mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/** Scale hook.
|
|
*
|
|
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
|
|
* @copyright 2014-2020, 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 <cstring>
|
|
|
|
#include <villas/hook.hpp>
|
|
#include <villas/sample.h>
|
|
|
|
namespace villas {
|
|
namespace node {
|
|
|
|
class ScaleHook : public MultiSignalHook {
|
|
|
|
protected:
|
|
double scale;
|
|
double offset;
|
|
|
|
public:
|
|
ScaleHook(struct vpath *p, struct vnode *n, int fl, int prio, bool en = true) :
|
|
MultiSignalHook(p, n, fl, prio, en),
|
|
scale(1.0),
|
|
offset(0.0)
|
|
{ }
|
|
|
|
virtual void parse(json_t *json)
|
|
{
|
|
int ret;
|
|
json_error_t err;
|
|
|
|
assert(state != State::STARTED);
|
|
|
|
MultiSignalHook::parse(json);
|
|
|
|
ret = json_unpack_ex(json, &err, 0, "{ s?: F, s?: F }",
|
|
"scale", &scale,
|
|
"offset", &offset
|
|
);
|
|
if (ret)
|
|
throw ConfigError(json, err, "node-config-hook-scale");
|
|
|
|
state = State::PARSED;
|
|
}
|
|
|
|
virtual Hook::Reason process(struct sample *smp)
|
|
{
|
|
for (auto index : signalIndices) {
|
|
assert(index < smp->length);
|
|
assert(state == State::STARTED);
|
|
|
|
switch (sample_format(smp, index)) {
|
|
case SignalType::INTEGER:
|
|
smp->data[index].i *= scale;
|
|
smp->data[index].i += offset;
|
|
break;
|
|
|
|
case SignalType::FLOAT:
|
|
smp->data[index].f *= scale;
|
|
smp->data[index].f += offset;
|
|
break;
|
|
|
|
case SignalType::COMPLEX:
|
|
smp->data[index].z *= scale;
|
|
smp->data[index].z += offset;
|
|
break;
|
|
|
|
default: { }
|
|
}
|
|
}
|
|
|
|
return Reason::OK;
|
|
}
|
|
};
|
|
|
|
/* Register hook */
|
|
static char n[] = "scale";
|
|
static char d[] = "Scale signals by a factor and add offset";
|
|
static HookPlugin<ScaleHook, n, d, (int) Hook::Flags::PATH | (int) Hook::Flags::NODE_READ | (int) Hook::Flags::NODE_WRITE> p;
|
|
|
|
} /* namespace node */
|
|
} /* namespace villas */
|
|
|
|
/** @} */
|