/* big endian forest * * gcc m1x12_20170424.c -lm * 2017-04-24 Ury * M10 w/ G.top GPS */ #include #include #include #include #ifdef CYGWIN #include // cygwin: _setmode() #include #endif typedef unsigned char ui8_t; typedef unsigned short ui16_t; typedef struct { int lat; int lon; int alt; int vE; int vN; int vU; double vH; double vD; double vV; int date; int time; char SN[12]; } datum_t; datum_t datum; int option_verbose = 0, // ausfuehrliche Anzeige option_raw = 0, // rohe Frames option_inv = 0, // invertiert Signal option_res = 0, // genauere Bitmessung option_b = 0, option_color = 0, wavloaded = 0; int wav_channel = 0; // audio channel: left /* -------------------------------------------------------------------------- */ #define BAUD_RATE 9616 //2*4800 int sample_rate = 0, bits_sample = 0, channels = 0; float samples_per_bit = 0; int findstr(char *buf, char *str, int pos) { int i; for (i = 0; i < 4; i++) { if (buf[(pos+i)%4] != str[i]) break; } return i; } 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)) 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)) return -1; samples_per_bit = sample_rate/(float)BAUD_RATE; fprintf(stderr, "samples/bit: %.2f\n", samples_per_bit); return 0; } #define EOF_INT 0x1000000 unsigned long sample_count = 0; double bitgrenze = 0; int read_signed_sample(FILE *fp) { // int = i32_t int byte, i, sample=0, s=0; // EOF -> 0x1000000 for (i = 0; i < channels; i++) { // i = 0: links bzw. mono byte = fgetc(fp); if (byte == EOF) return EOF_INT; if (i == wav_channel) sample = byte; if (bits_sample == 16) { byte = fgetc(fp); if (byte == EOF) return EOF_INT; if (i == wav_channel) sample += byte << 8; } } if (bits_sample == 8) s = sample-128; // 8bit: 00..FF, centerpoint 0x80=128 if (bits_sample == 16) s = (short)sample; sample_count++; return s; } int par=1, par_alt=1; int read_bits_fsk(FILE *fp, int *bit, int *len) { static int sample; int n, y0; float l, x1; static float x0; n = 0; do{ y0 = sample; sample = read_signed_sample(fp); if (sample == EOF_INT) return EOF; //sample_count++; // in read_signed_sample() par_alt = par; par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127) n++; } while (par*par_alt > 0); if (!option_res) l = (float)n / samples_per_bit; else { // genauere Bitlaengen-Messung x1 = sample/(float)(sample-y0); // hilft bei niedriger sample rate l = (n+x0-x1) / samples_per_bit; // meist mehr frames (nicht immer) x0 = x1; } *len = (int)(l+0.5); if (!option_inv) *bit = (1+par_alt)/2; // oben 1, unten -1 else *bit = (1-par_alt)/2; // sdr#= 0) ? 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 (option_inv) *bit ^= 1; return 0; } int read_rawbit2(FILE *fp, int *bit) { int sample; int sum; sum = 0; if (bitstart) { scount = 0; // eigentlich scount = 1 bitgrenze = 0; // oder bitgrenze = -1 bitstart = 0; } bitgrenze += samples_per_bit; do { sample = read_signed_sample(fp); if (sample == EOF_INT) return EOF; //sample_count++; // in read_signed_sample() //par = (sample >= 0) ? 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 { sample = read_signed_sample(fp); if (sample == EOF_INT) return EOF; //sample_count++; // in read_signed_sample() //par = (sample >= 0) ? 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 (option_inv) *bit ^= 1; return 0; } /* -------------------------------------------------------------------------- */ /* 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"; //"011001001001111100100000"; // M10: 64 9F 20 , M2K2: 64 8F 20 //"011101101001111100100000"; // M10: 76 9F 20 , aux-data? //"011001000100100100001001"; // M10-dop: 64 49 09 //"011001001010111100000010"; // M10gtop: 64 AF 02 char header[] = "10011001100110010100110010011001"; #define FRAME_LEN (100+1) // 0x64+1 #define BITFRAME_LEN (FRAME_LEN*BITS) #define RAWBITFRAME_LEN (BITFRAME_LEN*2) char buf[HEADLEN]; int bufpos = -1; #define FRAMESTART 0 #define AUX_LEN 20 #define BITAUX_LEN (AUX_LEN*BITS) #define RAWBITAUX_LEN (BITAUX_LEN*2) ui8_t frame_bytes[FRAME_LEN+AUX_LEN+2]; char frame_rawbits[RAWBITFRAME_LEN+RAWBITAUX_LEN+16]; // frame_rawbits-32="11001100110011001010011001001100"; char frame_bits[BITFRAME_LEN+BITAUX_LEN+8]; int auxlen = 0; // 0 .. 