kopia lustrzana https://github.com/projecthorus/radiosonde_auto_rx
930 wiersze
24 KiB
C
930 wiersze
24 KiB
C
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/*
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*
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* DFM-06 und DFM-09 haben unterschiedliche Polaritaet bzw. Manchester-Varianten
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* DFM-06 hat Kanaele 0..6 (anfangs nur 0..5)
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* DFM-09 hat Kanaele 0..A
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* Ausnahme: erste DFM-09-Versionen senden wie DFM-06
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*
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* Optionen:
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* -v, -vv verbose/velocity, SN
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* -r, -R raw frames
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* -i invertiert Signal (DFM-06 / DFM-09)
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* -b alternative Demodulation
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* --avg moving average
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* --ecc Hamming Error Correction
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*
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* 2017-08-01:
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* Test/Pilotsonde? Kanaele 0..C
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*/
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#include <stdio.h>
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#include <string.h>
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//#include <math.h>
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#include <stdlib.h>
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#ifdef CYGWIN
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#include <fcntl.h> // cygwin: _setmode()
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#include <io.h>
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#endif
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typedef unsigned char ui8_t;
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typedef unsigned int ui32_t;
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typedef struct {
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int frnr;
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int sonde_typ;
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ui32_t SN6;
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ui32_t SN9;
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ui32_t SNC;
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int week; int gpssec;
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int jahr; int monat; int tag;
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int std; int min;
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float sek;
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double lat1; double lon1; double alt1;
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double dir1; double horiV1; double vertV1;
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double lat2; double lon2; double alt2;
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double dir2; double horiV2; double vertV2;
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} gpx_t;
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gpx_t gpx;
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char dat_str[9][13+1];
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int option_verbose = 0, // ausfuehrliche Anzeige
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option_raw = 0, // rohe Frames
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option_inv = 0, // invertiert Signal
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option_auto = 0,
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option_avg = 0, // moving average
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option_b = 0,
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option_ecc = 0,
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wavloaded = 0;
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int start = 0;
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/* -------------------------------------------------------------------------- */
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// option_b: exakte Baudrate wichtig!
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// eventuell in header ermittelbar
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#define BAUD_RATE 2500
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int sample_rate = 0, bits_sample = 0, channels = 0;
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float samples_per_bit = 0;
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int findstr(char *buff, char *str, int pos) {
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int i;
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for (i = 0; i < 4; i++) {
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if (buff[(pos+i)%4] != str[i]) break;
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}
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return i;
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}
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int read_wav_header(FILE *fp) {
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char txt[4+1] = "\0\0\0\0";
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unsigned char dat[4];
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int byte, p=0;
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if (fread(txt, 1, 4, fp) < 4) return -1;
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if (strncmp(txt, "RIFF", 4)) return -1;
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if (fread(txt, 1, 4, fp) < 4) return -1;
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// pos_WAVE = 8L
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if (fread(txt, 1, 4, fp) < 4) return -1;
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if (strncmp(txt, "WAVE", 4)) return -1;
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// pos_fmt = 12L
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for ( ; ; ) {
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if ( (byte=fgetc(fp)) == EOF ) return -1;
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txt[p % 4] = byte;
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p++; if (p==4) p=0;
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if (findstr(txt, "fmt ", p) == 4) break;
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}
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if (fread(dat, 1, 4, fp) < 4) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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channels = dat[0] + (dat[1] << 8);
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if (fread(dat, 1, 4, fp) < 4) return -1;
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memcpy(&sample_rate, dat, 4); //sample_rate = dat[0]|(dat[1]<<8)|(dat[2]<<16)|(dat[3]<<24);
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if (fread(dat, 1, 4, fp) < 4) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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//byte = dat[0] + (dat[1] << 8);
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if (fread(dat, 1, 2, fp) < 2) return -1;
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bits_sample = dat[0] + (dat[1] << 8);
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// pos_dat = 36L + info
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for ( ; ; ) {
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if ( (byte=fgetc(fp)) == EOF ) return -1;
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txt[p % 4] = byte;
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p++; if (p==4) p=0;
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if (findstr(txt, "data", p) == 4) break;
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}
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if (fread(dat, 1, 4, fp) < 4) return -1;
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fprintf(stderr, "sample_rate: %d\n", sample_rate);
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fprintf(stderr, "bits : %d\n", bits_sample);
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fprintf(stderr, "channels : %d\n", channels);
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if ((bits_sample != 8) && (bits_sample != 16)) return -1;
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samples_per_bit = sample_rate/(float)BAUD_RATE;
