diff --git a/demod/mod/mXXmod.c b/demod/mod/mXXmod.c new file mode 100644 index 0000000..d4a328f --- /dev/null +++ b/demod/mod/mXXmod.c @@ -0,0 +1,904 @@ + +/* + * mXX m18/m20 (test) + * + * (cf. mXX_20180919.c) + * sync header: correlation/matched filter + * files: mXXmod.c demod_mod.h demod_mod.c + * compile: + * gcc -c demod_mod.c + * gcc mXXmod.c demod_mod.o -lm -o mXXmod + * + * 2018-09-19 Ury: (len=0x43) ./mXX -c -vv --br 9600 mXX_20180919.wav + * 2019-11-06 Ury: (len=0x45) ./mXX -c -vv --br 9600 mXX_20191106.wav + * 2020-02-14 Ury: (len=0x45) ./mXX -c -vv --br 9600 mXX_20200214.wav + * 2020-05-11 Wien: (len=0x45) ./mXX -c -vv --br 9603 mXX_20200511.wav + * + * author: zilog80 + */ + +#include +#include +#include +#include + +#ifdef CYGWIN + #include // cygwin: _setmode() + #include +#endif + + +#include "demod_mod.h" + + +typedef struct { + i8_t vbs; // verbose output + i8_t raw; // raw frames + i8_t crc; // CRC check output + i8_t ecc; // Reed-Solomon ECC + i8_t sat; // GPS sat data + i8_t ptu; // PTU: temperature + i8_t inv; + i8_t aut; + i8_t col; // colors + i8_t jsn; // JSON output (auto_rx) +} option_t; + + +// ? 9600 baud M20 <-> 9616 baud M10 ? +#define BAUD_RATE 9600 // 9600..9604 // 9614..9616 + +/* -------------------------------------------------------------------------- */ + +/* +Header = Sync-Header + Sonde-Header: +1100110011001100 1010011001001100 1101010011010011 0100110101010101 0011010011001100 +uudduudduudduudd ududduuddudduudd uudududduududduu dudduudududududu dduududduudduudd (oder:) +dduudduudduudduu duduudduuduudduu ddududuudduduudd uduuddududududud uudduduudduudduu (komplement) + 0 0 0 0 0 0 0 0 1 1 - - - 0 0 0 0 1 1 0 0 1 0 0 1 0 0 1 1 1 1 1 0 0 1 0 0 0 0 0 +*/ + +#define BITS 8 +#define HEADLEN 32 // HEADLEN+HEADOFS=32 <= strlen(header) +#define HEADOFS 0 + // Sync-Header (raw) // Sonde-Header (bits) +//char head[] = "11001100110011001010011001001100"; //"0110010010011111"; // M10: 64 9F , M2K2: 64 8F + //"0111011010011111"; // M10: 76 9F , w/ aux-data + //"0110010001001001"; // M10-dop: 64 49 09 + //"0110010010101111"; // M10+: 64 AF w/ gtop-GPS +static char rawheader[] = "10011001100110010100110010011001"; + +#define FRAME_LEN (100+1) // 0x64+1 +#define BITFRAME_LEN (FRAME_LEN*BITS) + +#define AUX_LEN 20 +#define BITAUX_LEN (AUX_LEN*BITS) + + +typedef struct { + int week; int tow_ms; int gpssec; + int jahr; int monat; int tag; + int wday; + int std; int min; float sek; + double lat; double lon; double alt; + double vH; double vD; double vV; + double vx; double vy; double vD2; + ui8_t numSV; + ui8_t utc_ofs; + char SN[12]; + ui8_t frame_bytes[FRAME_LEN+AUX_LEN+4]; + char frame_bits[BITFRAME_LEN+BITAUX_LEN+8]; + int auxlen; // 0 .. 