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https://git.rwth-aachen.de/acs/public/villas/node/
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54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
/* Shift sequence number of samples.
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*
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* Author: Steffen Vogel <post@steffenvogel.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 ShiftSequenceHook : public Hook {
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protected:
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int offset;
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public:
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using Hook::Hook;
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virtual void parse(json_t *json) {
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json_error_t err;
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int ret;
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assert(state != State::STARTED);
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Hook::parse(json);
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ret = json_unpack_ex(json, &err, 0, "{ s: i }", "offset", &offset);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-shift_seq");
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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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assert(state == State::STARTED);
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smp->sequence += offset;
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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[] = "shift_seq";
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static char d[] = "Shift sequence number of samples";
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static HookPlugin<ShiftSequenceHook, n, d,
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(int)Hook::Flags::NODE_READ | (int)Hook::Flags::PATH>
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p;
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} // namespace node
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} // namespace villas
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