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/*
* Advanced Linux Sound Architecture Control Program
* Copyright (c) by Takashi Iwai <tiwai@suse.de>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "aconfig.h"
#include "version.h"
#include <stdio.h>
#include <alsa/asoundlib.h>
int monitor(const char *name)
{
snd_ctl_t *ctl;
snd_ctl_event_t *event;
int err;
if (!name)
name = "default";
err = snd_ctl_open(&ctl, name, SND_CTL_READONLY);
if (err < 0) {
fprintf(stderr, "Cannot open ctl %s\n", name);
return err;
}
err = snd_ctl_subscribe_events(ctl, 1);
if (err < 0) {
fprintf(stderr, "Cannot open subscribe events to ctl %s\n", name);
snd_ctl_close(ctl);
return err;
}
snd_ctl_event_alloca(&event);
while (snd_ctl_read(ctl, event) > 0) {
unsigned int mask;
if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM)
continue;
printf("#%d (%i,%i,%i,%s,%i)",
snd_ctl_event_elem_get_numid(event),
snd_ctl_event_elem_get_interface(event),
snd_ctl_event_elem_get_device(event),
snd_ctl_event_elem_get_subdevice(event),
snd_ctl_event_elem_get_name(event),
snd_ctl_event_elem_get_index(event));
mask = snd_ctl_event_elem_get_mask(event);
if (mask == SND_CTL_EVENT_MASK_REMOVE) {
printf(" REMOVE\n");
continue;
}
if (mask & SND_CTL_EVENT_MASK_VALUE)
printf(" VALUE");
if (mask & SND_CTL_EVENT_MASK_INFO)
printf(" INFO");
if (mask & SND_CTL_EVENT_MASK_ADD)
printf(" ADD");
if (mask & SND_CTL_EVENT_MASK_TLV)
printf(" TLV");
printf("\n");
}
snd_ctl_close(ctl);
return 0;
}
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