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reuse code between villas-signal and signal node-type

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This commit is contained in:
Steffen Vogel 2017-07-06 23:14:38 +02:00
parent 007ff9a776
commit 542631ed5b
3 changed files with 155 additions and 175 deletions
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23
include/villas/nodes/signal.h
View file

@ -37,20 +37,23 @@
struct node;
struct sample;
enum signal_type {
SIGNAL_TYPE_RANDOM,
SIGNAL_TYPE_SINE,
SIGNAL_TYPE_SQUARE,
SIGNAL_TYPE_TRIANGLE,
SIGNAL_TYPE_RAMP,
SIGNAL_TYPE_MIXED
};
/** Node-type for signal generation.
* @see node_type
*/
struct signal {
int tfd; /**< timerfd file descriptor. */
int rt; /**< Real-time mode? */
enum {
TYPE_RANDOM,
TYPE_SINE,
TYPE_SQUARE,
TYPE_TRIANGLE,
TYPE_RAMP,
TYPE_MIXED
} type; /**< Signal type */
enum signal_type type; /**< Signal type */
double rate; /**< Sampling rate. */
double frequency; /**< Frequency of the generated signals. */
@ -79,4 +82,8 @@ int signal_close(struct node *n);
/** @see node_type::read */
int signal_read(struct node *n, struct sample *smps[], unsigned cnt);
enum signal_type signal_lookup_type(const char *type);
void signal_get(struct signal *s, struct sample *t, struct timespec *now);
/** @} */

