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Code Issues Releases Wiki Activity

pass timestamp when message was received to hook callbacks

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This commit is contained in:
Steffen Vogel 2015-06-05 12:39:40 +02:00
parent 219278b31f
commit b42dd7a466
2 changed files with 17 additions and 14 deletions
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19
server/include/hooks.h
View file

@ -19,6 +19,8 @@
#ifndef _HOOKS_H_
#define _HOOKS_H_
#include <time.h>
/* The configuration of hook parameters is done in "config.h" */
struct msg;
@ -28,10 +30,11 @@ struct path;
*
* @param m The last message which has been received
* @param p The path which is processing this message.
* @param ts The timestamp when the message(s) were received.
* @retval 0 Success. Continue processing and forwarding the message.
* @retval <0 Error. Drop the message.
*/
typedef int (*hook_cb_t)(struct msg *m, struct path *p);
typedef int (*hook_cb_t)(struct msg *m, struct path *p, struct timespec *ts);
/** This is a static list of available hooks.
*
@ -52,21 +55,21 @@ struct hook_id {
hook_cb_t hook_lookup(const char *name);
/** Example hook: Print the message. */
int hook_print(struct msg *m, struct path *p);
int hook_print(struct msg *m, struct path *p, struct timespec *ts);
/** Example hook: Drop messages. */
int hook_decimate(struct msg *m, struct path *p);
int hook_decimate(struct msg *m, struct path *p, struct timespec *ts);
/** Example hook: Convert the message values to fixed precision. */
int hook_tofixed(struct msg *m, struct path *p);
int hook_tofixed(struct msg *m, struct path *p, struct timespec *ts);
/** Example hook: add timestamp to message. */
int hook_ts(struct msg *m, struct path *p);
/** Example hook: overwrite timestamp of message. */
int hook_ts(struct msg *m, struct path *p, struct timespec *ts);
/** Example hook: Finite-Impulse-Response (FIR) filter. */
int hook_fir(struct msg *m, struct path *p);
int hook_fir(struct msg *m, struct path *p, struct timespec *ts);
/** Example hook: Discrete Fourier Transform */
int hook_dft(struct msg *m, struct path *p);
int hook_dft(struct msg *m, struct path *p, struct timespec *ts);
#endif /** _HOOKS_H_ @} */

12
server/src/hooks.c
View file

@ -48,7 +48,7 @@ hook_cb_t hook_lookup(const char *name)
return NULL; /* No matching hook was found */
}
int hook_print(struct msg *m, struct path *p)
int hook_print(struct msg *m, struct path *p, struct timespec *ts)
{
/* Print every message once to stdout */
msg_fprint(stdout, m);
@ -56,7 +56,7 @@ int hook_print(struct msg *m, struct path *p)
return 0;
}
int hook_tofixed(struct msg *m, struct path *p)
int hook_tofixed(struct msg *m, struct path *p, struct timespec *ts)
{
for (int i=0; i<m->length; i++) {
m->data[i].i = m->data[i].f * 1e3;
@ -65,7 +65,7 @@ int hook_tofixed(struct msg *m, struct path *p)
return 0;
}
int hook_ts(struct msg *m, struct path *p)
int hook_ts(struct msg *m, struct path *p, struct timespec *ts)
{
struct timespec *ts = (struct timespec *) &m->data[HOOK_TS_INDEX];
@ -74,7 +74,7 @@ int hook_ts(struct msg *m, struct path *p)
return 0;
}
int hook_fir(struct msg *m, struct path *p)
int hook_fir(struct msg *m, struct path *p, struct timespec *ts)
{
/** Simple FIR-LP: F_s = 1kHz, F_pass = 100 Hz, F_block = 300
* Tip: Use MATLAB's filter design tool and export coefficients
@ -102,14 +102,14 @@ int hook_fir(struct msg *m, struct path *p)
return 0;
}
int hook_decimate(struct msg *m, struct path *p)
int hook_decimate(struct msg *m, struct path *p, struct timespec *ts)
{
/* Only sent every HOOK_DECIMATE_RATIO'th message */
return m->sequence % HOOK_DECIMATE_RATIO;
}
/** @todo Implement */
int hook_dft(struct msg *m, struct path *p)
int hook_dft(struct msg *m, struct path *p, struct timespec *ts)
{
return 0;
}