155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/*
|
|
* 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 */
|