138
lib/nodes/signal.c
View file

@ -22,55 +22,63 @@
*********************************************************************************/
#include <math.h>
#include <inttypes.h>
#include "node.h"
#include "plugin.h"
#include "nodes/signal.h"
enum signal_type signal_lookup_type(const char *type)
{
if (!strcmp(type, "random"))
return SIGNAL_TYPE_RANDOM;
else if (!strcmp(type, "sine"))
return SIGNAL_TYPE_SINE;
else if (!strcmp(type, "square"))
return SIGNAL_TYPE_SQUARE;
else if (!strcmp(type, "triangle"))
return SIGNAL_TYPE_TRIANGLE;
else if (!strcmp(type, "ramp"))
return SIGNAL_TYPE_RAMP;
else if (!strcmp(type, "mixed"))
return SIGNAL_TYPE_MIXED;
else
return -1;
}
int signal_parse(struct node *n, config_setting_t *cfg)
{
struct signal *s = n->_vd;
const char *type;
if (!config_setting_lookup_string(cfg, "signal", &type))
s->type = TYPE_MIXED;
s->type = SIGNAL_TYPE_MIXED;
else {
if (!strcmp(type, "random"))
s->type = TYPE_RANDOM;
else if (!strcmp(type, "sine"))
s->type = TYPE_SINE;
else if (!strcmp(type, "square"))
s->type = TYPE_SQUARE;
else if (!strcmp(type, "triangle"))
s->type = TYPE_TRIANGLE;
else if (!strcmp(type, "ramp"))
s->type = TYPE_RAMP;
else if (!strcmp(type, "mixed"))
s->type = TYPE_MIXED;
else
cerror(cfg, "Invalid signal type: %s", type);
s->type = signal_lookup_type(type);
if (s->type == -1)
cerror(cfg, "Unknown signal type '%s'", type);
}
if (!config_setting_lookup_bool(cfg, "realtime", &s->rt))
s->rt = 1;
if (!config_setting_lookup_int(cfg, "limit", &s->limit))
s->limit = -1;
if (!config_setting_lookup_int(cfg, "values", &s->values))
s->values = 1;
if (!config_setting_lookup_float(cfg, "rate", &s->rate))
s->rate = 10;
if (!config_setting_lookup_float(cfg, "frequency", &s->frequency))
s->frequency = 1;
if (!config_setting_lookup_float(cfg, "amplitude", &s->amplitude))
s->amplitude = 1;
if (!config_setting_lookup_float(cfg, "stddev", &s->stddev))
s->stddev = 0.02;
return 0;
}
@ -81,8 +89,15 @@ int signal_open(struct node *n)
s->counter = 0;
s->started = time_now();
s->tfd = timerfd_create_rate(s->rate);
/* Setup timer */
if (s->rt) {
s->tfd = timerfd_create_rate(s->rate);
if (s->tfd < 0)
return -1;
}
else
s->tfd = -1;
return 0;
}
@ -99,36 +114,51 @@ int signal_close(struct node *n)
int signal_read(struct node *n, struct sample *smps[], unsigned cnt)
{
struct signal *s = n->_vd;
struct sample *t = smps[0];
struct timespec now;
assert(cnt == 1);
uint64_t steps = timerfd_wait(s->tfd);
if (steps > 1)
warn("Missed steps: %" PRIu64, steps);
struct timespec now = time_now();
/* Throttle output if desired */
if (s->rt) {
/* Block until 1/p->rate seconds elapsed */
int steps = timerfd_wait(s->tfd);
if (steps > 1)
warn("Missed steps: %u", steps);
s->counter += steps;
now = time_now();
}
else {
struct timespec offset = time_from_double(s->counter * 1.0 / s->rate);
now = time_add(&s->started, &offset);
s->counter += 1;
}
double running = time_delta(&s->started, &now);
smps[0]->ts.origin =
smps[0]->ts.received = now;
smps[0]->sequence = s->counter;
smps[0]->length = s->values;
t->ts.origin =
t->ts.received = now;
t->sequence = s->counter;
t->length = s->values;
for (int i = 0; i < MIN(s->values, smps[0]->capacity); i++) {
int rtype = (s->type != TYPE_MIXED) ? s->type : i % 4;
for (int i = 0; i < MIN(s->values, t->capacity); i++) {
int rtype = (s->type != SIGNAL_TYPE_MIXED) ? s->type : i % 4;
switch (rtype) {
case TYPE_RANDOM: smps[0]->data[i].f += box_muller(0, s->stddev); break;
case TYPE_SINE: smps[0]->data[i].f = s->amplitude * sin(running * s->frequency * 2 * M_PI); break;
case TYPE_TRIANGLE: smps[0]->data[i].f = s->amplitude * (fabs(fmod(running * s->frequency, 1) - .5) - 0.25) * 4; break;
case TYPE_SQUARE: smps[0]->data[i].f = s->amplitude * ( (fmod(running * s->frequency, 1) < .5) ? -1 : 1); break;
case TYPE_RAMP: smps[0]->data[i].f = fmod(s->counter, s->rate / s->frequency); /** @todo send as integer? */ break;
case SIGNAL_TYPE_RANDOM: t->data[i].f += box_muller(0, s->stddev); break;
case SIGNAL_TYPE_SINE: t->data[i].f = s->amplitude * sin(running * s->frequency * 2 * M_PI); break;
case SIGNAL_TYPE_TRIANGLE: t->data[i].f = s->amplitude * (fabs(fmod(running * s->frequency, 1) - .5) - 0.25) * 4; break;
case SIGNAL_TYPE_SQUARE: t->data[i].f = s->amplitude * ( (fmod(running * s->frequency, 1) < .5) ? -1 : 1); break;
case SIGNAL_TYPE_RAMP: t->data[i].f = fmod(s->counter, s->rate / s->frequency); /** @todo send as integer? */ break;
}
}
s->counter++;
if (s->limit > 0 && s->counter >= s->limit) {
info("Reached limit of node %s", node_name(n));
info("Reached limit");
killme(SIGTERM);
}
@ -141,12 +171,12 @@ char * signal_print(struct node *n)
char *type, *buf = NULL;
switch (s->type) {
case TYPE_MIXED: type = "mixed"; break;
case TYPE_RAMP: type = "ramp"; break;
case TYPE_TRIANGLE: type = "triangle"; break;
case TYPE_SQUARE: type = "square"; break;
case TYPE_SINE: type = "sine"; break;
case TYPE_RANDOM: type = "random"; break;
case SIGNAL_TYPE_MIXED: type = "mixed"; break;
case SIGNAL_TYPE_RAMP: type = "ramp"; break;
case SIGNAL_TYPE_TRIANGLE: type = "triangle"; break;
case SIGNAL_TYPE_SQUARE: type = "square"; break;
case SIGNAL_TYPE_SINE: type = "sine"; break;
case SIGNAL_TYPE_RANDOM: type = "random"; break;
default: return NULL;
}
@ -165,12 +195,12 @@ static struct plugin p = {
.type = PLUGIN_TYPE_NODE,
.node = {
.vectorize = 1,
.size = sizeof(struct signal),
.size = sizeof(struct signal),
.parse = signal_parse,
.print = signal_print,
.start = signal_open,
.stop = signal_close,
.read = signal_read,
.stop = signal_close,
.read = signal_read,
}
};