0x76-0x64 + option_t option; +} gpx_t; + + +/* -------------------------------------------------------------------------- */ +#define SECONDS_IN_WEEK (604800.0) // 7*86400 +/* + * Convert GPS Week and Seconds to Modified Julian Day. + * - Adapted from sci.astro FAQ. + * - Ignores UTC leap seconds. + */ +static void Gps2Date(long GpsWeek, long GpsSeconds, int *Year, int *Month, int *Day) { + + long GpsDays, Mjd; + long J, C, Y, M; + + GpsDays = GpsWeek * 7 + (GpsSeconds / 86400); + Mjd = 44244 + GpsDays; + + J = Mjd + 2468570; + C = 4 * J / 146097; + J = J - (146097 * C + 3) / 4; + Y = 4000 * (J + 1) / 1461001; + J = J - 1461 * Y / 4 + 31; + M = 80 * J / 2447; + *Day = J - 2447 * M / 80; + J = M / 11; + *Month = M + 2 - (12 * J); + *Year = 100 * (C - 49) + Y + J; +} +/* -------------------------------------------------------------------------- */ + +static int bits2bytes(char *bitstr, ui8_t *bytes) { + int i, bit, d, byteval; + int bitpos, bytepos; + + bitpos = 0; + bytepos = 0; + + while (bytepos < FRAME_LEN+AUX_LEN) { + + byteval = 0; + d = 1; + for (i = 0; i < BITS; i++) { + //bit=*(bitstr+bitpos+i); /* little endian */ + bit=*(bitstr+bitpos+7-i); /* big endian */ + // bit == 'x' ? + if (bit == '1') byteval += d; + else /*if ((bit == '0') || (bit == 'x'))*/ byteval += 0; + d <<= 1; + } + bitpos += BITS; + bytes[bytepos++] = byteval & 0xFF; + + } + + //while (bytepos < FRAME_LEN+AUX_LEN) bytes[bytepos++] = 0; + + return 0; +} + +/* -------------------------------------------------------------------------- */ + + +#define stdFLEN 0x64 // pos[0]=0x64 // M20: 0x45 +#define pos_GPSTOW 0x0F // 4 byte +#define pos_GPSlat 0x1C // 4 byte +#define pos_GPSlon 0x20 // 4 byte +#define pos_GPSalt 0x08 // 3 byte +//#define pos_GPSsats 0x1E // 1 byte +//#define pos_GPSutc 0x1F // 1 byte +#define pos_GPSweek 0x1A // 2 byte +//Velocity East-North-Up (ENU) +#define pos_GPSvE 0x0B // 2 byte +#define pos_GPSvN 0x0D // 2 byte +#define pos_GPSvU 0x18 // 2 byte +#define pos_Check (stdFLEN-1) // 2 byte + + +#define ANSI_COLOR_RED "\x1b[31m" +#define ANSI_COLOR_GREEN "\x1b[32m" +#define ANSI_COLOR_YELLOW "\x1b[33m" +#define ANSI_COLOR_BLUE "\x1b[34m" +#define ANSI_COLOR_MAGENTA "\x1b[35m" +#define ANSI_COLOR_CYAN "\x1b[36m" +#define ANSI_COLOR_RESET "\x1b[0m" + +#define XTERM_COLOR_BROWN "\x1b[38;5;94m" // 38;5;{0..255}m + +#define col_GPSweek "\x1b[38;5;20m" // 2 byte +#define col_GPSTOW "\x1b[38;5;27m" // 4 byte +#define col_GPSdate "\x1b[38;5;94m" //111 +#define col_GPSlat "\x1b[38;5;34m" // 4 byte +#define col_GPSlon "\x1b[38;5;70m" // 4 byte +#define col_GPSalt "\x1b[38;5;82m" // 4 byte +#define col_GPSvel "\x1b[38;5;36m" // 6 byte +#define col_SN "\x1b[38;5;58m" // 3 byte +#define col_Check "\x1b[38;5;11m" // 2 byte +#define col_TXT "\x1b[38;5;244m" +#define col_FRTXT "\x1b[38;5;244m" +#define col_CSok "\x1b[38;5;2m" +#define col_CSno "\x1b[38;5;1m" +#define col_CNST "\x1b[38;5;58m" // 3 byte + +/* +$ for code in {0..255} +> do