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fprintf(stderr, "samples/bit: %.2f\n", samples_per_bit);
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return 0;
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}
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#define EOF_INT 0x1000000
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#define LEN_movAvg 3
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int movAvg[LEN_movAvg];
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unsigned long sample_count = 0;
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int read_signed_sample(FILE *fp) { // int = i32_t
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int byte, i, sample, s=0; // EOF -> 0x1000000
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for (i = 0; i < channels; i++) {
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// i = 0: links bzw. mono
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byte = fgetc(fp);
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if (byte == EOF) return EOF_INT;
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if (i == 0) sample = byte;
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if (bits_sample == 16) {
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byte = fgetc(fp);
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if (byte == EOF) return EOF_INT;
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if (i == 0) sample += byte << 8;
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}
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}
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if (bits_sample == 8) s = sample-128; // 8bit: 00..FF, centerpoint 0x80=128
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if (bits_sample == 16) s = (short)sample;
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if (option_avg) {
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movAvg[sample_count % LEN_movAvg] = s;
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s = 0;
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for (i = 0; i < LEN_movAvg; i++) s += movAvg[i];
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s = (s+0.5) / LEN_movAvg;
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}
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sample_count++;
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return s;
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}
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int par=1, par_alt=1;
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int read_bits_fsk(FILE *fp, int *bit, int *len) {
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static int sample;
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int n;
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float l;
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n = 0;
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do {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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par_alt = par;
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par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
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n++;
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} while (par*par_alt > 0);
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l = (float)n / samples_per_bit;
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*len = (int)(l+0.5);
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if (!option_inv) *bit = (1+par_alt)/2; // oben 1, unten -1
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else *bit = (1-par_alt)/2; // sdr#<rev1381?, invers: unten 1, oben -1
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// *bit = (1+inv*par_alt)/2; // ausser inv=0
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/* Y-offset ? */
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return 0;
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}
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int bitstart = 0;
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double bitgrenze = 0;
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unsigned long scount = 0;
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int read_rawbit(FILE *fp, int *bit) {
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int sample;
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int sum;
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sum = 0;
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if (bitstart) {
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scount = 0; // eigentlich scount = 1
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bitgrenze = 0; // oder bitgrenze = -1
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bitstart = 0;
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}
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bitgrenze += samples_per_bit;
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do {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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//sample_count++; // in read_signed_sample()
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//par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
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sum += sample;
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scount++;
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} while (scount < bitgrenze); // n < samples_per_bit
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if (sum >= 0) *bit = 1;
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else *bit = 0;
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if (option_inv) *bit ^= 1;
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return 0;
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}
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int read_rawbit2(FILE *fp, int *bit) {
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int sample;
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int sum;
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sum = 0;
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if (bitstart) {
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scount = 0; // eigentlich scount = 1
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bitgrenze = 0; // oder bitgrenze = -1
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bitstart = 0;
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}
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bitgrenze += samples_per_bit;
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do {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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//sample_count++; // in read_signed_sample()
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//par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
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sum += sample;
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scount++;
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} while (scount < bitgrenze); // n < samples_per_bit
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bitgrenze += samples_per_bit;
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do {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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//sample_count++; // in read_signed_sample()
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//par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
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sum -= sample;
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scount++;
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} while (scount < bitgrenze); // n < samples_per_bit
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if (sum >= 0) *bit = 1;
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else *bit = 0;
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if (option_inv) *bit ^= 1;
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return 0;
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}
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float *wc = NULL;
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int read_rawbit3(FILE *fp, int *bit) {
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int sample;
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int n;
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float sum;
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sum = 0;
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n = 0;
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if (bitstart) {
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n = 1; // sample*wc[0] ?
