx->yr, gpx->mth, gpx->day); break;
default: if (option_verbose > 1) printf(" <%d>", gpx->subcnt2); break;
}
}
if (option_dbg)
{
printf(" : ");
printf(" [0x%X:0x%02X]", gpx->subcnt1, gpx->subcnt2);
printf(" 0x%08X =", gpx->cfg[gpx->subcnt1]);
if (gpx->subcnt1 > 0x8) printf(" %u ", gpx->cfg[gpx->subcnt1]); // 0x9,0xA not const
else {
float *f = (float*)(gpx->cfg+gpx->subcnt1);
printf(" %.4f ", *f);
}
}
}
printf("\n");
}
if (option_jsn && gpx->crcOK) {
// sonde SN change remains undetected until next SN update
if (gpx->week > 0 && gpx->gps_cnt > gpx->gps_cnt_prev && gpx->snC > 0 && gpx->snD > 0)
{
if (gpx->gps_cnt - gpx->gps_cnt_prev > TIMEOUT_JSN && gpx->gps_cnt_prev > gpx->sec_day_prev) {
// reset SN after TIMEOUT_JSN sec gap;
// if new signal replaces old one within timeout limit,
// new positions might still be transmitted with old SN
//reset_cfg
gpx->snC = 0;
gpx->snD = 0;
reset_time(gpx);
}
else {
char *ver_jsn = NULL;
printf("{ \"type\": \"%s\"", "MRZ");
printf(", \"frame\": %lu, ", (unsigned long)gpx->gps_cnt); // sec_gps0+0.5
printf("\"id\": \"MRZ-%d-%d\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%02dZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f, \"sats\": %d",
gpx->snC, gpx->snD, gpx->yr, gpx->mth, gpx->day, gpx->hrs, gpx->min, gpx->sec, gpx->lat, gpx->lon, gpx->alt, gpx->vH, gpx->vD, gpx->vV, gpx->numSats);
if (gpx->jsn_freq > 0) {
printf(", \"freq\": %d", gpx->jsn_freq);
}
#ifdef VER_JSN_STR
ver_jsn = VER_JSN_STR;
#endif
if (ver_jsn && *ver_jsn != '\0') printf(", \"version\": \"%s\"", ver_jsn);
printf(" }\n");
}
}
}
}
static void print_frame(gpx_t *gpx, int pos) {
int j;
int crcOK = 0;
static int frame_count = 0;
if (option_b < 2) {
if (pos > RAWBITFRAME_LEN) pos = RAWBITFRAME_LEN;
manchester(frame_rawbits, frame_bits, pos);
pos /= 2;
}
if (option_raw == 2) {
//printf(" :%6.1f: ", sample_count/(double)sample_rate);
//
for (j = 0; j < pos; j++) {
printf("%c", frame_bits[j]);
}
//if (frame_count % 3 == 2)
{
printf("\n");
}
}
else {
int frmlen = (pos-bits_ofs)/8;
bits2bytes(frame_bits+bits_ofs, gpx->frame, frmlen);
crcOK = (check_CRC(gpx) == 0);
if (option_raw == 1) {
//printf(" :%6.1f: ", sample_count/(double)sample_rate);
//
for (j = 0; j < frmlen; j++) {
printf("%02X ", gpx->frame[j]);
}
printf(" %s", crcOK ? "[OK]" : "[NO]");
printf("\n");
}
else {
//if (frame_count % 3 == 0)
{
if (pos/8 > pos_GPSecefV+6) print_gpx(gpx, crcOK);
}
}
}
frame_count++;
}
/* -------------------------------------------------------------------------- */
int main(int argc, char **argv) {
FILE *fp;
char *fpname;
int pos, i, j, bit, len;
int header_found = 0;
int cfreq = -1;
gpx_t gpx = {0};
#ifdef CYGWIN
_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
#endif
setbuf(stdout, NULL);
fpname = argv[0];
++argv;
while ((*argv) && (!wavloaded)) {
if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
fprintf(stderr, "%s [options] audio.wav\n", fpname);
fprintf(stderr, " options:\n");
fprintf(stderr, " -v, --verbose\n");
fprintf(stderr, " -r, --raw\n");
fprintf(stderr, " -i, --invert\n");
