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/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <inttypes.h>
#include <jack/jack.h>
#include <jack/transport.h>
jack_client_t *client;
static void
showtime ()
{
jack_position_t current;
jack_transport_state_t transport_state;
jack_nframes_t frame_time;
transport_state = jack_transport_query (client, ¤t);
frame_time = jack_frame_time (client);
printf ("frame = %u frame_time = %u usecs = %" PRIu64 "\t", current.frame, frame_time, current.usecs);
switch (transport_state) {
case JackTransportStopped:
printf ("state: Stopped");
break;
case JackTransportRolling:
printf ("state: Rolling");
break;
case JackTransportStarting:
printf ("state: Starting");
break;
default:
printf ("state: [unknown]");
}
if (current.valid & JackPositionBBT)
printf ("\tBBT: %3" PRIi32 "|%" PRIi32 "|%04"
PRIi32, current.bar, current.beat, current.tick);
if (current.valid & JackPositionTimecode)
printf ("\tTC: (%.6f, %.6f)",
current.frame_time, current.next_time);
printf ("\n");
}
static void
jack_shutdown (void *arg)
{
fprintf(stderr, "JACK shut down, exiting ...\n");
exit (1);
}
void
signal_handler (int sig)
{
jack_client_close (client);
fprintf (stderr, "signal received, exiting ...\n");
exit (0);
}
int
main (int argc, char *argv[])
{
/* try to become a client of the JACK server */
if ((client = jack_client_open ("showtime", JackNullOption, NULL)) == 0) {
fprintf (stderr, "JACK server not running?\n");
return 1;
}
#ifndef WIN32
signal (SIGQUIT, signal_handler);
signal (SIGHUP, signal_handler);
#endif
signal (SIGTERM, signal_handler);
signal (SIGINT, signal_handler);
/* tell the JACK server to call `jack_shutdown()' if
it ever shuts down, either entirely, or if it
just decides to stop calling us.
*/
jack_on_shutdown (client, jack_shutdown, 0);
/* tell the JACK server that we are ready to roll */
if (jack_activate (client)) {
fprintf (stderr, "cannot activate client");
return 1;
}
while (1) {
usleep (20);
showtime ();
}
jack_client_close (client);
exit (0);
}
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