AFG/dump1090
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Malcolm Robb 2013-04-23 22:18:15 +01:00
parent 9fff65ba58
commit d63ac81a6a
1 changed files with 19 additions and 6 deletions
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19
dump1090.c
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@ -1,4 +1,4 @@
/* Mode1090, a Mode S messages decoder for RTLSDR devices. /* dump1090, a Mode S messages decoder for RTLSDR devices.
* *
* Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com> * Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
* *
@ -1456,6 +1456,17 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) {
{mm->crcok = (mm->iid == 0);} {mm->crcok = (mm->iid == 0);}
if (!mm->crcok && Modes.fix_errors && (mm->msgtype == 17)){ if (!mm->crcok && Modes.fix_errors && (mm->msgtype == 17)){
// if (!mm->crcok && Modes.fix_errors && ((mm->msgtype == 11) || (mm->msgtype == 17))){
//
// Fixing single bit errors in DF-11 is a bit dodgy because we have no way to
// know for sure if the crc is supposed to be 0 or not - it could be any value
// less than 80. Therefore, attempting to fix DF-11 errors can result in a
// multitude of possible crc solutions, only one of which is correct.
//
// We should probably perform some sanity checks on corrected DF-11's before
// using the results. Perhaps check the ICAO against known aircraft, and check
// IID against known good IID's. That's a TODO.
//
mm->errorbit = fixSingleBitErrors(msg, mm->msgbits, mm); mm->errorbit = fixSingleBitErrors(msg, mm->msgbits, mm);
if ((mm->errorbit == -1) && (Modes.aggressive)) { if ((mm->errorbit == -1) && (Modes.aggressive)) {
mm->errorbit = fixTwoBitsErrors(msg, mm->msgbits, mm); mm->errorbit = fixTwoBitsErrors(msg, mm->msgbits, mm);
@ -1880,11 +1891,12 @@ void detectModeS(uint16_t *m, uint32_t mlen) {
{ {
mm.timestampMsg = Modes.timestampBlk + ((j+1) * 6); mm.timestampMsg = Modes.timestampBlk + ((j+1) * 6);
// Decode the received message and update statistics // Decode the received message
decodeModeAMessage(ModeA, &mm); decodeModeAMessage(ModeA, &mm);
// Pass data to the next layer // Pass data to the next layer
useModesMessage(&mm); useModesMessage(&mm);
j += MODEAC_MSG_SAMPLES; j += MODEAC_MSG_SAMPLES;
Modes.stat_ModeAC++; Modes.stat_ModeAC++;
continue; continue;
@ -2127,7 +2139,8 @@ void useModesMessage(struct modesMessage *mm) {
if (a && Modes.stat_sbs_connections > 0) modesSendSBSOutput(mm, a); // Feed SBS output clients if (a && Modes.stat_sbs_connections > 0) modesSendSBSOutput(mm, a); // Feed SBS output clients
} }
// In non-interactive mode, display messages on standard output // In non-interactive mode, and non-quiet mode, display messages on
// standard output as they occur.
if (!Modes.interactive && !Modes.quiet) { if (!Modes.interactive && !Modes.quiet) {
displayModesMessage(mm); displayModesMessage(mm);
if (!Modes.raw && !Modes.onlyaddr) printf("\n"); if (!Modes.raw && !Modes.onlyaddr) printf("\n");