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https://git.rwth-aachen.de/acs/public/villas/node/
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89 lines
2 KiB
C++
89 lines
2 KiB
C++
/* Shift timestamps 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 <cstring>
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#include <villas/hook.hpp>
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#include <villas/sample.hpp>
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#include <villas/timing.hpp>
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namespace villas {
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namespace node {
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class ShiftTimestampHook : public Hook {
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protected:
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timespec offset;
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enum { SHIFT_ORIGIN, SHIFT_RECEIVED } mode;
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public:
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ShiftTimestampHook(Path *p, Node *n, int fl, int prio, bool en = true)
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: Hook(p, n, fl, prio, en), mode(SHIFT_ORIGIN) {}
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virtual void parse(json_t *json) {
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double o;
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const char *m = nullptr;
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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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Hook::parse(json);
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ret = json_unpack_ex(json, &err, 0, "{ s?: s, s: F }", "mode", &m, "offset",
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&o);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-shift_ts");
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if (m) {
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if (!strcmp(m, "origin"))
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mode = SHIFT_ORIGIN;
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else if (!strcmp(m, "received"))
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mode = SHIFT_RECEIVED;
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else
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throw ConfigError(json, "node-config-hook-shift_ts-mode",
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"Invalid mode parameter '{}'", m);
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}
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offset = time_from_double(o);
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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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timespec *ts;
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assert(state == State::STARTED);
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switch (mode) {
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case SHIFT_ORIGIN:
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ts = &smp->ts.origin;
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break;
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case SHIFT_RECEIVED:
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ts = &smp->ts.received;
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break;
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default:
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return Hook::Reason::ERROR;
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}
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*ts = time_add(ts, &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_ts";
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static char d[] = "Shift timestamps of samples";
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static HookPlugin<ShiftTimestampHook, 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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