OVMS3/OVMS.V3/components/retools/tools/crtdreplay.c

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/**
* Project: Open Vehicle Monitor System
* Module: RE tools
*
* crtdreplay: CRTD CAN dump format timing replay filter
*
* Note: this filter is meant to replay a CRTD recording into RE tools serve mode
* with about the same timing as recorded. The filter does not make any attempt at
* recreating the exact timing.
*
* Usage example:
* OVMS# re start
* OVMS# re serve format crtd
* OVMS# re serve mode simulate
* <user@pc> cat some.crtd | crtdreplay | nc ovms.local 3000
*
* Delay between records is limited by default to max 1 second.
* Overwrite with 'crtdreplay <seconds>', e.g. 'crtdreplay 0.5'.
*
* Build: gcc crtdreplay.c -o crtdreplay
*
* (c) 2019 Michael Balzer <dexter@dexters-web.de>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
int main(int argc, char *argv[])
{
char buf[1000];
double ref = 0, ts;
struct timespec slp;
double maxsleep = 1;
if (argc >= 2) {
if (!isdigit(argv[1][0])) {
fprintf(stderr,
"%s: CRTD CAN dump format timing replay filter\n"
"Usage: cat some.crtd | crtdreplay | nc ovms.local 3000\n"
"Delay between records is limited by default to max 1 second.\n"
"Overwrite with 'crtdreplay <seconds>', e.g. 'crtdreplay 0.5'.\n",
argv[0]);
exit(1);
}
maxsleep = atof(argv[1]);
fprintf(stderr, "maxsleep=%lf\n", maxsleep);
}
while (fgets(buf, sizeof buf, stdin)) {
sscanf(buf, "%lf", &ts);
if (ref) {
double diff = ts - ref;
if (diff > maxsleep) diff = maxsleep;
slp.tv_sec = (time_t) diff;
slp.tv_nsec = (diff - slp.tv_sec) * 1e9;
nanosleep(&slp, NULL);
}
ref = ts;
fputs(buf, stdout);
}
}