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scount = 1; // (sample_count overflow/wrap-around)
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bitgrenze = 0; // d.h. bitgrenze = sample_count-1 (?)
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bitstart = 0;
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}
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bitgrenze += 2*samples_per_bit;
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do {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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//sample_count++; // in read_signed_sample()
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//par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
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sum += sample*wc[n];
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n++;
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scount++;
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} while (scount < bitgrenze); // n < samples_per_bit
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if (sum >= 0) *bit = 1;
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else *bit = 0;
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if (option_inv) *bit ^= 1;
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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//#define BITS (2*8) // 16
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#define HEADLEN 32 // HEADLEN+HEADOFS=32 <= strlen(header)
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#define HEADOFS 0
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char header[] = "01100101011001101010010110101010";
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char buf[HEADLEN+1] = "xxxxxxxxxx\0";
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int bufpos = -1;
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#define BITFRAME_LEN 280
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#define RAWBITFRAME_LEN (BITFRAME_LEN*2)
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#define FRAMESTART (HEADOFS+HEADLEN)
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char frame_rawbits[RAWBITFRAME_LEN+8] = "01100101011001101010010110101010"; //->"0100010111001111";
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char frame_bits[BITFRAME_LEN+4];
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void inc_bufpos() {
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bufpos = (bufpos+1) % HEADLEN;
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}
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char cb_inv(char c) {
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if (c == '0') return '1';
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if (c == '1') return '0';
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return c;
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}
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// Gefahr bei Manchester-Codierung: inverser Header wird leicht fehl-erkannt
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// da manchester1 und manchester2 nur um 1 bit verschoben
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int compare2() {
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int i, j;
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i = 0;
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j = bufpos;
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while (i < HEADLEN) {
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if (j < 0) j = HEADLEN-1;
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if (buf[j] != header[HEADOFS+HEADLEN-1-i]) break;
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j--;
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i++;
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}
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if (i == HEADLEN) return 1;
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if (option_auto) {
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i = 0;
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j = bufpos;
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while (i < HEADLEN) {
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if (j < 0) j = HEADLEN-1;
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if (buf[j] != cb_inv(header[HEADOFS+HEADLEN-1-i])) break;
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j--;
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i++;
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}
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if (i == HEADLEN) return -1;
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}
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return 0;
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}
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// manchester1 1->10,0->01: 1.bit
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// manchester2 0->10,1->01: 2.bit
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void manchester1(char* frame_rawbits, char *frame_bits, int pos) {
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int i, c, out, buf;
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char bit, bits[2];
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c = 0;
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for (i = 0; i < pos/2; i++) { // -16
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bits[0] = frame_rawbits[2*i];
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bits[1] = frame_rawbits[2*i+1];
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if ((bits[0] == '0') && (bits[1] == '1')) { bit = '0'; out = 1; }
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else
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if ((bits[0] == '1') && (bits[1] == '0')) { bit = '1'; out = 1; }
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else { //
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if (buf == 0) { c = !c; out = 0; buf = 1; }
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else { bit = 'x'; out = 1; buf = 0; }
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}
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if (out) frame_bits[i] = bit;
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}
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}
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/* -------------------------------------------------------------------------- */
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#define B 8 // codeword: 8 bit
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#define S 4 // davon 4 bit data
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#define HEAD 0 // 16 bit
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#define CONF (16+0) // 56 bit
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#define DAT1 (16+56) // 104 bit
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#define DAT2 (16+160) // 104 bit
