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VILLASnode/lib/hooks/scale.cpp
Steffen Vogel 02a2aa4f94 Apply clang-format changes
Signed-off-by: Steffen Vogel <steffen.vogel@opal-rt.com>
2023-09-08 11:37:42 +02:00

81 lines
1.9 KiB
C++

/* Scale hook.
*
* Author: Steffen Vogel <post@steffenvogel.de>
* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
* SPDX-License-Identifier: Apache-2.0
*/
#include <cstring>
#include <villas/hook.hpp>
#include <villas/sample.hpp>
namespace villas {
namespace node {
class ScaleHook : public MultiSignalHook {
protected:
double scale;
double offset;
public:
ScaleHook(Path *p, Node *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