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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* audio-pcm.c - Scope out the PCM audio stuff
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if defined(HAVE_MACHINE_SOUNDCARD_H) || defined(HAVE_SYS_SOUNDCARD_H)
#include "audio.h"
#include "ntp_stdlib.h"
#include "ntp_syslog.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdio.h>
#include "ntp_string.h"
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif /* HAVE_SYS_IOCTL_H */
#include <fcntl.h>
#ifdef HAVE_MACHINE_SOUNDCARD_H
# include <machine/soundcard.h>
# define PCM_STYLE_SOUND
#else
# ifdef HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
# define PCM_STYLE_SOUND
# endif
#endif
/*
* Global variables
*/
static int ctl_fd; /* audio control file descriptor */
const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES ;
void
d_fmt(
unsigned int format
)
{
if (format & AFMT_MU_LAW) printf("MU_LAW ");
if (format & AFMT_A_LAW) printf("A_LAW ");
if (format & AFMT_IMA_ADPCM) printf("IMA_ADPCM ");
if (format & AFMT_U8) printf("U8 ");
if (format & AFMT_S16_LE) printf("S16_LE ");
if (format & AFMT_S16_BE) printf("S16_BE ");
if (format & AFMT_S8) printf("S8 ");
if (format & AFMT_U16_LE) printf("U16_LE ");
if (format & AFMT_U16_BE) printf("U16_BE ");
if (format & AFMT_MPEG) printf("MPEG ");
if (format & AFMT_AC3) printf("AC3 ");
printf("\n");
}
void
d_mixer(
unsigned int mixer
)
{
int i;
int n = 0;
for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
if ((1 << i) & mixer) {
if (n)
printf(", ");
printf("%s", m_names[i]);
n = 1;
}
printf("\n");
}
int
main( )
{
int unit = 0; /* device unit (0-3) */
# define AI_DEV "/dev/audio%d"
# define AC_DEV "/dev/mixer%d"
char ai_dev[30];
char ac_dev[30];
struct snd_size s_size;
snd_chan_param s_c_p;
snd_capabilities s_c;
int fd;
int rval;
char *dname = ai_dev; /* device name */
char *actl = ac_dev;
int devmask = 0, recmask = 0, recsrc = 0;
snprintf(ai_dev, sizeof(ai_dev), AI_DEV, unit);
snprintf(ac_dev, sizeof(ac_dev), AC_DEV, unit);
/*
* Open audio device. Do not complain if not there.
*/
fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
if (fd < 0)
return (fd);
/*
* Open audio control device.
*/
ctl_fd = open(actl, O_RDWR);
if (ctl_fd < 0) {
fprintf(stderr, "invalid control device <%s>\n", actl);
close(fd);
return(ctl_fd);
}
printf("input: <%s> %d\n", dname, fd);
printf("control: <%s> %d\n", actl, ctl_fd);
if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
printf("devmask: %#x recmask: %#x recsrc: %#x\n",
devmask, recmask, recsrc);
printf("Devmask: "); d_mixer(devmask);
printf("Recmask: "); d_mixer(recmask);
printf("RecSrc: "); d_mixer(recsrc);
/*
* Set audio device parameters.
*/
rval = fd;
if (ioctl(fd, AIOGSIZE, &s_size) == -1)
printf("AIOGSIZE: %s\n", strerror(errno));
else
printf("play_size %d, rec_size %d\n",
s_size.play_size, s_size.rec_size);
if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
printf("AIOGFMT: %s\n", strerror(errno));
else {
printf("play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
printf("Play format: "); d_fmt(s_c_p.play_format);
printf("Rec format: "); d_fmt(s_c_p.rec_format);
}
}
#endif /* HAVE_{MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */
|