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// frame: 280 bit
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ui8_t H[4][8] = // Parity-Check
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{{ 0, 1, 1, 1, 1, 0, 0, 0},
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{ 1, 0, 1, 1, 0, 1, 0, 0},
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{ 1, 1, 0, 1, 0, 0, 1, 0},
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{ 1, 1, 1, 0, 0, 0, 0, 1}};
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ui8_t He[8] = { 0x7, 0xB, 0xD, 0xE, 0x8, 0x4, 0x2, 0x1}; // Spalten von H:
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// 1-bit-error-Syndrome
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ui8_t hamming_conf[ 7*B]; // 7*8=56
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ui8_t hamming_dat1[13*B]; // 13*8=104
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ui8_t hamming_dat2[13*B];
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ui8_t block_conf[ 7*S]; // 7*4=28
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ui8_t block_dat1[13*S]; // 13*4=52
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ui8_t block_dat2[13*S];
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ui32_t bits2val(ui8_t *bits, int len) { // big endian
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int j;
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ui32_t val;
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if ((len < 0) || (len > 32)) return -1;
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val = 0;
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for (j = 0; j < len; j++) {
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val |= (bits[j] << (len-1-j));
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}
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return val;
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}
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void deinterleave(char *str, int L, ui8_t *block) {
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int i, j;
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for (j = 0; j < B; j++) { // L = 7, 13
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for (i = 0; i < L; i++) {
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if (str[L*j+i] >= 0x30 && str[L*j+i] <= 0x31) {
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block[B*i+j] = str[L*j+i] - 0x30; // ASCII -> bit
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}
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}
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}
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}
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int check(ui8_t code[8]) {
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int i, j; // Bei Demodulierung durch Nulldurchgaenge, wenn durch Fehler ausser Takt,
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ui32_t synval = 0; // verschieben sich die bits. Fuer Hamming-Decode waere es besser,
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ui8_t syndrom[4]; // sync zu Beginn mit Header und dann Takt beibehalten fuer decision.
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int ret=0;
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for (i = 0; i < 4; i++) { // S = 4
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syndrom[i] = 0;
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for (j = 0; j < 8; j++) { // B = 8
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syndrom[i] ^= H[i][j] & code[j];
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}
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}
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synval = bits2val(syndrom, 4);
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if (synval) {
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ret = -1;
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for (j = 0; j < 8; j++) { // 1-bit-error
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if (synval == He[j]) { // reicht auf databits zu pruefen, d.h.
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ret = j+1; // (systematischer Code) He[0..3]
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break;
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}
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}
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}
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else ret = 0;
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if (ret > 0) code[ret-1] ^= 0x1;
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return ret;
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}
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int hamming(ui8_t *ham, int L, ui8_t *sym) {
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int i, j;
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int ret = 0; // L = 7, 13
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for (i = 0; i < L; i++) { // L * 2 nibble (data+parity)
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if (option_ecc) ret |= check(ham+B*i);
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for (j = 0; j < S; j++) { // systematic: bits 0..S-1 data
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sym[S*i+j] = ham[B*i+j];
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}
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}
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return ret;
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}
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char nib2chr(ui8_t nib) {
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char c = '_';
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if (nib < 0x10) {
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if (nib < 0xA) c = 0x30 + nib;
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else c = 0x41 + nib-0xA;
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}
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return c;
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}
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int dat_out(ui8_t *dat_bits) {
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int i, ret = 0;
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static int fr_id;
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// int jahr = 0, monat = 0, tag = 0, std = 0, min = 0;
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int frnr = 0;
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int msek = 0;
|
|
int lat = 0, lon = 0, alt = 0;
|
|
int nib;
|
|
int dvv; // signed/unsigned 16bit
|
|
|
|
fr_id = bits2val(dat_bits+48, 4);
|
|
|
|
|
|
if (fr_id >= 0 && fr_id <= 8) {
|
|
for (i = 0; i < 13; i++) {
|
|
nib = bits2val(dat_bits+4*i, 4);
|
|
dat_str[fr_id][i] = nib2chr(nib);
|
|
}
|
|
dat_str[fr_id][13] = '\0';
|
|
}
|
|
|
|
if (fr_id == 0) {
|
|
start = 1;
|
|
msek = bits2val(dat_bits, 16);
|
|
gpx.sek = msek/1000.0;
|
|
// bits2val(dat_bits+16, 8); ?
