mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
/** Convert hook.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017, 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 <string.h>
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#include <villas/hook.h>
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#include <villas/plugin.h>
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#include <villas/sample.h>
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struct convert {
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enum {
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TO_FIXED,
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TO_FLOAT
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} mode;
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double scale;
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long long mask;
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};
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static int convert_init(struct hook *h)
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{
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struct convert *p = (struct convert *) h->_vd;
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p->scale = 1;
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p->mask = -1;
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return 0;
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}
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static int convert_parse(struct hook *h, json_t *cfg)
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{
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struct convert *p = (struct convert *) h->_vd;
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int ret;
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json_error_t err;
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const char *mode = NULL;
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ret = json_unpack_ex(cfg, &err, 0, "{ s?: F, s?: i, s: s }",
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"scale", &p->scale,
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"mask", &p->mask,
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"mode", &mode
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);
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if (ret)
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jerror(&err, "Failed to parse configuration of hook '%s'", plugin_name(h->_vt));
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if (!strcmp(mode, "fixed"))
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p->mode = TO_FIXED;
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else if (!strcmp(mode, "float"))
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p->mode = TO_FLOAT;
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else
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error("Invalid 'mode' setting '%s' for hook '%s'", mode, plugin_name(h->_vt));
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return 0;
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}
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static int convert_read(struct hook *h, struct sample *smps[], unsigned *cnt)
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{
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struct convert *p = (struct convert *) h->_vd;
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for (int i = 0; i < *cnt; i++) {
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for (int k = 0; k < smps[i]->length; k++) {
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/* Only convert values which are not masked */
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if ((k < sizeof(p->mask) * 8) && !(p->mask & (1LL << k)))
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continue;
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switch (p->mode) {
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case TO_FIXED:
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smps[i]->data[k].i = smps[i]->data[k].f * p->scale;
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sample_set_data_format(smps[i], k, SAMPLE_DATA_FORMAT_INT);
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break;
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case TO_FLOAT:
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smps[i]->data[k].f = smps[i]->data[k].i * p->scale;
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sample_set_data_format(smps[i], k, SAMPLE_DATA_FORMAT_FLOAT);
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break;
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}
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}
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}
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return 0;
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}
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static struct plugin p = {
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.name = "convert",
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.description = "Convert message from / to floating-point / integer",
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.type = PLUGIN_TYPE_HOOK,
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.hook = {
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.flags = HOOK_PATH | HOOK_NODE,
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.priority = 99,
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.init = convert_init,
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.parse = convert_parse,
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.read = convert_read,
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.size = sizeof(struct convert)
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}
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};
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REGISTER_PLUGIN(&p)
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/** @} */
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