AFG/dump1090
3
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Store computed reception time in the message struct so we don't rely on

Browse source 
the message being emitted immediately.

Fix computation of reception time so it's more sensible (the block timestamp
is some time after reception of the _end_ of the block, not the start) - this
means that message-emission times are always later than message-reception
times in SBS output, which is a bit more sensible.

Use clock_gettime in preference to ftime.
This commit is contained in:
Oliver Jowett 2015-02-08 17:46:01 +00:00
parent 1584955080
commit 4e177c2d64
7 changed files with 76 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

8
dump1090.h
View file

@ -71,7 +71,6 @@
#include <unistd.h>
#include <math.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
@ -248,7 +247,7 @@ struct { // Internal state
pthread_mutex_t data_mutex; // Mutex to synchronize buffer access
pthread_cond_t data_cond; // Conditional variable associated
uint16_t *pData [MODES_ASYNC_BUF_NUMBER]; // Raw IQ sample buffers from RTL
struct timeb stSystemTimeRTL[MODES_ASYNC_BUF_NUMBER]; // System time when RTL passed us this block
struct timespec stSystemTimeRTL[MODES_ASYNC_BUF_NUMBER]; // System time when RTL passed us this block
int iDataIn; // Fifo input pointer
int iDataOut; // Fifo output pointer
int iDataReady; // Fifo content count
@ -260,7 +259,7 @@ struct { // Internal state
uint16_t *pFileData; // Raw IQ samples buffer (from a File)
uint16_t *magnitude; // Magnitude vector
uint64_t timestampBlk; // Timestamp of the start of the current block
struct timeb stSystemTimeBlk; // System time when RTL passed us currently processing this block
struct timespec stSystemTimeBlk; // System time when RTL passed us currently processing this block
int fd; // --ifile option file descriptor
uint16_t *maglut; // I/Q -> Magnitude lookup table
uint16_t *log10lut; // Magnitude -> log10 lookup table
@ -367,7 +366,8 @@ struct modesMessage {
uint32_t crc; // Message CRC
int correctedbits; // No. of bits corrected
uint32_t addr; // Address Announced
uint64_t timestampMsg; // Timestamp of the message
uint64_t timestampMsg; // Timestamp of the message (12MHz clock)
struct timespec sysTimestampMsg; // Timestamp of the message (system time)
int remote; // If set this message is from a remote station
double signalLevel; // RSSI, in the range [0..1], as a fraction of full-scale power
int score; // Scoring from scoreModesMessage, if used