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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dump1090.c
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@ -1,20 +1,20 @@
/* 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>
*
* All rights reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@ -1456,6 +1456,17 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) {
{mm->crcok = (mm->iid == 0);}
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);
if ((mm->errorbit == -1) && (Modes.aggressive)) {
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);
// Decode the received message and update statistics
// Decode the received message
decodeModeAMessage(ModeA, &mm);
// Pass data to the next layer
useModesMessage(&mm);
j += MODEAC_MSG_SAMPLES;
Modes.stat_ModeAC++;
continue;
@ -2127,7 +2139,8 @@ void useModesMessage(struct modesMessage *mm) {
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) {
displayModesMessage(mm);
if (!Modes.raw && !Modes.onlyaddr) printf("\n");