169
src/signal.c
View file

@ -32,18 +32,27 @@
#include <villas/sample.h>
#include <villas/sample_io.h>
#include <villas/timing.h>
#include <villas/node.h>
#include <villas/nodes/signal.h>
#define CLOCKID CLOCK_REALTIME
enum SIGNAL_TYPE {
TYPE_RANDOM,
TYPE_SINE,
TYPE_SQUARE,
TYPE_TRIANGLE,
TYPE_RAMP,
TYPE_MIXED
/* Some default values */
struct signal s = {
.rate = 10,
.frequency = 1,
.amplitude = 1,
.stddev = 0.02,
.type = SIGNAL_TYPE_MIXED,
.rt = 1,
.values = 1,
.limit = -1
};
struct node n = {
._vd = &s
};
struct log l;
void usage()
{
printf("Usage: villas-signal [OPTIONS] SIGNAL\n");
@ -68,26 +77,18 @@ void usage()
print_copyright();
}
static void quit(int signal, siginfo_t *sinfo, void *ctx)
{
signal_close(&n);
info(GRN("Goodbye!"));
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
struct log log;
struct timespec start, now;
enum {
MODE_RT,
MODE_NON_RT
} mode = MODE_RT;
/* Some default values */
double rate = 10;
double freq = 1;
double ampl = 1;
double stddev = 0.02;
double running;
int type = TYPE_MIXED;
int values = 1;
int limit = -1;
int counter, tfd, steps, level = V;
char *type;
int ret, level = V;
/* Parse optional command line arguments */
char c, *endptr;
@ -96,27 +97,27 @@ int main(int argc, char *argv[])
case 'd':
level = strtoul(optarg, &endptr, 10);
goto check;
case 'n':
s.rt = 0;
break;
case 'l':
limit = strtoul(optarg, &endptr, 10);
s.limit = strtoul(optarg, &endptr, 10);
goto check;
case 'v':
values = strtoul(optarg, &endptr, 10);
s.values = strtoul(optarg, &endptr, 10);
goto check;
case 'r':
rate = strtof(optarg, &endptr);
s.rate = strtof(optarg, &endptr);
goto check;
case 'f':
freq = strtof(optarg, &endptr);
s.frequency = strtof(optarg, &endptr);
goto check;
case 'a':
ampl = strtof(optarg, &endptr);
s.amplitude = strtof(optarg, &endptr);
goto check;
case 'D':
stddev = strtof(optarg, &endptr);
s.stddev = strtof(optarg, &endptr);
goto check;
case 'n':
mode = MODE_NON_RT;
break;
case 'h':
case '?':
usage();
@ -133,97 +134,39 @@ check: if (optarg == endptr)
usage();
exit(EXIT_FAILURE);
}
type = argv[optind];
char *typestr = argv[optind];
s.type = signal_lookup_type(type);
if (s.type == -1)
error("Invalid signal type: %s", type);
/* Parse signal type */
if (!strcmp(typestr, "random"))
type = TYPE_RANDOM;
else if (!strcmp(typestr, "sine"))
type = TYPE_SINE;
else if (!strcmp(typestr, "square"))
type = TYPE_SQUARE;
else if (!strcmp(typestr, "triangle"))
type = TYPE_TRIANGLE;
else if (!strcmp(typestr, "ramp"))
type = TYPE_RAMP;
else if (!strcmp(typestr, "mixed"))
type = TYPE_MIXED;
else
error("Invalid signal type: %s", typestr);
log_init(&log, level, LOG_ALL);
log_init(&l, level, LOG_ALL);
signals_init(quit);
info("Starting signal generation: %s", signal_print(&n));
/* Allocate memory for message buffer */
struct sample *s = alloc(SAMPLE_LEN(values));
struct sample *t = alloc(SAMPLE_LEN(s.values));
t->capacity = s.values;
/* Print header */
printf("# VILLASnode signal params: type=%s, values=%u, rate=%f, limit=%d, amplitude=%f, freq=%f\n",
typestr, values, rate, limit, ampl, freq);
argv[optind], s.values, s.rate, s.limit, s.amplitude, s.frequency);
printf("# %-20s\t\t%s\n", "sec.nsec(seq)", "data[]");
/* Setup timer */
if (mode == MODE_RT) {
tfd = timerfd_create_rate(rate);
if (tfd < 0)
serror("Failed to create timer");
}
else
tfd = -1;
ret = signal_open(&n);
if (ret)
serror("Failed to start node");
start = time_now();
for (;;) {
signal_read(&n, &t, 1);
counter = 0;
while (limit < 0 || counter < limit) {
if (mode == MODE_RT) {
now = time_now();
running = time_delta(&start, &now);
}
else {
struct timespec offset;
running = counter * 1.0 / rate;
offset = time_from_double(running);
now = time_add(&start, &offset);
}
s->ts.origin = now;
s->sequence = counter;
s->length = values;
for (int i = 0; i < values; i++) {
int rtype = (type != TYPE_MIXED) ? type : i % 4;
switch (rtype) {
case TYPE_RANDOM: s->data[i].f += box_muller(0, stddev); break;
case TYPE_SINE: s->data[i].f = ampl * sin(running * freq * 2 * M_PI); break;
case TYPE_TRIANGLE: s->data[i].f = ampl * (fabs(fmod(running * freq, 1) - .5) - 0.25) * 4; break;
case TYPE_SQUARE: s->data[i].f = ampl * ( (fmod(running * freq, 1) < .5) ? -1 : 1); break;
case TYPE_RAMP: s->data[i].f = fmod(counter, rate / freq); /** @todo send as integer? */ break;
}
}
sample_io_villas_fprint(stdout, s, SAMPLE_IO_ALL & ~SAMPLE_IO_OFFSET);
sample_io_villas_fprint(stdout, t, SAMPLE_IO_ALL & ~SAMPLE_IO_OFFSET);
fflush(stdout);
/* Throttle output if desired */
if (mode == MODE_RT) {
/* Block until 1/p->rate seconds elapsed */
steps = timerfd_wait(tfd);
if (steps > 1)
warn("Missed steps: %u", steps);
counter += steps;
}
else
counter += 1;
}
if (mode == MODE_RT)
close(tfd);
free(s);
return 0;
}