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WIP on new faup1090 output, data aging, refactoring

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This commit is contained in:
Oliver Jowett 2017-12-02 17:38:33 +00:00
parent a3cdd47d80
commit 6986b3847f
13 changed files with 335 additions and 455 deletions
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39
track.h
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@ -64,11 +64,18 @@
*/
#define TRACK_MODEAC_MIN_MESSAGES 4
// data moves through three states:
// fresh: data is valid. Updates from a less reliable source are not accepted.
// stale: data is valid. Updates from a less reliable source are accepted.
// expired: data is not valid.
typedef struct {
uint64_t stale_interval; /* how long after an update until the data is stale */
uint64_t expire_interval; /* how long after an update until the data expires */
datasource_t source; /* where the data came from */
uint64_t updated; /* when it arrived */
uint64_t stale; /* when it will become stale */
uint64_t expires; /* when it will expire */
uint64_t updated; /* when it arrived */
uint64_t stale; /* when it goes stale */
uint64_t expires; /* when it expires */
} data_validity;
/* Structure used to describe the state of one tracked aircraft */
@ -213,33 +220,17 @@ extern uint32_t modeAC_age[4096];
/* is this bit of data valid? */
static inline int trackDataValid(const data_validity *v)
{
return (v->source != SOURCE_INVALID);
return (v->source != SOURCE_INVALID && messageNow() < v->expires);
}
/* .. with these constraints? */
static inline int trackDataValidEx(const data_validity *v,
uint64_t now,
uint64_t maxAge,
datasource_t minSource)
{
if (v->source == SOURCE_INVALID)
return 0;
if (v->source < minSource)
return 0;
if (v->updated < now && (now - v->updated) > maxAge)
return 0;
return 1;
}
/* what's the age of this data? */
static inline uint64_t trackDataAge(const data_validity *v,
uint64_t now)
/* what's the age of this data, in milliseconds? */
static inline uint64_t trackDataAge(const data_validity *v)
{
if (v->source == SOURCE_INVALID)
return ~(uint64_t)0;
if (v->updated >= now)
if (v->updated >= messageNow())
return 0;
return (now - v->updated);
return (messageNow() - v->updated);
}
/* Update aircraft state from data in the provided mesage.