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/** @file cpu_load.c
*
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <signal.h>
#ifndef WIN32
#include <unistd.h>
#endif
#include <jack/jack.h>
jack_client_t *client;
static void signal_handler(int sig)
{
jack_client_close(client);
fprintf(stderr, "signal received, exiting ...\n");
exit(0);
}
/**
* JACK calls this shutdown_callback if the server ever shuts down or
* decides to disconnect the client.
*/
void
jack_shutdown(void *arg)
{
exit(1);
}
int
main(int argc, char *argv[])
{
jack_options_t options = JackNullOption;
jack_status_t status;
/* open a client connection to the JACK server */
client = jack_client_open ("jack_cpu_load", options, &status);
if (client == NULL) {
fprintf(stderr, "jack_client_open() failed, "
"status = 0x%2.0x\n", status);
if (status & JackServerFailed) {
fprintf(stderr, "Unable to connect to JACK server\n");
}
exit(1);
}
jack_on_shutdown(client, jack_shutdown, 0);
/* Tell the JACK server that we are ready to roll. Our
* process() callback will start running now. */
if (jack_activate(client)) {
fprintf(stderr, "cannot activate client");
exit(1);
}
/* install a signal handler to properly quits jack client */
#ifdef WIN32
signal(SIGINT, signal_handler);
signal(SIGABRT, signal_handler);
signal(SIGTERM, signal_handler);
#else
signal(SIGQUIT, signal_handler);
signal(SIGTERM, signal_handler);
signal(SIGHUP, signal_handler);
signal(SIGINT, signal_handler);
#endif
while (1) {
printf("jack DSP load %f\n", jack_cpu_load(client));
#ifdef WIN32
Sleep(1000);
#else
sleep(1);
#endif
}
jack_client_close(client);
exit(0 );
}
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