mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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95 lines
1.9 KiB
C++
95 lines
1.9 KiB
C++
/** Shift timestamps of samples.
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*
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* @author Steffen Vogel <post@steffenvogel.de>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @license 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/timing.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 ShiftTimestampHook : public Hook {
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protected:
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timespec offset;
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enum {
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SHIFT_ORIGIN,
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SHIFT_RECEIVED
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} 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),
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mode(SHIFT_ORIGIN)
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{ }
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virtual void parse(json_t *json)
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{
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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 }",
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"mode", &m,
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"offset", &o
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);
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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", "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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{
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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, (int) Hook::Flags::NODE_READ | (int) Hook::Flags::PATH> p;
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} /* namespace node */
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} /* namespace villas */
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