mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/* Round hook.
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*
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* Author: Manuel Pitz <manuel.pitz@eonerc.rwth-aachen.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <villas/hook.hpp>
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#include <villas/sample.hpp>
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namespace villas {
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namespace node {
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class RoundHook : public MultiSignalHook {
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protected:
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unsigned precision;
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public:
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RoundHook(Path *p, Node *n, int fl, int prio, bool en = true)
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: MultiSignalHook(p, n, fl, prio, en), precision(1) {}
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virtual void parse(json_t *json) {
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int ret;
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json_error_t err;
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assert(state != State::STARTED);
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MultiSignalHook::parse(json);
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ret = json_unpack_ex(json, &err, 0, "{ s?: i}", "precision", &precision);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-round");
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state = State::PARSED;
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}
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virtual Hook::Reason process(struct Sample *smp) {
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for (auto index : signalIndices) {
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assert(index < smp->length);
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assert(state == State::STARTED);
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switch (sample_format(smp, index)) {
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case SignalType::FLOAT:
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smp->data[index].f =
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round(smp->data[index].f * pow(10, precision)) / pow(10, precision);
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break;
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case SignalType::COMPLEX:
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smp->data[index].z = std::complex<float>(
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round(smp->data[index].z.real() * pow(10, precision)) /
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pow(10, precision),
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round(smp->data[index].z.imag() * pow(10, precision)) /
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pow(10, precision));
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break;
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default: {
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}
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}
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}
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return Reason::OK;
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}
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};
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// Register hook
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static char n[] = "round";
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static char d[] = "Round signals to a set number of digits";
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static HookPlugin<RoundHook, n, d,
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(int)Hook::Flags::PATH | (int)Hook::Flags::NODE_READ |
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(int)Hook::Flags::NODE_WRITE>
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p;
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} // namespace node
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} // namespace villas
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