0x76-0x64 void inc_bufpos() { bufpos = (bufpos+1) % HEADLEN; } 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 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; 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; } 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; } /* -------------------------------------------------------------------------- */ // PSK (bzw. biphase-M (oder differential Manchester?)) // nach Synchronisation: 00,11->0 ; 01,10->1 (Phasenwechsel) void psk_bpm(char* frame_rawbits, char *frame_bits) { int i; char bit; //int err = 0; for (i = 0; i < BITFRAME_LEN+BITAUX_LEN; i++) { //if (i > 0 && (frame_rawbits[2*i] == frame_rawbits[2*i-1])) err = 1; if (frame_rawbits[2*i] == frame_rawbits[2*i+1]) bit = '0'; else bit = '1'; //if (err) frame_bits[i] = 'x'; else frame_bits[i] = bit; //err = 0; } } /* 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 */ /* 110101001101001101001101010101010011010011001100 101010011010011010011010101010100110100110011001011001100101011001100110011001100110011001100101100110011001100110011001100101010101010101010101010101101010100110011010011001011001011010101010010101100110100110010101100110011001011001100110100101011010101001100101010101101010011001010101100110010110100110010101100101100101100110101010011001100110010110011001100110011001100110100101011010101001101010100101100101100110011001100110011001100110011001100110011001011001101010011001100110011010101001100101100110100110011001010101101001100110010110011010100110100110011010100110011001010101101001100110010101100110011010101001100110101001100110011001100101100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011010011010100110100110011001100110011001100110011001100101101001011010100101101001101001100110100110100110010110010110101010010110010110011001011001010101010101010110011001100110011010011010100110011001011001100110011001100110011001100110011001100110011001100110101001011010011010010110010110010101010110010110011001101001101010101010011010100110011010011010011010100110101001100110011010100110010110011001010110101001101001100110100101011001100110011010011001100110011001100110010101011001100110011001100110100110101001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011010101001101001011001100101010101100110101001011001100110011001100110101001010110011001100110010110011001010110011001100110011001100110011001011001100101011010100101100110010110101001101001011001101001011001101010011010010110101001010101100110011001101010100110011001100000 */ int dpsk_bpm(char* frame_rawbits, char *frame_bits, int len) { int i; char bit; char bit0; //int err = 0; bit0 = (frame_rawbits[0] & 1) ^ 1; for (i = 0; i < len/2; i++) { if ((frame_rawbits[2*i ] & 1) == 1 && (frame_rawbits[2*i+1] & 1) == 0 ) bit = 1; else if ((frame_rawbits[2*i ] & 1) == 0 && (frame_rawbits[2*i+1] & 1) == 1 ) bit = 0; else { bit = 2; frame_bits[i] = 'x'; bit0 = bit&1; continue; //err = 1; } if (bit0 == bit) frame_bits[i] = '1'; else frame_bits[i] = '0'; // frame_bits[i] = 0x31 ^ (bit0 ^ bit); bit0 = bit; } return bit0; } /* -------------------------------------------------------------------------- */ #define stdFLEN 0x64 // pos[0]=0x64 #define pos_GPSlat 0x04 // 4 byte #define pos_GPSlon 0x08 // 4 byte #define pos_GPSalt 0x0C // 3 byte #define pos_GPSvE 0x0F // 2 byte #define pos_GPSvN 0x11 // 2 byte #define pos_GPSvU 0x13 // 2 byte #define pos_GPStime 0x15 // 3 byte #define pos_GPSdate 0x18 // 3 byte #define pos_SN 0x5D // 2+3 byte #define pos_Check (stdFLEN-1) // 2 byte #define ANSI_COLOR_RESET "\x1b[0m" #define col_GPSdate "\x1b[38;5;20m" // 3 byte #define col_GPStime "\x1b[38;5;27m" // 3 byte #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" /* -------------------------------------------------------------------------- */ int get_GPSpos() { int i; ui8_t bytes[4]; int val; for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSlat + i]; val = 0; for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i)); datum.lat = val; for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSlon + i]; val = 0; for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i)); datum.lon = val; for (i = 0; i < 3; i++) bytes[i] = frame_bytes[pos_GPSalt + i]; val = 0; for (i = 0; i < 3; i++) val |= bytes[i] << (8*(2-i)); if (val & 0x800000) val -= 0x1000000; // alt: signed 24bit? datum.alt = val; return 0; } int get_GPSvel() { int i; ui8_t bytes[2]; short vel16; double vx, vy, vz, dir; for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvE + i]; vel16 = bytes[0] << 8 | bytes[1]; datum.vE = vel16; vx = vel16 / 1e2; // east for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvN + i]; vel16 = bytes[0] << 8 | bytes[1]; datum.vN = vel16; vy= vel16 / 1e2; // north for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvU + i]; vel16 = bytes[0] << 8 | bytes[1]; datum.vU = vel16; vz = vel16 / 1e2; // up datum.vH = sqrt(vx*vx+vy*vy); dir = atan2(vx, vy) * 180 / M_PI; if (dir < 0) dir += 360; datum.vD = dir; datum.vV = vz; return 0; } int get_GPStime() { int i; ui8_t bytes[4]; int val; for (i = 0; i < 3; i++) bytes[i] = frame_bytes[pos_GPStime + i]; val = 0; for (i = 0; i < 3; i++) val |= bytes[i] << (8*(2-i)); datum.time = val; return 0; } int get_GPSdate() { int i; ui8_t bytes[4]; int val; for (i = 0; i < 3; i++) bytes[i] = frame_bytes[pos_GPSdate + i]; val = 0; for (i = 0; i < 3; i++) val |= bytes[i] << (8*(2-i)); datum.date = val; return 0; } /* -------------------------------------------------------------------------- */ int get_SN() { int i; unsigned byte; ui8_t sn_bytes[5]; for (i = 0; i < 11; i++) datum.SN[i] = ' '; datum.SN[11] = '\0'; for (i = 0; i < 5; i++) { byte = frame_bytes[pos_SN + i]; sn_bytes[i] = byte; } byte = sn_bytes[2]; sprintf(datum.SN, "%1X%02u", (byte>>4)&0xF, byte&0xF); byte = sn_bytes[3] | (sn_bytes[4]<<8); sprintf(datum.SN+3, " %1X %1u%04u", sn_bytes[0]&0xF, (byte>>13)&0x7, byte&0x1FFF); 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 */ 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; } 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; } /* -------------------------------------------------------------------------- */ int print_pos(int csOK) { int err; err = 0; err |= get_GPSpos(); err |= get_GPSvel(); err |= get_GPStime(); err |= get_GPSdate(); if (!err) { if (option_color) { fprintf(stdout, col_TXT); fprintf(stdout, " "col_GPSdate"%02d-%02d-%02d"col_TXT, datum.date/10000, (datum.date%10000)/100, datum.date%100); fprintf(stdout, " "col_GPStime"%02d:%02d:%02d "col_TXT, datum.time/10000, (datum.time%10000)/100, (datum.time%100)/1); fprintf(stdout, " lat: "col_GPSlat"%.6f"col_TXT"° ", datum.lat/1e6); fprintf(stdout, " lon: "col_GPSlon"%.6f"col_TXT"° ", datum.lon/1e6); fprintf(stdout, " alt: "col_GPSalt"%.2f"col_TXT"m ", datum.alt/1e2); //fprintf(stdout, " (%.1f , %.1f , %.1f) ", datum.vE/1e2, datum.vN/1e2, datum.vU/1e2); fprintf(stdout, " vH: "col_GPSvel"%.1f"col_TXT"m/s D: "col_GPSvel"%.1f"col_TXT"° vV: "col_GPSvel"%.1f"col_TXT"m/s", datum.vH, datum.vD, datum.vV); if (option_verbose >= 2) { get_SN(); fprintf(stdout, " SN: "col_SN"%s"col_TXT, datum.SN); fprintf(stdout, " # "); if (csOK) fprintf(stdout, " "col_CSok"[OK]"col_TXT); else fprintf(stdout, " "col_CSno"[NO]"col_TXT); } fprintf(stdout, ANSI_COLOR_RESET""); } else { fprintf(stdout, " %02d-%02d-%02d", datum.date/10000, (datum.date%10000)/100, datum.date%100); fprintf(stdout, " %02d:%02d:%02d ", datum.time/10000, (datum.time%10000)/100, (datum.time%100)/1); fprintf(stdout, " lat: %.6f° ", datum.lat/1e6); fprintf(stdout, " lon: %.6f° ", datum.lon/1e6); fprintf(stdout, " alt: %.2fm ", datum.alt/1e2); //fprintf(stdout, " (%.1f , %.1f , %.1f) ", datum.vE/1e2, datum.vN/1e2, datum.vU/1e2); fprintf(stdout, " vH: %.1fm/s D: %.1f° vV: %.1fm/s", datum.vH, datum.vD, datum.vV); if (option_verbose >= 2) { get_SN(); fprintf(stdout, " SN: %s", datum.SN); fprintf(stdout, " # "); if (csOK) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); } } } fprintf(stdout, "\n"); return err; } void print_frame(int pos) { int i; ui8_t byte; int cs1, cs2; int flen = stdFLEN; // stdFLEN=0x64, auxFLEN=0x76 if (option_b < 2) { dpsk_bpm(frame_rawbits, frame_bits, RAWBITFRAME_LEN+RAWBITAUX_LEN); } bits2bytes(frame_bits, frame_bytes); flen = frame_bytes[0]; if (flen == stdFLEN) auxlen = 0; else { auxlen = flen - stdFLEN; if (auxlen < 0 || auxlen > AUX_LEN) auxlen = 0; } cs1 = (frame_bytes[pos_Check] << 8) | frame_bytes[pos_Check+1]; cs2 = checkM10(frame_bytes, pos_Check); if (option_raw) { if (option_color && frame_bytes[1] != 0x49) { fprintf(stdout, col_FRTXT); for (i = 0; i < FRAME_LEN+auxlen; i++) { byte = frame_bytes[i]; 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+3)) fprintf(stdout, col_GPSalt); if ((i >= pos_GPSvE) && (i < pos_GPSvE+6)) fprintf(stdout, col_GPSvel); if ((i >= pos_GPStime) && (i < pos_GPStime+3)) fprintf(stdout, col_GPStime); if ((i >= pos_GPSdate) && (i < pos_GPSdate+3)) fprintf(stdout, col_GPSdate); if ((i >= pos_SN) && (i < pos_SN+5)) fprintf(stdout, col_SN); if ((i >= pos_Check) && (i < pos_Check+2)) fprintf(stdout, col_Check); fprintf(stdout, "%02x", byte); fprintf(stdout, col_FRTXT); } if (option_verbose) { 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+auxlen; i++) { byte = frame_bytes[i]; fprintf(stdout, "%02x", byte); } if (option_verbose) { fprintf(stdout, " # %04x", cs2); if (cs1 == cs2) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); } fprintf(stdout, "\n"); } } else print_pos(cs1 == cs2); } /* -------------------------------------------------------------------------- */ int main(int argc, char **argv) { FILE *fp; char *fpname; int i, len; int bit, bit0; int pos; int header_found = 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"); //fprintf(stderr, " -o, --offset\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, "-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, "--res") == 0) { option_res = 1; } else if (strcmp(*argv, "-b" ) == 0) { option_b = 1; } else if (strcmp(*argv, "-b2") == 0) { option_b = 2; } else if (strcmp(*argv, "--ch2") == 0) { wav_channel = 1; } // right channel (default: 0=left) else { fp = fopen(*argv, "rb"); if (fp == NULL) { fprintf(stderr, "%s konnte nicht geoeffnet werden\n", *argv); return -1; } wavloaded = 1; } ++argv; } if (!wavloaded) fp = stdin; i = read_wav_header(fp); if (i) { fclose(fp); return -1; } pos = FRAMESTART; while (!read_bits_fsk(fp, &bit, &len)) { if (len == 0) { // reset_frame(); if (pos > (pos_GPSdate+4)*2*BITS) { for (i = pos; i < RAWBITFRAME_LEN+RAWBITAUX_LEN; i++) frame_rawbits[i] = 0x30 + 0; print_frame(pos);//byte_count 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(); } else { frame_rawbits[pos] = 0x30 + bit; // Ascii pos++; if (pos == RAWBITFRAME_LEN+RAWBITAUX_LEN) { frame_rawbits[pos] = '\0'; print_frame(pos);//FRAME_LEN header_found = 0; pos = FRAMESTART; } } } if (header_found && option_b==1) { bitstart = 1; while ( pos < RAWBITFRAME_LEN+RAWBITAUX_LEN ) { if (read_rawbit(fp, &bit) == EOF) break; frame_rawbits[pos] = 0x30 + bit; pos++; } frame_rawbits[pos] = '\0'; print_frame(pos); header_found = 0; pos = FRAMESTART; } if (header_found && option_b>=2) { bitstart = 1; bit0 = 0; if (pos%2) { if (read_rawbit(fp, &bit) == EOF) break; frame_rawbits[pos] = 0x30 + bit; pos++; } bit0 = dpsk_bpm(frame_rawbits, frame_bits, pos); pos /= 2; while ( pos < BITFRAME_LEN+BITAUX_LEN ) { if (read_rawbit2(fp, &bit) == EOF) break; frame_bits[pos] = 0x31 ^ (bit0 ^ bit); pos++; bit0 = bit; } frame_bits[pos] = '\0'; print_frame(pos); header_found = 0; pos = FRAMESTART; } } fprintf(stdout, "\n"); fclose(fp); return 0; }