mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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116 lines
2.6 KiB
C++
116 lines
2.6 KiB
C++
/** Shift timestamps of samples.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/** @addtogroup hooks Hook functions
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* @{
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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.h>
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#include <villas/sample.h>
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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(struct vpath *p, struct vnode *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(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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/** @} */
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