mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
/** Decimate hook.
|
|
*
|
|
* @author Steffen Vogel <post@steffenvogel.de>
|
|
* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
|
|
* @license Apache 2.0
|
|
*********************************************************************************/
|
|
|
|
#include <villas/hooks/decimate.hpp>
|
|
#include <villas/sample.hpp>
|
|
|
|
namespace villas {
|
|
namespace node {
|
|
|
|
void DecimateHook::start()
|
|
{
|
|
assert(state == State::PREPARED);
|
|
|
|
counter = 0;
|
|
|
|
state = State::STARTED;
|
|
}
|
|
|
|
void DecimateHook::parse(json_t *json)
|
|
{
|
|
int ret;
|
|
json_error_t err;
|
|
|
|
assert(state != State::STARTED);
|
|
|
|
Hook::parse(json);
|
|
|
|
ret = json_unpack_ex(json, &err, 0, "{ s: i, s?: b }",
|
|
"ratio", &ratio,
|
|
"renumber", &renumber
|
|
);
|
|
if (ret)
|
|
throw ConfigError(json, err, "node-config-hook-decimate");
|
|
|
|
state = State::PARSED;
|
|
}
|
|
|
|
Hook::Reason DecimateHook::process(struct Sample *smp)
|
|
{
|
|
assert(state == State::STARTED);
|
|
|
|
if (renumber)
|
|
smp->sequence /= ratio;
|
|
|
|
if (ratio && counter++ % ratio != 0)
|
|
return Hook::Reason::SKIP_SAMPLE;
|
|
|
|
return Reason::OK;
|
|
}
|
|
|
|
/* Register hook */
|
|
static char n[] = "decimate";
|
|
static char d[] = "Downsamping by integer factor";
|
|
static HookPlugin<DecimateHook, n, d, (int) Hook::Flags::NODE_READ | (int) Hook::Flags::NODE_WRITE | (int) Hook::Flags::PATH> p;
|
|
|
|
} /* namespace node */
|
|
} /* namespace villas */
|