echo -e "\e[38;5;${code}m"'\\e[38;5;'"$code"m"\e[0m" +> done +*/ + +static int get_GPSweek(gpx_t *gpx) { + int i; + unsigned byte; + ui8_t gpsweek_bytes[2]; + int gpsweek; + + //gpx->numSV = gpx->frame_bytes[pos_GPSsats]; + //gpx->utc_ofs = gpx->frame_bytes[pos_GPSutc]; + + for (i = 0; i < 2; i++) { + byte = gpx->frame_bytes[pos_GPSweek + i]; + gpsweek_bytes[i] = byte; + } + + gpsweek = (gpsweek_bytes[0] << 8) + gpsweek_bytes[1]; + + if (gpsweek > 4000) return -1; + + // Trimble Copernicus II WNRO (AirPrime XM1110 OK) + if (gpsweek < 1304 /*2005-01-02*/ ) gpsweek += 1024; + + gpx->week = gpsweek; + + return 0; +} + +//char weekday[7][3] = { "So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"}; +static char weekday[7][4] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; + +static int get_GPStime(gpx_t *gpx) { + int i; + unsigned byte; + ui8_t gpstime_bytes[4]; + int gpstime, day; + int ms; + + for (i = 0; i < 3; i++) { + byte = gpx->frame_bytes[pos_GPSTOW + i]; + gpstime_bytes[i] = byte; + } + + gpstime = 0; + for (i = 0; i < 3; i++) { + gpstime |= gpstime_bytes[i] << (8*(2-i)); + } + + gpx->tow_ms = gpstime*1000; + ms = 0;//gpstime % 1000; + //gpstime /= 1000; + gpx->gpssec = gpstime; + + day = gpstime / (24 * 3600); + if ((day < 0) || (day > 6)) return -1; + + gpstime %= (24*3600); + + gpx->wday = day; + gpx->std = gpstime/3600; + gpx->min = (gpstime%3600)/60; + gpx->sek = gpstime%60 + ms/1000.0; + + return 0; +} + +//static double B60B60 = (1<<30)/90.0; // 2^32/360 = 2^30/90 = 0xB60B60.711x // M10 +static double B60B60 = 1e6; // M20 + +static int get_GPSlat(gpx_t *gpx) { + int i; + unsigned byte; + ui8_t gpslat_bytes[4]; + int gpslat; + double lat; + + for (i = 0; i < 4; i++) { + byte = gpx->frame_bytes[pos_GPSlat + i]; + gpslat_bytes[i] = byte; + } + + gpslat = 0; + for (i = 0; i < 4; i++) { + gpslat |= gpslat_bytes[i] << (8*(3-i)); + } + lat = gpslat / B60B60; + gpx->lat = lat; + + return 0; +} + +static int get_GPSlon(gpx_t *gpx) { + int i; + unsigned byte; + ui8_t gpslon_bytes[4]; + int gpslon; + double lon; + + for (i = 0; i < 4; i++) { + byte = gpx->frame_bytes[pos_GPSlon + i]; + gpslon_bytes[i] = byte; + } + + gpslon = 0; + for (i = 0; i < 4; i++) { + gpslon |= gpslon_bytes[i] << (8*(3-i)); + } + lon = gpslon / B60B60; + gpx->lon = lon; + + return 0; +} + +static int get_GPSalt(gpx_t *gpx) { // 24 bit + int i; + unsigned byte; + ui8_t gpsalt_bytes[4]; + int gpsalt; + double alt; + + for (i = 0; i < 3; i++) { + byte = gpx->frame_bytes[pos_GPSalt + i]; + gpsalt_bytes[i] = byte; + } + + gpsalt = 0; + for (i = 0; i < 3; i++) { + gpsalt |= gpsalt_bytes[i] << (8*(2-i)); + } + alt = gpsalt / 100.0; + gpx->alt = alt; + + return 0; +} + +static int get_GPSvel(gpx_t *gpx) { + int i; + unsigned byte; + ui8_t gpsVel_bytes[2]; + short vel16; + double vx, vy, dir, alpha; + const