fprintf(stderr, " -b (alt. Demod.)\n");
return 0;
}
else if ( (strcmp(*argv, "--ofs") == 0) ) {
++argv;
if (*argv) {
bits_ofs = atoi(*argv);
}
else return -1;
}
else if ( (strcmp(*argv, "--dbg" ) == 0) ) { option_dbg = 1; }
else if ( (strcmp(*argv, "-v") == 0) || (strcmp(*argv, "--verbose") == 0) ) {
option_verbose = 1;
}
else if ( (strcmp(*argv, "-vv" ) == 0) ) option_verbose = 2;
else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) {
option_raw = 1;
}
else if ( (strcmp(*argv, "-R") == 0) || (strcmp(*argv, "--RAW") == 0) ) {
option_raw = 2;
}
else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
option_inv = 0x1;
}
else if ( (strcmp(*argv, "--auto") == 0) ) {
option_auto = 1;
}
else if ( (strcmp(*argv, "--uniq") == 0) ) {
option_uniq = 1;
}
else if (strcmp(*argv, "-b" ) == 0) { option_b = 1; }
else if (strcmp(*argv, "-b2") == 0) { option_b = 2; }
else if (strcmp(*argv, "--ecc" ) == 0) { option_ecc = 1; }
else if (strcmp(*argv, "--ptu") == 0) {
option_ptu = 1;
}
else if (strcmp(*argv, "--ch2") == 0) { wav_channel = 1; } // right channel (default: 0=left)
else if (strcmp(*argv, "--json") == 0) {
option_jsn = 1;
}
else if ( (strcmp(*argv, "--jsn_cfq") == 0) ) {
int frq = -1; // center frequency / Hz
++argv;
if (*argv) frq = atoi(*argv); else return -1;
if (frq < 300000000) frq = -1;
cfreq = frq;
}
else {
fp = fopen(*argv, "rb");
if (fp == NULL) {
fprintf(stderr, "error open %s\n", *argv);
return -1;
}
wavloaded = 1;
}
++argv;
}
if (!wavloaded) fp = stdin;
gpx.jsn_freq = 0;
if (cfreq > 0) gpx.jsn_freq = (cfreq+500)/1000;
i = read_wav_header(fp);
if (i) {
fclose(fp);
return -1;
}
memcpy(frame_rawbits, header, HEADLEN);
pos = FRAMESTART;
while (!read_bits_fsk(fp, &bit, &len)) {
if (len == 0) { // reset_frame();
if (pos > RAWBITFRAME_LEN-10) {
print_frame(&gpx, pos);
//header_found = 0;
//pos = FRAMESTART;
}
header_found = 0;
pos = FRAMESTART;
inc_bufpos();
buf[bufpos] = 'x';
continue; // ...
}
for (i = 0; i < len; i++) {
inc_bufpos();
buf[bufpos] = 0x30 + bit; // Ascii
if (!header_found) {
header_found = compare2();
if (header_found < 0) option_inv ^= 0x1;
}
else {
frame_rawbits[pos] = 0x30 + bit; // Ascii
pos++;
if (pos == RAWBITFRAME_LEN) {
frame_rawbits[pos] = '\0';
print_frame(&gpx, pos);//FRAME_LEN
header_found = 0;
pos = FRAMESTART;
}
}
}
if (header_found && option_b==1) {
bitstart = 1;
while ( pos < RAWBITFRAME_LEN ) {
if (read_rawbit(fp, &bit) == EOF) break;
frame_rawbits[pos] = 0x30 + bit;
pos++;
}
frame_rawbits[pos] = '\0';
print_frame(&gpx, pos);//FRAME_LEN
header_found = 0;
pos = FRAMESTART;
}
if (header_found && option_b>=2) {
bitstart = 1;
if (pos%2) {
if (read_rawbit(fp, &bit) == EOF) break;
frame_rawbits[pos] = 0x30 + bit;
pos++;
}
manchester(frame_rawbits, frame_bits, pos);
pos /= 2;
while ( pos < BITFRAME_LEN ) {
if (read_rawbit2(fp, &bit) == EOF) break;
frame_bits[pos] = 0x30 + bit;
pos++;
}
frame_bits[pos] = '\0';
print_frame(&gpx, pos);//FRAME_LEN
header_found = 0;
pos = FRAMESTART;
}
}
fclose(fp);
return 0;
}
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