|
|
frnr = bits2val(dat_bits+24, 8);
|
|
gpx.frnr = frnr;
|
|
dvv = (short)bits2val(dat_bits+32, 16); // (short)? zusammen mit dir sollte unsigned sein
|
|
gpx.horiV1 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 1) {
|
|
lat = bits2val(dat_bits, 32);
|
|
gpx.lat1 = lat/1e7;
|
|
dvv = bits2val(dat_bits+32, 16) & 0xFFFF; // unsigned
|
|
gpx.dir1 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 2) {
|
|
lon = bits2val(dat_bits, 32);
|
|
gpx.lon1 = lon/1e7;
|
|
dvv = (short)bits2val(dat_bits+32, 16); // signed
|
|
gpx.vertV1 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 3) {
|
|
alt = bits2val(dat_bits, 32);
|
|
gpx.alt1 = alt/1e2;
|
|
}
|
|
|
|
if (fr_id == 5) {
|
|
lat = bits2val(dat_bits, 32);
|
|
gpx.lat2 = lat/1e7;
|
|
dvv = (short)bits2val(dat_bits+32, 16); // (short)? zusammen mit dir sollte unsigned sein
|
|
gpx.horiV2 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 6) {
|
|
lon = bits2val(dat_bits, 32);
|
|
gpx.lon2 = lon/1e7;
|
|
dvv = bits2val(dat_bits+32, 16) & 0xFFFF; // unsigned
|
|
gpx.dir2 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 7) {
|
|
alt = bits2val(dat_bits, 32);
|
|
gpx.alt2 = alt/1e2;
|
|
dvv = (short)bits2val(dat_bits+32, 16); // signed
|
|
gpx.vertV2 = dvv/1e2;
|
|
}
|
|
|
|
if (fr_id == 8) {
|
|
gpx.jahr = bits2val(dat_bits, 12);
|
|
gpx.monat = bits2val(dat_bits+12, 4);
|
|
gpx.tag = bits2val(dat_bits+16, 5);
|
|
gpx.std = bits2val(dat_bits+21, 5);
|
|
gpx.min = bits2val(dat_bits+26, 6);
|
|
}
|
|
|
|
ret = fr_id;
|
|
return ret;
|
|
}
|
|
|
|
#define SNbit 0x0100
|
|
int conf_out(ui8_t *conf_bits) {
|
|
int conf_id;
|
|
int ret = 0;
|
|
int val, hl;
|
|
static int chCbit, chC[2];
|
|
ui32_t SN6, SN9, SNC;
|
|
|
|
conf_id = bits2val(conf_bits, 4);
|
|
|
|
if (conf_id == 0xC) { // 0xCCxxxxy
|
|
val = bits2val(conf_bits+8, 4*5);
|
|
hl = (val & 1) == 0;
|
|
chC[hl] = (val >> 4) & 0xFFFF;
|
|
chCbit |= 1 << hl;
|
|
if (chCbit == 3) {
|
|
SNC = (chC[1] << 16) | chC[0];
|
|
if ( SNC == gpx.SNC ) {
|
|
gpx.sonde_typ = SNbit | 0xC;
|
|
ret = 9;
|
|
}
|
|
else {
|
|
gpx.sonde_typ = 0;
|
|
}
|
|
gpx.SNC = SNC;
|
|
chCbit = 0;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
void print_gpx() {
|
|
int i, j;
|
|
|
|
if (start) {
|
|
|
|
if (option_raw == 2) {
|
|
for (i = 0; i < 9; i++) {
|
|
printf(" %s", dat_str[i]);
|
|
}
|
|
for (i = 0; i < 9; i++) {
|
|
for (j = 0; j < 13; j++) dat_str[i][j] = ' ';
|
|
}
|
|
}
|
|
else {
|
|
if (option_auto && option_verbose) printf("[%c] ", option_inv?'-':'+');
|
|
printf("[%3d] ", gpx.frnr);
|
|
printf("%4d-%02d-%02d ", gpx.jahr, gpx.monat, gpx.tag);
|
|