double ms2kn100 = 1e2; //2e2; // m/s -> knots: 1 m/s = 3.6/1.852 kn = 1.94 kn + + for (i = 0; i < 2; i++) { + byte = gpx->frame_bytes[pos_GPSvE + i]; + gpsVel_bytes[i] = byte; + } + vel16 = gpsVel_bytes[0] << 8 | gpsVel_bytes[1]; + vx = vel16 / ms2kn100; // ost + + for (i = 0; i < 2; i++) { + byte = gpx->frame_bytes[pos_GPSvN + i]; + gpsVel_bytes[i] = byte; + } + vel16 = gpsVel_bytes[0] << 8 | gpsVel_bytes[1]; + vy= vel16 / ms2kn100; // nord + + gpx->vx = vx; + gpx->vy = vy; + gpx->vH = sqrt(vx*vx+vy*vy); +///* + alpha = atan2(vy, vx)*180/M_PI; // ComplexPlane (von x-Achse nach links) - GeoMeteo (von y-Achse nach rechts) + dir = 90-alpha; // z=x+iy= -> i*conj(z)=y+ix=re(i(pi/2-t)), Achsen und Drehsinn vertauscht + if (dir < 0) dir += 360; // atan2(y,x)=atan(y/x)=pi/2-atan(x/y) , atan(1/t) = pi/2 - atan(t) + gpx->vD2 = dir; +//*/ + dir = atan2(vx, vy) * 180 / M_PI; + if (dir < 0) dir += 360; + gpx->vD = dir; + + for (i = 0; i < 2; i++) { + byte = gpx->frame_bytes[pos_GPSvU + i]; + gpsVel_bytes[i] = byte; + } + vel16 = gpsVel_bytes[0] << 8 | gpsVel_bytes[1]; + gpx->vV = vel16 / ms2kn100; + + return 0; +} + + +/* -------------------------------------------------------------------------- */ +/* +g : F^n -> F^16 // checksum, linear +g(m||b) = f(g(m),b) + +// update checksum +f : F^16 x F^8 -> F^16 linear + +010100001000000101000000 +001010000100000010100000 +000101000010000001010000 +000010100001000000101000 +000001010000100000010100 +100000100000010000001010 +000000011010100000000100 +100000000101010000000010 +000000001000000000000000 +000000000100000000000000 +000000000010000000000000 +000000000001000000000000 +000000000000100000000000 +000000000000010000000000 +000000000000001000000000 +000000000000000100000000 +*/ + +static int update_checkM10(int c, ui8_t b) { + int c0, c1, t, t6, t7, s; + + c1 = c & 0xFF; + + // B + b = (b >> 1) | ((b & 1) << 7); + b ^= (b >> 2) & 0xFF; + + // A1 + t6 = ( c & 1) ^ ((c>>2) & 1) ^ ((c>>4) & 1); + t7 = ((c>>1) & 1) ^ ((c>>3) & 1) ^ ((c>>5) & 1); + t = (c & 0x3F) | (t6 << 6) | (t7 << 7); + + // A2 + s = (c >> 7) & 0xFF; + s ^= (s >> 2) & 0xFF; + + + c0 = b ^ t ^ s; + + return ((c1<<8) | c0) & 0xFFFF; +} + +static int checkM10(ui8_t *msg, int len) { + int i, cs; + + cs = 0; + for (i = 0; i < len; i++) { + cs = update_checkM10(cs, msg[i]); + } + + return cs & 0xFFFF; +} + +/* -------------------------------------------------------------------------- */ + +static float get_Tntc0(gpx_t *gpx) { +// SMD ntc + float Rs = 22.1e3; // P5.6=Vcc + float R25 = 2.2e3;// 0.119e3; //2.2e3; + float b = 3650.0; // B/Kelvin + float T25 = 25.0 + 273.15; // T0=25C, R0=R25=5k +// -> Steinhart–Hart coefficients (polyfit): + float p0 = 4.42606809e-03, + p1 = -6.58184309e-04, + p2 = 8.95735557e-05, + p3 = -2.84347503e-06; + float T = 0.0; // T/Kelvin + ui16_t ADC_ntc0; // M10: