From c7d27afad0b202377f58a7b74582ae6a80b21121 Mon Sep 17 00:00:00 2001 From: Zilog80 Date: Sat, 5 Dec 2015 20:01:46 +0100 Subject: [PATCH] M10: source --- m10/m10x.c | 685 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 685 insertions(+) create mode 100644 m10/m10x.c diff --git a/m10/m10x.c b/m10/m10x.c new file mode 100644 index 0000000..4c5e8f4 --- /dev/null +++ b/m10/m10x.c @@ -0,0 +1,685 @@ + +/* big endian forest + * + * gcc -o m10x m10x.c + * + */ + + +#include +#include +#include +// #include +#ifdef WIN + #include // cygwin: _setmode() + #include +#endif + +typedef unsigned char ui8_t; +typedef unsigned short ui16_t; + +typedef struct { + int week; int gpssec; + int jahr; int monat; int tag; + int wday; + int std; int min; int sek; + double lat; double lon; double h; +} 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_color = 0, + wavloaded = 0; +int inv = 1; + +/* -------------------------------------------------------------------------- */ +/* + * Convert GPS Week and Seconds to Modified Julian Day. + * - Adapted from sci.astro FAQ. + * - Ignores UTC leap seconds. + */ +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; +} +/* -------------------------------------------------------------------------- */ + +#define BAUD_RATE 9600 //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[5] = "\0\0\0\0"; + char buff[4]; + int byte, p=0; + // long pos_fmt, pos_dat; + char fmt_[5] = "fmt "; + char data[5] = "data"; + + //if (fseek(fp, 0L, SEEK_SET)) return -1; + if (fread(txt, 1, 4, fp) < 4) return -1; + if (strncmp(txt, "RIFF", 4)) return -1; + + // pos_WAVE = 8L + if (fread(txt, 1, 4, fp) < 4) return -1; + 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; + buff[p % 4] = byte; + p++; if (p==4) p=0; + if (findstr(buff, fmt_, p) == 4) break; + } + + if (fread(buff, 1, 4, fp) < 4) return -1; + //memcpy(&byte, buff, 4); fprintf(stderr, "fmt_length : %04x\n", byte); + if (fread(buff, 1, 2, fp) < 2) return -1; + //byte = buff[0] + (buff[1] << 8); fprintf(stderr, "fmt_tag : %04x\n", byte & 0xFFFF); + if (fread(buff, 1, 2, fp) < 2) return -1; + channels = buff[0] + (buff[1] << 8); + //fprintf(stderr, "channels : %d\n", channels & 0xFFFF); + if (fread(buff, 1, 4, fp) < 4) return -1; + memcpy(&sample_rate, buff, 4); + //fprintf(stderr, "samplerate : %d\n", sample_rate); + if (fread(buff, 1, 4, fp) < 4) return -1; + //memcpy(&byte, buff, 4); fprintf(stderr, "bytes/sec : %d\n", byte); + if (fread(buff, 1, 2, fp) < 2) return -1; + byte = buff[0] + (buff[1] << 8); + //fprintf(stderr, "block_align: %04x\n", byte & 0xFFFF); + if (fread(buff, 1, 2, fp) < 2) return -1; + bits_sample = buff[0] + (buff[1] << 8); + //fprintf(stderr, "bits/sample: %d\n", bits_sample & 0xFFFF); + + // pos_dat = 36L + info + //if (fread(txt, 1, 4, fp) < 4) return -1; + //fprintf(stderr, "data: %s\n", txt); + for ( ; ; ) { + if ( (byte=fgetc(fp)) == EOF ) return -1; + buff[p % 4] = byte; + p++; if (p==4) p=0; + if (findstr(buff, data, p) == 4) break; + } + if (fread(buff, 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 + +int read_signed_sample(FILE *fp) { // int = i32_t + int byte, i, ret; // EOF -> 0x1000000 + + for (i = 0; i < channels; i++) { + // i = 0: links bzw. mono + byte = fgetc(fp); + if (byte == EOF) return EOF_INT; + if (i == 0) ret = byte; + + if (bits_sample == 16) { + byte = fgetc(fp); + if (byte == EOF) return EOF_INT; + if (i == 0) ret += byte << 8; + } + + } + + if (bits_sample == 8) return ret-128; // 8bit: 00..FF, centerpoint 0x80=128 + if (bits_sample == 16) return (short)ret; + + return ret; +} + +int par=1, par_alt=1; +unsigned long sample_count = 0; + +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; + if (option_inv) sample = -sample; + sample_count++; + 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 (inv > 0) *bit = (1+par_alt)/2; // oben 1, unten -1 + else *bit = (1-par_alt)/2; // sdr#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; 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; + + } +} + +/* -------------------------------------------------------------------------- */ + +#define pos_GPSTOW 0x0A // 4 byte +#define pos_GPSlat 0x0E // 4 byte +#define pos_GPSlon 0x12 // 4 byte +#define pos_GPSheight 0x16 // 4 byte +#define pos_GPSweek 0x20 // 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_GPSheight "\x1b[38;5;82m" // 4 byte +#define col_TXT "\x1b[38;5;244m" +#define col_FRTXT "\x1b[38;5;244m" + +/* +$ for code in {0..255} +> do echo -e "\e[38;5;${code}m"'\\e[38;5;'"$code"m"\e[0m" +> done +*/ + +int get_GPSweek() { + int i; + unsigned byte; + ui8_t gpsweek_bytes[2]; + int gpsweek; + + for (i = 0; i < 2; i++) { + byte = frame_bytes[pos_GPSweek + i]; + if (byte > 0xFF) return -1; + gpsweek_bytes[i] = byte; + } + + gpsweek = (gpsweek_bytes[0] << 8) + gpsweek_bytes[1]; + datum.week = gpsweek; + + if (gpsweek < 0 || gpsweek > 3000) return -1; + + return 0; +} + +char weekday[7][3] = { "So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"}; + +int get_GPStime() { + int i; + unsigned byte; + ui8_t gpstime_bytes[4]; + int gpstime, day; // int ms; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSTOW + i]; + if (byte > 0xFF) return -1; + gpstime_bytes[i] = byte; + } + + gpstime = 0; + for (i = 0; i < 4; i++) { + gpstime |= gpstime_bytes[i] << (8*(3-i)); + } + + //ms = gpstime % 1000; + gpstime /= 1000; + datum.gpssec = gpstime; + + day = gpstime / (24 * 3600); + gpstime %= (24*3600); + + if ((day < 0) || (day > 6)) return -1; + datum.wday = day; + datum.std = gpstime/3600; + datum.min = (gpstime%3600)/60; + datum.sek = gpstime%60; + + return 0; +} + +double B60B60 = 0xB60B60; // 2^32/360 = 0xB60B60.xxx + +int get_GPSlat() { + int i; + unsigned byte; + ui8_t gpslat_bytes[4]; + int gpslat; + double lat; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSlat + i]; + if (byte > 0xFF) return -1; + gpslat_bytes[i] = byte; + } + + gpslat = 0; + for (i = 0; i < 4; i++) { + gpslat |= gpslat_bytes[i] << (8*(3-i)); + } + lat = gpslat / B60B60; + datum.lat = lat; + + return 0; +} + +int get_GPSlon() { + int i; + unsigned byte; + ui8_t gpslon_bytes[4]; + int gpslon; + double lon; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSlon + i]; + if (byte > 0xFF) return -1; + gpslon_bytes[i] = byte; + } + + gpslon = 0; + for (i = 0; i < 4; i++) { + gpslon |= gpslon_bytes[i] << (8*(3-i)); + } + lon = gpslon / B60B60; + datum.lon = lon; + + return 0; +} + +int get_GPSheight() { + int i; + unsigned byte; + ui8_t gpsheight_bytes[4]; + int gpsheight; + double height; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSheight + i]; + if (byte > 0xFF) return -1; + gpsheight_bytes[i] = byte; + } + + gpsheight = 0; + for (i = 0; i < 4; i++) { + gpsheight |= gpsheight_bytes[i] << (8*(3-i)); + } + height = gpsheight / 1000.0; + datum.h = height; + + return 0; +} + +/* -------------------------------------------------------------------------- */ + +int print_pos() { + int err; + + err = 0; + err |= get_GPSweek(); + err |= get_GPStime(); + err |= get_GPSlat(); + err |= get_GPSlon(); + err |= get_GPSheight(); + + if (!err) { + + Gps2Date(datum.week, datum.gpssec, &datum.jahr, &datum.monat, &datum.tag); + + if (option_color) { + printf(col_TXT); + printf(" (W "col_GPSweek"%d"col_TXT") ", datum.week); + printf(col_GPSTOW"%s"col_TXT" ", weekday[datum.wday]); + printf(col_GPSdate"%04d-%02d-%02d"col_TXT" ("col_GPSTOW"%02d:%02d:%02d"col_TXT") ", + datum.jahr, datum.monat, datum.tag, datum.std, datum.min, datum.sek); + printf(" lat: "col_GPSlat"%.6f"col_TXT" ", datum.lat); + printf(" lon: "col_GPSlon"%.6f"col_TXT" ", datum.lon); + printf(" h: "col_GPSheight"%.2f"col_TXT" ", datum.h); + printf(ANSI_COLOR_RESET"\n"); + } + else { + printf(" (W %d) ", datum.week); + printf("%s ", weekday[datum.wday]); + printf("%04d-%02d-%02d (%02d:%02d:%02d) ", + datum.jahr, datum.monat, datum.tag, datum.std, datum.min, datum.sek); + printf(" lat: %.6f ", datum.lat); + printf(" lon: %.6f ", datum.lon); + printf(" h: %.2f ", datum.h); + printf("\n"); + } + + } + + return err; +} + +void print_frame(int pos) { + int i; + ui8_t byte; + + psk_bpm(frame_rawbits, frame_bits); + bits2bytes(frame_bits, frame_bytes); + + if (option_raw) { + + if (option_color) { + fprintf(stdout, col_FRTXT); + for (i = 0; i < FRAME_LEN; i++) { + byte = frame_bytes[i]; + if ((i >= pos_GPSTOW) && (i < pos_GPSTOW+4)) 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_GPSheight) && (i < pos_GPSheight+4)) fprintf(stdout, col_GPSheight); + if ((i >= pos_GPSweek) && (i < pos_GPSweek+2)) fprintf(stdout, col_GPSweek); + fprintf(stdout, "%02x", byte); + fprintf(stdout, col_FRTXT); + } + fprintf(stdout, ANSI_COLOR_RESET"\n"); + } + else { + for (i = 0; i < FRAME_LEN; i++) { + byte = frame_bytes[i]; + fprintf(stdout, "%02x", byte); + } + fprintf(stdout, "\n"); + } + + } + else print_pos(); + +} + + +int main(int argc, char **argv) { + + FILE *fp; + char *fpname; + int i, bit, len; + int pos; + + +#ifdef WIN + _setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY); + setbuf(stdout, NULL); +#endif + + 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, "-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 { + 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; + } + + + bufpos = 0; + pos = FRAMESTART; + + while (!read_bits_fsk(fp, &bit, &len)) { + + if (len == 0) { // reset_frame(); + if (pos > (pos_GPSweek+2)*2*BYTELEN) { + for (i = pos; i < RAWBITFRAME_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(); + if (header_found != 0) { + inv = header_found; + } + } + else { + frame_rawbits[pos] = 0x30 + bit; // Ascii + pos++; + + if (pos == RAWBITFRAME_LEN) { + print_frame(pos);//FRAME_LEN + header_found = 0; + pos = FRAMESTART; + } + } + + } + } + + printf("\n"); + + fclose(fp); + + return 0; +} +