printf("%02d:%02d:%04.1f ", gpx.std, gpx.min, gpx.sek);
|
|
printf(" ");
|
|
printf("lat: %.6f ", gpx.lat1);
|
|
printf("lon: %.6f ", gpx.lon1);
|
|
printf("alt: %.1f ", gpx.alt1);
|
|
printf(" vH: %5.2f ", gpx.horiV1);
|
|
printf(" D: %5.1f ", gpx.dir1);
|
|
printf(" vV: %5.2f ", gpx.vertV1);
|
|
printf("\n");
|
|
printf(" ");
|
|
printf(" ");
|
|
printf(" ");
|
|
printf(" ");
|
|
printf("lat: %.6f ", gpx.lat2);
|
|
printf("lon: %.6f ", gpx.lon2);
|
|
printf("alt: %.1f ", gpx.alt2);
|
|
printf(" vH: %5.2f ", gpx.horiV2);
|
|
printf(" D: %5.1f ", gpx.dir2);
|
|
printf(" vV: %5.2f ", gpx.vertV2);
|
|
if (option_verbose && (gpx.sonde_typ & SNbit))
|
|
{
|
|
/*
|
|
if ((gpx.sonde_typ & 0xFF) == 6) {
|
|
printf(" (ID%1d:%06X) ", gpx.sonde_typ & 0xF, gpx.SN6);
|
|
}
|
|
if ((gpx.sonde_typ & 0xFF) == 9) {
|
|
printf(" (ID%1d:%06u) ", gpx.sonde_typ & 0xF, gpx.SN9);
|
|
}
|
|
*/
|
|
if ((gpx.sonde_typ & 0xFF) == 0xC) {
|
|
printf(" (ID%1x:%06u) ", gpx.sonde_typ & 0xF, gpx.SNC);
|
|
}
|
|
gpx.sonde_typ ^= SNbit;
|
|
}
|
|
}
|
|
printf("\n");
|
|
|
|
}
|
|
}
|
|
|
|
void print_frame() {
|
|
int i;
|
|
int nib = 0;
|
|
int frid = -1;
|
|
int ret0, ret1, ret2;
|
|
|
|
if (option_b < 2) {
|
|
manchester1(frame_rawbits, frame_bits, RAWBITFRAME_LEN);
|
|
}
|
|
|
|
deinterleave(frame_bits+CONF, 7, hamming_conf);
|
|
deinterleave(frame_bits+DAT1, 13, hamming_dat1);
|
|
deinterleave(frame_bits+DAT2, 13, hamming_dat2);
|
|
|
|
ret0 = hamming(hamming_conf, 7, block_conf);
|
|
ret1 = hamming(hamming_dat1, 13, block_dat1);
|
|
ret2 = hamming(hamming_dat2, 13, block_dat2);
|
|
|
|
if (option_raw == 1) {
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
nib = bits2val(block_conf+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (option_ecc) {
|
|
if (ret0 == 0) printf(" [OK] ");
|
|
else if (ret0 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
printf(" ");
|
|
for (i = 0; i < 13; i++) {
|
|
nib = bits2val(block_dat1+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (option_ecc) {
|
|
if (ret1 == 0) printf(" [OK] ");
|
|
else if (ret1 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
printf(" ");
|
|
for (i = 0; i < 13; i++) {
|
|
nib = bits2val(block_dat2+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (option_ecc) {
|
|
if (ret2 == 0) printf(" [OK] ");
|
|
else if (ret2 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
printf("\n");
|
|
|
|
}
|
|
else if (option_ecc) {
|
|
|
|
if (ret0 == 0 || ret0 > 0) {
|
|
conf_out(block_conf);
|
|
}
|
|
if (ret1 == 0 || ret1 > 0) {
|
|
frid = dat_out(block_dat1);
|
|
if (frid == 8) print_gpx();
|
|
}
|
|
if (ret2 == 0 || ret2 > 0) {
|
|
frid = dat_out(block_dat2);
