1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*
** Copyright 2010, The Android Open-Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "alsa_audio.h"
struct mixer_ctl *get_ctl(struct mixer *mixer, char *name)
{
char *p;
unsigned idx = 0;
if (isdigit(name[0]))
return mixer_get_nth_control(mixer, atoi(name) - 1);
p = strrchr(name, '#');
if (p) {
*p++ = 0;
idx = atoi(p);
}
return mixer_get_control(mixer, name, idx);
}
int main(int argc, char **argv)
{
struct mixer *mixer;
struct mixer_ctl *ctl;
int r;
mixer = mixer_open();
if (!mixer)
return -1;
if (argc == 1) {
mixer_dump(mixer);
return 0;
}
ctl = get_ctl(mixer, argv[1]);
argc -= 2;
argv += 2;
if (!ctl) {
fprintf(stderr,"can't find control\n");
return -1;
}
if (argc) {
if (isdigit(argv[0][0]))
r = mixer_ctl_set(ctl, atoi(argv[0]));
else
r = mixer_ctl_select(ctl, argv[0]);
if (r)
fprintf(stderr,"oops: %s\n", strerror(errno));
} else {
mixer_ctl_print(ctl);
}
return 0;
}
|
