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hook: added new averaging hook

This commit is contained in:
Steffen Vogel 2019-01-21 22:04:04 +01:00
parent 06caa9c16e
commit 6ff4c838b4
2 changed files with 109 additions and 0 deletions

View file

@ -34,6 +34,7 @@ set(HOOK_SRC
scale.c
fix.c
cast.c
average.c
)
if(WITH_IO)

108
lib/hooks/average.c Normal file
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@ -0,0 +1,108 @@
/** Average hook.
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2014-2019, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
/** @addtogroup hooks Hook functions
* @{
*/
#include <string.h>
#include <villas/hook.h>
#include <villas/plugin.h>
#include <villas/sample.h>
struct average {
int mask;
int offset;
};
static int average_parse(struct hook *h, json_t *cfg)
{
struct average *p = (struct average *) h->_vd;
int ret;
json_error_t err;
ret = json_unpack_ex(cfg, &err, 0, "{ s: i, s: i }",
"offset", &p->offset,
"mask", &p->mask
);
if (ret)
jerror(&err, "Failed to parse configuration of hook '%s'", hook_type_name(h->_vt));
return 0;
}
static int average_process(struct hook *h, struct sample *smps[], unsigned *cnt)
{
struct average *p = (struct average *) h->_vd;
for (int i = 0; i < *cnt; i++) {
struct sample *smp = smps[i];
double sum = 0;
int n = 0;
for (int k = 0; k < smp->length; k++) {
if (!(p->mask & (1 << k)))
continue;
switch (sample_format(smps[i], k)) {
case SIGNAL_TYPE_INTEGER:
sum += smp->data[k].i;
break;
case SIGNAL_TYPE_FLOAT:
sum += smp->data[k].f;
break;
case SIGNAL_TYPE_AUTO:
case SIGNAL_TYPE_INVALID:
case SIGNAL_TYPE_COMPLEX:
case SIGNAL_TYPE_BOOLEAN:
return -1; /* not supported */
}
n++;
}
smp->data[p->offset].f = sum / n;
}
return 0;
}
static struct plugin p = {
.name = "average",
.description = "Calculate average over some signals",
.type = PLUGIN_TYPE_HOOK,
.hook = {
.flags = HOOK_PATH | HOOK_NODE_READ | HOOK_NODE_WRITE,
.priority = 99,
.parse = average_parse,
.process = average_process,
.size = sizeof(struct average)
}
};
REGISTER_PLUGIN(&p)
/** @} */