|
|
if (frid == 8) print_gpx();
|
|
}
|
|
|
|
}
|
|
else {
|
|
|
|
conf_out(block_conf);
|
|
frid = dat_out(block_dat1);
|
|
if (frid == 8) print_gpx();
|
|
frid = dat_out(block_dat2);
|
|
if (frid == 8) print_gpx();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
FILE *fp;
|
|
char *fpname;
|
|
int pos, i, j, bit, len;
|
|
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, -vv\n");
|
|
fprintf(stderr, " -r, --raw\n");
|
|
fprintf(stderr, " -i, --invert\n");
|
|
fprintf(stderr, " --ecc (Hamming ECC)\n");
|
|
fprintf(stderr, " --avg (moving average)\n");
|
|
fprintf(stderr, " -b (alt. Demod.)\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, "-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, "--avg") == 0) ) {
|
|
option_avg = 1;
|
|
}
|
|
else if (strcmp(*argv, "-b" ) == 0) { option_b = 1; }
|
|
else if (strcmp(*argv, "-b2") == 0) { option_b = 2; }
|
|
else if (strcmp(*argv, "-b3") == 0) { option_b = 3; }
|
|
else if ( (strcmp(*argv, "--ecc") == 0) ) {
|
|
option_ecc = 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;
|
|
}
|
|
|
|
if (option_b > 2) {
|
|
wc = (float*)calloc( 2*(int)(samples_per_bit+1), sizeof(float));
|
|
for (i = 0; i < 2*samples_per_bit; i++) wc[i] = (i < samples_per_bit) ? 1 : -1; // wie -b2
|
|
//for (i = 0; i < 2*samples_per_bit; i++) wc[i] = sin(2*M_PI*i/(2*samples_per_bit));
|
|
//for (i = 0; i < 2*samples_per_bit; i++) wc[i] = cos(M_PI*i/(2*samples_per_bit));
|
|
}
|
|
|
|
|
|
for (i = 0; i < 9; i++) {
|
|
for (j = 0; j < 13; j++) dat_str[i][j] = ' ';
|
|
}
|
|
|
|
|
|
pos = FRAMESTART;
|
|
|
|
while (!read_bits_fsk(fp, &bit, &len)) {
|
|
|
|
if (len == 0) { // reset_frame();
|
|
if (pos > RAWBITFRAME_LEN-10) { // Problem wegen Interleaving
|
|
print_frame();//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) option_inv ^= 0x1;
|
|
|
|
}
|
|
else {
|
|
frame_rawbits[pos] = 0x30 + bit; // Ascii
|
|
pos++;
|
|
|
|
if (pos == RAWBITFRAME_LEN) {
|
|
frame_rawbits[pos] = '\0';
|
|
print_frame();//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();//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++;
|
|
}
|
|
|
|
manchester1(frame_rawbits, frame_bits, pos);
|
|
pos /= 2;
|
|
|
|
while ( pos < BITFRAME_LEN ) {
|
|
if (option_b==2) { if (read_rawbit2(fp, &bit) == EOF) break; }
|
|
else { if (read_rawbit3(fp, &bit) == EOF) break; }
|
|
frame_bits[pos] = 0x30 + bit;
|
|
pos++;
|
|
}
|
|
frame_bits[pos] = '\0';
|
|
print_frame();//FRAME_LEN
|
|
|
|
header_found = 0;
|
|
pos = FRAMESTART;
|
|
}
|
|
}
|
|
|
|
if (option_b > 2) {
|
|
if (wc) free(wc); wc = NULL;
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|