ADC12 P6.4(A4) + float x, R; + + ADC_ntc0 = (gpx->frame_bytes[0x07] << 8) | gpx->frame_bytes[0x06]; // M10: 0x40,0x3F + x = (4095.0 - ADC_ntc0)/ADC_ntc0; // (Vcc-Vout)/Vout + R = Rs / x; + if (R > 0) T = 1/(1/T25 + 1/b * log(R/R25)); + //if (R > 0) T = 1/( p0 + p1*log(R) + p2*log(R)*log(R) + p3*log(R)*log(R)*log(R) ); + + return T - 273.15; +} + +/* -------------------------------------------------------------------------- */ + +static int print_pos(gpx_t *gpx, int csOK) { + int err, err2; + + err = 0; + err |= get_GPSweek(gpx); + err |= get_GPStime(gpx); + err |= get_GPSlat(gpx); + err |= get_GPSlon(gpx); + err |= get_GPSalt(gpx); + err2 = get_GPSvel(gpx); + + if (!err) { + + Gps2Date(gpx->week, gpx->gpssec, &gpx->jahr, &gpx->monat, &gpx->tag); + + if (gpx->option.col) { + fprintf(stdout, col_TXT); + if (gpx->option.vbs >= 3) fprintf(stdout, " (W "col_GPSweek"%d"col_TXT") ", gpx->week); + fprintf(stdout, col_GPSTOW"%s"col_TXT" ", weekday[gpx->wday]); + fprintf(stdout, col_GPSdate"%04d-%02d-%02d"col_TXT" "col_GPSTOW"%02d:%02d:%06.3f"col_TXT" ", + gpx->jahr, gpx->monat, gpx->tag, gpx->std, gpx->min, gpx->sek); + fprintf(stdout, " lat: "col_GPSlat"%.5f"col_TXT" ", gpx->lat); + fprintf(stdout, " lon: "col_GPSlon"%.5f"col_TXT" ", gpx->lon); + fprintf(stdout, " alt: "col_GPSalt"%.2f"col_TXT" ", gpx->alt); + if (!err2) { + fprintf(stdout, " vH: "col_GPSvel"%.1f"col_TXT" D: "col_GPSvel"%.1f"col_TXT" vV: "col_GPSvel"%.1f"col_TXT" ", gpx->vH, gpx->vD, gpx->vV); + } + if (gpx->option.vbs >= 2) { + fprintf(stdout, " # "); + if (csOK) fprintf(stdout, " "col_CSok"[OK]"col_TXT); + else fprintf(stdout, " "col_CSno"[NO]"col_TXT); + } + if (gpx->option.ptu && csOK) { + if (gpx->option.vbs >= 3) { + float t0 = get_Tntc0(gpx); + if (t0 > -270.0) fprintf(stdout, " (T0:%.1fC) ", t0); + } + } + fprintf(stdout, ANSI_COLOR_RESET""); + } + else { + if (gpx->option.vbs >= 3) fprintf(stdout, " (W %d) ", gpx->week); + fprintf(stdout, "%s ", weekday[gpx->wday]); + fprintf(stdout, "%04d-%02d-%02d %02d:%02d:%06.3f ", + gpx->jahr, gpx->monat, gpx->tag, gpx->std, gpx->min, gpx->sek); + fprintf(stdout, " lat: %.5f ", gpx->lat); + fprintf(stdout, " lon: %.5f ", gpx->lon); + fprintf(stdout, " alt: %.2f ", gpx->alt); + if (!err2) { + fprintf(stdout, " vH: %.1f D: %.1f vV: %.1f ", gpx->vH, gpx->vD, gpx->vV); + } + if (gpx->option.vbs >= 2) { + fprintf(stdout, " # "); + if (csOK) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); + } + if (gpx->option.ptu && csOK) { + if (gpx->option.vbs >= 3) { + float t0 = get_Tntc0(gpx); + if (t0 > -270.0) fprintf(stdout, " (T0:%.1fC) ", t0); + } + } + } + fprintf(stdout, "\n"); + + + } + + return err; +} + +static int print_frame(gpx_t *gpx, int pos) { + int i; + ui8_t byte; + int cs1, cs2; + int flen = stdFLEN; // stdFLEN=0x64, auxFLEN=0x76; M20:0x45 ? + + bits2bytes(gpx->frame_bits, gpx->frame_bytes); + flen = gpx->frame_bytes[0]; + if (flen == stdFLEN) gpx->auxlen = 0; + else { + gpx->auxlen = flen - stdFLEN; + //if (gpx->auxlen < 0 || gpx->auxlen > AUX_LEN) gpx->auxlen = 0; + } + + cs1 = (gpx->frame_bytes[pos_Check+gpx->auxlen] << 8) | gpx->frame_bytes[pos_Check+gpx->auxlen+1]; + cs2 = checkM10(gpx->frame_bytes, pos_Check+gpx->auxlen); + + if (gpx->option.raw) { + + if (gpx->option.col && gpx->frame_bytes[1] != 0x49) { + fprintf(stdout, col_FRTXT); + for (i = 0; i < FRAME_LEN+gpx->auxlen; i++) { + byte = gpx->frame_bytes[i]; + if ((i >= pos_GPSTOW) && (i < pos_GPSTOW+3)) fprintf(stdout, col_GPSTOW); + if ((i >= pos_GPSlat) && (i < pos_GPSlat+4)) fprintf(stdout, col_GPSlat); + if ((i >= pos_GPSlon) && (i < pos_GPSlon+4)) fprintf(stdout, col_GPSlon); + if ((i >= pos_GPSalt) && (i < pos_GPSalt+4)) fprintf(stdout, col_GPSalt); + if ((i >= pos_GPSweek) && (i < pos_GPSweek+2)) fprintf(stdout, col_GPSweek); + if ((i >= pos_GPSvE) && (i < pos_GPSvE+2)) fprintf(stdout, col_GPSvel); + if ((i >= pos_GPSvN) && (i < pos_GPSvN+2)) fprintf(stdout, col_GPSvel); + if ((i >= pos_GPSvU) && (i < pos_GPSvU+2)) fprintf(stdout, col_GPSvel); + if ((i >= pos_Check+gpx->auxlen) && (i < pos_Check+gpx->auxlen+2)) fprintf(stdout, col_Check); + fprintf(stdout, "%02x", byte); + fprintf(stdout, col_FRTXT); + } + if (gpx->option.vbs) { + fprintf(stdout, " # "col_Check"%04x"col_FRTXT, cs2); + if (cs1 == cs2) fprintf(stdout, " "col_CSok"[OK]"col_TXT); + else fprintf(stdout, " "col_CSno"[NO]"col_TXT); + } + fprintf(stdout, ANSI_COLOR_RESET"\n"); + } + else { + for (i = 0; i < FRAME_LEN+gpx->auxlen; i++) { + byte = gpx->frame_bytes[i]; + fprintf(stdout, "%02x", byte); + } + if (gpx->option.vbs) { + fprintf(stdout, " # %04x", cs2); + if (cs1 == cs2) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); + } + fprintf(stdout, "\n"); + } + + } + else if (gpx->frame_bytes[1] == 0x49) { + if (gpx->option.vbs == 3) { + for (i = 0; i < FRAME_LEN+gpx->auxlen; i++) { + byte = gpx->frame_bytes[i]; + fprintf(stdout, "%02x", byte); + } + fprintf(stdout, "\n"); + } + } + else print_pos(gpx, cs1 == cs2); + + return (gpx->frame_bytes[0]<<8)|gpx->frame_bytes[1]; +} + + +int main(int argc, char **argv) { + + int option_verbose = 0; // ausfuehrliche Anzeige + int option_raw = 0; // rohe Frames + int option_inv = 0; // invertiert Signal + //int option_res = 0; // genauere Bitmessung + int option_color = 0; + int option_ptu = 0; + int option_min = 0; + int option_iq = 0; + int option_lp = 0; + int option_dc = 0; + int option_pcmraw = 0; + int wavloaded = 0; + int sel_wavch = 0; // audio channel: left + int spike = 0; + + float baudrate = -1; + + FILE *fp = NULL; + char *fpname = NULL; + + int k; + + int bit, bit0; + int bitpos = 0; + int bitQ; + int pos; + + //int headerlen = 0; + + int header_found = 0; + + float