125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
|
|
* bufsize.c -- change JACK buffer size.
|
|
*
|
|
* Copyright (C) 2003 Jack O'Quin.
|
|
*
|
|
* 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 <string.h>
|
|
#include <jack/jack.h>
|
|
#include <jack/transport.h>
|
|
|
|
char *package; /* program name */
|
|
jack_client_t *client;
|
|
jack_nframes_t nframes;
|
|
int just_print_bufsize=0;
|
|
|
|
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);
|
|
}
|
|
|
|
void parse_arguments(int argc, char *argv[])
|
|
{
|
|
/* basename $0 */
|
|
package = strrchr(argv[0], '/');
|
|
if (package == 0)
|
|
package = argv[0];
|
|
else
|
|
package++;
|
|
|
|
if (argc==1) {
|
|
just_print_bufsize = 1;
|
|
return;
|
|
}
|
|
if (argc < 2) {
|
|
fprintf(stderr, "usage: %s <bufsize>\n", package);
|
|
exit(9);
|
|
}
|
|
|
|
if (strspn (argv[1], "0123456789") != strlen (argv[1])) {
|
|
fprintf(stderr, "usage: %s <bufsize>\n", package);
|
|
exit(8);
|
|
}
|
|
|
|
nframes = strtoul(argv[1], NULL, 0);
|
|
if (errno == ERANGE) {
|
|
fprintf(stderr, "%s: invalid buffer size: %s (range is 1-16384)\n",
|
|
package, argv[1]);
|
|
exit(2);
|
|
}
|
|
if (nframes < 1 || nframes > 16384) {
|
|
fprintf(stderr, "%s: invalid buffer size: %s (range is 1-16384)\n",
|
|
package, argv[1]);
|
|
exit(3);
|
|
}
|
|
}
|
|
|
|
void silent_function( const char *ignore )
|
|
{
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int rc;
|
|
parse_arguments(argc, argv);
|
|
|
|
if (just_print_bufsize)
|
|
jack_set_info_function( silent_function );
|
|
|
|
/* become a JACK client */
|
|
if ((client = jack_client_open(package, JackNoStartServer, NULL)) == 0) {
|
|
fprintf(stderr, "JACK server not running?\n");
|
|
exit(1);
|
|
}
|
|
|
|
#ifndef WIN32
|
|
signal(SIGQUIT, signal_handler);
|
|
signal(SIGHUP, signal_handler);
|
|
#endif
|
|
signal(SIGTERM, signal_handler);
|
|
signal(SIGINT, signal_handler);
|
|
|
|
jack_on_shutdown(client, jack_shutdown, 0);
|
|
|
|
if (just_print_bufsize) {
|
|
fprintf(stdout, "%d\n", jack_get_buffer_size( client ) );
|
|
rc = 0;
|
|
}
|
|
else
|
|
{
|
|
rc = jack_set_buffer_size(client, nframes);
|
|
if (rc)
|
|
fprintf(stderr, "jack_set_buffer_size(): %s\n", strerror(rc));
|
|
}
|
|
jack_client_close(client);
|
|
|
|
return rc;
|
|
}
|