thres = 0.76; + float _mv = 0.0; + + int symlen = 2; + int bitofs = 0; // 0 .. +2 + int shift = 0; + + pcm_t pcm = {0}; + dsp_t dsp = {0}; //memset(&dsp, 0, sizeof(dsp)); + + 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, " -c, --color\n"); + return 0; + } + 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, "-vvv") == 0) ) option_verbose = 3; + else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) { + option_raw = 1; + } + else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) { + option_inv = 1; // nicht noetig + } + else if ( (strcmp(*argv, "-c") == 0) || (strcmp(*argv, "--color") == 0) ) { + option_color = 1; + } + else if ( (strcmp(*argv, "--br") == 0) ) { + ++argv; + if (*argv) { + baudrate = atof(*argv); + if (baudrate < 9000 || baudrate > 10000) baudrate = BAUD_RATE; // default: 9615 + } + else return -1; + } + //else if (strcmp(*argv, "--res") == 0) { option_res = 1; } + else if ( (strcmp(*argv, "--ptu") == 0) ) { + option_ptu = 1; + } + else if ( (strcmp(*argv, "--spike") == 0) ) { + spike = 1; + } + else if ( (strcmp(*argv, "--ch2") == 0) ) { sel_wavch = 1; } // right channel (default: 0=left) + else if ( (strcmp(*argv, "--ths") == 0) ) { + ++argv; + if (*argv) { + thres = atof(*argv); + } + else return -1; + } + else if ( (strcmp(*argv, "-d") == 0) ) { + ++argv; + if (*argv) { + shift = atoi(*argv); + if (shift > 4) shift = 4; + if (shift < -4) shift = -4; + } + else return -1; + } + else if (strcmp(*argv, "--iq0") == 0) { option_iq = 1; } // differential/FM-demod + else if (strcmp(*argv, "--iq2") == 0) { option_iq = 2; } + else if (strcmp(*argv, "--iq3") == 0) { option_iq = 3; } // iq2==iq3 + else if (strcmp(*argv, "--IQ") == 0) { // fq baseband -> IF (rotate from and decimate) + double fq = 0.0; // --IQ , -0.5 < fq < 0.5 + ++argv; + if (*argv) fq = atof(*argv); + else return -1; + if (fq < -0.5) fq = -0.5; + if (fq > 0.5) fq = 0.5; + dsp.xlt_fq = -fq; // S(t) -> S(t)*exp(-f*2pi*I*t) + option_iq = 5; + } + else if (strcmp(*argv, "--lp") == 0) { option_lp = 1; } // IQ lowpass + else if (strcmp(*argv, "--dc") == 0) { option_dc = 1; } + else if (strcmp(*argv, "--min") == 0) { + option_min = 1; + } + else if (strcmp(*argv, "--json") == 0) { gpx.option.jsn = 1; } + else if (strcmp(*argv, "-") == 0) { + int sample_rate = 0, bits_sample = 0, channels = 0; + ++argv; + if (*argv) sample_rate = atoi(*argv); else return -1; + ++argv; + if (*argv) bits_sample = atoi(*argv); else return -1; + channels = 2; + if (sample_rate < 1 || (bits_sample != 8 && bits_sample != 16 && bits_sample != 32)) { + fprintf(stderr, "- \n"); + return -1; + } + pcm.sr = sample_rate; + pcm.bps = bits_sample; + pcm.nch = channels; + option_pcmraw = 1; + } + 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.option.inv = option_inv; // irrelevant + gpx.option.vbs = option_verbose; + gpx.option.raw = option_raw; + gpx.option.ptu = option_ptu; + gpx.option.col = option_color; + + + // init gpx + + if (option_iq == 0 && option_pcmraw) { + fclose(fp); + fprintf(stderr, "error: raw data not IQ\n"); + return -1; + } + if (option_iq) sel_wavch = 0; + + pcm.sel_ch = sel_wavch; + if (option_pcmraw == 0) { + k = read_wav_header(&pcm, fp); + if ( k < 0 ) { + fclose(fp); + fprintf(stderr, "error: wav header\n"); + return -1; + } + } + + // m10: BT>1?, h=1.2 ? + symlen = 2; + + // init dsp + // + dsp.fp = fp; + dsp.sr = pcm.sr; + dsp.bps = pcm.bps; + dsp.nch = pcm.nch; + dsp.ch = pcm.sel_ch; + dsp.br = (float)BAUD_RATE; + dsp.sps = (float)dsp.sr/dsp.br; + dsp.symlen = symlen; + dsp.symhd = 1; // M10!header + dsp._spb = dsp.sps*symlen; + dsp.hdr = rawheader; + dsp.hdrlen = strlen(rawheader); + dsp.BT = 1.8; // bw/time (ISI) // 1.0..2.0 // M20 ? + dsp.h = 0.9; // 1.2 modulation index // M20 ? + dsp.opt_iq = option_iq; + dsp.opt_lp = option_lp; + dsp.lpIQ_bw = 24e3; // IF lowpass bandwidth + dsp.lpFM_bw = 10e3; // FM audio lowpass + dsp.opt_dc = option_dc; + dsp.opt_IFmin = option_min; + + if ( dsp.sps < 8 ) { + fprintf(stderr, "note: sample rate low (%.1f sps)\n", dsp.sps); + } + + if (baudrate > 0) { + dsp.br = (float)baudrate; + dsp.sps = (float)dsp.sr/dsp.br; + fprintf(stderr, "sps corr: %.4f\n", dsp.sps); + } + + //headerlen = dsp.hdrlen; + + k = init_buffers(&dsp); + if ( k < 0 ) { + fprintf(stderr, "error: init buffers\n"); + return -1; + }; + + + bitofs += shift; + + while ( 1 ) + { + // FM-audio: + header_found = find_header(&dsp, thres, 2, bitofs, dsp.opt_dc); // optional 2nd pass: dc=0 + _mv = dsp.mv; + + if (header_found == EOF) break; + + // mv == correlation score + if (_mv*(0.5-gpx.option.inv) < 0) { + gpx.option.inv ^= 0x1; // M10: irrelevant + } + + if (header_found) { + + bitpos = 0; + pos = 0; + pos /= 2; + bit0 = '0'; // oder: _mv[j] > 0 + + while ( pos < BITFRAME_LEN+BITAUX_LEN ) { + + if (option_iq >= 2) { + float bl = -1; + if (option_iq > 2) bl = 4.0; + bitQ = read_slbit(&dsp, &bit, 0/*gpx.option.inv*/, bitofs, bitpos, bl, 0); + } + else { + bitQ = read_slbit(&dsp, &bit, 0/*gpx.option.inv*/, bitofs, bitpos, -1, spike); // symlen=2 + } + + if ( bitQ == EOF ) { break; } + + gpx.frame_bits[pos] = 0x31 ^ (bit0 ^ bit); + pos++; + bit0 = bit; + bitpos += 1; + } + gpx.frame_bits[pos] = '\0'; + print_frame(&gpx, pos); + if (pos < BITFRAME_LEN) break; + + header_found = 0; + + // bis Ende der Sekunde vorspulen; allerdings Doppel-Frame alle 10 sek + if (gpx.option.vbs < 3) { // && (regulare frame) // print_frame-return? + while ( bitpos < 5*BITFRAME_LEN ) { + bitQ = read_slbit(&dsp, &bit, 0/*gpx.option.inv*/, bitofs, bitpos, -1, spike); // symlen=2 + if ( bitQ == EOF) break; + bitpos++; + } + } + + pos = 0; + } + } + + + free_buffers(&dsp); + + fclose(fp); + + return 0; +} +